AIR & WATER TECHNOLOGIES CORP
11-K, 1994-06-29
ENGINEERING SERVICES
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<PAGE>

                  SECURITIES AND EXCHANGE COMMISSION

                        Washington, D.C. 20549



                            FORM 11-K


           [X] ANNUAL REPORT PURSUANT TO SECTION 15(d)
      OF THE SECURITIES EXCHANGE ACT OF 1934 [FEE REQUIRED]

          For the fiscal year ended December 31, 1993

                              Or

          [ ] TRANSITION REPORT PURSUANT TO SECTION 15(d)
            OF THE SECURITIES EXCHANGE ACT OF 1934
                      [NO FEE REQUIRED]


        For the transition period from                to
                                       --------------   --------------

                    Commission file number 
                                           ---------------


                   The Research-Cottrell Thrift Plan
     The Research-Cottrell, Inc. Corporate Division Profit Sharing Plan

                     -----------------------------


                    Air & Water Technologies Corporation
                                    and
                        Metcalf & Eddy Companies, Inc.
                    U.S. Highway 22 West and Station Road
                          Branchburg, New Jersey 08876
                               (908) 685-4000




<PAGE>
<TABLE>


                  INDEX TO FINANCIAL STATEMENTS AND SCHEDULES
                  -------------------------------------------
<CAPTION>

The Research-Cottrell Thrift Plan:
- - ---------------------------------
<S>                                                               <C>

  Report of Independent Public Accountants                         F-1

  Statements of Net Assets Applicable to Participants'
    Equity as of December 31, 1993 and 1992                        F-2

  Statements of Changes in Net Assets Applicable to
    Participants' Equity for the Year Ended
    December 31, 1993                                              F-3

  Notes to Financial Statements                                    F-4 - F-7


The Research Cottrell, Inc. Corporate Division Profit Sharing Plan:
- - ------------------------------------------------------------------

  Report of Independent Public Accountants                         F-8

  Statements of Net Assets Applicable to Participants'
    Equity as of December 31, 1993 and 1992                        F-9

  Statements of Changes in Net Assets Applicable to
    Participants' Equity for the Year Ended
    December 31, 1993                                              F-10

  Notes to Financial Statements                                    F-11 - F-15
</TABLE>
<PAGE>


                  REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS
                  ----------------------------------------




To the Administrative Committee of
  The Research-Cottrell, Inc. Thrift Plan:


We have audited the accompanying statements of net assets
applicable to participants' equity of The Research-Cottrell
Thrift Plan (the Plan) as of December 31, 1993 and 1992, and the
related statement of changes in net assets applicable to
participants' equity for the year ended December 31, 1993.  These
financial statements are the responsibility of the Plan
administrator.  Our responsibility is to express an opinion on
these financial statements based on our audits. 

We conducted our audits in accordance with generally accepted
auditing standards.  Those standards require that we plan and
perform the audit to obtain reasonable assurance about whether the
financial statements are free of material misstatement.  An
audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements.  An audit
also includes assessing the accounting principles used and
significant estimates made by management, as well as evaluating
the overall financial statement presentation.  We believe that our
audits provide a reasonable basis for our opinion.

In our opinion, the financial statements referred to above present
fairly, in all material respects, the net assets of the Plan
as of December 31, 1993 and 1992, and the changes in its net
assets applicable to participants' equity for the year ended
December 31, 1993 in conformity with generally accepted accounting
principles.


                                         ARTHUR ANDERSEN & CO.



Roseland, New Jersey 
June 2, 1994 











                               F-1
<PAGE>


                THE RESEARCH-COTTRELL THRIFT PLAN
                ---------------------------------

   STATEMENTS OF NET ASSETS APPLICABLE TO PARTICIPANTS' EQUITY
   -----------------------------------------------------------
                 AS OF DECEMBER 31, 1993 AND 1992
                 -------------------------------- 

<TABLE>
<CAPTION>

                                                      1993          1992     
                                                  -----------   -----------
<S>                                                <C>          <C>

CONTRIBUTION RECEIVABLE FROM EMPLOYER (Note 1)    $   143,074   $   187,883

BENEFICIAL INTEREST IN RESEARCH-COTTRELL 
  MASTER TRUST ($25,507,782 and $23,059,412 
  at cost in 1993 and 1992, respectively)
  (Notes 2 and 4)                                  28,703,087    25,734,848
                                                  -----------   -----------
NET ASSETS APPLICABLE TO PARTICIPANTS' EQUITY     $28,846,161   $25,922,731
                                                  ===========   ===========
</TABLE>






          The accompanying notes to financial statements
             are an integral part of these statements. 


























