Document 3QzVL4zRM9bpebEQz0nbykg6D

Interoffice Communication To G. A. O'Brien From R. H. Gerlach Data July 12, 1974 subject VCM Ship Loading Data (co, 3CO) Attached are two reports by Paul Fetzer summarizing the results of the ambient air sampling conducted during the loading of the Hoegh Shield on June 13, 14 and 15 and the Irene on June 21, 22 and 23. Heel and finished cargo sampling still are the main problem areas, and we are continuing to try to tighten up the system. The dock vent recovery unit was not operated during the Irene loading. The ship's refrigeration unit and vent were used instead. We have contacted the ship owners and re quested that piping modifications be made to their ships which will permit operation of their vent recovery in series with ours. R. H. Gerlach is Enc CC + enc: REl-LNV-DVP VVC 000002380 Interoffice Communication To R. H. Gerlach From P. L. Fetzer Date July 3, 1974 Subject Ship Loading Data - Irene - June 21, 22, and 23, 1974 The intensive sampling program used on the two previous ships. Alpha Gas and Hoegh Shield, was reduced. Only one Century instrument was used to gather data throughout the loading. Charcoal dosimeter data was obtained for each operational step throughout the loading sequence. Three partial downwind grids were taken during the loading operation. This program re quired two men per 12-hour shift instead of four and does not sacrifice any pertinent information. On future ship loadings I would recommend this re duced sampling operation for monitoring purposes. All the analytical data pertaining to the loading of the Irene are shown in the attached tables. The main source of vinyl emission during the loading operation, excluding the vent stack, appears to be during sampling. Five additional 2-liter sample cylinders have been ordered with a 2-week delivery. Additional valves have been ordered to replace those on the one liter sample cylinders. These items should be available for the next ship loading around July 15. is Enc VVC 000002381 SUMMARY OF RESULTS Ireme Loading - June 22 Loading Line Flange Removal: 23 Heel Samples: Hydroquinone Addition: Ship Loadings: Finish Cargo Sampling: Century reading went to 50 ppm momentarily then dropped to background reading of 7. The personnel data from the charcoal dosimeter only showed 3.03 ppm TWA for 0.20 hr. Century readings were high, up to 1,000 ppm. Sample cylinders had leaking valves and the eductor system was again back pressured. To obtain the heel samples, the loading was shut down. The sampling system also leaked badly. The charcoal dosimeter result for the operation was 69.1 ppm VCM. No change from the background reading on the Century instrument was observed during the hydroquinone addition operation. However, a 10" valve at the hydroquinone station leaked very badly around the packing which was pulled down tight. The charcoal dosimeter result showed 10.7 ppm VCM during the entire hydroquinone addition procedure. Three partial grids were completed during the ship loading (Table II). The vent recovery unit was hot operated during the ship loading as the ship's refrigeration and vent system was used. Century readings were generally below 40 ppm. Occasionally the readings would reach 70 ppm; once reaching 1,700 ppm. Most of these higher readings were near the base of the dock and hydro quinone station. Roadway samples from both the Century and glass bomb samples showed VCM at grid points 36 through 44. Charcoal dosimeter results for the dockman near the dock shack were 6.4, 3.3, and 1.8 ppm VCM. Century readings ranged between 30 and 700 ppm mainly due to leaking valves. A new type of bomb valve has been ordered for replacement. The vent vacuum hose connection to the sampling system leaded several times during the sampling operation VVC 000002382 Page 2 Loading and Vent Line Flange Insertion: Century readings showed most readings below 40 ppm. Column made operation showed immediately after hose disconnect showed an estimated 52 ppm VCM. VVC 000002383 TABLE I PERSONNEL EXPOSURE IRENE LOADING - JUNE 21, 22, AND 23, 1974 Job Unblinding Hose Flanges VCM Heel Samples Hydroquinone Addition Ship Loading Finish Cargo Sampling Hose Flange B1inding Position Dockman Shift Foreman Dockman Dockman (b) Dockman (b) Dockman (b) Manufacturing Chemist Dockman Dockman Time Interval Hr. 0.20 2.75 1.50 5.33 3.83 5.68 2.55 0.267 0.267 TWA - ppm VCM From Dosimeters 3.03 69.11 10.71 6.43 3.30 1.80 5.55(c> 5.73 7.45 (a) All employees protected with fresh air equipment. (b) Dock AY'ta (c) Not protected with fresh air mask. VVC 000002394 TABLE III GLASS BOMB SAMPLES FOR PARTICULAR JOBS Job Sample of vent line going to our vent stack 20* North of guard shack at gate Finish samples #2 Starboard ppm VCM 96,806 1.8 8.9 Wc 0002335 Grid Point 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 -32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 TABLE II GRID RESULTS SEE ATTACHED PLOT FOR GRID POINT LOCATIONS Set I THC Bomb 1700 1043 10 9 9 Set II THC Bomb 15 15 20-33 13-30 25 30-70 15 15-20 14 12 278 9 2.2 14 15 12 11 11 20-70 13-17 10 9 10 9 35.1 39.9 5.4 10 6.1 11 11 18-30 19.6 16.2 9 15-22 12-20 10-22 4.2 7.5 3.7 8.5 14 3.5 Set III THC Bomb 13 30-40 30 30 30 28 18 15 18 12.3 15 15 10 27 13 27.7 0000023*6 18 5.8 Interoffice Communication To R. H. Gerlach From P. L. Fetzer Date July 3, 1974 subject VCM Ship Loading Data - Hoegh Shield 6-13, 14-1974 The same comprehensive sampling program used on the Alpha Gas 5-31, 6-1 was repeated on the Hoegh Shield Loading. Additional man power to sustain the program was supplied by the Lake Charles Refinery and Ponca City R & D, one man from each. This loading was monitored randomly, eight times, by the OSHA inspector, Mr. Steve Herrin. Concurrent charcoal dosimeters samplings were made for seven of the eight samples. Our dosimeter results are shown in Table IV and chrono -logically in Table I. All analytical data has been compiled excluding comparative Sippin pump samples. Method development work is underway and these samples may be completed by the end of the month. A summary of the entire ship loading operation is attached with all pertinent data. Improvement in the hydroquinone addition operation through the recent apparatus modification essentially eliminates this operation as an vinyl emission source. Improvement was also noted in the vinyl chloride readings while using the two liter sample cylinders. Five additional cylinders will be ordered. These new sample cylinders will reduce both sampling time and potential personnel exposure. Comparison of results from the previous loading of the Hoegh Shield (May 2, 1974) shows dramatic improvement in all areas of the loading operation. Chief Chemist bw vve <300002387 Removing flanges Heel Samples Hydroguinone Addition Ship Loading Finish Cargo Sampling SUMMARY OF RESULTS Hoegh Shield Loading 6-13, 14-1974 Readings in excess of 1% were obtain when attempting to remove the flange in the liquid loading line. Liquid vinyl chloride had remained in the spool piece even though the system had been pressured and evacuated ten times. The liquid was finally drained through the vent line on the bottom of the spool piece (This procedure should be adopted as a first step on the next ship). Repeating the purging steps kept the vinyl readings by the Century instruments below 50 ppm. Personnel dosimeter results were 73.5, 55.2 and 28.1. These high values are due to the liquid vinyl chloride that remained in the spool piece after the initial purging operations were completed. Century readings varied between 18 to 1000 ppm. The higher readings were obtained near the vent hose connection on the sampling apparatus. Normally, the readings remained low in the breathing zones. Glass bomb sample data, Table III, and charcoal dosimeter data verifies the findings. The modified hydroquinone addition system worked quite well. Century readings were below 35 ppm during the entire procedure. Glass bomb sample data. Table III, verified these readings. Packing glands on the block valves in the hydroquinone addition area leaked slight! Personnel dosimeter data also showed low results during the hydroquinone addition operation. Table I. Both Century instruments were used to monitor the dock area during loading operations. Six area grids profiles were taken (Table II) periodically throughout the loading. During loading, the wind remained quite calm. Ocassionally, high readinqs were obtained for a few seconds at grid points 2 thru 9. This may account for the higher personnel disometer results (Table I) obtained during the loading of this ship as compared to previous ship (Alpha Gas dosimeter results during loading were below 2.0 ppm). Using the new two liter sample bomb resulted in only background reading, 14 ppm, on Century insturment. Glass bomb sample showed 3 ppm. Generally low readings were obtained while disconnecting the bombs. Once vvc 000002383 Loading Hose Disconnector and Flange Insertion however, the eductor apparently was back pressure from the stack and Century readings