REMOVAL 1988 - Laserfiche WebLink

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'ABANDONMENT: Page 3 of 13 1. Drain all piping back into the tank. 2. Remove all flammable liquid which can be pumped out. It may be necessary to use a hand pump to remove the bottom few inches of product. 3. Remove the fill (drop) tube. Disconnect the fill, gauge, and product lines. Cap or plug open ends of lines which are not to be used further. The vent line should remain connected until the tank is filled as outlined below. 4. Remove flammable vapors accordingly to paragraph #5 in the Removal Section of this spec. 5. Proceed to introduce a suitable inert material through the fill and pump ends as required to maintain a constant level. Concrete vibrators shall be used at both ends to provide proper compaction. a. Sand and cement slurry mix shall be used to fill the calculated capacity of the tank until the tank is full and overflows the fill openings. b. The Contractor shall provide proof of delivery of the sand slurry to the City of Lodi. 6. Disconnect and cap the vent line. 7. When underground tanks are abandoned in place, the owner of the tank should keep a permanent record of the tank location, the date of abandonment, and the method of conditioning the tank for abandonment. 6-150.03 EXCAVATION AND BA=LL OF UNDERGROUND TANKS A. EXCAVATIONS: Excavate only to the depths required by the plans, or as instructed by Owner Representative. If unexpected water condition or rock is encountered, immediately contact the Owner's Representative for instruction before proceeding with the excavation. VERIFY THAT EXCAVATION IS IN ACCORDANCE WITH TANK MANUFACIURER'S SPECIFICATIONS. 1. TANK HOLE SIZE: Size excavation perimeter to allow 24" minimum. between tanks and 12" minimum between tank sides and end caps and the wall of the tank hole. 2. Filter fabric will be used to line tank hole and cover granular backfill. 3. DEPTH OF TANK HOLE: Contractor is repsonsible for establishing the tank hole depth, considering the length of piping runs, to the pump blocks and vent risers, pipe burial depth, yard slope and the following criteria: (Measure at the Remote Pump opening) . a. A minimum of 12" backfill material is required under the tanks, except as note on the plans. b. The minimum depth of cover for steel tanks is 4'-0" and the maximum is 7'-0" 0" (not to be exceeded) . c. Product lines shall be sloped 1/4" per ft. down to the tanks. Minimum. slope is 1/8" per ft.