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Federal EPA technical standards for overfill pre- may take actions to stop the delivery process. <br /> vention of petroleum UST's allow the use of ball The EPA requirements are that this flow restriction <br /> float vent valves that restrict the delivery flow must occur when the tank is no more than 90%full. <br /> when the UST is overfilled. <br /> This flow restriction is a means of alerting the The OPW 53VML series is designed to con- <br /> sistently and dramatically reduce delivery flow <br /> transfer operator,or delivery attendant so that he rate to 31/2-5 gallons per minute. <br /> Grade level <br /> Q'• o .� 'C7� o o . • <br /> p� OoOo:a <br /> :. .. _ ... ..... <br /> 4,ir^: Jl;...,.I.s1�.(J�:.�';! 'r;ii.p:!i�:ly.. ]•..>.^�:'�.": '�I v;-•�'' <br /> ,ill Y;�: t• C:..�", Ti.SY�":....(t•. Y�'> 7.:.: <br /> .t 11y S'1 ;�,': IY:•rL%�� .rI''._�c{.:yy • 1�.�.j.i.j, <br /> ^i :i" w }i C':-'tai y1•.lif <br /> 1 1J,.II <br /> II!nn fili�r)n <br /> V-71 Ilei!ICI <br /> i. <br /> I. l ii) flt;iin <br /> USI <br /> I n <br /> 10-0 of total <br /> Figure 1 rr tank capacity a: <br /> de <br /> Appropriate for '',c"calibl as t <br /> L� ^rmincd from <br /> OPW fittings only. Fent orifice appropriale tan! <br /> chart <br />