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• Controlling static electricity or providing a conductive path to discharge static electricity by <br /> bonding and grounding equipment and vehicles. <br /> • Roping off tank area from pedestrian and vehicular traffic. <br /> • Provide two 20-B:C portable fire extinguishers within 50 feet of operations. <br /> • Locating and mark all utility lines on site. <br /> • Determining meteorological conditions. Vapor accumulation can occur on still and high-humidity <br /> days. Under these conditions,test the area for vapor accumulation; if present, either provide <br /> additional forced ventilation or delay the job until there is a breeze and it is less humid. <br /> Excavated soil should be tested for vapor release. <br /> o Artificial ventilation or repeated turning of excavated soil might be necessary to avoid <br /> ignitable concentration of vapors. <br /> • Ensuring personnel are wearing hard hats, safety shoes, and safety glasses and a combustible <br /> gas indicator is available. <br /> Removal and Disposal of Tanks <br /> Removal of above-ground and underground tanks shall be in b = <br /> accordance with all of the following: <br /> • Flammable and combustible liquids shall be removed - <br /> from the tank and connected piping. <br /> • Piping at tank openings that is not to be used further <br /> shall be disconnected. <br /> • Piping shall be removed from the ground. �I _ N <br /> o Exception: Piping is allowed to be <br /> abandoned in place where the fire code d <br /> official determines that removal is not ^x'' <br /> practical.Abandoned piping shall be capped <br /> safeguarded as required by the fire code <br /> official. <br /> • Tank opening shall be capped or plugged, leaving <br /> 1/8-inch to 1/4—inch-diameter opening for pres a <br /> ure "�'r, ,- ' <br /> equalization. <br /> • Tanks shall be purged of vapor and inerted prior to removal. <br /> o Purging or ventilating the tank replaces the flammable vapors in the tank with air, <br /> reducing the flammable mixture of fuel and oxygen below the lower explosive limit or <br /> lower flammable limit (LFL). <br /> • No cutting torch or other flame, or spark, producing equipment should be used until the tank <br /> has been completely purged or otherwise rendered safe. <br /> • All exterior above-grade fill and vent piping shall be permanently removed. <br /> Fire Marshal's Office 425.257.8100 1 everettwa.gov/fire I INFORMATION HANDOUT P-3 8.1.2019 1 Page 2 <br />