increased to 300 ppm while disconnecting the sample cylinder. Gage taps on the ship were leaking and resulted in high readings, 100 ppm, several feet down wind. Glass bomb sampling also showed the vinyl chloride (32 ppm). Century readings ranged to 710 ppm in the breathing zone while disconnecting the vapor line ship connection Glass bomb samoles showed relatively high results on vapor line disconnecting (101,205). Century readings taken while disconnecting the liquid loading lines remained below 30 ppm. The lower readings were verifie by glass bomb sample analyses (8, 6 ppm). vvc 000002389 JOB Removing Flanges Heel Sampling Hydroquinone Addition Loading Finish Sampling Hose Flange Blinding TABLE I Personnel Exposure - Hoegh Shield - June 13, 14, 1974 POSITION Dockman Dockman Dockman Chief Chemist Shift Foreman Manufacturing Chemist Shift Foreman TIME INTERVAL (hr) .416 .416 .416 .334 .867 .167 .25 TWA - ppm VCM from Dos .48(1 73.46 55.21 28.84( 3.67 .9 10.81 Dockman Manufacturing Chemist Dockman (d) Dockman (d) Dockman (d) Dockman (e) Dockman (d) Dockman (e) Dockman (e) Dockman (d) Guard(o) Dockman (f) & (o) Dockman (e) & (o) Dockman (d) Dockman (e) Dockman (e) Dockman (d) Dockman (d) Dockman (e) Dockman (f) & (o) Dockman (e) & (o) Dockman (d) & (o) Dockman (e) * .833 .167 4.00 4.85 4.22 4.33 4.25 2.50 4.22 4.00 .334 .334 .334 4.08 3.77 3.92 3.87 5.30 3.07 .334 .334 .334 .917 1.98 3.13 .18 .05 .69 9.47 8.2 14.81 7.87 2.83 1.44 3.00 8.28 7.64 12.58 14.90 6.19 .83 4.34 5.49 11.55 1.87 9.01 Shift Foreman Dockman Dockman dockman (o) 1.10 2.12 1.13 .423 (a) Personnel protected with fresh air mask (b) Dosimeter pump not turned on (c) Not wearing fresh air mask (d) Dockhand working in dock shack (e) Dockhand working in vent recovery unit (f) Dockhand on #2 dock (o) Concurrent OSHA Sampling 7.75 2.39 1.11 4.11 VVc 000002390 TABLE II GRID RESULTS (See attached plot for Grid point locations) Point No on Grid 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 Set I 6-13-74 THC Bomb(a) Set II 6-14-74 THC Bomb(a) 11 n 11 9 9 10 4.2 9 9 9 8 8 8 7 10 8 8 8 8 12 3.97 8 8 8 8 8 8 4,2 8 8 8 8 - - 7 7 7 7 2.8 7 7 7 7 7 7 7 7 clear 85-90 S-SW (5-10) 13 13 16 15 15 50-60 14 14 17 16 14 14 14 15 20 18 20 18 15 14 13 30-40 22 10 2 2 ' 14 4 7 3 5-30 5 14 14 13 15 4 6 4 Partly cloudy 65--70Variable (W NE) 0-5 Set III 6-14-74 THC Bomb(a) 30 3.7 16 19 50-70 27 25 6 35-40 9 50-100 7 20-50 15 16 18 25 13 40 4 15 16 15 15 17 18 Set IV 6-14-74 THC Bomb(a) 9 9 9 9 8 20 20-30 12 8 7 8 8 8 15 10 9 9 8 8 7 8 8 8 8 '8 7 8 8 7 7 8 Tr 411 8 7 8 000002391 vvc 15 3 clear 65-70 N-NE 0-5 9 cl ear 65-70 N-NE 0-5 Set V 6-14-74 THC Bomb(a) . 12 10 20-500 675 10-100 10 10-50 Nil 8 10 10 10 10 10 8 8 8 8-10 12 8 10 8 8 8 8 8 8 8 7 _ Tr Tr 7 8 8 8 8-10 8-10 8 8 8 8 8 8 Tr clear 85-90 N-NE 0-5 SET VI 6-14-74 THC Bomb(a) 1 15 13 2 15 3 13 8 4 12 5 13 6 35 7 7 15 8 15 9 10 11 12 13 14 30 15 18 16 20 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 18 36 100 37 38 39 30-100 38 40 41 12 42 10 14 43 44 45 46 15 clear 70-75 S SW 0-5 TABLE II Continued Wc 0002392 (a) Glass bomb samples taken and analyzed in plant lab for ppm VCM. TABLE III Results of Glass Bomb Samples Taken During Execution of Particular Jobs HEEL SAMPLING 12 19 11 8 HYDROOUINONE ADDITION 8 12 34 FINISH SAMPLE 2 32 3 INSTALLING LOADING LINE BLINDS 101a 8 6 205a (a) vapor vent line vvc 000002393 DATE 6-14-74 6-14-74 6-14-74 6-14-74 6-14-74 6-14-74 6-14-74 NAME Busby, E. M. Davenport, D. Johnson, A. J., Jr. Johnson, A. J., Jr. Brester, B. R. Pousson, L. B. Coffman, A. B. TABLE IV OSHA DATA LOCATION Guard Shack Dock #2 Vent Recovery Dock #2 Vent Recovery Dock Area Flange Disconnect TIME(Hr) .333 .334 .334 .334 .334 .334 .423 VCM(ppm) 1.44 3.00 8.28 5.49 11.55 1.87 4.11 VVC 000002394 Interoffice Communication To All VCM Plant Employees From c. E. Gremillion Daw July 10, 1974 subjact VCM Air Sampling CO 3CO Continuation of the VCM Air Sampling using the Personal Monitoring Devices will resume. The schedule for July, 1974 is attached. The schedule has been prepared with the name and/or the occupation of the employee to be monitored. Each employee should review the schedule and report to the lab to wear the personnel monitors on the date, time and shift assigned. You will not be contacted. The same procedures specified in the eariler personnel monitor wearing in structions shall still apply. Please direct any questions or comments to the undersigned. C. t. taperrn 11 ion Safety Director bw Distribution^ Supervisors Bulletin Boards VVC 000002397