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a , e <br />1) Minimum of 12 t high, and at least one foot above roof le and shall not discharge into any <br />building opening or overhang. <br />2) Minimum of,10 feet from any building opening. <br />3) Do not install under eaves or obstructions. <br />2. Fuel Piping under Dispenser: Schedule 40 black steel pipe with screwed fittings, from shear -off valve <br />to dispenser meter or suction pump, with screwed fitting. <br />3. Underground Tank Pipe Risers: Schedule 40 black steel pipe with screwed fittings. <br />4. Fuel vent piping to be 1-1/2 inch diameter. Minimum FPR pipe. <br />B. Pipe Slope: Slope with piping toward tank (s) 1/8 inch per foot. Install piping without sags or traps. <br />Connect piping to top of fuel tank. <br />C. Threaded Piping Joints: Use an approved pipe joint sealant compound. <br />D. Steel pipe Corrosion Protection: <br />1. General: Spirally wrap steel pipe buried in ground with corrosion protective tape applied with suitable <br />primer after pipe has been thoroughly cleaned and dried and sharp points have been removed. <br />a. Primers: Apply primer in accordance with tape manufacturer's recommendations. <br />- b. Tape: Use two separate layers of 10 mil tape for piping. Apply tapes tightly with 1/2 inch <br />minimum uniform lap, free from wrinkles and voids. <br />2. Field Joints, Fittings and Valves: <br />a. Cover field joints an fittings with 2 full thicknesses of 10 mil thick tape to provide covering 20 mils <br />thick over all surfaces. <br />b. Use max 1 inch wide tape and extend wrapping minimum six inches over adjacent pipe covering. <br />Apply tape with adequate tension so tape will conform and adhere tightly to all surfaces of fittings <br />without air pockets. <br />c. Use putty type insulation compounds or molding tapes as recommended by tape manufacturer, such <br />as: "Chasefil", "Scotchfil", Plycoflex molding tape, or equal, to fill void, flange faces around bolts <br />and other irregular surfaces, to provide smooth, even surface for application of tape wrap. <br />d. Valve: Cover pipe flange and extend over outer edge of valve flange or threaded or portion of <br />valve body. Give two heavy coats of coal tar enamel per AWWA Specification C-102, or Protecto <br />Wrap Co., CA 1180 Mastic Coating Or equal, to unwrapped surfaces of valves. Allow adequate <br />drying time before backfilling. <br />3. Alternative: Factory applied plastic coating on steel pipe, "X -Tru -Coat", 20 mils thick; Scotchkote 202, <br />12 mils thick; or equal. For field joints, fittings and valves, use "X -Tru -Tape" with "X -Tru -Tape" <br />Primer, or equal. <br />E. Corrosion Protection Wrapping Testing: <br />1. Test wrapped or coated pipe, fittings, and field joints on jobsite after assembly with approved high <br />voltage holiday detector, Tinker and Rasor, or equal, with positive signaling device to indicate flaws, <br />holes, or breaks in wrapping. <br />2. Test in presence of Construction Supervisor. <br />3. Test Procedure: <br />a. Prior to starting test, complete all piping and place in bottom center of trench on temporary smooth <br />padded blocks which will hold pipe high enough above bed to allow testing electrode to be run <br />along underside of pipe. <br />b. Remove all shipping protective paper. <br />UNDERGROUND FUEL STORAGE TANK <br />070601:HTL:lc:cw 13215 - 23 CH 107517/ 107518 <br />