Document 4EjnN3Q238kX3aBD5dM1dYQj

Monsanto ................ E. S. Tucker - R&D Laboratories - South Second Street OftTl u*jici *t i rmcNct December 11, 1969 AROCLOR - WILDLIFE ,, P. B. Hodges - GO M. W. Farrar - Res R. E. Keller - Res W. R. R1 chard - GO E. P. Wheeler - GO TO : Michael Pierle TSD - W. G. Krummrlch Plant The analysis of all W.G.K. sediment samples so far received has been completed and the results are shown in the following table. All sediments extracted contained heavier EC/GC active materials; however, the retention times and general peak shapes did not exactly match the EC fingerprints of either Aroclor 1254 or 1260. In two cases. OR Log Nos. 77 and 78, significant amounts of the heavier materials were present with respect to the Aroclor 1242 content. These heavier materials are most probably a mixture of Aroclor 1254 and 1260 whose isomer distribution has been altered. OR oq No. W.G.K. Sediment Samples Sample Identification Date Taken Amount Found (Reported as Aroclor 1242) ' J ' 77 Mississippi River 8-25-69 106 ppm / Downstream i 78 Mississippi River 8-25-69 *825 ppm J Monsanto Dock 1/ 79 Mississippi River 8-25-69 *41 .6 ppb ( Upstream r+z' 92 Mississippi River 10-10-69 1.10 ppb^ 1 Upstream 93 .. 94 Mississippi River Monsanto o cK Mississippi River Downstream 10-10-69 10-10-69 4.60 ppm J 3.19 ppm ^ '^60-77' TtitjtL---- E. S. Tucker db i i rv MOMS 09 7260