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Ms Margaret Lagorio <br /> Page 3 of 3 <br /> RECOMMENDATIONS <br /> Ground Zero recommends that San Joaquin County Environmental Health Department (EHD) <br /> consider closing this site as a low-risk groundwater contamination case based upon the following <br /> • The current levels of gasoline constituents in site wells are below applicable primary and <br /> secondary MCLs, <br /> • No MTBE has ever been detected in any site well, r <br /> • The nearest known active water supply well is located approximately 1,100 feet upgradient of <br /> the site and is screened from depths greater than 340 feet (Ground Zero, August 23, 2002), <br /> • The primary and secondary contamination sources have been removed in the form of UST <br /> removal and overexcavation <br /> Please feel free to contact Ground Zero at (209) 838-9888 if you have any questions regarding <br /> this submittal <br /> Respectfully, <br /> Ground Zero Analysis, Inc <br /> iney � .fOHI`l P min <br /> Staff Geologist p —� <br /> o U NE <br /> No 6795 <br /> John P Lane <br /> CA Registered Geologist No 6795 Op CAS` <br /> Attachments <br /> cc Ms Karen Collins, Environmental Closures <br /> Mr Marty Hartzell, RWQCB <br /> Mr Pat Riddle, Esq <br /> Mr Mike Souza, Souza II, LLC <br /> GIData1GRQUNDZE\Souza\Reportsl4QMR_2002 doc <br />