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11 <br />a <br />Tanks will be purged of all remaining residues, and these residues will be stored on site in <br />55 gallon DOT approved drums until they are hauled away for disposal by a certified <br />hazardous materials hauler. <br />All tanks will be inerted with a minimum of 30 lbs. of dry ice per 1,000 gallons of tank <br />capacity. More ice will be added if necessary to displace the oxygen in the tanks to a <br />concentration level below the OSHA approved lower explosive limit. When this level is <br />obtained the tank will be removed and samples will be collected per the approved work <br />plan. <br />1.1. Responsibilities of Other Agencies Present: <br />1.1.1. The Environmental Health Department is responsible for approval <br />and inspection of procedures, including excavation, sample <br />procurement and integrity of work plan. <br />1.1.2. The Fire Department is responsible for inspection relative to safe <br />procedures and condition of tank prior to removal. <br />4 <br />