Document G6BYgDrzD1352oXxdKKyd0J2V

AR226-1400 DD OD fie. s e \H-00 DuPont INTEROFFICE MEMORANDUM Date From: Dept: Tel No 12-May-1987 03:06pm EST TONY PLAYTIS PLAYTIS TEFTECH 2775 TO: ROGER ZIPFEL ( ZIPFEL ) CC: JOHN CRUM C CRUM ) Subject: C8 In Water Attached is a copy of the analytical repent for our five water samples, which are identified as follows. #1 - Washington Works drinking fountain, B3. #2 - Powell's General Store, Washington WV * ~ - Lubeck Pennzcil, Lubeck WV #4 - Mason's Village Market, Little Hocking OH #5 - 812 20th Street, Vienna WV C. L. Hill obtained samples 1-4 by driving to each location and asking to have a plastic bottle filled with drinking water. Sample 5 was taken by D. K. Moore at his home. All samples were taken on 3/13/87. C 8 ,Note that the results are expressed as ppb F. When converted to ppb the result of 1.3 ppb becomes 1.9 ppb. This result is higher than those from 1984, but considering how close we are to the detection limit of the test, the difference is probably not significant. RJZ009208 E1D079091 000195 Polymer Products Department Research & Development Division Experimental Station -- cc: M. A. Kaiser S R Ld&S M. Lombarski B. S. Shepard G. J. Sloan PRAL File I.C. - 256 - 256 , - 269 - 323 - 323 - 256 - 323 ANALYTICAL REPORT May 7, 1987 To: A. J. Playtis - PPD, Washington Works From: M. J. Vilone and R. M. Vasta - PPD, ESL 269 PERFLUOROOCTANOATE (C8) IN WATER (Job No. 870-441; PRAL Nos. 87-2933 - 2937, Notebook No. E44875) Five samples of water have been analyzed for perfluorooctanoate (C8) by electron capture gas chromatography. Method ES-567 was used with the following modifications: sample size was 10 g; lyophilization was -18-20 hours; concentration of perfluorodecanoate internal standard was decreased 10 fold. Spiked standards at concentrations of 0.4, 0.5, 0.8, 1.0 and 1.9 ppb were examined. A reproducible detectable peak was observed for 0.4 ppb and we have used this as our detection limit. No C8 peak was detected in the spiked standards <.4 ppb. For the quantitation we had linear calibration curves over the range of 0.4 to 1.9 ppb. The samples were freeze dried, derivitized, and analyzed in duplicate. The results are expressed as ppb fluoride where ppb F 0.688 x ppb perfluorooctanoate. The results are given in the attached table. If you have any questions, don't hesitate to call. gmn Attachment Keywords: GC Perfluorooctanoate Water EID079092 000196 RJZ009209 PRAL 87-2933 87-2934 87-2935 87-2936 87-2937 Perfluorooctanoate in Water Designation ngF/g. H.,0 (ppb) #1 n.d. #2 / -O #3 1.3 f ^ ) #4 n.d. #5 n.d. * n.d. none detected; detection limit 0.4 ppb RJZ009210 000197 EID079093 u aPont I NTEROFFICE MEMQ R A N D U M Date: From: Dept: Tel No: 4 --May-- 1987 02:09pm EGT TONY PLAYTIS PTLEFATYETCIHS 2775 TG: ROGER ZIPFEL ( ZIPFEL ) Subject: G3 in Water The -following results have been received by phone; . a letter will foil ow by the end of the week. The detection limit of the test is 0.4 ppb. Washington Works drinking fountain, EJ.3 Powell's General Store, Wash ington WV Lubeck Pennzoi1, Lubeck WV Mason's Village Mar ket, Little Hacking OH 312 20th Street, Vienna WV <0.4 1.3 1.3 1di.4 <0.4 1izGOir/ni 000198 EID079094