An SVE system is now operating on a plume that is 300 feet long, 50 feet wide and 12 feet deep with a porosity of 0.3, using 8 SVE wells each running at 200 ACFM. The average initial TCA (MW = 133.4 g/mole) concentrations found on the soil are 100 mg/m3 of soil and the clean-up goal is to achieve 0.01 mg/m3 of soil. The TCA removal rates for the SVE system were monitored during six two week events and averages were:

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3. [30 pts total] An SVE system is now operating on a plume that is 300 feet long, 50 feet wide and 12 feet deep with a porosity of 0.3, using 8 SVE wells each running at 200 ACFM. The average initial TCA (MW = 133.4 g/mole) concentrations found on the soil are 100 mg/m' of soil and the clean-up goal is to achieve 0.01 mg/m3 of soil. The TCA removal rates for the SVE system were monitored during six two week events and averages were: TCA in vapor exiting Blower Flow Blower (ug/m3 of air) (acfm) 5.25 1500 4.95 1600 5.55 1450 4.95 1550 6.05 1300 4.15 1750 Actual Pressure = 1 atm Actual Temperature 16OF a. [10 pts] Determine the theoretical amount of time (yr) the SVE system would need to operate and the removal rate (mg/min) to achieve the soil clean-up goal. b. [10 pts] Assuming the rate of TCA removal found in the initial sampling is not linearly extrapolated for the entire time to meet the clean-up goal, but rather drops by 50% after half of the TCA is removed and then drops by 50% again after three-quarters of the total TCA is removed revise the time estimate found in (a). c. [10 pts] Assuming that this state's air standard for 1,1,1 TCA is set at 940 ppbv (parts per billion by volume) at STP, which is 1 atm and 0 C, and a total emission rate shall not exceed 5.7 1b/hr, determine if the blower effluent at maximum initial removal rate concentrations (from data in table above) will require treatment prior to discharge to the local atmosphere