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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
SCHEDULE 13G
UNDER THE SECURITIES EXCHANGE ACT OF 1934
(AMENDMENT NO. 6)*
PharmChem Laboratories, Inc.
- --------------------------------------------------------------------------------
(Name of Issuer)
Common Stock
- --------------------------------------------------------------------------------
(Title of Class of Securities)
717133 10 2
- --------------------------------------------------------------------------------
(CUSIP Number)
December 31, 1998
- --------------------------------------------------------------------------------
(Date of Event which Requires Filing of this Statement)
Check the appropriate box to designate the rule pursuant to which this
Schedule is filed:
[ ] Rule 13d-1(b)
[ ] Rule 13d-1(c)
[X] Rule 13d-1(d)
* The remainder of this cover page shall be filled out for a reporting
person's initial filing on this form with respect to the subject class of
securities, and for any subsequent amendment containing information which would
alter the disclosures provided in a prior cover page.
The information required on the remainder of this cover page shall not be
deemed to be "filed" for the purpose of Section 18 of the Securities Exchange
Act of 1934 ("Act") or otherwise subject to the liabilities of that section of
the Act but shall be subject to all other provisions of the Act (however, see
the Notes).
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CUSIP No. 717133 10 2
- -------------------------------------------------------------------------------
1. Names of Reporting Persons I.R.S. Identification Nos. of Above Persons
(entities only).
Grumman Hill Investments, L.P. 06-1145561
- -------------------------------------------------------------------------------
2. Check the Appropriate Box if a Member of a Group (See Instructions)
(a) [ ]
(b) [ ]
- -------------------------------------------------------------------------------
3. SEC Use Only
- -------------------------------------------------------------------------------
4. Citizenship or Place of Organization
Delaware
- -------------------------------------------------------------------------------
NUMBER OF 5. Sole Voting Power 0
SHARES ----------------------------------------------------------------
BENEFICIALLY 6. Shared Voting Power 535,545
OWNED BY ----------------------------------------------------------------
EACH 7. Sole Dispositive Power 0
REPORTING ----------------------------------------------------------------
PERSON WITH: 8. Shared Dispositive Power 535,545
- -------------------------------------------------------------------------------
9. Aggregate Amount Beneficially Owned by Each Reporting Person 535,545
- -------------------------------------------------------------------------------
10. Check if the Aggregate Amount in Row (9) Excludes Certain Shares
(See Instructions)
- -------------------------------------------------------------------------------
11. Percent of Class Represented by Amount in Row (9) 9.3%
- -------------------------------------------------------------------------------
12. Type of Reporting Person (See Instructions)
PN
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CUSIP No. 717133 10 2
- --------------------------------------------------------------------------------
1. Names of Reporting Persons I.R.S. Identifications Nos. of Above Persons
(entities only).
Richard D. Irwin
- --------------------------------------------------------------------------------
2. Check the Appropriate Box if a Member of a Group (See Instructions)
(a) [ ]
(b) [ ]
- --------------------------------------------------------------------------------
3. SEC Use Only
- --------------------------------------------------------------------------------
4. Citizenship or Place of Organization
United States
- --------------------------------------------------------------------------------
NUMBER OF 5. Sole Voting Power 90,876
SHARES --------------------------------------------------------------
BENEFICIALLY 6. Shared Voting Power 565,545
OWNED BY --------------------------------------------------------------
EACH 7. Sole Dispositive Power 90,876
REPORTING --------------------------------------------------------------
PERSON WITH: 8. Shared Dispositive Power 565,545
- --------------------------------------------------------------------------------
9. Aggregate Amount Beneficially Owned by Each Reporting Person 656,421
- --------------------------------------------------------------------------------
10. Check if the Aggregate Amount in Row (9) Excludes Certain Shares
(See Instructions)
- --------------------------------------------------------------------------------
11. Percent of Class Represented by Amount in Row (9) 11.4
- --------------------------------------------------------------------------------
12. Type of Reporting Person (See Instructions)
IN
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Item 1 (a) Name of Issuer:
PharmChem Laboratories, Inc.
(b) Address of Issuer's Principal Executive Offices:
1509-A O'Brien Drive
Menlo Park, CA 94025
Item 2 (a) Name of Person Filing:
I. Grumman Hill Investments, L.P.
II. Richard D. Irwin
(b) Address of Principal Business Office or, if none, Residence:
Grumman Hill Associates Inc.
191 Elm Street
New Canaan, CT 06840
(c) Citizenship:
I. Formed in the State of Delaware
II. United States of America
(d) Title of Class of Securities:
Common Stock
(e) CUSIP No.:
717133 10 2
Item 3 Type of Filing:
Not applicable
Item 4 Ownership
(a) Amount Beneficially Owned:
I. 535,545 Common Shares
II. 656,421 Common Shares (including 36,876
common shares to which there is a right
to acquire within 60 days of 12/31/98)
(b) Percent of Class:
I. 9.3
II. 11.4
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Item 4 (c) Number of shares as to which such person has:
(i) sole power to vote or to direct the vote:
I. 0 Common Shares
II. 90,876 Common Shares
(ii) shared power to vote or to direct the vote:
I. 535,545 Common Shares
II. 565,545 Common Shares
(iii) sole power to dispose or to direct the
disposition of:
I. 0 Common Shares
II. 90,876 Common Shares
(iv) shared power to dispose or to direct the
disposition of:
I. 535,545 Common Shares
II. 565,545 Common Shares
Item 5 Ownership of Five Percent or Less of a Class:
Not applicable.
Item 6 Ownership of More Than Five Percent on Behalf of Another
Person:
Not applicable.
Item 7 Identification and Classification of Subsidiary which
Acquired the Security Being Reported on by the Parent
Holding Company:
I. Not applicable.
II. Not applicable.
Item 8 Identification and Classification of Members of the Group:
Not applicable.
Item 9 Notice of Dissolution of Group:
Not applicable.
Item 10 Certificates:
Not applicable.
<PAGE> 6
SIGNATURE
After reasonable inquiry and to the best of my knowledge and belief, I certify
that the information set forth in this statement is true, complete and correct.
February 11, 1999
----------------------------------------
Date
/s/ RICHARD D. IRWIN
----------------------------------------
Signature
Richard D. Irwin, Manager
----------------------------------------
Name/Title
Grumman Hill Company
General Partner
Grumman Hill Investments, L.P.
February 11, 1999
----------------------------------------
Date
/s/ RICHARD D. IRWIN
----------------------------------------
Signature
Richard D. Irwin
----------------------------------------
Name/Title
