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6 . 2 Prediction of Spill Characteristics - 40 CFR 112 . 7( b ) <br /> Spill scenarios are summarized in Table 2 "POTENTIAL SPILL SCENARIOS" and described <br /> below: <br /> Potential Spill Predictions, Volumes and Rates [§112.7( b)] <br /> Table 2 <br /> POTENTIAL SPILL SCENARIOS <br /> Source Type of Failure Volume (gal.) Rate Flow Direction Containment <br /> (gpm) <br /> Leak of tank, Paved Concrete <br /> Diesel fuel AST piping' 10000 200 Drainage to Secondary <br /> , <br /> dispensing hose Pond Containment <br /> orequipment Structure <br /> Delivery Truck Broken hose 129- Paved Paved area <br /> Unloading connection 500' 150 Drainage to with drainage <br /> Pond to pond <br /> Truck tank Paved Paved area <br /> Delivery truck failure 6,0002 200 Drainage to with drainage <br /> Pond to pond <br /> Hose rupture, Paved Paved area <br /> Vehicle fueling tank leak, overfill 25 25 Drainage to with drainage <br /> Pond to pond <br /> Bulk lubricant Rupture or 275 50 Inside Shop Double <br /> topple Structure Walled AST <br /> Drums Shop Structure Shop Structure <br /> lubricant Drum topple 8-14 @ 55 15 paved drains a pond <br /> (lubricant) g - Containment Palle <br /> Used oil AST Rupture or 275 50 Inside Shop Double <br /> topple Structure Walled AST <br /> At off-loading rates of approximately 129-150 gallons per minute (gpm). The estimated loss of 500 <br /> gallons represents time to shut off appropriate valving equipment utilizing API Recommended Practice <br /> 1007. <br /> z Volume of largest single compartment. <br /> 1 . During unloading of diesel fuel to the 10, 000 gallon AST used by mobile equipment. <br /> Hose connection is located within the AST containment. In the event of a delivery truck <br /> tank rupture, the estimated volume of spill could be as much as 6, 000 gallons or the <br /> largest compartment of the tanker. The concrete paved area would capture the spill <br /> and direct it to the low point between shop and ready mix plant. Product recovery and <br /> pavement clean-up would be necessary. <br /> 2 . During transfer of lubricating product to or from the 275 gallon AST's used by mobile <br /> equipment In the event of a delivery truck tank rupture, the estimated volume of spill <br /> could be as much as 1 , 000 gallons orthe largest compartment of the tanker. The paved <br /> area would capture a portion of a spill and limit the spread in this area. Local absorption <br /> would be unlikely. Product recovery would be necessary. <br /> KNIFE RIVER-STOCKTON PLANT <br /> 11 <br />