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11/17/98 17:06 TITROUBBER i 444 • NO.042 P001 For further information concerning fabric specihrabons and instal- SUMMARY Won procedures,consult the filter fabric suppliers installation 1. Prepare the tank bed, guides or instructions. 2. Set and level the tanks. To install filter fabric,typically fitter fabric man6dacturers rewm- 3. Measure the tank diameter. mend that the installer line the excavafion sides and tiohom with 4. Install holddown hardware(if applicable). the fabric.Overlap adjoining panels by at least"Ne inches. S. Place and probe the first two lifts of backfill material Place backfill material on the panels around the edge of the role 6. AMhaddll to the top of the tank. ID anchor them in also:. 7. Measure the tank diamefer and repeat ft air W. fa wets hole cm n the hans,use backfill material to sink and hold the After the air test and measurement of tank deflection are success- fabric in place on the tale bottom. fully completed,it is recommended that the tank be ballasted until piping irrYallatim and final hard"to grade is completed.When 5. DRY rLE INSTALLATION filing the tank make sure that the tank is adequately vented.The CAUTION:Xerxes recommends that every site be thoroughly vent must be targe enough to allow the displaced air to escape. evaluated for the potentia)to trap water or oftrwise subject the WM'°o nam bWW ee ark Hadi the badelt is ewn with me top or tic tank tank to a rise in the local water table.Xerxes recommends that all WARNING:If product is used as ballast,exercise special care in tanks be anchored in installatms in which water may enter the handling.Safeguard against sparks,fire or product spills.Improper hole.Failure to anchor the tank in a wet hole may damage the tank handling of product can Cause a fire or explosion,and death, or surrounding property. severe personal injury or property darnage. Prepare a smooth,level bed,12"thick,of approved backfill eINSTALLATION material.Place the tank or tanks onto the bed.Do not set Xerxes 6. WET tanks directly onto a concrete slab or on timbers,cradles or WARNNG:Do not use air pMMR to hest tanks that rxxnain flam- dimcdy onto the tole bottom. mable or comWstible riquids,or vapors.and do not perform arry Leveling:As the tank is being placed,set the tank prtrih as shown n postinstallation pressure fast The tied and airmodure may explode on the she plans.Xerxes does not require that a tank be pitched. and rause death,sdhwe personal injury,or property damage. All pitch is determined by the tank owners specification.If a double CAUTIOw Clever alloy an empty tank to remain in a we hole,or a wall tank is pftdwd,the monitor should be at the low end.Use the dr hole that tops of the ribs to establish longitudinal level.Establish lateral level may escort it unless anchoring and may damage by placing the level across the top of a fitting,a mammy or a collar. the f been completed.failure rt anchor and backfill may damage the tank or surroading property When the tank is placed,take the first diamheter reading(peflection tore WW=m"ID ce hrren in wqcm similar to saps tla9vlDed in reading'A on the caeddist).See Suction 13 for insotrcfions on semen S. taking deflection readings. Pump the water from the hale to maintain minimum water level. If the tank is to be anchored,install the anchoring hardware at this Add a minimum of 12 adds of well-placed badddl material to the time(See Section 7). hole,and keel the bed to assure uniform bottom support for the BACKRWNG tank Position the lank in the hole. Use only approved backfill material(See Section 3).Do not ma Partaly ballast tank until it settles firmly on the prepared bed. approved material with sand or native soil.Do not use native soil Ballast level in a tank must new exceed water level in hole during as backfill material.All excavated native soil must be replaced with inGtMation.Use only enargh bait to sink the tank until backfill approved material. Place one 12"lift of material evenly around the material is even with the top of the tank. tank.From the hole side or the top of an adjacent tank work the WARf6NG:If product is used as ballast,exercise special care in material by hand completely beneath the tank body and dames to handling.Safeguard against sparks,fire or product spills.Improper provide full support. Use a nonmetal probe bar long enough to handling of product can cause a fire or explosion,and death, roach beneath the tank and push the backfill in place.Repeat this severe personal injury or property carnage• -- step with a second 12"lift.After ft second lift of material has been After ,the ardarimq Procetlure5 in Section 7 must placed and probed,the backfill can be brought to the top of the be lalkraved. tank without further hand work CAUTION:De not strike the tank with the probe bar.The tank may Batlfill must be added evenly after anchoring,and remaining be damaged and require repairdry hole backfilling procedures should be followed as stated in I Jill R I GHT VIII_ WRONG IIII ww worn ren est"'e'""'°e)»"spec"ed"Sec°°"'°'e es` II !N I I Note It Is rKwrv;wo*1 Mat de tar be cmVd*Mlasted once baddlw is even II with ave by of rhe rank. II_ FIGURE 5-1 FTGURE5-2 — — When the tank is backfilled to the tank top: •tabs an rrdermediate diameter reading as an in-process check. F •repeat the 5 PSIG(3 PSIG for 12-foot tanks)air test as outlined in Section 2,soaping all exposed areas of the tank and all fittings. FIGURE 6.1