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AB I&ISION MIRONMENTAL TANT, TES -*G <br />OVERCOMING UNDERGROUND WATER PRESSURES FOR HYDROSTATIC TANK TESTING <br />WITH AN INTERNAL ADVANTAGE OF 1.5 PSI I <br />X = UNDERGROUND WATER LEVEL MEASURED FROM TOP OF GRADE TO TOP OF WATER <br />Y = TOTAL NUMBER OF INCHES OF PRODUCT BELOW GRADE (FILLPIPE + TANK DIA) <br />Z = STANDPIPE IN INCHES ABOVE GRADE FILLED WITH PRODUCT <br />I = WATER INTERFACE POINT <br />W.= INSPECTION WELL, WELL POINT ECT ... (VISIBLE WATER LEVEL) <br />R = PRODUCT WEIGHT 031 PSI/IN <br />0 16 <br />N <br />0 (v 10 cp <br />06 04ga p o 0 11 <br />PRODUCT WEIGHTS PSI <br />GASOLINE KEROSINE FUEL OIL DIESEL OIL WATER <br />.026 .029 .031 .031 D .036 <br />wex ry I) (AGR <br />Q) t� - 00 -in Lare <br />cc"d'l ®C <br />_ZC) e2 <br />