Document BmOG4ogQ34Dan6R8bRgr1qDw

LOUISIANA DIVISION INDUSTRIAL HYGIENE REPORT AN OPERATING UNIT OF THE DOW CHEMICAL COMPANY VINYL II Department Title: LAD-Vinyl II - 93.01 File Number 06/09/93 ; Date Evaluation of Employee's Exposure to Noise at the Louisiana Division Vinyl II Plant, Plaquemine, Louisiana during April 1992 - March 1993. During April 1992 - March 1993, personnel time weighted average (TWA) and/or excursion exposures to Noise were evaluated. The areas of the plant with the highest noise levels are the K-320 propylene compressor area and lube oil skid, K-350 block air compressor area, K-400 blower area, various control stations, and the fin fan exchangers. A summary of the recommendations are: Develop a strategy with Plant Engineering and Industrial Hygiene to abate (where feasible) the major noise sources. Update the block written hearing conservation program to specify appropriate hearing protection which will attenuate noise areas to acceptable levels. Review the Safe Operating Procedures to include wearing of the proper hearing protection to prevent exposure to high noise from certain stationary equipment. Emphasize during training that certain stationary machinery creates most of the noise rather than certain activities (hand tools, air hoses, and portable equipment, etc.) to employees. (Continued on Page 2) DISTRIBUTION; Tmiisiana Division: Midland: K. Hasenbeck* G. Kusch G. Meier A. Sandow* J. Allen B-2306 B-2303 B-3502W B-3701 B-3301W * Cover Sheets Only C. Holmes* F. Gascon B. Bozeman C. Messelt T. Leigh* B-3302P B-6601 B-6601 B-6601 B-1601 S. Dombrowski RESTRICTED FOR USE WITHIN DOW 1 DO A 114064 CONFI DfTNT T Al SUMMARY (cont'd) Personal audio dosimetry measurements of employee exposure to noise were conducted for each job assignment Results expressed as the allowable % daily dose corrected to full shift, are listed below; Ranking of Job Assignment Number of % Dose Range Average % Dose Full Shift Samples (Adjusted-Full Shift)* (Adjusted-Full Shift)* (Hours.) 1 OS / EDC-Ecology 2 OS / Vinyl Area 3 SOS / Vac. Relief 3 67-94 3 67-87 1 51 81 12 74 12 51 12 4 Pipefitter/Welder 4 22-65 49 8 5 Insulator 5 32-68 6 OS / Lab Tech. 6 23-57 6 Laborer 4 24-52 7 Electrician * 4 5-87 8 SOS / Permit Writer 3 10-35 9 OS / Load. Oper. 3 1-36 10 Shift Supv. (Days) 2 13-20 48 8 42 12 42 8 40 8 24 8 21 12 16 12 10 Material Controller 10 OS / Env-IH Contact 1 1 16 16 16 8 16 8 11 Instrument 4 7-23 14 8 12 Analyzers 13 SOS / Control Board 14 Maint. Supv. 2 4 1 5-18 8-12 10 12 8 11 12 10 8 15 Sr. Lab Specialist 1 9 98 16 Prod. Supv. 17 C. A. T. 18 Engineer 18 SOS / Env-IH Contact 19 Office Professional 20 SOS / Safety & Train. 1 1 3 1 1 1 8 7 3-6 4 1 0 88 78 48 48 18 08 * Highly variable because of the nature of job activities. a These are potential noise exposures because Vinyl II has a policy requiring hearing protection to be worn in all operating areas of the plant There is variability in noise exposure from day to day depending on job assignment, therefore everyone participates in the hearing conservation program. The OSHA Standard 29 CFR 1910.95 requires that any individual exceeding a dose of 50% must participate in a hearing conservation program including annual audiogram, required annual training and mandatory hearing protection. RESTRICTED FOR USE WITHIN DOW 2 DO A 11.4 065 CONFIDFNTT At... PURPOSE To provide a safe and healthful environment for the