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3 �1 <br /> Chevron <br /> - , ° Chevron <br /> r r �,"' r.RVlt. <br /> f t'i�� s!I w<< <br /> S3 SSP 15 PH 2: 03 <br /> Chevron U S A Products Company <br /> 2410 Camino Ramon <br /> September 12, 1993 San Ramon CA 94583 <br /> Marketing Department <br /> Phone 510 842 9500 <br /> Mr Harlin Knoll <br /> San Joaquin County Environmental Health <br /> P O Box 2009 <br /> Stockton, CA 95201 <br /> Re Former Chevron Station# 9-0342, 1347 S El Dorado Street, Stockton, CA <br /> Attached groundwater monitoring report(GTI,3110193) <br /> Attached groundwater monitoring report(GTI, 6125193) <br /> Dear Mr Knoll <br /> Attached are reports dated March 10, 1993 and June 25, 1993, w1mch were prepared by Chevron's <br /> . consultant, Groundwater Technology Inc (GTI), to describe groundwater monitoring performed at <br /> the subject site on February 16, 1993 and May 17, 1993 <br /> The depth to water was measured in three of the four groundwater monitoring wells during the <br /> February site monitoring event Monitoring well MW-1 appeared to be covered by recent building <br /> construction The measured direction of groundwater flow was toward the northeast Groundwater <br /> samples from MW-2, -3, and MW-4 were analyzed for the presence of TPHGas and BTEX <br /> constituents These constituents were only detected in samples from MW-3 <br /> During the May site monitoring event only two groundwater monitoring wells were accessible <br /> Depth to groundwater was measured and samples were collected from wells MW-3 and MW-4 <br /> Monitoring well MW-1 appeared to be covered by the recently constructed building Monitoring <br /> well MW-2 was buned beneath construction debris <br /> The inferred direction of groundwater flow was toward the northeast Detectable concentrations of <br /> TPHGas and BTEX were measured 1n MW-3 and MW-4 The observed increase in dissolved <br /> hydrocarbon concentrations was coincident with an approximate three foot rise in groundwater <br /> elevation beneath the site <br /> Chevron will proceed with the abandonment of monitoring well MW-1 as soon as access to the <br /> well is obtained Our many efforts to coordinate well access with Mr Angelo Fannos (construction <br /> contractor) have been ignored If our attempts to gain access through the current property owner <br /> (Mr Ramon Guerrero) are not successful, Chevron will then request the assistance of the San <br /> Joaquin Public Health Services in pursuit of this matter <br /> If you have any questions or comments, I can be reached at(510) 842-8695 <br />