Document 2j2xj1917dDrEVY1kNXwO1dLN

fur den Aufsichtsbezirk Westfalen HI. ^em ystehead.es Aktenzeichen angeben) Der StaatJiehe Gewerbearzt, 463 Bochum, Marienplatz 2 -errn Professor ' p.A. Hehoe Pep., of 'Occupational Medicine University of Oincinatti Fernruf 60575 - 79 Postscheckkonto Dortmund 32799 j Cone: Limit values for lead workers; Amsterdam-conference 1968 Lear Mr. Kehoe! We were much astonished at the recommendations made on the Amsterdam-conference in 1968, since at the same time well known specialists had published quite different limit values for leadworkers. Such limit, values were in the "Statement" (Brit. Med. J. I968, 4, 501): ALA CP 20 mg/Liter , 500 yug/Liter On the Amsterdam-conference those values were reduced to the half without detectable motivation: ALA 10 mg/ Liter CP 300 yUg/Liter whereupon the public lead neurosis has been started in 1970 in Germany. fhe Amsterdam limit values for ALA and OP are scarcely more than upper normal limits for industrial workers without known lead exposition: Formal: M + 2s M + 3s mg ALA/l 6,5 8 yug CP/l 200 250 In this point the proposals of Amsterdam seem tojbe a, nonsense in occupational medicine, for two reasons: 1) All work with lead connected with some exposition in the manner of nowadays should be stopned, 2) lead up to 70 yug/100 ml blood was said to be acceptable in Amsterdam. But with lead levels within 50 - 70 yug/loo ml very often occure Ala ~ and CP-concentrations up to yag/l20 mg/l and 800 respectively. That means, the yagAmsterdam relation between 70 Pb/100 ml blood and 10 mg ALA/l urine is not correct. (A reprint is added to see the relation A1A-CP). I would be grateful, if you would stand up for the reasonable " Statement ", you have signed, which contains limit values proved since many ^ears. The Statement agrees fairly well with the old german values, but the new ones lead to a complete confusion. Yours sincerely LL Pi. ftitles t`'i ijeris V_ Iggffl q i^el V(ij itc\ Hi fio KIs 0018376