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MViuo <br /> _ <br /> - ` ;.' ,"• = Working To Restore Nature <br /> 1710 Main Street <br /> Escalon, CA 95320 <br /> 'hone: (209) 838-3507 <br /> =AX: (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 /> Dear Mr. Infurna: <br /> This letter report is to present results of fourth quarter 1991) . <br /> monitoring and sampling activities at <br /> 11530 West Eight Mile Road , Stockton , California (Figure <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 I . <br /> using EPA <br /> Samples were analyzed for benzene , toluene , ethylbenzene , and total xylenes (BTEX) g <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 <br /> petroleum <br /> OW036T4QR-1993 .FNL CY <br />