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VISION ENVIRONMENTAL TANK TFSi,,G /o J-,2, , / <br /> OVERCOMING UNDERGROUND WATER PRESSURES FOR HYDROSTATIC TANK TESTING <br /> WITH AN INTERNAL ADVANTAGE OF 1.5 PSI <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 !o; r PSI/IN <br /> Z <br /> 0 0 0 <br /> b o b o 6 6 p � 4e i .`G•p • o •° p • ° J v <br /> i <br /> a <br /> Char ron l l <br /> w QS K Nardi <br /> (zocl) GCIL,_c� <br /> PRODUCT WEIGHTS PSI <br /> GASOLINE KEROSINE FUEL OIL DIESEL L )WATER <br /> .026 .029 .031 C 031 .036 <br />