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*C �`=� <br /> L-EARWATE <br /> G R O U P, I N C <br /> Envrronrnenfnl Services <br /> Mrs Stella Ruiz September 18, 1998 <br /> 4491 West Durham Ferry Road <br /> Tracy, CA 95376 <br /> Re Rutz Grocery,4491 West Durham Ferry Road,Tracy,CA <br /> Dear Mrs Rutz, <br /> Enclosed please find a copy of Clearwater Group, Inc 's (CIearwater's) Quarterly Groundwater Monitoring Report- <br /> Third Quarter 1998 for your site The report presents the results of groundwater monitoring activities performed in <br /> August 1998 Results were generally consistent with those observed previously <br /> Please note that all wells were tested for Fuel Oxygenates (MTBE, ETBE, TBA, DIPS, TAME) by EPA Method <br /> 8240 as requested by the San Joaquin Public Health Services/Environmental Health Department However, MTBE <br /> • was the only oxygenate detected in groundwater beneath the site As such, Clearwater recommends deleting the LPA <br /> Method 8240 analysis from future groundwater monitoring events MTBE concentrations can continued to be <br /> monitored by EPA Method 8020, which is used to also detect aromatic hydrocarbon compounds (t e benzene, <br /> ethylbenzene,toluene, and xylene isomers) <br /> As you are aware, remedial system installation is complete and equipment delivery is scheduled by the end of <br /> September The system shoula be operational shortly thereafter If you have any questions about the project or <br /> sc,heduhng,please feel free to call either myself or Mr Henry Hurkmans <br /> Sincerely, <br /> Clearwater Group, Inc <br /> Brian Gwinn, R G <br /> Project Geologist <br /> enclosure <br /> cc Ms Laura Duncan, SJCPHS/EHD <br /> • Ms Elizabeth Thayer,CVRWQCB <br /> 520 Third Street Suite 104 o Oakland,California 94607 o Telephone 510-893-5160 *r Fa\510-593-5947 <br />