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MISC\TANKS .PEC <br /> Page 8 of 22 <br /> 2 . WET HOLE CONDITION: Attempt to pump water from the tank <br /> hole to maintain a "Dry Hole Condition" . If unable to <br /> obtain a "Dry Hole Condition" , Company Rep. is to be <br /> notified and will determine the course of action to be <br /> followed. Install filter fabric, tie-down "logs" and <br /> bedding as specified elsewhere. Set tank in hole, <br /> partially fill with water until it sinks firmly on the bed. <br /> Use only enough water to ballast tank until backfill is to <br /> top of tank. After backfill to top of tank, fill tank with <br /> water until completion of installation. Caution - Ballast <br /> level must never exceed water or backfill level in the hole <br /> during installation. Do not remove ballast until tank slab <br /> has been poured. (DO NOT SET SUBMERSIBLE PUMP MOTOR UNTIL <br /> BALLAST WATER HAS BEEN REMOVED FROM TANK) . <br /> 1. 8 TANK HOLD-DOWNS (Tie Downs) <br /> A. Install hold-down "logs" at all locations with known water <br /> conditions and at those locations where water is found during <br /> tank installations. Refer to "Tank Hold-Down" fabrication and <br /> installation requirements of these specifications. <br /> 2 . 1 UNDERGROUND TANKS <br /> A. MATERIALS : STI-P3 Steel storage tanks as supplied by the Owner <br /> are to be installed by Contractor in accordance with the plans <br /> and specifications and manufacturer' s recommendations. <br /> 2 . 2 HANDLING OF TANKS <br /> A. LIFTING & MOVING: When lifting or moving an FRP tank, always use <br /> properly sized equipment and lift by lifting lug(s) . On large <br /> tanks, greater than 8 ' diameter, use a spreader bar to ensure a <br /> lift angle of at least 45 degrees at each lifting lug. <br /> B. 1. Never roll or use cables or chains around an FRP tank. Set <br /> on smooth ground, free of rocks and foreign objects. <br /> Exception: Tank can be rolled up to 90 degrees on a smooth <br /> clean surface when performing the "pre-installation" <br /> pressure test. <br /> C. CHOCKING: Tanks are to be chocked in accordance with <br /> manufacturer' s recommendation until ready for installation. If <br /> windy conditions exist or are expected, anchor tanks using <br /> minimum 1/2" nylon .or hemp rope over each tank and secure to <br /> stakes of adequate size to prevent movement of the tanks. <br /> D. OPENINGS: All tanks are shipped with dust covers in each <br /> opening. Dust covers are to remain in each opening until ready <br /> for the pre-installation pressure test. Replace dust covers <br /> after this test has been completed. <br />