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lk on Ene" Y ASSOCIATES IN PARTNERSHIP WITH THE ENVIRONMENT 25 FEBRUARY, 1991 SAN .JOAQUIN COUNTY ENVIRONMENTAL HEALTH DIVISION 445 NORTH SAN JOAQUIN STREET STOCKTON, CALIFORNIA 95202 ATTENTION: MR. DOUG ',4ILSON AND MRS. KASEY FOLEY IN RE: ARCO MINI MART 4511 PACIFIC AVENUE STOCKTON CALIFORNIA 95207 ON FEBRUARY 19,1991 AN UNAUTHORIZED RELEASE WAS REPORTED AT THIS FACILITY IT WAS REPORTED TO US THAT GASOLINE HAD PUDDLED ON THE NORTH ISLAND AT THIS THREE ISLAND STATION WITH ELEVEN DISPENSERS. THIS WAS RESPONDED TO BY STOCKTON FIRE DEPARTMENT, SAN JOAQUIN COUNTY OFFICE OF EMERGENCY SERVICES AND SAN JOAQUIN COUNTY ENVIRONMENTAL SERVICES. FALCON ENERGY WAS CONTACTED BY THE OWNER, MR, BALWINDER BRAR WHO INDICATED THEY HAD A LINE LEAK AND INDICATED_ IT WAS AUTHORIZED TO BE REPAIRED IMMEDIATELY. ON WEDNESDAY MORNING, 20 FEBRUARY, 1991, OUR CREW WAS ON SITE WITH FIRE BATALLION CHIEF KEN UEHLING WHO HAD A GAS TECH METER AND 'INDICATED THAT AN IMMENT HAZARD 1 EXISTED. THEY UTLIZED THE GAS TECH AND OBTAINED NO READING. HE AUTHORIZED US TO MAKE ANY IMMEDIATE REPAIR TO MITIGATE A FIRE HAZARD, WE OBSERVED' THAT A TRENCH HAD ALREADY BEEN OPENED UNDER THE UNLEADED PRODUCT LINE BETWEEN THE CENTER AND NORTH ISLAND. IT WAS REPORTED TO US THAT THIS HAD BEEN DUNE THE PRIOR DAY WHILE ATTEMPTING TO MITIGATE THE DANGER. HOWEVER, THE LEAK HAD NOT BEEN DISCOVERED, TWO DAYS LATER WE LEARNED THAT WESTERN METER HAD DONE THE EXCAVATING. WE TRACED THE PLUMBING AND ASCERTAINED THAT THE LEAKING LINE APPEARED TO BE APPROXIMATELY FOUR FEET NORTH OF THE EXCAVATED TRENCH. WE PROCEEDED TO UNCOVER THIS AREA DIRECTEDLY UNDER OUR ESTIMATE OF WHERE WE FELT THE LEAK EXISTED AND DISCOVERED A CORRODED COUPLING WITH TWO CORROSION HOLES WHICH WE RETAIN IN OUR POSSESSION. WE MADE REPAIRS TO THIS PORTION OF THE UNLEADED PRODUCT LINE. i WE HAD ALSO NOTICED A SWEATING COUPLING IN THE LINE IN THE EXISTING TRENCH AND OBTAINED PERMISSION FROM THE OWNER TO REPLACE.THAT AS WELL. i . AS WE DISCOVERED THE LEAK, WE INDICATED TO THE OWNER THAT CONTAMINATED SOIL WAS OBSERVED DIRECTLY UNDER THE LEAKING PIPE AND THAT A REMEDIATION PLAN WOULD HAVE TO BE SUBMITTED TO SAN ,JOAQUIN COUNTY ENVIRONMENTAL HEALTH, IN ORDER THAT THE EXTENT OF CONTAMINATION BE ESTIMATED, WE FELT IT WOULD BE EXPEDIENT TO TAKE' i P.O. Box 1257 - Stockton, California 95201 - Number One, Port Road 21, Port of Stockton - Stockton, California 95203 j (209) 463.7108 - FAX (209) 463.2712 f i