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PUBLICEALTH¢:'3ERr�CEs� SAN JOAQUIN ENVIRONMENTAL HEALTH 01VISION Ernest M. Fujimoto, M. D., M.P.H., 304 East Weber Avenue, Third Floor 2091468-3420 ;i PAUL SUPPLE ARCO -PRODUCTS COMPANY PO BOX 6549 MORAGA CA 94570 RE. ARCO Station #4493 205 North Center Stockton CA 95202 il San Joaquin County, Public Health Services Environs reviewed historic information pertaining to the above I neighboring former Shell Oil facility. PHS/EHD has I ;s consideration and response. �l Tank Testing History PHSIEHD's records indicate that three 12,000 gallon storage tanks were installed December 1984. The fir record of occurred on October 6, 1986 and the result maximum loss for a tight tank. The tanks were retest results indicated that the tanks were tight; however, t tanks were next tested on December 16, 1987 and al �i testing. A vapor line was repaired and tank #2 was n results indicated that tank #2 was tight. Again on De and passed. On January 5, 1989 , all three tanks ai May 30, 1989, the leak detectors were tested and pa tested and passed. On October 18, 1991, the piping 1992 , the line and leak detectors were tested and pa of the tanks was initiated. On March 19, 1993, two le following replacement and retesting, the leak detector of the tank #2 line failed. The retest following the rel j testing records were available in PHSIEHO's file. In leaking from tank #3. The tank was reportedly pump capped . A temporary closure plan was submitted to expires on January 15, 1998 at which time the tank s, requirements. Unauthorized Release Reporting UAR History On June 3, 1991, an UAR was filed in response to a c repaired. On February 1, 1992, a Proposition 65 Noti off. On February 20, 1992, an UAR was filed in respc On November 1, 1993, an UAR was filed in response traveled into the sewer. Fish and Game was notified. Notification was filed in response to the November 1, of gasoline product was discharged. The Fire Depart Health Officer CA 95202 UUL 2 u K=4I SITE CODE: 231042 ental Health Division (PHSIEHD) has -ferenced ARCO facility and to the epared the following comments for your ival wailed fiberglass underground t precision tests which PHSIEHD has indicated that the tanks exceeded the �d on January 15, 1987. The retest e retest was not a full system test_ The but tank #2 (center) passed the integrity rested on December 23, 1987. The retest amber 30, 1987, the tank was retested d piping passed precision testing. On sed. On August 17, 1990, the lines were ras tested and passed. On March 24, sed. During 1992 continuous monitoring k detectors failed testing; however, passed. On November 4, 1993 the test acement of an O-ring passed. No further 996, the annular fluid was reported 1 and piping evacuated and plugged or 'HSIEHD January 1997 and which stem must be upgraded to 1998 ive off. ' The dispenser was reportedly cation was filed in response to a drive ise to a drive off on February 19, 1992, o a drive off. The gasoline reportedly On November 2, 1993, a Proposition 65 993 drive off. Approximately 100 gallons lent responded to contain the discharge. A Division of San foaqum County "ealth Care Services