CALNETICS CORP
10-Q, 1997-05-12
PLASTICS PRODUCTS, NEC
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<PAGE>   1
                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM 10-Q

                                   (Mark One)

[X] Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange
    Act of 1934 For the Quarterly Period Ended March 31, 1997

                                       or

[ ] Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange
    Act of 1934 For the Transition Period from ____________ to ____________

Commission File Number:       0-8767

                              CALNETICS CORPORATION
             (Exact name of Registrant as specified in its charter)

          CALIFORNIA                                             95-2303687
(State or other jurisdiction of                              (I.R.S. Employer
 incorporation or organization)                             Identification No.)

               20401 PRAIRIE STREET, CHATSWORTH, CALIFORNIA 91311
               (Address of principle executive offices) (zip code)

                                 (818) 886-9819
               Registrant's telephone number, including area code


                                       N/A
Former name, former address and former fiscal year, if changed since last report

Indicate by check mark whether the Registrant (1) has filed all reports required
to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during
the preceding 12 months (or for such shorter period that the Registrant was
required to file such reports), and (2) has been subject to such filing
requirements for the past 90 days. Yes [X]  No [ ]

The number of shares outstanding of the Registrant's Common Stock as of March
31, 1997 was 3,023,799.





<PAGE>   2
                              CALNETICS CORPORATION

                                      INDEX



<TABLE>
<CAPTION>
Part I.  Financial Information                                            Page Number
- ------------------------------                                            -----------
<S>                                                                            <C>
Item 1.  Financial Statements
  Condensed Consolidated Statements of Income (Unaudited)
  Three Months and Nine Months Ended March 31, 1997 and 1996 ................... 3

  Condensed Consolidated Balance Sheets (Unaudited)
  March 31, 1997 and June 30, 1996 ............................................. 4

  Condensed Consolidated Statements of Cash Flows (Unaudited)
  Nine Months Ended March 31, 1997 and 1996 .................................... 6

  Notes to Condensed Consolidated
  Financial Statements (Unaudited) ............................................. 8

Item 2.  Management's Discussion and Analysis of
Financial Condition and Results of Operations ..................................11


Part II.  Other Information

Item 3.  Litigation.............................................................13

Item 5.  Other Information......................................................13

Item 6.  Exhibits and Reports on Form 8-K ......................................14


Signatures .....................................................................18
</TABLE>











                                  Page 2 of 77

<PAGE>   3
                         PART I - FINANCIAL INFORMATION

                              CALNETICS CORPORATION
                   CONDENSED CONSOLIDATED STATEMENTS OF INCOME
                                   (UNAUDITED)



<TABLE>
<CAPTION>
                                       Three Months Ended                 Nine Months Ended
                                             March 31,                         March 31,
                                   ----------------------------      ----------------------------
                                      1997             1996              1997            1996
                                   -----------      -----------      -----------      -----------
<S>                                <C>              <C>              <C>              <C>        
Net Sales                          $ 9,260,938      $ 9,089,762      $26,293,369      $25,488,700

Cost of Sales                        6,582,363        6,744,642       19,371,380       19,381,733
                                   -----------      -----------      -----------      -----------

Gross Profit                         2,678,575        2,345,120        6,921,989        6,106,967

Selling, general
  and administrative
  expenses                           1,668,008        1,486,616        4,418,519        4,038,503
Other expense, net, including
  interest                              74,000           95,666          250,989          335,493
                                   -----------      -----------      -----------      -----------
Total costs and
  expenses                           1,742,008        1,582,282        4,669,508        4,373,996
                                   -----------      -----------      -----------      -----------
Income from operations
  before income taxes                  936,567          762,838        2,252,481        1,732,971
Provision for
  income taxes                         395,000          319,000          948,000          722,000
                                   -----------      -----------      -----------      -----------

  Net income                       $   541,567      $   443,838      $ 1,304,481      $ 1,010,971
                                   ===========      ===========      ===========      ===========

Earnings per common
  share and common
  share equivalent                 $      0.17      $      0.14      $      0.42      $      0.33

Weighted average common
  shares and common
  share equivalents
  outstanding                        3,111,022        3,075,569        3,098,724        3,063,145
                                   ===========      ===========      ===========      ===========
</TABLE>

No dividends were paid during the periods set forth above.

                See accompanying notes to condensed consolidated
                             financial statements.

                                  Page 3 of 77

<PAGE>   4
                              CALNETICS CORPORATION
                      CONDENSED CONSOLIDATED BALANCE SHEETS
                                   (UNAUDITED)


                                     ASSETS


<TABLE>
<CAPTION>
                                                  March 31, 1997    June 30, 1996
                                                  --------------    -------------
<S>                                                <C>               <C>        
CURRENT ASSETS:
  Cash and cash equivalents                        $ 1,296,544       $ 1,877,633
  Accounts receivable, net                           5,784,310         4,997,471
  Inventories                                        5,321,585         5,470,710
  Prepaid expenses                                     208,626           254,608
  Deferred income taxes                                342,000           342,000
                                                   -----------       -----------

    Total current assets                            12,953,065        12,942,422
                                                   -----------       -----------

PROPERTY, PLANT AND EQUIPMENT
  (at cost):
  Land                                                 466,288           466,288
  Buildings and leasehold improvements               2,277,763         2,269,525
  Machinery and equipment                            5,195,047         4,587,322
  Furniture and fixtures                               265,832           248,220
                                                   -----------       -----------
                                                     8,204,930         7,571,355
  Less--Accumulated depreciation
   and amortization                                  3,931,711         3,399,998
                                                   -----------       -----------

Property, plant and equipment,
   net                                               4,273,219         4,171,357
                                                   -----------       -----------

Deposits and other assets                              168,354           171,245
Goodwill, net                                        1,350,468         1,401,268
                                                   -----------       -----------

      Total assets                                 $18,745,106       $18,686,292
                                                   ===========       ===========
</TABLE>


                See accompanying notes to condensed consolidated
                             financial statements.







                                  Page 4 of 77

<PAGE>   5
                              CALNETICS CORPORATION
                      CONDENSED CONSOLIDATED BALANCE SHEETS
                                   (UNAUDITED)

                      LIABILITIES AND SHAREHOLDERS' EQUITY




<TABLE>
<CAPTION>
                                                March 31, 1997      June 30, 1996
                                                --------------      -------------
<S>                                               <C>                <C>        
CURRENT LIABILITIES:
  Current portion of
    long-term debt                                $   213,211        $   247,187
  Accounts payable                                  2,575,322          3,214,786
  Accrued liabilities                               1,255,609          1,167,707
  Income taxes payable                                249,021            386,021
                                                  -----------        -----------
    Total current liabilities                       4,293,163          5,015,701
                                                  -----------        -----------

LONG-TERM DEBT,
  net of current portion                            4,125,659          4,740,820
                                                  -----------        -----------

DEFERRED INCOME TAXES                                  57,000             57,000
                                                  -----------        -----------

SHAREHOLDERS' EQUITY:
  Preferred stock: authorized-
    2,000,000 shares, none issued                        --                 --
  Common stock, no par value:
    Authorized - 20,000,000 shares;
    Issued and outstanding --
    3,023,799 at March 31, 1997
    and 2,959,799 at June 30, 1996                  2,554,377          2,462,345

  Retained earnings                                 7,714,907          6,410,426
                                                  -----------        -----------

     Total shareholders' equity                    10,269,284          8,872,771
                                                  -----------        -----------

    Total liabilities and
    shareholders' equity                          $18,745,106        $18,686,292
                                                  ===========        ===========
</TABLE>


                See accompanying notes to condensed consolidated
                             financial statements.






                                  Page 5 of 77

<PAGE>   6
                              CALNETICS CORPORATION
                 CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
                                   (UNAUDITED)



<TABLE>
<CAPTION>
                                                           Nine Months Ended
                                                               March 31,
                                                     -----------------------------
                                                         1997             1996
                                                     -----------       -----------
<S>                                                  <C>               <C>        
CASH FLOWS FROM OPERATING ACTIVITIES:
  Net income                                         $ 1,304,481       $ 1,010,971
                                                     -----------       -----------

   Adjustments to reconcile net income to
     net cash provided by operating activities:
       Depreciation and amortization                     596,814           539,723
       Provision for doubtful accounts                    29,864            21,000
       Changes in operating assets and
          liabilities:
          Accounts receivable                           (816,703)       (1,010,443)
          Inventories                                    149,125          (343,000)
          Prepaid expenses                                45,982           (19,108)
          Deposits and other assets                        2,891           (42,355)
          Accounts payable                              (639,464)          277,932
          Customer deposits                                 --             (38,900)
          Accrued liabilities                             87,902             9,737
          Income taxes payable                          (137,000)           58,828
                                                     -----------       -----------

       Total adjustments                                (680,589)         (546,586)
                                                     -----------       -----------

       Net cash provided by
         operating activities                            623,892           464,385
                                                     -----------       -----------

CASH FLOWS FROM INVESTING ACTIVITIES:
    Purchases of property, plant and equipment          (647,876)         (663,669)
       Net cash used in investing activities            (647,876)         (663,669)
                                                     -----------       -----------
</TABLE>





                See accompanying notes to condensed consolidated
                             financial statements.



                                  Page 6 of 77

<PAGE>   7
                              CALNETICS CORPORATION
                 CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
                                   (UNAUDITED)
                                   (CONTINUED)




<TABLE>
<CAPTION>
                                                               Nine Months Ended
                                                                   March 31,
                                                        -----------------------------
                                                            1997             1996
                                                        -----------       -----------
<S>                                                     <C>               <C>         
CASH FLOWS FROM FINANCING ACTIVITIES:
  Repayments of long-term debt                          $  (649,137)      $  (613,982)
  Net proceeds from issuance of
     common stock                                            92,032            14,380
                                                        -----------       -----------

  Net cash used in financing
     activities                                            (557,105)         (599,602)
                                                        -----------       -----------

NET DECREASE IN CASH AND
  CASH EQUIVALENTS                                         (581,089)         (798,886)

CASH AND CASH EQUIVALENTS,
  beginning of period                                     1,877,633         1,580,974
                                                        -----------       -----------

CASH AND CASH EQUIVALENTS,
  end of period                                         $ 1,296,544       $   782,088
                                                        ===========       ===========

Supplemental disclosures of cash flow information:
    Cash paid for interest                              $   250,989       $   341,747
                                                        ===========       ===========

    Cash paid for income tax                            $ 1,085,000       $   664,000
                                                        ===========       ===========
</TABLE>




                See accompanying notes to condensed consolidated
                             financial statements.






                                  Page 7 of 77

<PAGE>   8
                              CALNETICS CORPORATION

              NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
                                   (Unaudited)
                                 March 31, 1997

1.       General.

         In the opinion of the management of Calnetics Corporation (the
"Company"), the accompanying condensed consolidated unaudited financial
statements contain all adjustments, consisting of only normal recurring
accruals, necessary to present fairly the Company's financial position at March
31, 1997 and June 30, 1996, the results of its operations for the three and nine
months ended March 31, 1997 and 1996 and the cash flows for the nine months
ended March 31, 1997 and 1996. Certain information and footnote disclosures
normally included in financial statements that would have been prepared in
accordance with generally accepted accounting principles have been condensed or
omitted pursuant to the rules and regulations of the Securities and Exchange
Commission, although management of the Company believes that the disclosures in
these financial statements are adequate to make the information presented
therein not misleading. It is suggested that these condensed financial
statements be read in conjunction with the financial statements and the notes
thereto included in the Company's June 30, 1996 Form 10-K filed with the
Securities and Exchange Commission.

         The results of operations for the three and nine months ended March 31,
1997 are not necessarily indicative of the results of operations to be expected
for the full fiscal year ending June 30, 1997.

2.       Receivables.

                  The following tabulation shows the elements of receivables:

<TABLE>
<CAPTION>
                                       March 31, 1997  June 30, 1996
                                       --------------  -------------
<S>                                      <C>             <C>       
        Trade accounts receivable        $6,102,695      $5,313,471

        Less allowance for doubtful
          accounts                          318,385         316,000
                                         ----------      ----------

                 Total                   $5,784,310      $4,997,471
                                         ==========      ==========
</TABLE>









                                  Page 8 of 77

<PAGE>   9
3.       Income Taxes.

                  Income taxes for the nine-month period ended March 31, 1997
were computed using the effective tax rate estimated to be applicable for the
full fiscal year. This rate is subject to ongoing evaluation and review by
management.

4.       Long-term debt.

                  At March 31, 1997 and June 30, 1996, long-term debt consisted
of the following:

<TABLE>
<CAPTION>
                                                                                  March 31, 1997   June 30, 1996
                                                                                  --------------   -------------
<S>                                                                                 <C>             <C>       
        Term loans payable to banks, unsecured, interest at the banks'
                 reference rate (8.50 percent at March 31, 1997) plus 0.25
                 percent, due in various monthly installments of principal and
                 interest through July 1, 1999, with balloon payments totaling
                 $1,458,462 due on August 1, 1999                                    $2,312,498      $2,949,948

        Industrial revenue bond payable, principal due in annual sinking fund
                 installments ranging from $20,000 to $130,000 through December
                 2021, plus interest due monthly based on the Issuer's Weekly
                 Adjustable Interest Rates for Revenue Bonds (3.5 percent at
                 March 31, 1997), secured by a letter of credit issued by a
                 bank with an annual fee of 1.125 percent                             1,420,000       1,440,000
</TABLE>









                                  Page 9 of 77
<PAGE>   10
         Long-term debt. (cont'd)

<TABLE>
<CAPTION>
                                                                                 March 31, 1997   June 30, 1996
                                                                                 --------------   -------------
<S>                                                                                   <C>             <C>    
        Loans payable to former Agricultural Products, Inc.  ("API")
                 shareholders, unsecured, interest payable semi-annually at
                 7.50 percent, principal payable in three equal annual
                 installments through June 1999                                       301,532         301,532

        Mortgage payable to bank, secured by the related building and land,
                 principal payable in monthly installments of $1,665 plus
                 interest at the bank's prime rate (8.50 percent at March 31,
                 1997) plus 0.75 percent, with a balloon payment of $201,415
                 due on March 5, 2000                                                 259,702         274,687

        Other                                                                          45,138          21,840
                                                                                   ----------      ----------


                                                                                   $4,338,870      $4,988,007
        Current portion of long-term debt                                             213,211         247,187
                                                                                   ----------      ----------

        Long-term portion                                                          $4,125,659      $4,740,820
                                                                                   ==========      ==========
</TABLE>

                  The term loans and notes payable include certain restrictive
         financial and non-financial covenants, including certain cash
         restrictions and limitations on payment of cash dividends and
         redemption of stock.

5.       Earnings per common share and common share equivalent.

                  Earnings per common share and common share equivalent are
         based on the weighted average number of shares of common stock and
         common stock equivalents (dilutive stock options) outstanding during
         the related periods. The weighted average number of common stock
         equivalent shares includes shares issuable upon the assumed exercise of
         stock options less the number of shares assumed purchased with the
         proceeds available from such exercise. Fully diluted net income per
         share does not differ materially from net income per common share and
         common share equivalent.




                                  Page 10 of 77

<PAGE>   11
ITEM 2.           MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL
                  CONDITION AND RESULTS OF OPERATIONS

Financial condition.

                  In general, except as discussed herein, there were no
significant changes in current assets or current liabilities or the overall
financial condition of the Company between March 31, 1997, the end of the third
quarter, and June 30, 1996, the end of the prior fiscal year. Cash and cash
equivalents decreased by approximately $581,000 by March 31, 1997, due in part
to purchases of equipment, the voluntary payment of $150,000, representing three
monthly installments, of the Company's long-term bank loan, the payment of which
was in addition to the regular scheduled monthly payments, and the quicker
payment of accounts payable. In addition, accounts receivable increased by
approximately $787,000 as of March 31, 1997 due primarily to recent record sales
by the Company's Agricultural Products, Inc. subsidiary, and accounts payable
decreased by approximately $639,000 due primarily to the quicker payment of such
accounts with available cash and a temporary decrease in raw material purchases
at the Company's Manchester Plastics Co., Inc. subsidiary, as reflected by the
approximately $150,000 lower March 31, 1997 inventory value. Contrary to
previous announcement, the floods of Northern California during January 1997
did not have a significant adverse effect on the results of operations for the
Company's agricultural irrigation products.

                  For the nine months ended March 31, 1997, the Company's
pre-tax earnings have benefited from adjustments to the LIFO reserve account for
finished goods inventory at the Company's Manchester Plastics Co., Inc.
subsidiary by an amount equal to approximately $240,000.

Liquidity and Capital Resources.

                  At March 31, 1997, the Company's working capital was
$8,659,902, compared to $7,580,054 at the same time a year ago.

                  The Company has a working capital agreement with a bank under
which the Company may borrow up to $2,500,000 on an unsecured basis at the
bank's prime rate. As of March 31, 1997, the entire amount of $2,500,000 was
available under this credit arrangement, which is scheduled to expire on
December 31, 1997.

                  The Company has no immediate plans for any significant capital
expenditures and the Company believes that its available funds and internally
generated cash from operations will be sufficient to meet its working capital
needs in fiscal 1997. Certain loan agreements limit capital expenditures to
$1,000,000 in fiscal year ending June 30, 1997 and also contain limits on
subsequent years.

                  Certain statements made herein that are not related to
historical results are forward-looking in nature within the meaning of the
Private Securities Litigation Reform Act of 1995 and involve risks and
uncertainties. Such forward-looking statements are based upon assumptions as to
the future events that may not prove to be accurate, and actual results could
differ materially from those discussed in the forward-looking statements.
Factors that could cause or contribute to such differences include, but are not
limited to, a change in the need to make capital expenditures based on market
factors and a decrease in internally generated cash due to a downturn in market
conditions.



                                  Page 11 of 77

<PAGE>   12
Results of Operations.

Three months ended March 31, 1997 compared to three months ended March 31, 1996

                  Net sales for the three-month period ended March 31, 1997
increased 1.9% from $9,089,762 in the same period in 1996, to $9,260,938 in
1997.

                  Cost of sales as a percentage of sales decreased to 71.1%,
during the period January 1, 1997 to March 31, 1997, as compared to 74.2% for
the same period in the prior year. This decrease was attributed to increased
profitability of certain products produced and sold by our Agricultural Products
subsidiary.

                  Selling, general and administrative expenses for the
three-month period ended March 31, 1997 increased to $1,618,008 as compared with
$1,486,616 for the same period in the prior year, an increase of 8.8%. The
increase is mainly attributed to professional services incurred in the current
quarter relating to the proposed merger (as discussed in Part II, Item 5 below).

                  Net income for the current three-month period was $541,567 as
compared with $443,838, for the same period in the prior year, after provisions
for income taxes of $395,000 and $319,000 for the three months ended March 31,
1997 and 1996, respectively. Earnings per common share and common share
equivalent increased to $0.17 from $0.14 per share for the three months ended
March 31, 1997 and 1996, respectively. The increase in net income is attributed
primarily to increased profit margins at our Agricultural Products subsidiary.

Nine months ended March 31, 1997 compared to nine months ended March 31, 1996

                  Net sales for the nine-month period ended March 31, 1997
increased 3.2% from $25,488,700 in 1996, to $26,293,369 in 1997.

                  Cost of sales as a percentage of sales decreased to 73.7%,
during the period July 1, 1996 to March 31, 1997, as compared to 76.0% for the
same period in the prior year. The decrease is primarily attributed to increased
profitability of certain products produced and sold by our Agricultural Products
subsidiary.

                  Selling, general and administrative expenses increased to
$4,368,519 for the nine-month period ended March 31, 1997 as compared with
$4,038,503 for the same period in the prior year. The increase is mainly
attributed to professional services incurred in the current quarter relating to
the proposed merger (as discussed in Part II, Item 5 below).

                  Net income for the current nine-month period was $1,304,481 as
compared with $1,010,971 for the nine-month period ended March 31, 1996 after
provisions for income taxes of $948,000 and $722,000 for the nine months ended
March 31, 1997 and 1996, respectively. Earnings per common share and common
share equivalent increased to $0.42 from $0.33 per share for the nine months
ended March 31, 1997 and 1996, respectively. The increase in net income is
attributed primarily to increased profit margins at our Agricultural Products
subsidiary.




                                  Page 12 of 77

<PAGE>   13
                           PART II - OTHER INFORMATION

ITEM 3.  LITIGATION

                  The Company formerly operated a facility on property within
the boundaries of a federal Superfund site located in Southern California. The
Company operated at this site prior to October 1986. The Company has learned
that hazardous substances have been identified in the subsurface of the property
and that the current owner has been requested by a state agency to undertake
additional investigation at the property. The Company is also aware that the
property has been subject to a general notice letter issued by the United States
Environmental Protection Agency under the federal Superfund law. The Company, as
one of several prior operators of the property, may be held responsible for the
contamination at the site to the extent the Company caused the contamination.
The Company does not believe it is responsible for any material contamination at
the property, and has not been notified or contacted by any governmental
authority in that regard, nor named in any proceeding relating to the property.
However, if the Company were held liable under the federal Superfund law, or
other environmental law, the consequences could be material to the business of
the Company as a whole. The potential liability associated with this property
cannot be reasonably determined at this time.

ITEM 5.  OTHER INFORMATION

                  As previously announced, the Company and Summa Industries, a
California corporation ("Summa"), have agreed to a mutual termination of that
certain Agreement and Plan of Reorganization dated March 26, 1997 ("Agreement"),
pursuant to which the Company would have been merged with and into a new
to-be-formed wholly-owned subsidiary of Summa. A copy of the Agreement has been
filed as an exhibit to this quarterly report on Form 10-Q.















                                  Page 13 of 77

<PAGE>   14
ITEM 6.           EXHIBITS AND REPORTS ON FORM 8-K

                  (a) Exhibits
<TABLE>
<CAPTION>
                     Number                    Description
                     ------                    -----------
                      <S>      <C>
                      3.1     Amended and Restated Articles of Incorporation of
                              Calnetics (Exhibit 3.1 to Form 10-K filed
                              September 25, 1989).

                      3.2     Bylaws of Calnetics (Exhibit 1.2 to Form 10-K
                              filed September 21, 1978).

                      3.3     Amendment to Bylaws of Calnetics (Exhibit 3 to
                              Form 8 filed September 28, 1989).

                      10.1    Lease dated November 22, 1989 between Manchester
                              and Tom Schneider and Arlene Schneider and
                              Amendment to said lease dated December 5, 1989
                              (Exhibit 10.12 to Form 10-K dated June 30, 1991).

                      10.2    Lease dated June 2, 1992 by and between Honey
                              Protas and Ny-Glass (Exhibit 10.19 to Form 10-K
                              dated June 30, 1992).

