Document mqyDnom1v0bNGY3vYwX6qVaZQ

rps eis 3M (~orporate Occupational Medicine 4poE neS 3M Center, Building 022(~-06-W-08 ri St. Paul, M[~ 55144-1000 YI651 737 4230 Office 651 733 9066 Fax J-- April 7, 2010 J Los 201, completed i signet witsheem3eDvomceiBnuielding 249 elon In March 2010, y~u completed your assignment with the 3M Decatur Building 2/49 demolition we ws ast FOS and disposal project. The purpose of this letter is to compare your baseline and end-of-project blood (serum) samples a Can sown. 192FF08 nd FFOA (perflluuooroooccttaanneessuullffoonnaattee,, CCssFF1177S8O053"":aanndd PPtlFFaOaOt AAwe((rppeeerruffsllueudoorrtooooocmctteaananosoauatrteee,,yCCo;7uFFr1~P55FCCOOO;S:)') concentrations. concentrations. Provided below are your baseline and end-of-assignment measurements. Your PFOS and PFOA Bo ton = sb). results are reported in parts per million (ppm = ~g/mL). omsy, pburoahsrEsmnLs pMBfaRahEom8D2000 PFOS: PFOA: April 9, 2009 Baseline_ 0.283 ppm 0.480 pprn March 8, 2010 End-of-PrNect 0.232 pprn 0.353 ppm ne ing nit You cn rf TTphrhoeejsseectdaagttiaviiennnditchaeteaenyyalooyuutrricPPaFFlOOvaSSriaaannbddiliPPtFFyOOofAAtccheoonnlccaeebnontrtrraaatttoiirooynnssmeddaiisddunnrooetmt eiinnntcc,rreeaaIsseeowwthhhieilrleewowwroodrrskk,iinnyggouoonndittdhhiiss. proj oct, given the analytical variability of the laboratory measurement. In other words, you did wi tn pain xd ar nao not have substantive occupational exposure while working on tl~is project. Your end-of-project concentrations remain above the average reported in the general population and are indicative of a pa your past occupational exposure. oacoEfEFOOS ndFFOOA ave sc bs shown to eitPrnossadePFBOesAtsB.ieYboeunrvsm Your levels ofPFOS and PFOA have not been shown to result in adverse health. Your levels ee pes ot cosines by continue to decline from your prior measurements. Because PFOS and PFOA have been shown belo le ee poses Shou ou pve ny to be slowly eliminated from the blood, you can expect your concentrations may decline by a ova DE. Bs (556 30) approximately 50 percent in 3 to 4 years without further exposure. Should you have any questions about your blood PFOA or PFOS results, please contact Dr. Bae!nxer (651-736-5347) or me. Si ly, FEL, 2. Geary OOlisseenn on Staff Scientist se Tel 651-737-8569 er By Buch GhCorporcpaion Mediin hyiin) cc: Dr. Betsy Buehrer (3M Corporate Occupational Medicine physician) -- EExxhhiibbiitt 2297 State of Minnesota v. 3M Co., Cour~ File No. 27-CV-10-28862 Sm: 3M MN02288255 22229977..00000011