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GRI � N <br /> Orton Environmental Inc, <br /> Q(345o E Spring St,Suite 212 562 988-2755 PHONF <br /> r Long Bt-ach,CA 9o8o6 562 988-2759 FAX <br />!II 0 Box 455 707 963-8982 PHONF <br /> 7 July 2000 Rutherford,CA 94573 707 963-8983 FAX <br />{ Project No 1 1 ST <br /> Mr Harlin Knoll, Senior REHS <br /> Site Mitigation Unit <br /> San Joaquin County Environmental Health Division <br /> 304 East Weber Avenue, Third Floor <br /> Stockton, California 95202 <br /> I <br /> Subject: Letter Report for Installation of Groundwater Monitoring Wells, <br /> I Groundwater Monitoring, and Site Closure Request <br /> 400 North EI Dorado Street, Stockton, California <br /> PIN 127434 <br /> Dear Mr Knoll <br /> Bridgestone/Firestone, Inc (BFS), has retained Orion Environmental Inc (Orion) to <br /> . conduct groundwater assessment activities at the former BFS facility at 400 North EI <br /> Dorado Street in Stockton, California (the site, Figure 1) This document summarizes the <br /> activities conducted to delineate the nature and extent of impacted groundwater at the <br /> site <br /> This report has been prepared in accordance with Orion's Work Plan for Groundwater <br /> Assessment dated 27 October 1999 and a letter from the San Joaquin County <br /> Environmental Health Division (SJCEHD) dated 30 August 1999 The following <br /> paragraphs provide a description of the site, summary of previous investigations, <br />' reporting of groundwater well installation and monitoring, and rationale for site closure <br /> 1 Site Description <br /> The site is the former location of an automobile gasoline station that operated during the <br /> 1920's and 1930's After this period the site was used as a retail tire and automobile <br /> service center In 1967, four underground storage tanks (USTs) were closed in place by <br /> filling the tanks with sand In 1991, one of these previously closed tanks was removed <br /> from the site along with eleven other USTs previously located at the site The remaining <br /> tanks include Tank #1 and #3 (7,590-gallon capacity each) and Tank #2 (550-gallon <br /> capacity) <br /> S\13FS\ST0CKT0N\Lf1Z\LTR004 DOC 7/7/00 <br />