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CAPACITY 25000 g PRECISION UNDERGROUND TANK TESTING RESULTS Patent Pending TANK * D -67-25K-03 PAGE 2 STAT # N/A SHORT REPORT FORM TEST DATE: 4/25/1988 Copyright 1985 NDE TECHNOLOGY, INC. PROPRIETARY COMPUTERIZED PRINTOUT OF DIGITAL LEAKAGE RATE DATA Tank Owner - PACIFIC BELL Tank Number - D -67-25K-03 Measurement 12 Date of Test 04/25/1988 Time of measurement =10:29:17 Tank Temperature 64.9702 degrees F Tank Pressure = .1216 psi Basic Tank Volume = 25000.040 Gallons. Temperature Correction = 57.779 Gallons. Pressure Correction = .014 Gallons. Corrected Volume = 25057.833 Gallons. Volume Change - -.0086 Gallons. Expected Level Change - -.63501 inches Measured Level Change = -.25225 inches Total Fluid Level = 171.692 inches Primary Apparent Leak = -.005 Gallons. Elapsed time = 00:54:46 Primary Apparent Leak Rate = -.006 Gallons/Hour Geometry Band = -.0002 Gallons/Hour Stratified Expected Level Change - -1.234 inches Stratified Apparent Leak = -.013 Gallons. Stratified Apparent Leak Rate = -.015 Gallons/Hour Averaged Measured Level Change = -.16554 inches. Averaged Volume Change - -.0085 Gallons. Averaged Expected Level Change = -.62685 inches. Averaged Apparent Leak. _ .006 Gallons., Averaged Apparent Leak Rate = -.009 Gallons/Hour. Averaged Stratified Volume Change = -.0169 Gallons. Averaged Expected Stratified Level Change = -1.24248 inches. Averaged Stratified Apparent Leak = -.015 Gallons., Averaged Stratified Apparent Leak Rate = -.022 Gallons/Hour. COMPUTERIZED PLOTS OF LEAKAGE RATE DATA NDE TECHNOLOGY, INC. PROPRIETARY WATT INC. 3131 FAIRHAVEN DRIVE, BAKERSFIELD, CA 93308 (805) 322-9827 .1000 .Osec� .0700 i .0600 P .0400 y .0300 M .0200 .0109 0 0 0 0 a J b -.0100 N •. -.0200 :Am -.0300 C3 -.0400 P - TEST TIME - MINUTES NDE TECHNOLOGY, INC. PROPRIETARY WATT INC. 3131 FAIRHAVEN DRIVE, BAKERSFIELD, CA 93308 (805) 322-9827