                      10.3    Addendum No. 1 to Lease dated June 2, 1992
                              (Exhibit 10.20 to Form 10-K dated June 30, 1992).

                      10.4    Lease Guaranty Agreement entered into as of June
                              2, 1992 by Calnetics (Exhibit 10.21 to Form 10-K
                              dated June 30, 1992).

                      10.5    Memorandum of Lease with Right of First Refusal
                              and Option to Purchase dated May 22, 1992 (Exhibit
                              10.22 to Form 10-K dated June 30, 1992).

                      10.6    Side Letter Agreement re Standard Industrial
                              Commercial Single Tenant Lease by and between
                              Honey Protas as lessor and Ny-Glass as lessee
                              dated May 22, 1992 (Exhibit 10.23 to Form 10-K
                              dated June 30, 1992).

                      10.7    Calnetics Corporation 1988 Employee Stock Option
                              Plan (Exhibit 10.25 to Form 10-K dated June 30,
                              1993).

                      10.8    Calnetics Corporation 1993 Nonstatutory Stock
                              Option Plan (Exhibit 10.26 to Form 10-K dated June
                              30, 1993).

                      10.9    Business Loan Agreement dated June 28, 1993 among
                              Bank of America National Trust and Savings
                              Association, Calnetics, Manchester and Ny-Glass
                              (Exhibit 10.27 to Form
</TABLE>





                                  Page 14 of 77

<PAGE>   15
<TABLE>
<CAPTION>
                      <S>      <C>
                              10-K dated June 30, 1993).

                      10.10   First Amendment to Business Loan Agreement of June
                              28, 1993 dated as of June 20, 1994 among Bank of
                              America National Trust and Savings Association,
                              Calnetics, Manchester and Ny-Glass (Exhibit 10.17
                              to Form 10-K dated June 30, 1994).

                      10.11   Stock Purchase Agreement among Calnetics and the
                              Selling Shareholders of API effective as of April
                              30, 1994 (Exhibit 2 to Form 8-K filed June 24,
                              1994).

                      10.12   Business Loan Agreement dated June 20, 1994 among
                              The Bank of California, N.A., Calnetics,
                              Manchester, Ny-Glass and API (Exhibit 10.19 to
                              Form 10-K dated June 30, 1994).

                      10.13   Term Loan Note dated June 20, 1994 among The Bank
                              of California, N.A., Calnetics, Manchester,
                              Ny-Glass and API (Exhibit 10.24 to Form 10-K dated
                              June 30, 1994).

                      10.14   Business Loan Agreement dated June 20, 1994 among
                              Bank of America National Trust and Savings
                              Association, Calnetics, Manchester, Ny-Glass and
                              API (Exhibit 10.25 to Form 10-K dated June 30,
                              1994).

                      10.15   Noncompetition and Noninterference Agreement dated
                              June 20, 1994 among Calnetics, API and Lon
                              Schultz, individually and as trustee of the Lon
                              Schultz Charitable Remainder Unitrust (Exhibit
                              10.31 to Form 10-K dated June 30, 1994).

                      10.16   Employment Agreement dated June 20, 1994 between
                              API and Lon Schultz, an individual (Exhibit 10.32
                              to Form 10-K dated June 30, 1994).

                      10.17   Parts Purchase and Supply Agreement dated June 20,
                              1994 between API and Story Plastics, Inc., a
                              California corporation (Exhibit 10.33 to Form 10-K
                              dated June 30, 1994).

                      10.18   Loan Agreement dated December 31, 1991 between
                              California Statewide Communities Development
                              Authority and API (Exhibit 10.34 to Form 10-K
                              dated June 30, 1994).

                      10.19   Reimbursement Agreement dated December 1, 1991
                              between API and Union Bank (Exhibit 10.35 to Form
                              10-K dated June 30, 1994).

                      10.20   Renewal/Consolidation Promissory Note and Security
                              Agreement dated March 13, 1992 between API as
                              borrower
</TABLE>



                                  Page 15 of 77

<PAGE>   16
<TABLE>
<CAPTION>
                      <S>      <C>

                              and First Union National Bank of Florida as lender
                              (Exhibit 10.38 to Form 10-K dated June 30, 1994).

                      10.21   Amendment dated November 30, 1994 to Business Loan
                              Agreement dated June 20, 1994 among Bank of
                              America National Trust and Savings Association,
                              Calnetics, Manchester, Ny-Glass and API (Exhibit
                              10.31 to Form 10-K dated June 30, 1995).

                      10.22   Mortgage Modification, Consolidation, Spreader,
                              and Extension Agreement dated March 31, 1995 among
                              First Union National Bank of Florida, API and
                              Calnetics (Exhibit 10.32 to Form 10-K Dated June
                              30, 1995).

                      10.23   API Profit Sharing Plan Adoption Agreement dated
                              November 21, 1991 (Exhibit 10.39 to Form 10-K
                              dated June 30, 1994).

                      10.24   API 401(k) Plan Adoption Agreement effective as of
                              January 1, 1993 (Exhibit 10.40 to Form 10-K dated
                              June 30, 1994).

                      10.25   Nonstatutory Stock Option Agreement between
                              Calnetics and Michael A. Hornak dated February 28,
                              1994 (Exhibit 10.41 to Form 10-K dated June 30,
                              1994).

                      10.26   Nonstatutory Stock Option Agreement between
                              Calnetics and Steven L. Strawn dated February 28,
                              1994 (Exhibit 10.42 to Form 10-K dated June 30,
                              1994).

                      10.27   Nonstatutory Stock Option Agreement between
                              Calnetics and Lon Schultz dated July 18, 1994
                              (Exhibit 10.37 to Form 10-K dated June 30, 1995).

                      10.28   Amendment No.2 dated December 21, 1995 to Business
                              Loan Agreement dated June 20, 1994 among Bank of
                              America National Trust and Savings Association,
                              Calnetics, Manchester, Ny-Glass and API (Exhibit
                              10.38 to Form 10-K dated June 30, 1996).

                      10.29   Amendment No.3 dated June 28, 1996 to Business
                              Loan Agreement dated June 20, 1994 among Bank of
                              America National Trust and Savings Association,
                              Calnetics, Manchester, Ny-Glass and API (Exhibit
                              10.39 to Form 10-K dated June 30, 1996).

                      10.30   1995 Employee Stock Option Plan Dated September
                              27, 1995 (Exhibit 10.40 to Form 10-K dated June
                              30, 1996).
</TABLE>




                                  Page 16 of 77
<PAGE>   17
<TABLE>
<CAPTION>
                      <S>      <C>
                      10.31   Amendment No.4 dated December 20, 1996 to Business
                              Loan Agreement dated June 20, 1994 among Bank of
                              America National Trust and Savings Association,
                              Calnetics, Manchester, Ny-Glass and API (Exhibit
                              10.31 to Form 10-Q dated December 31, 1996).

                      10.32   Amendment No.3 dated December 19, 1996 to Business
                              Loan Agreement dated June 20, 1994 among The Bank
                              of California, a division of Union Bank of
                              California, N.A., Calnetics, Manchester, Ny-Glass
                              and API (Exhibit 10.32 to Form 10-Q dated December
                              31, 1996).

                      10.33   Amendment No.1 dated November 8, 1996 to
                              Reimbursement Agreement dated December 1, 1991
                              between Union Bank of California, N.A. and API
                              (Exhibit 10.33 to Form 10-Q dated December 31,
                              1996).

                      10.34   Hazardous Materials and Environmental Indemnity
                              Agreement between Union Bank of California, N.A.
                              and API (Exhibit 10.34 to Form 10-Q dated December
                              31, 1996).

                      10.35*  Amendment No.2 dated January 15, 1997 to
                              Employment Agreement dated June 20, 1994 between
                              API and Lon Schultz.

                      10.36*  Incentive Stock Option Agreement between Calnetics
                              and Trygve Thoresen dated January 28, 1997.

                      10.37*  Change in Control Agreement dated January 27, 1997
                              between Calnetics and Trygve Thoresen.

                      10.38*  Form of Indemnity Agreement for directors and
                              officers.

                      10.39*  Agreement and Plan of Reorganization dated March
                              26, 1997 between Calnetics and Summa Industries.

                      27.1*   Financial Data Schedule
</TABLE>

                  (b) Reports on Form 8-K

                        None.

- ------------------------------------------------------------------------------
* Filed herewith






                                  Page 17 of 77

<PAGE>   18
                                   SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the
Registrant has duly caused this report to be signed on its behalf by the
undersigned, thereunto duly authorized.


                                         CALNETICS CORPORATION
                                         (Registrant)


Dated: May 7, 1997                  /s/ CLINTON G.  GERLACH
                                    ----------------------------
                                    Clinton G. Gerlach
                                    President


Dated: May 7, 1997                  /s/ TERESA S.  LOUIE
                                    ----------------------------
                                    Teresa S. Louie
                                    Treasurer




















                                  Page 18 of 77


<PAGE>   1
                                                                 EXHIBIT 10.35


                                SECOND AMENDMENT
                                       TO
                              EMPLOYMENT AGREEMENT

                  This Second Amendment (this "Amendment") to that certain
Employment Agreement dated June 20, 1994 (the "Employment Agreement") by and
between Agricultural Products, Inc., a California corporation with its principal
executive offices at 5001 E. Philadelphia Street, Ontario, California 91761 (the
"Company"), and Lon Schultz, c/o 5001 E. Philadelphia Street, Ontario,
California 97161 (the "Executive"), is made and entered into as of January 15,
1997 (the "Effective Date").

                                    RECITALS

                  WHEREAS, on June 20, 1994 the Company and the Executive
entered into the Employment Agreement which governs Executive's employment with
the Company for a three-year period, a complete copy of which is attached hereto
as Exhibit A and incorporated herein by this reference;

                  WHEREAS, on June 5,1996 the Company and Executive entered into
a written amendment of such Employment Agreement ("First Amendment") whereby,
among other things, the aggregate amount of insurance coverage required to be
provided by the Company covering the life of the Executive was reduced from
approximately $3.5 million to $2.5 million, comprised of $1 million owned by
Executive's designee with premiums being paid by the Company as compensation to
Executive and $1.5 million owned by the Company under separate policy; and

                  WHEREAS, the Company and the Executive now desire to further
amend the Employment Agreement as set forth below.

                                    AGREEMENT

                  In consideration of the foregoing recitals and the mutual
covenants set forth herein, intending to be legally bound, the Company and the
Executive hereby agree as follows:

                  1. CAPITALIZED TERMS. Capitalized terms used herein but not
defined shall have the meanings ascribed to them in the Employment Agreement.

                  2. CONTINUED VALIDITY OF EMPLOYMENT AGREEMENT. Except as
specifically set forth herein, this Amendment shall not modify nor terminate the
Employment Agreement, as amended by the First Amendment, or any term thereof,
and such Employment Agreement shall remain in full force and effect in
accordance with its terms.

                  3. TERM. The first sentence of Section 2 of the Employment
Agreement is hereby amended in its entirety to read as follows:

                           "Subject to the provisions of Section 10 hereof, this
Agreement shall begin on the Effective Date, and shall terminate at the end of
business on the fifth anniversary date of the Effective Date unless extended."





                                  Page 19 of 77

<PAGE>   2



                  4. SALARY. Section 4 of the Employment Agreement is hereby
amended in its entirety to read as follows:

                           "Subject to the provisions of Section 10 hereof, the
Company shall pay the Executive a salary during the Employment Period as
follows: (i) $29,166.67 per month for each of the first thirty-six months (the
"Initial Employment Period"), (ii) $18,750 per month for each of the twelve
months subsequent to the Initial Employment Period, and (iii) $25,000 per month
for each of the remaining twelve months. All salary shall be paid to the
Executive in accordance with the Company's customary payroll practices for its
other executive officers, but, in any event, no less frequently than twice each
month. Any salary paid with respect to less than a full one-month period shall
be prorated, with such proration being based on the number of days in such month
and the number of days during such month that the Employment Period is in
effect. The Company shall not have the right to reduce such salary at any time
during the Employment Period without the prior written consent of the
Executive."

                  5. TERMINATION. Section 10 of the Employment Agreement is
hereby amended in its entirety to read as follows:

                           "(A) This Agreement and the Executive's rights
hereunder (except as to salary, bonuses and other rights accrued prior thereto)
shall terminate automatically as set forth in Section 2 above unless terminated
earlier pursuant to the terms of this Section 10.

                           (B) If the Executive dies at any time during the
Employment Period, then the Company shall pay to the Executive's estate or
designated beneficiary the monthly salary amount set forth in Section 4 hereof
for the month in which such death occurred and for the subsequent month.
Thereafter, if the Executive dies during the Initial Employment Period (as
defined in Section 4 above), the Company shall pay to the Executive's estate or
designated beneficiary the sum of $16,666.67 per month for the remainder of the
Initial Employment Period.

                           (C) If the Executive is disabled during the
Employment Period, then the Company shall pay to the Executive the monthly
salary amount set forth in Section 4 hereof for the month in which such
disability occurred and for the subsequent three (3) months. Thereafter, if the
Executive is disabled during the Initial Employment Period, the Company shall
pay to the Executive a monthly salary of $22,916.67 for a further and subsequent
three (3) month period of disability (or such shorter period of time as may
remain in the Initial Employment Period) and, if still disabled after the above
time periods, the Company shall pay the Executive a monthly salary of $16,667.67
for the remainder of the Initial Employment Period, if any. If and when the
Executive is able to resume his duties as set forth in this Agreement, then at
such date the Executive will be entitled to the monthly salary set forth in
Section 4 from such date for the remainder of the Employment Period.

                           (D) If (i) the Company reduces the Executive's salary
set forth in Section 4 of this Agreement or (ii) the Executive's position with
the Company is changed in a manner that materially reduces his responsibilities
or duties, then the Executive's employment shall be considered to have been
terminated by the Company without cause, entitling the Executive to the payment
described in subsection (e) below.

                           (E) The Company may terminate the Executive's
employment at any time, with or without cause, by giving written notice of such
termination to the Executive in the manner provided




                                  Page 20 of 77

<PAGE>   3
below for the giving of notices, such termination to be effective on a date
specified therein which is not less than fourteen (14) days from the date of
such notice; provided, however, any termination other than (i) "for cause" as
defined in this Section 10(e), (ii) pursuant to Section 10(b), or (iii) pursuant
to Section 10(c) shall entitle the Executive to receive the monthly salary
amount set forth in Section 4 for the remainder of the Employment Period. If the
Executive is terminated for cause during the Initial Employment Period, the
Executive shall be entitled to receive a monthly salary of $16,667.67 for the
remainder of the Initial Employment Period. Termination "for cause" shall be
deemed to be termination by the Executive (except pursuant to Section 10(b)
hereof or due to the Company's material breach of this Agreement) or termination
by the Company because of the Executive's repeated incompetence, willful
misconduct, breach of fiduciary duty involving personal profit, intentional
failure to perform stated duties, willful violation of any law, rule, or
regulation (other than traffic violations or similar offenses) or final
cease-and-desist order, or material breach of any provision of this Agreement."

                  6. WAIVER. No waiver of any obligation of any party hereto
under this Amendment shall be effective unless in a writing specifying such
waiver and executed by the other party. No waiver of any right or remedy of any
party hereto under this Amendment shall be effective unless in a writing
specifying such waiver and executed by such party. A waiver by any party hereto
of any of its rights or remedies under this Amendment on any occasion shall not
be a bar to the exercise of the same right or remedy on any subsequent occasion
or of any other right or remedy at any time.

                  7. BINDING EFFECT; BENEFITS. This Amendment shall inure to the
benefit of, and shall be binding upon, the parties hereto and their respective
successors, permitted assigns, heirs and legal representatives, including,
without limitation, any corporation with which the Company may merge or
consolidate; provided, however, that this Amendment, because it relates to
personal services, cannot be assigned by the Executive.

                  8. ATTORNEYS' FEES AND COSTS. If any action at law or in
equity is necessary to enforce or interpret the terms of this Amendment, the
prevailing party shall be entitled to reasonable attorneys' fees, costs, and
necessary disbursements in addition to any other relief to which he or it may be
entitled. The term "prevailing party" within the meaning of this Section
includes, without limitation, a party who agrees to dismiss an action upon the
other party's payment of all or a portion of the sums allegedly due or
performance of the covenants allegedly breached, or who obtains substantially
the relief sought by it.

                  9. NOTICES. Any notice or other written communication, with
respect to the employment of the Executive by the Company or any matter related
to the rights or obligations of any party under this Amendment, to be given to a
party hereto shall be given to such party at the address for such party provided
above, or such other address as such party shall provide, in writing, to the
other party. All such notices or communications shall be given by being
personally delivered, placed in the United States mail, postage prepaid,
certified or registered mail, or by being sent by prepaid air freight, overnight
delivery of which is guaranteed and acknowledgment of receipt of which is
required, to the party hereto to which such notice or communication is to be
given at the address for such party specified above. Each such notice shall be
deemed to be effective upon receipt, if personally delivered, one (1) Business
Day after being so sent by air freight, or five (5) Business Days after being so
mailed. For purposes of this Amendment, a Business Day shall mean a day other
than a Saturday, Sunday or Federal or California state holiday.

                  10.      INTEGRATION AND AMENDMENTS.  The Employment
Agreement, First Amendment



                                  Page 21 of 77
<PAGE>   4
and this Amendment constitute the entire agreement and understanding between the
parties hereto with respect to the subject matter hereof and supersedes any
prior agreement or understanding, whether written or oral, relating to such
subject matter including, without limitation, any board resolutions or oral or
written agreements or representations whatsoever regarding employment between
the Company and the Executive. No modification or amendment to this Amendment
shall be effective or binding unless in writing, specifying such modification or
amendment, executed by the parties hereto.

                  11. HEADINGS. The headings contained in this Amendment are for
reference purposes only and shall not affect the construction or interpretation
of this Amendment.

                  12. SEVERABILITY. Should any section, provision or portion of
this Amendment be declared invalid or unenforceable in any jurisdiction, then
such section, provision or portion shall be deemed to be (a) severable from this
Amendment as to such jurisdiction (but not elsewhere) and shall not affect the
remainder hereof, and (b) amended to the extent, and only to the extent,
necessary to permit such section, provision or portion, as the case may be, to
be valid and enforceable in such jurisdiction (but not elsewhere).

                  13. COUNTERPARTS. This Amendment may be executed in any number
of counterparts, each of which shall, when executed, be deemed to be an
original, but all of which together shall constitute one and the same
instrument.

                  14. GOVERNING LAW. This Amendment is made and shall be
construed under the internal laws, but not the conflicts of law provisions, of
the State of California.



                  IN WITNESS WHEREOF, the parties have executed this Amendment
as of the date first written above.

THE EXECUTIVE:                            THE COMPANY:

                                          AGRICULTURAL PRODUCTS, INC., a
                                          California corporation

   /s/ LON SCHULTZ                        By:   /s/ CLINTON G. GERLACH
- -------------------------------              -----------------------------------
Lon Schultz
                                          Its:  Chief Financial Officer
                                              ----------------------------------




                                  Page 22 of 77


<PAGE>   1
                                                                  EXHIBIT 10.36

                                                                   OPTION NO. 3

                              CALNETICS CORPORATION
                        INCENTIVE STOCK OPTION AGREEMENT
                        (1995 EMPLOYEE STOCK OPTION PLAN)

        This Incentive Stock Option Agreement (this "Agreement") is made
effective as of the Option Grant Date set forth below by and between Calnetics
Corporation, a California Corporation (the "Company"), and the optionee named on
the signature page hereto ("Optionee").

        Whereas, Optionee is an employee of the Company and/or one or more of
its subsidiaries; and

        Whereas, pursuant to the Company's 1995 Employee Stock Option Plan (the
"1995 Employee Plan"), the committee of the Board of Directors of the Company
administering the 1995 Employee Plan (the "Committee") has approved the grant to
Optionee of an incentive stock option to purchase shares of the Company's Common
Stock on the terms and conditions set forth herein.

        Now, therefore, in consideration of the foregoing recitals and the
covenants set forth herein, the parties hereto agree as follows:

        1. Governing Plan. A copy of the 1995 Employee Plan is attached hereto
as Exhibit A and incorporated herein by this reference. This Agreement is
subject in all respects to the applicable provisions of the 1995 Employee Plan,
and in the case of any conflict between the provisions of the 1995 Employee Plan
and this Agreement, the provisions of the 1995 Employee Plan shall be
controlling. Capitalized terms used but not defined herein shall have the
meanings ascribed to them in the 1995 Employee Plan.

        2. Grant of Option. The Company hereby grants to Optionee, and Optionee
hereby accepts, an incentive stock option (the "Option") to purchase the number
of shares of the Company's Common Stock indicated below upon the following terms
and subject to the following conditions:

<TABLE>
<CAPTION>
         <S>                                         <C>
        (a)       Option Grant Date:                 January 28, 1997

        (b)       Number of Shares:                  50,000 shares

        (c)       Exercise Price:                    $6.125 per share

        (d)       Vesting Schedule:                  in three equal annual installments commencing
                                                     on the first anniversary of the Option Grant Date

        (e)       Form of Payment:                   cash, unless determined otherwise by the
                                                     administrator of the 1995 Employee Plan
</TABLE>




                                  Page 23 of 77
<PAGE>   2
         3. Term and Termination. The Option shall be effective as of the Option
Grant Date and shall expire at 5:00 p.m. Chatsworth, California time, on the
earliest of (i) the applicable time set forth in Section 3.07 of the 1995
Employee Plan, (ii) the tenth anniversary of the Option Grant Date, or (iii) the
fifth anniversary of the Option Grant Date if Optionee owned on the Option Grant
Date more than 10% (after application of the family and other attribution rules
of Section 424(d) of the Internal Revenue Code) of the total combined voting
power of all classes of stock of the Company or any parent or subsidiary
corporation.

         4. Employment Rights. No provision of this Agreement or the Option
granted hereunder shall (a) confer upon Optionee any right to continue in the
employ of the Company or any of its subsidiaries, (b) affect the right of the
Company and each of its subsidiaries to terminate the employment of Optionee,
with or without cause, or (c) confer upon Optionee any right to participate in
any employee welfare or benefit plan or other program of the Company or any of
its subsidiaries other than the 1995 Employee Plan.

         5. Governing Law. This Agreement shall be governed by, interpreted
under, and construed and enforced in accordance with the internal laws, and not
the laws pertaining to conflicts or choice of laws, of the State of California
applicable to agreements made and to be performed wholly within the State of
California.

         IN WITNESS WHEREOF, the Company and Optionee have executed this
Agreement effective as of the date first written above.

