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�1 <br /> ,� aquascience <br /> • . . P� I M.,r , - ► engineers inc. <br /> April 9, 2002 <br /> Mr Sid Guevera <br /> 7717 Airport Way <br /> Manteca, CA 95337 <br /> SUBJECT REPORT OF QUARTERLY OPERATION & MAINTENANCE <br /> OF REMEDIATION SYSTEM, GUEVERA PROPERTY <br /> 17717 AIRPORT WAY, MANTECA, CA <br /> In reference to. <br /> Frank's One Stop <br /> 2072 West Yosemite Avenue <br /> Manteca, California <br /> Dear Mr Guevera, <br /> On March 25, 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 two 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 house on the <br /> property <br /> On March 25, 2002 ASE collected three water samples as follows <br /> Sample Location <br /> Sample Id- <br /> Directly from the well, pre-treatment 17717-INF-03-25-02 j <br /> After treatment by the 1st carbon canister 17717-GAC 1-03-25-02 <br /> After treatment by the 2nd carbon canister 17717-GAC2-03-25-02 <br /> The samples were placed within an ice chest containing wet ice whale <br /> transported to Kaff 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 /> - 1 - <br /> 208 W El Pintodo, Danville, California 94526 • 92582&9391 • Fax 925-837-4853 <br />