Document zdyoVZK0JYbNZmRwpejZQErQg

AR226-2392 \ V y- Du Pon t I N T E R O F F I C E MEMORANDUM Dates From* Dept s T el No 12-May-1987 03s06pm EST TONY PLAYTIS PLAYTIS TEFTECH 2775 T O s ROGER ZIPFEL ( ZIPFEL ) CCs JOHN CRUM ( CRUM ) Subjects C8 In Water A t t ached is a copy of the analytical report for our five water samples, which are identified as follows. #1 - Washington W o r k s drinking fountain, 83. #2 - Powell's General Store, Washington WO Lbeck Pennzoil, Lbeck WV #4 - Mason's Village Market, Little Hocking OH #5 - 812 20th Street, Vienna WV C. L. Hill o b t ained s a m p l e s 1-4 by driving to each location and asking to have a plastic bottle f i l l e d w i t h drink i n g water. Sample 5 w a s taken by D. K, M o o r e at his home. A l l samples w e r e taken on 3/13/87. Note that t he-results are expressed as ppb F. When c o n v erted to ppb C8, the result of 1.3 p p b becomes 1.9 ppb. This result is higher than those from 1984, but c o n s i d e r i n g how c lose w e are to the detection limit of the test, the difference is probably not significant. RJZQ09208 X E1D136972 4K '``ft* ) x Polymer Products Department _ Research & Development Division Experimental Station M. A. Kaiser S. R . Laas M. bombarski B, S. Shepard G. j. Sloan PRAL File I.C. - 256 - 256 i, - 269 - 323 - 323 - 256 - 323 ANALYTICAL REPORT May 7, 1987 To: A. J. Playtis - PPD, Washington Works Prora: M. J. Vilone and R. M. Vasta - PPD, ESL 269 "7r\ <^(f~ GW PERFLOROOCTANOATE (CS) IN WATER (Job No. 870-441; PRAL Nos. 87-2933 - 2937, Notebook No..E.44875) five samples of water have been analyzed for perfluorooctanoate (C8) bv electron capture gas chromatography. Method E5-567 was used with the following modifications: sample size was 10 g; lyophilization was -18-20 hors; concentration of perfluorodecanoate internal standard was decreased !0 fold Spiked standards at concentrations of 0.4, 0.5, 0.8, 1.0 and l.y PP 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 K r S of o!? to 1?9 ppb. The samples were freeze dried, derivitized, and analyzed in duplicate. The results are expressed as ppb fluoride where ppb P = 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 60600Z r E BIP136973 \ PBAIi 87-2933 87-2934 87-2935 87-2936 87-2937 Perfluorooctanoate in Water Desiqnation ngF/g, H,0 (jPb) #1 #2 #3 #4 ' 5 n.d. 1.3 ' O n.d. n.d. c-S cp*O c . a R n d = none detected; detection limit = 0.4 ppb ` u, RJZ009210 EID136974