CALNETICS CORPORATION                       OPTIONEE

By:   /s/ CLINTON G. GERLACH                By:   /s/ TRYGVE THORESEN
     -------------------------                 ---------------------------------
       Clinton G. Gerlach                             Trygve M. Thoresen
       Chairman of the Board
       and President                           Address: c/o 20401 Prairie Street
                                                        Chatsworth, CA 91311

















                                  Page 24 of 77


<PAGE>   1
                                                                   EXHIBIT 10.37


                           CHANGE IN CONTROL AGREEMENT

         THIS CHANGE IN CONTROL AGREEMENT (this "Agreement") is made effective
as of January 27, 1997 between Calnetics Corporation, a California corporation
(the "Company"), and Trygve Mark Thoresen (the "Executive").

         The Company's Board of Directors has determined that it is in the best
interests of the Company and its shareholders to reinforce and encourage the
continued attention and dedication of the Executive to his duties without
distraction in potentially disturbing circumstances arising from the possibility
of a change in control of the Company.

         This Agreement sets forth the severance compensation which the Company
agrees it will pay to the Executive if the Executive's employment with the
Company terminates under one of the circumstances described herein following a
Change in Control of the Company (as defined herein).

         1. Term. This Agreement shall terminate, except to the extent that any
obligation of the Company hereunder remains unpaid as of such time, upon the
termination of the Executive's employment with the Company based on death,
Disability (as defined in Section 3(b)), Retirement (as defined in Section 3(c))
or Cause (as defined in Section 3(d)) or by the Executive other than for Good
Reason (as defined in Section 3(e)).

         2. Change in Control. No compensation shall be payable under this
Agreement unless and until (a) there shall have been a Change in Control of the
Company while the Executive is still an employee of the Company and (b) the
Executive's employment by the Company thereafter shall have been terminated in
accordance with Section 3. For purposes of this Agreement, a Change in Control
of the Company shall be deemed to have occurred if (i) there shall be
consummated (x) any consolidation or merger of the Company in which the Company
is not the continuing or surviving corporation or pursuant to which shares of
the Company's Common Stock are converted into cash, securities or other
property, other than a merger of the Company in which the holders of the
Company's Common Stock immediately prior to the merger have the same
proportionate ownership of common stock of the surviving corporation immediately
after the merger, or (y) any sale, lease, exchange or other transfer (in one
transaction or a series of related transactions) of all, or substantially all,
of the assets of the Company, or (ii) the shareholders of the Company shall
approve any plan or proposal for the liquidation or dissolution of the Company,
or (iii) any person (as such term is used in Sections 13(d) and 14(d)(2) of the
Securities Exchange Act of 1934, as amended (the "Exchange Act")), shall become
the beneficial owner (within the meaning of Rule 13d-3 under the Exchange Act)
of 30% or more of the Company's outstanding Common Stock (excluding Clinton G.
Gerlach and shares deemed beneficially owned by him), or (iv) during any period
of two consecutive years, individuals who at the beginning of such period
constitute the entire Board of Directors shall cease for any reason to
constitute a majority thereof unless the election, or the nomination for
election by the Company shareholders, of each new director was approved by a
vote of at least a majority of the directors then still in office who were




                                  Page 25 of 77

<PAGE>   2
directors at the beginning of the period.

         3. Termination Following Change in Control. (a) If a Change in Control
of the Company shall have occurred while the Executive is still an employee of
the Company, the Executive shall be entitled to the compensation provided in
Section 4 upon the subsequent termination of the Executive's employment with the
Company by the Executive or by the Company unless such termination is as a
result of (i) the Executive's death; (ii) the Executive's Disability (as defined
in Section 3(b) below); (iii) the Executive's Retirement (as defined in Section
3(c) below); (iv) the Executive's termination by the Company for Cause (as
defined in Section 3(d) below); or (v) the Executive's decision to terminate
employment other than for Good Reason (as defined in Section 3(e) below).

         (b) Disability. If, as a result of the Executive's incapacity due to
physical or mental illness, the Executive shall have been absent from his duties
with the Company on a full-time basis for three months, and within 30 days after
written notice of termination is thereafter given by the Company the Executive
shall not have returned to the full-time performance of the Executive's duties,
the Company may terminate this Agreement for "Disability."

         (c) Retirement. The term "Retirement" as used in this Agreement shall
mean termination by the Company or the Executive of the Executive's employment
based on the Executive's having reached age 65 or such other age as shall have
been fixed in any arrangement established with the Executive's consent with
respect to the Executive.

         (d) Cause. The Company may terminate the Executive's employment for
Cause. For purposes of this Agreement only, the Company shall have "Cause" to
terminate the Executive's employment only on the basis of fraud,
misappropriation or embezzlement on the part of the Executive. Notwithstanding
the foregoing, the Executive shall not be deemed to have been terminated for
Cause unless and until there shall have been delivered to the Executive a copy
of a resolution duly adopted by the affirmative vote of not less than
three-fourths of the entire membership of the Company's Board of Directors at a
meeting of the Board called and held for the purpose (after reasonable notice to
the Executive and an opportunity for the Executive, together with the
Executive's counsel, to be heard before the Board), finding that in the good
faith opinion of the Board the Executive was guilty of fraud, misappropriation
or embezzlement and specifying the particulars thereof in detail.

         (e) Good Reason. The Executive may terminate the Executive's employment
for Good Reason following a Change in Control. For purposes of this Agreement,
"Good Reason" shall mean any of the following (without the Executive's express
written consent):

                  (i) the assignment to the Executive by the Company of duties
inconsistent with the Executive's position, duties, responsibilities and status
with the Company immediately prior to a Change in Control of the Company, or a
change in the Executive's titles or offices as in effect immediately prior to a
Change in Control of the Company, or any removal of the Executive from or any
failure to reelect the Executive to any of such positions, except in connection
with the termination of his employment for Disability, Retirement or Cause or as
a result of the Executive's death or by the Executive other than for Good
Reason; provided that, "Finance" may be removed from the Executive's Vice
President title at the Company's




                                  Page 26 of 77

<PAGE>   3
discretion;

                  (ii) a reduction by the Company in the Executive's base salary
as in effect on the date hereof or as the same may be increased from time to
time during the term of this Agreement or the Company's failure to increase
(within 12 months of the Executive's last increase in base salary) the
Executive's base salary after a Change in Control of the Company in an amount
which at least equals, on a percentage basis, the average percentage increase in
base salary for all officers of the Company effected in the preceding 12 months;

                  (iii) any failure by the Company to continue in effect any
benefit plan or arrangement in which the Executive is participating at the time
of a Change in Control of the Company (or any successor plans providing the
Executive with substantially similar benefits) (hereinafter referred to as
"Benefit Plans"), or the taking of any action by the Company which would
adversely affect the Executive's participation in or materially reduce the
Executive's benefits under any such Benefit Plan or deprive the Executive of any
material fringe benefit enjoyed by the Executive at the time of a Change in
Control of the Company;

                  (iv) any failure by the Company to continue in effect any
incentive plan or arrangement in which the Executive is participating at the
time of a Change in Control of the Company (or any successor plans or
arrangements providing him with substantially similar benefits) (hereinafter
referred to as "Incentive Plans"),or the taking of any action by the Company
which would adversely affect the Executive s participation in any such Incentive
Plan or reduce the Executive's benefits under any such Incentive Plan, expressed
as a percentage of his base salary, by more than 10% in any fiscal year as
compared to the immediately preceding fiscal year;

                  (v) any failure by the Company to continue in effect any plan
or arrangement to receive securities of the Company in which the Executive is
participating at the time of a Change in Control of the Company (or successor
plans or arrangements providing him with substantially similar benefits)
(hereinafter referred to as "Securities Plans") or the taking of any action by
the Company which would adversely affect the Executive's participation in or
materially reduce the Executive's benefits under any such Securities Plan;

                  (vi) a relocation of the Company's principal executive offices
to a location other than in Orange, Los Angeles, Riverside or San Bernardino
County, California, or the Executive's relocation to any place other than the
location at which the Executive performed the Executive's duties immediately
prior to a Change in Control of the Company, except for required travel by the
Executive on the Company's business to an extent substantially consistent with
the Executive's business travel obligations at the time of a Change in Control
of the Company;

                  (vii) any failure by the Company to provide the Executive with
the number of paid vacation days to which the Executive is entitled at the time
of a Change in Control of the Company;

                  (viii)   any material breach by the Company of any provision
of this Agreement;




                                  Page 27 of 77

<PAGE>   4
                  (ix) any failure by the Company to obtain the assumption of
this Agreement by any successor or assign of the Company; or

                  (x) any purported termination of the Executive's employment
which is not effected pursuant to a Notice of Termination satisfying the
requirements of Section 3(f).

         (f) Notice of Termination. Any termination of the Executive's
employment by the Company or by the Executive shall be communicated by a Notice
of Termination. For purposes of this Agreement only, a "Notice of Termination"
shall mean a written notice which shall indicate those specific termination
provisions in this Agreement relied upon and which sets forth in reasonable
detail the facts and circumstances claimed to provide a basis for termination of
the Executive's employment under the provision so indicated.

         (g) Date of Termination. "Date of Termination" shall mean (a) if this
Agreement is terminated by the Company for Disability, 30 days after Notice of
Termination is given to the Executive (provided that the Executive shall not
have returned to the performance of the Executive's duties on a full-time basis
during such 30-day period) or (b) if the Executive's employment is terminated by
the Company for any other reason, the date on which a Notice of Termination is
given; provided that if within 30 days after any Notice of Termination is given
to the Executive by the Company the Executive notifies the Company that a
dispute exists concerning the termination, the Date of Termination shall be the
date the dispute is finally determined, whether by mutual agreement of the
parties or upon final judgment, order or decree of a court of competent
jurisdiction (the time for appeal therefrom having expired and no appeal having
been perfected).

         4. Compensation upon Termination of Employment. If, following a Change
in Control, the Company shall terminate the Executive's employment other than
for the reasons specified in Sections 3(b), 3(c) or 3(d), or if the Executive
shall terminate his employment for Good Reason, then the Company shall pay to
the Executive as severance pay in a lump sum, in cash, on or before the tenth
day following the Date of Termination, an amount equal to one times the average
of the aggregate annual cash compensation (including bonuses) paid to the
Executive during the 3 calendar years preceding the Change in Control of the
Company; provided, however, that if the lump sum severance payment under this
Section 4, either alone or together with other payments which the Executive has
the right to receive from the Company, would constitute a "parachute payment"
(as defined in Section 280G of the Internal Revenue Code of 1986, as amended
(the "Code")), such lump sum payment shall be reduced to the largest amount as
will result in no portion of the lump sum payment under this Section 4 being
subject to the excise tax imposed by Section 4999 of the Code. The determination
of any reduction in the lump sum payment under this Section 4 pursuant to the
foregoing proviso shall be made by the Executive in good faith, and such
determination shall be conclusive and binding on the Company.

         5.       No Obligation To Mitigate Damages; No Effect on Other
Contractual Rights.

         (a) The Executive shall not be required to mitigate damages or the
amount of any payment provided for under this Agreement by seeking other
employment or otherwise, nor




                                  Page 28 of 77
<PAGE>   5
shall the amount of any payment provided for under this Agreement be reduced by
any compensation earned by the Executive as the result of employment by another
employer after the Date of Termination, or otherwise.

         (b) The provisions of this Agreement, and any payment provided for
hereunder, shall not reduce any amounts otherwise payable, or in any way
diminish the Executive's existing rights, or rights which would accrue solely as
a result of the passage of time, under any Benefit Plan, Incentive Plan or
Securities Plan; provided, however, that this Agreement supersedes any prior
agreements, arrangements or understandings between the Company and the Executive
with respect to severance compensation following a Change in Control.

         6. Successor to the Company. (a) The Company will require any successor
or assign (whether direct or indirect, by purchase, merger, consolidation or
otherwise) to all or substantially all of the business and/or assets or stock of
the Company, by agreement in form and substance satisfactory to the Executive,
expressly, absolutely and unconditionally to assume and agree to perform this
Agreement in the same manner and to the same extent that the Company would be
required to perform it if no such succession or assignment had taken place. Any
failure of the Company to obtain such agreement prior to the effectiveness of
any such succession or assignment shall be a material breach of this Agreement
and shall entitle the Executive to terminate the Executive's employment for Good
Reason. As used in this Agreement, "Company" shall mean the Company as
hereinbefore defined and any successor or assign to its business and/or assets
or stock as aforesaid which executes and delivers the agreement provided for in
this Section 6 or which otherwise becomes bound by all the terms and provisions
of this Agreement by operation of law. If at any time during the term of this
Agreement the Executive is employed by any corporation a majority of the voting
securities of which is then owned by the Company, "Company" as used herein shall
in addition include such employer. In such event, the Company agrees that it
shall pay or shall cause such employer to pay any amounts owed to the Executive
pursuant to Section 4 hereof.

         (b) This Agreement shall inure to the benefit of and be enforceable by
the Executive's personal and legal representatives, executors, administrators,
successors, heirs, distributees, devisees and legatees. If the Executive should
die while any amounts are still payable to him hereunder, all such amounts shall
be paid in accordance with the terms of this Agreement to the Executive's
devisee, legatee, or other designee or, if there be no such designee, to the
Executive's estate.

         7. Continuation of Employment. Nothing contained in this Agreement
shall be construed to create or imply any contract of employment between the
Executive and the Company, to confer upon the Executive any right to continue in
the employ of the Company (either before or after a Change in Control) or to
confer on the Company any right to require the Executive's continued employment.
Except as expressly set forth in this Agreement, the Company shall have the
right to deal with the Executive in the same manner as if this Agreement did not
exist, including without limitation with respect to all matters related to the
hiring, discharge, compensation and conditions of employment of the Executive.
The Company or the Executive may terminate the employment of the Executive at
any time for any reason, with or without cause.




                                  Page 29 of 77

<PAGE>   6
         8. Notices. All notices, demands or other communications hereunder
shall be in writing and shall be delivered during normal business hours by hand,
by Federal Express, United Parcel Service or other reputable overnight delivery
service, by telecopy (confirmation of receipt received), or by United States
mail, certified or registered, return receipt requested, and shall be deemed
delivered when so delivered by hand, overnight delivery or telecopy, or if
mailed three (3) days after the date of mailing, properly addressed as follows:

         If to the Company:

         Calnetics Corporation
         20401 Prairie Street
         Chatsworth, CA 91311
         Attn: President
         FAX: (818) 886-9702

         If to the Executive:

         Trygve Thoresen
         c/o 20401 Prairie Street
         Chatsworth, CA 91311
         FAX: (714) 669-1763

         or such other address as either party may have furnished to the other
in writing in accordance herewith.

         9. Miscellaneous. No provisions of this Agreement may be modified,
waived or discharged unless such waiver, modification or discharge is agreed to
in writing signed by the Executive and the Company. No waiver by either party
hereto at any time of any breach by the other party hereto of, or compliance
with, any condition or provision of this Agreement to be performed by such other
party shall be deemed a waiver of similar or dissimilar provisions or conditions
at the same or at any prior or subsequent time. No agreements or
representations, oral or otherwise, express or implied, with respect to the
subject matter hereof have been made by either party which are not set forth
expressly in this Agreement. This Agreement shall be governed by and construed
in accordance with the laws of the State of California.

         10. Validity. The invalidity or unenforceability of any provisions of
this Agreement shall not affect the validity or enforceability of any other
provision of this Agreement, which shall remain in full force and effect.

         11. Counterparts. This Agreement may be executed in counterparts, each
of which shall be deemed to be an original but all of which together will
constitute one and the same instrument.

         12. Withholding of Taxes. The Company may withhold from any amounts
payable under this Agreement all federal, state, city or other taxes as shall be
required pursuant to any law or government regulation or ruling.



                                  Page 30 of 77
<PAGE>   7
         13. Legal Fees and Expenses. It is the intent of the Company that the
Executive not be required to incur any legal fees or disbursements associated
with the attempted and/or actual enforcement of his rights under this Agreement.
The Company or its successor shall promptly pay or cause to be paid and shall
reimburse the Executive for any and all reasonable attorneys' and related fees
and expenses so incurred by the Executive.

         IN WITNESS WHEREOF, the parties have executed this Agreement as of the
date first above written.

         CALNETICS CORPORATION

         By:    /s/ Clinton G. Gerlach
             -------------------------------
               Clinton G. Gerlach
               President



         EXECUTIVE

         By:    /s/ Trygve Thoresen
             -------------------------------
               Trygve Thoresen





























                                  Page 31 of 77


<PAGE>   1
                                                                   EXHIBIT 10.38



                                     FORM OF

                               INDEMNITY AGREEMENT

This Indemnity Agreement ("Agreement") is made and entered into effective as of
the day of by and between Calnetics Corporation, a California corporation (the
Corporation"), and the undersigned (the "Agent").

WHEREAS, the Agent is currently serving as a Director and/or Officer of the
Corporation and/or its subsidiaries, and the Corporation wishes the Agent to
continue in such capacities;

NOW, THEREFORE, in consideration of the foregoing recital and the mutual
agreements set forth herein, and in order to induce the Agent to continue to
serve as a Director and/or Officer of the Corporation and/or its subsidiaries
and in consideration of continued service, the parties hereto hereby agree as
follows:

         1. The Corporation will pay on behalf of the Agent, and his or her
executors, administrators or assigns, any amount which the Agent is or becomes
legally obligated to pay in connection with any threatened, pending, or
completed claim or claims made against the Agent because of any act or omission
or neglect or breach of duty whether before, on or after the date hereof,
including any actual or alleged error or misstatement or misleading statement,
which the Agent commits or suffers while acting in his or her capacity as a
Director and/or Officer of the Corporation and/or its subsidiaries. The payments
which the Corporation will be obligated to make hereunder shall include, inter
alia, damages, judgments, settlements and costs, cost of investigation
(excluding salaries of officers or employees of the Corporation and its
subsidiaries) and costs of defense (including attorneys' fees) or legal actions,
claims or proceedings and appeals therefrom, and costs of attachment or similar
bonds; provided however, that the Corporation shall not be obligated to pay
fines or fees imposed by law or otherwise make any payments hereunder which it
is prohibited by applicable law from paying as indemnity or for any other
reason. In addition, to the extent that the Agent is, by reason of his status as
an agent of the Corporation and/or its subsidiaries, a witness in any
proceeding, he shall be indemnified against all costs and expenses (including
attorneys' fees) incurred by him or on his behalf in connection therewith, and
he shall be entitled to advancement of expenses in connection therewith under
the terms of Section 7 hereof.

         2. If a claim under this Agreement is not paid by the Corporation, or
on its behalf, within 90 days after a written claim has been received by the
Corporation, the Agent may at any time thereafter bring suit against the
Corporation to recover the unpaid amount of the claim and, if successful in
whole or in part, the Agent also shall be entitled to be paid all expenses of
prosecuting such claim.

         3. In the event of payment under this Agreement, the Corporation shall
be subrogated to the extent of such payment to all of the rights of recovery of
the Agent, who shall execute all papers as appropriate to secure such rights,
including the execution of such




                                  Page 32 of 77

<PAGE>   2
documents necessary or appropriate to enable the Corporation effectively to
bring suit to enforce such rights.

         4. The Corporation shall not be liable under this Agreement to make any
payment in connection with any claim made against the Agent:

         (a) for which payment is actually made to the Agent under a valid and
         collectible insurance policy, except in respect of any excess beyond
         the amount of payment under insurance;

         (b) for which the Agent is indemnified by the Corporation otherwise
         than pursuant to this Agreement;

         (c) based upon or attributable to the Agent gaining in fact any
         personal profit or advantage to which the Agent was not legally
         entitled;

         (d) for an account of profits made from the purchase or sale by the
         Agent of securities of the Corporation within the meaning of Section
         16(b) of the Securities Exchange Act of 1934, as amended, or similar
         provisions of any state statutory law or common law; or

         (e) brought about or contributed to by the dishonesty of the Agent
         seeking payment hereunder; provided, however, notwithstanding the
         foregoing, the Agent shall be protected under this Agreement to the
         fullest extent permitted under law as to any claims upon which suit may
         be brought against the Agent by reason of any alleged dishonesty on his
         or her part, unless a final judgment or other final adjudication
         thereof adverse to the Agent shall establish that the Agent committed
         acts of active and deliberate dishonesty with actual dishonest purpose
         and intent, which acts were material to the cause of action so
         adjudicated.

         5. No costs, charges or expenses for which indemnity shall be sought
hereunder shall be incurred without the Corporation's consent, which consent
shall not be unreasonably withheld; provided that, the Corporation may ratify
expenses incurred without its consent in its sole discretion.

         6. The Agent, as a condition precedent to indemnification under this
Agreement, shall give to the Corporation notice in writing as soon as
practicable of any claim made against the Agent for which indemnity will or
could be sought under this Agreement. Notice to the Corporation shall be
directed to Calnetics Corporation, 20401 Prairie Street, Chatsworth, California
91311, Attention: Chairman of the Board and Chief Executive Officer (or such
other address as the Corporation shall designate in writing to the Agent);
notice shall be deemed received if sent by prepaid mail properly addressed, the
date of such notice being the date postmarked. In addition, the Agent shall give
the Corporation such information and cooperation as it may reasonably require
and as shall be within the Agent's power.

         7. Costs and expenses (including attorneys' fees) incurred by the Agent
in defending or investigating any pending or threatened action, suit, proceeding
or investigation shall be paid by the Corporation in advance of the final
disposition of such matter, if the Agent shall undertake in writing to repay any
such advance in the event that it is ultimately




                                  Page 33 of 77

<PAGE>   3



determined that the Agent is not entitled to indemnification under the terms of
this Agreement. Notwithstanding the foregoing or any other provision of this
Agreement, no advance shall be made by the Corporation if it is reasonably and
promptly determined by the Board of Directors by a majority vote of a quorum of
disinterested Directors, or if such quorum is not obtainable, by independent
legal counsel, that, based upon the facts known to the Board or counsel at the
time such determination is made, (a) the Agent acted in bad faith or
deliberately breached his or her duty to the Corporation or its shareholders,
and (b) as a result of such actions by the Agent, it is more likely than not
that it will ultimately be determined that the Agent is not entitled to
indemnification under the terms of this Agreement.

         8. Nothing herein shall be deemed to diminish or otherwise restrict the
Agent's right to indemnification under any provision of the Articles of
Incorporation or Bylaws of the Corporation or under California law.

         9. This Agreement shall be governed by and construed in accordance with
the internal laws of the State of California.

         10. This Agreement shall be binding upon all successors and assigns of
the Corporation (including any transferee of all or substantially all of its
assets and any successor by merger or operation of law) and shall inure to the
benefit of the heirs, personal representatives and estate of the Agent.

         IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
duly executed and signed as of the day and year first above written.



