Environmental Protection Agency EPA East, Mail Code 7405M 1200 Pennsylvania Avenue, NW Washington, DC 20460 "" 0O m0 --im on O C-J cn From : Bob Buck, DuPont, on behalf of the Telomer Research Program Subject : TRP Study Reports : Submission to AR-226 On behalf of the Telomer Research Program (TRP), the following study reports for work conducted by the TRP are submitted to the EPA for inclusion in Administrative Record 226.

J wesaomsassiss noon SFernotm:: Tor Subjects I mercredi 3 orctoobwre)2021 1552 A Final minutes meetiongwiSth AMCham onessential uE scs- 13 Oo ctoer 2) 021 Minutes meeting with AmCham on essential uses - 13 October 2021 APamrctihcaimpa:nts rerous) | ohnson) Commission] ov; fist solar eonsJ Johnson & Jonhson's) Dupont; SC Chevron) NEN chair F-g25 group).

Typical Landfill Monitoring Surface Water Monitoring - Ponds - Outfalls - Stormwater - Streams Groundwater Monitoring - Program dictated by hydrogeologic complexity - Quarterly or semi-annual Leachate Monitoring What we have learned from monitoring at landfills..... samH 0K0<f1t0> EID780228 Landfills On-site Summary Item Landfill Type Site 1 Engg Cap Site Wells 15 Sampling Events Over 20 On-site PFOA Range 0.058-30,500 (ppb) Site 2 Active 13 10 NQ-22.8 Site 3 Soil Cover 9 8 NQ-65.9 On-site PFOA Mean (Ppb) GW-SW Flow (gpy) PFOA Flux (lbs/yr) 2763 525,600 4.03 2.87 6,664,900 8.65 17.7 2,482,000 1.01 A S H 0 2 6E9 5ID0 780230 EID780230 J Groundwater Investigation Steering Team (GIST) H EID78023X I I Ho SB o H -J 00 otwo to WHD-0O3J tttUoool tWo to GIST Offsite Summary-3 Landfills Item GIST Offsite Sample # Off-site Samples Offsite PFOA Range O(pfpfbsi)te PFOA Mean (ppb) Sitel 1-mile 30 ND-0.636 0,04 Site 2 1-mile 53 ND-0.974 0.185 Site 3 2-mile 109 ND-14.3 1.46 Landfills-Overall Impressions Landfills are regulated by state permits Permits require: - Engineering controls - Monitoring plans Our experience demonstrates: --Engineering controls are effective for PFOA --TPFheOmAocnointotrriibnugticoonntdoutchteedeinnvdiircoantmesemntinimal EID780234 ; Actions The other Fluoropolymer LOI signatories will compare the DuPont data with then- industrial landfill data in order to develop ; i aonthuenr dlaenrsdtfainllds itnogPoFfOthAe contribution of environmental loadings S oKA m : !

Very poor leadership, the worst I have seen in the face of a serious issue since I have been with DuPont Bush spoke last evening, I cant deal with looking at or listening to him, did you?

.---- 1 MATERIAL TESTED: CSHlJWH^ SPONSOR: DuPont SpeciaH NOTEBOOK ID:"' SUBMITTER'S NOTEBOOK NUMBER: None available COMPOSITION^ Chemicals CONTAMINANTS: CAS REGISTRY:"Tsrone available PURITY: Not supplied by sponsor.

The pathology review was a joint projectofthe 3M Medical Department and DuPont Haskell Laboratory.

GENERAD XHFORKATXOX MATERIAL TESTED: ^2109^-- ^ STWOHXMS: TOST CODS: 0 - 0 SPONSOR: DuPont Specialty Chemicals BQTSBQOK XU : NOTEBOOK NO.: COMPOSITION: Nene submitted COHTMUinitTS: None COS REGISTRY: PORZTY: 30 TSST COXDXTXOX8 Nosinal concentrations taitfd: 0, 0.5, 1.0, 50, 500, and 5000 mg/L.

East, Mail Code 7405M 1200 Pennsylvania Avenue, NW Washington, DC 20460 From : Bob Buch, DuPont, on behalf of the Telomer Research Program at 0 7 0 po O ---oxi<pronu 33* o m :x 0 o cn ro Subgect : TR?

In particular an alternative product with which some of our products are treated is the DuPont Teflon-based finish.

(This (This sives 9ives a safety factor of 70 based on the DuPont information.)

In particular an alternative product with which some of our products are treated is the DuPont Teflon-based finish.

Mileu Consulting SPRL Att: Claire Dupont Chaussee de Charleroi 112 Brussels 1060 Belgia oYouxr reference: 2O0u15r/e4f5e3re6nce: Gi 134, 2009 CGasee haBndolmer: Notice of award of contract in competition for "Per- and polyfluoroalkyl ethers -- identity, production and use" Case no: 2019/4936 We refer to the tender competition * Per- and polyfluoroalkyl ethers - identity, production and use " (case number 2019/4936) and your offer dated 8 May 2019.

The group's members are 3M, AGC, Arkema, Chemours, Daikin Chemicals, DuPont, Gujarat Fluorochemicals, Honeywell, W.

Commissioner Sinkevicius had a meeting with industry representatives on PFAS on 4 July 2023 (16h00 to 17h00) Organisations/companies represented: Apple; Dupont; Polestar; Carl Zeiss AG; Solarge; Hanon Systems Deutschland; Chemours; Cefic; Hydrogen EU; EPEE; FPG; Ionysis.

MR rae - 3220 402 | | | --- --_ ARaz - 3220 Duwreonsw0 TRADE SECRET Study Tite H-24768: Subchronic Toxicity 90-Day Gavage Study in Rats `with One-Generation Reproduction Evaluations Volume 2f 5 Laboratory Project ID: DuPont-5990 "TEST GUIDELINES: U.S.