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I <br /> •1 r <br /> ® q aquoq science <br /> January 29, 2003 <br /> Ms Karin Meyer <br /> 370 N Main Street <br /> Manteca, CA 95336 <br /> SUBJECT REPORT OF SEMI-ANNUAL OPERATION & MAINTENANCE <br /> OF REMEDIATION SYSTEM, MEYER PROPERTY <br /> 17911 AIRPORT WAY, MANTECA, CA <br /> In reference to. <br /> Frank's One Stop <br /> 2072 West Yosemite Avenue <br /> Manteca, California <br /> Dear Ms Meyer, <br /> On December 13, 2002, Aqua Science Engineers, Inc (ASE) arrived at the <br /> subject site to perform routine semi-annual 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 December 13, 2002 ASE collected three water samples as follows <br /> Sample Location Sample Id. <br /> Directly from the well, pre-treatment 17911-INF-12- 13-02 <br /> After treatment by the 1st carbon canister 17911-GAC 1-12-13-02 <br /> After treatment by the 2nd carbon canister 17911-GAC2- 12-13-02 <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 /> _ 1 _ <br /> ?08 't/v E1 Pintado, Dcmv,lle, Californa 94526 a 925820-9391 o Fox 025-8374853 <br />