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3164 Gold Camp Drive <br /> Delta Suite 200 <br /> llnk Co Rancho Cordova CA 95670 <br /> Enrnronmental <br /> 916/638-2085 <br /> resultants,Inc FAX 9161638-8385 <br /> May 3, 1996 <br /> Ms Marla Guensler <br /> Exxon Company, U S A <br /> 2300 Clayton Road, Suite 490 J U L 15 1996 <br /> Concord, California 94520 <br /> ENVIRONMENTAL HEALTH <br /> Subject Quarterly Ground Water Monitonng Report, Second Quarter 1996 PERMIT/SERVICES <br /> Fortner Exxon Service Station No 7-3708 <br /> 2705 Country Club Boulevard <br /> Stockton, California <br /> Delta Project No D093-809 <br /> Dear Ms Guensler <br />• Delta Environmental Consultants, Inc (Delta), has been authorized by Exxon Company, <br /> U S A (Exxon), to conduct quarterly ground water monitoring at former Exxon Service Station <br /> No 7-3708, located at 2705 Country Club Boulevard, Stockton, California This letter report <br /> presents the results of quarterly ground water monitoring and sampling conducted on,A r�i12,_19Sfi� <br /> First quarter ground water sampling activities could not be conducted due to station reconstruction <br /> activities The location of the site is shown in Figure 1 and site features are illustrated in Figure 2 <br /> The work conducted at the site by Delta was performed in accordance with the field methods and <br /> procedures described in Enclosure A <br /> Ground Water Table Elevation Flow Direction and Hydraulic Gradient <br /> Depth to ground water was measured in seven of the eight ground water monitoring wells at the site <br /> on April 2, 1996 Monitoring well MW-7 was inaccessible during the April site visit Depth to <br /> ground water in the measured wells, ranged from 5 78 (MW-5) to 8 63 (MW-2) feet below the top <br /> of the well casings Ground water table elevations have increased approximately 5 feet since the <br /> previous monitoring event conducted in October 1995 Cumulative ground water table measurements <br /> are presented in Table 1 A water table contour map constructed from the measurements recorded <br /> on April 2, 1996, is included as Figure 3 The water table contours indicate ground water at the site <br /> generally flowed toward the northeast with an isolated high spot in the vicinity of M - The <br /> hydraulic gradient at the site was less l sse than 0 01, which is consistent with previous data <br /> Subiechve Analysis <br /> No liquid-phase petroleum hydrocarbons or hydrocarbon sheens were present in the wells during the 2 <br /> April 1995 site visit <br /> Analytical Results <br /> Ground water samples collected from monitoring wells MW-1 through MW-6, and MW-8 on <br /> April 2, 1996, were submitted to Sequoia Analytical (a California-certified laboratory) for analysis <br />