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WARNING: <br />Ail internal piping must be at least 4 inch [6 inch for 12 foot <br />diameter tanks] from the tank bottom. <br />t\ CAUTION: <br />All single wall and double wall tanks must be vented to <br />atmospheric pressure. <br />Refer to Figure 10-1 and Table 10-1 to determine the correct <br />dimensions to size internal pumps and piping. <br />When the tank's interstitial space is filled with a liquid, the space <br />must be vented. It is sufficient to drill a 1/4 inch diameter hole in the <br />side or cap of the riser pipe as supplied by the installer. When the <br />groundwater level will be high enough to enter a drilled vent hole, <br />ins -ail a vent line from the riser pipe to above grade level. <br />When the interstitial space is dry, it is not necessary to vent the <br />space to atmosphere. <br />It is the installer's responsibility to select a thread sealant that is <br />compatible with the product being stored. Some sealants cannot <br />be used with some products. If necessary, remove, clean and <br />recope all plugs. <br />8 $ M N <br />OiWJ610N LINE DETAIL oitEtii~IGN LINE DETAIL <br />SINGLE WALL i OQASLE MALL II DOUBLE MALL I <br />.C. <br />A-1,6- <br />3INGLE WALL OOUV,E WALL -II OSE WALL- i <br />RIS OUTER WALL .1 DOTH OUTER WALL <br />NOTE, I - ALL FrTTIN10 OIIENSIONS ARE AEASUIIED FROM THE TOP OF A <br />SERVICE FITTING TO W INSIDE 30TOK OF THE TANK AND <br />INCLUDE SAUSE PLATE <br />1 - INTERIOR O! DO NOT INCLUDE "USE PLATE CLEARANCE. <br />i OMENSMptil <br />N! ' MRA M�A ` O,aA NpsA tlG tll� <br />Y <br />69 it � 1 <br />4- 499'12 <br />541/2 ; 48 <br />51'h 566/a j 48 <br />5 73 <br />j 78 71% <br />"M j 7°& i 7091, <br />801/. 71% <br />3 93 <br />98 913h. <br />91'12 ! 9611. 9091, 90. 100!3 j 914,. <br />10' 121 1 <br />126 ' 1199hs, <br />12091. 1253/4 j 118'12 12311, 11 281h I ,193/,8 <br />12 '38'1. <br />143'A i 1361/vi <br />' <br />MT -TWX M-1 <br />All picing must conform to all applicable codes and standards <br />See NT RCOUCTICN. <br />TIT/riy C'FZL Irk IL <br />When pressure testing the piping, the tank must be isolated <br />from rhe piping system. The testpressura for piping may <br />cause the tank to explode and cause death, severe personal <br />injury or property damage. <br />0 CAUTION: <br />When extending monitoring or vapor recovery piping to the <br />surface, be sure that the at grade fittings are different from any <br />fill liftings and will not accept standard fill hoses. <br />if the tank has a sump or a bottom fitting, take extra care that the <br />tank does not rest or roll on it prior to installation. <br />During installation, provide a dear area in the backfill bedding so <br />that the tank rests on the backfill bedding and the sump or bottom <br />fitting is clear. After setting the tank, fill and tamp the resulting <br />void by hand before continuing the backfilling. <br />When the tank has been set, tested and backfilled, and all piping <br />and venting has been completed, the balance of the backfill <br />material may be added. <br />When the tank has been backfilled to subgrade, take the final <br />diameter reading (Deflection reading MS" on the checklist). <br />The same material, as specified in Section 3, must be used to <br />completely fill excavation. The backfill must be free of debris. Any <br />blocks or bricks used as support material during piping must be <br />removed prior to completion of backfilling. Safety measures, such <br />as placing barricades until installation is complete, should be <br />used around the excavation site. <br />Be sure that the installation meets all of the requirements of <br />minimum lover, as specified in Section 4. <br />Be sure that the checklist is property completed. <br />. _ R <br />Drive a small -headed, non -sparking (e.g. brass) nail halfway into <br />a wooden dipstick 1 inch above its base. <br />FIRST DIAMETER READING (PRIOR TO <br />BACKFILL) <br />1. Place the dipstick into a service fitting. <br />2. Measure and record the distance from the tank botto� to the <br />top of the fitting. <br />3. Pull the dipstick up until the exposed nail catches on the inside <br />top of the tank. <br />4. Measure the distance from the tank top (inside) to the top of <br />the fitting. Subtract 1 inch from this measurement and record <br />the distance. <br />5. Subtract the second distance from the first and record this <br />value as reading 'A" on the Installation Checklist. <br />SECOND DIAMETER READING <br />P!ace the aitistick into a service fitting with a rtandoioe <br />2.Measure ana recora the distance from the tank oottom to the <br />.♦. of the stanarim. <br />3. ?,jil the diosM* up until the nail catcries on the .. of <br />