Document daBkqX9bg23ZkYowaKJ5xpGm0

AR226-2152 R.F. Pinchot 6 June 2001  Steve Swearmgen Cathie Barton, DuET Debbie Mulrooney, DuET Tim Binmian, CRG Chronic Off^Site Exposure I Purpose: Identify the design parameters required s the average daily concentration off-site is below th and on-site is less than the AEL - Emission rate - Stack Height - Stack Height/building height ratio - Dilution Air flow Model used: Industrial Source Complex (ISC v.3); used by EPA for air toxics permitting 0 Results shown are using RDU meteorology data; F J& >^ 2 2 S CT M available this week; model results will be updated. (Tl H >! CO i m m o 6 P-l 0 ^ ^ o 0 CT\ ^f II M ^ C- 0 0 RP026179 EID476987 Map 1; Maximum concentration = Release Rate = 0,07 g/s Stack Flow Rate!!= 10,000 Stack Height =90 ft. Building Height = 60 ft  With reasonable design parameters^ th maximum yearly average concentratio expected to exist off-site;, with ZERO ABATEMENT of process vents and fugitive emissions is 10-30% of the CE 0.3|^g/m3 All process vent streams will be scrub with expected high efficiency (>90%, possibly >99.5%  Update model with FAY data when available Document model results including assumptions Expand model to determine wet and d deposition.