                               F-2

<PAGE>

                        THE RESEARCH-COTTRELL THRIFT PLAN
                        ---------------------------------

      STATEMENT OF CHANGES IN NET ASSETS APPLICABLE TO PARTICIPANTS' EQUITY
      ---------------------------------------------------------------------

                      FOR THE YEAR ENDED DECEMBER 31, 1993
                      ------------------------------------

<TABLE>
<CAPTION>

                                                        Air & Water 
                                     Cash Equivalents   Technologies
                     Cash and Cash   Fixed Income and   Corporation 
                      Equivalents      Common Stock     Common Stock  Total
                     -------------   ----------------   ------------  -------

<S>                       <C>            <C>             <C>          <C>
NET ASSETS APPLICABLE 
  TO PARTICIPANTS' EQUITY, 
    beginning of year    $9,820,828    $15,464,976      $636,927    $25,922,731
                          ----------   -----------      --------    -----------

ADDITIONS (Notes 1 and 2): 
 Contributions
   Employer                 215,956        386,348        28,046        630,350
   Employee               1,559,939      2,924,219       220,671      4,704,829
  Interest and dividend
  income earned on 
  beneficial interest in 
  Research-Cottrell 
    Master Trust            299,140        664,194           466        963,800
  Net appreciation on
  beneficial interest in
  Research-Cottrell
    Master Trust                  -      1,036,130        93,922      1,130,052
                          ----------    -----------     --------   -----------
                          2,075,035      5,010,891       343,105      7,429,031
                          ----------    -----------     --------   -----------
DEDUCTIONS: 
  Distributions to 
    participants         (1,840,362)    (2,380,143)     (179,808)    (4,400,313)
  Administrative expenses   (13,244)       (89,149)       (2,895)      (105,288)
                          ----------    -----------      --------   -----------
                         (1,853,606)    (2,469,292)     (182,703)    (4,505,601)
                          ----------    -----------     ---------   -----------
TRANSFERS BETWEEN FUNDS    (318,056)       376,200       (58,144)            -  
                          ----------    -----------     --------    -----------
NET ASSETS APPLICABLE TO
  PARTICIPANTS' EQUITY, 
  end of year            $9,724,201    $18,382,775      $739,185    $28,846,161
                         ==========    ===========      ========    ===========


</TABLE>


The accompanying notes to financial statements are an integral part of this
statement.










              F-3

<PAGE>
                THE RESEARCH-COTTRELL THRIFT PLAN
                ---------------------------------

                  NOTES TO FINANCIAL STATEMENTS
                  -----------------------------




(1) Plan description: 
    ----------------

     General-
     ------- 

      The Plan is a defined contribution plan for which
       contributions are made by Research-Cottrell, Inc. (the Company) and
       participants.  The Company is a wholly-owned subsidiary
       of Air & Water Technologies Corporation (AWT).  All
       eligible employees of AWT and its subsidiaries may elect
       to participate in the Plan.  The Board of Directors of
       Research-Cottrell, Inc. has appointed an administrative
       committee to manage and administer the Plan.  

     Contributions -
     -------------

      Employer -
      --------

       The Company contributes to the Plan on a discretionary
        basis, an amount equal to 25% of the participants' contributions
        up to a maximum of 4% of the employees' base salary for
        a calendar quarter.  Company contributions for the
        applicable quarter are paid to the Plan trust by the end
        of the following quarter.  Any amounts forfeited by
        terminated participants are applied to reduce employer
        contributions.  Forfeitures amounted to $103,885 in 1993.  

      Employee -
      --------

       Participants may contribute up to a maximum of 10% of
        their compensation, as defined in the Plan.  Such
         contributions to the Plan are made through payroll
         deductions and are invested, along with employer
         contributions in the Research-Cottrell Master Trust.  

      Withdrawals -
      -----------

       Participants may withdraw funds from their respective
        account balances if any of the following events should occur -

        1. Attainment of age 59-1/2
        2. Termination of employment
        3. Death
        4. Total disability
        5. Retirement
        6. An event of financial hardship, as defined





                               F-4

<PAGE>
       Participants are required to begin receiving benefits
         under the Plan by the April 1 following the calendar year in which
         the participant attains age 70-1/2 even if not yet retired.  