                                               CALNETICS CORPORATION

                                               By: _____________________________



                                               AGENT

                                               _________________________________















                                  Page 34 of 77


<PAGE>   1
                                                                   EXHIBIT 10.39



                      AGREEMENT AND PLAN OF REORGANIZATION



         THIS AGREEMENT AND PLAN OF REORGANIZATION (this "Agreement") is made
and entered into effective as of March 26, 1997, by and between CALNETICS
CORPORATION, a California corporation (together with any and all subsidiaries,
"Calnetics"), and SUMMA INDUSTRIES, a California corporation (together with any
and all subsidiaries, "Summa").



                                 R E C I T A L S

         A. The authorized capital of Calnetics consists of 20,000,000 shares of
Common Stock, without par value, of which 3,023,799 shares are issued and
outstanding and held of record by a total of approximately 300 shareholders as
of the date hereof, and 2,000,000 shares of Preferred Stock, without par value,
of which no shares have been issued or are outstanding. The Common Stock of
Calnetics is registered under Section 12(g) of the Securities Exchange Act of
1934 (the "Exchange Act") and traded in The Nasdaq National Market under the
symbol "CALN."

         B. The authorized capital of Summa consists of 10,000,000 shares of
Common Stock, $.001 par value, of which 4,070,250 shares are issued and
outstanding as of the date hereof and held of record by a total of approximately
600 shareholders as of the date hereof, and 5,000,000 shares of Preferred Stock,
$.001 par value, of which no shares have been issued or are outstanding. The
Common Stock of Summa is registered under Section 12(g) of the Exchange Act and
traded in The Nasdaq National Market under the symbol "SUMX."

         C. The respective Boards of Directors of Calnetics and Summa deem it
advisable and generally to the advantage of each corporation, and in the best
interests of their respective shareholders, to cause Calnetics to be merged with
and into a newly-to-be-formed California corporation which will be a
wholly-owned subsidiary ("Subsidiary") of Summa, under and pursuant to the
provisions of the California Corporations Code (the "Merger"). Accordingly, the
respective Boards of Directors of Calnetics and Summa have approved, and will
recommend for approval of their respective shareholders, this Agreement and the
Merger contemplated hereby, and have directed their respective proper officers
to execute and deliver this Agreement and to cause the respective corporations
to perform each of their respective obligations hereunder.

         D. It is the intention of the parties hereto that the acquisition by
Summa of all of the issued and outstanding capital stock of Calnetics will
qualify as a corporate "reorganization" within the meaning of Section 368 of the
Internal Revenue Code of 1986, as amended (the "Code"), such that receipt of
Summa Common Stock will not be a taxable transaction for federal income tax
purposes for the shareholders of Calnetics, who will recognize taxable gain



                                  Page 35 of 77

<PAGE>   2



only on the cash and Debentures (as defined below) received by them as a
consequence of the Merger. This Agreement is intended to be and is adopted as a
plan of reorganization within the meaning of Section 368 of the Code.

         NOW, THEREFORE, in consideration of the foregoing recitals and the
mutual agreements, representations, warranties and covenants herein contained,
and subject to the terms and conditions hereinafter set forth, the parties
hereto hereby agree in accordance with the California Corporations Code, the
provisions of the Agreement of Merger (as defined below), and the provisions of
this Agreement, that, at the Effective Time of the Agreement of Merger,
Calnetics shall be merged with and into Subsidiary, such that Subsidiary, as the
"Surviving Corporation" in the Merger, shall continue as a single corporation
existing under the laws of the State of California and as a wholly-owned
subsidiary of Summa, and the parties hereto hereby adopt and agree to the
following agreements, terms, and conditions relating to the Merger and the
manner of carrying the same into effect.

         1.   DEFINITIONS.

              1.1 "Agreement" means, and the words "herein", "hereof",
"hereunder" and words of similar import refer to this instrument and any and all
exhibits, schedules and other attachments hereto, and any amendment hereto.

              1.2 "Agreement of Merger" refers to that certain document of even
date herewith, a copy of which is attached hereto as Exhibit A, the terms of
which are fully incorporated into, and the satisfaction of which is an express
condition of, this Agreement.

              1.3 "Calnetics Balance Sheet" means the unaudited consolidated
balance sheet of Calnetics as of December 31, 1996 referred to in Section 6.6
hereof.

              1.4 "Calnetics Common Stock" refers to any and all common stock,
without par value, of Calnetics.

              1.5 "Calnetics Financial Statements" means the audited and
unaudited consolidated financial statements of Calnetics referred to in Section
6.6 hereof.

              1.6 "Calnetics' Property" means any real property and improvements
owned, leased, used, operated or occupied by Calnetics.

              1.7 "Calnetics Shareholders" refers collectively to any and all
holders of Calnetics Common Stock of record immediately prior to the Effective
Time.

              1.8 "Commission" refers to the Securities and Exchange Commission.

              1.9 "Debenture(s)" means the 5.5% Convertible Subordinated
Debentures to be issued to the Calnetics Shareholders as a consequence of the
Merger as provided in Section 3.1.1(a)(ii) below.

              1.10 "Effective Date" means the date specified in Section 4.3
hereof.




                                  Page 36 of 77

<PAGE>   3



              1.11 "Effective Time" means that time specified in Section 4.3
hereof.

              1.12 "Environmental Law" means any federal, state, local or
foreign law, statute ordinance, rule, regulation, or treaty; all judicial
administrative, and regulatory orders, judgments, decrees, permits, and
authorizations; and common law relating to: (1) the protection, investigation,
remediation or restoration of the environment or natural resources, (2) the
handling, use, storage, treatment, disposal, release or threatened release of
any Hazardous Substance; or (3) noise, odor, pollution, contamination, land use,
or any injury or threat of injury to persons or property.

              1.13 "Exchange Act" has the meaning set forth in Recital A hereto.

              1.14 "Exchange Agent" means U. S. Stock Transfer Corporation, the
transfer agent and registrar for the Summa Common Stock.

              1.15 "Hazardous Substance" means any substance, material, or waste
that is: (1) listed, classified or regulated in any concentration pursuant to
any Environmental Law; (2) any petroleum product or by-product,
asbestos-containing material, lead-containing paint or plumbing, polychlorinated
biphenyls, radioactive materials or radon; or (3) any other substance, material,
or waste which may be the subject of regulatory action by any governmental
entity pursuant to any Environmental Law.

              1.16 "Joint Proxy Statement/Prospectus" means the joint proxy
statement of Summa and Calnetics and all supplements and amendments thereto,
mailed to shareholders of Summa and Calnetics in connection with the Merger.

              1.17 "Knowledge" means, with respect to an entity, actual
knowledge of the Chief Executive Officer, the President, the Chief Financial
Officer and/or the Chief Administrative Officer of that entity and, with respect
to an individual, actual knowledge of that individual.

              1.18 "Merger" has the meaning set forth in Recital C hereto.

              1.19 "Options" means the outstanding options to purchase shares of
Calnetics Common Stock referred to in Section 6.2(a) hereof.

              1.20 "Person" refers to any corporation, trust, partnership,
individual, association or other entity.

              1.21 "Registration Statement" means the Registration Statement on
Form S-4 to be filed with the Commission by Summa under the Securities Act, and
any amendments thereto, for the purpose of registering the Summa Common Stock
and Debentures (including the Summa Common Stock issuable upon conversion of the
Debentures and upon exercise of options exchanged as provided in Section 10.6
below) to be issued in connection with the transactions contemplated by this
Agreement.

              1.22 "Securities Act" refers to the Securities Act of 1933, as
amended.




                                  Page 37 of 77

<PAGE>   4
              1.23 "Subsidiary" has the meaning set forth in Recital C hereto.

              1.24 "Summa Balance Sheet" means the unaudited consolidated
balance sheet of Summa as of February 28, 1997 referred to in Section 7.6
hereof.

              1.25 "Summa Common Stock" refers to any and all common stock,
$.001 par value, of Summa.

              1.26 "Summa Financial Statements" refers to the audited and
unaudited consolidated financial statements of Summa referred to in Section 7.6
hereof.

              1.27 "Summa's Property" means any real property and improvements
owned, leased, used, operated or occupied by Summa.

              1.28 "Summa Shareholders" refers to those holders of Summa Common
Stock of record immediately prior to the Effective Time.

              1.29 "Surviving Corporation" refers to Subsidiary as the survivor
of the Merger.

         2.   THE SURVIVING CORPORATION.

              2.1 Surviving Corporation. The corporation which shall survive the
Merger is Subsidiary (sometimes hereinafter referred to as the "Surviving
Corporation").

              2.2 Articles of Incorporation. The Articles of Incorporation of
Subsidiary, as in effect immediately before the Effective Time, shall be amended
upon consummation of the Merger to change the name of Subsidiary to "Calnetics
Corporation," and as so amended shall be the Articles of Incorporation of the
Surviving Corporation from and after the Effective Time until changed or amended
as provided by law or such Articles of Incorporation.

              2.3 Authorized Capitalization of Surviving Corporation. The total
number of shares of all classes of capital stock which the Surviving Corporation
shall have authority to issue shall be 1,000 shares of Common Stock, $.001 par
value per share.

              2.4 Bylaws. The Bylaws of Subsidiary, as in effect immediately
before the Effective Time, shall be the Bylaws of the Surviving Corporation
until changed or amended as provided in accordance with law, the Articles of
Incorporation of the Surviving Corporation, or such Bylaws.

              2.5 Directors. There shall be (3) directors of the Surviving
Corporation from and after the Effective Time (until changed in accordance with
applicable law and the Articles of Incorporation and Bylaws of the Surviving
Corporation), who shall be the three directors of Subsidiary in office
immediately before the Effective Time.

         3.   CONVERSION OF SHARES, OPTIONS AND OTHER SECURITIES.

              3.1 Manner of Converting Shares. The manner and basis of
converting securities of Calnetics into securities of Summa shall be as follows:




                                  Page 38 of 77

<PAGE>   5
                  3.1.1    Calnetics Common Stock.

                      (a) Subject in all events to the provisions of Sections
3.1.1(b) and 3.4 below, each share of Calnetics Common Stock outstanding on the
Effective Date shall, as a consequence of the Merger, be converted automatically
into the right to receive:

                           (i)      The sum of $1.25 in cash;

                           (ii)     The additional sum of $2.25, which shall be
                                    payable pursuant to the terms and conditions
                                    of a Debenture in the form of Exhibit A to
                                    the form of Indenture attached as Exhibit B
                                    hereto; and

                           (iii)    That portion of a share of Summa Common
                                    Stock as is determined in accordance with
                                    the provisions of Section 3.1.1(c) below.

                      (b) Debentures will not be callable or otherwise
redeemable at the option of Summa during their term. Debentures will be issued
in principal denominations of $1,000 and integral multiples thereof, and holders
of Calnetics' Common Stock who would otherwise be entitled to receive a
Debenture in a principal amount of less than $1,000 will be entitled to receive
such amount, in lieu thereof and at their election to be made within 30 days
following the date of the Letter of Transmittal sent to each former shareholder
of Calnetics as provided in Section 3.2 below, either in cash or in additional
shares of Summa's Common Stock valued at the Average Trading Price (as defined
in Section 3.1.1(c) below), with cash in lieu of fractional shares as provided
in Section 3.3 below. Holders failing to make an election within this 30-day
period will be deemed to have elected to receive either additional shares of
Summa's Common Stock or cash, at the option of Summa.

                      (c) The portion of a share of Summa Common Stock which the
former Calnetics Shareholders shall be entitled to receive as a consequence of
the Merger for each share of Calnetics Common Stock held as of the Effective
Time of the Merger shall be determined by dividing $4.25 by the Average Trading
Price of a share of Summa Common Stock, but not less than .57 of a share nor
more than .77 of a share. For these purposes, the Average Trading Price will
equal the 20-day average of the mean between the closing bid and asked prices
for a share of Summa's Common Stock on The Nasdaq National Market for each of
the 20 consecutive trading days ending on the third trading day prior to the
meeting of Calnetics Shareholders to be held to consider and vote upon the
Merger, as provided in Section 8.6 below.

                  3.1.2 Options to Purchase Calnetics Common Stock. Each Option
(as defined in Section 6.2(a) below) outstanding at the Effective Time shall be
canceled as of the Effective Time by agreements with the holder thereof to
accept, in the place thereof, an option to purchase 1.167 shares of Summa Common
Stock, at the same aggregate exercise price, all




                                  Page 39 of 77

<PAGE>   6
as provided in Section 10.6 below.

                  3.1.3 Calnetics Common Stock Owned by Calnetics. Shares of
Summa Common Stock shall not be issued as a consequence of the Merger in respect
of shares of Calnetics Common Stock owned by Calnetics immediately prior to the
Effective Time, if any, and as of the Effective Time any and all such shares of
Calnetics Common Stock owned by Calnetics shall be canceled and retired, and all
rights in respect thereof shall cease to exist.

              3.2     Surrender and Exchange of Calnetics Common Stock.

                  (a) As soon as reasonably practicable after the Effective
Time, the Exchange Agent shall mail to each holder of record of Calnetics Common
Stock immediately prior to the Effective Time (excluding any shares of Calnetics
Common Stock which will be canceled pursuant to Section 3.1.3 and any shares
which constitute Perfected Dissenting Shares pursuant to Section 3.4) a letter
of transmittal (the "Letter of Transmittal") stating that the Merger has been
consummated and setting forth instructions for use in effecting the surrender of
the shares of Calnetics Common Stock in exchange for the cash, Debenture and
shares of Summa Common Stock which all holders of shares of Calnetics Common
Stock are entitled to receive as a consequence of the Merger. An election form
shall accompany each Letter of Transmittal pursuant to which each holder may
elect within 30 days following the date of the Letter of Transmittal to receive
cash or additional shares of Summa Common Stock pursuant to the provisions of
Section 3.1.1(b) above.

                  (b) Upon surrender of a certificate formerly representing
shares of Calnetics Common Stock for cancellation to the Exchange Agent,
together with a Letter of Transmittal, duly executed, and such other documents
as the Exchange Agent shall reasonably request, the holder of such certificate
shall be entitled to receive in exchange therefor (i) a certified or bank
cashier's check in the amount equal to the cash which such holder has the right
to receive pursuant to the provisions of Sections 3.1.1(a)(i), 3.1.1(b) and 3.3,
(ii) a Debenture in the aggregate principal amount which such holder has a right
to receive pursuant to Section 3.1.1(a)(ii), and (iii) a certificate
representing that number of whole shares of Summa Common Stock which such holder
has the right to receive pursuant to Section 3.1.1(a)(iii) (in each case less
the amount of any required withholding taxes), and the certificate formerly
representing shares of Calnetics Common Stock so surrendered shall forthwith be
canceled. Until surrendered as contemplated by this Section 3.2, each
certificate formerly representing shares of Calnetics Common Stock shall be
deemed for all purposes at any time after the Effective Time to evidence solely
the right to receive the cash, Debenture and number of whole shares of Summa
Common Stock into which such shares of Calnetics Common Stock have been
converted under Section 3.1 hereof.

                  (c) Notwithstanding any other provisions of this Agreement, no
dividends or other distributions declared after the Effective Time on Summa
Common Stock shall be paid with respect to any shares of Calnetics Common Stock
until the certificate formerly representing such shares is surrendered for
exchange as provided herein. Subject to the effect




                                  Page 40 of 77

<PAGE>   7
of applicable laws, following surrender of any certificate formerly representing
shares of Calnetics Common Stock, there shall be paid to the holder of shares of
Summa Common Stock issued in exchange therefor, without interest, the amount of
dividends or other distributions with a record date after the Effective Time
theretofore payable with respect to such whole shares of Summa Common stock and
not paid, less the amount of any withholding taxes which may be required
thereon.

                  (d) From and after the Effective Time, there shall be no
transfers on the stock transfer books of Calnetics of the shares of Calnetics
Common Stock which were outstanding immediately prior to the Effective Time. If,
after the Effective Time, certificates representing any such shares are
presented to the Surviving Corporation, they shall be canceled and exchanged for
certificates for the consideration, if any, deliverable in respect thereof
pursuant to this Agreement and the Merger Agreement. Certificates formerly
representing shares of Calnetics Common Stock surrendered for exchange by any
person constituting an "affiliate" of Summa for purposes of Rule 145(c) under
the Securities Act shall not be exchanged until Summa has received an Affiliate
Letter from such person in the form set forth in Exhibit K attached hereto. In
the event that any certificate which formerly represented shares of Calnetics
Common Stock shall have been lost, stolen or destroyed, upon the making of an
affidavit of that fact by the person claiming such certificate to be lost,
stolen or destroyed and, if required by Summa, the posting by such person of a
bond in such reasonable amount as Summa may direct as indemnity against any
claim that may be made against it with respect to such certificate, the Exchange
Agent will issue in exchange for such lost, stolen or destroyed certificate the
applicable Merger consideration, cash in lieu of fractional shares, and unpaid
dividends and distributions on shares of Summa Common Stock as provided herein.

              3.3 Fractional Shares. No fractional shares of Summa Common Stock
and no scrip certificates therefor shall be issued to represent any fractional
share interests in shares of Summa Common Stock, and such fractional share
interest shall not entitle the owners thereof to vote, to receive dividends, or
to exercise any other right of shareholders of Summa. In lieu of a fractional
share or scrip certificate, each holder of a share of Calnetics Common Stock
otherwise entitled to a fractional interest in a share of Summa Common Stock
shall be entitled to receive a cash payment (without interest) in an amount
equal to the fraction of such share of Summa Common Stock to which such holder
otherwise would be entitled multiplied by the Average Trading Price determined
as provided in Section 3.1.1(c) above.

              3.4 Dissenting Shares. Each Calnetics Shareholder, if any, and
each Summa Shareholder, if any, who becomes entitled, pursuant to the provisions
of the California Corporations Code, to the payment in cash of the "fair market
value" of such Shareholder's shares of Calnetics Common Stock or Summa Common
Stock, as the case may be ("Perfected Dissenting Shares"), shall receive payment
therefor from Summa, but only after the value thereof shall have been agreed
upon or finally determined pursuant to such provisions. Perfected Dissenting
Shares acquired by Summa, if any, shall be canceled.




                                  Page 41 of 77

<PAGE>   8
         4.   SHAREHOLDER APPROVALS AND EFFECTIVE DATE.

              4.1 Approval by Calnetics Shareholders. As provided in Section 8.6
below, a special meeting of the Calnetics Shareholders shall be called to be
held in accordance with the California Corporations Code on or before May 29,
1997, or as soon thereafter as is practicable, at a time, place and date to be
set by the Calnetics Board of Directors, for the purposes of considering and
voting upon a proposal to approve this Agreement and the Merger contemplated
hereby. The Board of Directors of Calnetics has recommended that the Calnetics
Shareholders approve this Agreement and the Merger.

                      By signing this Agreement where indicated on the signature
page hereof, each shareholder of Calnetics who owns or has voting control over
10% or more of the Common Stock of Calnetics issued and outstanding as of the
date hereof has agreed, subject to the terms and conditions of this Agreement,
to vote all such shares in favor of this Agreement and the Merger at the special
meeting of Calnetics Shareholders .

              4.2 Approval by Summa Shareholders and Summa. As provided in
Section 8.7 below, a special meeting of the Summa Shareholders shall be called
to be held in accordance with the California Corporations Code on or before May
29, 1997, or as soon thereafter as is practicable, at a time, place and date to
be set by the Summa Board of Directors, for the purposes of considering and
voting upon a proposal to approve the Agreement of Merger, the Merger and the
other transactions (including the issuance of Summa Common Stock) contemplated
thereby. The Summa Board of Directors has recommended that the Summa
shareholders approve the Agreement of Merger, the Merger and the other
transactions (including the issuance of Summa Common Stock) contemplated
thereby. Summa, as the sole shareholder of Subsidiary, shall approve the
Agreement of Merger, the Merger and the other transactions contemplated thereby.

              4.3 Effective Date and Time. Upon approval of this Agreement and
the Merger contemplated hereby by the Calnetics Shareholders, the Summa
Shareholders, and Summa as the sole shareholder of Subsidiary, and provided that
the Merger is not thereafter terminated as provided in Section 13 hereof, the
Agreement of Merger, along with any and all other necessary documents, shall be
executed and delivered by each of Calnetics, Summa and Subsidiary and filed with
the California Secretary of State, in accordance with applicable provisions of
the California Corporations Code. The Merger shall become effective on the date
when the Agreement of Merger, along with any and all other necessary documents,
has been duly filed with the California Secretary of State. The date of such
effectiveness is referred to herein as the "Effective Date," and the time of
such effectiveness is referred to herein as the "Effective Time." Calnetics and
Summa shall agree upon the date on which the Agreement of Merger shall be
submitted for filing in the State of California.

         5.   EFFECT OF MERGER.




                                  Page 42 of 77

<PAGE>   9
              5.1 Cessation of Calnetics' Existence. When the Merger becomes
effective, Calnetics shall be merged with and into Subsidiary, the separate
existence of Calnetics shall cease, and Subsidiary, as the Surviving Corporation
in the Merger, without further action, shall succeed to and shall possess and
enjoy all the rights, privileges, immunities, powers, purposes, and franchises,
both of a public and private nature, and be subject to all restrictions,
disabilities, and duties of Calnetics, and the Merger shall have the effects on
Calnetics and Subsidiary as provided under the California Corporations Code.

              5.2 Property. All rights, franchises and interest of Calnetics in
and to every type of property, whether real, personal or mixed, and all debts
due to Calnetics on whatever account, including stock subscriptions and causes
of action, and every other asset of Calnetics, shall be vested in the Surviving
Corporation. All such property, rights, privileges, powers and franchises shall
be thereafter the property of the Surviving Corporation. Title to any real
estate and to any other property, whether by deed or otherwise, under the laws
of the State of California or of any other jurisdiction, that is vested in
Calnetics shall not revert or be in any way impaired by reason of the Merger or
the statutes providing therefor.

              5.3 Creditor Rights. All rights of creditors and all liens upon
the property of Calnetics existing immediately prior to the Effective Time shall
be preserved unimpaired, and all debts, liabilities, obligations, penalties and
duties of Calnetics shall thenceforth attach to the Surviving Corporation, and
may be enforced against it to the same extent as if they had been incurred or
contracted by it. No liability or obligation due or to become due, nor any claim
or demand existing against either corporation or any shareholder, officer or
director thereof, shall be impaired by the Merger.

              5.4 Legal Actions. No action or proceeding, whether civil or
criminal, pending on the Effective Date by or against either corporation, or any
shareholder, officer, or director thereof, shall abate or be discontinued by the
Merger, but may be enforced, prosecuted, settled, or compromised as if the
Merger had not occurred, or the Surviving Corporation may be substituted in such
action or proceeding in place of Calnetics.

