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' Former Manna Pro Site Page 4 <br /> Project No 207 3 <br />' Appendix A <br /> Table A4 - Calculation of Dissolved Contaminant Mass <br /> - Direct Measurement Method <br /> Zone Contaminant Zone Area Zone Vol. Water Mass Contaminant Mass <br /> Cone (C) A (V) =62=(0)=V (=Water Mass+Q <br /> 1 <br /> 1 100,000 ppb 1,023 s f 23,529 c f 510,579 lbs 51 lbs <br /> 2 60,000 ppb 3,533 s f 81,259 c f 1,763,320 lbs 105 lbs <br /> 3 15,000 b 34,082 s f 806,886 c f 17,509426 lbs 262 lbs <br /> 4 5,000 ppb 16,156 s f 371,588 c f 8,063459 lbs 40 lbs <br /> 5 500 ppb 19,365 s f 445,395 c f 9,665,071 lbs 5 lbs <br /> TOTAL 463 lbs <br /> Where, <br /> V =Volume of zone in cubic feet <br /> C = Average groundwater concentration expressed as a ratio <br /> 0= Porosity of soil = 0 35 <br /> I • Water weighs 62 pounds per cubic foot <br /> To summarize, the estimated contaminant mass in the sub-surface is, <br /> • Saturated Zone - Bound Phase—22,313 lbs <br /> • Dissolved Phase - 463 <br /> Using and specific density for the contaminant of 0 9, the contaminant mass estimates <br /> translate volumetrically to slightly under 3,000 gallons in the adsorbed phase of the saturated <br /> zone, and about 62 gallons in the dissolved phase <br /> 1 <br /> 1 <br /> 1 <br />' 2937 Veneman Ave,#B240 Geo-Phase Environmental Inc Phone(209)569-0293 <br /> Modesto,CA 95356 Fax(209)569-0295 <br />