       Upon termination of employment prior to eligibility for
         retirement, a participant is eligible to receive the vested balance
         in his account.  Payments due to participants who have
         requested to withdraw their funds prior to December 31,
         1993 and 1992 total approximately $1,217,000 and
         $1,215,000, respectively.

     Eligibility and vesting -
     -----------------------

      All employees are eligible to participate in the Plan on any 
       January 1 or July 1 following their date of employment
       provided that they have completed one full year of
       service and attained the age of 21.  Employees are
       immediately vested in their voluntary contributions plus
       actual earnings thereon.  Vesting in the remainder of
       their accounts is based on years of continuous service as
       follows-
<TABLE>
<CAPTION>
           Years of 
            Service                        Vesting Percentage
           --------                        ------------------         

         <C>                                     <C>
              1                                   10%
              2                                   20%
              3                                   30%
              4                                   40%
              5                                   60%
              6                                   80%
          7 or more                              100%
</TABLE>
     Participant loans -
     -----------------

      A participant, while in active employment, may request a
       loan from the Plan.  The amount of the loan cannot exceed the 
       lesser of $50,000 or one-half of the value of the participant's
       nonforfeitable accrued benefit.  No loans were outstanding as of 
       December 31, 1993 and 1992.  

     Retirement -
     ----------

      A participant's normal retirement date is the first day of
       the month coincident with or following the attainment of age 65. 

(2) Summary of significant 
      accounting policies: 
    ----------------------

     Valuation of investments -
     ------------------------

      Effective April 3, 1984, the Company established the
       Research-Cottrell Master Trust (Master Trust).  The Master Trust is
       maintained by Chemical Bank.  The Master Trust provides
       participants with three investment options.  Amounts
       contributed to Fund A are invested in cash equivalents. 
       Amounts contributed to Fund B are invested in 




                               F-5
<PAGE>

       cash equivalents, fixed income securities and common
       stocks.  Amounts contributed to Fund C are invested
       primarily in Air & Water Technologies Corporation Class A
       Common Stock. The Plan has a beneficial interest,
       along with another employee benefit plan of the Company
       in the Master Trust (Note 4).  Administrative expenses of
       the Plan are paid from the assets of the Plan.  

      Investments in Fund A are valued at cost, which approximates
       market.  Investments in Funds B and C are traded on national
       securities exchanges and are valued at the last reported
       sales price on the last business day of the plan year.  

     Security transactions and 
       investment income -    
     -------------------------

      Purchases and sales of securities are reported on a trade
       date basis.  Gains or losses on sales of securities are based
       on average cost.  Dividend income is recorded on the
       ex-dividend date and interest income on an accrual basis.
          

     Tax status -
     ----------

      The Plan obtained its latest determination letter on October
       11, 1985, in which the Internal Revenue Service stated that the
       Plan, as then designed, was in compliance with the
       applicable requirements of the Internal Revenue Code.  The
       Plan has been amended since receiving the
       determination letter.  However, the plan administrator
       and the Plan's tax counsel believe that the Plan is
       currently designed and being operated in compliance with
       the applicable requirements of the Internal Revenue Code. 
       Therefore, they believe that the Plan was qualified
       and the related trust was tax-exempt as of December 31,
       1993 and 1992.

     Allocations to participants' 
       accounts -                
     ---------------------------

      Earned income on investments of the Plan is allocated to the 
       participants' individual accounts quarterly in the ratio
       that the value of each individual's account bears to the
       aggregate value of all participants' accounts at the
       beginning of each quarter. 

(3) Termination priorities: 
    ----------------------

     The Company has the right to terminate the Plan at any time
      and in the event the Plan is terminated, subject to conditions set
      forth by Employee Retirement Income Security Act of 1974,
      the amount of each participant's account balance in the
      Plan becomes fully vested.  The Company has not expressed
      any intention to terminate the Plan. 










