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California-Regional Water Quality Con-trol Board <br /> Central Valley Region <br /> k l <br /> Karl E. Longley,ScD,P.E.,Chair <br /> Linda S.Adams Arnold <br /> Secretaryfor 1685 E Street,Fresno,Califomia 93706 Schwarzenegger <br /> Environmental (559)445-5116-Fax(559)445-5910 <br /> Protection <br /> http://www.waterboards.ca.gov/centralvalley Governor <br /> MD <br /> 17 December 2008 U�t✓ 18 2008 <br /> ENVIROWEN i HEALTH <br /> PER P01 TSIERVICES <br /> M. Scott Mansholt <br /> Chevron Environmental Management Company <br /> 6111 Bollinger Canyon Road <br /> Room 3432 <br /> San Ramon, CA 94583 <br /> REVIEW - SOIL AND GROUNDWATER INVESTIGATION REPORT, CATELLUS <br /> PROPERTY, TRACY, SAN JOAQUIN COUNTY <br /> Chevron Environmental Management Company (Chevron) submitted a Soil and Groundwater <br /> Investigation Report, dated 16 September 2008. The site investigation was completed and the <br /> report submitted by Science Applications International Corporation (SAIC) on behalf of <br /> Chevron. The Catellus Property (Site) lies along Byron Road between Van Sosten Road on <br /> the southeast to West Grant Line Road at the northwest end, northwest of Tracy. <br /> In conjunction with the current report, an investigation report completed by SAIC in 2006, was <br /> reviewed by Central Valley Regional Water Quality Control Board (Central Valley Water <br /> Board) staff, to evaluate the extent of affected soil and groundwater at the Site. Detailed <br /> comments are provided in the attached memorandum and summarized below. <br /> SAIC's 2008 report concluded the following.- <br /> * <br /> ollowing:• The lateral and vertical extent of affected soils has been defined. <br /> • The vertical extent of affected groundwater has been delineated. <br /> • Fuel fingerprint evaluation determined that petroleum hydrocarbons detected are <br /> consistent with degraded San Joaquin Valley crude oil. <br /> • The lateral extent of affected groundwater has been delineated except offsite, northeast <br /> of the North area. A separate workplan is being prepared by SAIC to address the <br /> former Tracy Pump Station. <br /> California Environmental Protection Agency <br /> Ca Recycled Paper <br />