TECHNICAL REPORT SUMMARY BACK TO MAIN D ale 8/24/81 TO: TECHNICAL COMMUNICATIONS CENTER - 201-2CN (Important If report is printed an both sides o f paper, send two copies to TCC.)

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Wildlife International, Ltd. - 1- Project Number 454A-104 PFOS: A 48-HOUR STATIC ACUTE TOXICITY TEST WITH THE CLADOCERAN {Daphnid magna) ADDENDUM WILDLIFE INTERNATIONAL, LTD.

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AR226-2395 INTEROFFICE MEMORANDUM Dates From: Dept: Tel No: ii~May~19B8 10:03am ANTHONY J.

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AR226-2671 RECYCLED AR226-2671 SOIL COLUMN LEACHING STUDY FOR PFOA Date: August 2004 Project No.: 507423 18983990.04006 CORPORATE REMEDIATION GROUP An Alliance between DuPont and URS Diamond Barley Mill Plaza, Building 27 Wilmington, Delaware 19805 1.0 STUDY PURPOSE & PRINCIPLE A soil column leaching study for perfluorooctanoic acid (PFOA) was designed by DuPont to determine the vertical mobility or leaching o f air deposited ammonium perfluorooctanoate (APFO)/rainwater mobilized PFOA through clayey silt and silty clay soil.

MU- & o 412 DuPont-8868 TRADE SECRET Study Title H-25171: Bacterial Reverse Mutation Test with an Independent Repeat Assay Authors Valentine O.

450 $#2&& - $ & & & Haskell Laboratory for Toxicology and Industrial Medicine March 13,2003 TO: MR] L Study in Rats Repeated-Dose Oral Toxicity Gavage Range Finder cc: G.

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AR226-3325 Conclusions From Previous Review Company Sanitized.

Op-) SfrOOO 0 9 J 000488 DATA SUMMARY Chemical: Perfluorooctanoic Acid Site: Washington Works, Parkersburg, West Virginia Date of Monitoring; 1979 Matrix: PFOA in Whole Blood Operation: Teflon Job Title Number Sampled Entire Cohort Males Females Operators Males Females Mechanics Males Females Laboratorians Males Females Supervision Males Females 72 72 0 61 61 0 5 5 0 2 2 0 4 4 0 Minimum Concentration (ppm) 0.1 0.1 - 0.1 0.1 - 0.6 0.6 - 0.31 0.31 - 0.53 0.53 - Mean (ppm) 4.99 4.99 - 5.74 5.74 - 0.71 0.71 - 0.52 0.52 - 1.14 1.14 - Median (ppm) 2.8 2.8 . 3.9 3.9 - 0.65 0.65 - 0.52 0.52 - 0.72 0.72 .- Maximum Concentration (ppm) 28.4 28.4 - 28.4 28.4 - 0.9 0.9 - 0.72 0.72 - 2.6 2.6 - Standard j Deviation i 6.24 6.24 - 6.48 6.48 - 0.13 0.13 - 0.29 0.29 - 0.99 0.99 - Comments: Samples analyzed by National Medical Services Data extracted from WW site database by site industrial hygienist Tony Playtis Descriptive statistics calculated using Microsoft Excel Operation indicates work assignment of person at time of sample and does not reflect past work history Prepared by: Barbara J.