COMPLIANCE INFO_1999-2007 - Laserfiche WebLink

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BACKFILLING 0CAUTION: Use only approved backfill material(See Section 3).Do not mix Never allow an empty tank to remain in a wet hole,or a dry hole approved material with sand or native soil. Do not use native soil that may become wet,unless anchoring and backfilling have as backfill material.All excavated native soil must be replaced been completed.Failure to anchor and backfill may damage with approved material. Place one 12 inch lift of material evenly the tank or surrounding property. around the tank. From the hole side or the top of an adjacent NOTE:Deflection readings to be taken in sequence similar to steps described in tank,work the material by hand completely beneath the tank Section 5. body and domes to provide full support. Use a nonmetal probe Pump the water from the hole to maintain minimum water level. bar long enough to reach beneath the tank and push the backfill Add a minimum of 12 inches of well-placed backfill material to the in place.Repeat this step with a second 12 inch lift.After the hole,and level the bed to assure uniform bottom support for the second lift of material has been placed and probed,the backfill pp tank. Position the tank in the hole. can be brought to the top of the tank without further hand work. UTI Partially ballast tank until it settles firmly on the prepared bed. 0f Ballast level in a tank must never exceed water level in hole Do not strike the tank with the probe bar. The tank may be during installation.Use only enough ballast to sink the tank until damaged and require repair. backfill material is even with the top of the tank. 11�=11111 11=�Ilillll RIGHT IIIII=_ WRONG IIIII- 0WARNING: III-IIIII III-IIIII If product is used as ballast,exercise special care in handling. ' IIIII- IIIII= Safeguard against sparks,fire or product spills.Improper IIII=IIIII IIII-IIIII handling of product can cause a fire or explosion,and death, severe personal injury or property damage. II-IIIII-IIIII-IIIII-IIIII III-IIIII-IIIII-IIIII-IIIII After leveling tanks,the anchoring procedures in Section 7 must FIGURE 5-1 FIGURE 5-2 be followed. When the tank is backfilled to the tank top: Backfill must be added evenly after anchoring,and remaining dry •take an intermediate diameter reading as an in-process hole backfilling procedures should be followed as stated in check. Section 5. • repeat the 5 PSIG(3 PSIG for 12 foot tanks)air test as NOTE:Cover depth must meet minimum depth specified in Section 4 of these outlined in Section 2,soaping all exposed areas of the tank installation instructions. and all fittings. NOTE:It is recommended that the tank be completely ballasted once backfill is even with the top of the tank. SUMMARY 1. Prepare the tank bed. 2.Set and level the tanks. I 3.Measure the tank diameter. _ 4. Install holddown hardware(if applicable). 5.Place and probe the first two lifts of backfill material. 6.Add backfill to the top of the tank. 2 7.Measure the tank diameter and repeat the air test. FIGURE 11 After the air test and measurement of tank deflection are 6-1 successfully completed,it is recommended that the tank be ballasted until piping installation and final backfilling to grade is completed.When filling the tank, make sure that the tank isCA UTI adequately vented.The vent must be large enough to allow the ba Xerxes recommends that eve site be thoroughly evaluated displaced air escape. for the potential to trap water or otherwise subject the tnk to a NOTE:Do not ballast the tank until the backfill is even with the top of the tank. rise in the local water table.Xerxes recommends that all tanks WARNING: be anchored in installations in which water may enter the hole. If product is used as ballast,exercise special care in handling. Failure to anchor may damage the tank or surrounding Safeguard against sparks,fire or product spills.Improper property. handling of product can cause a fire or explosion,and death, DEADMAN ANCHOR severe personal injury or property damage. A deadman is a reinforced concrete beam.The length of the deadman is equal to the length of the tank. A deadman may be ® ® fabricated in multiple sections as long as the total length is not WARNING: decreased and each section contains at least two anchor points. The width and thickness depend on the tank diameter. Refer to Do not use air pressure to test tanks that contain flammable or Table 7-1 for specific dimensions. combustible liquids,or vapors,and do not perform any post NOTE:Tanks of 10 foot diameter and 30,000 gallons or larger may require installation pressure tests.The fuel and air mixture may explode larger deadman to offset buoyancy.Contact Xerxes'Technical Service and cause death,severe personal injury,or property damage. Department for further information.