Document NqZYara25oZwdY9zyLLn5oJ8

30 January 1968 Mr Jeremiah R Lynch Asst.Chi of, Environmental Activities Field Studies Occupational Health Program Department of Health, Biducation and Welfare National Center for Urban and Industrial Health 1014 Broadway Cincinnati, Ohio 45202,. Dear Mr Lynch, 1 am writing to thank you for the most useful Information contained in your letter and attachments of 17 January 1968 regarding brake lining decomposition. Our studies bo far are in agreement vrlth your findings in that we have been unable to find.'fibres during brake cleaning i.u service garages using thermal precipitators and membrane filters. With many thanks. Yours sincerely Dr I) E Hickish Industrial Hygiene Specialist 33^0 Room 1/163 DEH/YJS 8006 1197 PRODUCED BY FORD