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_ WU49s IVC <br /> .r ► w I . e�l�jll t <br /> 03fB 17 PM 12: 53 <br /> MAR, <br /> March 10, 2003 <br /> Mr Robert Mack <br /> 17821 Airport Way <br /> Manteca, CA 95337 <br /> SUBJECT REPORT OF SEMI-ANNUAL OPERATION & MAINTENANCE <br /> OF REMEDIATION SYSTEM, MACK PROPERTY <br /> 17821 AIRPORT WAY, MANTECA, CA <br /> In reference to. <br /> Frank's One Stop <br /> 2072 West Yosemite Avenue <br /> Manteca, California <br /> Dear Mr Mack, <br /> On January 16, 2003, Aqua Science Engineers, Inc (ASE) arrived at the <br /> . subject site to perform routine operation and maintenance (O&M) <br /> activities in relation to the domestic well remediation system operating at <br /> 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 January 16, 2003 ASE collected three water samples as follows <br /> Sample Location Sample, Id <br /> Directly from the well, pre-treatment 17821-INF-01 -16-03 <br /> After treatment by the 1st carbon canister 17 821-GAC 1-01-16-03 <br /> After treatment by the 2nd carbon canister 17821-GAC2-01- 16-03 <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 /> 208 W El Pintado, Danville, California 94526 m 925 82a9391 . Fax 925 837-4853 <br />