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Protocol.PFOS: A 96-Hou Freshwater Diatom (Navicu PROTOCOL PFOS: A 96-HOUR T03UCITY TEST WITH THE FRESHWATER DIATOM (Naviculapelliculosa) U.S.Fn*omncnW ProtectioAngmcy Series850 -EcologicalEffectsTest Guiddines OPPTS Nunber 850.5400 3M Lab RecpiesNto. ln723 submittedto 3M Corporation EnvironmentalLaboratory 935 Bush Avam'..., St.Paid, Minnesotit 55 IIM WildlffeInternationalL,td.. 8599 Commera-,Drivc Easton,Maryland 21601 (410)822-8600 September 17, 1999 WILDLIFE INTF-RNATIONALT LTD PFOS: A 96-HOUR TOMCITY TEST WrrH THE FRESHWATER DIATOM (tvaviculapelliculosa) SPONSO SPONSOR!