Rurak Safety; Health, and Environmental Manager Global Business Manager, APFO DuPont Fluoroproducts CRP Bid. 711/22I0-C P.O.

Dupont hazard risk assessments indicate that no remediation of currently contaminated soils or waters is warranted to maintain Dupont's Safety and Health objectives.

Dasher, Geologist, GroundwaterProgram, West Virginia DEP - Andrew Hartten, Principal Project Leader, DuPont Engineering Jack C.

AR226-3147 DuPont-3823 TRADE SECRET Study Title H-24335: Local Lymph Node Assay (LLNA) Laboratory Project ID: DuPont-3823 AUTHOR: Gregory S.

Our comments are grouped into three sections in this document: 1) Comments on DuPont's proposal to evaluate the ISCST3 model to determine maximum air; 2) Comments on DuPont's suggested proposal for using the modeled air concentrations to determine where ground water monitoring will be performed; and 3) Comments on DuPont's modeling/measurement approach.

This statement should be revised to indicate that if DuPont and GE pumping were to cease, the LHWA well field capture zone would extend beneath the Ohio River to the DuPont facility.

DuPont-6087 Csmpany Sanitized.

DuPont-3548 Company Sanitized.

DuPont-6087 fipmpany Sanitized.

DuPont does not have sufficient basis to verify this information, nor can DuPont attest to the validity or accuracy o f it.

DuPont has an internal Acceptable Exposure Limit (AEL) of 0.010 mg/m3 (0.57 ppb) for an 8- or 12hour time-weighted average exposure.

DuPont does not have sufficient basis to verify this information, nor can DuPont attest to the validity or accuracy o f it.

F MAM - -3-2T/ TRADE SECRET ftkUM -.32X1 DuPont-11238 Study Title H-25357: Approximate Lethal Dose (ALD) by Skin Absorption in Rabbits Laboratory Project ID: DuPont-11238 A u t h o r : Carol Finlay, B.A.

DuPont-3324 Company Sanitized.

Onr comments are grouped into three sections in this document: 1) Comments on DuPont's proposal to evaluate the ISCST3 model to determine maximum air; 2) Comments on DuPont's suggested proposal for using the modeled air concentrations to determine where ground water monitoring will be performed; and 3) Comments on DuPont's modeling/measurement approach.