Document EdevQDNM3E7nDkzZjnJgZ4gE4

JENNAT CORPORATION A SlIBSmiABY OF ONION CARBIDE CORPORATION Quality Emutiion IPotymcU 2043 STEEL DRIVE TUCKER GEORGIA 30084 404 - 939-9327 % '% 'M V/o,' TO: C. H. Greenert J. R. Hazle H. V. Hooper^/ July 2, 1975 RttllVED JUL 0 8 197fc R. N. WHEELER. JR. s, > cc: R. L. Baker H. M. Bartlett J. C. Flanders W. P. Mi Iler M. 0. Robinson P. C. Payne D. H. Reed G. W. Sanders A. E. Stafford R. D. J-ames Subject: Vinyl Chloride Monitoring Program /< C jV*cloct( Gentlemen: Since the new 0SHA regulations became effective on April I, 1975 about 60 ambient air samples have been collected during U-1000 manufacture at Tucker and analyzed for vinyl chloride along with about 30 samples from the Somerset plant. The samples collected at Tucker include personal carbon tube samples (usually over a 15 min. period), gfab samples taken with a 50 cc syringe (mainly trouble shooting), and 8-hr area samples collected in 12-liter aluminized Mylar bags using EMI pulse pumps with an l8sec/2 sec. off/on cycle. All samples received from Somerset have been of the 15 min. carbon tube variety. Analysis of these data suggest the following: 1. During routine operation both plants are in compliance with the 15 min., 5 ppm ceiling standard. 2. The Tucker facility is in compliance with the 8 hr. TWA.I ppm exposure limit but may have difficulty staying under the "action level" of 0.5 ppm 8-hr. TWA. 3. Consecutive monitoring over an .8 hr. period or covering a complete U-1000 production run has not been done at Somerset (to my knowledge) but data collected suggest they are in the same position as we are. 4. At Tucker the highest exposures usually occur during the "blow down" pe riod. r ucc 032767 Obviously, it is easier to comply with the 5 ppm 15 min. standard than the 8 hr. TWA limit of I ppm or the "action level" of 0.5 ppm, especially if the samples are collected during periods other than "blow down". The 8 hr. bag samples collected at Tucker accurately, represent the average vinyl chloride level in that particular area over an 8 hr. period but do not necessarily reflect the personnel exposure during this period, since the bags are usually located where VCI level is expected to be highest and the worker is in and out of this area many times during his shift. Apparently, the only way to accurately determine TWA 8 hr. average exposures is to collect a series of consecutive personal air samples that completely cover the duration of exposure in the 8 hrs. We plan to do this in the future. The attached tables include all of the air samples collected at Tucker and Somerset since the new regulations went into effect April I, 1975. Keep in mi'nd that the "grab" samples were for trouble shooting purposes, do not reflect presonnel exposure, and were often taken where high VCI concentrations were known to exist. During future runs we plan to sample the vent stream and determine how much VCI we are currently releasing to the atmopshere. Very truly yours. John l* Ferrell 9 ucc 032763 Date 5/16 5/21 5/21 5/21 5/28 5/28 5/29 5/29 6/18 6/18 6/18 6/18 6/18 6/19 6/19 6/25 6/25 VINYL CHLORIDE MONITORING - TUCKER 15-min. Personal Exposure Samples Location & Comments ppM VC I Relocation of VCI lines outside Process Bldg. Lead Mechanic wearing fresh air equipment 24.8 Repair of high pressure pump outside pro. bldg. 0.35 Mezzanine area during mono feed < 0.25 Mezzanine area during blow down 0.97 W/0 area pulling monomer <0.25 Floor area during top heat nil Rx 3 Mezzanine area ni| Rx 3 mezzanine & floor 0.26 W/0 