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PAGE . 02 <br /> MECHAWCAL CONTRACTORS <br /> 1919 Market Street <br /> P.O.Box 12954 <br /> Oakland,California 94804 <br /> (415)834-2333 <br /> Contractors License No. 184480 <br /> June 6, 1990 <br /> li <br /> W.F. Lewis Construction JUN 09 1990 <br /> 506 Glide Avenue <br /> West Sacramento, California 95691 ENVIRONMENTAL HEALTH <br /> PERMIT/SEPYC7-3 <br /> Reference: Arco #0595, Stockton <br /> Gentlemen: <br /> x <br /> As per our discussion concerning the tanks located at 6100 North Highway 99, <br /> Stockton, California: <br /> These tanks were precision tested on May 31st using the Petro-Tate system. <br /> The test results were Inconclusive due to several factors. There may be a bail <br /> check assembly that Is not accessible. This would allow product to bleed slowly <br /> Into another line. The tanks are very long and even though proper steps were <br /> taken to eliminate air, a pocket may still exist. <br /> The annular space In these tanks is filled with a water type solution. This solution <br /> shows no evidence of any fuel. <br /> It's my opinion that further site investigation is necessary to determine the source <br /> of this problem. I believe the problem is something that Is due to tank expansion, <br /> entrapped air, or a mechanical device, and not a tank failure. <br /> The product lines were also tested and they proved to be tight. <br /> Should you have any further questions concerning this site I can be contacted at <br /> (415) 834-2333. <br /> Very truly yours, <br /> SC T CO. OF ALIFORNIA <br /> Ja ©ro <br /> Environmental Estimator <br /> JG:Jnj <br />