This report contains some results for Little Hocking post- * Attachment 9 is a June 25, 2003 letter from DuPont to the West Virginia Department of `EwnavtierrosnumpepnltyarlesPurlottsecftoiroWne(sctopVyirtgoinGiIaSaTndmeOmhbioe.rs) reporting 2TM quarterof2003 public i`dWeenttriufsitestahantytahdediitnifoonramlatdioocnumperonvtisdsedhoiwnitnhgisglreotuenrdwwialtlesratmiosnfyitEoPrAi'nsg dnaeteadsp.rioIrfDtouPDoenctember NGoITvhSeeTmGmbIeeSmrbT2em0r0es1mcboenrtsinaluso1erceccievievde mthoentmhalryialnydnqudarqtuearrltyerrelpyoertpsofrosr wthoartkaruendseurmtmhaerCioznesenntthOerSduemomeaeruyyiRnegposrhte.e 000002 Mr.

While the Draft Risk Assessment does not establish a safe level for /7 hup://www.littlehockingwater.org/January%202005%20water%20notice.htm EXHIBIT 3 2/2/2008 January 2005 Supplemental Noticeof Contamination Page20f3 C8, the DartalfetasRtisokneAosrsgeasnsimzeantitodnr~amtahteicEanlvliyruonndmeernetsatlimWaotreksihnugmGarnohuepal(t"hErWisGk"s)as-shoacisatteadkewnitthheCp8osition that eixgpnoosruirneg.daAtasloinnekienxgaCm8plteo,vEarWioGuspocianntcserosut(it.eh.atmtahmemDarrayft,RtiesstkicAuslsare,spsamnecnrteadtiiscc,oaunndtslicvaern)c.er risks by questionLsitatlbeouHtocitksipnrgotweactnitvsetnoesbse. sTuhreeyDoraufatreRiaswkaArseosefsbsomtehntthceaDnrbaeftfRoiusnkd AosnstehsesImnetnetrnaentdatE: WG's hhttp:p/:///wewwwg.oregpa/.igsosvuieosp/pPtFinCtsr//2p0f0o5a0/1pf1o2a/rsicsik.enhctema.nalEyWsiGs'pshp.analysis can be found at: DuPont's Worker Study than On 1,000 January DuPont W1a1,sh2i0n0g5,toDnuWPoonrtksanenmopulnoyceeedsr.esuIlntsthoeafstruedcye,nDtuhPeoalntth osbtsuedryvietdcoanndaupcptreodxiomfamtoere10 epexrpcoesnetdiinncdrievaisdeuailns."

Dos DuPont HLO 907-96 NAmSA Lab.

Maas 3288 470 AR2A6 _ R82 Dwg --~ TRADE SECRET Study Title 90-Day Gavage Study i'nHR-a2t5s42w5i:thSOunbec-hGreonneircTaotxiionciRteyproductionEvaluations Volume 3 of 5 Laboratory Project ID: DuPont-11418 `TEST GUIDELINES: U.S.

AR226-2312 Charles J Zarzecki ' 03/13/2003 03:48 PM To: Catherine A Barton/AE/DuPont cc: Subject: Fayetteville Results Cathie, I ran all 5 years ('95 - '99) for Fayetteville using the updated information.

AR226-2314 ^ Charles J Zarzecki ' 03/17/200311:09 AM To: Catherine A Barton/AE/DuPont cc: Subject A ER M O D Met Data Hope you're having a wonderful conference call.

Job Description 2001 2000 OGprearnautloarr Polykette 3174 5805 20876 672 0T8as 081 0&0 AFuitnoecPloauvdeeOrpDeirsapteorrsion 1229 ar 2189 017s0 43 118 2445 ods Other DuPont Employees 1.1 022 28 001349 002323 000373 00.7465 001820 049 01253 1153 =ONPYsXaE)mployees. 1232 2o5a 00286s 017 2 000291 0D0030054

AR226-2314 / Charles J Zarzecki 03/17/2003 11:09 AM To: cc: Subject Catherine A Barton/AE/DuPont AERMOD Met Data Hope you're having a wonderful conference call.

AR226_ 04H] | DUPONT TELOMER MEETING MONDAY, DECEMBER 17, 2001 | Hee Toomer |mame | pwn] 1:00.3:00 PM.

AR226-2312 ^ Charles J Zaizecki 03/13/2003 03:48 PM To: cc: Subject: Catherine A Barton/AE/DuPont Fayetteville Results Cathie.

AR226-2300 fi Charles J Zarzecki 02/21/2003 1230 PM To: Catherine A Barton/AE/DuPont co: Subject: Actual 2002 Results C a th y, The maximum annual prediction fo r actual 2002 emissions is 1.36 ug/m3, occurring at the plant property fine.

HL 15,388 White powder toy 21, 1984 E.I. duPont de Nemours & Co.

AR226-2652 42 AR226-2652 SEPTEMBER 2002 THROUGH AUGUST 2003 AIR DISPERSION MODELING ANALYSIS OF APFO EMISSIONS DuPont Washington Works Facility Parkersburg, West Virginia Prepared for: West Virginia Department of Environmental Protection Division of Air Quality 7012 MacCorkle Ave, SE Charleston, WV 25304-2943 Prepared by: DuPont Engineering Technology (DuET) Environmental Section Wilmmgton,DE 19898 October 17,2003 1.

In total it is estimated the combined DuPont emissions and machine shop emissions to waste is 3.5 kg PTFE per year via manufacture.

Introduction DuPont conducted a it dispersion m odeling o f APFO* em issions from its W ashington W orks facility 'located finff PaHrefsSurg] W V T tfciffiB ^V M itiitE ic63to predict long-term am bient air concentrations o f APFO resulting from actual plant emissions that occurred during the period o f September, 2002 through August, 2003.