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j BANKS & CO All piping shall be removed as practical . Piping that, in the judgement of Banks & Co. cannot be removed must be brought to the attention of the county inspector who will have the final authority to allow piping to be lift in place. All piping left in place must be sealed at the openings. Only the piping associated with tanks will be removed. ' 4.6 DECONTAMINATE TANKS ' The interior of the tanks will be pressure washed per the specifications of NFPA 327. The equivalent of a triple-rinse of water with tri-sodium phosphate (or equivalent) generating a minimum of 55 gallons or 1% of the tank volume, which ever is greater, will be used. The adequacy of cleaning will be based on ' a combustible gas reading of the tank vapors at least one hour after cleaning. A dry cleaning process may be used provided Banks & Co. can verify the method provides cleaning at least equivalent to triple rinsing. In lieu of decontaminating the tanks, the tanks may be manifested as a hazardous waste and transported to a permitted disposal facility. 4.7 DISPOSAL OF TANKS Banks & Co. is responsible for removal and disposal of the tanks and all ' associated piping, if removed from the site. A Certificate of Disposal must be supplied stating the final disposition of the tanks. If a tank is not triple rinsed, of equivalent dry cleaned, then it must be manifested before shipment, ' and the transporter must have current EPA Waste Hauler Certification. 4.8 DISPOSAL OF RESIDUAL LIQUIDS AND CLEANING RINSEATE ' All residual liquids and cleaning rinseate generated or solids from dry cleaning are considered Class 1 hazardous waste. Banks & Co. is responsible for proper disposal of these materials at a proper permitted facility, and the ' transporter must have current EPA Waste Hauler Certification. Proper manifesting of wastes will be required before wastes will be allowed to leave the site. Banks & Co. will submit to the Owner completed waste manifests showing acceptance by the disposal facility. 4.9 ADDITIONAL EXCAVATION, SOIL DISPOSAL, AND REMEDIAL ACTIONS Additional soil may be removed if the soil exhibits evidence of hydrocar- bons. A certified testing laboratory will provide information in the field on soil to be removed. Hydrocarbon impacted soils will either be shipped for disposal at a permitted disposal facility or remedied on-site. The decision for remediation or disposal will be made following removal of the tank and will be based on actual quantity of affected soil , laboratory analyses, type of ' constituents, and requirements of the local enforcing agency. The Owner will be responsible for the soil remediation if that option is selected. Banks & Co. is responsible for excavation services and shall not enlarge an excavation such that it undermines any adjacent structures. If shoring is required t continue the excavation, Banks & Co. shall notify the Owner and stop excavation in that area. 7 SITE SAFETY PLAN