Document 4aJD79Q1EbB3qGyryKvLGy3o1

Monsanto mo ,h,m. Lo^oN, Wllllam H. Hunt - Medical "M* ercCNCL April 29, 1970 Aroclors - 3 Generation Rat Reproduction and Pish Toxicity "ro : R.E. Kelly, M.D./E.P* Wheeler A visit to Industrial Bio-Test laboratories, Inc., April 28, 1970 revealed the following progress to date of this study: The first litters of F*>were OK for 1242. However, the females . _ for PgB (second time around) failed to become pregnant at the ('*-e'"rr ft/tka** ]_00 ppm level. The other two levelB were OK. Only 1 female J had pups which are now 12 days old. As a matter of fact only . I 2 or 3 of the 16 females are pregnant and they haventt delivered as yet. It is planned to remate these femaleB for 1 week to see what will develop. Regarding the fish toxicity Btudles (catfish and bluegills) the time scheduled will be 2 to 3 `weeks behind because doses which ( were believed to be OK produced 100^ kill. __ At levels of 1 to 10 ppm for both 1242 and 1254, for 50 fish per level, all died. For 1260 at levels of 10 and 100 ppm there were a few survivors ' at 10 but all were dead at 100 ppm. ~~ < I 1 Thu F* T-L. zOrU. Wiy w A* ^ 7 A . 7^. /C }Off. }XU&- *4 j, m y jl aa. F/ 4" f-S v A ^* fj. 0 + ft, B William H. Hunt, Ph.D, jUttaut. f3 N.0 MV. II.| TOWOLDMON0046104 WATER PCB-00037081