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& A 5630 District Btvd. 0103 <br /> "E TANK G DIV. Bfi� <br /> w� <br /> i <br /> , <br /> October 13, 198" <br /> AT&T Communications <br /> F.O. Box 4868 <br /> Mode=-to, CA 95352 <br /> ATTN: R.W. Russell <br /> RE: Farmington <br /> On September 29, 1487, a Horner Ezy-Chek System Test was <br /> performed at the above-referenced location. The test was <br /> performed by Tom Bradshaw, A 8 A Technician. The NFPA cede <br /> 329.02 criteria for a tight system is a maximum gain or loss of <br /> .05 gallons per hour . Because of the almost infinite variables <br /> involved, this is intended to be a mathematical tolerance and is <br /> not the permission of act:_ial leakage. <br /> During the stand-pipe procedure, the internal liquid hydrostatic <br /> pressure applied to the underground tank system is generally two <br /> to three times greater than normal liquid storage pressures. <br /> This increase in hydrostatic pressure will amplify the indicated <br /> rate of leak accordingly. <br /> SYSTEM TEST <br /> TANk: NO. 1 - <br /> SIZE - 3000 Gallon Steel Tank: <br /> PRODUCT - Diesel <br /> The test showed a leakage of - 03 Sallens per hour . <br /> Based on the above criteria , we find the system mathematically <br /> Tight . <br />