U.S. EPA, Contracts Management Division, Cincinnati, OH 45268-7001

66 -- ZETA POTENTIAL ANALYZER FOR THE USEPA LABORATORY IN ADA, OK POC Contact Point, Angela Thompson, (513)366-2005 The USEPA plans to negotiate a contract on a sole source basis with Brookhaven Instruments Corp., to provide a Zeta Potential Analyzer. Negotiations shall be conducted pursuant to the authority of 41 U.S.C. 253 (c)(1), which allows for negotiations without full and open competition if there is only one responsible source. The basis for this determination is that the Robert S. Kerr Environmental Research Laboratory (RSKERL) has a requirement for an instrument that possesses the unique capabilities of permitting no cell alignment and no ''stationary level'' requiring adjustment for measurement of zeta potential. These unique capabilities are essential for parameter measurements as many different people will use the instrument and cell alignment is very operator-dependent and thus affects zeta potential accuracy and precision. THIS IS NOT A REQUEST FOR PROPOSALS. Sources wishing to be considered must provide descriptive information which establishes their capability to meet the stated requirements. Documentation should be submitted within 15 days of publication of this notice. THIS NOTICE SUPERSEDES EARLIER SYNOPSIS PUBLISHED UNDER RFQ 96-99. (0198)

Loren Data Corp. http://www.ld.com (SYN# 0457 19960717\66-0020.SOL)