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GLASTEELL- BED AND BACKFILL: <br />ALL EXCAVATED NATIVE SOIL MUST BE REPLACED WITH APPROVED BACKFILL. DO <br />NOT BACKFILL IN LAYERS USING DIFFERENT MATERIALS. <br />APPROVED BACKFILL MATERIALS ARE: <br />I. CLEAN WASHED SAND <br />2. GRAVEL <br />A CLEAN. NATURALLY ROUNDED AGGREGATE <br />LESS THAN 1/8" NOR MORE THAN 3/4' IS <br />COMMONLY CALLED PEA GRAVEL. <br />3. STONE OR GRAVEL CRUSHINGS <br />WITH A MIX OF PARTICLE SIZES NOT <br />REQUIRED. THIS MATERIAL IS <br />WASHED STONE OR GRAVEL CRUSHINGS WITH ANGULAR PARTICLE SIZE NOT LESS <br />THAN 1/8' NOR MORE THAN 1/2' IS REOUIRED. <br />LEAK TEST PROCEDURES FOR DOUBLE WALL TANK AT JOBSITE WHILE TANK <br />TANK IS EMPTY: <br />1. IF OUTER TANK MAINTAINS AT LEAST 5.3 IN. HG. OF VACUUM FOR ONE HOUR <br />BOTH THE INNER TANK AND OUTER TANK MAY BE CONSIDERED PROPERLY <br />TESTED. <br />2. INNER TANK TO BE PRESSURIZED AT NOT LESS THAN 3 PSI AND NOT MORE <br />THAN 5 PSI MAXIMUM AND MAINTAINED WHILE CHECKING FOR PRESSURE DROP. <br />3. AFTER MAKING SURE THERE IS NO PRESSURE DROP (LEAKS) MAINTAIN <br />PRESSURE ON INNER TANK AND APPLY PRESSURE ON OUTER TANK. DO NOT <br />EXCEED INNER TANK PRESSURE ON OUTER TANK. IF THIS IS DONE IT COULD <br />COLLAPSE THE INNER TANK. <br />4. AFTER BEING ASSURED OF NO LEAKS. RELEASE PRESSURE ON OUTER TANK. <br />THEN RELEASE PRESSURE ON INNER TANK. ACCURATE LOW PRESSURE GAGES MUST <br />BE USED ON BOTH OUTER AND INNER TANK. (I5 PSI MAXIMUM ON DIAL.) CARE <br />MUST BE TAKEN WHEN FILLING OUTER TANK WITH AIR DUE TO MUCH SMALLER <br />VOLUME OF AIR REQUIRED FOR PRESSURE. <br />TANK HANDLING: <br />UNDERGROUND TANK($) ARE SUPPLIED WITH EITHER ONE OR TWO INSTALLED LIFTING <br />LUGS. DEPENDENT ON TANK SIZE. REFER TO SPECIFIC TANK DRAWING TO DETERMINE <br />THE EMPTY LIFTING WEIGHT OF THE TANK. SEE 'FINISHING INSTRUCTIONS.' ITEM <br />NUMBER 7: FOR APPLICATION OF LIFTING LUG COVERS TO "GLASTEEL' TANKS PRIOR TO <br />BACKFILLING OR COVERING THE TANK. <br />DO NOT DROP OR ROLL TANK(S) FROM TRUCK INTO EXCAVATED OPENING. <br />LIFTING PROCEDURES: <br />0°MAXIMUM <br />60°MINIMUM <br />r ----------------------------------------- <br />I 1 <br />1 I <br />1 1 <br />1 I <br />I <br />THESE INSTALLATION INSTRUCTIONS TAKE PRECEDENCE OVER ACT 100 INSTRUCTIONS <br />IN ANY AREA OF DIFFERENCE. <br />PAGE 2 OF 2 <br />