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Virgil Chavez Land Surveying <br /> Georgia Street, Suite 225 January 27,2003 <br /> �Ilejo, California 94590-5907 Project No.: 2119-03 <br /> (707) 553-2476 Fax(707) 553-8698 <br /> Andrew Smith <br /> Gettler-Ryan Inc. <br /> 6747 Sierra Court, Suite J <br /> Dublin, CA 94568 <br /> Subject: Monitoring Well Survey <br /> Tosco Service Station No. 11195 <br /> 16500 South Interstate 5 <br /> Lathrop, CA <br /> Dear Andrew: <br /> This is to confirm that we have proceeded at your request to survey the ground water <br /> monitoring wells located at the above referenced location. The survey was completed on <br /> January 25, 2003. The benchmark for this survey was a brass disk at the southeast corner <br /> of Harlan and Louise Streets. The latitude, longitude and coordinates are for top of <br /> casings and are based on the California State Coordinate System, Zone III (NAD83). <br /> Benchmark Elevation= 14.77 feet (NGVD 29). <br /> Latitude Longitude Northing, Eastin Elev. Desc. <br /> 12.65 R1M MW-18 <br /> 38.0023026 '. -121.2962299 2188400.50 6332246.12 12.29 TOC MW-18 <br /> 13.19 RIM MW-19 <br /> 3B.0022987 -121.2966841 2188400.20 6332115.26 12.84 TOC MW-19 <br /> 12.88 RIM MW-20 <br /> 38.0019631 -121.2973808 21BB279.70 6331913.47 12.54 TOC MW-20 <br /> 12.97 RIM MW-21 <br /> 38.0015995 -121.297B062 21BB14B.33 6331789.79 12.80 TOC MW-21 <br /> Sincerely, <br /> No. 6323 <br /> Virgil D. haven, PLS 6323 <br /> e4 <br /> , OfCA�IF�'4 <br />