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INSTALLATION PROCEDURES FOR UNDERGROUND STORAGE TANKS <br /> GLASTEEL m BED AND BACKFILL : <br /> ALL EXCAVATED NATIVE SOIL MUST Ec REPLACED WITH APPROVED UACKFILL. DO NOT UACKFILL IN LAYERS USI14 <br /> DIFFERENT MATERIALS. <br /> APPROVED OACKFILL MATERIALS A2 <br /> 1. CLEAN WASHED SAND <br /> 2. GRAVEL <br /> A CLEAN, NATURALLY RO%N:EO AGGREGATE WITH A IAIX OF PARTICLE SIZES NOT LESS THAN 1/0" wirl <br /> 14ORE THAN 3/4" IS THIS MATERIAL IS CCtNONLY CALLED PEA GRAVEL, <br /> 3. STONED OR GRAVEL CnUSaIr:S <br /> WASHED STON: OR GRAVEL C:'`JSHINGS WITH ANGULAR PARTICLE SIZE NOT LESS THAN 1/0" 14OR MORE <br /> THAN 1/2" IS REQUIRED. <br /> LEAK TEST PROCEDURES FOR DOUBLE WALL TANK AT JOBSITE WHILE TANK IS E-MPTY : <br /> 1 . 'IF OUTER TkX MAINTAINS AT LEAST 5.3 in.HG OF VACUU4 FOR ONZ HOUR DOTH 11iC INNER TANK AND <br /> OUTER TANG MAY BE WNSI•L.r�ED PROPERTY TESTED. _ <br /> 2•. INNER TAW TO DE PRESS:;:TIZED AT NOT LESS TMN 3 PSI AND NOT HORS TIM 5 PSI MAXIMUd AND <br /> MAINTAINED WHILE CXECX!.'* FOR PRESSURE DROP. <br /> 3. AF fER bWc11C SURE T�IEtE IS NO P."ESSURE DROP (Irb-KS) MAIN'rAIII RZESSURE ON INNER TANK AND <br /> APPLY PRESSURE ON OUTER TANK. DO NOT EXCEED MkC-R TANK PRNISSURE ON OUTER TANK, IF THIS IS <br /> DONE IT COULD COLLAPSE it E INNER TAW. <br /> 4, AFTER OEI?X3 ASSURED CF .'fJ LEAKS, RELEASE F2:SSURE ON OUTER TANK, 1}iEll RELEASE PRESSURE C14 <br /> INNER TANK. ACCURATE LCA; rIESSUZE GAGES MUST DE USED ON DOT11 OUTER AND INNER TAN;C. (15 FIS! g <br /> I'MIMLIA ON DIAL). CARE i%UST DE TAKEN W'riCH FILLIN3 OUTER Tk'x WITIi AIR DUE TO HUCN S1dALLR <br /> VOLUl E OF AIR REQUIRED F0:1 RESSUftE. <br /> TANK HANDLING: <br /> UNOE,Y,'OUND TANKS) AN.SUPPLIED W11)l EITHER ONE OR TWO INSTALLED LIFTING LUGS, OEPENDC14T ON TANK 5:ZC. <br /> REFER TO SPECIFIC TANX ORJ.IIING TO OETEI.iINE T)iE EMPTY LIFTINr, WEIGHT OF THE TANK. <br /> SEE "FINISHING INSTRXTIOHS", ITEM NtAtSER 7; FOR APPLICATION OF LIFTING LUG COVERS TO "CLASTCCL" TANS PR10R <br /> TO DACKFILLINC OR COVERING THE TANK. <br /> 00 NOT DROP OR ROLL Tu%(S) FR04 TRUCK INTO EXCAVATED OPEWi4C. <br /> LIFTING PROCEDURES <br /> O o nnX I ALA <br /> ---d0 n7NIAW <br /> r-_____________...._____—T <br /> THESE INSTALLATION{ IRISTRUCTIONiS TAKE PRECEDEN-E OVER ACT 100 INSTRUCTIONS IN ANY AREA OF <br /> DIFFEREME. <br /> Pardo 2 of 2 <br />