                               F-6
<PAGE>

(4) Beneficial interest 
      in the Master Trust: 
    ----------------------

     The Plan's beneficial interest in the current market value of
      the assets of the Master Trust is based on its pro rata share of such
      assets.  Investment income and realized and unrealized gains
      and losses of the Master Trust are allocated to the
      Plan quarterly, based on the Plan's pro rata share of the
      market value of the assets held as of the end of the prior
      quarter.  The Plan's share of the market value of the
      investments listed below is 55% and 51.1% at December 31,
      1993 and 1992, respectively.  Investments held by the
      Master Trust at December 31, 1993 and 1992 are summarized
      as follows (in thousands)-

<TABLE>
<CAPTION>
                                          1993                1992    
                                  ---------------------------------------- 
                                  Market Value  Cost    Market Value  Cost   
                                  ------------ ------   ------------  ------

   <S>                              <C>        <C>        <C>         <C>
   Cash equivalents 
     and accrued income             $22,112    $22,100    $22,827     $22,814
   U. S. Government 
     securities                       7,622      6,658      7,629       7,066
   Corporate and 
     foreign bonds                    3,906      3,575      3,305       2,928
   Common stocks                     18,568     12,106     16,605      10,712
                                    -------    -------    -------     -------
                Total               $52,208    $44,439    $50,366     $43,520
                                    =======    =======    =======     =======
</TABLE>
     As of December 31, 1993 and 1992, the Master Trust held
      64,276 and 63,063 shares of AWT common stock, respectively, with a
      market value of $964,140 and $819,819, respectively,
      ($1,208,552 and $1,239,377, respectively, at cost).  During
      1993, the Master Trust purchased 8,632 shares of AWT
      common stock at a cost of $112,305 and sold 7,419 shares of
      AWT common stock at a price of $89,064, resulting in a
      realized loss of $52,538.  























                               F-7
<PAGE>




                  REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS
                  ----------------------------------------


To the Administrative Committee of the 
  Research Cottrell, Inc. Corporate
  Division Profit Sharing Plan:  


We have audited the accompanying statements of net assets
applicable to participants' equity of Research Cottrell, Inc.
Corporate Division Profit Sharing Plan (the Plan) as of December
31, 1993 and 1992, and the related statement of changes in net
assets applicable to participants' equity for the year ended
December 31, 1993.  These financial statements are the
responsibility of the Plan administrator.  Our responsibility is
to express an opinion on these financial statements based on our
audits.

We conducted our audits in accordance with generally accepted
auditing standards.  Those standards require that we plan and
perform the audit to obtain reasonable assurance about whether the
financial statements are free of material misstatement.  An
audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements.  An audit
also includes assessing the accounting principles used and
significant estimates made by management, as well as evaluating
the overall financial statement presentation.  We believe that our
audits provide a reasonable basis for our opinion.

As discussed in Note 1, effective December 31, 1991, Research
Cottrell, Inc. merged six affiliated profit sharing plans into the
Plan.  Included in the merged plan is $1,401,989 of net assets
applicable to participants equity as of December 31, 1993,
transferred from the Power Application Mfg. Co. Profit Sharing
Plan.  Prior to 1989, this plan was not subject to the Employee
Retirement Income Security Act audit requirements.  Because of the
lack of Power Application & Mfg. Co. Profit Sharing Plan
records prior to January 1, 1987, we were unable to perform
auditing procedures with respect to the participants' individual
interests accumulated from inception of that plan and therefore
are unable to form an opinion regarding the basis on which Power
Application & Mfg. Co. Profit Sharing Plan participants' equity is
stated as of December 31, 1986, or the propriety of certain
distributions to withdrawn participants subsequent thereto.  

In our opinion, except for the effect of such adjustments, if any,
as might have been disclosed had we been able to apply certain
auditing procedures as discussed in the preceding paragraph, the
financial statements referred to above present fairly, in all
material respects, the net assets of the Plan as of December 31,
1993 and 1992, and the changes in its net assets applicable to
participants' equity for the year ended December 31, 1993 in
conformity with generally accepted accounting principles.


                                         ARTHUR ANDERSEN & CO.


Roseland, New Jersey 
June 2, 1994 

                               F-8
<PAGE>


  RESEARCH COTTRELL, INC. CORPORATE DIVISION PROFIT SHARING PLAN
  --------------------------------------------------------------


   STATEMENTS OF NET ASSETS APPLICABLE TO PARTICIPANTS' EQUITY
   -----------------------------------------------------------

                 AS OF DECEMBER 31, 1993 AND 1992
                 --------------------------------




<TABLE>
<CAPTION>
                                                       1993          1992     
                                                   -----------   -----------
<S>                                                <C>           <C>
BENEFICIAL INTEREST IN RESEARCH-COTTRELL 
  MASTER TRUST ($18,931,146 and $20,461,263 
  at cost in 1993 and 1992, respectively)
  (Notes 2 and 4)                                  $23,505,155   $24,630,857
                                                   -----------   -----------
NET ASSETS APPLICABLE TO PARTICIPANTS' EQUITY      $23,505,155   $24,630,857
                                                   ===========   ===========

</TABLE>



          The accompanying notes to financial statements
              are an integral part of these statements. 

