Vinyl II Plant personnel, a program to evaluate employee's exposure to noise was conducted in April 1992 - March 1993. The following report addresses work performed on the Hearing Conservation phase of the Industrial Hygiene program including recommendations. CONCLUSIONS 1. The results of employee full shift average noise exposures for each job assignment monitored in this report are found in the table in the SUMMARY section. The results are in descending % dose order. From the ranking in the SUMMARY Table it should be noted that: a. There is variability in noise exposure from day to day depending on job assignment, therefore everyone participates in the hearing conservation program. The OSHA Standard 29 CFR 1910.95 requires that any individual exceeding a dose of 50% must participate in a hearing conservation program including annual audiogram, required annual training and mandatory hearing protection. b. There are job assignments that exceed 85 dBA TWA or 50% of the allowable daily dose. c. These are potential noise exposures because all employees wear hearing protection in posted areas with noise levels greater than 90 dBA. 2. The following table lists the highest noise levels in the block. Figure 1, Vinyl II Area Noise Survey on page 19 shows the areas which are greater than 90 dBA. AREA Analyzer House #9 (AX-4422-ambient air monitors) K-350 Compressor Area (dryers, vents(105). Filters) K-320 Propylene Compressor Area & Lube Oil Skid K-400 Hoffman Blower Let Down Stations by C140 Ethylene Control Valve Feeding Station(R201 & R202 Oxy Reactors) Fin Fan Exchangers Fuel Gas Feed Control Stations to Furnaces (Furnace Area) E120 & E121 Propylene Control Stations P252C (EDC Pump) Oxygen Control Valves (R201 & R202 Oxy Reactors) K215 & K216 Oxy Recycle Compressor P220B near T220 P261A (EDC Pump) P470B (Ground Water Recovery Pump) P340 (Cooling Tower Water Pump) SOUND LEVEL dBA 107 92 - 105 93 - 103 102 101 97- 101 84- 100 95-97 96 95-97 92-95 94 90-94 93 92 92 3. The entire block is a Hearing Protection Required Area. There are signs posted at the block entrance as well as the control room, shop, and lab doors which lead into the process areas. RESTRICTED FOR USE WITHIN DOW 3 DO A 114060 CONFTDFNTTAl RECOMMENDATIONS Develop a strategy with Plant Engineering and the Industrial Hygiene Department to abate (where feasible) the major noise sources. Review and update the written hearing conservation program to reflect the data from this report and to specify hearing protection which will attenuate to appropriate levels and provide protection for the employee. Review the Safe Operating Procedures to include appropriate hearing protection where employees can be potentially exposed to high noise from hand tools, portable equipment and certain activities such as sandblasting, water blasting, arc gouging inside of vessels, bleeding nitrogen padded tank cars to atmosphere, etc. Post signs according to the recently surveyed areas and update the signs for high noise areas in the block (areas where noise levels are ^ 90 dBA and areas where noise levels are > 105 dBA ). Clearly define areas where double hearing protection is needed. RESTRICTED FOR USE WITHIN DOW 4 -\ A0&7 DO A EVALUATION CRITERIA Industrial Hygiene monitoring is performed to determine actual and potential exposure levels both as daily time-weighted averages (TWA) and peak or short-term excursion exposures. The results