U.S. Geological Survey, MS 205C, 12201 Sunrise Valley Drive, Reston, VA 20192

B -- HYDROLOGIC AND GEOCHEMICAL CONTROL ON EPISODIC ACIDIFICATION OF STREAMS IN SHENANDOAH NATIONAL PARK, VIRGINIA: DEVELOPMENT AND TESTING OF A PREDICTIVE MODEL SOL n/a DUE 031299 POC Faith Peters, fax 703-648-7901 E-MAIL: Contracting Officer, fpeters@usgs.gov. The U.S. Geological Survey (AUSGS) has a requirement for Hydrologic and geochemical control on episodic acidification of streams in Shenandoah National Park, Virginia: Development and testing of a predictive model. THE USGS ANTICIPATES AWARDING THE PURCHASE ORDER TO UNIVERSITY OF VIRGINIA, DEPARTMENT OF ENVIRONMENTAL SCIENCES, professors and students at the University have developed models that link hydrology and chemical data through a variation of the original TOPMODEL. THIS ANNOUNCEMENT IS FOR INFORMATIONAL PURPOSES ONLY, no formal RFQ will be available. Vendors who manufacture the above items are invited to provide an affirmative response to this notice. An affirmative response must include, but not be limited to offered products, price lists, warranties, and any additional information indicating a bona fide ability to meet this requirement. All responses must be received in this office within 10 calendar days for the date this publication first appears. All responses must be in writing, no telephone requests will be accepted. Posted 03/02/99 (W-SN303885). (0061)

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