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ri <br /> r <br /> i0g'i <br /> 's <br /> CeoS4rategies Inc. (• -� YAN INC. <br /> G%;p 2140 WEST WINTON AVENUE CAMERAL LGt <br /> HAYWARD,CALIFORNIA 94545 I <br /> September 5, 1991 <br /> Gettler-Ryan Inc. <br /> 2150 West Winton Avenue <br /> Hayward, California <br /> I <br /> F <br /> Attn: Mr. Jeff Monroe <br /> t <br /> Re: WELL INSTALLATION REPORT <br /> i Chevron Service Station #1848 <br /> 1257 Yosemite Avenue <br /> Manteca, California <br /> i <br /> Gentlemen: <br /> ^� This well installation report by GeoStrategies Inc. (GSI) summarizes the ground' <br /> water monitoring well installatiors and sampling performed at the above- <br /> referenced location (Plate 1) as directed by Chevron U.S.A. Three exploratory <br /> soil borings were drilled on July 23, 1991, and completed as ground-water <br /> -I through C-3. Field work and laboratory <br /> monitoring wells designated C <br /> analysis were performed to comply with current State of California Water <br /> Resources Control Board guidelines. <br /> FIELD PROCEDURES <br /> The exploratory soil borings were drilled using a truck-mounted hollow-stem <br /> auger drill rig. A GSI geologist observed the drilling, described soil samples <br /> using the Unified Soil Classification System (ASTM D-2488) and Munsell Soil <br /> Color Chart, and prepared a lithologic log for each boring. The exploratory <br /> boring logs are presented in Appendix A. <br /> 728602-4 <br /> j <br />