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LIQUID CONSTRUCTION, INC. <br />October 13, 1986 <br />Arco <br />P.O. Box 5811 <br />San Mateo, California 94402 <br />Attention: Carl Seward <br />Re: Arco#4932 <br />16 E. Harding Way/N. Center, Stockton, Calif. <br />Dear Mr. Seward: <br />On Oct�ber 6, 1986, a Petro Tite System Test was performed at <br />the above -referenced location. The test was performed by <br />Abel Hernandez, LCI Technician. The NFPA Code 329.02 criteria <br />for a tight system is a maximum loss of .05 gallons per hour. <br />Because of the almost infinite variables involved, this is not <br />intended to be a mathematical tolerance and is not the permission <br />of actual leakage. <br />During the stand -pipe test procedure, the internal liquid <br />hydrostatic pressure applied to the underground tank system is <br />generally two to three times greater than normal liquid storage <br />pressures. This increase in hydrostatic pressure will amplify <br />the indicated rate of leak accordingly. <br />SYSTEM TEST <br />Tank No. 1 - West <br />Size - 12,000 Gallons <br />Product - Super Unleaded <br />The test showed a plus .035 gallons per hour. <br />Based on the above criteria, we find the tank tested <br />mathematically tight. <br />Tank No. 2 - Center <br />Size - 12,000 Gallons <br />Product - Regular <br />The test showed a plus .020 gallons per hour. <br />Based on the above criteria, we find the tank tested <br />mathematically tight. <br />1054 North V Street • Post Office Box 1220 0 Tulare, California 93275 0 (209) 688-1980 <br />