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A8. TANK INSTALLATION PROCEDURE Before You Begin: It is important you review all instructions to make sure that the proper procedures and materials have been complied with. This includes: • Bed and Backfill • Pre -Installation Testing • Hale Size/Burial Depth • Anchoring TANK INSTALLATION - WARNINGS AND CAUTIONS WARNING Do not enter the tank excavation unless necessary! Follow OSHA guidelines for tank excavations. Collapsing excavation walls can cause injury or death! DO ♦ Backfill the tank as soon as possible to tank top to mini- mize chance of tank buoyancy. ♦ Ballast tank with water or product after backfill is even with tank top. DO NOT ♦ Place water or product in tank until backfill is even with tank top! INSTALLATION PROCEDURE - DRY HOLE (WITH OSHA SLOPED EXCAVATION WALLS) Bed DO ♦ Provide a minimum of 12" bedding under entire length of tank using approved backfill material (see Section A2). ♦ Set tanks directly on backfill bed. DO NOT Place tanks directly on concrete pad, timbers, cradles or beams. Backfilling (All tank models) - Proper backfilling is im- portant to provide necessary support for the tank. It is critical to: ♦ Use approved backfill material without voids (see figure 17). FIGURE 17 Right ♦ Place the first 12" lift evenly around tank (see figure 18). ♦ Use a long handled probe to push backfill completely: 0 Beneath tank bottom. ❑ Between the 5 o'clock and 7 o'clock position the entire length of the tank and around the end caps. ❑ Between all ribs, ❑ At 3 to 5 points under end caps. FIGURE 18 Long Handled Probe First 12, Lift of Backfill ♦ Place another 12" of backfill to insure proper support. ♦ Repeat the probing of backfill to insure proper sup- port (see figure 19). FIGURE 19 Long Handled Prone !� Second 12' Litt �! of Elackfill First I' Lift of Backfill L'�'` 7 It Is critical to tank performance that this area offer full support under tank and end caps ♦ After completion of second lift, backfill can be brought to top of tank without additional handwork (compaction may be required for slab support). NOTE: To minimize the chance of tank buoyancy, backfill the tank as soon as possible to tank top and tank ballast (fill tank) with water or product. CAUTION Do not place water or product in tank until backfill is even with tank top or tank damage can occur. CONTINUED ON PAGE 14 13 rf �' ♦ Place the first 12" lift evenly around tank (see figure 18). ♦ Use a long handled probe to push backfill completely: 0 Beneath tank bottom. ❑ Between the 5 o'clock and 7 o'clock position the entire length of the tank and around the end caps. ❑ Between all ribs, ❑ At 3 to 5 points under end caps. FIGURE 18 Long Handled Probe First 12, Lift of Backfill ♦ Place another 12" of backfill to insure proper support. ♦ Repeat the probing of backfill to insure proper sup- port (see figure 19). FIGURE 19 Long Handled Prone !� Second 12' Litt �! of Elackfill First I' Lift of Backfill L'�'` 7 It Is critical to tank performance that this area offer full support under tank and end caps ♦ After completion of second lift, backfill can be brought to top of tank without additional handwork (compaction may be required for slab support). NOTE: To minimize the chance of tank buoyancy, backfill the tank as soon as possible to tank top and tank ballast (fill tank) with water or product. CAUTION Do not place water or product in tank until backfill is even with tank top or tank damage can occur. CONTINUED ON PAGE 14 13