              5.5 Delivery of Documents. At any time, or from time to time,
after the Effective Date, the last acting officers of Calnetics, or the
corresponding officers of the Surviving Corporation, may, in the name of the
Surviving Corporation, execute and deliver all such proper deeds, assignments,
and other instruments and take or cause to be taken all such further or other
action as the Surviving Corporation may deem necessary or desirable in order to
vest, perfect or confirm in the Surviving Corporation title to and possession of
all of Calnetics' property, rights, privileges, immunities, powers, purposes and
franchises, and otherwise to carry out the purposes of this Agreement.

         6.   REPRESENTATIONS AND WARRANTIES OF CALNETICS.




                                  Page 43 of 77

<PAGE>   10
              Calnetics hereby represents and warrants to Summa and Subsidiary
as follows (it being acknowledged that Summa is entering into this Agreement in
material reliance upon each of the following representations and warranties):

              6.1 Organization and Corporate Power. Calnetics is a corporation
duly organized, validly existing and in good standing under the laws of the
State of California, and is duly qualified and in good standing to do business
as a foreign corporation in each jurisdiction in which such qualification is
required and where the failure to be so qualified would have a materially
adverse effect upon Calnetics. Calnetics has all requisite corporate power and
authority to conduct its business as now being conducted and to own and lease
the properties which it now owns and leases. The Articles of Incorporation, as
amended to date, certified by the California Secretary of State, the Bylaws of
Calnetics, as amended to date, and the resolutions of Calnetics' Board of
Directors authorizing the execution, delivery and performance of this Agreement,
all certified by the Secretary of Calnetics, which have previously been provided
to Summa by Calnetics, are true and complete copies thereof as currently in
effect.

              6.2     Capitalization.

                  (a) The authorized capital stock of Calnetics consists of
20,000,000 shares of Calnetics Common Stock and 2,000,000 shares of preferred
stock, without par value. As of the date hereof, there are 3,023,799 shares of
Calnetics Common Stock issued and outstanding. All of the issued and outstanding
shares of Calnetics Common Stock were validly issued and are fully paid,
nonassessable and free of preemptive rights. In addition, there are currently
outstanding options to purchase from Calnetics an aggregate of 240,000
additional shares of Calnetics Common Stock (the "Options"). Set forth on
Exhibit C attached hereto is a full and complete listing setting forth the name
and address of each holder of all Options that are outstanding as of the date
hereof, the number of shares subject to each such Option, and the exercise price
relating thereto.

                  (b) Except expressly set forth in Section 6.2(a) above and on
Exhibit C attached hereto, there are no warrants, options, calls, commitments or
other rights to subscribe for or to purchase from Calnetics any capital stock of
Calnetics or any securities convertible into or exchangeable for any shares of
capital stock of Calnetics, or any other securities or agreements pursuant to
which Calnetics is or may become obligated to issue any shares of its capital
stock, nor is there outstanding any commitment, obligation or agreement on the
part of Calnetics to repurchase, redeem or otherwise acquire any of the
outstanding shares of its capital stock.

              6.3 Authorization; Government Approvals. Calnetics has full
corporate power and authority to enter into, execute and deliver this Agreement,
to execute all attendant documents and instruments necessary to consummate the
transactions herein contemplated, and to perform its obligations hereunder,
subject to receipt of the requisite approval of the Calnetics Shareholders. This
Agreement (and each and every other agreement, document and




                                  Page 44 of 77

<PAGE>   11
instrument to be executed by Calnetics hereunder) has been effectively
authorized by all necessary action on the part of the Board of Directors of
Calnetics, which authorizations remain in full force and effect, has been duly
executed and delivered by Calnetics, and no other authorizations or proceedings
on the part of Calnetics are required to authorize this Agreement and/or the
transactions contemplated hereby, except for receipt of the requisite approval
of the Calnetics Shareholders. This Agreement constitutes the legal, valid and
binding obligation of Calnetics, subject to receipt of the requisite approval of
the Calnetics Shareholders, enforceable with respect to Calnetics in accordance
with its terms, except as enforcement hereof may be limited by bankruptcy,
insolvency, reorganization, priority or other laws or court decisions relating
to or affecting generally the enforcement of creditors' rights or affecting
generally the availability of equitable remedies. Other than in connection with
the filing of the Agreement of Merger with the California Secretary of State and
related assumption of tax liabilities, proceedings with the Commission, and the
proceedings contemplated by Section 8.6 hereof, no authorization, consent or
approval of any public body or authority is necessary for the consummation by
Calnetics of the transactions contemplated by this Agreement.

              6.4 No Conflicts. Except as disclosed on the Calnetics Disclosure
Schedule attached hereto as Exhibit D, neither the execution and delivery of
this Agreement, nor the consummation by Calnetics of any of the transactions
contemplated hereby, nor compliance by Calnetics with any of the provisions
hereof, will (i) conflict with or result in a breach of, violation of, or
default under any of the terms, conditions or provisions of any note, debenture,
bond, mortgage, indenture, license, lease, credit agreement or other agreement,
document, instrument or obligation (including, without limitation, any of
Calnetics' charter documents) to which Calnetics is a party or by which any of
its assets or properties may be bound, or (ii) violate any judgment, order,
injunction, decree, statute, rule or regulation applicable to Calnetics or any
of its officers, directors, employees, assets or properties, excluding from the
foregoing clauses (i) and (ii) any conflicts, breaches, violations or defaults
that would not have a materially adverse affect on Calnetics or materially
impair Calnetics' ability to consummate the transactions contemplated hereby, or
for which Calnetics shall have received before the Effective Time appropriate
consents or waivers.

              6.5 Subsidiaries. Calnetics has no subsidiaries and no
investments, directly or indirectly, or other financial interest in any other
corporation or business organization, joint venture or partnership of any kind
whatsoever except as reflected in the Calnetics Financial Statements (defined in
Section 6.6 below) or as shown on the Calnetics Disclosure Schedule.

              6.6 Financial Statements. Attached hereto as Exhibit E are (i) the
audited consolidated financial statements of Calnetics for each of its fiscal
years ended June 30, 1994, 1995 and 1996, consisting of balance sheets as of
such dates, the related statements of income for the periods then ended, and the
notes thereto, certified by Arthur Andersen LLP, and (ii) unaudited consolidated
financial statements of Calnetics for the 6 months ended December 31, 1996,
consisting of the balance sheet as of such date (the "Calnetics Balance Sheet"),
the related statement of income for the period then ended, and the notes
thereto,




                                  Page 45 of 77

<PAGE>   12
certified by the chief financial officer of Calnetics. Such financial statements
(and the notes related thereto) are herein sometimes collectively referred to as
the "Calnetics Financial Statements." The Calnetics Financial Statements (i) are
derived from the books and records of Calnetics, which books and records have
been consistently maintained in a manner which reflects, and such books and
records do fairly reflect in all material respects, the assets and liabilities
of Calnetics, (ii) fairly present in all material respects the financial
condition of Calnetics on the respective dates of such statements and the
results of its operations for the periods indicated, except as may be disclosed
in the notes thereto, and (iii) have been prepared in all material respects in
accordance with generally accepted accounting principles consistently applied
throughout the periods involved (except for footnote disclosures to the
unaudited financial statements and as otherwise disclosed in the notes thereto).

              6.7 Absence of Undisclosed Liabilities. Except as and to the
extent reflected or reserved against in the Calnetics Balance Sheet, and as to
matters arising in the ordinary course of its business since the date of the
Calnetics Balance Sheet that are disclosed in the Calnetics Disclosure Schedule,
Calnetics has no liability or obligation (whether accrued, to become due,
contingent or otherwise) which individually or in the aggregate could have a
materially adverse effect on the business, assets or condition (financial or
otherwise) of Calnetics.

              6.8 Absence of Certain Developments. Except as set forth in the
Calnetics Disclosure Schedule, since the date of the Calnetics Balance Sheet
there has been (i) no declaration, setting aside or payment of any dividend or
other distribution with respect to any capital stock of Calnetics, no
redemption, purchase or other acquisition of any shares of Calnetics' capital
stock, and no split-up or other recapitalization relative to any of such capital
stock, nor any action authorizing or obligating Calnetics to do any of the
foregoing; (ii) no loss, destruction or damage to any material property or asset
of Calnetics, whether or not insured; (iii) no acquisition or disposition of
material assets (or any contract or arrangement therefor) or any other material
transaction by Calnetics, otherwise than for fair value and in the ordinary
course of business; (iv) no discharge or satisfaction by Calnetics of any lien
or encumbrance or payment of any material obligation or liability (absolute or
contingent) other than current liabilities shown on the Calnetics Balance Sheet,
or current liabilities incurred since the date thereof in the ordinary course of
business, (v) no sale, assignment or transfer by Calnetics of any of its
tangible or intangible assets including any security interest or other
encumbrance, or waiver by Calnetics of any rights of value which, in any such
case, is outside the ordinary course of business and material to the business of
Calnetics; (vi) no payment or accrual (except consistent with past practices) of
any bonus to or change in the compensation of any director, officer or employee,
whether directly or by means of any bonus, pension plan, contract or commitment;
(vii) no write-off or material reduction in the carrying value of any asset
which is material to the business of Calnetics; (viii) no disposition or lapse
of rights as to any intangible property which is material to the business of
Calnetics; (ix) except for ordinary travel advances, no loans or extensions of
credit to shareholders, officers, directors or employees of Calnetics; (x) no
loss of a customer of or supplier to Calnetics the loss of which could
reasonably be expected to materially adversely affect Calnetics; (xi) no
agreement




                                  Page 46 of 77

<PAGE>   13
to do any of the things described in this Section 6.8, or (xii) no materially
adverse change in the condition (financial or otherwise) of Calnetics or in its
assets, liabilities, properties or business.

              6.9 Real Property. Set forth in the Calnetics Disclosure Schedule
is a complete and accurate description of each parcel of real property owned by
or leased to and occupied by Calnetics, and Calnetics neither owns or leases,
nor occupies, any other real property. Except as would be disclosed in a
reasonably diligent inspection, to Calnetics' Knowledge, the buildings and all
fixtures and improvements located on such real property are in good operating
condition, ordinary wear and tear excepted. To Calnetics Knowledge, Calnetics is
not in violation of any zoning, building or safety ordinance, regulation or
requirement or other law or regulation applicable to the operation of owned or
leased properties, the violation of which could reasonably be expected to have a
material adverse affect upon Calnetics, its condition (financial or otherwise),
assets, liabilities, properties or business, and Calnetics has not received any
notice of violation with which it has not complied or is not taking steps to
comply. Calnetics has good and marketable title to all such real property owned
by Calnetics, free and clear of all liens, mortgages, encumbrances, easements,
leases, restrictions and claims of any kind whatsoever except for (i) those
matters shown on the Calnetics Disclosure Schedule, (ii) liens for taxes and tax
assessments not yet due and payable; and (iii) mechanics' or similar liens for
materials or services furnished or to be furnished after the date hereof. All
leases of real property to which Calnetics is a party are fully effective in
accordance with their respective terms and afford Calnetics peaceful and
undisturbed possession of the subject matter of the lease, and there exists no
material default on the part of Calnetics or termination thereof, except as may
be set forth in the Calnetics Disclosure Schedule.

              6.10 Tangible Personal Property. Set forth in the Calnetics
Disclosure Schedule hereto is a complete list of all items of tangible personal
property (including without limitation all items of tooling) owned, leased or
otherwise used by Calnetics in the current conduct of its business, wherever
located, where the original cost was in excess of $50,000.00. Except as set
forth in the Calnetics Disclosure Schedule, Calnetics has, and at the Effective
Date will have, good and marketable title to, or in the case of leased equipment
a valid leasehold interest in, and is in the possession of, all such items of
personal property owned or leased by it, free and clear of all title defects,
mortgages, pledges, security interests, condition sales agreements, liens,
restrictions or encumbrances whatsoever. Included in the Calnetics Disclosure
Schedule is a list of all outstanding equipment leases and maintenance
agreements to which Calnetics is a party as lessee and which individually
provide for future lease payments in excess of $5,000 per month, with the
identities of the other parties to all such leases and agreements shown thereon.
All leases of tangible personal property to which Calnetics is a party and which
are material to the business of Calnetics are fully effective in accordance with
their respective terms, and there exists no material default on the part of
Calnetics or termination thereof, except as may be set forth in the Calnetics
Disclosure Schedule. Each item of capital equipment reflected in the Calnetics
Balance Sheet which is used in the current conduct of Calnetics' business is in
good operating and usable condition and repair, ordinary wear and tear excepted,
and is suitable for use in the ordinary course of




                                  Page 47 of 77

<PAGE>   14
Calnetics' business and fit for its intended purposes, except as may be set
forth in the Calnetics Disclosure Schedule.

              6.11 Tax Matters. Calnetics has, since its inception, duly filed
and timely all federal, state, county and local tax returns required to have
been filed by it in those jurisdictions where the nature or conduct of its
business required such filing and where the failure to so file would be
materially adverse to Calnetics. Copies of all tax returns for the past three
years have been made available for inspection by Summa prior to the execution
hereof. All federal, state, county and local taxes, including but not limited to
those taxes due with respect to Calnetics' properties, income, gross receipts,
excise, occupation, franchise, permit, licenses, sales, payroll, and inventory
due and payable as of the date of the Effective Date by Calnetics have been paid
or validly extended. The amount reflected in the Calnetics Balance Sheet as
liabilities or reserves for taxes which are due but not yet payable is
sufficient for the payment of all accrued and unpaid taxes of the types referred
to hereinabove. No consent to the application of Section 341(f)(2) of the
Internal Revenue Code of 1986, as amended, has been filed with respect to
Calnetics.

              6.12 Accounts Receivable. The accounts receivable reflected in the
Calnetics Balance Sheet constituted all accounts receivable of Calnetics as of
the date thereof, other than accounts receivable fully written off as
uncollectible as of such date in accordance with consistently applied prior
practice. All such accounts receivable arose from valid sales made (as opposed
to consignments) or services rendered in the ordinary course of business, and
are not subject to any return privileges, set-off or counter-claim, except as
disclosed on the Calnetics Disclosure Schedule. Except as disclosed on the
Calnetics Disclosure Schedule, such accounts receivable have been collected in
full since the date of the Calnetics Balance Sheet or, to Calnetics' Knowledge,
are collectible at their full respective amounts (net of allowance for doubtful
accounts established in accordance with consistently applied prior practice).
Based upon the prior experience of Calnetics, the "allowance for doubtful
accounts" shown on the Calnetics Balance Sheet is sufficient to cover all
doubtful accounts.

              6.13 Inventories. Calnetics has good and marketable title to all
of its inventories of raw materials, work-in-process and finished goods,
including models and samples, free and clear of all security interests, liens,
claims and encumbrances, except as set forth in the Calnetics Disclosure
Schedule. All such inventories consist of items that are usable and salable in
the ordinary course of business of Calnetics for an amount at least equal to the
book value thereto, plus the costs of disposition thereof, and represent
quantities, individually and in the aggregate, not in excess of one year's
requirements for its business as currently conducted, except as may be set forth
in the Calnetics Disclosure Schedule.

              6.14 Contracts and Commitments. Calnetics has no contract,
agreement, obligation or commitment, written or oral, expressed or implied,
which involves a commitment or liability in excess of $100,000 or for a term of
more than one year or whose terms do not permit cancellation without liability
on 90 days' notice or less (other than obligations which are included in
accounts payable), and no union contracts, employee or




                                  Page 48 of 77

<PAGE>   15
consultant contracts, loan, credit or other financing agreements, inventory
flooring arrangements, debtor or creditor arrangements, security agreements,
licenses, franchise, manufacturing, distributorship or dealership agreements,
leases, or bonus, health or stock option plans, except for those described in
the Calnetics Disclosure Schedule, all of which have been made available to
Summa prior to the execution hereof. As of the date hereof, to Calnetics'
Knowledge, there exists no circumstances which would affect the validity or
enforceability of any of such contracts and other agreements in accordance with
their respective terms. Except as set forth in the Calnetics Disclosure
Schedule, Calnetics has performed and complied in all material respects with all
obligations required to be performed by it to date under, and is not in default
(without giving effect to any required notice or grace period) under, or in
breach of, the terms, conditions or provisions of any of such contracts and
other agreements. Except as set forth in the Calnetics Disclosure Schedule, the
validity and enforceability of any contract or other agreement described herein
has not been and shall not in any manner be affected by the execution and
delivery of this Agreement without any further action. Except as set forth in
the Calnetics Disclosure Schedule, Calnetics has no material contract,
agreement, obligation or commitment which requires or will require future
expenditures (including internal costs and overhead) in excess of reasonably
anticipated receipts, nor which is likely to be materially adverse to Calnetics'
business, assets or condition (financial and otherwise).

              6.15 Patents, Trade Secrets and Customer Lists. Except as set
forth in the Calnetics Disclosure Schedule, Calnetics does not have any patents,
applications for patents, trademarks, applications for trademarks, trade names,
brand names, licenses or service marks relating to the business of Calnetics,
nor does any present or former shareholder, officer, director or employee of
Calnetics own any patent rights relating to any products manufactured, rented or
sold by Calnetics. Except as set forth in the Calnetics Disclosure Schedule, to
the Knowledge of Calnetics, Calnetics has the unrestricted right to use, free
and clear of any claims or rights of others, all trade secrets, customer lists,
manufacturing and secret processes, trademarks, trade names, brand names,
licenses and service marks reasonably necessary to the manufacturing and
marketing of all products made or proposed to be made by Calnetics, and, to the
Knowledge of Calnetics, the continued use thereof by Calnetics following the
Effective Date will not conflict with, infringe upon, or otherwise violate any
rights of others. To Calnetics' Knowledge, Calnetics has not used and is not
making use of any confidential information or trade secrets of any present or
past employee of Calnetics that has not been assigned to Calnetics or that
Calnetics does not have the right to use.

              6.16 No Pending Material Litigation or Proceedings. Except as set
forth in the Calnetics Disclosure Schedule, there are no actions, suits or
proceedings pending or, to Calnetics' Knowledge, threatened against or directly
affecting Calnetics (including actions, suits or proceedings where liabilities
may be adequately covered by insurance) at law or in equity or before or by any
federal, state, municipal or other governmental department, commission, court,
board, bureau, agency or instrumentality, domestic or foreign, or affecting any
of the shareholders, officers or directors of Calnetics in connection with the
business,




                                  Page 49 of 77

<PAGE>   16
operations or affairs of Calnetics, which could reasonably be expected to result
in any material adverse change in the business, properties, assets or condition
(financial or otherwise) of Calnetics, or which question or challenge the
transaction contemplated hereby. Except as set forth in the Calnetics Disclosure
Schedule, to Calnetics' Knowledge, Calnetics has not, during the past three
years, been threatened with any action, suit, proceedings or claim (including
actions, suits, proceedings or claims where its liabilities may be adequately
covered by insurance) for personal injuries allegedly attributable to products
sold or services performed by Calnetics asserting a particular defect or
hazardous property in any of Calnetics' products, services or business practices
or methods, nor has Calnetics been a party to or threatened with proceedings
brought by or before any federal or state agency; and Calnetics has no Knowledge
of any defect or hazardous property, claimed or actual, in any such product,
service, business practice or method. Calnetics is not subject to any voluntary
or involuntary proceeding under the United States Bankruptcy Code and has not
made an assignment for the benefit of creditors.

              6.17 Insurance. Calnetics maintains insurance with reputable
insurance companies on such of its equipment, tools, machinery, inventory and
properties as are usually insured by companies similarly situated in the same
geographic location and to the extent customarily insured, and maintains
products and personal liability insurance, and such other insurance against
hazards, risks and liability to persons and property as is customary for
companies similarly situated in the same geographic location. A true and
complete listing and general description of each of Calnetics' insurance
policies as currently in force, including all policies of group medical and/or
dental insurance, is set forth in the Calnetics Disclosure Schedule, copies of
all of which have previously been made available to Summa. All such insurance
policies currently are in full force and effect.

              6.18 Arrangements with Personnel. Except as set forth in the
Calnetics Disclosure Schedule, no shareholder, director, officer or employee of
Calnetics is presently a party to any transaction with Calnetics, including
without limitation any contract, loan or other agreement or arrangements
providing for the furnishing of services by, the rental of real or personal
property from or to, or otherwise requiring loans or payments to, any such
shareholder, director, officer or employee, or to any member of the family of
any of the foregoing, or to Calnetics' Knowledge, to any corporation,
partnership, trust or other entity in which any shareholder, director, officer
or employee or any member of the family of any of them has a substantial
interest or is an officer, director, trustee, partner or employee. There is set
forth in the Calnetics Disclosure Schedule a list showing (i) the name, title,
date and amount of last compensation increase, and aggregate compensation,
including amounts paid or accrued pursuant to any bonus, pension, profit
sharing, commission, deferred compensation or other plans or arrangements in
effect as of the date of this Agreement, of each officer or employee of
Calnetics whose salary and other compensation, in the aggregate, received from
Calnetics or accrued is at an annual rate (or aggregated for the most recently
completed fiscal year) in excess of $100,000, as well as any employment and/or
severance agreements relating to any such persons; (ii) a description of any and
all bonus, pension, profit sharing, commission, deferred compensation or other
plans or arrangements in effect for any of




                                  Page 50 of 77

<PAGE>   17
Calnetics' employees as of the date of this Agreement; (iii) a description of
any noncompetition or similar agreements to which Calnetics or any shareholder,
director, officer or employee of Calnetics is a party; (iv) all powers of
attorney from Calnetics to any person or entity; and (v) the name of each person
or entity authorized to borrow money or incur or guarantee indebtedness on
behalf of Calnetics. Calnetics has made available to Summa copies of all written
personnel policies, including without limitation vacation, severance, bonus,
profit sharing and commission policies, applicable to any of Calnetics'
employees. Neither the execution and delivery of this Agreement by Calnetics,
nor the consummation by Calnetics of any of the transactions contemplated
hereby, or compliance by Calnetics with any of the provisions hereof, shall
create any obligation or liability on the part of Calnetics under any bonus,
profit sharing, deferred compensation of other plan or arrangement in effect as
of the date of this Agreement, other than the vesting of certain outstanding
options.

              6.19 Labor Relations. Except as set forth in the Calnetics
Disclosure Schedule, Calnetics has never been a party to any collective
bargaining agreement or other contract with a labor union, nor, to Calnetics'
Knowledge, is any union, labor organization or group of employees of Calnetics
presently seeking the right to enter into collective bargaining with Calnetics
on behalf of any of its employees.

              6.20 Bank Accounts. All bank and savings accounts, and other
accounts at similar financial institutions, of Calnetics are listed in the
Calnetics Disclosure Schedule, and copies of all signature cards or other
documentation reflecting all individuals who are authorized to withdraw funds
from any such accounts have been made available to Summa.

