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.!*8rSS\ I V - 60 Table y-7. Chrysotlle asbestos content of river water 3uni6 0 River treotewood PA Jewton-Hamilton ,ewl r.town \mity Hall ;onnccticot A. :naan, Vt. ` Littleton, KH .ebanon, NH ;reerificl<5. tass. iidfiellown, 'onn. 3/71 4/71 5/71 i^6/71 .7/71 8/71 9/71 -- 0.0 0.0 0.34 0.12 0.0 1.07 2.42 0/71 11/71 12/71 1/72 2/72 3/72 0.16 O.OS 0.77 0.48 1.48 6.0 0.0 0.0 0.0 0.0 0.0 0.76 0.16 0.6? 0.68 1.59 1.66 0.78 0.0 - 0.62 0.0 2.84 d.6 2.53 0.0 0.0 0.0 0.0 0.32 1.63 1.44 1.09 2.28 0.29 2.26 3.94 - - 0.06 0.0 3.90 - - 12.46 3.67 0.39 0.33 0.0 1.77 0.46 0.69 0.0 0.14 0.73 0.13 0.0 3.63 0.64 0.0 0.0 o.e? 0.69 0.51 0.0 0.76 0.22 0.44 0.11 0.33 0.45 0.42 0.0 0.13 0.0 0.0 0.52 0.49 0.0 0.30 0.37 0.27 0.0 X.6B 6.18 0.90 0.0 0.16 3 .07 0.18 1.17 0.44 0.27 3.16 1.21 0.51 1.67 3.05 1.21 2.66 1.76 3.61 0.0 0.23 0.13 0.79 1.13 2.28 Note; Ml data in micrograms per litre. All values were determined by electron microscopic observations. No i_bres_yoc_vi.sJb)j, in any of jthc_ samples using the optical microscope at 450 x magniflcation. The only publication dealing with asbestos fibre counts in drinking water within the EEC countries was published in 1974 by Elzenga, Meyer and Rtumphius. Data were reported from a preliminary investigation in the Nether lands carried out in 1969 and 1970 dealing with watcrsamplcs from 22 mains and connected domestic pipes. Asbestos fibres were detected with light microscopy at a low magnification of SO x. In 1972 voter samples were taken at the same place as in 1969 and 1970 from a 31 and a 35 year old AC wotcrr.ain through which a calcium carbonate aggressive type of water had boon distributed. Fibre counts were carried out by election niciosccpy and light microscopy at magni fications of 10.000 x and 500 x. Identification of the particles was carried out by shape-recognition supplemented with the resells of electron diffraction and mjeroprobe analysis. ^ :\y & wat lno dia fro cop fib per lit 13 ret fib Net 100 hi'b mai the col vv.f ni l Tre in 6001 07B3 produced by rord