Document kZjQD5Yag9vekEzb8J5eNZ1O

ildlife International, Ltd. E C O T O X IC O L O G Y & A N A L Y T IC A L T E S T IN G SERVIC ES December 1,2000 Ms. Susan A. Beach 3M Corporation Environmental Laboratory 935 Bush Avenue St. Paul, Minnesota 55144 Dear Susan: Enclosed please find the Addendum for the following study: 1. PFOS: An Activated Sludge, Respiration Inhibition Test Wildlife International, Ltd. Project No.: 454E-101 If you have any questions, please let me know. Sincerely, KRD/cyw8/beach Enclosures Edward C. Schaefer Manager, Biodegradation 8598 Com m erce Drive Easton, Maryland 21601 -Tel.410-822-8600 - Fax 4 10-822-0632 * E-mail ecotox@wildlifeintemational.com European Office: Bergkampweg I * 7231 C LW am sveld 'T h e Netherlands *Tel. 31 (0)575 - 573848 Fax. 3 1(0) 575 - 574813 * E-mail:aleopold@svorldonline.nl