Document jmwvMrO5GY945L9YGa6zDv9zQ

: AR226~1673 AIR QUALITY DISPERSION MODELING ANALYSIS OF C8 EMISSIONS DuPont Fayetteville, North Carolina Facility Prepared by: Charles J. Zarzecki DuPont Engineering Technology (DuET) Environmental Section `Wilmington, DE 19898 April 1,2003 000076 [R-- FTFheeDouPtontpaecFeslaeiny(mCenaFnrpolbiiaonoocngoobnombde6suiaccclsyite.eeindTn!hemsodmewalilngg ohfeadamonridoanesrshe yrsve bon sono cada ihspppry a techniques doeptaeiled in thedU.LCS. REPPA'asr"sG)uideline on Air Quality Models", which is PR -- Doing Thefollowing is the stack information that was assembled in order 3to conduct theairquality ate Teg Location: 697638 meters E, 3857918 meters N `Stack height: 85 ft SFtlaocwkrdaitaem:et1e1r,:5010.A5C8FM 28 8 2bo C8emission rate: 0.00224 g's = /54 4,52 z 78 be 1hacid Fluoride 3. Meteorological Data Thecrs ocatinhtkesBlymetrogelaservatons Pope AlForsBes Fayetteville, NC. Meteorological observations at the airport are considered representative of the site andofconditionsaffectingtransport and dispersionofstack emissions. Therefore, fBiavseeyweearrseoufsheoduirnlythseurreffaicneeodbasierqvuaatliiotnysdfirosmptheeroabnssaeliryvsoaistn.ion station at Pope Air Force: `Houly meteorological data forthe period 1995-1999 was used in ths stay. Concurrent twicedaly upper air data from the upairpobseervatrion station located in GreensborNoC, was used along with Pope surface temperatures to obain hourlymixing depths. 4. MotaSection These surountnhe Feencillpctspintson-atan. The. EPA procedures classify land use within 3 Kilometersofth ste by the Auer method. Review of eto ty lg wi rin Seva remeber. Uth.aSt.thGeeoalroeagiicsawlelSlurovveeyr 5(U0S%GnSo)n-muarpbsa,n.aerTihaleptheortroaignraipmhmse,diaantdesliytesvuirsoitusncdlienarglyth inpdliacnattecdan Wilisinmi, we vcd ene SurceComplStTem Made (SCST3 Fo te A a WA the primary model to estimate long-term pollutant concentrations. ISCST3 is a steady-state Gaussian model recommended by the U.S. EPA, and is included in the "Guidelines on Air Str. : r[s-- BN 00007 ofsequential hourly meteorology from the observation facility located at PopeAr Force: Base as described above. 5. ReceptorSelection A receptor grid with 100-meierspacingextendingout 10 a minimum distance o2f kam from tmheeteplrainntiprrvoalpse.rtNy olinreecweapstourssedw.erReepcleapcteodrsinwseirdee tahlesoplpalnatcperdoopnertthyelpinreo.peTrhtyelrienceeaptto2r5grid cclaenvbateiosnesenwienreFiigmuproert1. edTfhreommoddiegiltawlalsevrautniwointmhtahpe(eDleEvMat)edfielrsmapirnovhiediegdhtboypttihoen.USTGeSr.rain AUSCSa.rtEePsiAaninretcheepGtuoirgdreildionfotehnsisAtiyrpQueialictoynsMioddeeralbsl(yUm.oS.reEPdAe,nse1t9h9a8n) rfoercmoomdmeelnindgeadbfyitlhtey oftis type. 6. ModelingProcedures `"mTohdeemloisntgorfeaclelntrveceerpstioornso.fAIlSlCmSoTd3el(voeprtsiioonns0w0e1r0e1)stwa(0stuhseedUSi.nthEePaAi qrueagluliattyordyisdpeefrasuilotn vimmeedriaotsfeIivSCoSiT3n.coTftihheenmFoaydieetlttwevaiysllreupnainntthiesrmuorraelmtohadne50s%incerutrhale. aAnndyareefaficntsthoef ianertohedyInSaCmSiTc3domowdnewlaisnhgcanaaulsyesids.byAsitrruqcutaulrietsyaddijsapceernstion mtohedemloidneglewdassaccoknsdwuecreteindclonuadned mbooudre-lbiyn-gboreusrulbtassiwseurseisnugmtmhaefriivzeeydeafrorstohfemaentneuoarlolaovgeircaaglindgatpaerdieosd.cribed above. The C8 7. Results "Tmhaexdiismpuemrspiroendmioctdeedlainnmgurae)sualvtesraargeepCr8esceoantceedintnraTtaibolneis1.0A.0s0c14a1nbgems'e.eniThnitshctonbceen,ttrhaeion occautrthse Fayetplean vproipelrtyllinee. Theresulsarepresentedgraphicallyin Figure2. [-- 3 000028 1B0L7E1090008368S Year 1995 19% 1997 1998 1999 Table 1 Maximum Predicted C8 Concentrations Maximum Annual Prediction 000115ugin 0.00140 ug/m 0.00141 vg/m 0.00120 ug/m 0.00126ug Location 696207E, 38S6312N 698376E, 3858634N. 698386E, 385861 IN. 698376E, 3858634N 698386E, 3858611N. Crate ` 00002y 10sL7E10900083786 Figur1e ReceptorGrid R TE EEe a eBeEITERS } CSomoep EP EC E e crane s sIsoz7o1050038s87 Figur2e Fayetteville C8 - Annual Average 1997 MetData , 3860000 <Q [ JA . ./ - | > A{ a \ J 7os pd frpean,"| T= H= N HU& T ST5 RAS Aes Lg Se Ji N sss!; aasionn "_ hyn -- ~~ TON i ; 3~ N insp i owCo e "on mors creer 000050 10715005