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WATERWORK CORP. <br /> A RESNA Company �--•-�- <br /> Environmental Solutions <br /> Through Applied Science, <br /> Engineering & Construction <br /> 1710 Main Street <br /> Escalon, CA 95320 <br /> Phone : (209) 838-3507 <br /> Fax : (209) 838-3509 <br /> December 6 , 1991 <br /> Mr. Michael Infuma <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> P. O . Box 2009 <br /> Stockton, California 95201 FLi 1 <br /> RE: King Island Resort <br /> 11530 W. Eight Mile Road , Stockton , California. <br /> Site Code: 1557 <br /> Dear Mr. Infuma: <br /> Enclosed are the latest analytical results and chain-of-custody documents for groundwater <br /> samples collected from the above referenced site. Groundwater monitoring and sampling was <br /> conducted by RESNA Industries personnel on October 18 , 1991 . Water level measurements <br /> were collected from each monitoring well prior to purging and sampling (Attachment 1 ) . Water <br /> levels have dropped from 0. 80 to 2 . 56 feet since last monitoring in April 1991 . A groundwater <br /> gradient map was created using the data collected on October 18 , 1991 (Figure 1) . The gradient <br /> is approximately 0 . 05 feet/feet or 264 feet/mile in a northeast direction. <br /> Subsequent to monitoring , each well was purged by extracting approximately 4 well volumes. <br /> While purging, the groundwater parameters (temperature, conductivity, and pH) were monitored <br /> and allowed to stabilize before water samples were collected. The samples were transported to <br /> and analyzed by state-certified Sequoia Analytical in Concord , California. <br /> Samples were analyzed for BTEX using EPA method 8020/602 and , TPHG and TPHD using <br /> modified EPA Method 8015 . Monitoring Well MW4 did not contain enough water to analyze <br /> for TPHD . Monitoring Wells MW 1 , MW2, and MW3 did not contain detectable concentrations <br /> of any petroleum hydrocarbon analyte. Monitoring wells MW4 and MW5 contained benzene <br /> concentrations of 690 and 1 , 300 µg/1 , respectively and TPHG concentrations of 3 ,400 and 4 ,400 <br /> µg/1 , respectively along with detectable T, E, X , and TPHD (MW5) . Laboratory reports with <br /> chain-of-custody documents are included in Attachment 2 . Table 2 summarizes laboratory <br /> analyses. <br /> KIRL1209.TLP <br />