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� <br /> � <br /> ^ <br /> �ILE # : 870723GP . ID <br /> TANK #836-11D <br /> 1000 GAL. ESEL <br /> CONCLUSION BASED ON TEST RESULTS . <br /> IT APPEARS THAT THIS TANK HAS A CHECK VALVE , EITHER lN THE <br /> LINE OR IN THE TANK . NO VISIBLE CHECK VALVE FOUND. DURING THE <br /> TEST , THE SUCTION LINE AND :RETURN ETU� LINE WERE DISCONNE�7ED . THAT <br /> RESULTED IN THE IN LEAK INCREASING , A TRI CKLE BACK T|�ROU8H �HE <br /> PUMP (MOST LIKELY) PRODUCED A LEAK RATE OR —0 . 09GPH (AN IN LEAK) , <br /> WHEN THE LINES WERE LDISCONNECTED, THE LEAK RATE WENT TO —0 . 130PH , <br /> THI S �ROBABLY DUE TO THE OPEN PIPE ALLOWING MORE AIR INTO �-HE <br /> �I PE 7"HAM COULD LEAK TH UMP . <br /> RECDMMENDATI �N : <br /> THE CHECK VALVE MUST BE LOCATED AND ACCESS TO THE VALVE MUST <br /> BE PROVIDED . REMOVAL OF THE CHECK VALVE PRIOR TO TESTING IS <br /> NECESSARY . WITH THE LEAK BACK SITUATION, THE ACTUAL STATUS OF <br /> THE TANK IS UNKNOWN. <br /> ' <br /> Adak <br /> GARY PETERS <br /> ' <br />