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Working to Restore Nature <br /> 1710 Main Street LCEIVE D r <br /> Escalon, CA 95320 OCT 3 0 1992 <br /> Phone (209) 838-3507 �/ <br /> FAX (209)838-3509 FENVIRONMENTAL HEALTH <br /> PERMIVSERVICE� October 26, 1992 <br /> Mr Michael Infuma <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> P O Box 2009 <br /> Stockton, California 95201 <br /> RE Third Quarter 1992 Groundwater Monitoring Report, King Island Resort, 11530 <br /> W Eight Mile Road, Stockton, CA Site Code 1557 <br /> Dear Mr Infurna 1 <br /> . Enclosed are the Third Quarter 1992 groundwater monitoring results for the above referenced <br /> site Groundwater monitoring and sampling was conducted by RESNA Industries, Inc <br /> (RESNA) personnel on September 10, 1992 Water level measurements were collected from <br /> each monitoring well prior to purging and sampling (Attachment 1) Water levels have <br /> decreased an average of 0 77 feet since the last monitoring event in April 1992 (Table 1) A <br /> groundwater gradient map was calculated using the data collected on September 10, 1992 (Figure <br /> 1) The gradient is approximately 0 07 feet/feet or 370 feet/mile in a northeast direction <br /> Monitoring well MW4 was not included in the gradient calculation due to the presence of mud <br /> and silt in the well <br /> Subsequent to monitoring, wells MW1, MW2, MW3, and MW5 were purged by extracting a <br /> minimum of 3 well volumes While purging, the groundwater parameters (temperature, <br /> conductivity, and pH) were monitored and allowed to stabilize before water samples were <br /> collected The samples were transported to and analyzed by state-certified RESNA <br /> Environmental Laboratories in Fremont, California No sample was analyzed from well MW4 <br /> due to the presence of mud and silt in the well <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 Monitoring Wells MW1, <br /> MW2, and MW3 did not contain detectable concentrations of any petroleum hydrocarbon <br /> i <br /> QR091592 FNL <br />