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s ' <br /> i; Environmental <br /> r4 <br /> Resources <br /> Management <br /> 1 ; <br /> ;1777 Batelho Drive <br /> Suite 260 <br /> 1 {19nut Creek,CA 94596 <br /> i' (925)946-0455 <br /> #; 9 February 2000 (925)946-9968(Fax) <br /> Mr. Marty Hartzell <br /> California Regional Water <br /> g Quality Control Board , <br /> Central Valley Region <br /> i� 3443 Routier Road,Suite A ER1Vlo <br /> Sacramento, CA 95827-3015 <br /> Subject: Supplemental Information <br /> 1325 and 1515 West Weber Avenue <br />} Stockton, California IF <br /> Dear Mr. Hartzell: <br /> N <br /> i 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 inform <br /> ation"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). <br /> �a p <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 /> 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 /> P �I <br />