UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 13G/A UNDER THE SECURITIES AND EXCHANGE ACT OF 1934 (AMENDMENT NO. 1) BOSTON BIOMEDICA, INC. - -------------------------------------------------------------------------------- (Name of Issuer) Common Stock ------------ (Title of Class of Securities) 100560101 - -------------------------------------------------------------------------------- (CUSIP Number) Page 1 of 5 Pages - ------------------------ ------------------------------ CUSIP NO. 100560101 Page 2 of 5 Pages ------ ------ - ------------------------ ------------------------------ - -------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON Richard T. Schumacher - -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP N/A - -------------------------------------------------------------------------------- 3 SEC USE ONLY - -------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION U.S.A. - -------------------------------------------------------------------------------- 5 SOLE VOTING POWER NUMBER OF 1,012,707 shares SHARES ------------------------------------------------------------ BENEFICIALLY 6 SHARED VOTING POWER OWNED BY EACH 0 shares REPORTING ------------------------------------------------------------ PERSON 7 SOLE DISPOSITIVE POWER WITH 1,012,707 shares ------------------------------------------------------------ 8 SHARED DISPOSITIVE POWER 0 shares - -------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 1,012,707 shares - -------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* [x] - -------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 21.1% - -------------------------------------------------------------------------------- 12 TYPE OF REPORT* IN - -------------------------------------------------------------------------------- Page 2 of 5 Pages ITEM 1(a) Name of Issuer: Boston Biomedica, Inc. ITEM 1(b) Address of Issuer's Principal Executive Offices: 375 West Street, West Bridgewater, MA 02379 ITEM 2(c) Name of Person Filing: Richard T. Schumacher ITEM 2(b) Address of Principal Business Office or, if none, Residence: 375 West Street, West Bridgewater, MA 02379 ITEM 2(c) Citizenship: USA ITEM 2(d) Title of Class of Securities: Common Stock, $.01 par value ITEM 2(e) CUSIP Number: 100560101 ITEM 3 Not Applicable ITEM 4 Ownership: (a) Amount Beneficially Owned: 1,012,707 shares, including (i) 133,750 shares issuable pursuant to immediately exercisable stock options, (ii) 50,000 shares held of record by Mr. Page 3 of 5 Pages Schumacher's wife and (iii) 20,000 shares held of record by Mr. Schumacher as custodian for his daughter. Excludes certain shares held by other relatives of Mr. Schumacher, as to which he disclaims beneficial ownership. (b) Percent of Class: 21.1% (c) Number of Shares as to which such person has: (i) sole power to vote or to direct the vote: 1,012,707 shares (ii) shared power to vote or to direct the vote: -0- (iii) sole power to dispose or to direct the disposition of: 1,012,707 shares (iv) shared power to dispose or to direct the disposition of: -0- ITEM 5 Ownership of Five Percent or Less of Class: Not Applicable ITEM 6 Ownership of More than Five Percent on Behalf of Another Person: Not Applicable ITEM 7 Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on By the Parent Holding Company: 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 Certification: Not Applicable Page 4 of 5 Pages 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 T. Schumacher - ----------------------------------------------- Richard T. Schumacher Page 5 of 5 Pages