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STO ON SERVICE 0 STATION EQUIPMENT CO.9INC. CALIFORNIA CONTRACTOR LICENSE 309105 C-61, SA 808-820 N. UNION ST. STOCKTON, CALIF. 95205 P.O. BOX 508 STOiCKTON, CALIF. 95201 PHONE 209/464-8333 SALES • SERVICE • INSTALLATION OF PETROLEUM DISPENSING • LUBRICATION & INDUSTRIAL SERVICE EQUIPMENT February 2 , 1989 -off�O San Joaquin Beverage Co . P. 0. Box #1138 �2 Stockton, CA. 95201 AT`iN: Bob Girabaldi Gentlemen. This letter is a verification, for the Health Depart- ment, on the tests and repairs made on your 10, 000 gallon underground gas tank. On April 20, 1988, we were called by San Joaquin Bev- erage Co. to precision test a 10, 000 gallon underground gas tank and a 3, 000 gallon diesel tank. The first test on the 10, 000 gallon gas tank was in- conclusive and therefore discontinued. We then uncovered the fill end of the tank to locate the problem. No major contamination was noticed upon excavation. Stockton Ser- vice Station Equipment located a hair-line crack on the top side of the tank next to the 4" fill . Stockton Service Station Equipment repaired the problem and re-tested the 10, 000 gallon tank. The second precision test did not come within the NFPA 329 guidelines . Stockton Service Station Equipment concluded that there was a possible problem with a vapor pocket or with the existing vent line on the other end of the 10, 000 gallon tank - opposite the fill. We then uncovered the vent end of the tank, discon- nected the vent and tested. The vent wouldn' t hold pres- sure and was replaced. Stockton Service Station Equip- ment went ahead and installed a burp line to grade which eliminated the vapor pocket. The tank was back-filled and the third precision test was made. This time, the 10, 000 gallon gas tank was within