of personal monitoring are compared with recommended exposure guidelines determined by Dow or independent agencies to be the most appropriate guidelines for a healthy work environment. The guidelines used are at least as stringent and in many cases are more stringent, than the Occupational Safety and Health Administration (OSHA) Permissible Exposure Levels (PEL's). The guidelines are developed using toxicology, epidemiology and industry experience. They represent airborne concentrations of substances to which nearly all employees may be repeatedly exposed throughout a working lifetime without adverse effects. The exposure guidelines for the physical agents monitored in April 1992 - March 1993 at the Vinyl II Plant are outlined below. EXPOSURE GUIDELINE Physical AgentTWA (1)Excursion (2)Source (3)Ref. (5) T.I.M.E. Dow Registry Noise 85 dBA (4) 90 dBA, C (4) Dow/OSHA DR-8000-1032 1. TWA - 8-Hour time weighted average Exposure Guideline. 2. Excursion - Short-term Exposure Guidelines. 3. Source - Dow Industrial Hygiene Guideline. OSHA - Permissible Exposure Limit. 4. See Noise Section (C-ceiling level which should not be exceeded at any time). 5. (T.I.M.E. is a Dow internal hazard data system in which informational sheets are obtained covering Toxicology, Industrial Hygiene, Medical and Environmental elements). Noise The current Dow exposure guideline for noise is a 90 dBA ceiling. In addition, the Hearing Conservation Amendment document (29 CFR 1910.95) issued by OSHA stated that the 8-hour TWA noise exposures should not exceed 90 decibels as measured on the A-scale [dBA] of a sound pressure level meter at the slow response setting. A TWA exposure of 85 dBA (50% of the allowable daily dose) or more requires participation in a hearing conservation program. Areas that exceed the 90 dBA ceiling are posted with signs and mandatory hearing protection is required. For simplification, a 100% dose is the maximum allowable dose for the workday regardless if it is an 8 or 12-hour shift. RESTRICTED FOR USE WITHIN DOW 5 DO A 114068 CONFIDENTIAL Sampling and Analytical Methods Personal Noise dose measurements were taken using Quest M-27 Noise Logging Dosimeter, each set at 80 dBA threshold, 90 dBA criterion level and a 5 dBA doubling rate. Area Sound level measurements were taken with a Bruel and Kjaer sound level meter, type 2205. Instruments were calibrated before and after each survey with a Quest CA-12 calibrator and a sound level calibrator Type 4230. RESULTS AND DISCUSSION Vinyl II has a policy requiring hearing protection to be worn in all operating areas of the plant; therefore, the following data reflects potential exposures. Operations Specialist (OS) / EDC-Ecology The average dose for the OS working in the EDC/Ecology area was 81% as seen in Table 1A. Table IB shows that most of the noise in the > 90 dBA range, on 4/25 and 10/27/92, was in the range for Single Hearing Protection (91 - 105 dBA). Only 1 - 2% was in the Double Hearing Protection (106 - 115 dBA). OS / Lab. Tech. Table 1A shows the average dose for the OS / Lab. Tech, was 42% dose. The OS / Lab. Tech, catches samples through out the entire block. From 49 - 79% of the time, the noise exposure for this job was in the range of ^ 80 dBA as seen on Table IB. OS / Load. Oper The average dose for the OS / Load. Oper. was 21% as seen in Table 1A. The highest sample that was taken on 2/3/93, the operator was loading