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MLSCS.PEC\9784S.PEC CITY OF LODI Page 1 of 13 1331 SOUTH HAM LANE LODI, CALIFORNIA 4/29/88 RHL JOB #9784 6-150.02 REMOVAii/ABANDONMENT OF EXISTING TANKS AND PIPING SYSTEMS PD IOVAL: 1. Drain all product lines. - For pressure, submersible turbine pump (STP) system, gravity drain into tank by opening check valve at STP and the test port in shear valve below dispenser. Disconnect line at STP union to drain/flush remaining product into an appropriate container. CAUTION: DO NOT INTRODUCE COMPRESSED AIR INTO LINES FOR PURPOSE OF EVACUATING PRODUCT FROM CITIES. 2. Remove all flammable liquid from tank bottoms by using a hand pump to evacuate the remaining few inches. Dispose of tank bottom liquid remains per applicable regulations. 3. Excavate down to top of tank and remove fill (drop tube) , STP and all piping connections to the tank. 4. Temporarily plug all tank openings, complete excavation and remove the tank; placing it in a secure location. Block the tank to prevent movement. USE EXTREME CAUTION DURING REMOVAL OPERATION. 5. Remove flammable vapors. Preferred method for conditioning tank. Make vapors inert by adding 15 pounds of dry ice (carbon dioxide) per 1000 gallons of tank capacity. The vapors in the tank may be made inert by adding solid carbon dioxide (dry ice) in the amount of 15 pounds per 1000 gallons of tank capacity. The dry ice should be crushed and distributed evenly over the greatest possible area to secure rapid evaporation. Avoid skin contact with dry ice because it may produce burns. As the dry ice vaporizes, flammable vapors will flaw out of the tank and may surround the area. Hence, observe all normal safety precautions regarding flammable vapors. Make sure that all of the dry ice has vaporized. Contractor is to analyze vapors in tank to insure that the atmosphere in the tank is less than or equal to 10% of the lower explosive limits. 6. After the tank has been freed of vapors and prior to moving from the site, plug or cap all holes. Use threaded (boiler) plugs to plug any corrosion leak holes. One tank fitting plug should have a 1/8-inch vent hole to prevent the tank from being subjected to an excessive pressure differential caused by extreme temperature changes.