AfU ^-c^ CHRONIC TOXICITY TO EARLY LIFE STAGE OF FISH TEST SUBSTANCE Identity: Perfluorooctanesulfonate; may also be referred to as PFOS or FC-95. (1-Octanesulfonic acid, 1,1,2,2,3,3,4,4,5,5,6,6,77,8,8,8heptadecafluoro-, potassium salt, CAS #2795-39-3) Remarks field: The test substance is a white powder.

/IRZX-055& Summary PFOS Rat Cross-Fostering Study Numbers: 3M T-6295.13, Argus 418-014 ACnomalpytoiucanldR&eqLuoets:t 5P3F0O3S0)(Perfluorooctanesulfonate) - Lot 217, 98.4% pure (SMD C.A.S.

A R S 2 6 . 0705 ACUTE TOXICITY TO FISH (FATHEAD MINNOW) TEST SUBSTANCE___________________________________________ Identity: Mixture containing perfluorooctanesulfonate which may also be referred to as PFOS, FC-95, or as a component of FC-201F. (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 3M production lot number was 1.

JL&. 6 -- 0 7 G> NITRIFICATION INHIBITION T E S T .SUBST A NCE____________________________________________ Identity: Mixture containing perfluorooctanesulfonate, which may also be referred to as PFOS, FC-95, or as a component of FC-203CF-X or FC-203CF. (1-Octanesulfonic acid) (CAS # 2795-39-3).

4 K -2 2 6 _ Oi2Z BIODEGRADATION (BOD/COD) TEST SUBSTANCE_______________________________________ ____ Identity: Mixture containing perfluorooctanesulfonate which may also be referred to as PFOS, FC-95, or as a component of FC-3003. (1Octanesulfonic acid) (CAS # 2795-39-3).

Report 2457, June 1990 **e a u - / 6 5 ?

AR226-2961 DU FONT USE ONLY Du Pont HLR 448-91 Study Title STATIC, ACUTE, 96-HOUR LC50 OP TO FATHEAD MINNOWS (Pimepha Data Requirement Organisation for Economic Co-Operation and Development (OECD) Guideline for Testing Chemicals: 203 Author Keith B.

H-24889: In Vitro Chromosome Aberration Study in Human Peripheral Blood Lymphocytes AR226-3181 DuPont-6406 TRADE SECRET Testing Guidelines International Conference on Harmonisation (ICH) o f Technical Requirements for Registration o f Pharmaceuticals for Human Use.

- 070s M ICROBIOS M ICRO TOX T O X IC IT Y T E S T T E S T SU B STA N C E_________________________________________________ Identity: A mixture containing perfluorooctanesulfonate, which may also be referred to as PFO S, FC-95, or as a component of FC-2Q1F-X. (1Octanesulfonic acid) (C A S # 2795-39-3).

A H .A 2 .6 - 0 7 ) $ STUDY SUMMARY OF ENVIRONMENTAL EFFECTS OF LIGHT W ATER BRAND AFFF AND COMPONENTS -1991 TEST SUBSTANCE________________________________________________ Identity: A mixture containing perfluorooctanesulfonate, which may also be referred to as PFOS, FC-95, or as a component of FC-203. (1Octanesulfonic acid) (CAS # 2795-39-3).

Telephone: (702) 385^202 BRADLEY & MERRELL c/o Jones, Jones, Close & Brown 300 South Fourth Street, Seventh Floor Las Vegas, Nevada 89101-6026 Fax: (702) 385-1655 July 23, 1993 VIA HAND DELIVERY Honorable Lawrence R.

TO: FROM: RE: DATE: MEMORANDUM All members of the Nevada Power Plaintiff's Litigation Team Barbara Banks j> .

Siili JNE8 > JONES/ GLOS fi BROWN, CHARTERED v;S.xr;..

Telephone: (702) 385-4202 BRADLEY & MERRELL c/o Jones, Jones, Close & Brown 300 South Fourth Street, Seventh Floor Las Vegas, Nevada 89101-6026 July 14, 1993 Fax: (702) 385-1655 VIA TELEFAX Arvin Maskin, Esq.

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