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MICROBICS MICROTOX TOXICITY TEST TEST SUBSTANCE Identity: tPoerafsluPoFrDodSe,caFnCe-s1u2l0f,onoarte3,MaSmammopnlieuJm29s0al5t-;1m.a(y1-aDlescoanbeesruelffeornriecd ahceinde,ic1o,s1a,f2l,u2or.o3-,,34a,m4m.5o,n5i6u,6m.7s7al,t8,8C8,A9S,1#0,61709,0160--42-7) Rbuetmylarckelsl:osToelsvte s(aapmpprloexiimsaatemliyxt2u5re%otfestthesutbessttasnucbes,ta3n7c.e5i%n bwuattyelr and cNeollcoaslocluvleatainodns3w7e.r5e%mwaatdeer)t.o Aaldljuvsatlufeosr trheepoarctteudalrecloantceetnotrtahtisiomnioxftutrhee. test substance in the test sample.

: CORNING Hazleton MUTAGENICITY TESTWITH "43% IN THE SALMONELLA - ESCHERICHIA T6342 {ACoie omnes COLIMAMMALIAN-MICROSONE RESSPhSE MUTATION ASSAY Nn a FINAL REPORT AUTHOR Timothy E.

Larry R.

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yz AR 226 -- 0825 J BIODEGRADATION (BOD/COD) IESTSUBSTANCE Identity: A mixture containing perfluorooctanesulfonate, which may also be referred to as PFOS, FC-95, or as a component of FC-600. (1-Octanesulfonic acid, 1,12,2,3,3,4.4,6,5,6,6.7,7.8,8.8heptadecafluoro-, potassium salt, CAS# 2795-39-3) Remarks: The 3M production lot number was not noted.

- A T-2253 "AL ORIGINAL ARG -- 0965 w*ihUKEH, - 0800 - 37> anaAabtTseiorerspAutedimoDniinsiatnsdrtirBbaiutotitioronannosfafnoKdr-mEEtalhtiyimloinnFaOotfSiEoN-n-IEAotCfhCyialncbFOoeSneE-d14 Sanaary 19, 1983 gel 0 uo lh Conducted Att During: Conducted By: R3ikeCrentLearboratories, Inc.

BACK TO MAIN TOXICITY TO AQUATIC PLANTS (Marine Diatom, Skeletonema costatum) TEST SUBSTANCE Identity: Perfluorooctanesulfonate; may also be referred to as PFOS or FC-95. (1-Octanesulfonic acid, 1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8heptadecafluoro-, potassium salt, CAS # 2795-39-3) Remarks: Sample from 3M production lot number 217.

ENCLOSURE 4 Description of the 3M Decatur Inactive Landfill Containment Structure At the 3M Decatur site, a RCRA interim remedial measures (IRM)program is currently underway to construct a containment structure for an inactive landfill.

ACUTE TOXICITY TO BLUEGILL SUNFISH TEST SUBSTANCE Identity: Perfluorooctanesulfonate; may also be referred to as PFOS or FC-95. (1-Octanesulfonic acid, 1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8heptadecafluoro-, potassium salt, CAS # 2795-39-3) Remarks: The test substance is a white powder (3M Lot 583) of uncharacterized purity.

Toxicological Summary PFOS Dietary Chronic Pilot Reproductive Study: Northern Bobwhite Test Substance: Perfluorooctanesulfonate (PFOS) Structure: 1-Octanesulfonic acid, 1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8heptadecafluoro-potassium salt.

AR226-2148 SSG jerator: [\n 1 )i\MJ5 freform F ressure: 5C OOPS1 Date:8-?

AR226-2215 ' Date Is based on testing conducted at the Washington Works site in September, 1996. b Particulata scavenging coefficients for liquid precipitation are from Figure 1-111n the EPA ISO Users Guide (Volume li).

AR226-2238 Particle Scavenging Coefficient Estimation Atmospheric aerosol particles below the cloud line can be absorbed into rain droplets during precipitation events.