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r <br /> RECEPTOR EXPOSURE CALCULATIONS <br /> FOR HYDROCHLORIC ACID <br /> Assume: Flowrate = 225 scfm = 451 acfm®60OF <br /> Hydrochloric Acid concentration = 42 ppmv (maximum loading) <br /> Allowable hydrochloric acid concentrations in air = 7.0 ug/m'3 <br /> Assumes no building downwash. <br /> Model: SCREEN3 <br /> Assumes as a basis: flowrate of HCl of I g/s <br /> Name of Run: Tracy VOC Remediation System - Hydrochloric Acid/f4 <br /> BASIS: Concentration Concentration Concentration <br /> Concentration of HCI at Elie of HCl at the of HCl at the <br /> of HCl at the receptor. based receptor, based receptor, based <br /> receptor, based on 1.29 lb/day on 1.0 Ib/day on 0.5 lb/day <br /> Distance on 1.0 g/s (0.0067 g/s) (0.0052 g/s) (0.0026 g/s) <br /> (meters) (u m'3) (u m'3) (u m'3) (u m'3) <br /> I 0 0 0 0 <br /> 10 0 0 0 0 <br /> 20 57 0 0 0 <br /> 30 230 2 1 l <br /> 40 337 2 2 1 <br /> 50 395 3 2 l <br /> 100 473 3 2 1 <br /> 200 464 3 2 1 <br /> 300 445 3 2 1 <br /> 400 381 3 2 1 <br /> 500 311 1 2 1 <br /> 1000) 1-)8 1 1 0 <br /> 2000 121 1 1 0 <br /> 3000 84 1 0 0 <br /> 4000 62 0 0 0 <br /> 50001 49 0 0 0 <br /> Note: these t:alculations are valid. using assumptions provided on attached <br /> modeling print out: Tracy VOC Remediation System - Hydrochloric Acid #4 <br /> u/publicitouctunracvieirmodel/SCRUBBER.XES/Run#4 Page 1 12122197110:45 AM <br />