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1386 EAST BEAMER STREET <br /> w-e7G-E ESTE'RN WOODLAND, CA 95695-9603 <br /> GEO ENGINEERS FAX (916) 662-0273 <br /> CALIF CONTRACTOR 0 513857 A CORPORATION (916) 668-5300 <br /> REGISTERED GEOLOGISTS <br /> Mr. Srikanth Dasappa October 19, 1992 <br /> USA Petroleum Corporation <br /> P.O. Box 1839, <br /> Santa Monica, California 90406 <br /> (310 ) 452-6200 Fax ( 310 ) 450-4020 <br /> RE Sampling and documentation of MW4 at USA Petroleum, Station <br /> #65, 2500 West Lodi Avenue, Lodi, CA for USA PETROLEM CORPORATION. <br /> LOCATION <br /> The site, USA Petroleum, Station #65 is located at 2500 West Lodz <br /> Avenue, Lodi, California and lies in Sec. 10; T3S; R6E; MDB&M at <br /> an elevation of approximately 371 . <br /> PURPOSE & SCOPE <br /> To sample, document and chain-of-custody deliver the water samples <br /> from MW4 to a State of California certified laboratory. MW4 had <br /> been paved over by asphalt and was not sampled during the most <br /> recent quarterly monitoring, this well was restored to operable <br /> condition by Western Geo-Engineers on September 15 , 1992 . <br /> PROCEDURES <br /> The ground water was sampled in the monitoring well (MW4 ) by a <br /> Western Geo-Engineers (WEGE) geo-technician, working directly <br /> under the supervision of California Registered Geologist #3037 , on <br /> October 9 , 1992 Surface elevation, depth to water and ground <br /> water elevation were recorded for the well (WEGE: TABLE 1) . <br /> Western Geo--Engineers took a ground water sample of MW4 on October <br /> 9 , 1992 after purging the well of enough water that temperature, <br /> pH and conductivity stabilized (see Field Notes in Appendix A) ; <br /> the "purged" water was "contained" in a labeled, secured 55 gallon <br /> drum on site. After purging, the well was allowed to recover, a <br /> bailer was used to collect the sample. The BTEX sample and TFH <br /> sample were placed in four 40 milliliter vials. ^ These" bottles are <br /> supplied pre-cleaned to exact EPA protocols by the laboratory. <br /> The samples were labeled as to station, well , time, and sampler, <br /> and documented on the chain-of-custody sheet, then placed into an <br /> ice chest and cooled to 4°C with ice. The samples were delivered <br /> to a Matrix Environmental Laboratories (DHS# 1676 ) and chain-cf- <br /> custody signed over to the gab <br /> 1 <br />