SITE INFORMATION AND CORRESPONDENCE

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PUBLIC HEALTH SERVICES SAN JOAQUIN COUNTY I ENVIRONMENTAL HEAL 17H DIVISION ♦•. r. Karen Furst, M.D., M.P.H., Health Officer.. ,} Lrr`oRR' 304 East Weber Avenue,Third Floor • Stockton, CA 95202 2091468-342 PAUL SUPPLE KITTY WALKER ARCO PRODUCTS COMPANY COS REDEVELOPMENT AGENCY P O BOX 6549 305 N EL DORADO STREET MORAGA CA 94570 STOCKTON CA 95202 RE: Former Arco Station #4493 205 N. Center Street Stockton CA 95202 The former Arco Station #4493 (Arco site) is a liste contaminated site assigned to the Local Oversight Program (LOP) of San Joaquin County Public Health Services, Environmental Health Division (PHSIEHD). The purpose of the LC P is to provide oversight of assessment and clean up activities at contaminated undergroun I storage tank sites. As the responsible parties to the Arco site you have been informed in writing that routine quarterly groundwater monitoring and sampling must continue until otherwise directed by PHSIEHD (see PHSIEHD correspondence dated October 6, 2000). Routine quarterly groundwater monitoring and sampling have not occurred at this site since November 2000. Construction activities in the area have prevented access to the sites monitoring wells. This means that you are currently out of compliance with regulatory directives. In correspondence dated April 19, 2001 PHSIEHD responded to the Public Notice of Intent for the Weber Point Master Development Plan Proj ct that had been submitted to this agency by the City of Stockton. Our letter stated that construction activities in the area must not compromise the integrity of any of the monitoririg wells associated with this site. A map was included with the correspondence showing thE locations of the wells. The City was further informed that if there was a possibility of damaging any of the wells, the wells should be properly destroyed beforehand and replaced when construction is complete. On July 17, 2001 PHSIEHD, accompanied by a representative from SECOR International, Incorporated (ARCO's consultant), conducted a sit walk to determine which monitoring wells were still accessible. Of the seven monitoring wells that have been installed to date, only two were located. Those-two wells were offsi a well MW-6, which is located in the sidewalk on the east side of Center Street, and off 5ite well MW-7, which is located in the asphalt on the northeast corner of Center Street a d Channel Street. The remaining offsite well, MW-5, has apparently been covered by a sidewalk. MW-5 was formerly located in the asphalt on the southeast corner of Center Street arid Channel Street. All four on-site wells were covered with dirt and/or construction debris and could not be located. PHSIEHD directs you, as the responsible parties f this site, to: 1) locate all of the monitoring wells, 2) inspect them to determine if they have be an damaged, 3) repair those wells that are determined to be repairable, 4) properly destroy all wells that have been damaged beyond repair, 5) replace all wells that have been damage I beyond repair, and 6) resume A Division of San Joaquin Count3 Healhh Care Services