and evacuating tank cars. The majority of the noise for this sample was in the Single Hearing Range (91 - 105 dBA) with some in the Double Hearing Protection (106 - 115 dBA). OS / Vinyl Area Table 1A shows the average noise dose for this job to be 74%. Table IB shows that most of the noise in the > 90 dBA range was in the range of Single Hearing Protection (91 - 105 dBA), with a single 1 minute excursion for the Double Hearing Protection Range (106 - 115 dBA) and the Limited Exposure Range (> 115 dBA). Shift Supv. (Days) The average noise dose for the Shift Supv. (Days) was 16% according to Table 2A. From 78 87% of the time, the noise exposure for this job was in the range of < 80 dBA with some in the Single Hearing Protection Range (91 - 105 dBA) as seen on Table 2B. Senior Operations Specialist (SOS) / Control Board The average noise dose for this job was 11% as seen on Table 2A. From 83 - 89% of the time, the noise exposure for this job was in the range of 5 80 dBA with some in the Single Hearing Protection Range (91 - 105 dBA) as showed on Table 2B. RESTRICTED FOR USE WITHIN DOW 6 00 A 114069 CONFIDFNTTAl SQS / Permit Writer The average noise dose for this job was 24% as seen on Table 2A. The majority of the noise for these samples (3) was in the Single Hearing Range (91 - 105 dBA) with some in the Double Hearing Protection (106 - 115 dBA). SQS / Vac. Relief The average noise dose for this job was 51% as seen on Table 2A. This operator performed shift relief for the Operations Specialist working in the Vinyl side of the plant. Only one sample was taken for this job and 55% of the time the noise exposure for this job was in the range of s 80 dBA with some in the Single Hearing Protection Range (91 - 105 dBA) as showed on Table 2B. Insulator Table 3A shows the average noise dose for this job to be 48%. Table 3B shows that most of the noise in the > 90 dBA range was in the range of Single Hearing Protection (91 - 105 dBA), with some in the Double Hearing Protection Range (106 - 115 dBA) and the Limited Exposure Range (> 115 dBA). Laborer Table 3A shows the average noise dose for this job to be 42%. From 31 - 70% of the time, the noise exposure for this job was in the range of ^ 80 dBA as seen on Table 3B. Also, Table 3B shows that most of the noise in the > 90 dBA range was in the range of Single Hearing Protection (91 * 105 dBA), with some in the Double Hearing Protection Range (106 * 115 dBA). Pipefitter / Welder The average noise dose for this job was 49% as shown in Table 3A. From 35 - 70% of the time, the noise exposure for this job was in the range of <. 80 dBA as seen on Table 3B. Also, Table 3B shows that most of the noise in the > 90 dBA range was in the range of Single Hearing Protection (91 - 105 dBA), with some in the Double Hearing Protection Range (106 - 115 dBA) and the Limited Exposure Range (> 115 dBA). The highest doses occurred on 3/10 - 3/11/93 where the person worked with an impact wrench. Analyzer Table 4A shows the average noise dose for this job is 12%. Table 4B shows that most of the noise in the > 90 dBA range was in the range of Single Hearing Protection (91 -105 dBA), with some in the Double Hearing Protection Range (106 - 115 dBA) and the Limited Exposure Range (> 115 dBA). Electrician The average noise dose for the Electrician job was 40% as shown on Table 4A. One result of 87% was caused by noise levels greater than > 90 dBA when