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d <br /> MASS BALANCE CALCULATIONS <br /> (Soil) <br /> Area 1: Former UST Pit. <br /> 33'x40'x9'= 11,880 ft3127ft' =440 yds' <br /> XTPHg=(200+450+290+320+6 5+2 6+2 0+<0 5)18= 158 9 ppm <br /> 440 yds'(1 4tons/yds3)(2000lbs/1 ton)(158 9 lb TPHg/1 x 106 lbs soil)= 196 lbs TPHg <br /> Area 2A: Dispenser Islands. <br /> 23'xl8'x6'=2,484/27ft'=92 yds' <br /> RTPHg=(2,100 ppm) <br /> 92 yds'(1 4tons/yds3)(2000lbs/1 ton)(2,100 lb TPHg/1 x 106 lbs soil)= 541 lb TPHg <br /> Area 2B: Dispenser Islands <br /> 23'x30'x6' =4,140 ft/27ft3 = 153 yds3 <br /> XTPHg=(14+2 1)12= 8 05 ppm <br /> 153 yds'(1 4tons/yds3)(2000lbs/1 ton)(8 05 lb TPHg/1 x 106 lbs soil)=3 4 lb TPHg <br /> Area 3: Current UST Pit. <br /> 36'x59'x7'= 14,868 ft3/27ft3 =551 yds3 <br /> 5<-TPHg=(38+44+34+190+15+13+<0 5)/7 =47 8 ppm <br /> 551 yds'(1 4tons/yds3)(2000lbs/i ton)(47 8 lb TPHg/1 x 101 lbs soil)=74 lb TPHg <br /> Area 4: Waste Oil UST. <br /> 7'xl4'xl' =98 ft3/27ft'=3 6 yds3 <br /> XTPHg=(2 4+13)/2= 19 ppm <br /> 3 6 yds3= (1 4tons/yds')(2000lbs11 ton)(1 9 lb TPHg/1 x 106 lbs soil)=0 02 lbs TPHg <br /> Total lbs of TPHg: approximately 814 lbs in soil beneath the site. <br />