Document 32Oee66Vk7oLLR9g5Zb1gdba

bcc: V. R. Richard Tom Ford H. S. Bergen J. S. Sprlnggate March 24, 1969 Mr. Harry Chatfleld Los Angelea County Air Pollution Control District 434 South San Pedro Street Loa Angelas, California 90013 Pear Nr. Chatfleld: Enclosed is a copy of the physical properties of our Aroclor ooeipounds Z promised you by phone. We have added the oral and kin absorption toxicity to the bottom of this list to give you some Idea of the relative toxicity of these compounds. Tou will notice that they are not particularly toxic by oral ingestion or skin absorption. Zn addition, X have enolosed a copy of a paper that waa printed In the American Xnduatrlal Hygiene Association quarterly In June, 1936. This paper ' . discusses the vapor toxicity of Aroclor 1242 and Aroclor 125*1. As X told you on the phone the 12 prefix In this case means biphenyl and the 42 or 51* suffix In this case represents end 5*>Jt chlorine by weight, respectively. Ve at Monsanto cannot understand the origin of the materials reported In the recent newspaper articles on the West Coset. These compounds are utilised generally In enclosed system and very little would normally be expected either In the sir or In the liquid discharges from a using Industry. If we can provide you with any additional data we would be glad to do so. Sincerely, JWiojs Enclosures Jack T. Serrett Manager, Pollution Abatement and Industrial Hygiene MUN5 090790