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WALLACE • KUHL September 7, 1995 <br /> 6 ASSOCIATES INC <br /> Mr Hop Essick <br /> Granite Construction <br /> Post Office Box 151 <br /> Stockton, California 95201 <br /> QUARTERLY GROUND WATER MONITORING REPORT <br /> GRANITE CONSTRUCTION FACILITY <br /> 10500 South Harlan Road <br /> French Camp, California 95231 <br /> WKA No 2088 05 <br /> Dear Mr Essick, <br /> We are submitting this quarterly ground water monitoring report summarizing our <br /> recent work at the above-referenced site (Plate 1) The purpose of our work is to <br /> J a <br /> comply with quarterly sampling requirements requested by the Central Valley <br /> Regional Water Quality Control Board (CVRWQCB) and the San Joaquin County <br /> Public Health Services Department (SJCPHS) <br /> r Geotechnical Engineering <br /> On August 10, 1995, ground water samples were obtained from the eight on-site <br /> Engineering Geology monitoring wells Prior to sampling, the wells were checked for visual signs of <br /> Environmental Consulting free product by using a clear, Teflon® bailer When free product was not <br /> observed, the wells were purged and sampled as described in Appendix A The <br /> ` Remediation Services <br /> water samples were analyzed for Total Petroleum Hydrocarbons (TPH) as gasoline <br /> Construction Inspection using EPA method 8015 modified and for Benzene, Toluene, Ethylbenzene, and <br /> Xylenes (BTEX) using EPA method 602 TPH as diesel was not analyzed at the <br /> ` Materials Testing request of Mr Harlin Knoll of the SJCPHS <br /> 1 <br /> Ground water measurements indicate ground water flow direction is to the <br /> 3050 Industrial Blvd northwest with a hydraulic gradient of approximately 0 005 feet/foot (see Plate 2) <br /> West Sacramento <br /> A historical summary of the ground water elevations measured during past <br /> CA 95691 sampling events is summarized in Table 1 <br /> �j Fax 916 372 2565 <br /> 916 372 1434 <br /> Recycled pnher <br />