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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 January, 1969 was X0.00002 lbs/day, which did <br /> not exceed the permit maximum of 4.7 lbs/day. <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 were not in use (see enclosed conversion <br /> calculation) . <br /> DATE BLOWER EFFLUENT POTENTIAL TOTAL NONHETHANE <br /> CONCENTRATIONS HYDROCARBON EMISSION RATE <br /> (ppm) (lbs/day) <br /> 2/19/$9 35 2.14 <br /> 1/23/89 28 1.71 <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 /> Vi . �ry <br /> Project Engineer <br /> Attachments <br /> DDD:lf <br /> LR289401.D <br /> -_ GROUNDWATER <br /> TECIiWI.KA'.INC. <br />