Document 1Qw3neknzbKo6jov9Yy1YxVDd

Monsanto ............location, Dale J. Schilllnger - W. G. Krummrlch Plant OATS May 11, 1972 P. E. Helsler SAFETY REVIEW OF PROPOSED Clarrle Buckley CHANGES IN THE HC1 DISTRIBUTION SYSTEM__________________ TO Bob Fields Greg Dimkoff Woody Ban Art Leisy Sam McWilliams Ed Stewart Ron Sorrell Bill Engmann Bob Helder Bob McCutchan Dallas Armstrong Fred Elliott The present HC1 distribution system Is not acceptable because Aroclors are sewered with the HC1 gas. Several schemes were proposed. The method agreed upon would separate producing systems. A dual control system will be used to keep 246 gas from being sewered In Dept. 236. The valves will operate off of differential pressure to prevent back flow of gas. Mr. Leisy will designate the Supervisor who will be respon sible for the operation of the control scheme. The Independent control loops will be tested on a frequency basis. A written schedule of test Intervals and verifica tion that the work has been performed will be kept by the Supervisor who has responsibility for the system. The control system In Dept. 246 was al30 reviewed. No changes were recommended In the proposed control scheme. / ghw Dale J. Schilllnger MQNS 099431