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Measure & record "A" and "Z," and then peform the following calculation: <br />L J 6. 5 7 Drop tube seal surface to the bottom of the tank <br />- (subtract) <br />.71 601 Upper drop tube flange to the edge of the upper tube adapter <br />- (subtract) <br />4.5" Reference offset <br />_ (equals) <br />final shutoff volume height <br />Locate the final shutoff volume <br />height on the tank chart <br />Use the tank chart provided by the tank provided by the tank <br />manufacturer to record and calculate the following: manufacturer, and record the <br />S % gal Final shutoff volume closest corresponding votume. <br />(divide by) <br />9 7 ) $ gal Actual tank rapacity <br />X (muliply by) <br />100 <br />(equals) tf the final shutoff volume <br />percentage is 95% or less, the <br />Final shutoff volume percentage installation conforms to FFS and <br />industry recommended practices. <br />gal Actualtankcapacity <br />(subtract) <br />57 dal Final shutoff volume <br />_ (equals) <br />Wage volume remaining <br />The final Shutoff Volume Percentage may <br />be greater than 95% as long as the ullage <br />volume remaining is greater than or <br />equal to 250 gallons, so that "...none of <br />the fittings located on the top of the tank <br />are exposed to product due to <br />overfilling," according to EPA 40 CFR Part <br />280. The installation must also meet all <br />applicable regulatory requirements, and <br />must be acceptable to the Authority <br />Having Jurisdiction (AHI). <br />