I AR226-2215 EID294840 il Vapor Scavenging Coeffioent Liquid Precipitation Frozen Precipitation C8 Particle Density 2.2 o/cm8 3 .0 -s .o 1.0 *3.0 0.5* 1.0 0.3 - 0.5 0.1 -0.3 f 1 |Lpif ill 13b ilia ifir li _ ' a te is based on testing conducted at the Washington Works site in September, 1996. 6 Particulate scavenging coefficients for liquid precipitation are from Figure 1*111nthe EPA ISC Users Guide (Volume II). 6According to Section 1.4 of the EPA ISC Users Guide (Volume II), the scavenging rate coefficients for frozen precipitation are expected to be reduced to about 1/3 of the values In Figure 1*11. 7.0% 12.5% 6.8% 31.5% 42.2% 5.5% 20,0% 0.25% 8.25% 66.0% 0.75% 1.75% 3.5% 25.0% 69.0% o;o% 16.5% 3.5% 42.0% 38.0%

FOR DU PONT USE ONLY AR226-2947 Ou Font (HR 127*90 ' r'.

AR226-2960 DU PONT USE ONLY Study Title STATIC, ACUTE, 48- AND 64-HOUR EC50 0 Du Pont HLR 457-91 [TO Daphnia magna Organisation for Economic Co-Operation and Development (OECD) Guideline for'fes ting Chemicals: 202 Author Kevin N.

AR226-3050 Study Title Skin Irritation Test with K-21946 in Rabbits Laboratory Project ID Haskell Laboratory Report No. 784-96 Authpr Tracy A.

(Ji i/tudy No. 16U45 TA.

p. 1 - byo'j Journal o f Toxicology: C linical Toxicology Jan 1996 v34 n l p 2 1 ( 4 ) Page 1_________________________________________________________________ Pulmonary toxicity following exposure to an aerosolized leather protector. by Keith K.

fifL - o 6 9 *> ACUTE TOXICITY TO FISH (FATHEAD MINNOW) TEST SUBSTANCE_____________________ Identity: A mixture containing perfluorooctanesulfonate, which may also be referred to as PFOS, FC-95 or as a component of FC-201AF. (1Octanesulfonic acid) (CAS # 2795-39-3).

AR - 02So ACU TE TOXICITY TO AQUATIC IN V ERTEBRA TES (DAPHNIA MAGNA) T E S T S U B S T A N C E ___________________________________________________ Identity: A mixture containing perfluorooctanesulfonate, which may also be referred to a s P F O S , FC-95, or as a component of FC -787 or FC 787X. (1-Octanesulfonic acid) (C A S # 2795-39-3).

Corporate Occupational Medicine 3M Center, Building 220-3W-05 St.

M 236 - O 77#- ACUTE TOXICITY TO FISH (FATHEAD MINNOW) TEST SUBSTANCE___________________________________________ _ Identity: Mixture containing perfluorooctanesulfonate which may also be referred to as PFOS, FC-95, or as a component of FC-203FC. (1Octanesulfonic acid) (CAS # 2795-39-3).

C O V M fC > THE DEVELOPMENT SERVICES COMPANY AR X& *0452.

^ 216-0 5 /^ ACUTE TOXICITY TO FISH TEST SUBSTANCE Identity: Perfluorooctanoic acid; may also be referred to as PFOA, FC26, or FX-1001.

POLYMER PRODUCTS DEPARTMENT MANUFACTURING DIVISION AR226-2012 CC: R.

AR226-2038 "Roger J.

AR226-2407 INTEROFFICE MEMORANDUM Date: From; Dept i Tel No 13-Mar-1990 06:26pm Nilliam E.