                               F-9
<PAGE>


             RESEARCH COTTRELL, INC. CORPORATE DIVISION PROFIT SHARING PLAN
             --------------------------------------------------------------

        STATEMENT OF CHANGES IN NET ASSETS APPLICABLE TO PARTICIPANTS' EQUITY
        ---------------------------------------------------------------------

                          FOR THE YEAR ENDED DECEMBER 31, 1993
                          ------------------------------------

<TABLE>
<CAPTION>


                                                          Air & Water  
                                       Cash Equivalents  Technologies  
                        Cash and Cash  Fixed Income and  Corporation   
                        Equivalents     Common Stock     Common Stock   Total 
                        -------------  ----------------  ------------  --------

<S>                      <C>           <C>               <C>         <C>
NET ASSETS APPLICABLE TO 
  PARTICIPANTS' EQUITY, 
  beginning of year      $9,883,130    $14,512,417       $235,310    $24,630,857
                         ----------    -----------       --------   -----------
ADDITIONS: 
  Employee rollover 
   contributions              2,117         69,794         11,411        83,322
  Interest and dividend 
    income earned on 
    beneficial interest in 
    Research-Cottrell
    Master Trust            282,243        583,598            154       865,995
  Net appreciation on 
    beneficial interest in
    Research-Cottrell
    Master Trust                  -        929,435         27,267       956,702
                         ----------    -----------       --------   -----------
                            284,360      1,582,827         38,832     1,906,019
                         ----------    -----------       --------   -----------
DEDUCTIONS:
  Distributions to 
    participants         (1,341,530)    (1,570,499)       (28,161)   (2,940,190)
  Administrative expenses   (12,504)       (78,055)          (972)      (91,531)
                         ----------    -----------       --------   -----------
                         (1,354,034)    (1,648,554)       (29,133)   (3,031,721)
                         ----------    -----------       --------   -----------
TRANSFERS BETWEEN FUNDS    (390,459)       398,846         (8,387)         - 
                         ----------    -----------       --------   -----------
NET ASSETS APPLICABLE TO PARTICIPANTS' EQUITY, 
  end of year             $8,422,997   $14,845,536       $236,622   $23,505,155
                         ==========    ===========       ========   ===========


</TABLE>

              The accompanying notes to financial statements are an 
                        integral part of this statement.






                               F-10

<PAGE>


      RESEARCH COTTRELL, INC. CORPORATE DIVISION PROFIT SHARING PLAN
      -------------------------------------------------------------- 

                  NOTES TO FINANCIAL STATEMENTS
                  -----------------------------




(1) Plan description: 
- - ---------------------
     General-
     --------
      The Plan is a defined contribution plan for which
       contributions are made by Research Cottrell, Inc. Corporate Division 
       (the Company), and participants.  The Company is a wholly-owned
       subsidiary of Air & Water Technologies Corporation
       (AWT).  All eligible employees of AWT and its
       subsidiaries participate in the Plan.  The Board of
       Directors of Research-Cottrell, Inc. has appointed an
       administrative committee to manage and administer the
       Plan.  

      Effective December 31, 1991, the Company merged the Research
       Cottrell, Inc. Air Pollution Control Division Profit Sharing Plan,
       the Custodis Cottrell, Inc. Profit Sharing Plan, the
       Research Cottrell, Inc. Environmental Engineering Profit
       Sharing Plan, the Flex Kleen Corporation Profit Sharing
       Plan, the KVB, Inc. Profit Sharing Plan and the Power
       Application & Mfg. Co. Profit Sharing Plan into the
       Research Cottrell, Inc. Corporate Division Profit Sharing
       Plan.  All terms and policies of the plans were identical.

      Included in the merged Plan is $1,401,989 of net assets
       applicable to participants equity as of December 31, 1993, transferred
       from the Power Application Mfg. Co. Profit Sharing Plan. 
       Prior to 1989, this plan was not subject to the Employee
       Retirement Income Security Act audit requirements. 
       Because of the lack of Power Application & Mfg. Co.
       Profit Sharing Plan records prior to January 1, 1987, the
       participants' individual interests accumulated from
       the time of inception of that plan were not subject to
       audit procedures.  

