Document gvpBV7npGL06woQmQB2oL0dL

AR226-2269 STT-91-1 APPENDIX I SPRUANCE C8 ASSESSMENT II. ( E. I- DU PONT DE NEMOURS & CO., INC. cc: G. L. Kennedy - Haskell G. A. Hapka - Legal Fibers Business R. A. Reich- Engr. - Louviets J. D. Chidley R. L. Dunn . C. P. Mihal R. C- Yeatts D. M. Schwartz G. R. Sisson J. S. Tschritter SPRUANCE FIBERS PLANT Richmond,- Virginia December 4, 1991 TO: v4. C. MOORE - TEFLON TECHNICAL FROM: T. V. ROBERTSON - ENVIRONMENTAL AFFAIRS SPRUANCE C8 ASSESSMENT As a result of our discussions of 11/1/91, Environmental Affairs has sampled various points in the Spruance Teflon process as well as the site wastewater treatment system for ammonium perfluorooctanate (C8). The results are contained in the attached table. C8 is used as a dispersant to make PTFE at Parkersburg. PTFE is used at Spruance to make Teflon fiber. C8 is an impurity in PTFE and, thus, is introduced into the process at Spruance. The sampling scheme employed evaluated the C8 content at the wash water discharge in the spinning operation, in the air emissions control scrubber effluent, in - the area process sewer, in the site composite process sewer (inlet to wastewater treatment system), and at the discharge of the W3TS which 'combines with the non-contact streams discharging to the James' River. C8 content in these samples appear in line with your earlier estimates. Assuming Outfall 002 flow of 10 MMGD, a total site effluent of 14.4 MPIGD (winter time), and a James River low flow 7Q10 of 408 MMGD, a river concentration of 0.4 ppb is calculated as a worst case. I would appreciate your comments on these sample results. TVR:mcp 29:1.30 CAB000054 EID546903