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vatef'G� VU "EJU 13:13 VAA 1YZOU4bUVU6 hxnvYh*b'1 WU WJUuc <br /> Environmental <br /> Resources <br /> Management <br /> 1777 Eotelho Drive <br /> Suite 260 <br /> Walnut Creek,CA 94596 <br /> (925)945-0455 <br /> t (925)946996$(Fax) <br /> 9 February 2000 ; <br /> Mr. Marty Hartzell <br /> California Regional Water Quality Control Board <br /> Central Valley Region <br /> 3443 Routier Road,Suite A ER1VIO <br /> Sacramento,CA 95827-3015 <br /> Supplemental Subject: Information <br /> bJ <br /> 1325 and 1515 West Weber Avenue <br /> Stockton,California <br /> Dear Mr. Hartzell: <br /> On behalf of Catellus Development Corporation(Catellus),ERM submits <br /> the enclosed technical memoranda for the subject properties in response <br /> to your 21 December 1999 request for additional information to support <br /> your evaluation of the Request for Site Closure Concurrence(San Joaquin <br /> County Public Health Services Environmental Health Division, ' <br /> December 1999). I� <br /> a <br /> Specifically,these memoranda address: <br /> 1. The potential presence of ground water wells within a 2,000-foot <br /> } radius of the site; <br /> 2. An estimate of the volume of contamination remaining;in the,ground <br /> # water; <br /> 3. An estimate of the length of time it will take residual ground water <br /> concentrations to achieve water quality standards; and' <br /> I 4. A health risk assessment for site soils and ground water. <br /> Additional requested information regarding the July 1999 !ground water <br /> sampling procedures was previously provided via facsimile. Please feel <br /> I ` <br /> t <br />