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0 ! <br />NSTAUUATION PROCEOURES FOR UNDERGROUND STORAGE TAW <br />OLASTEEL" BED AND BACKFILL <br />ALL EXCAVATED NATIVE SOIL MUST BE REPLACED WITH APPROVED BACKPILL, 00 <br />NOT BACKFILL IN LAYERS USING DIFFGRENT MATERIALS, <br />APPROVED BACKFILL MAYGRIALS ARE: <br />1. CLEAN WASHED SAND <br />2. GRAVEL <br />A CLEAN. NATURALLY ROUNDED AGGREGATE WITH A MIK OF PARTICLE SIZES N01 <br />LESS THAN 1/4' NOR MORE THAN 3/4• IS REQUIRED, THIS MATERIAL IS <br />COMMONLY CALLED PEA GRAVEL. <br />3. STONE OR GRAVEL CRUSHINOS <br />WASHED STONE OR GRAVEL CRUSAINGS WITH ANGULAR PARTICLE SIZE NOT LESS <br />THAN I/S- NOR MORE THAN 1/2' IS REQUIRED. <br />1. IF OUTER TANK MAINTAINS AT LEAST 5,3 IN. NO. OF VACUUM FOR ONE HOUR <br />BOTM THE INNER TANK AND OUTER TANK MAY SE CONSIDERED PROPERLY <br />TESTED. <br />2. INTERSITIAL SPACE TO BE VACUUM TESTED ONLY, <br />NOTE: MODERN WELDING COMPANY DOES NOT RECOMMEND HOLIDAY TESTING FOR <br />OLASTEEL It TANKS. - <br />TANK HANDLINb: <br />UNDERGROUND TANK(S) 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 71 FOR APPLICATION OF LIFTING LUG COVERS TO 'GLAQTEEL' TANKS PRIOR TC <br />SACKPILLING OR COVERING THE TANK. <br />DO NOT DROPIOR ROLL TANKS) FROM TRUCK INTO EXCAVATED OPENING, <br />Y <br />LIFTING PROCEDURES: <br />SECONDARY TANK <br />0°nwXIP%UA <br />oil* AINImum <br />Y- <br />r ---------------------------------------- <br />1 <br />I-F-RIAARY TANK I <br />I I <br />i 1 <br />I 1 <br />THESE INSTALLATION INSTRUCTIONS TAKE PRUCS05NC■ OVER ACT 100 INSTRUCTIONS <br />IN ANY AREA OF DIPPEIIENCE, <br />PAGE 2 OF 2 <br />