area pulling monomer <0.25 Mezzanine & floor area during mono feed <0.25 High pressure pump area - leak - 5 ft. away 0,47 W/0 area pulling monomer 0.26 Mezzanine - initial soap & mono charge - leaking valve 1.2 W/0 area pulling monomer nil Mezzanine during mono feed <0.25 Mezzanine during blow down 0.47- Floor and mezzanine area during blow down 0.30 9 ucc 032769 Da+e 5/16 5/21-8:15 a.m. 5/21-8:15 a.m. 5/21-10:15 a.m. 5/21-10:15 a.m. 5/21-11:15 a.m. 5/21-11:15 a.m. 5/21-1:25 p.m. 5/21-1:25 p.m. 5/21-2:30 p.m. 5/21-2:30 p.m. 5/29-2:18 p.m. 5/29-2:40 p.m. 5/29-2:40 p.m. 5/29-4:00 p.m. 5/29-4:00 p.m. 6/18-10:15 a.m. 6/18-11:10 a.m. 6/18-11:40 a.m. 6/18-12:15 p.m. 6/18-12:30 p.m. 6/18-8:30 p.m. 6/18-10:00 p.m. 6/18-10:15 p.m. 6/18-10:35 p.m. 6/19-12:45 p.m. 6/19-1:40 p.m. 6/19-1:45 p.m. 6/19-2:05 p.m. 6/24-1:00 p.m. 6/25--1:20 p.m. 6/25-1:20 p.m. 6/25-2:00 p.m. VINYL CHLORIDE MONITORING - TUCKER Grab (syringe) samples Location & Comments PPM VC I Reclocating VCI Monomer lines 4.0 Walking thru process bldg, following high press pump leak 0.25 1.5 ft. from H. P. pump packing 15.1 Inside H. P. pump case I in, from packing nut - leak 108 H. P. pump area 5 ft. away 0.4 . Inside H. P. pump case 1 in from packing nut 276 H. P. pump area 5 ft, away 1.4 Inside pump case 1 in. from packing 668 H. P. pump area 5 ft. away 0.5 Inside pump case, etc. 776 H. P. pump area 5 ft, away 0.4 Floor area between BT 3 & CT 3 0.92 Inside H. P. pump case 92.5 H. P. pump area 0.76 #3 Soap pump 5 in. from packing - leak 12.3 # 3 Soap pump 5 ft. away 0.8 W/0 area 1 in,from mono meter - leak suspected 4.23 Mezzanine between Rx 3 & CT 3 C. 0.25 Inside H. P. pump case 60.7 Mezzanine Rx 3 area < 0.25 H. P. pump area. 0.29 Between CT 3 & BT 3 floor during blow down 7.9 Between CT 3 & BT. 3 floor after blow down 2.8 Inside H.P. pump case 5.5 Inside H. P. pump case 8.2 Inside H. P. pump case 0.28 Mezzanine Rx 3 Area ni I Inside H. P. pump case 0.88 W/0 area -<0.25 Inside product storage tank-empty-contained U-1000 ni I Mezzanine CT 3 area during blow down 0.74 Mezzanine BT 3 5 in. from manhead cover - blow down 0.74 Floor around dump valve Rx 3 0.27 HOC 032770 VINYL CHLORIDE MONITORING - TUCKER 8 hr. Bag Samples Date 5/29 6/18 6/18 ' Location & Comments On top of CT 3 - mezzanine On top of CT 3 Mezzanine Rx 3 area 6/25 On top of CT 3 9:00 a.-5:00 p. 6/25 . W/0 area - floor - 25 ft. from BT 3 9:00 a. - 5:00 p. 6/25 On top of CT 3 5:00 p. - I:00 a. 6/25 W/0 area, etc. 5:00 p. - I:00 a. PPM VC I 0.78 0.40 0.36 0.57 1.25 0.49 0.26 f ucc 032771 Date 4/3 4/3 4/7 4/8 4/7 4/8 5/15 5/15 5/15 5/15 5/15 5/19 5/19 5/19 5/19 5/19 5/19 5/19 5/28 5/28 5/28 5/28 6/9 6/9 6/9 6/9 VINYL CHLORIDE MONITORING - SOMERSET 15-min. Carbon Tube Samples Location & Comments VCI disconnect -10 ft upwind Clhr. sample) VCI disconnect 10 ft downwind (1 hr. sample) Rx 1 - Rx 3 area Rx 3 area Outside process bldg. Rx 3 area Screening area - 5131 Screening area - 5131 Screening 5131 Screening 5131 Screening 5131 Rx 3 area Rx 1 & Rx 2 area Rx 3 floor Rx 3 area Rx 1 & Rx 2 area Floor area W/0 area Rx 1 & Rx 2 area W/O area Rx 3 Area Rx 1 4 Rx 2 area Rx 3 area Mezzanine General floor * Rx 1 & Rx 2 area PPm VCI 120.6 3.4 1.09 0.55 0.25 0.85 0.28 0.25 0.25 0.25 ni 1 0.25 0.25 0.25 0.49 nil ' 0.25 0.25 0.43 0.88 0.68 0.98 2.7 1.6 0.24 nf 1 UCC G32T72 VINYL CHLORIDE MONITORING. - SOMERSET 15 - mil. Carbon Tube Samples DaTe 5/10 5/10 6/10 6/10 Location <5, Comments Rx 3 Area Rx I & Rx 2 area W/0 area General floor & monomer feed area pp^ q yj q 24 q 1,14 j t ucc 032773