the electrician was working near E320 for a significant part of the day. Most of the noise in the > 90 dBA range was in the range of Single Hearing Protection (91 - 105 dBA), with some in the Double Hearing Protection Range (106 - 115 dBA) as shown on Table 4B. Instrument Table 4A shows the average noise dose for this job was 14%. From 70 - 89% of the time, the noise exposure for this job was in the range of 5 80 dBA as seen on Table 4B. Also, Table 4B shows that most of the noise in the > 90 dBA range was in the range of Single Hearing Protection (91 - 105 dBA), with some in the Double Hearing Protection Range (106 - 115 dBA). RESTRICTED FOR USE WITHIN DOW 7 DO A 114070 CONFIDFNTTAl Day Jobs C.A.T.. Engineer. Maint. Supv.- Material Controller, Office Professional, QS / Env-IH ContactProd. Supv.. SOS / Safety & Train.. Sr. Lab. Specialist. The average noise dose for these jobs ranged from 0 - 16% as shown in Table 5A. The lowest being the Office Professional with 0% dose and the highest dose being the Material Controller and the OS / Env-IH Contact with 16% dose. From 76 - 98% of the time, the noise exposure for these jobs were in the range of 80 dBA as seen on Table 5B. Also, Table 5B shows that most of the noise in the > 90 dBA range was in the range of Single Hearing Protection (91 - 105 dBA), with only one (1) excursion in the Double Hearing Protection Range (106 - 115 dBA). This excursion was for the OS / Env-IH Contact job, it is noted that he went into the Cl 10 btms area. RESTRICTED FOR USE WITHIN DOW 8 DO A U4071 KlT T Al . Table 1 A: Results of Employee's Personal Time Weighted Average Noise Exposing1) at Vinyl 2 Plant. Louisiana Division, Plaquemine, Louisiana, April 92 - March 93 For Job Classification: Operations Specialist (38) Master t Number 1 Dale OS / EDC-Ecology 099506 10/27/92 098086 4/25/92 246353 7/28/92 OS / Lab Tech. 241775 11/9/92 098091 3/4/93 098089 3/5/93 095782 3/8/93 433731 4/24/92 433852 7/29/92 OS / Load. Oper. 095783 2/3/93 438-59-3826 2/4/93 435-47-9314 2/8/93 OS / Vinyl Area 098091 11/9/92 241775 12/10/92 095783 8/3/92 Avg Sample Sound Time Level (min) dBA % Dose % Dose Corrected To Full Shift Comments 478 87 62 466 86 54 484 84 45 Avg. Dose 94-12hr Making EDC/Ecology outside round. 83 -12hr Making EDC/Ecology outside round. 67 -12hr Making EDC/Ecology outside round. 81 506 81 32 472 83 37 484 76 16 473 79 21 480 83 37 464 80 23 Avg. Dose 46 -12hr Catching and analyzing samples 57-12hr Caught /analyzed samples; helped outside in vinyl area 23 -12hr Caught/analyzed samples 32 -12hr Caught/analyzed samples; extras after lunch 56-12hr Catching and analyzing samples 35 -12hr Catching and analyzing samples. 42 466 80 23 488 52 1 457 78 17 Avg. Dose 36 -12hr Loading and evacuating tankcars 1 -!2hr Evacuating tankcars; no loading, inside office work 27 -12hr Evacuating tankcars; no loading; caught and ran loading samples 21 491 84 47 488 84 45 497 86 60 Avg. Dose 69-12hr Making Vinyl outside round. 67-12hr Making Vinyl outside round. 87 -12hr Running Vinyl outside round. 