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ISCS.PEC\9784S.PEC <br />= OF LODI <br />331 SOUTH HAM JANE <br />-ODI, CALIFORNIA <br />1HL JOB ##9784 <br />6-150.02 FF VAJ,/ABANDONMENT OF EXISTING TANKS AND PIPING SYSTEMS <br />REMOVAL: <br />1. Drain all product lines. <br />Page 1 of 13 <br />4/29/88 <br />- For pressure, submersible turbine pump (STp) system, gravity drain into tank by <br />Opening check valve at STP and the test port in shear valve below dispenser. <br />Disconnect line at SIP union to drain/flush remaining product into an appropriate <br />container. <br />• •• • • :• • ••: i-- a. �• • •- • •. • - .... • • . <br />...• • : <br />6:60 01, <br />a. <br />2. Remove all flammable liquid from tank bottom by using a hand pump to evacuate the <br />remaining few inches. Dispose of tank bottom liquid remains per applicable <br />regulations. <br />3. Excavate down to top of tank and remove fill (drop tube), STP and all piping <br />connections to the tank. <br />4. Temporarily plug all tank openings, complete excavation and remove the tank; placing <br />j it in a secure location. Block the tank to prevent movement. USE EXTREME CAUTION <br />DURING ROVVA.L OPERATION. <br />�. Remove flammable vapors. <br />Preferred method for conditioning tank. <br />Make vapors inert by adding 15 pounds of dry ice (carbon dioxide) per 1000 gallons <br />of tank capacity. <br />The vapors in the tank may be made inert by adding solid carbon dioxide (dry ice) in <br />the amount of 15 pounds per 1000 gallons of tank capacity. The dry ice should be <br />crushed and distributed evenly over the greatest possible area to secure rapid <br />evaporation. Avoid skin contact with dry ice because it may produce burns. As the <br />dry ice vaporizes, flammable vapors will flaw out of the tank and nay surround the <br />area. Hence, observe all normal safety precautions regarding flammable vapors. <br />Make sure that all of the dry ice has vaporized. Contractor is to analyze vapors in <br />tank to insure that the atmosphere in the tank is less than or equal to 10% of the <br />lower explosive limits. <br />6. After the tank has been freed of vapors and prior to moving frcan the site, plug or <br />cap all holes. Use threaded (boiler) plugs to plug any corrosion leak holes. One <br />tank fitting plug should have a 1/8 -inch vent hole to prevent the tank from being <br />subjected to an excessive pressure differential caused by extreme temperature <br />changes. <br />6.12 <br />