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I <br /> Mr. Hal Miller <br /> April 3, 1989 <br /> Page 3 <br /> The total nonmethane hydrocarbon emissions rate at this site <br /> during the month of February, 1989 was X0.00002 lbs/day, which <br /> did not exceed the permit maximum of 4.7 lbs/day. The soil vapor <br /> extraction system has been soneduled for weekly monitoring in the <br /> future. <br /> The monitoring data from the Soil Vapor Extraction System was <br /> used to calculate the potential total nonmethane hydrocarbon <br /> emissions to the atmosphere from this system if the carbon <br /> adsorption treatment system were not in use (see enclosed <br /> conversion calculation) . <br /> DATE BLOWER EFFLUENT POTENTIAL TOTAL NONMETHANE <br /> CONCENTRATIONS HYDROCARBON EMISSION RA'Z'E <br /> (ppm) (lbs/day) <br /> 2/3/89 22 1.35 <br /> 2/17/89 20 1.22 <br /> These calculations suggest that carbon treatment is no longer <br /> required to meet the total nonmethane hydrocarbon discharge <br /> limitations at this site. if you have any questions, please <br /> contact our Concord office. <br /> sincerely, <br /> GROUNDWATER TECHNOLOGY, INC. <br /> David D. Drury <br /> Project Engineer <br /> Attachments <br /> DDD:lf <br /> LR289401.0 <br /> ` k GRPL'AI)WATER <br /> l .a...J TECNSPLoci I\C. <br />