74 1 Industrial Hygiene flnifif.ltnf-g OSHA 8-Hour TWA OSHA 12-Hour TWA Dow Ceiling (2) 90 dBA (100% dose) 87 dBA (100% dose) 90 dBA 1 Monitoring conducted with Dupont Mk-2 Audio Dosimeter. Quest Micro - 15 Noise Dosimeter and Quest M-27 Noise Logging Dosimeter -> each set at 80 dBA threshold, 90 dBA criterion level and 5 dBA doubling rate. 2 Hearing Protection was worn in the posted areas where noise levels are greater than the ceiling limit of 90 dBA as part of the normal job routine. - RESTRICTED FOR USE WITHIN DOW 9 -114072 DO A cohft DFNTTAL Table IB: Results of Employee's Personal Time Weighted Average Noise Exposure(l) at Vinyl 2 Plant. Louisiana Division, Baquemine, Louisiana, April 92 - March 93 For Job Classification: Operations Specialist (38) Master __ Number f21_______ OS / EDC-Ecology 099506 10/27/92 098086 4/25/92 246353 7/28/92 s 80 81 -90 >90 > 90 dBA Range dBA dBA dBA Statistical Distribution Range Range Range Single HP Double HP Limited Range Range(4) Exposure 91 - 105 106-115 Range Sample % dBA dBA > 115 dBA Time Measured % % % % % % % % % % % % (mini Doee(31 Time Dose lime. Dose Time-Boae Time Dose Time Dose Time Dose 478 62 43 3 33 16 23 46 23 44 0 1 0 0 466 54 40 3 41 20 19 33 18 31 0 2 0 0 484 45 41 4 44 24 13 21 13 21 0 0 0 0 % Dose Corrected To Full Shift 94-12hr 83 -12hr 67 -12hr OS / Lab Tech. 241775 11/9/92 506 32 69 5 20 11 10 20 10 20 0 0 0 0 46-12hr 098091 3/4/93 472 37 49 4 40 20 10 16 10 16 0 0 0 0 57 -12hr 098089 3/5/93 484 16 79 6 16 8 4 8 4 8 0 0 0 0 23 -12hr 095782 3/8/93 473 21 66 5 28 12 58 5 8 0 0 0 0 32-12hr 433731 4/24/92 480 37 60 5 27 14 12 23 12 22 0 1 0 0 56-12hr 433852 7/29/92 464 23 71 5 23 11 5 11 5 10 01 0 0 35 -12hr OS / Load. Oper. 095783 2/3/93 466 23 69 6 23 10 7 13 7 12 01 0 0 36 -12hr 438-59-3826 2/4/93 488 1 99 2 0 0 0 0 0 0 0 0 0 0 1 -12hr 435-47-9314 2/8/93 457 17 72 5 22 9 58 5 8 0 0 0 0 27 -12hr OS / Vinyl Area 098091 11/9/92 491 47 48 3 35 19 16 28 16 27 0 0 0 0 69 -12hr 241775 12/10/92 488 45 54 4 37 18 8 27 8 14 02 0 11 67 -12hr 095783 8/3/92 497 60 43 4 37 19 19 41 19 39 0 2 0 0 87 -12hr (1) Monitoring conducted with Quest M-27 Doameter with OSHA setting of 80 dBA threshold, 90 dBA criterion level and 5 dBA doubling rate. (2) See Table A for comments. (3) Measured dose for the sample time period is the sum of % dose in the 81-90 dBA and the >90 dBA columns. (4) Noise levels >110 dBA reduces the safety factor for double hearing protection. - RESTRICTED FOR USE WITHIN DOW - 10 DO A 114073 CONFIDENTIAL Table 2A: Results of Employee's Personal Time Weighted Average Noise Exposure! 1) a* Vinyl 2 Plant. Louisiana Division, Plaquemine, Louisiana, April 92 - March 93 For Job Classification: SOS (42) / Shift Supv (05) Master Number Shift Supv. 432581 432350 1 Date (Day) 1/13/93 2/15/93 SOS / Control Board 432638 10/29/92 434052 11/6/92 433807 4/29/92 202119 7/31/92 SOS / Permit Writer 432638 2/10/93 432638 2/22/93 432034 2/9/93 SOS / Vac. Relief 434052 7/30/92 Avg Sample Sound Time Level (mini dBA % Dose % Dose Corrected To Full Shift Comments 516 72 9 485 75 13 Avg. Dose 13 -12hr Made outside round for about 2 hours 20 -12hr Daily meetings; rounds in field 16 505 72 8 483 72 8 493 71 7 471 69 5 Avg. Dose 12 -12hr Ran the board. 12 -12hr Inside all day. 11 -12hr Routine day. 8-12hr On the board all day. 11 462 80 26 494 82 36 476 74 10 Avg. Dose 27 -8hr Wrote permits 35-8hr Wrote permits in field all day 10-8hr Wrote permits; went to medical for physical 9:30 to 10:00am 24 503 82 35 Avg. Dose 51-12hr Outside Vinyl area round 51 1 Industrial Hygiene Guidelines OSHA 8-Hour TWA OSHA 12-Hour TWA Dow Ceiling (2) 90 dBA (100% dose) 87 dBA (100% dose) 90 dBA 1 Monitoring conducted with Dupont Mk-2 Audio Dosimeter, Quest Micro - 15 Noise Dosimeter and Quest M-27 Noise Logging