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6ETTLER - RYAN INC. <br /> December 7 2000 <br /> Mr David Camille <br /> Tosco Marketing Company <br /> 2000 Crow Canyon Place, Suite 400 <br /> San Rarnon, Califomia 94583 <br /> RE First Weekly Event of November 16, 2000 <br /> Groundwater Puj ging and Disposal <br /> Tosco (For mer BP) Station No 11192 <br /> 1403 Country Club Boulewn d <br /> Stockton, California <br /> Mr Camille <br /> At the request of Tosco Marketing Company (Tosco), Getticr-Ryan Inc (GR) has prepared this report to <br /> document groundwater sampling purging and disposal conducted for the subject site The work was <br /> performed in accordance the GR s Work Plan for G onnchvawe Purging and Disposal dated September 6, <br /> 2000, and with the San Joaquin County Envie onmental Health Division correspondence dated November 2, <br /> 2000 <br /> Activities documented in this first xvxkly report included monitoring static depth to water in monitoring <br /> «ells MW-1, and MW-3 through MW-7 collecting a grab groundwater sample from MW-3 removing <br /> approximately 3000 gallons of groundwater from MW-3 and MW-7, monitoring the effect of the <br /> groundN�ater removal on the static water levels in other monitoring wells on site, collecting a sample, from <br /> the purged ground%Nater monitonng Nvater level recovery in MW-3 and collecting a groundwater sample <br /> from MW-3 following the groundwater purging <br /> Groundwater Removal and Dr;posal <br /> On November 16, 2000, apprommateiv 3,000 gallons of groundwater NNeie removed from monitoring <br /> wells MW-3 and MW-7 by On\\ Industrial Services (Onvy) of Benicia California The groundwater <br /> was purged directlN from the wells into the Oma vacuunn truck and transported to the Tosco Refincr� <br /> in Rodeo California for disposal <br /> Groundwater Sampling <br /> Groundwater samples NNcre collected from MW-3 prior to and folloN\mg purging A water sample was also <br /> collected from the purged groundx\atei pnoi to its removal from site Groundwater samples are submitted <br /> under Chain of Custody for analysis at Sequoia Analytical (FLAP 4 1271) Groundwater samples are <br /> analyzed for Total Petroleum Hydrocai bons as Gasoline, (TPHg) b\ EPA Method 8015, benzene, toluene, <br /> ethylbenzene, and xylenes (BTEX) by EPA Method 8020, and methyl tort-butyl ether (MTBE) by EPA <br /> Method 8260 The analytical results for the November 16 2000 sampling event arc summarized in Table 1 <br /> 6747 Sierra Court , Suite J a Dublin , California 94568 ( 925 ) 551 - 7555 <br />