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VISUAL INSPECTION OF INTERIOR: NO FAILURE AS OF 9/26/08 <br />TANK PARAMETERS ON INSPECTION: IN USE W/USED OIL ENCLOSED NO LEAKAGE <br />TANK DRAWING: SEE PLOT PLAN AND VERTICAL VIEW ATTACHED <br />SECONDARY CONTAINMENT: 8" CONCRETE BLOCK WALL 24" HIGH (SEE MATHCAD CALS ATTACHED) <br />CONTAINMENT IS NOT LINED OR COATED CONTAINMENT GREATER THAN 110% OF LARGEST TANK <br />CONTAINMENT CONDITIONS: VERY GOOD, NO CRACKS OR VOIDS <br />SEISMIC LOAD CALC. 1997 CBC: SEE ATTACHED MATHCAD CALS. ATTACHED <br />EXCEEDS SEISMIC REQUIREMENTS <br />TANK INTEGRITY TEST: VISUAL INSPECTION OF ALL AREAS OF THIS ABOVE GROUND STORAGE <br />TANK - NO LEAKS FOUND OR EVIDENCE OF A PREVIOUS LEAK <br />FIVE PSI PRESSURE TEST DONE ON 9/26/08 <br />PRODUCT IN TANK: 2' OF USED OIL <br />PROCEDURE: TANK VENT WAS REMOVED AND REPLACED WITH PLUG AND 0 TO 15 PSI GAUGE W/ VALVE <br />TANK ACCESS COVER WAS REMOVED AND A NEW GASKET AND BOLTS INSTALLED. TANK FILL LEVEL SYSTEM <br />WAS REMOVED AND PLUGGED. TANK FILL LINE AND PUMP WERE DISCONNECTED AND PLUGGED. AIR WAS <br />APPLIED THOUGH SCHROEDER VALVE. CHECKED FOR AIR LEAKS WITH SOAP SOLUTION. <br />LEAKS: AIR LEAK IN VENT PLUG, GASKET LEAK IN ACCESS COVER, TIGHTEN BOTH, AND RE -CHECK, OK. <br />RETURN TANK TO SERVICE: REINSTALL VENT AND FILL LEVEL MEASURING SYSTEM, INSTALL PUMP PIPING <br />EQUIPMENT: PRESSURE GAUGE 0 TO 15 PSI IN TENTH OF A POUND GRADUATION <br />TIME <br />PRESSURE <br />TEMP. DEG. F <br />12:30 PM <br />0.0 <br />93.6 <br />01:00 PM <br />5.0 <br />94.3 <br />01:25 PM <br />5.0 <br />94.3 <br />02:05 PM <br />5.0 <br />94.8 <br />02:15 PM <br />5.0 <br />94.5 <br />02:30 PM <br />5.0 <br />93.6 <br />02:45 PM <br />5.0 <br />93.2 <br />03:00 PM <br />5.0 <br />92.8 <br />03:15 PM <br />5.0 <br />93.0 <br />NOTES <br />START SLOW PRESSURE BUILD <br />AIR LEAK AT ACCESS COVER <br />03:30 PM 5.0 93.0 NO LEAKS NO TANK FRACTURES <br />TEST COMPLETE <br />PRESSURE ON BOTTOM OF TANK WITH 2' OF PRODUCT AND 5.0 PSI AIR PRESSURE 5.75 PSI <br />TANK FILL PIPING AND VACCUM PUMP rev 1/6/09 <br />TANK PIPING TESTED: OUTLET PIPING TESTED WITH THE TANK AT +5 PSI, SAME AS TANK. <br />PUMP AND FILL PIPING: HAS FREE DISCHARGE TO TOP OF TANK AND NOT UNDER WASTE OIL PRESSURE. <br />PUMP, FILL PIPING, AND HOSE WAS NOT PRESSURE TESTED DUE TO FREE DISCHARGE TO TANK. <br />PUMP, FILL PIPING, AND HOSE WAS DISCONNECTED DURING TANK TEST AS WAS THE FILL LEVEL GAUGE <br />THERE IS NO EVIDENCE OF ANY LEAKAGE, CRACKS, OR EVIDENCE OF WEAK POINTS IN THE SYSTEM. <br />NOTE: VACCUM PUMP AND FILL PIPING, WHEN OPERATING, HOLD LESS THAN 2 GALS OF USED OIL. <br />PAGE 2 <br />