Ta'ft/ Taft Stettinius & Hollister LLP 425 Walnut Street, Suite 1800 / Cincinnati, OH 45202-3957 / Tel : 513 .381 .2838 / Fax : 513 .381 .0205 / www .taftlaw .com Cincinnati / Cleveland / Columbus / Dayton / Indianapolis / Northern Kentucky / Phoenix / Beijing ,4e22- S9r,-) 2- ROBERT A.

ARNG5 3M ENVIRONMENTAL LABORATORY METHOD ANALYSIS OF POTASSIUM PERFLUOROOCTANESULFONATE OR OTHER FLUOROCHEMICALS IN SERUM EXTRACTS USING HPLC-ELECTROSPRAY/MASS SPECTROMETRY Method Number: ETS-8-5.1 Author: Lisa Clemen, Robert Wynne Approved By.

.

PFOS: ARX.

.

Attachments to Letter to C.

@ HAZLETON oroncs ones ve cron s onIO 07 KINSMAN BLYD + .0.B0KT643 + MADISON, WISCONSIN $3767 - PH6O082N614E71 + LXT0358RAZTALWES 05 FINAL REPORT EETEEE\ ( sanazies \w,e 4 as ges" FRTIOONGXENIRECSOOL6.TOAGYPMESRIEKNIRINVNSIGCE&SMANUFACTURING COMPANY ST.

Oral Rassintipnrdeegsnansttamtsatoefr29990 i ---- Conducted at: -- E Study Director: cssonscors : SRSiaNefsep,tyaSaEyvesahmluueaartsiiioenonnLaaboorratory Febeuary 1, 1581 co mare 13, 4 E.

BIODEGRADATION AR2716-0336 TEST SUBSTANCE Identity: N-Ethylperfluorooctanesulfonamide; may also be referred to as U1464, EtFOSA, EtPOSA, F-6309, or FX-12. (1Octanesulfonamide, 1,1,2,2,3,3,4,4,5,5.6,6,7,7,8,8,8heptadecafluoro-N-ethyl-, CAS # 4151-50-2) Remarks: Material is a white solid.

Co .

: `The Society of the I30P sr cam i, soso Plastics Industry, Inc.

ROPES ARRAG_ 123] 1111 A, WONTON NEWIOR SANFIANGSCO WASNGTON.

AR RR 6 1358 3M Strategic Toxicology Laboratory Study Title: Acute Inhalation Limit Toxicity Study of Perfluoroctanesulfonyl Fluoride (POSF) T-70983 `Test Number (sample): ~~ T-7098.3 (Perfluoroctanesulfony!

BAR226-1375 persons comrmomiaL cer 3BWWGC.. sCsuaolynpenenpep-ter2,,#5N.

AR226-1379 AA A | | i | i|i | eee ARADG -- 1379 cc: 1B.03W..