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s <br /> v1117 Lone Palm Avenue <br /> Q _ Suite 6 = <br /> Modesto CA 95351 <br /> 209 579 2221 <br /> Fax 209 579 2225 <br /> A S S O C I A T E S I N C <br /> f <br /> February 25, 1999 <br /> 62514 <br /> Mr Michael Infuma <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> 304 East Weber Avenue, 3rd Floor <br /> Stockton, CA 95202 <br /> Subjedt Fourth Quarter 1998 Groundwater Monitoring Report for King Island Resort, 11530 <br /> West Eight Mile Road, Stockton, California Site Code 1557 <br /> Mr Infurna <br /> This letter report Is presented to update site activities performed during fourth quarter 1998 at 11530 <br /> West Eight Mlle Road, Stockton, California (Figure 1) Site activities included quarterly groundwater <br /> monitoring and sampling, well box repair, and resurveying well elevations <br /> GROUNDWATER MONITORING <br /> The fourth quarter groundwater momtonng and sampling of monitoring wells MW 1 through MW6 <br /> was conducted by ATC Associates Inc personnel on December 14, 1998 Water level measurements <br /> were collected from all monitoring wells prior to purging and sampling Well locations are shown on <br /> Figure 2 <br /> Subsequent to monitoring, each well was purged by extracting a mivmum of three well casing volumes <br /> of groundwater While purging, groundwater parameters (temperature, conductivity, and pH) were <br /> monitored and allowed to stabilize before water samples were collected Samples were collected using <br /> dedicated, disposable bailers with bottom emptying devices to reduce volatilization All purged <br /> groundwater was contained in 55-gallon drums approved for hazardous liquid storage on-site pending <br /> appropriate disposal Groundwater well purge and sample logs are contained in Attachment 1 <br /> The groundwater samples collected from each well were placed on Ice and transported under <br /> chain-of-custody documentation to Sequoia Analytical (FLAP #1210) in Redwood City, California <br /> The groundwater samples were analyzed for total petroleum hydrocarbons as diesel (TPHd), total <br /> petroleum hydrocarbons as gasoline (TPHg), benzene, toluene, ethylbenzene, and xylenes <br /> (BTEX) and methyl tertiary butyl ether (MTBE) utilizing EPA methods 8015/8020 <br /> w%25141quardy14g-1998 dw 1 <br />