CC; A.

AR226-2046 fct^L Roger J.Zipfel L2 10/14/99 11:57PM To: cc: Subject: Chart of High levels of C-8 on B-162 & B-124 Boots PPE FOR ROOF AREAS OH B-124 & S-152 HIGH C-8 LEVELS C-8 III AIR DMA * 3-162 LEVELS - UP TO 4.3 PPB VS. 0.56 PPB KEt* B-124 LEVELS - UP TO 2.75 PPB ALSO HAVE MtST LADEN WITH C-8 FROM EXHAUST STACK PPS REQUIREMENTS * B-162 ROOF - BaiBBa'KtrHG PROTECTXOM REQOIRED AT HIGH LOCATIONS * B-124 ROOF ~ BBEATHIMO ftMD SKIH PROTECTION BEOUIR2D FOR EXTENDED (MORE TOW 10 MIN) STAY CftUSB - HICB EMISSIONS FROM" C-8 SCRUBBEH BXHADST SCROBBER EXHAUST GENERATES HIST W HOMID OCCASIONS MIST HAS TOAM t,V!

AR226-2056 > 3 (.

AR226-2229 ^ g-5 || |5 |i t ^ &!

AR226-2299 Current Permft/Applicatlon/POFiC 1823A 815D 815D 1353A Pre-Existing 614A 614A 781 1953 2365A 2365A 2365A FP/D D1 Cooler FP/D 03 Cooler FP/D 02 Bypass FP/D D3 Bypass Note; For some vents the surfactant rate is less than the total particulatereported In Air Emissions Inventorywhich can Include polymer dust.

AR226-2502 OiiTwil W.einifimWuh P !

AR226-2528 TOXICOLOGY LIMITS TLV AEL CEGA CEGW ufl/m3 100 10 0.3 jgpfa 5.6 0.56 0.0015 1.0 CALCULATED DOSE - AEL - CE6 100 ug/day 6 ug/day EID079258

AR226-2537 UNITED STATES ENVIRONMENTAL PROTECTION AGENCY Region III 841 Chestnut Building Philadelphia, Pennsylvania 19107 6NV1R6NMENTAI owes In Reply Refer To; (3HW52) CERTIFIED MAIL RETUEILJRECEIPT REQUESTED 8EP 3 0 1991 PIAMT nig COPY l0 NOT RIMOVt W.

AR226-2550 DuPont Washington Works RCRA Facility Investigation Results Review Oct.28,1999 * * * * IID156232 Proposed Agenda Introductions Site Background Site Hydrogeology RFI Scope of Work RFI Results Conclusions and Recommendations Wrap-Up EID156233 Desited Meeting Outcomes To familiarize the EPA project team with the Washington Works site physical setting To share the results obtained from the recently completed RCRA Facility Investigation To provide perspective on the RFI results To propose a path forward that will ensure continued protection of human health and the environment SID156234 Main Messages for Today: The DuPont Washington Works site is well characterised and well understood, as a result of over 10 years of investigation and monitoring, The combination of TRMs and the active site hydraulic control program ensure protection of human health and the environment from site SWMUs.

AR226-2641 30 AR226-2641 DuPont Modeling Methodology and Results Shimizu Site June 2003 About the Model I Industrial Source Complex Short Term 3 (ISCST3) I Sold/used globally, including in Japan http://www,phoenix-r.co.jp/products/products.htm I Input I Stack height, diameter I Flowrate, temperature I Mass of pollutant (kilogram per hour) I Local meteorological data (Shizouka 1997, 98, 99) I Output I Ambient air concentrations in ug/m3 I Max values-and locations outside the property line Facility Ambient annual ground level concentration in ug/m3 Model Calculations I Ambient air concentrations based on Gaussian Equation I Concentration a function of a vertical term and a dispersion term I Vertical term based on stack height, receptor elevation, plume rise, mixing I Dispersion parameters describe distribution of pollutant in lateral and vertical Shimizu Modeling Inputs Stack Parameters ^e-scrubber exil (or tine powder scrubber (called "AC Scrubber" on jPmoaslp-s)c_iu_fa_b_ere_x_it_fo_r _fin_e_p_ow_d_e_r scrubber (called -AC Scrubber' on Imap) [MP-2 scrubber E Plant: copolymer IplanlforPFAandFEPJ IP-2 building; copolymer type micro- powder Operates 24 hour per day. 180 days Per year Operates 24 hours per day. 180 days ^ryear Operates 24 hours per day, 270 days per year Operates 24 per day, 200 days per year \ ^ ^16.1 I) Given in emait of 4/17/03 trpm Hideiaka Hiromaisu: 600 Correct stack height?

AR226-2664 54 RES EARC H .

PRODUCT AEEA: DUPON ^ CLOSING REPORT AR226-2734 ADDENDUM #1 ^ FINE POWDER / DISPERSION AUTHOR TLMAYLE-B168,WW SCION-CROP 14-1286 ^ye^svs^______ TANO.

AR226-2765 FOR DU POKT USE ONLY Copies to: E.

, FOR DU PONT USE ONLY -'ril...

FORDUPONTUSEONLY AR226-2962 Du Pont HLO 432-91 StudyTitle Skin Sens itization Test with in Guinea Pigs StudyCompletedOn July 31, 1991 ContractingLaboratory Pharmakon Research International, Inc .