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CA <br />AZ# <br />CITY OF STOCKTON <br />STOCKTON FIRE DEPARTMENT <br />STOCKTON, CA 95202.1997 <br />GUIDELINES FOR UNDERGROUND TANK REMOVAL <br />It is the intent of these guidelines to add continuity to the <br />procedures for underground tank removal. Be sure you have <br />completed the necessary paperwork with the San Joaquin County <br />Environmental Health Department prior to applying for City of <br />Stockton permits. Also, please note that a minimum of 48 hours <br />advance notice is required, keeping in mind that the more advance <br />notice given the more likely your inspection will be scheduled on <br />the date of your choice. <br />1. A written safety plan is required that meets Cal-Osha <br />requirements. <br />2. Post signs prohibiting any ignition source: <br />a) Example: "No Smoking", "No Cutting and Welding", etc. <br />3. Provide a minimum rated 20BC or larger fire extinguisher at <br />tank site. <br />4. You must have a calibrated, explosion -proof combustible gas <br />meter on site. <br />a) <br />LEL $D.d Oxygen must both <br />be below 9% prior <br />to removal, <br />or <br />b) <br />Oxygen only, 5% on the oxygen <br />for gasoline <br />and diesel <br />tanks, or <br />c) <br />LEL only, 1% on gasoline <br />and diesel. <br />d) <br />Extra filters and equipment to calibrate instruments <br />must be on site. <br />e) <br />Make and model number of <br />instrument must be <br />available <br />to inspector. <br />f) <br />Appropriate measures are <br />required to assure <br />the LEL <br />percentage is maintained <br />during and after excavation. <br />1) Monitor tanks once per hour for LEL and Oxygen <br />after removal from ground while on site. <br />5. All tanks and connecting lines shall be purged of the product <br />and rinsate material. Rinsate material shall be handled as a <br />hazardous waste: <br />a) Requirement for dry ice use: <br />1) 15 lbs. per 1,000 gallon capacity for diesel tanks. <br />2) 30 lbs. per 1,000 gallon capacity for gasoline tanks. <br />