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Fuel Storage Tank Product Conversion Guidelines The following guidelines should be used when planning any fuel product conversions for UST's or AST's . Questions about these guidelines should be addressed to your Region Environmental Coordinator or the Corporate Environmental Affairs Program Manager . When considering product conversions , the age and construction of the tank must be determined to ensure fuel compatibility . Pre - Conversion Planning 1 . Normal REFCO procedures must be followed . 2 . Contact UPS Fuel Services at 5 - 334 - 3133 at a minimum of twenty days prior to tank conversion to ensure the correct fuel contracts are in place and the necessary inventory adjustments are made . 3 . Prior to any work commencing , check with your local tank regulatory authority ( COPA in CA sites ) for any necessary permitting requirements . All necessary permits must be obtained prior to commencement of work . Tank Conversion Scope of Work Physical Changes 1 . The product lines should have the gasoline or diesel blown back with air into the tank . 2 . Empty the tank of all gasoline or diesel and remove all water and sludge from the tank for disposal , All wastes must be disposed according to local , state , and federal regulations . If wastes are considered hazardous ensure uniform hazardous waste manifests are completed and retained in the facility 's hazardous waste file . 3 . Equipment change - out . Reference UPSPEC for acceptable material manufacturers , make and model numbers . a . For Gasoline to Diesel Conversions , 1 ) The Veeder Root gauging probe water float must be changed from a gasoline float to a diesel float . 2 ) The submersible leak detector must be change to a diesel leak detector . 3 ) If the existing gasoline tank has a coaxial fill , then the tank fill and drop tube will need to be changed . 4 ) Change the tank vent cap from pressure vacuum to open type . 5 ) Install diesel filter assembly ( most likely exterior mounted ) and remove/cap the existing gasoline filters . 6 ) The dispenser strainers in the meters should be changed from gasoline strainers to diesel strainers . 7 ) Change out the hoses , breakaways and nozzles on the dispenser . If applicable , remove any stage II vapor recovery equipment/ accessories . 8 ) If possible , adjust meter heads to obtain 20 gpm flow - rate . 9 ) Adjust dispenser timers from 3 minutes to 5 minutes . 10 ) Re- label all dispensers with a " Diesel " label and the proper " Low Sulfur " or " Ultra - Low Sulfur" diesel labels . 11 ) Calibrate the meters on the dispensers . 12 ) Re - paint the fill manhole and re - stencil concrete appropriately . 13 ) Re - program your Veeder Root to indicate the proper thermal coefficients for diesel . Rev. 11/13/07