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Measure&record"A"and"Z,"and then peform the following calculation: <br /> _/ I ° Drop tube seal surface to the bottom of the tank <br /> (subtract) <br /> Upper drop tube flange to the edge of the upper tube adapter <br /> -(subtract) <br /> C4.5 Reference offset <br /> _(equals) <br /> Final shutoff volume height <br /> 7pr <br /> al7record <br /> Use the tank chart provided by the tank ta <br /> hemanufactur^er to record and calculate the following: r,a', gal Final shutoff volume po <br /> (divide by) <br /> gal Actual tank capacity <br /> X(Muliply by) <br /> 100 <br /> 4 <br /> oa ' _(equals) If the final shutoff volume <br /> percentage is 9S%or less,the <br /> Final shutoff volume percentage <br /> installation conforms to FFS and <br /> industry recommended practices. <br /> gal Actual tank capacity <br /> -(subtract) The final Shutoff Volume Percentage may <br /> be greater than 9S%as long as the ullage <br /> gal Final shutoff volume volume remaining is greater than or <br /> _(equals) equal to 2S0 gallons so that"...none of <br /> the fittings located on the top of the tank <br /> R, Ullage volume remaining 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(AHJ). <br />