     Contributions
     -------------
      Employer-
      ---------
       Each year the Company may contribute to the Plan a portion
        of its current or accumulated net income as authorized by the
        Board of Directors.  During 1993, no employer contributions 
        were authorized or made. 

      Employee-
      --------
       Through December 31, 1991, participants could contribute
        up to a maximum of 10% of their compensation, as defined in the
        Plan.  Contributions were made to the Plan through payroll deductions 
        and were invested in the Research-Cottrell Master Trust.  
        During 1992, the Plan was amended and employee contributions were
        discontinued.  

                               F-11

<PAGE>

     Eligibility and vesting-
     -----------------------
      All employees are eligible to participate in the Plan on any 
       January 1 or July 1 following their date of employment
       provided that they have completed one full year of
       service and attained the age of 21.  Employees are
       immediately vested in their voluntary contributions plus
       actual earnings thereon.  Vesting in the remainder of
       their accounts is based on years of continuous service as
       follows-
<TABLE>
<CAPTION>
          Years of 
           Service                           Vesting Percentage
           -------                           ------------------
          <C>                                    <C>
              1                                   10%
              2                                   20%
              3                                   30%
              4                                   40%
              5                                   60%
              6                                   80%
          7 or more                              100%
</TABLE>
     Withdrawals-
     ------------
      Participants may withdraw funds from their respective
       account balances if any of the following events should occur-

          1. Attainment of age 59-1/2
          2. Termination of employment
          3. Death
          4. Total disability
          5. Retirement
          6. An event of financial hardship, as defined.

      Participants are required to begin receiving benefits under
       the Plan by the April 1 following the calendar year in which the
       participant attains age 70-1/2 even if not yet retired.

      Upon termination of employment prior to eligibility for
       retirement, a participant is eligible to receive the vested balance in
       his account.  Payments due to participants who have
       requested to withdraw their funds prior to December 31,
       1993 and 1992 total approximately $1,005,000 and $799,000,
       respectively.

     Retirement
     ----------
      A participant's normal retirement date is the first day of
       the month coincident with or following the attainment of age 65. 











                               F-12

<PAGE>

(2) Summary of significant 
    accounting policies: 
    ----------------------
     Valuation of investments
     ------------------------
      Effective April 3, 1984, Research-Cottrell, Inc. established
       the Research-Cottrell Master Trust (Master Trust).  The Master
       Trust is maintained by Chemical Bank.  The Master
       Trust provides participants with three investment
       options.  Amounts contributed to Fund A are invested in
       cash equivalents.  Amounts contributed to Fund B are
       invested in cash equivalents, fixed income securities and
       common stocks.  Amounts contributed to Fund C are
       invested primarily in Air & Water Technologies
       Corporation Class A Common Stock.  The remainder of the
       Funds are invested in cash equivalents.  The Plan has a
       beneficial interest, along with another employee benefit
       plan of Research-Cottrell, Inc. in the Master Trust (Note
       4).  Administrative expenses of the Plan are paid from
       the assets of the Plan.  

      Investments in Fund A are valued at cost, which approximates
       market. Investments in Funds B and C are traded on national
       securities exchanges and are valued at the last reported
       sales price on the last business day of the year.  

     Security transactions and 
       investment income     
     ------------------------- 
      Purchases and sales of securities are reported on a trade
       date basis.  Gains or losses on sales of securities are based
       on average cost.  Dividend income is recorded on the
       ex-dividend date and interest income on an accrual basis.
          

     Tax status
     ----------
      The Plan obtained its latest determination letter on August
       9, 1985, in which the Internal Revenue Service stated that the
       Plan, as then designed, was in compliance with the
       applicable requirements of the Internal Revenue Code.  The
       Plan has been amended since receiving the determination letter.  
       However, the plan administrator and the Plan's tax counsel believe 
       that the Plan is currently designed and being operated in compliance 
       with the applicable requirements of the Internal Revenue Code. 
       Therefore, they believe that the Plan was qualified
       and the related trust was tax-exempt as of December 31,
       1993 and 1992.

