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60 HILLSIDE INSTALLATION CAUTION: DO NOT ,IFRIKE THE TANK Tanks may be installed on moderately sloping terrain WITH STEEL BAR ended provided the slope does not exceed 10 gl dirt isTnot he hatrwaterflorsprodugcttbetop added as ballastof tank,it isountil piping downhill side must consist of native sol Fil permitted on this side to alter the grade ow the suorface of the ng wf the slope. and ith product, make sureaccomplish tank ade- The top of the tank ming to grade is ust be downhill side, and must be covered by material with CAUTIONquately -Do Do not ballast tank with water or product depths as stated in item 4. 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 to completely fill excavation. The backfill must be free of debris.Any blocks or bricks used as support material I - during piping must be removed prior to completion of backfilling. Safety measures, such as placing barri- III cades until installation is complete, should be used I II Ill- around the excavation site. III=1111 ,III- -_ 1111 II _ NOTE:If there is any reason to believe that water might enter the hole I II IIII II = _ after installation,or if hole is in clay soil with poor drainage,anchoring I is required. I I=1111 l III 12 O WET HOLE INSTALLATION III (II III = 1 = 1 1111_ 1 = I Pump the water from the hole to maintain minimum wa- I ter level.Add a minimum of 12 inches(30cm)of backfill 7 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 bed must be smooth and level, and must contain a 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 (1) Place the tank or hole installation. tanks on the bed carefully. Do not install Xerxes Century- Partially fill the tank with water until it settles firmly on : Cast Tanks directly on a concrete slab, or grout tanks in the prepared bed. Ballast level in a tank must never wet concrete. Also, do not install these tanks on tim- exceed water level in hole during installation. Use only bers, beams, cradles or directly on the hole bottom. 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 After leveling tanks, outlet or manway the anchoring proce- dures in Item 9 must Backfilling - be followed. _ Backfill uniformly with the same material used for bed 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 Item 7. place. After the first °go 18-24 inches(46-61 �. NOTE:Cover depth must meet minimum depth specified in Item 4 of i these installation instructions. cm) of backfill isn place, use the ° NOTE:It is recommended the tank be ballasted with water or product tamping bar to work = _ _ _ _ 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 edges of the tank RIGHT ° and backfill completed. and around the endcaps. Remain- der of backfill can now be done with- out further hand work.