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INSTALLATION PROCEDURE - DRY HOLE (STRAIGHT OR SHORED WALLS) ♦ Set tank on minimum 12" approved backfill bed ♦ Straight or shored walled holes in tight areas require a curved probe to properly backfill under and around the tanks. ♦ The curved probe is a 4' section of the long -handled aluminum probe bent on a radius to match the tank curvature. ♦ Probe (with curved probe) the entire tank bottom and around end caps between the 5 and 7 o'clock position. ♦ Place first 12" lift evenly around tank. ♦ Probe (with curved probe) the entire tank bottom and around end caps at the 5 - 7 o'clock position. Push backfill evenly against tank walls and under end cap (see figure 20). FIGURE 20 Long Handled Probe ♦ Place the second 12" lift evenly around tank. • Probe (with straight probe) the entire tank bottom and around endcaps at the 3 - 5 o'clock position (see figure 21). FIGURE 21 Long Handled Probe Second 12" Lift of Backfill First 12" Lift of 1 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 hand- work. 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. 14 CAUTION Do not place water or product in tank until backfill is even with tank top or tank damage can occur, INSTALLATION PROCEDURE - WET HOLE Before you begin: ♦ Determine if a filter fabric is necessary for your installa- tion (see section A6 for details). In general: ♦ Water level should be maintained at lowest practical level by using pumps (with or without a well -point system). Bed ♦ Provide a minimum bed of 18" of approved backfill. Ballast FIGURE 22 ♦ If water cannot be lowered, you will need to ballast (fill tank) tanks to sink them, ♦ Place tanks in the hole, maintaining control with lifting cables attached to all lift lugs provided on tank. i Add enough ballast` to sink the tank (see figure 22). ❑ Water level inside tank should not be more than 1' above water level outside tank. ♦ While adding ballast, use lifting cable to keep tank in posi- tion. ♦ Tanks should be free to roll slightly. Backfilling ♦ Place first 12" lift evenly around tank ♦ Push backfill under tank using ❑ Long handled probe and/or, ❑ An air jet.* ♦ Place second 12" lift evenly around tank. ♦ Push backfill under tank. ♦ After completing the second lift, backfill can be brought to tank top without using the probe or air jet. * An air jet can be constructed by using a 3/4" steel pipe connected to a 65 cfm compressor. We recommend you install a valve on the air jet, which allows the operator to safely control the flow. Additional information on alternate man -out -of -hole instal- lation techniques is available. Call Containment Solutions and ask for Pub. No. INST 6004, Alternate Backfill Proce- dure. :'4'Curvedil Probe ctionBED—__ Concrte .:`�_ +� ♦ Place the second 12" lift evenly around tank. • Probe (with straight probe) the entire tank bottom and around endcaps at the 3 - 5 o'clock position (see figure 21). FIGURE 21 Long Handled Probe Second 12" Lift of Backfill First 12" Lift of 1 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 hand- work. 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. 14 CAUTION Do not place water or product in tank until backfill is even with tank top or tank damage can occur, INSTALLATION PROCEDURE - WET HOLE Before you begin: ♦ Determine if a filter fabric is necessary for your installa- tion (see section A6 for details). In general: ♦ Water level should be maintained at lowest practical level by using pumps (with or without a well -point system). Bed ♦ Provide a minimum bed of 18" of approved backfill. Ballast FIGURE 22 ♦ If water cannot be lowered, you will need to ballast (fill tank) tanks to sink them, ♦ Place tanks in the hole, maintaining control with lifting cables attached to all lift lugs provided on tank. i Add enough ballast` to sink the tank (see figure 22). ❑ Water level inside tank should not be more than 1' above water level outside tank. ♦ While adding ballast, use lifting cable to keep tank in posi- tion. ♦ Tanks should be free to roll slightly. Backfilling ♦ Place first 12" lift evenly around tank ♦ Push backfill under tank using ❑ Long handled probe and/or, ❑ An air jet.* ♦ Place second 12" lift evenly around tank. ♦ Push backfill under tank. ♦ After completing the second lift, backfill can be brought to tank top without using the probe or air jet. * An air jet can be constructed by using a 3/4" steel pipe connected to a 65 cfm compressor. We recommend you install a valve on the air jet, which allows the operator to safely control the flow. Additional information on alternate man -out -of -hole instal- lation techniques is available. Call Containment Solutions and ask for Pub. No. INST 6004, Alternate Backfill Proce- dure.