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11/17/90 17:06 TIT RUBBER 4 444 • ' NC.042 POk]4 1 PIPING AND VENTING 11. SUMPSIBOTTOM WARNING:All internal piping must be at least 4"[6"for 12'diame- If the tank has a sump or a bottom fitNlg,take extra care that the far tanks)from the tank bottom, tank does not rest of mll on h prior to installation. CAUTION:All single wall and double wall tanks must be vended to During installation,provide a dear area in the backfill bedding,so atmospheric pressurethat the tank rests on the bad fl bedding and the sump or bottom Refer to Rgure 10-1 and Table 10.1 to determine the correct dimen- fitting is dear.Atter setting the tank fill and tamp the resulting void sions to sin internal pumps and piping. by thrid Wo:continuag the back ting• When the tank's iniumttial space is filled with a liquid,the space Kpillill 14 4 1 . , 1 must be vented.It is sufficient to drill a 114"-diameter hole in the side or cap of the riser pipe as supplied by the installer.When the When the tank has been set,tested and backfifled,and all piping groundwater level will be high enough to enter a drilled vent hole, and venting has been completed,the balance of the backfill material install a vent line from the riser pipe to above grade level. may be added. When the irters rbal space is dry,ft is not necessary to vent the When the tank has been backfilled to subgrade, take the final space to atmosphere. dianeter reading(Deflection readuq"B"an the checklist), It is the installers responsibility to select a thread sealant that is The same material as specified in Section 3 must be used to compatible with the product being stored.Some sealants cannot completely flf excavation.The barky must be free of debris.Airy be used with some products.If necessary remove.dean and blocks or bridles used as support material during piping must be redope all plugs. removed prior to compkdion elf backMirlg.Safety measures,such as placing barricades until installation is complete,should be used ^� etE H 'around the expvationatio • t o c BC rUre flat life Installation meets 8th of tlhe requlft:memS Of erMEMslw LrMF II W IL YlrfMslm LtIE KTAIL 91NiLE YALL t 008EE YLLl minimum Cover as specified in Section 4. 0U49.L yu, i SCLLE, Irl w.,F, rias Be sure that the dledlurt 1s pnopery onmpleletl .e. .E. .M. 13. 1ERECTION DIPSTICK PREPARATION Onve a"i-headed,nett-sp'drtdng(e.g,brass)mail halfway i M a SIMOLE YLLL PIS WTD riui.,. 9p0M airEa YaL 1 dlpshdk 1"above its Close. RRST13MW 1 READING(PRIOR TO BACKHLL) 1 -Ill Er11MG Or IF M C ARE W WTT FW in r� {F A Ir;i6" G.r1T"IYl�°E c�{.[rA _®rra a rrt rAM[ WQ 1. Place the dipstick ntoaservice fdting. 2 - IMEAIPU 0J.K EAS W MVI 1r " 6AIA'E MATF LLFIM . 2. Measure and record the distance from the tank bollen to the FIGURE 141 tap of the fibirg. 3. Rod ft dipstick up until the exposed nail catches on the inside TABLE 10-1 top of the tank. INTERIOR ONER&IONS(IN) 4. Measure the distance from the tank top(inside)to the top WK - of the fitting.Subtract I"from this measurement and record aDl "w "6. C. .d. -E" 'F '6' 'N• •I" the distance. 4' 49.50 54.50 aeon 5150 56.85 x8.00 5. Subtract the second distance from the first and record this value as reading'Yi on the Installation Cheddist B 73.00 78.00 71.76 72.75 7275 70 6251 75.125 1 8625 I rias SECOND GWAIE ER READING(AF FER BACKFILL) t Ir 93.00 9ee0 91.186 92.75 9775 BMW 95.375 100.50 1 91.189 1. Place the dipstick ince a service fitting with a standpipe 10' 121.00 126.0D 119.16 120.75 125.75 118.50 123.50 625 1"9115 installed to subgrade. ( 12' 139,25 14325 136.6251 1 1 1 2. Measure and record the ds tance from the tank bottom to the top of the standpipe. All piping must conform to all applicable codes and standards-See 3. PWA the dipstick up urfl F the nail catches on the inside top of INTRODUCTION. the tank WARNING:When pressure testing the piping,the tank must he 4. Measure the distance from the tank top(inside)to the top of isolated from the piping System.The test pressures for piping ft standpipe.Subtract 1"from this measurement and record may rause the tank to explode and cause death,severe personal the distance, injury or property damage. 5. Suhtabt the secoi distance from the first and record this CAUTION:When extending mondonng or vapor recovery piping to value as reading"B"on the Installation Checklist. the surface,be sure that the at-ordee fittings are different from any fill fittings and will not accept standard fill hoses-