BOSTON BIOMEDICA ANNOUNCES SALE OF BBI SOURCE SCIENTIFIC

WEST BRIDGEWATER, MA, June 8, 2004 -- Boston Biomedica, Inc. (NASDAQ: BBII) today announced that it has completed the sale of substantially all of the assets as well as selected liabilities of BBI Source Scientific, Inc. (the CompanyÌs instrumentation division) to Source Scientific, LLC, an entity owned 35% by Mr. Richard W. Henson, 35% by Mr. Bruce A. Sargeant, and 30% by Boston Biomedica. Mr. Henson and Mr. Sargeant, two of the three original founders of BBI Source in 1980 (then called Ocean Scientific) are medical instrument executives with many years of experience in the life sciences instrumentation field.

Boston Biomedica also announced that it will record its ownership interest in Source Scientific, LLC through the equity accounting method, since it will retain both a 30% ownership interest and significant operational control over Source Scientific, LLC.

Mr. Richard T. Schumacher, CEO and Founder of Boston Biomedica, said: "This is an exciting and beneficial transaction for everyone. Our employees retain their jobs, our customers will be well cared for, we expect increased business for our vendors, management of BBI will be able to focus on the core business of the Company and on the pending sale of this business to SeraCare Life Sciences, and our PCT effort will benefit from the experience and expertise of two superb engineers/instrumentation specialists. We also expect that this transaction will significantly reduce the losses that the Company has been incurring relative to our continued investment in BBI Source Scientific over the years."

Mr. Richard W. Henson, CEO of Source Scientific, said: "Bruce and I could not be more excited about this transaction. We both remained very active in the life sciences instrumentation field after selling Ocean in 1986. The experience we gained over the past 18 years is an important asset as we focus on our goal of turning Source Scientific into a highly profitable, well respected, nationally known instrumentation company. And we are also quite certain that our knowledge and expertise will allow us to offer valuable and timely input into the development and manufacture of BBIÌs exciting PCT product line."