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0-5 <br /> r iyquq sciencemr� I M-F I engineers Inc <br /> r <br /> • �f -f� <br /> June 18, 2002 L�> <br /> Ms Zoe Haworth <br /> 24550 S Brown Road <br /> Manteca, CA 95337 <br /> SUBJECT REPORT OF QUARTERLY OPERATION & MAINTENANCE <br /> OF REMEDIATION SYSTEM, HAWORTH PROPERTY <br /> 17950 AIRPORT WAY, MANTECA, CA <br /> In referCDCe to, <br /> Frank's One Stop <br /> 2072 West Yosemite Avenue <br /> Manteca, California <br /> Dear Ms Haworth, <br /> On May 14, 2002, Aqua Science Engineers, Inc (ASE) arrived at the <br /> subject site to perform routine quarterly operation and maintenance <br /> (O&M) activities in relation to the domestic well remediation system <br /> operating at the site <br /> The domestic well remediation system consists of a residential air stripper <br /> followed by two 250-pound granulated activated carbon (GAC) canisters <br /> plumbed in series Groundwater is pumped from the well, through the <br /> holding tank, into the air stripper for initial treatment, then into the <br /> carbon canisters for a final polish prior to entry into the houses on the <br /> property <br /> On May 14, 2002 ASE collected four water samples as follows <br /> Sample Location Sample _Icl_ <br /> Directly from the well, pre-treatment 17950-INF-05-14-02 <br /> After treatment by the air stripper 17950-AS-05-14-02 <br /> After treatment by the 1st carbon canister 17950-GAC 1-05-14-02 <br /> After treatment by the 2nd carbon canister 17950-GAC2-05-14-02 <br /> The samples were placed within an ice chest containing wet ice while <br /> transported to Kiff Analytical of Davis, California (ELAP# 2236) under <br /> chain of custody procedures The samples were analyzed for total <br /> petroleum hydrocarbons as gasoline (TPH-G), benzene, toluene, <br /> - 1 - <br /> 208 W El Pintodo, Dano le, Cabfama 94526 0 925 820-9391 o Fax 925 8374853 <br />