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r <br /> Working To Restore Nature <br /> 1710 Main Street <br /> "t .lsn ?0 :i i 52 <br /> Escalon, CA 95320 <br /> Phone (209) 838-3507 <br /> FAX (209) 838-3509 <br /> January 18, 1994 <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 /> Subject Fourth Quarter 1993 Groundwater Monitoring Report <br /> King Island Resort Site Code 1557 <br /> 11530 W Eight Mile Road, Stockton, California <br />�1 <br /> Dear Mr Infurna <br /> This letter report is to present results of fourth quarter 1993 monitoring and sampling activities at <br /> 11530 West Eight Mile Road, Stockton, California (Figure 1) <br /> GROUNDWATER MONITORING <br /> Groundwater monitoring and sampling was conducted by RESNA personnel on December 23, 1993 <br /> Water level measurements were collected from each monitoring well prior to purging and sampling <br /> Water levels rose an average of 0 71 feet since the last monitoring event in September 1993 (Table <br /> 1) A groundwater gradient map was created using the data collected on December 23, 1993 (Figure <br /> 2) Groundwater flow was to the northeast, away from the slough, with a gradient of 0 07 feet/foot <br /> Subsequent to monitoring, each well was purged by extracting approximately 3 well casing volumes <br /> While purging, the groundwater parameters (temperature, conductivity, and pH) were monitored and <br /> allowed to stabilize before water samples were collected Samples were collected using dedicated, <br /> disposable bailers with bottom emptying devices to reduce volatilization The samples were <br /> transported to and analyzed by state-certified Argon Mobile Labs in Ceres, California All purged <br /> groundwater was contained in DOT approved 55 gallon drums and remains on site pending appropriate <br /> disposal Groundwater monitoring data and well purge logs are included in Attachment 1 <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 hydrocarbons <br /> as diesel (TPHd) using modified EPA Method 8015 Analytical results are summarized in Table 2 <br /> Monitoring wells MWl through MW4 did not contain detectable concentrations of petroleum <br /> OW036714QR-1943 FNL <br />