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0 0 <br /> GROUND ZERO ANALYSIS,INC. <br /> 1714 MainStreet <br /> Lscalon,California 95320-1927 <br /> Telephone:(209)838-9888 <br /> racsimile:(209)838-9883 <br /> December 14,2010 <br /> Mr. Pat Riddle <br /> Law Offices of Patrick D.Riddle,P.C. <br /> 22180 May Road <br /> Acampo,CA 95220 <br /> Subject: Valley Pacific Petroleum Services,Inc. 23100 S.Kasson Rd., Banta,CA <br /> RWQCB Request for Soil Sampling Workplan <br /> Dear Mr.Riddle: <br /> At your request, Ground Zero is writing to present a summary of our research into the <br /> conditions at the site. This is in response to the Regional Water Quality Control Board <br /> (RWQCB) directive for a workplan to investigate the potential presence, magnitude and <br /> extent of contamination resulting from a diesel spill that occurred at the subject property <br /> on March 14, 1998 <br /> Background <br /> Site Description <br /> The facility is a cardlock fueling operation dispensing gasoline and diesel fuel; The site <br /> is located at the northwest corner of the intersection of Highway 5 and Kasson Road in <br /> San Joaquin County California. Surrounding land use is agricultural and industrial. The <br /> Chevron Banta fuel terminal is located directly adjacent to the facility on the northwest. <br /> Site elevation is approximately 20 feet above sea level. The nearest natural body of <br /> surface water is Tont Paine Slough, located approximately 4,000 feet to the northeast. <br /> The location of the site is shown on Figure 1. <br /> Three aboveground storage tanks (ASTs)are located near the west side of the site (Figure <br /> 2). The ASTs are each of triple-walled steel and concrete construction. According to the <br /> site Spill Prevention, Control and Cou17termeasures Plan the facility was constructed in <br /> 1994. This was confirmed with aerial photos available on the San Joaquin County <br /> Assessor's Office web site. Initially two AST's were present, one 15,000-gallon diesel <br /> AST and one 2,000-gallon gasoline AST. A third diesel AST (20,000-gallon) was <br /> installed in 2003 or 2004(per aerial photos). The operational area of the site is currently <br /> G:SGROUNDZBVPPSIRANTA\TtEPORTSLLe4tcr to pat Riddle.doc <br />