     Allocations to participants' 
       accounts                
     ----------------------------
      Employer contributions
      ----------------------
       The amount contributed by the Company is allocated to each 
        participant annually in the ratio in which compensation,
        as defined, of each participant bears to the
        aggregate compensation of all participants.  During
        1993, no employer contributions were made to the Plan.



                               F-13

<PAGE>

      Income from investments
      -----------------------
       Earned income on investments of the Plan is allocated to
         the participants' individual accounts quarterly in the ratio
         that the value of each individual's account bears to
         the aggregate value of all participants' accounts at
         the beginning of each quarter. 

      Forfeitures-
      ------------
       Participants who terminate before becoming fully vested
         forfeit that portion of their account to which they are not entitled.
         Forfeitures are periodically allocated among all
         continuing participants.  Forfeitures amounted to $137,526 in 1993.  

(3) Termination priorities: 
    ----------------------
     The Company has the right to terminate the Plan at any time
      and in the event the Plan is terminated, subject to conditions set
      forth by Employee Retirement Income Security Act of 1974,
      the amount of each participant's account balance in the
      Plan becomes fully vested.  The Company has not expressed
      any intention to terminate the Plan. 

(4) Beneficial interest 
      in the Master Trust: 
    ---------------------
     The Plan's beneficial interest in the current market value of
      the assets of the Master Trust is based on its pro rata share of such
      assets.  Investment income and realized and unrealized gains
      and losses of the Master Trust are allocated to the
      Plan quarterly, based on the Plan's pro rata share of the
      market value of the assets held as of the end of the prior
      quarter.  The Plan's share of the market value of the
      investments listed below is 45% and 48.9% at December 31,
      1993 and 1992, respectively.  Investments held by the
      Master Trust at December 31, 1993 and 1992 are summarized
      as follows (in thousands) -                              
<TABLE>
<CAPTION>
                
                                   1993                   1992    
                              ---------------     ----------------     
                            Market Value  Cost   Market Value  Cost   
                            ------------  ----   ------------  ---- 
      
      <S>                     <C>      <C>         <C>        <C>
      Cash equivalents 
        and accrued income    $22,112  $22,100     $22,827    $22,814
      U. S. Government 
        securities              7,622    6,658       7,629      7,066
      Corporate and 
        foreign bonds           3,906    3,575       3,305      2,928
      Common stocks            18,568   12,106      16,605     10,712
                              -------  -------     -------    -------
                Total         $52,208  $44,439     $50,366    $43,520
                              =======  =======     =======    =======




</TABLE>




                               F-14


<PAGE>
     As of December 31, 1993 and 1992, the Master Trust held
      64,276 and 63,063 shares of AWT common stock, respectively, with a
      market value of $964,140 and $819,819, respectively,
      ($1,208,552 and $1,239,377, respectively, at cost).  During
      1993, the Master Trust purchased 8,632 shares of AWT
      common stock at a cost of $112,305 and sold 7,419 shares of
      AWT common stock at a price of $89,064, resulting in a
      realized loss of $52,538.









                               F-15

<PAGE>
                               SIGNATURES


    Pursuant to the requirements of the Securities Exchange Act of 1934, 
    the trustees (or other persons who administer the employee benefit plans) 
    have duly caused this annual report to be signed on behalf of the     
    undersigned hereunto duly authorized.    

			                              		The Research-Cottrell Thrift Plan
					                              The Research Cottrell Corporate Division
					                              Profit Sharing Plan


Date  June 28, 1994                               /s/ Augustine W. Bolella
- - -------------------		                             ------------------------
                                                   Augustine W. Bolella



<PAGE>







                           CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS
                           -----------------------------------------



To the Administrative Committee of the
	Research-Cottrell, Inc. Thrift Plan: 


As independent public accountants, we hereby consent to the incorporation 
of our report included in this Form 11-K into Air & Water Technologies 
Corporation previously filed Registration Statement on Form S-8 
(File No. 33-35939).



                                     	ARTHUR ANDERSEN & CO.


Roseland, New Jersey 
June 28,1994


<PAGE>







                           CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS
                           -----------------------------------------



To the Administrative Committee of the
	Research-Cottrell, Inc. Corporate 
 Division Profit Sharing Plan:

As independent public accountants, we hereby consent to the incorporation 
of our report included in this Form 11-K into Air & Water Technologies 
Corporation previously filed Registration Statement on Form S-8 
(File No. 33-35939).



                                     	ARTHUR ANDERSEN & CO.


Roseland, New Jersey 
June 28,1994



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