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Evaluation of Chemicals and Risk Assessment Friedrich-Henkel-Weg 1 - 25 D - 44149 Dortmund, Germany phone: fax: e-mail: 2

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STLS E V E R N TRENT STL Chicago 2417 Bond Street University Park, IL 60466 Tel: 708 534 5200 Fax: 708 534 5211 mvw.sf/-/ni:.com S ig n a tu re Name : Rij^yCrrl C , Wright Title: Pt o jecL Manager E-Mail : rwright@st.l- inc .com Thi.s Report Contains Leaders in F.nvironmenta!

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 Sediment, POTW Sludge, and Landfill Leachate Samples Mobile, AL (W2151) Centre Analytical Laboratory Report No. 023-014S (Revision 1) Revision Date 3/28/01 Testing Laboratory Centre Analytical Laboratory, Inc. 3048 Research Drive State College, PA 16801 3M E nvironm ental Laboratory C ontact Kent R.

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- 0664- FOSA or PFOSA Ongoing - / 000502 3M MEDICAL DEPARTMENT, CORPORATE TOXICOLOGY Protocol for Study No.

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3M Environmental Laboratory AR 1*26-0026 G) M ethod Extraction of Potassium Perfluorooctanesulfonate or other Fluorochemical Compounds from Liver for Analysis using HPLC - Electrospray/M ass Spectrometry Method Number: ETS-8-6.0 Author: Lisa Clemen, Robert Wynne Approved By: Laboratory Manager tGroup Leader --------- - a Technical Reviewer Adoption Date: o j l i h U x Revision Date: ~y ^ h < i Date Date Oilmh Date 1.0 Scope and Application 1.1 Scope: This method is for the extraction of potassium perfluorooctanesulfonate (PFOS) or other fluorochemical compounds from liver. 1.2 Applicable Compounds: Fluorochemical surfactants or other fluorinated compounds. 1.3 Matrices: Rabbit, rat, bovine, and monkey livers or other tissues as designated in the validation report.

3M Environmental Laboratory R126-0005 M ethod A nalysis of Potassium Perfluorooctanesulfonate or O ther Fluorochemicals in Serum Extracts U sing H PLC-Electrospray/M ass Spectrometry Method Number: ETS-8-5.1 Author: Lisa Clemen, Robert Wynne Approved By: 'L l Laboratory Manager Adoption Date: 03/01/99 Revision Date: <V / 2 C / Date Group Leader Technical Reviewer Date dh i / m Date 1.0 S c o p e a n d A p p l ic a t io n __________________________________________________________________ 1.1 Scope: This method describes the analysis of serum extracts for fluorochemical surfactants using HPLC-electrospray/mass spectrometry. 1.2 Applicable Compounds: Fluorochemical surfactants or other fluorinated compounds, or other ionizable compounds. 1.3 Matrices: Rabbit, rat, bovine, monkey, and human serum, or other fluids as designated in the validation report.

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FT,-143 Comparison Results W a s h in g to n W o rk s Q u a rte rly f 'f l ru m p lin g 1Q01 <.irnp Irl GAl IFRV RANNf Y w rsT w Eu rie tD # i GALLERY RANNtY w est w F iirin n n BV ANK IC S LCSD MS MSD notes RPR PFNA - relative percent recovery (%) for the surrogate standard perfhjorononanoic acid which is spiked m'o each sample and associated quality control sample during sample preparation for analysts LCS'LCSD * laboratory conimi sptkr/laboratory control spike duplicate rna'rt sptke/malmr spiknduplicate NA - samnle noi included tn bah h analysis r,r rrn (histon*. r-n (' ) units ug/l 399 ug/l 548 ug/L 1 58 RPR PFNA RPR PFNA RPR PFNA RPR PFNA RPR PFNA RPR PFNA RPR PFNA RPR PFNA 18 16 18 12 9 NA 16 19 oc fprnpospd TOP) 183 309 4 15 97 101 80 110 96 91 NA NA CO u lJ C O U) 00Q005 prepared for John Bowman on 5/17/01

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