Document dYvBGpNO9bEN8XXO1MX85QGN0

INTERNAL CORRESPONDENCE UC 149- 2 CHEMICALS JTnD PLASTICS TO (NAME) COMPANY LOCATION Mr. R. L. Frantz Texas City Plant COPY TO Mr. D. E. Deese Mr. M. E. Eisenhour Mr. R. P. Keefe Mr. G. T. Pyle Mr. R. W. Ses ler Mr. K. L. Topham date P. O. BOX 471, TEXAS CITY, TEXAS 77590 February 20, 1975 subject VFA Analysis For VC1 At The Suspension/Non-Solvent Unit The VC1 data from the VFA instrument in the Suspension/Non-SoLvent Unit for January is attached. Table I shows a summary of the number of high readings for the period since the instrument was installed through January, Basically, the data shows that initially the number of high readings were decreasing but appears to have been relatively stable for the November-January period. Table II shows the data by location for January. The current problem areas (based on the critical few-locations with 40 readings exceeding 25 ppm) are: 1. Tank Area 4, Ground Level - The high readings were primarily due to leaking pump seals on the VCM tanks in Tank Area 4. 2. The Off-Gas Recovery System - This system continued to dump seal water to the sewer because of inadequate control of the liquid level in the seal water tank. This is scheduled to be remedied by increasing the size of the motor valve and pipe from j" to 1" by February 15. A mechanical seal was installed on the Nash Hytor compressor during January which should also decrease leakage. 3. Second Level, East line - Several causes were involved - leaking valves, plugged lines from the autoclaves, and vents from other areas of the Unit. UCC 094510 Mr. R. L. Frantz -2- February 20, 1975 4. The Compressor Room in Bldg. 119 - Although steps have been taken to eliminate leakage, the compressors still constitute a problem. However, entry of personnel into the room is seldom required. 5. Bldg. 119, S. Side, N.W. of Strip. Tank - Reasons listed were No. 2 blowdown tank to pad, recovered VC1 pump seal leaking, and changing out pump in Tank Area 4. Table III gives the number of readings above 2 5 ppm for each day in January by point number. This data shows particular days when one point may be the major contributor for that day. FLJ/st Attachments F. L. Johnson UCC 094511 TABLE I VFA ANALYSIS FOR VC1 AVERAGE /DAY*1* June 22 - July 21 Aug. 19 - Sept. 5 September October November ^ December January Number of Points Exceeding 50 Exceeding 25 Exceeding 10 19 11 8 5 12 18 74 18 64 16 i 2~ ^ Out of 720/day, until Oct, 5 when it changed to 684/day. Changed sensitivity of VFA on Nov. 4 from 100 to 25 ppm, full scale. ucc 094512 TABLE II DATA FROM VFA ANALYZER FOR JANUARY Point 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 Location No. of Readings Exceeding 2 5 ppm % of Readings (tim Less than 25 ppm Control Room B. 174 Downstairs, East line Downstairs, North line Downstairs, South line Second level, East line Second level. North Line Second level, South line N. line, B-119, 1st level, W. end B-127, Second Level B-119, N. side, Second level, center B-119, N. side, 3rd level, center Off-gas rec. facilities B-119, compressor room B-119, maint. room B-119, S. side, NW of strip, tank VCl unloading facilities Tank Area 4, ground Level Pilot Plant Unit Control room, B-120 1 25 40 16 46 24 9 12 14 7 14 54 44 41 44 30 55 8 4 99. 9 98 96 99 96 98 99 99 99 99 99 96 96 96 96 97 95 98 99.6 Average/day 16 UCC 094513 UCC 094514