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--� <br /> f TABLE 3 <br /> MTBE MASS BALANCE CALCULATIONS <br /> (Dissolved MtBE in Groundwater August 12, 2004) <br /> k Parkinson's Hammer I-5 Arco <br /> 3250 West Hammer Lane, Stockton,California <br /> Zone 1: (500 ppb contour interval) <br /> Volume: n(13')(12')(15')=7,351 ft3 <br /> Pore Volume: 7,351 ft3 (30%porosity)=2,205 ft3 <br />!' MtBE =2,500 ppb-(2,500 lb MtBE/lx1091b H20) <br /> 2,205 ft�(7.48 gal/ft)(8.328 lb H20/gal)(2,500 lb MtBE/1x1O9 lb H20)=0.34 lb MtBE <br /> Zone 2: (50 ppb contour interval) <br /> t . Volume: [7r(35')(27')(15')] —[zc(13')(12')(15')] =37,181 ft3 <br /> Pore Volume: 37,181 ft3 (30%porosity)= 11,154 ft3 <br /> MtBE = 275 ppb=(275 lb MtBE/1x109 lb H20) <br /> 11,154 ft3(7.48 gal/ft3)(8.328 lb H20/gal)(275 lb MtBE/lx109 lb H20)=0.19 lb MtBE <br /> Zone 3: (5 ppb contour interval) <br /> Volume: [n(67')(48')(15')] — [7c(35')(27')(15')] = 107,018 ft3 <br /> Pore Volume: 107,018 ft3 (30%porosity)=32,106.ft3 <br /> MtBE = 19.25 ppb=(19.25 lb MtBE/1x109 Ib H20) <br /> 32,106 ft3(7.48 gal/ft)(8.328 lb H20/gal)(19.25 lb MtBE/1x109 lb H20)=0.04 lb MtBE <br /> Total dissolved MtBE in groundwater: 0.57 lb <br /> 1 <br /> .4 <br /> I <br /> 1 <br />