AR226-2327 A ir Em issions M odeling Plan A ir dispersion modeling will be performed to calculate ambient ground-level air concentrations o f C8 emissions from the Chambers Works site.

Z-47 REV. 10-50 PB W A S H IN G T O N W O R K S P .O .

RECYCLED "I AR226-2630 00 AR226-2630 DuPont Modeling Methodology and Results Dordrecht Site June 2003 About the Model I Industrial Source Complex Short Term 3 (ISCST3) I Sold/used globally, including in The Netherlands http://www.phoenix-r.co.jp/products/products.htm I Input I Stack height, diameter i Flowrate, temperature I Mass of pollutant (mass per time) i Local meteorological data (Rotterdam, 1996 - 2000) 1 Output l Ambient air concentrations in ug/m3 I Max values and locations outside the property line Prevailing wind 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 Dordrecht M odeling Inputs Stack Param eters PTFE S t a c k H eight (m) 20.95 S ta c k Diam.

RECYCLED erno AR226-2662 Precise Research.

AR226-2910 E.

AR226-3044 Study Title Skin Irritation Test with H-21951 in Rabbits Laboratory Project ID Haskell Laboratory Report No. 782-96 Author Tracy A.

RECVCIO 000418 j-h-h - 9vW IP TABLE 1 TEFLON FINE POWPER/DISPERSIOK OPERATORS C -8 BLOOD SAMPLE RESULTS DATE OF C-8 IN FIRST BLOOD- SAMPLE jiffC^l- DAYS IN JOB AT SAMPLE DATE DATE OF SECOND SAMPLE C-8 IN BLOOD (PPM) DAYS IN JOB AT SAMPLE BATE 1 / W w( 2/18/82^ 1Q/8/81 8/7/81*'*' lO / l/ sT ** , 2/11/!

$ rr 3M Katherine E.

P-1 3M ENVIRONMENTAL LABORATORY REPORT NO.

P-1 AR R 9 .6 - 562*1.

Andrea V.

3M ENVIRONMENTAL LABORATORY REPORT NO.

Taft/ Taft Stettinius & Hollister LLP 425 Walnut Street, Suite 1 8 0 0 /Cincinnati, OH 45202-3957/Tel: 513.381.2838/Fax: 513.381.0205 /www.taftlaw.com Cincinnati / Cleveland / Columbus / Dayton / Indianapolis / Northern Kentucky / Phoenix / Beijing Robert A.

Dyno 'Nobel Americas Mr.

AR 2.3.6 - 0% 6 B IO D E G R A D A T IO N (BOD/COD) T E S T S U B S T A N C E __________________________________________________ Identity: A mixture containing perfluorooctanesulfonate, which m ay a lso be referred to a s P F O S , FC-95, or a s a com ponent of FC -20 6C E . (1Octanesulfonic acid) (C A S # 2795-39-3).