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A ALTON <br /> Tlit*pV0L&ULT8MAM R E C Eal <br /> V E D <br /> November 27, 1991 , ALV 0 6 192 <br /> ENVIRONMENTAL HEALTH <br /> PERMIT/SERVICES <br /> Mr. Clint Rogers <br /> :hevron U.S.A. , Inc. <br /> ?oat Office Box 5004 310-355 <br /> San Ramon, California 94583-0804 <br /> Subject= Former Chevron Station ual Ground Water nNo. 9-7180itoring port <br /> 3246 East Fremont Street <br /> Stockton, California <br /> Dear Mr. Rogers: <br /> in accordance with our agreement, Alton Geoscience transmits <br /> this Annual Ground Water Monitoring and Sampling Report for <br /> f-�=.etr Chevron Station No. 9-7780, located at 3246 East <br /> Fremont Street, Stockton, California. Figure l shows the site <br /> location. <br /> Monitoring and sampling of the ground water monitoring wells <br /> . wac performed on october 18, 1991, in accordance with the <br /> requirements and procedures of the California Regional water <br /> Quality Control Board (RwQCB) and local regulatory agencies. <br /> FIELD PROCEDURES <br /> Prior to purging and sampling the wells, each well was checked <br /> for liquid-phase hydrocarbons or sheen. The depth to ground <br /> water from thedtopfofresent, free casing usingpanduct was electronicasured in interfaceewell <br /> probe <br /> with 0.01 foot tolerance. <br /> Ground water samples were collected after more than 3casing <br /> volumes of ground water was purged from each well. <br /> Ettah <br /> sample was collected using s clean bailer. Ground water <br /> samples were then decanted into the appropriate clean sample <br /> containers for delivery to a California-certified laboratory <br /> following proper preservation and chain of custody procedures. <br /> Purged ground water was stored onsite in DOT-approved, <br /> 55-gallon drums pending removal by Erickson Inc. , a licensed <br /> hauler. The purged ground waiter has transported as <br /> non-hazardous to Gibson oi.1/ pilot Petroleum of Redwood City, <br /> California for recycling. <br /> 1000 9usnett Avenue 5140 <br /> I'gOCOftl.CdLlOenit945N20 <br /> 14151682-IW+fAX 1415}642-8921 <br />