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e � <br /> Nod <br /> ALTERNATIVE A 3 <br /> Supporting Calculations <br /> Proposed Excavation Dimensions and Soil Volume(Weight Calculations: <br /> Overburden: (67.5'L x 10'H x 20'W)+(15'L x 15'H x 20'D)= 18,000 fl/27 fl/yd3=667 yd' <br /> 667 yd'x 1.68 tons/yd'= 1,120.56 tons x 2,000 lbs/ton=2,241,120 lbs of overburden <br /> Soil Disposal:(67.5'L x 17'H x 20'W)+(15'L x i0'H x 20'W)=25,950 f13/27 f 3/yd3=961 yd3 <br /> 961 yd'x 1.68 tons/yd'= 1,614tons x 2,000 Ibs/ton=3,229,333 lbs of soil to be disposed <br /> Soil Density: Assume 1.68 tons/yd3 or 125 lbs/f1 <br /> Average TPH in soil to be removed: <br /> Based on TPHd and TPHg at each known sample location within area of proposed excavation <br /> including samples from: <br /> SB-1 (3,500+ 120)&(6,800+89) <br /> SB-2(4,100+88) <br /> MW-2(14,000+870)&(1,500+ 110) <br /> MW-4(1,100+85) <br /> HA-8(490+3.3)&(690+37) <br /> HA-9(1,500+660) <br /> MW-3 (270+31) <br /> Total TPHd&g from 10 samples=36,043.3 mg/Kg TPHd&g/ 10 samples=3,604.33 Avg. <br /> TPH <br /> (3,229,333 lbs impacted soil x 3,604.33 mg/Kg Avg.TPHd&g concentrationy 1,000,000= <br /> 11,639.60 lbs of TPHd&g to be removed <br /> Cost per pound TPHd&g: <br /> Cost estimate range from preceding page: $276,300.00 to$322,500.00 <br /> $276,300.00 low range cost/ 11,639.60 Ibs TPHd&g=$23.73/lb TPHd&g removed <br /> $322,500.00 high range cost/ 11,639.60 lbs TPH d&g=$27.70/lb TPHd&g removed <br /> R:ICONTGRAMStockton\CAPlCap Addendum Costs&Supporting Calcs <br />