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i ' 17 February 2004 AGE-NC Project No 96-0254 ' Page 2 of 10 of very deep,moderately well-drained grayish brown and dark grayish brown clay The soil formed ' in alluvium derived from mixed rock sources The Modesto, Riverbank and Turlock Lake Formations and overlying Recent alluvium are the principal sources of domestic ground water in the 13,500-square mile San Joaquin Valley Ground Water Basin (Basin 5-22) This basin is drained primarily by the San Joaquin River 2 2 LOCAL GROUND WATER SETTING The nearest surface water feature in the vicinity of the property is the Stanislaus River approximately five miles south of the site Ground water at the site is currently encountered at a depth of r approximately 15 to 17 feet below surface grade(bsg),and has a north&9how direction(Exgure73)rslt J�, ez 1 Groundwater occurs in a generally silty sand extending from surface grade to approximately 25 feet bsg over the majonty of the site and from surface grade to approximately 15 feet bsg in the southern r portion of the site Ground water elevation data is presented in Table 1 ' 23 WELL SURVEY AGE conducted a sensitive receptor survey as part of the initial site characterization requirements ' under the California Code of Regulations-Title 23,Division 3,Chapter 16,Section 2654 for the site located at 983 Moffat Boulevard, Manteca, California (the site) The objective of the work was to identify and locate sensitive receptors, including wells,potentially affected by the UST release,and to identify and locate potential vertical conduits The scope of work included review of State of California Department of Water Resources records, San Joaquin County Department of Health Services records, and conducting a visual area reconnaissance for municipal,domestic,irrigation or ground water monitoring wells within a 2,000-foot radius of the site and septic systems located on the site ' In April 2000,AGE conducted a sensitive receptor survey to locate potential vertical conduits within a 2,000-foot radius of the site The survey located an agricultural well 1,750 feet southeast of the site ' at the Van Ryan Nut processing facility and two adjacent residences One domestic water well was observed 1,800 southwest of the site on Industrial Park Drive Additionally, one commercial/agricultural well was located down gradient approximately 2,200 feet northwest at a ' pickling processor Results of the investigation were reported in Wgll Sun�ey, dated 20 April 2000, prepared by AGE i 1 Advanced GeoEnvlronmentei,Inc 1