              6.21 Absence of Questionable Payments. Neither Calnetics nor, to
Calnetics' Knowledge, any shareholder, director, officer, agent, employee,
consultant or other person associated with or acting on behalf of any of them,
has (i) used any corporate funds for unlawful contributions, gifts,
entertainment or other unlawful expenses relating to political activity, (ii)
made any direct or indirect unlawful payments to governmental officials or
others from corporate funds, engaged in any payments or activity which would be
deemed a violation of the Foreign Corrupt Practices Act or rules or regulations
promulgated thereunder, or (iii) established or maintained any unlawful or
unrecorded accounts.

              6.22 Compliance with Laws. Calnetics holds all licenses,
franchises, permits and authorizations necessary for the lawful conduct of its
business as presently conducted, has complied with all applicable statutes,
laws, ordinances, rules and regulations of all governmental bodies, agencies and
subdivisions having, asserting or claiming jurisdiction over it, with respect to
any part of the conduct of its business and corporate affairs, where the failure
to so hold or comply could reasonably be expected to have a material adverse
affect upon Calnetics' condition (financial or otherwise), business, assets or
properties.

              6.23    Environmental Matters.





                                  Page 51 of 77

<PAGE>   18
                  (a) To the Knowledge of Calnetics, except as set forth on the
Calnetics Disclosure Schedule:

                      (i) Calnetics has complied with all applicable
Environmental Laws;

                      (ii) Calnetics' Property (including soils, groundwater,
surface water, buildings or other structures) is not contaminated with any
Hazardous Substances that may subject Summa to liability under any Environmental
Law;

                      (iii) the properties formerly owned or operated by
Calnetics were not contaminated with Hazardous Substances during the period of
ownership or operation by Calnetics that may subject Calnetics to liability
under any Environmental Law;

                      (iv) Calnetics is not subject to liability under any
Environmental Law for any Hazardous Substance disposal or contamination on any
third party property;

                      (v) Calnetics has not been associated with any release or
threat of release of any Hazardous Substance that may subject Calnetics to
liability under any Environmental Law;

                      (vi) Calnetics has not received any notice, demand,
letter, claim or request for information alleging that Calnetics may be in
violation of, or liable under, any Environmental Law;

                      (vii) Calnetics is not subject to any orders, decrees,
injunctions or other arrangements with any governmental entity, nor is subject
to any indemnity or other agreement with any third party relating to liability
under any Environmental Law or relating to Hazardous Substances;

                      (viii) there are no circumstances or conditions involving
Calnetics that could reasonably be expected to result in any claims, liability,
investigations, costs or restrictions on the ownership, use or transfer of any
of Calnetics' Property pursuant to any Environmental Law; and

                      (ix) Calnetics' Property does not contain any underground
storage tanks, asbestos-containing material, lead-based products, or
polychlorinated biphenyls.

              6.24 Relationships with Customers and Suppliers. Except as set
forth in the Calnetics Disclosure Schedule, no present customer or substantial
supplier to Calnetics has indicated an intention to terminate or materially and
adversely alter its existing business relationship therewith, and Calnetics has
no reason to believe that any of the present customers of or substantial
suppliers to Calnetics intends to do so, other than, in each such case, any
customer or substantial supplier the loss of which could not reasonably be
expected to materially adversely affect Calnetics.




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<PAGE>   19
              6.25 Brokerage. Except as set forth in the Calnetics Disclosure
Schedule, Calnetics has no obligation to any person or entity for brokerage
commissions, finder's fees or similar compensation in connection with the
transactions contemplated by this Agreement.

              6.26 Reports Under the Exchange Act. The Calnetics Common Stock is
registered under Section 12(g) of the Exchange Act. Accordingly, Calnetics is
subject to the information requirements of the Exchange Act, and in accordance
therewith files reports and other information with the Commission. Since January
1, 1992, Calnetics has filed with the Commission on a timely basis all such
reports which Calnetics has been required to file under the Exchange Act.
Calnetics has made available to Summa accurate and complete copies of each
registration statement, report, proxy statement, information statement or
schedule, together with all amendments thereto, that were required to be filed
with the SEC by Calnetics since January 1, 1992 (the "Calnetics SEC Documents").
As of their respective dates, the Calnetics SEC Documents complied in all
material respects with the applicable requirements of the Securities Act and the
Exchange Act, as the case may be, and none of the Calnetics SEC Documents
contained any untrue statement of a material fact or omitted to state a material
fact required to be stated therein or necessary to make the statements therein,
in light of the circumstances under which they were or are made, not misleading.

              6.27 Disclosure. Neither this Agreement nor any certificate,
exhibit, or other written document or statement, furnished to Summa by or on
behalf of Calnetics in connection with the transactions contemplated by this
Agreement contained or contains any untrue statement of a material fact or
omitted or omits to state a material fact necessary to be stated in order to
make the statements contained herein or therein, in the light of the
circumstances in which they were made, not misleading. Calnetics has no
Knowledge of any fact which has not been disclosed in writing to Summa which may
reasonably be expected to materially and adversely affect the business,
operations, properties, assets, condition (financial or other), and/or results
of operations of Calnetics or the ability of Calnetics to perform all of the
obligations to be performed by Calnetics under this Agreement and/or any other
agreement between Summa and Calnetics to be entered into pursuant to any
provision of this Agreement.

         7.   REPRESENTATIONS AND WARRANTIES OF SUMMA.

         Summa represents and warrants to Calnetics as follows (it being
acknowledged and agreed that Calnetics is entering into this Agreement in
material reliance upon each of the following representations and warranties):

              7.1 Organization and Corporate Power. Summa is a corporation duly
organized, validly existing and in good standing under the laws of the State of
California, and is duly qualified and in good standing to do business as a
foreign corporation in each jurisdiction in which such qualification is required
and where the failure to be so qualified would have a materially adverse effect
upon Summa. Summa has all requisite corporate power and authority to conduct its
business as now being conducted and to own and lease the properties which it now
owns and leases. The Articles of Incorporation, as amended to date,




                                  Page 53 of 77

<PAGE>   20
certified by the Secretary of State of California, and the Bylaws of Summa, as
amended to date, and the resolutions of Summa's Board of Directors authorizing
the execution, delivery and performance of this Agreement, all certified by the
Secretary of Summa, which have previously been provided to Calnetics by Summa,
are true and complete copies thereof as currently in effect. Subsidiary will be
organized prior to the Effective Time as a duly organized and validly existing
California corporation in good standing under the laws of the State of
California, all of whose capital stock will be issued to and owned, beneficially
and of record, by Summa.

              7.2 Capitalization. The authorized capital stock of Summa consists
of 10,000,000 shares of Summa Common Stock and 5,000,000 shares of preferred
stock, $.001 par value. As of the date hereof, there are 4,070,250 shares of
Summa Common Stock outstanding, and no shares of preferred stock have been
issued or are outstanding. In addition, there are currently outstanding options
and warrants to purchase from Summa an aggregate of 470,721 additional shares of
Summa Common Stock. Except expressly set forth hereinabove, there are no
warrants, options, calls, commitments or other rights to subscribe for or to
purchase from Summa any capital stock of Summa or any securities convertible
into or exchangeable for any shares of capital stock of Summa, or any other
securities or agreements pursuant to which Summa is or may become obligated to
issue any shares of its capital stock, nor is there outstanding any commitment,
obligation or agreement on the part of Summa to repurchase, redeem or otherwise
acquire any of the outstanding shares of its capital stock.

              7.3 Authorization; Government Approvals. Summa has full corporate
power and authority to enter into, execute and deliver this Agreement, to
execute all attendant documents and instruments necessary to consummate the
transactions herein contemplated, and to perform its obligations hereunder,
subject to receipt of the requisite approval of the Summa Shareholders. This
Agreement (and each and every other agreement, document and instrument to be
executed by Summa hereunder) has been effectively authorized by all necessary
action on the part of the Board of Directors of Summa, which authorizations
remain in full force and effect, has been duly executed and delivered by Summa,
and no other authorizations or proceedings on the part of Summa are required to
authorize this Agreement and/or the transactions contemplated hereby, except for
receipt of the requisite approval of the Summa Shareholders. This Agreement
constitutes the legal, valid and binding obligation of Summa, subject to receipt
of the requisite approval of the Summa Shareholders, enforceable with respect to
Summa in accordance with its terms, except as enforcement hereof may be limited
by bankruptcy, insolvency, reorganization, priority or other laws or court
decisions relating to or affecting generally the enforcement of creditors'
rights or affecting generally the availability of equitable remedies. Other than
in connection with the filing of the Agreement of Merger with the California
Secretary of State, proceedings with the Commission, and the proceedings
specified in Section 8.7 below, no authorization, consent or approval of any
public body or authority is necessary for the consummation by Summa of the
transactions contemplated by this Agreement.




                                  Page 54 of 77

<PAGE>   21
              7.4 No Conflicts. Except as disclosed on the Summa Disclosure
Schedule attached hereto as Exhibit F, neither the execution and delivery of
this Agreement, nor the consummation by Summa of any of the transactions
contemplated hereby, or compliance with any of the provisions hereof, will (i)
conflict with or result in a breach of, violation of, or default under any of
the terms, conditions, or provisions of any note, debenture, bond, mortgage,
indenture, license, lease, credit agreement or other agreement, document,
instrument or obligation (including, without limitation, any of Summa's charter
documents) to which Summa is a party or by which any of its assets or properties
may be bound, or (ii) violate any judgment, order, injunction, decree, statute,
rule or regulation applicable to Summa or any of its officers, directors,
employees, assets or properties, excluding from the foregoing clauses (i) and
(ii) any conflicts, breaches, violations or defaults that would not have a
materially adverse affect on Summa or materially impair Summa's ability to
consummate the transactions contemplated hereby, or for which Summa shall have
received before the Effective Time appropriate consents or waivers.

              7.5 Subsidiaries. Summa has no subsidiaries and no investments,
directly or indirectly, or other financial interest in any other corporation or
business organization, joint venture or partnership of any kind whatsoever
except as reflected in the Summa Financial Statements (defined in Section 7.6
below) or as shown on the Summa Disclosure Schedule. Prior to the Effective
Time, Subsidiary will be organized as a California corporation whose capital
stock is wholly-owned by Summa.

              7.6 Financial Statements. Attached hereto as Exhibit G are (i) the
audited consolidated financial statements of Summa for each of its fiscal years
ended August 31, 1994, 1995 and 1996 consisting of balance sheets as of such
dates, the related statements of income for the periods then ended, and the
notes thereto, certified by Arthur Andersen LLP, and (ii) the unaudited
consolidated financial statements of Summa as of and for the six months ended
February 28, 1997, consisting of the balance sheet as of such date (the "Summa
Balance Sheet"), the related statement of income for the period then ended, and
the respective notes thereto, in each case certified by the chief financial
officer of Summa. Such financial statements (and the notes related thereto) are
herein sometimes collectively referred to as the "Summa Financial Statements."
The Summa Financial Statements (i) are derived from the books and records of
Summa, which books and records have been consistently maintained in a manner
which reflects, and such books and records do fairly reflect in all material
respects, the assets and liabilities of Summa, (ii) fairly present in all
material respects the financial condition of Summa on the respective dates of
such statements and the results of its operations for the periods indicated,
except as may be disclosed in the notes thereto, and (iii) have been prepared in
all material respects in accordance with generally accepted accounting
principles consistently applied throughout the periods involved (except as
otherwise disclosed in the notes thereto).

              7.7 Absence of Undisclosed Liabilities. Except as and to the
extent reflected or reserved against in the Summa Balance Sheet, and as to
matters arising in the ordinary course of its business since the date of the
Summa Balance Sheet that are disclosed in the





                                  Page 55 of 77

<PAGE>   22
Summa Disclosure Schedule, Summa has no liability or obligation (whether
accrued, to become due, contingent or otherwise) which individually or in the
aggregate could have a materially adverse effect on the business, assets or
condition (financial or otherwise) of Summa.

              7.8 Absence of Certain Developments. Except as set forth in the
Summa Disclosure Schedule, since the date of the Summa Balance Sheet there has
been (i) no declaration, setting aside or payment of any dividend or other
distribution with respect to any capital stock of Summa, no redemption, purchase
or other acquisition of any shares of Summa's capital stock, and no split-up or
other recapitalization relative to any of such capital stock, nor any action
authorizing or obligating Summa to do any of the foregoing; (ii) no loss,
destruction or damage to any material property or asset of Summa, whether or not
insured; (iii) no acquisition or disposition of material assets (or any contract
or arrangement therefor) or any other material transaction by Summa, otherwise
than for fair value and in the ordinary course of business; (iv) no discharge or
satisfaction by Summa of any lien or encumbrance or payment of any material
obligation or liability (absolute or contingent) other than current liabilities
shown on the Summa Balance Sheet, or current liabilities incurred since the date
thereof in the ordinary course of business, (v) no sale, assignment or transfer
by Summa of any of its tangible or intangible assets including any security
interest or other encumbrance, or waiver by Summa of any rights of value which,
in any such case, is outside the ordinary course of business and material to the
business of Summa; (vi) no payment of any bonus to or change in the compensation
of any director, officer or employee, whether directly or by means of any bonus,
pension plan, contract or commitment; (vii) no write-off or material reduction
in the carrying value of any asset which is material to the business of Summa;
(viii) no disposition or lapse of rights as to any intangible property which is
material to the business of Summa; (ix) except for ordinary travel advances, no
loans or extensions of credit to shareholders, officers, directors or employees
of Summa; (x) no loss of a customer of or supplier to Summa the loss of which
could reasonably be expected to materially adversely affect Summa; (xi) no
agreement to do any of the things described in this Section 7.8; or (xii) no
materially adverse change in the condition (financial or otherwise) of Summa or
in its assets, liabilities, properties or business.

              7.9 Real Property. Set forth in the Summa Disclosure Schedule is a
complete and accurate description of each parcel of real property owned by or
leased to and occupied by Summa, and Summa neither owns or leases, nor occupies,
any other real property. Except as would be disclosed in a reasonably diligent
inspection, to Summa's Knowledge, the buildings and all fixtures and
improvements located on such real property are in good operating condition,
ordinary wear and tear excepted. To Summa's Knowledge, Summa is not in violation
of any zoning, building or safety ordinance, regulation or requirement or other
law or regulation applicable to the operation of owned or leased properties, the
violation of which could reasonably be expected to have a material adverse
affect upon Summa, its condition (financial or otherwise), assets, liabilities,
properties or business, and Summa has not received any notice of violation with
which it has not complied or is not taking steps to comply. Summa has good and
marketable title to all such real property owned by Summa, free and




                                  Page 56 of 77

<PAGE>   23
clear of all liens, mortgages, encumbrances, easements, leases, restrictions and
claims of any kind whatsoever except for (i) those matters shown on the Summa
Disclosure Schedule; (ii) liens for taxes for the current year and tax
assessments not yet due and payable; and (iii) mechanics' or similar liens for
materials or services furnished or to be furnished after the date hereof. All
leases of real property to which Summa is a party are fully effective in
accordance with their respective terms and afford Summa peaceful and undisturbed
possession of the subject matter of the lease, and there exists no material
default on the part of Summa or termination thereof, except as may be set forth
in the Summa Disclosure Schedule.

              7.10 Tangible Personal Property. Set forth in the Summa Disclosure
Schedule hereto is a complete list of all items of tangible personal property
(including without limitation all items of tooling) owned or leased and used by
Summa in the current conduct of its business, where the original cost was in
excess of $50,000. Except as set forth in the Summa Disclosure Schedule, Summa
has, and at the Effective Date will have, good and marketable title to, or in
the case of leased equipment a valid leasehold interest in, and is in possession
of, all such items of personal property owned or leased by it, free and clear of
all title defects, mortgages, pledges, security interests, conditional sales
agreements, liens, restrictions or encumbrances whatsoever. Included in the
Summa Disclosure Schedule is a list of all outstanding equipment leases and
maintenance agreements to which Summa is a party as lessee and which
individually provide for future lease payments in excess of $5,000 per month,
with the identities of the other parties to all such leases and agreements shown
thereon. All leases of tangible personal property to which Summa is a party and
which are material to the business of Summa are fully effective in accordance
with their respective terms, and there exists no material default on the part of
Summa or termination thereof, except as may be set forth in the Summa Disclosure
Schedule. Each item of capital equipment reflected in the Summa Balance Sheet
which is used in the current conduct of Summa's business is in good operating
and usable condition and repair, ordinary wear and tear excepted, and is
suitable for use in the ordinary course of Summa's business and fit for its
intended purposes, except as may be set forth in the Summa Disclosure Schedule.

              7.11 Tax Matters. Summa has, since its inception, duly filed and
timely all federal, state, county and local tax returns required to have been
filed by it in those jurisdictions where the nature or conduct of its business
required such filing and where the failure to so file would be materially
adverse to Summa. Copies of all tax returns for the past 3 years have been made
available for inspection by Calnetics prior to the execution hereof. All
federal, state, county and local taxes, including but not limited to those taxes
due with respect to Summa's properties, income, gross receipts, excise,
occupation, franchise, permit, licenses, sales, payroll, and inventory due and
payable as of the date of the Effective Date by Summa have been paid or validly
extended. The amount reflected in the Summa Balance Sheet as liabilities or
reserves for taxes which are due but not yet payable is sufficient for the
payment of all accrued and unpaid taxes of the types referred to hereinabove. No
consent to the application of Section 341(f)(2) of the Internal Revenue Code of
1986, as amended, has been filed with respect to Summa.




                                  Page 57 of 77

<PAGE>   24
              7.12 Accounts Receivable. The accounts receivable reflected in the
Summa Balance Sheet constituted all accounts receivable of Summa as of the date
thereof, other than accounts receivable fully written off as uncollectible as of
such date in accordance with consistently applied prior practice. All such
accounts receivable arose from valid sales made (as opposed to consignments) or
services rendered in the ordinary course of business, and are not subject to any
return privileges, set-off or counter-claim, except as disclosed on the Summa
Disclosure Schedule. Except as disclosed in the Summa Disclosure Schedule, such
accounts receivable have been collected in full since the date of the Summa
Balance Sheet or, to Summa's Knowledge, are collectible at their full respective
amounts (net of allowance for doubtful accounts established in accordance with
consistently applied prior practice). Based upon the prior experience of Summa,
the "allowance for doubtful accounts" shown on the Summa Balance Sheet is
sufficient to cover all doubtful accounts.

              7.13 Inventories. Summa has good and marketable title to all of
its inventories of raw materials, work-in-process and finished goods, including
models and samples, free and clear of all security interests, liens, claims and
encumbrances, except as set forth in the Summa Disclosure Schedule. All such
inventories consist of items that are usable and salable in the ordinary course
of business of Summa for an amount at least equal to the book value thereto,
plus the costs of disposition thereof, and represent quantities, individually
and in the aggregate, not in excess of one year's requirements for its business
as currently conducted, except as may be set forth in the Summa Disclosure
Schedule.

              7.14 Contracts and Commitments. Summa has no contract, agreement,
obligation or commitment, written or oral, expressed or implied, which involves
a commitment or liability in excess of $100,000 or for a term of more than one
year or whose terms do not permit cancellation without liability on 90 days'
notice or less (other than obligations which are included in accounts payable),
and no union contracts, employee or consulting contracts, financing agreements,
debtor or creditor arrangements, licenses, franchise, manufacturing,
distributorship or dealership agreements, leases, or bonus, health or stock
option plans, except as described in the Summa Disclosure Schedule, all of which
have been made available to Calnetics prior to the execution hereof. As of the
date hereof, to Summa's Knowledge, there exists no circumstances which would
affect the validity or enforceability of any of such contracts and other
agreements in accordance with their respective terms. Except as set forth in the
Summa Disclosure Schedule, Summa has performed and complied in all material
respects with all obligations required to be performed by it to date under, and
is not in default (without giving effect to any required notice or grace period)
under, or in breach of, the terms, conditions or provisions of any of such
contracts and other agreements. Except as set forth in the Summa Disclosure
Schedule, the validity and enforceability of any contract or other agreement
described herein has not been and shall not in any manner be affected by the
execution and delivery of this Agreement without any further action. Except as
set forth in the Summa Disclosure Schedule, Summa has no material contract,
agreement, obligation or commitment which requires or will require future
expenditures (including internal costs and overhead) in excess of reasonably
anticipated receipts, nor which is likely to be materially adverse to Summa's
business, assets or condition





                                  Page 58 of 77

<PAGE>   25
(financial and otherwise).

              7.15 Patents, Trade Secrets and Customer Lists. Except as set
forth on the Summa Disclosure Schedule, Summa does not have any patents,
applications for patents, trademarks, applications for trademarks, trade names,
licenses or service marks relating to the business of Summa, nor does any
present or former shareholder, officer, director or employee of Summa own any
patent rights relating to any products manufactured, rented or sold by Summa.
Except as set forth in the Summa Disclosure Schedule, to the Knowledge of Summa,
Summa has the unrestricted right to use, free and clear of any claims or rights
of others, all trade secrets, customer lists, manufacturing and secret
processes, trademarks, tradenames, brand names, licenses and service marks
reasonably necessary to the manufacture and marketing of all products made or
proposed to be made by Summa, and, to the Knowledge of Summa, the continued use
thereof by Summa following the Effective Date will not conflict with, infringe
upon, or otherwise violate any rights of others. To Summa's Knowledge, Summa has
not used and is not making use of any confidential information or trade secrets
of any present or past employee of Summa that has not been assigned to Summa or
that Summa does not have the right to use.

              7.16 No Pending Material Litigation or Proceedings. Except as set
forth in the Summa Disclosure Schedule, there are no actions, suits or
proceedings pending or, to Summa's Knowledge, threatened against or directly
affecting Summa (including actions, suits or proceedings where liabilities may
be adequately covered by insurance) at law or in equity or before or by any
federal, state, municipal or other governmental department, commission, court,
board, bureau, agency or instrumentality, domestic or foreign, or affecting any
of the shareholders, officers or directors of Summa in connection with the
business, operations or affairs of Summa, which could reasonably be expected to
result in any material adverse change in the business, properties or assets, or
in the condition (financial or otherwise) of Summa, or which question or
challenge the transaction contemplated hereby. Except as set forth in the Summa
Disclosure Schedule, to Summa's Knowledge, Summa has not, during the past three
years, been threatened with any action, suit, proceedings or claim (including
actions, suits, proceedings or claims where its liabilities may be adequately
covered by insurance) for personal injuries allegedly attributable to products
sold or services performed by Summa asserting a particular defect or hazardous
property in any of Summa's products, services or business practices or methods,
nor has Summa been a party to or threatened with proceedings brought by or
before any federal or state agency; and Summa has no Knowledge of any defect or
hazardous property, claimed or actual, in any such product, service, business
practice or method. Summa is not subject to any voluntary or involuntary
proceeding under the United States Bankruptcy Code and has not made an
assignment for the benefit of creditors.

