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WorEung To Restore Nature <br /> 1710 Main Street <br /> Escalon, CA 95320 <br /> Phone (209) 838-3507 <br /> FAX (209) 838-3509 <br /> July 15, 1993 <br /> Mr. Michael Infurna <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> P.O. Box 2009 <br /> Stockton, California 95201 <br /> RE: Second Quarter 1993 Groundwater Monitoring Report and Workplan Addendum, King <br /> Island Resort, 11530 W Eight Mile Road, Stockton, California Site Code: 1557 <br /> Dear Mr. Infurna- <br /> Enclosed are the Second <br /> Quarter 1993 groundwater monitoring results for the above referenced <br /> site (Figure 1). Groundwater monitoring and sampling was conducted by RESNA Industries, <br /> Inc (RESNA)personnel on June 28, 1993 Water level measurements were collected from each <br /> morutoring well prior to purging and sampling (Attachment 1) Water levels have dropped an <br /> average of 1.47 feet since the last monitoring event in March 1993 (Table 1). A groundwater <br /> gradient map was created using the data collected on June 28, 1993 (Figure 2). Groundwater <br /> flows northeast, away from the slough, with a gradient of 0 065 feet/foot or approximately 340 <br /> feet/nule. <br /> Subsequent to monitoring, each well (MW1 - MWS) was purged by extracting approximately <br /> 3 well casing volumes While purging, the groundwater parameters (temperature, conductivity, <br /> and pH) were monitored and allowed to stabilize before water samples were collected. The <br /> samples were transported to and analyzed by state-certified Argon Mobile Ubs in Ceres, <br /> California. All purged groundwater was contained in DOT approved 55 gallon drums and <br /> remains on site pending appropriate disposal <br /> Samples were analyzed for benzene, toluene, ethylbenzene, and total xylenes (BTEX) using EPA <br /> Method 8020, and total petroleum hydrocarbons as gasoline (TPHG) and total petroleum <br /> hydrocarbons as diesel (TPHD) using modified EPA Method 8015. Monitorng Wells MW1, <br /> MW2, and MW3 did not contain detectable concentrations of the petroleum hydrocarbon <br />. constituents Monitoring wells MW4 and MW5 contained low to moderate levels of BTEX and <br /> 2QR-1943 FNL <br /> !ol <br />