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<br /> Former Manna Pro Site Page 3
<br />' Project No 207 3
<br /> Appendix A
<br /> • Table A2- Calculation of Bound Contaminant Mass
<br />' Zone Contaminant Zone Vol. Soil Mass Contaminant
<br /> Cone (C) (V) =62.Pd.V Mass
<br />' (— Soil Mass. C)
<br /> Al 11,700 pprn 98 c f 10,329 lbs 121 lbs
<br /> A2 500 ppm 861 c f 90,749 lbs 45 lbs
<br /> A3 50 ppm 1,701 c f 179,285 lbs 9 lbs
<br /> A4 5 pprn 4,382 c f 461,862 lbs 2 lbs
<br /> 131 2,500 ppm, 21,049 c f 2,218,564 lbs 5,546 lbs
<br /> 132 500 ppm. 36,197 c f 3,815,163 lbs 1,907 lbs
<br /> 133 50 ppm. 117,313 c f 12,364,790 lbs 618 lbs
<br /> B4 5 ppm 307,825 c f 32,444,755 lbs 162 lbs
<br /> fC1 2,500 ppm 38,055 c f 4,010,997 lbs 10,027 lbs
<br /> C2 500 ppm 56,435 c f 5,948,249 lbs 2,974 lbs
<br />' C3 50 ppm 40,760 c f 4,296,104 lbs 215 lbs
<br /> C4 5 ppm 59,440 c f 6,264,976 lbs 31 lbs
<br /> •
<br /> DI 500 ppm 8,510 c f 896,954 lbs 448 lbs
<br /> D2 54 ppm, 36,390 c f 3,835,506 lbs 192 lbs
<br /> D3 5 ppm 29,960 c f 3,157,784 lbs 16 lbs
<br /> TOTAL 22,313 lbs
<br /> I Where,
<br /> I
<br /> V —volume of zone in cubic feet
<br /> I Pd = bulk density of soil = 1 70 (corresponds to 0=0 35)
<br /> C = Soil contaminant concentration expressed as a ratio
<br /> Water weighs 62 pounds per cubic foot
<br /> IDissolved Mass - Groundwater Measurement Method
<br /> One method to calculate the dissolved contaminant mass is to contour the contaminant
<br /> concentration in the groundwater These contours are based on the TPH levels found in
<br /> recent water samples The contour map of TPH concentrations in groundwater, divides the
<br /> contaminant plume into 5 zones based on total concentration The calculation assumes that
<br /> Ithe dissolved gasoline impacts 23 vertical feet of groundwater
<br /> I The following table summarizes the calculation for this method of estimating dissolved phase
<br /> contaminant mass
<br /> 2937 Veneman Ave ,#B240 Geo-Phase Environmental Inc Phone(209)569-0293
<br /> I Modesto, CA 95356 Fax(209)569-0295
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