              7.17 Insurance. Summa maintains insurance with reputable insurance
companies on such of its equipment, tools, machinery, inventory and properties
as are usually insured by companies similarly situated in the same geographic
location and to the extent customarily insured, and maintains products and
personal liability insurance, and such other insurance against hazards, risks
and liability to persons and property as is customary for companies




                                  Page 59 of 77

<PAGE>   26
similarly situated in the same geographic location. A true and complete listing
and general description of each of Summa's insurance policies as currently in
force, including all policies of group medical and/or dental insurance, is set
forth in the Summa Disclosure Schedule, copies of all of which have previously
made available to Calnetics. All such insurance policies are currently in full
force and effect.

              7.18 Arrangements with Personnel. Except as set forth in the Summa
Disclosure Schedule, no shareholder, director, officer or employee of Summa is
presently a party to any transaction with Summa, including without limitation
any contract, loan or other agreement or arrangement providing for the
furnishing of services by, the rental of real or personal property from or to,
or otherwise requiring loans or payments to, any such shareholder, director,
officer or employee, or to any member of the family of any of the foregoing, or,
to Summa's Knowledge, to any corporation, partnership, trust or other entity in
which any shareholder, director, officer or employee, or any member of the
family of any of them has a substantial interest or is an officer, director,
trustee, partner or employee. There is set forth in the Summa Disclosure
Schedule a list showing (i) the name, title, date and amount of last
compensation increase, and aggregate compensation, including amounts paid or
accrued pursuant to any bonus, pension, profit sharing, commission, deferred
compensation or other plans or arrangements in effect as of the date of this
Agreement, of each officer or employee of Summa whose salary and other
compensation, in the aggregate, received from Summa or accrued is at an annual
rate (or aggregated for the most recently completed fiscal year) in excess of
$100,000, as well as any employment and/or severance agreements relating to any
such persons; (ii) a description of any and all bonus, pension, profit sharing,
commission, deferred compensation or other plans or arrangements in effect for
any of Summa's employees as of the date of this Agreement; (iii) a description
of any noncompetition or similar agreements to which Summa or any shareholder,
director, officer or employee of Summa is a party; (iv) all powers of attorney
from Summa to any person or entity; and (v) the name of each person or entity
authorized to borrow money or incur or guarantee indebtedness on behalf of
Summa. Summa has made available to Calnetics copies of all written personnel
policies, including without limitation vacation, severance, bonus, pension,
profit sharing and commission policies, applicable to any of Summa's employees.
Neither the execution and delivery of this Agreement by Summa, nor the
consummation by Summa of any of the transactions contemplated hereby, or
compliance by Summa with any of the provisions hereof, shall create any
obligation or liability on the part of Summa under any bonus, profit sharing,
deferred compensation of other plan or arrangement in effect as of the date of
this Agreement.

              7.19 Labor Relations. Except as set forth in the Summa Disclosure
Schedule, Summa has never been a party to any collective bargaining agreement or
other contract with a labor union, nor, to Summa's Knowledge, is any union,
labor organization or group of employees of Summa presently seeking the right to
enter into collective bargaining with Summa on behalf of any of its employees.

              7.20 Bank Accounts. All bank and savings accounts, and other
accounts at similar financial institutions, of Summa are listed in the Summa
Disclosure Schedule, and




                                  Page 60 of 77

<PAGE>   27
copies of all signature cards or other documentation reflecting all individuals
who are authorized to withdraw funds from any such accounts have been made
available to Calnetics.

              7.21 Absence of Questionable Payments. Neither Summa nor, to
Summa's Knowledge, any shareholder, director, officer, agent, employee,
consultant or other person associated with or acting on behalf of any of them,
has (i) used any corporate funds for unlawful contributions, gifts,
entertainment or other unlawful expenses relating to political activity, (ii)
made any direct or indirect unlawful payments to governmental officials or
others from corporate funds, engaged in any payments or activity which would be
deemed a violation of the Foreign Corrupt Practices Act or rules or regulations
promulgated thereunder, or (iii) established or maintained any unlawful or
unrecorded accounts.

              7.22 Compliance with Laws. Summa holds all licenses, franchises,
permits and authorizations necessary for the lawful conduct of its business as
presently conducted, has complied with all applicable statutes, laws,
ordinances, rules and regulations of all governmental bodies, agencies and
subdivisions having, asserting or claiming jurisdiction over it, with respect to
any part of the conduct of its business and corporate affairs, where the failure
to so hold or comply could reasonably be expected to have a material adverse
affect upon Summa's condition (financial or otherwise), business, assets or
properties.

              7.23    Environmental Matters.

                  (a) To the Knowledge of Summa, except as set forth on the
Summa Disclosure Schedule:

                      (i) Summa has complied with all applicable Environmental
Laws;

                      (ii) Summa's Property (including soils, groundwater,
surface water, buildings or other structures) is not contaminated with any
Hazardous Substances that may subject Summa to liability under any Environmental
Law;

                      (iii) the properties formerly owned or operated by Summa
were not contaminated with Hazardous Substances during the period of ownership
or operation by Summa that may subject Summa to liability under any
Environmental Law;

                      (iv) Summa is not subject to liability under any
Environmental Law for any Hazardous Substance disposal or contamination on any
third party property;

                      (v) Summa has not been associated with any release or
threat of release of any Hazardous Substance that may subject Summa to liability
under any Environmental Law;

                      (vi) Summa has not received any notice, demand, letter,
claim or request for information alleging that Summa may be in violation of, or
liable under, any Environmental Law;





                                  Page 61 of 77

<PAGE>   28
                      (vii) Summa is not subject to any orders, decrees,
injunctions or other arrangements with any governmental entity, nor is subject
to any indemnity or other agreement with any third party relating to liability
under any Environmental Law or relating to Hazardous Substances;

                      (viii) there are no circumstances or conditions involving
Summa that could reasonably be expected to result in any claims, liability,
investigations, costs or restrictions on the ownership, use or transfer of any
of Summa's Property pursuant to any Environmental Law; and

                      (ix) Summa's Property does not contain any underground
storage tanks, asbestos-containing material, lead-based products, or
polychlorinated biphenyls.

              7.24 Relationships with Customers and Suppliers. Except as may be
set forth on the Summa Disclosure Schedule, no present customer or substantial
supplier to Summa has indicated an intention to terminate or materially and
adversely alter its existing business relationship therewith, and Summa has no
reason to believe that any of the present customers of or substantial suppliers
to Summa intends to do so, other than, in each such case, any customer or
substantial supplier the loss of which could not reasonably be expected to
materially adversely affect Summa.

              7.25 Brokerage. Except as set forth in the Summa Disclosure
Schedule, Summa has no obligation to any person or entity for brokerage
commissions, finder's fees or similar compensation in connection with the
transactions contemplated by this Agreement.

              7.26 Reports Under the Exchange Act. The Summa Common Stock is
registered under Section 12(g) of the Exchange Act. Accordingly, Summa is
subject to the information requirements of the Exchange Act, and in accordance
therewith files reports and other information with the Commission. Since January
1, 1992, Summa has filed with the Commission on a timely basis all such reports
which Summa has been required to file under the Exchange Act. Summa has made
available to Calnetics accurate and complete copies of each registration
statement, report, proxy statement, information statement or schedule, together
with all amendments thereto, that were required to be filed with the SEC by
Summa since January 1, 1992 (the "Summa SEC Documents"). As of their respective
dates, the Summa SEC Documents complied in all material respects with the
applicable requirements of the Securities Act and the Exchange Act, as the case
may be, and none of the Summa SEC Documents contained any untrue statement of a
material fact or omitted to state a material fact required to be stated therein
or necessary to make the statements therein, in light of the circumstances under
which they were or are made, not misleading.

              7.27 Disclosure. Neither this Agreement, nor any certificate,
exhibit, or other written document or statement, furnished to Calnetics by or on
behalf of Summa in connection with the transactions contemplated by this
Agreement contained or contains any untrue statement of a material fact or
omitted or omits to state a material fact necessary to be stated





                                  Page 62 of 77

<PAGE>   29
in order to make the statements contained herein or therein, in the light of the
circumstances in which they were made, not misleading. Summa has no Knowledge of
any fact which has not been disclosed in writing to Calnetics which may
reasonably be expected to materially and adversely affect the business,
properties, assets, condition (financial or other) and/or results of operations
of Summa or the ability of Summa to perform all of the obligations to be
performed by Summa under this Agreement and/or any other agreement between Summa
and Calnetics to be entered into pursuant to any provision of this Agreement.

              7.28 Financing. Summa shall use its best efforts to obtain the
funds required to make full payment of the cash portion of the Merger
consideration as contemplated herein.


         8.   COVENANTS OF THE PARTIES PRIOR TO THE EFFECTIVE DATE.

         Each of Calnetics and Summa hereby covenants to and agrees with the
other that between the date hereof and the Effective Date:

              8.1 Access to Properties and Records. Each party shall give to the
other and its authorized representatives full access, during reasonable business
hours, in such a manner as not unduly to disrupt normal business activities, to
any and all of its premises, properties, contracts, books, records and affairs,
and will cause its senior officers to furnish any and all data and information
pertaining to its business that the other may from time to time reasonably
require. Unless and until the transactions contemplated by this Agreement have
been consummated, each party and its representatives shall hold in confidence
all information so obtained and will use such information solely for the
purposes intended by this Agreement. If the transactions contemplated hereby are
not consummated, each party will return all documents (and copies thereof)
hereinabove referred to and obtained therefrom. Such obligation of
confidentiality shall not extend to any information which is shown to have been
previously (i) known to the party receiving it, (ii) generally known to others
engaged in the trade or business of the disclosing party, (iii) part of public
knowledge or literature without breach of a duty of confidentiality, or (iv)
lawfully received from a third party. Without limiting the generality of the
foregoing, it is understood and agreed that certain information disclosed by
each party to the other, or their respective representatives, may constitute
"material inside information" that has not previously been disclosed to the
public generally. Each party acknowledges that it and its representatives are
aware of the restrictions on the use of such information imposed by federal and
state securities laws, agrees to comply and cause its representatives to comply
with such restrictions, and agrees to indemnify and hold the other party and
each of its directors, officers and employees free and harmless from any and all
liability, cost or expense that any of them may incur or suffer by reason of any
breach by the indemnifying party or any of its authorized representatives of any
of such restrictions. From and after the date hereof and until the Closing or
termination hereof, neither party, nor any of their respective officers,
directors, principal shareholders or other representatives, shall purchase or
sell, directly or indirectly, in the public marketplace or otherwise, any
securities of the other party.




                                  Page 63 of 77

<PAGE>   30
              8.2 Corporate Existence, Rights and Franchises. Each party shall
take all necessary actions to maintain in full force and effect its corporate
existence, rights, franchises and good standing. No change shall be made to the
Articles of Incorporation or Bylaws of either party.

              8.3 Insurance. Each party shall take all necessary actions to
maintain in force all of its existing insurance policies (or replacements
therefor), subject only to variations in amounts required by the ordinary
operation of its business.

              8.4 Conduct of Business in the Ordinary Course. Except as
otherwise expressly provided in this Agreement, neither party shall permit to be
done any act which would result in a material breach of any of the covenants of
such party contained herein or which would cause the representations and
warranties of such party contained herein to become untrue or inaccurate in any
material respect as of any date subsequent to the date hereof. Without limiting
the generality of the foregoing, each party shall take all reasonably necessary
actions to (i) operate its business diligently in the ordinary course of
business as an ongoing concern, and will use its best business efforts to
preserve intact its organization and operations at current levels and to make
available to the Surviving Corporation the services of Calnetics' present
employees and to preserve for the Surviving Corporation the relationships of
Calnetics with its suppliers and customers and others having business
relationships with it; (ii) maintain in good operating condition, ordinary wear
and tear excepted, all of its assets and properties which are in such condition
as of the date hereof; (iii) maintain its books, accounts and records in the
usual, regular and ordinary manner, on a basis consistent with past practice in
recent periods; (iv) refrain from entering into any contract, agreement, lease,
acquisition, sale of assets, capital expenditure or other commitment of a value
in excess of $250,000 (other than purchases and sales of inventory, including
sales orders, in the ordinary course of business), or from modifying, amending,
canceling or terminating any of such contracts, agreements, leases or other
commitments presently in force, except as expressly contemplated by this
Agreement, without the prior approval of the other party (which approval shall
not be unreasonably withheld and which may be verbal to be promptly followed by
written confirmation); (v) refrain from paying any bonus to any officer or
director, other than pursuant to any contract, agreement or arrangement existing
on the date of this Agreement, or any employee other than on a basis consistent
with past practice, and from declaring or paying any dividend, or making any
other distribution in respect of, or from redeeming, any of its capital stock;
and (vi) refrain from issuing any capital stock or other securities convertible
into or exercisable to purchase capital stock other than upon exercise of
existing options.

              8.5 Consents. Each of the parties shall use its best business
efforts to obtain any and all necessary permits, approvals, qualifications,
consents or authorizations from third parties and governmental authorities which
are required to be obtained prior to the Effective Date, and shall use its best
efforts to make or complete all filings, proceedings and waiting periods
required to be made or completed prior to the Effective Date.






                                  Page 64 of 77

<PAGE>   31
              8.6 Approval of Calnetics Shareholders. A special meeting of the
Calnetics Shareholders shall be called to be held in accordance with the
California Corporations Code on or before May 29, 1997, or as soon thereafter as
is practicable, at a time, place and date to be set by the Calnetics Board of
Directors, for the purposes of considering and voting upon a proposal to approve
this Agreement and the transactions contemplated hereby. The Calnetics Board of
Directors shall recommend that the Calnetics Shareholders approve this Agreement
and the transactions contemplated hereby. By signing this Agreement where
indicated on the signature page hereof, each shareholder of Calnetics who owns
or has voting control over 10% or more of the Common Stock of Calnetics issued
and outstanding as of the date hereof has agreed (subject to the terms and
conditions of this Agreement) to vote all such shares in favor of the
transactions contemplated hereby at the special meeting of Calnetics
Shareholders. Calnetics shall prepare and mail, or cause to be prepared and
mailed to the Calnetics Shareholders, at least 30 days prior to the special
meeting, appropriate notice of the meeting, together with a copy of the Joint
Proxy Statement/Prospectus prepared as provided in Section 8.8 below.

              8.7 Approval of Summa Shareholders. A special meeting of the Summa
Shareholders shall be called to be held in accordance with the California
Corporations Code on or before May 29, 1997, or as soon thereafter as is
practicable, at a time, place and date to be set by the Summa Board of
Directors, for the purposes of considering and voting upon a proposal to approve
this Agreement and the transactions contemplated hereby. The Summa Board of
Directors shall recommend that the Summa Shareholders approve this Agreement and
the transactions contemplated hereby. Summa shall prepare and mail, or cause to
be prepared and mailed to the Summa Shareholders, at least 30 days prior to the
special meeting, an appropriate notice of the meeting, together with a copy of
the Joint Proxy Statement/Prospectus in Section 8.8 below.

              8.8     Registration Statement and Proxy Statement.

                  (a) Summa and Calnetics shall cooperate in preparing the
Registration Statement (including any amendments or supplements thereto) and the
Joint Proxy Statement/Prospectus to be included therein and each shall furnish
to the other for inclusion therein all such information relating to it as the
other party or its counsel reasonably requests. Summa shall file the
Registration Statement with the Commission promptly after completion, and Summa
and Calnetics shall use all reasonable efforts to respond to any comments of the
Commission staff and to have the Registration Statement declared effective as
promptly as practicable and, thereafter, to maintain such effectiveness through
the Effective Time. Summa agrees to provide to Calnetics the opportunity to
review and comment on the Registration Statement, each amendment or supplement
to the Registration Statement, each responsive correspondence to be sent to the
Commission, and each form of the Joint Proxy Statement/Prospectus within a
reasonable time before filing, and agrees not to file any such documents without
Calnetics' consent. Summa shall (i) include in the Registration Statement and
each amendment and supplement information relating to Calnetics, its business
and financial condition only as authorized by Calnetics, and (ii) promptly
provide to Calnetics





                                  Page 65 of 77

<PAGE>   32
copies of all correspondence received from the Commission with respect to the
Registration Statement and its amendments or supplements and copies of all
responsive correspondence to the Commission. Summa agrees to notify Calnetics of
any stop orders or threatened stop orders with respect to the Registration
Statement. The Joint Proxy Statement/Prospectus may be filed with the Commission
as confidential preliminary proxy material under Regulation 14A of the Exchange
Act.

                  (b) Calnetics and Summa shall not furnish to their respective
shareholders any proxy materials relating to this Agreement or the Merger until
the Registration Statement has become effective. Calnetics and Summa each shall
mail to its shareholders (i) as promptly as practicable after the Registration
Statement becomes effective, the Joint Proxy Statement/Prospectus (the date of
such mailing hereinafter being referred to as the "Mailing Date"), (ii) as
promptly as practicable after receipt thereof, any supplemental or amended Joint
Proxy Statement/Prospectus, and (iii) such other supplementary proxy materials
as may be necessary, in light of the circumstances arising after the mailing of
the Joint Proxy Statement/Prospectus, to make the Joint Proxy
Statement/Prospectus, as theretofore supplemented or amended, complete and
correct. The Joint Proxy Statement/Prospectus and all amendments and supplements
thereto shall comply with applicable law and shall be in form and substance
satisfactory to Summa and Calnetics.

                  (c) Summa and Calnetics each shall advise the other if, at any
time before the effective date of the Registration Statement, the date of the
special meeting of Calnetics Shareholders to be held pursuant to Section 8.6
hereof, the date of the special meeting of Summa Shareholders to be held
pursuant to Section 8.7 hereof, or the Effective Time, the Registration
Statement or the Joint Proxy Statement/Prospectus contains an untrue statement
of a material fact or omits to state a material fact required to be stated
therein or necessary to make the statements contained therein, in the light of
the circumstances under which they were made, not misleading. In such event,
Summa or Calnetics, as the case may be, shall provide the other with the
information needed to correct such misstatement or omission.

              8.9 Fairness Opinions. Each party hereto may, but shall not be
obligated to, obtain on or before March 31, 1997 (with a written update to be
received on or before the mailing date of the Joint Proxy Statement/Prospectus),
at its sole cost and expense, a third-party opinion as to the fairness of the
transactions contemplated hereby from a financial point of view to the
shareholders of the party obtaining such opinion. Should such opinion not be
reasonably acceptable to the party obtaining it, such party may terminate the
transactions contemplated hereby without further liability or obligation to the
other except as provided in Section 13.2 hereof.

              8.10 Tax Opinion. Calnetics may, but shall not be obligated to,
obtain on or before March 31, 1997 (with a written update to be received on or
before the Effective Date), at its sole cost and expense, a favorable tax
opinion of its counsel, Gibson, Dunn & Crutcher LLP. Should such opinion not be
reasonably acceptable to Calnetics, Calnetics may terminate the transactions
contemplated hereby without further liability or obligation to Summa except




                                  Page 66 of 77

<PAGE>   33
as provided in Section 13.2 hereof.

              8.11 No Equitable Conversion. Prior to the Effective Time, neither
the execution of this Agreement nor the performance of any provision contained
herein shall cause either Summa, on the one hand, or Calnetics, on the other
hand, to be or become liable for or in respect of the operations or business of
the other, for the cost of any labor or materials furnished to or purchased by
the other, for compliance with any laws, requirements or regulations of, or
taxes, assessments or other charges now or hereafter due to, any governmental
authority, or for any other charges or expenses whatsoever pertaining to the
conduct of the business or the ownership, title, possession, use or occupancy of
the property of the other.

              8.12    Standstill Agreements.

                  (a) Prior to the Effective Time, unless this Agreement is
sooner terminated as expressly provided herein, neither party shall initiate,
directly or indirectly, any possible business combination, sale of assets or
stock, or other transaction which is inconsistent with the transactions
contemplated thereby. Notwithstanding the foregoing, either party may respond to
third party inquiries subject to the provisions set forth in Section 13.1.8
hereof.

                  (b) If this Agreement is terminated by either party, then for
a period of two (2) full years from the date of such termination, neither party
shall, directly or indirectly, except as may expressly be permitted in writing
by the other party: (i) acquire or agree, offer, seek or propose to acquire, or
cause to be acquired, ownership of any of the assets or businesses or voting
securities of the other party, or any other rights or options to acquire any
such ownership (including from a third party); (ii) seek or propose to influence
or control the management or policies of the other party; or (iii) enter into
any discussions, negotiations, arrangements or understandings with any third
party with respect to any of the foregoing.

         9.   CONDITIONS TO THE OBLIGATIONS OF EACH PARTY.

         The respective obligations of the parties hereto to consummate the
transactions contemplated hereby shall be subject to the fulfillment, at or
prior to the Effective Date, of the following conditions:

              9.1 Regulatory Approvals. There shall have been obtained any and
all permits, approvals and qualifications of, and there shall have been made or
completed all filings, proceedings and waiting periods, required by any
governmental body, agency or regulatory authority which, in the reasonable
opinion of counsel to the parties, are required for the consummation of the
transactions contemplated hereby.

              9.2 No Action or Proceeding. No claim, action, suit, investigation
or other proceeding shall be pending or threatened before any court or
governmental agency, and no statute, rule or regulation shall have enacted or
entered by a governmental body of competent jurisdiction, which presents a
substantial risk of the restraint or prohibition of the transactions





                                  Page 67 of 77

<PAGE>   34
contemplated by this Agreement or the obtaining of material damages or other
relief in connection therewith.

              9.3 Tax Matters. Nothing shall have come to the attention of
either party which has led such party reasonably to believe that the Merger will
not qualify as a tax-free reorganization under Section 368 of the Code.

              9.4 Dissenters' Rights. The number of shares of either Calnetics
Common Stock or Summa Common Stock which constitute "Perfected Dissenting
Shares" as defined in Section 3.4 hereof does not exceed five percent (5%) of
the total number of shares of Calnetics Common Stock or Summa Common Stock, as
the case may be, outstanding on the respective record dates of the meetings of
the Calnetics Shareholders and the Summa Shareholders referred to in Sections
4.1 and 4.2.

         10.      CONDITIONS PRECEDENT TO OBLIGATIONS OF SUMMA AND SUBSIDIARY.

              The obligation of each of Summa and Subsidiary to consummate the
Merger is expressly subject to the satisfaction, on or before the Effective
Date, of each of the further conditions set forth below, any or all of which may
be waived by Summa in whole or in part without prior notice; provided, however,
that no such waiver of a condition shall constitute a waiver by Summa or
Subsidiary of any other condition or of any of its rights or remedies, at law or
in equity, if Calnetics shall be in default or breach any of the
representations, warranties or covenants of Calnetics under this Agreement:

              10.1 Shareholder Approvals. The Summa Shareholders and the
Calnetics Shareholders shall have approved by the requisite vote the adoption of
this Agreement and the transactions contemplated hereby.

