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BACK TO MAIN Centre Analytical Laboratories, Inc. 3048 Research Drive State College, PA 16801 www.centrelab.com ^P hone: (814) 231 -8032 Fax: (814) 231 -1253 or (814) 231 -1580 Analytical Report Fluorochemical Characterization of Surface Water Samples Columbus, GA (W2336) Centre Analytical Laboratory Report No. 023-014E (Revision 1) Revision Date 3/22/01 Testing Laboratory Centre Analytical Laboratory, Inc. 3048 Research Drive State College, PA 16301 3M Environmental Laboratory Contact Kent R.

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AR226-1406 A f t S U S - l/f06 IN THE CIRCUIT COURT OF WOOD COUNTY, WEST VIRGINIA JACKW.

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AR226-2661 RECYCLED Exygen RESEARCH I : Precise Research.

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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.

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NOTICE: The information provided to the agency contains information that 3M voluntarily has submitted as part of our continuing discussions with the EPA regarding fluorochemistry.