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EM 1110-1-4001 <br /> 3 Jun 02 <br /> where <br /> Q=the air extraction rate(L 3/T) <br /> t'=elapsed SVE time <br /> C»,o6,re=extracted concentration <br /> The extraction rate Q is usually constant over specified penods making the integration straightforward An <br /> order-of-magnitude estimate for the total initial mass will be obtained by letting the integration extend to <br /> infinity <br /> 9-13 <br />