              10.2 Proceedings. All corporate and other proceedings taken or to
be taken by Calnetics or any governmental authority in connection with the
transactions contemplated hereby to be consummated at the Effective Date and all
documents incident thereto or required to be delivered prior or at closing will
be reasonably satisfactory in form and substance to Summa and its counsel as may
be required to consummate the transactions contemplated hereby.

              10.3 Performance of Agreement; Accuracy of Representations and
Warranties. Calnetics shall have performed in all material respects the
agreements and covenants required to be performed by Calnetics under this
Agreement prior to or on the Effective Date, there shall have been no material
adverse change in the condition (financial or otherwise), assets, liabilities,
earnings or business of Calnetics since the date hereof, and the representations
and warranties of Calnetics contained herein shall, except as contemplated or
permitted by this Agreement or as qualified in a writing dated as of the
Effective Date and delivered by Calnetics to Summa with the approval of Summa
indicated thereon (which writing is to be





                                  Page 68 of 77

<PAGE>   35
attached hereto as Exhibit H), be true in all material respects on and as of the
Effective Date as if made on and as of such date, and Summa shall have received
a certificate, dated as of the Effective Date, signed by the President and Chief
Financial Officer of Calnetics, on behalf of Calnetics, reasonably satisfactory
to Summa and its counsel, to such effect.

              10.4 Opinion of Counsel of Calnetics Summa and its counsel shall
have received an opinion dated as of the Effective Date from Gibson, Dunn &
Crutcher LLP, counsel to Calnetics, in form and substance reasonably
satisfactory to Summa and its counsel, substantially to the effect that:

                  10.4.1 Calnetics is a duly incorporated and validly existing
corporation in good standing under the laws of California, and has the corporate
power to enter into this Agreement and consummate the transactions herein;

                  10.4.2 This Agreement and the Agreement of Merger have been
duly authorized, executed and delivered by Calnetics and each constitutes the
legal, valid and binding obligation of Calnetics, except as the same may be
limited by bankruptcy, insolvency or other similar laws relating to or affecting
the enforcement of creditors' rights or by general principles of equity, whether
considered in a proceeding at law or in equity;

                  10.4.3 To the best of such counsel's Knowledge, to the extent
that the approval or consent of any governmental agency or body is required for
the legal and valid execution and delivery of this Agreement or the performance
of any obligation of Calnetics under any provision hereof, such consent has been
validly procured; and

                  10.4.4 Neither the execution of this Agreement nor the
performance by Calnetics of any of its obligations hereunder will violate the
Certificate of Incorporation or the Bylaws of Calnetics.

              10.5 Accuracy of Information in Joint Proxy Statement/Prospectus.
None of the information which shall have been furnished by or on behalf of
Calnetics or its management for inclusion in the Joint Proxy
Statement/Prospectus shall contain any untrue statement of a material fact or
omit to state any material fact required to be stated therein or necessary in
order to make the statements therein, in light of the circumstances under which
they are made, not misleading.

              10.6 Exchange of Calnetics Options. Each holder of outstanding
Options shall have entered into a written agreement with Calnetics to surrender
for cancellation all such Options owned beneficially and of record by such
holder effective as of the Effective Time on terms and conditions set forth
therein, in consideration of the execution by each such holder of a standard
Summa "incentive" or "nonstatutory" stock option agreement, as the case may be
(the form of each of which has been provided to Calnetics prior to the execution
and delivery hereof), with Summa effective as of the Effective Time, pursuant to
which such holders would be entitled to purchase shares of Summa Common Stock on
the basis set forth in Section




                                  Page 69 of 77

<PAGE>   36
3.1.2 above.

              10.7 Fairness Opinion. If a "fairness opinion" has been provided
to the Board of Directors of Summa as provided in Section 8.9 hereof, such
opinion subsequently shall not have been withdrawn.

              10.8 Consents. Calnetics shall have been obtained any and all
approvals, consents or authorizations of third parties which, in the opinion of
counsel Summa, are reasonably required for the consummation of the transactions
contemplated hereby.

         11.      CONDITIONS PRECEDENT TO CALNETICS' OBLIGATIONS.

         Calnetics' obligation to consummate the Merger is expressly subject to
the satisfaction, on or before the Effective Date, of each of the further
conditions set forth below, any or all of which may be waived by Calnetics in
whole or in part without prior notice; provided, however, that no such waiver of
a condition shall constitute a waiver by Calnetics of any other condition or of
any of its rights or remedies, at law or in equity, if Summa shall be in default
or breach any of the representations, warranties or covenants of Summa under
this Agreement:

              11.1 Shareholder Approval. The Calnetics Shareholders and the
Summa Shareholders shall have approved by the requisite vote the adoption of
this Agreement and the transactions contemplated hereby.

              11.2 Proceedings. All corporate and other proceedings taken or to
be taken by Summa or any governmental authority in connection with the
transactions contemplated hereby to be consummated at the Effective Date and all
documents incident thereto or required to be delivered prior or at closing will
be satisfactory in form and substance to Calnetics and its counsel (including
but not limited to, the recordation of the Agreement of Merger) as may be
required to consummate the transactions contemplated hereby.

              11.3 Performance of Agreement; Accuracy of Representations and
Warranties. Summa shall have performed the agreements and covenants required to
be performed by Summa under this Agreement prior to or on the Effective Date,
there shall have been no material adverse change in the condition (financial or
otherwise), assets, liabilities, earnings or business of Summa since the date
hereof, and the representations and warranties of Summa contained herein shall,
except as contemplated or permitted by this Agreement or as qualified in a
writing dated as of the Effective Date and delivered by Summa to Calnetics with
the approval of Calnetics indicated thereon (which writing is to be attached
hereto as Exhibit J), be true in all material respects on and as of the
Effective Date as if made on and as of such date, and Calnetics shall have
received a certificate, dated as of the Effective Date, signed by the President
and Chief Financial Officer of Summa, on behalf of Summa, reasonably
satisfactory to Calnetics and its counsel, to such effect.

              11.4 Opinion of Counsel for Summa. Calnetics and its counsel shall
have





                                  Page 70 of 77

<PAGE>   37
received an opinion, dated as of the Effective Date, from Phillips & Haddan,
counsel to Summa, in form and substance reasonably satisfactory to Calnetics and
its counsel, substantially to the effect that:

                  11.4.1 Each of Summa and Subsidiary is a duly incorporated and
validly existing corporation in good standing under the laws of California, and
has the corporate power to enter into this Agreement and consummate the
transactions herein;

                  11.4.2 This Agreement and the Agreement of Merger have been
duly authorized, executed and delivered by Summa and each constitutes the legal,
valid and binding obligation of each of Summa and Subsidiary, except as the same
may be limited by bankruptcy, insolvency or other similar laws relating to or
affecting the enforcement of creditors rights or by general principles of
equity, whether considered in a proceeding at law or in equity;

                  11.4.3 The issuance of Summa Common Stock and Debentures to be
issued as a consequence of the Merger (including all of the shares of Summa
Common Stock issuable upon conversion of the Debentures and exercise of stock
options exchanged as provided in Section 10.6 above) has been duly authorized by
all necessary corporate action on the part of Summa; and that all of such shares
of Summa Common Stock, when issued as a consequence of the Merger or upon
conversion of the Debentures or exercise of stock options, as the case may be,
as provided in this Agreement will be validly issued, fully paid and
nonassessable under the laws of the State of California;

                  11.4.4 To the best of such counsel's Knowledge, to the extent
that the approval or consent of any governmental agency or body is required for
the legal and valid execution and delivery by Summa of this Agreement, the
issuance of Summa Common Stock and Debentures, or the performance of any
obligation of Summa or Subsidiary under any provision hereof, such consent has
been validly procured;

                  11.4.5 Neither the execution of this Agreement or the
performance by either Summa or Subsidiary of any of its obligations hereunder,
will violate the Articles of Incorporation or the Bylaws of either Summa or
Subsidiary; and

                  11.4.6 The Registration Statement has become effective under
the Act and, to counsel's Knowledge, no stop order suspending its effectiveness
has been issued and no proceedings for that purpose are pending before or are
contemplated by the Commission.

              11.5 Registration of Shares and Debentures. All shares of Summa
Common Stock and Debentures issuable to Calnetics Shareholders as a consequence
of the Merger (including all shares of Summa Common Stock issuable upon
conversion of the Debentures and upon exercise of stock options exchanged as
provided in Section 10.6 above) shall have been duly registered under the
Securities Act pursuant to the provisions of Section 12 hereof, and such
registration shall be effective and no stop order shall have been issued.





                                  Page 71 of 77

<PAGE>   38
              11.6 Accuracy of Information in Joint Proxy Statement/Prospectus.
None of the information which shall have been furnished by or on behalf of Summa
or its management for inclusion in the Joint Proxy Statement/Prospectus shall
contain any untrue statement of a material fact or omit to state any material
fact required to be stated therein or necessary in order to make the statements
therein, in light of the circumstances under which they are made, not
misleading.

              11.7 Composition of Summa's Board of Directors. Messrs. Clinton G.
Gerlach, Fred E. Edward and Peter H. Griffith shall have been elected to the
Board of Directors of Summa (one of whom shall be elected to each of the three
classes of Summa directors), effective as of the Effective Time, to serve in
such capacity from and after the Effective Time, along with Messrs. Swartwout
and five other current members of Summa's Board of Directors to be designated in
the Joint Proxy Statement/Prospectus, until changed in accordance with
applicable law and the Articles of Incorporation and Bylaws of Summa.

              11.8 Nasdaq Listing. The shares of Summa Common Stock to be issued
to the Calnetics Shareholders in connection with the Merger shall have been
listed on The Nasdaq National Market.

              11.9 Consents. Summa shall have been obtained any and all
approvals, consents or authorizations of third parties which, in the opinion of
counsel Calnetics, are reasonably required for the consummation of the
transactions contemplated hereby.

              11.10 Fairness Opinion; Tax Opinion. If a "fairness opinion" has
been provided to the Board of Directors of Calnetics as provided in Section 8.9
hereof, such opinion subsequently shall not have been withdrawn. If a "tax
opinion" has been provided to the Board of Directors of Calnetics as provided in
Section 8.10 hereof, the updated written opinion effective as of the Effective
Date specified therein shall have been received.

              11.11 Registration Rights Agreements. Summa shall have entered
into a Registration Rights Agreement in the Form attached as Exhibit I hereto
with each former shareholder of Calnetics who will receive shares of Summa
Common Stock as a consequence of the Merger (including shares issuable upon
conversion of Debentures and upon exercise of stock options) which, in the
aggregate, will represent 10% or more of the number of shares of Summa's Common
Stock outstanding immediately following the Merger.

         12.      REGISTRATION OF SHARES AND DEBENTURES.

              Summa shall use its best efforts, with the cooperation and
participation of Calnetics as provided in Section 8.8 hereof, to cause all of
the shares of Summa Common Stock and Debentures issuable to the Calnetics
Shareholders as a consequence of the Merger (including the shares of Summa
Common Stock issuable upon conversion of the Debentures and upon exercise of
options exchanged as provided in Section 10.6 above) to be duly registered under
the Securities Act, and qualified under the Blue Sky laws of each state with





                                  Page 72 of 77

<PAGE>   39
jurisdiction over the transaction, as same may be required. Such registration
under the Securities Act shall be effected pursuant to the Registration
Statement which shall become and remain effective under the Securities Act prior
to or as of the Effective Date, and shall remain effective thereafter as to the
shares of Summa Common Stock issuable upon conversion of the Debentures and upon
exercise of options exchanged as provided in Section 10.6 above for not less
than the respective terms of the Debentures and the options. In the case of
those Calnetics Shareholders who are not or do not become "Affiliates," as that
term is defined in Rule 405, the shares of Summa Common Stock to be received by
them as a consequence of the Merger will not require further registration. As
provided in Section 11.8 hereof, Summa shall take all necessary actions to
obtain the listing of the Summa Common Stock to be issued in connection with the
Merger (including the shares issuable upon conversion of the Debentures and upon
exercise of the options exchanged as provided in Section 10.6 above) on The
Nasdaq National Market.

         13.      TERMINATION, AMENDMENT AND WAIVER.

              13.1 Termination. This Agreement may be terminated at any time
prior to the Effective Date, whether before or after approval by either or both
of the Summa Shareholders or the Calnetics Shareholders:

                  13.1.1 By mutual written consent of Calnetics and Summa;

                  13.1.2 Unilaterally by either Calnetics or Summa at any time
on or before April 30, 1997, if as a result of its due diligence the terminating
party has determined, in its sole discretion, not to proceed with the
transactions contemplated hereby;

                  13.1.3 By either Calnetics or Summa, if the Merger shall not
have been consummated on or before August 31,1997 (the "Termination Date"),
except that the right to terminate under this Section 13.1.2 shall not be
available to any party whose failure to perform any covenant herein or satisfy
any condition hereof within the reasonable control of such party has been the
proximate cause of or resulted in the failure of the Merger to be consummated on
or before the Termination Date;

                  13.1.4 Unilaterally by either Calnetics or Summa (i) if the
other fails to perform any covenant in any material respect in this Agreement,
unless the failure is capable of being and has been cured in all material
respects within 30 business days after the terminating party has delivered
written notice of the alleged failure, or (ii) if any condition to the
obligations of that party is not satisfied (other than by reason of a breach by
that party of its obligations hereunder), and it reasonably appears that the
condition cannot be satisfied prior to the Termination Date, unless the party
has earlier waived such condition;

                  13.1.5 By either Calnetics or Summa if any of the conditions
to such party's performance remain unsatisfied for a period of 40 days after the
Commission shall have indicated its willingness to accelerate the effectiveness
of the Registration Statement to be





                                  Page 73 of 77

<PAGE>   40
filed by Summa as provided in Section 12 hereof;

                  13.1.6 By either party as provided in Section 8.9 hereof;

                  13.1.7 By Calnetics as provided in Section 8.10 hereof; and

                  13.1.8 By either party, upon the payment by the terminating
party to the other of the sum of $500,000 should the Board of Directors of such
party determine to enter into an inconsistent transaction with a third party.

              13.2 Effect of Termination. In the event of termination of this
Agreement by either Summa or Calnetics as provided in Section 13.1, this
Agreement shall forthwith become void and there shall be no further obligation
on the part of either Calnetics or Summa, or their respective officers or
directors (except as set forth in this Section 13.2 and in Sections 8.1, 8.9,
8.10, 12.3, 13.1.8, 14.8, 14.9 and 14.10 which shall survive the termination);
provided, however, that if either party hereto willfully fails to perform its
obligations hereunder or willfully neglects to perform acts that are necessary
to the fulfillment of conditions set forth herein or willfully prevents the
fulfillment of a condition set forth herein, the other party may seek any
available legal and equitable remedies in addition to those provided herein.

              13.3 Amendment. This Agreement may not be amended or modified
except by an instrument in writing signed on behalf of each of the parties
hereto and in compliance with applicable law.

              13.4 Waiver. At any time prior to the Effective Time, the parties
hereto may (i) extend the time for the performance of any of the obligations or
other acts of the other parties hereto, (ii) waive any inaccuracies in the
representations and warranties contained herein or in any document delivered
pursuant thereto, and (iii) waive compliance with any of the agreements or
conditions contained herein. Any agreement on the part of a party hereto to any
such extension or waiver shall be valid only if set forth in an instrument in
writing signed on behalf of such party.

         14.      MISCELLANEOUS.

              14.1 Other Documents. Each of the parties hereto shall execute and
deliver such other and further documents and instruments, and take such other
and further actions, as may be reasonably requested of them for the
implementation and consummation of this Agreement and the transactions herein
contemplated.

              14.2 Parties in Interest. This Agreement shall be binding upon and
inure to the benefit of the parties hereto, and their respective successors and
permitted assigns, but shall not confer, expressly or by implication, any rights
or remedies upon any other party.

              14.3 Governing Law. This Agreement is made and shall be governed
in all respects, including validity, interpretation and effect, by the laws of
the State of California.





                                  Page 74 of 77

<PAGE>   41
              14.4 Notices. All notices, requests or demands and other
communications hereunder must be in writing and shall be deemed to have been
duly given if personally delivered or 48 hours after mailing, postage prepaid,
to the parties as follows:

                  (a) If to Calnetics, to:  Clinton G. Gerlach

                                            Calnetics Corporation

                                            20401 Prairie Street

                                            Chatsworth, California 91311



                      With copies to:       Robert E. Dean, Esq.

                                            Gibson, Dunn & Crutcher LLP

                                            4 Park Plaza

                                            Irvine, California 92614



                  (b) If to Summa, to:      James R. Swartwout

                                            Summa Industries

                                            21250 Hawthorne Boulevard, Suite 500

                                            Torrance, California 90503



                      With copies to:       Michael J. Connell, Esq.

                                            Morrison & Foerster LLP

                                            555 West Fifth Street, Suite 3500

                                            Los Angeles, California 90013-1024



Any party hereto may change its address by written notice to the other party
given in accordance with this Section 14.4.

              14.5 Entire Agreement. This Agreement, together with the Agreement
of




                                  Page 75 of 77

<PAGE>   42
Merger and each of the other exhibits and schedules attached hereto, contains
the entire agreement between the parties and supersedes all prior agreements,
understandings and writings between the parties with respect to the subject
matter hereof. Each party hereto acknowledges that no representations,
inducements, promises or agreements, oral or otherwise, have been made by any
party, or anyone acting with authority on behalf of any party, which are not
embodied herein or in the Agreement of Merger or in an exhibit or schedule
hereto, and that no other agreement, statement or promise may be relied upon or
shall be valid or binding.

              14.6 Headings. The captions and headings used herein are for
convenience only and shall not be construed as a part of this Agreement. In this
Agreement, the term "including" and terms of similar import shall mean
"including without limitation" unless the context requires otherwise.

              14.7 Attorneys' Fees. In the event of any litigation between
Calnetics and Summa, the non-prevailing party shall pay the reasonable expenses,
including the attorneys' fees, of the prevailing party in connection therewith.

              14.8 Expenses. Except as otherwise expressly provided hereunder,
each party hereto agrees to pay all of its own expenses and to save the other
party harmless against liability for the payment of any such expenses arising in
connection with the negotiation, execution and consummation of the transactions
contemplated by this Agreement. Without limiting the generality of the
foregoing, all registration and filing fees, fees and disbursements of counsel
for Summa, expenses of any audits of Summa incident to or required by any such
registration and expenses of Summa's proxy solicitation and expenses of
complying with the securities or blue sky laws of any jurisdictions pursuant to
Section 12 hereof shall be borne and paid by Summa at Summa's sole cost and
expense. One-half of the expenses of printing the Joint Proxy
Statement/Prospectus, all expenses of distributing the Joint Proxy
Statement/Prospectus to and soliciting proxies from the Calnetics Shareholders,
all fees and disbursements of counsel for Calnetics, and the expenses of any
audits of Calnetics incident to or required by any such registration, shall be
borne and paid by Calnetics at Calnetics' sole cost and expense.

              14.9 Public Announcements. If any disclosure relating hereto is
believed by either party to be required under applicable securities laws, the
other party shall be given advance notice of such disclosure. Both parties shall
review in advance any proposed public announcement with respect to the
transactions contemplated herein.

              14.10 Survival. The representations and warranties of the parties
contained herein and in any other document or instrument delivered pursuant
hereto shall survive any investigations made by or on behalf of any other party
made prior to the Effective Time, but shall not survive beyond the Effective
Time. Nothing contained in this Section 14.10 shall in any way affect any
obligations of any party under this Agreement that are to be performed, in whole
or in part, after the Effective Date, nor shall it prevent or preclude any party
from




                                  Page 76 of 77

<PAGE>   43
pursuing any and all available remedies at law or in equity for actual fraud
against any party or parties guilty of such fraud.

              14.11 Counterparts. This Agreement may be executed in
counterparts, each of which shall be deemed an original but all of which taken
together shall constitute but one and the same document.

              14.12 Assignment. Neither this Agreement, the Agreement of Merger
nor any of the rights, interests or obligations hereunder or thereunder may be
assigned by either party without the prior written consent of the other party.

         IN WITNESS WHEREOF, the parties hereto have duly executed and delivered
this Agreement as of the day and year first above written.



SUMMA INDUSTRIES                              CALNETICS  CORPORATION



By:  /s/ James R. Swartwout                   By:  /s/ Clinton G. Gerlach
    ----------------------------                  -----------------------------
     James R. Swartwout                            Clinton G. Gerlach
     Chief Executive Officer                       Chief Executive Officer



         By signing below, each shareholder who owns or has voting control over
10% or more of the Common Stock of Calnetics outstanding as of the date hereof
agrees, subject to the terms and conditions of the foregoing Agreement, to vote,
or cause to be voted, in favor of this Agreement and the Merger, all of such
shares held of record or beneficially by such shareholder as of the record date
for the special meeting of Calnetics Shareholders referred to in Section 8.6
above:



                                              GERLACH HOLDING
                                              CORPORATION



                                              By:  /s/ Clinton G. Gerlach
                                                  ------------------------------
                                                   President




                                  Page 77 of 77

<TABLE> <S> <C>

<ARTICLE> 5
       
<S>                             <C>
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          JUN-30-1997
<PERIOD-START>                             JUL-01-1996
<PERIOD-END>                               MAR-31-1997
<CASH>                                       1,296,544
<SECURITIES>                                         0
<RECEIVABLES>                                6,102,695
<ALLOWANCES>                                   318,385
<INVENTORY>                                  5,321,585
<CURRENT-ASSETS>                            12,953,065
<PP&E>                                       8,204,930
<DEPRECIATION>                               3,931,711
<TOTAL-ASSETS>                              18,745,106
<CURRENT-LIABILITIES>                        4,293,163
<BONDS>                                      4,182,659
                                0
                                          0
<COMMON>                                     2,554,377
<OTHER-SE>                                   7,714,907
<TOTAL-LIABILITY-AND-EQUITY>                18,745,106
<SALES>                                     26,293,369
<TOTAL-REVENUES>                            26,293,369
<CGS>                                       19,371,380
<TOTAL-COSTS>                               23,760,035
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                29,864
<INTEREST-EXPENSE>                             250,989
<INCOME-PRETAX>                              2,252,481
<INCOME-TAX>                                   948,000
<INCOME-CONTINUING>                                  0
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                 1,304,481
<EPS-PRIMARY>                                      .42
<EPS-DILUTED>                                      .42
        

</TABLE>


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