Document QXGD7Vm44Jx8qdpk742948pp7

ox.com/5ecure/data2/Lightioot smith/images ;4446.CPC?strict:seale=fitwidth:oage=ldbid=smitbdbid=srrPags 2 of 2s C 0 M.P,,A_N_Y iqil.D.E.LT_I A L A T T 0 R n'k Y--C L I E N T PRIVILEGE Date: October 15, 19^9 Subject: REPORT OF AROCILR 11 AD HOC" COMMITTEE "(Second Draft) To: Rodney Harris, Jr. Director, Law Department M. N. Farrar P. B. Hodges, Secretary E. V. J ohn w. R. Richard E. P. Wheeler, Chairman Copy S. Bergen, Jr. //2--J. E. SprIngate //3--M. N. Farrar B. Hodges //3--E. V. John //6-W. R. Richard //7-W. C. Robinson //8--W. A. Kuhn //9--T. K. Smith f/10-J. Mason jffll-H. L. Minckler Origlna1-E. P. Wheeler V DSW164905 TOWOLDMON0046361 WATER_PCB-00037338 i-^^auiPi2dSS^SSSSgyjSi[^^=jjbMg9t-isrDi>h/ifn3ges-''?4/54446.CPC?stri:t:scale=^itwig!th:Dage=jdhid=sfTiithdbid=snPagg " o? 1 2. TOXICOLOGICAL ASPECTS (Continued) F. Summary of Toxicity Considerations a. The PCB 1 s are ''moderately" toxic to man, A probable safe level for Aroclor 12p4 and, 1260 in the diet will be something Jess than one ~ part per million. b. Although only "moderately" or "slightly" toxic to adult birds and fish on the basis of acute exposure, the "safe long term" or "chronic dose" is less than 100 ppm insofar as reproduction is concerned. c. In the case of shrimp, the "safe" or no effect" level for Aroclor 12t>4 is less than 5 parts per bill3 on. It thus appears that, -while wc may be able to show some kind of reasonable numbers for "safe levels" of Aroclors 1254 and 1260 (and other lower chlor inated biphenyls)in some species, there are other species of life in the ecosystem where a zero to 6 parts per billion limit for Aroclor 12^1 and 1260 . arfd"poslfxirfy~othen more highly chlorinated biphenyls) I will be the tolerance level. -5- V DSW 164911 i/i, a JOWoldMON0046362 WATER_PCB-00037339