Document ZndLk42bbDvb0V6oNdNvVGMr7

AR226-2269 STT-91-1 11. APPENDIX I SPRUANCE C8 ASSESSHENT E. I. DU FONT DE NEMOURS & CO., INC. Fibers Business CC: G. L. Kennedy - Haskell G. A. Hapka - Legal R. A. Reich- Engr. - Louviecs J. D- Chidley R. L- Dunn C. P- Mihal R. C- Yeatts D. M. Schwartz G. R- Sisson J. S. Tschritter SPEURNCE FIBERS PLANT Richmond,- Virginia December 4, 1991 TO: ^f. C. MOORS - TEFLON TBCHNICM. FROM: T. V. ROBEBISOi'I - ENvTROMMENTAL AFFAIES SPHUftNCS C8 ASSESSMEKI 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 . wastewafcer 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 wastewafcer treatment system), and at the discharge of the WITS which "combines with the non-contact streams discharging to the James Biver. C8 content in these sanples appear in line with your earlier estimates. Assuming Outfall 002 flow of 10 MMGD, a total site effluent of 14.4 MMGD (winter time), and a James River low flow 7Q10 of 408 WSSO, a river concentration of 0.4 ppb is calculated as a worst case- 1 would appreciate your comments on these sample results. TVR:mcp 29:1.30 CAB000054 EXD546903