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(4) B5-39 benzene 0 006 <br /> toluene 0 007 <br /> ---------------------------------- <br /> Total: 0 013 ppm <br /> To calculate the average total hydrocarbons: <br /> (1)+(2)+(3)+(4) 0 0079+17 48+0.042+0.013 <br /> ---------------------- — ----------------------------------- — 4 38 ppm <br /> # of samples 4 <br /> Using the average total concentration of hydrocarbons, the volume of remaining <br /> hydrocarbons in the soil can be calculated <br /> 13 tons 2000 lbs 4 38 ppm 1 gal <br /> (127 cubic yards) X -------------- X -------------- X ---------------- X ----------- = 0 22 gallons <br /> cu yd 1 ton 1,000,000 6 67 lbs <br /> Approximately 0 22 gallons of hydrocarbons remain in soil at the site <br /> i <br /> 5 <br />