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2-05-1996 4=2SVh7 FRLM 'L PLIAL-UMA /b'.5 Of n " <br /> A� •�/ <br /> INSTALLATION PROCEDURES 'FOR UNDERGROUND STORAGE TANKS <br /> GLASTEEL m BED AND BACKFILL: <br /> AL�L€ vJ1TED NATIVE SOtt MUST 8E PEPLACEO WITH APPROVED BACKFILL. OD NOT DACKFILL IN LAYERS USING <br /> DIFFERENT MATERIALS, ' <br /> APPROVED DACXFILL MATERIALS ARE: <br /> 1. CLEAN WASHED SAND <br /> Z. CRAVEL <br /> A CLEAN. NATURALLY ROUNDED AGGREGATE NtTH A MIX OF PARTICLE SIZES NOT LESS THAN 1/0" NOR <br /> MORE THAN 3/4" 15 REQUIRED. T4I3 MATERIAL IS COFMONLY CALLED PEA GRAVEL, <br /> ), STONED OR GRAVEL CRLISHINGS <br /> WASHED STONE OR GRAVEL CRVSHINGS WITNI ANGULAR PARTICLE SIZE NOT LESS WAIN 1/0" NOR w4 n— <br /> THAN 1/2" IS REQUIRED, <br /> _LEAK TEST PROCEDURES FOR DOUBLE WALL TANK AT JOBSITE WHILE TANK IS EMPTY: <br /> 1, IF MnR TANK MAINTAINS AT LEAST 3.3 10.11G OF VACUIl4 FOR ONE HOUR OOTH 7HE INNER TAM AND <br /> CUTIER TAN( MAY BE M41DERED PROPERTY TESTED. <br /> 2•. INNER TAN( TO BE FTRESSURIZED AT NOT LESS THAN S PSI AND NOT MORE THAN 5 PSI 14AXIMV4 AAD <br /> 14AINYAIIIEO WHILE CHECKING FOR PRESSURE PROP. <br /> 3, AFTER MAXIM SURE TI1ERE 1S NO F3iES5URE Vlop (LEAKS) MAINTAIN PRESSURE -OR IHIZER TAIL( AhO <br /> APPLY PRESSURE OIL OUTER TAM. DO IIDT EXCEED INNER TAN{ PRESSURE ON OUTER TANG, IF 'RISS IS <br /> CONE IT CORD COLLAPSE THE INNER TAW. <br /> 4. AFTER DEIIG ASSUMO OF NO LEAKS, RELEASE PLESSURE ON OUTER TAIX. IIIE11 RELEASE PRESSURE ON <br /> INNER TANK, ACCURATE LOW PRESSURE GAPES MUST LIE USED D11 DOTH OUTER AND INNER TANS. (15 PSI <br /> MAXIFN4 ON DIAL). CARE MUST DE TAKEN WHEN FILLING OUTER TAN( WITTI AIR DUE TO MLXX SMALLER <br /> VOLU4E OF AIR REQUIRED FOR FRESSORE. <br /> TANK HANDLING: <br /> VNOERGIAUND TAW(LS) ARE-SUPPLIED WITH EITHER ONE OR TWO INSTALLED LIFYING LUGS, CEPENDENT ON TANK SIZE. <br /> REFER TO SPECIFIC TAM ORANIHO TO OETEN41NE THE EHPTY LIFTINr, WEIGHT OF THE TANK. <br /> SEE `FINISHING INSTRUCT101i", ITEM N(P18ER 7; FOR APPLICATIO14 Of LIFTING LVO COVERS TO "GLASTi_EL" TAWS PAID[? <br /> TO BACKFILLING OR COVERINC; THE YAW. <br /> CO IAT DROP OR BOLL TAN((S) FRU4 TRUCK INTO EXCAVATED OPENING, <br /> LIFTING PROCEDURES: <br /> 125 <br /> Da AM x I n1y1 <br /> ---oa n)N InUn <br /> r------M«_._—y.._-- <br /> THM INSTALLATION INSiTiMriONS TAKE P7E(EOCNCE OVER ACT IGD INSTRUCTIONS IN ANY AMA Of <br /> DIFFEREICB, <br /> PDvo 2 01 Z <br />