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I 07 November 2003 i AGE-NC Project No 96-0254 IPage 2 of 9 ' consists 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 drawled primarily by the San Joaquin River I 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 I approximately 20 to 22 feet below surface grade (bsg), and has a western flow direction (Figure Ground water occurs in a generally silty sand extending from 20 to 25 feet bsg with approximately 5-foot thick silty clay layers above and below Poorly graded sand and silty sand extend from surface ' grade to approximately 15 feet bsg Ground water elevation data is presented in Table 1 2 3 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 210 East Wetmore Street, 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 ' On 16 September 2003, an AGE representative reviewed well drillers' reports at the California Department of Water Resources - Central District for water wells located in the surrounding area ' Drillers' reports for 1 industrial water well and 23 monitoring wells located at three different sites within a 2000-ft radius were found ' On 17 September 2001, an AGE representative conducted a search of the San Joaquin County Department of Environmental Health records of septic systems or permits for wells located on the site property No records of a past or existing septic tank or system were found during the search ' In September and October 2003 an AGE representative performed an area reconnaissance for _ p � eP ' visually observable potential sensitive receptors located within a 2,000-foot radius of the subject site Advanced GeAEnvironmental,Inc I