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WALLACE • KUHL <br /> &ASSOCIATES INC January 4, 1996 <br /> Mr Hop Essick <br /> Granite Construction <br /> Post Office Box 151 <br /> Stockton, California 95201 <br /> QUARTERLY GROUND WATER MONITORING REPORT <br /> GRANI'T'E 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 /> S <br /> recent work at the above-referenced site (Plate 1) The purpose of our work is to <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 /> yf. Geotechnical Engineering <br /> Engineering Geology On December 6, 1995, ground water samples were obtained from the eight on-site <br /> low, <br /> � � monitoring wells Prior to sampling, the wells were checked for visual signs of <br /> Environmental Consulting <br /> free product by using a clear, Teflon bailer When free product was not <br /> Remediation Services observed, the wells were purged and sampled as described in Appendix A The <br /> water samples were analyzed for Total Petroleum Hydrocarbons as gasoline <br /> Construction Inspection <br /> (TPH-g) using EPA method 8015 modified and for Benzene, Toluene, <br /> l J' Materials Testing Ethylbenzene, and Xylenes (BTEX) using EPA method 602 <br /> H ` <br /> 5i <br /> Nk <br /> Ground water measurements indicate ground water flow direction is to the <br /> northwest with a hydraulic gradient of approximately 0 003 feet/foot (see Plate 2) <br /> I 3050 Industrial Blvd <br /> A historical summary of the ground water elevations measured during past <br /> West Sacramento <br /> sampling events is summarized in Table 1 <br /> CA 95691 <br />�~ Fax 916 372 2565 <br /> 916 372 1434 <br /> Recycled paper <br />