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OHILLSIDE INSTALLATION CAUTION: DO NOT STRIKE THE TANK Tanks may be installed on moderately sloping terrain WITH STEEL BAR provided the slope does not exceed 10 degrees. The After backfill is brought to top of tank,it is recommended ry} downhill side must consist of native soil. Fill dirt is not that water or product be added as ballast until piping / permitted on this side to alter the grade of the slope. and final backfilling to grade is accomplished.When fill- The top of the tank must be below the surface of the ing with ballast or product, make sure the tank is ade- downhill side, and must be covered by material with quately vented. depths as stated in item 4. CAUTION—Do not ballast tank with water or product until backfill is even with top of tank(except as noted in wet hole procedure). The same material as specified in Item 3 must be used —III 100 to completely fill excavation. The backfill must be free of debris.Any blocks or bricks used as support material during piping must be removed prior to completion of backfilling. Safety measures, such as placing barri- cades until installation is complete, should be used III— III II— around the excavation site. III II = NOTE:If there is any reason to believe that water might enter the hole after installation,or if hole is in clay soil with poor drainage,anchoring is required. III II III III III = I 1 - I IIII_ I — O WET HOLE INSTALLATION II— I I II I—I I= Pump the water from the hole to maintain minimum wa- ter level.Add a minimum of 12 inches(30cm)of backfill O DRY HOLE INSTALLATION material to the hole, and level the bed to assure com- plete bottom support for the tank. Position the tank in the hole.The 24 inch(61 cm)spacing between tank and minimum of 12 inches (30cm) of smooth and level pea side wall must be maintained as a minimum in a wet gravel or stone crushings. (See OO) Place the tank or hole installation. tanks on the bed carefully. Do not install Xerxes Century- Cast Tanks directly on a concrete slab,or grout tanks in Partially fill the tank with water until it settles firmly on wet concrete. Also, do not install these tanks on tim- the prepared bed. Ballast level in a tank must never bers, beams, cradles or directly on the hole bottom. exceed water level in hole during installation. Use only enough water to ballast the tank until backfill material is Leveling even with the top of the tank. After the tank is bedded, and prior to backfilling, it must Never fill the second- be leveled. For longitudinal leveling,place the level across clary (external) tank the tank at the top surface. Lateral leveling is accom- with a fluid. plished by placing the level across the top of the tank outlet or manway After leveling tanks, the anchoring proce- BaCkfilling dures in Item 9 must Backfill uniformly with the same material used for bed- be followed. ding. In freezing conditions make sure the material is Backfill must be added - dry and free of ice and snow. First,place a 12 inch(30cm) evenly after anchor- - lift of backfill evenly around the tank. Work the material ing, and remaining dry 12 completely beneath the tank body and endcaps by hand hole backfilling pro- in order to provide full support. A board or tamping bar cedures should be - should be used to followed as stated in force the material in WRONG � �l Item 7. place.After the first h 18-24 inches(46-61 .y u �,� NOTE:Cover depth must meet minimum depth specified in Item 4 0l cm) of backfill is in these Installation Instructions. place, use the ! r' �; t NOTE:It is recommended the tank be ballasted with water or product tamping bar to work - = - _ 11111=111 once backfill is even with the top of the tank. the backfill Into the NOTE:Never allow an empty tank to remain In a wet hole or a dry voids under the hole that may become wet for any period of time without deadmen 1� edges of the tank RIGHT �° and backfill completed. P and around the endcaps. Remain- der of backfill can now be done with- - out further hand work.