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Herrick SEP <br /> EN FIE Mt7�SERVIC STAL TH <br /> September 29, 1987 <br /> Dan Moe, R.S. <br /> ENVIRONMENTAL HEALTH DIVISION <br /> San Joaquin Local Health District ��//�� <br /> P.O. Box 2009 300-3 {~ . XlaWV77 i /1'1 <br /> Stockton, CA 95201 <br /> RE: UNDERGROUND FUEL STORAGE <br /> TANK TIGHTNESS TESTING <br /> Dear Dan, <br /> Attached please find test date and results performed by Integrity Tank Testing <br /> Systmes on our underground fuel storage tanks for 1987. <br /> Please note that initial test, 7/6/87, showed failure of the 10,000 gallon <br /> gasoline and 10,000 gallon diesel tanks. These tanks were uncovered and in- <br /> spected to determine the reason(s) for failure. It was determined that im- <br /> proper venting was creating air pockets which could not be relieved that <br /> accounted for the gains. The tanks were revented and 4 inch risers attached <br /> to center bungs. Tanks were then covered and re-testing performed on 9/21/87. <br /> Re-test results show tanks within tank tightness parameters. <br /> Regards, <br /> GGGtG►'i� <br /> G y Scheuring o,(��' <br /> Purchasing Agent <br /> Stockton Steel, Inc. <br /> GS:dc <br /> ATTACHMENTS <br /> STOCKTON <br /> STEEL <br /> The Herrick Corporation,PO.Box 8429,Stockton,California 95208(209)931-4751 DIVISION OF THE HERRICK CORPORATION <br />