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cq ucscience <br /> engineers Iffir <br /> May 9, 2002 <br /> Mr Thomas Wilson <br /> 821 West Yosemite Avenue <br /> Manteca, CA 95337 <br /> SUBJECT REPORT OF QUARTERLY OPERATION & MAINTENANCE <br /> OF REMEDIATION SYSTEM, WILSON PROPERTY <br /> 17899 AIRPORT WAY, MANTECA, CA <br /> In reference to_ <br /> Frank's One Stop <br /> 2072 West Yosemite Avenue <br /> Manteca, California <br /> Dear Mr Wilson, <br /> On April 19, 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 three 250-pound <br /> granulated activated carbon (GAC) canisters plumbed in series <br /> Groundwater is pumped from the well, into the holding tank, then <br /> through the carbon canisters prior to entry into the houses on the <br /> property <br /> On April 19, 2002 ASE collected three water samples as follows <br /> Sample Location Sample LL <br /> Directly from the well, pre-treatment 17899-INF-04-19-02 <br /> After treatment by the Ist carbon canister 17899-GAC1-04-19-02 <br /> After treatment by the 2nd carbon canister 17899--GAC2-04-19-02 <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 /> ethylbenzene, and xylenes (collectively known as BTEX), the five fuel <br /> oxygenates, and lead scavengers by EPA Method 8260B A copy of the <br /> - t - <br /> %�'� W rr F­ludo Dan0fe coir foanio 94,526 o 925 820-9391 o Fox 925-837-4853 <br />