Dosimeter -> each set at 80 dBA threshold, 90 dBA criterion level and 5 dBA doubling rate. 2 Hearing Protection was worn in the posted areas where noise levels are greater than the ceiling limit of 90 dBA as part of the normal job routine. - RESTRICTED FOR USE WITHIN DOW - DO A 114074 f onFT dETNTT Al 11 Table 2B: Results of Employee's Personal Time Weighted Average Noise Exposurefl) at Vinyl 2 Plant. Louisiana Division, Plaquemine, Louisiana, April 92 - March 93 For Job Classification: SOS (42) / Shift Supv (05) s 80 81-90 >90 > 90 dBA Range dBA dHA dBA Statistical Distribution Range Range Range Single HP Double HP Limited Range Range(4) Exposure % 91- 105 106- 115 Range Dose Sample % dBA dBA >115 dBA Corrected Master Time Measured % % % % % % %%%%%% To Full Number (2i Dale -tmin) Dose (3~> Time Dose Time Dose Time Pw Time Dose Time Dose Time Dose Shift Shift Supv. (Day) 432581 432350 1/13/93 2/15/93 516 485 9 87 4 10 4 2 4 2 4 0 0 0 0 13 -12hr 13 78 5 19 8 3 5 3 5 0 0 0 0 20-12hr SOS / Control Board 432638 10/29/92 434052 11/6/92 433807 4/29/92 202119 7/31/92 505 483 493 471 8 84 6 14 6 1 2 1 2 0 0 0 0 12 12hr 8 86 5 12 5 2 2 2 2 0 0 0 0 12-I2hr 7 83 7 15 6 1 1 1 1 0 0 0 0 11 -!2hr 5 89 5 9 4 1 1 1 1 0 0 0 0 8-12hr SOS / Permit Writer 432638 2/10/93 462 26 66 5 26 12 7 14 7 13 0 1 0 0 27 -8hr 432638 2/22/93 494 36 65 4 23 11 11 24 10 21 0 3 0 0 35-8hr 432034 2/9/93 476 10 83 4 13 6 2 4 2 4 0 0 0 0 10-8hr SOS / Vac. Relier 434052 7/30/92 503 35 55 4 34 18 9 17 9 16 0 0 0 0 51 -12hr (1) Monitoring conducted with Quest M-27 Dosimeter with OSHA setting of 80 dBA threshold, 90 dBA criterion level and 5 dBA doubling rate. (2) See Table A for comments. (3) Measured dose for the sample time period is the sum of % dose in the 81-90 dBA and the >90 dBA columns. (4) Noise levels >110 dBA reduces the safety factor for double hearing protection. - RESTRICTED FOR USE WITHIN DOW DO A 114075 CONFIDENTIAL 12 Table 3A: Results of Employee's Personal Time Weighted Average Noise Exposuref 1) at Vinyl 2 Plant. Louisiana Division, Haquemine, Louisiana, April 92 - March 93 For Job Classification: Maintenance Master 1 Number Insulator 587-90-7907 434-13-1306 587-90-7907 437-73-6023 437-98-8648 1 Date 11/5/92 12/9/92 3/10/93 3/11/93 3/8/93 Laborer 439-94-2453 439-19-5916 439-94-2453 435-21-6103 12/8/92 12/8/92 3/10/93 5/6/92 Plpefitter/Welder 433-21-4457 12/9/92 439-39-8515 3/10/93 433-11-8846 3/11/93 436-74-2038 8/4/92 Avg Sample Sound Time Level [ (min) dBA % Dose % Dose Corrected To Full Shift Comments 473 86 53 374 84 37 469 87 66 456 82 31 493 S3 40 Avg. Dose 54-8hr Insulating cblonne line in piperack south of C255 & Dill. 47 -8hr General plant work. 68-Shr Insulating work at F410 32 -8hr Insulating around F410 39-8hr Insulating by F410 48 477 85 52 481 85 52 487 80 24 492 S3 39 Avg. Dose 52 -8hr Worked around C404 area. 52 -8hr Worked around C404 area. 24-8hr General work all over plant 38 -8hr Routine plant maintenance 42 436 80 20 499 87 66 453 87 61 482 84 45 Avg. Dose 22 -8hr General plant work; Quench area. 64-8hr Worked in Oxy structure all day 65-8hr Pipelining around F106andT120 45-8hr General maintenance 49 1 Industrial..Hygi.ene.Guidelines OSHA 8-Hour TWA OSHA 12-Hour TWA Dow Ceiling (2) 90 dBA (100% dose) 87 dBA (100% dose) 90 dBA 1 Monitoring conducted with Dupont Mk-2 Audio Dosimeter, Quest Micro - 15 Noise Dosimeter and Quest M-27 Noise Logging Dosimeter -> each set at 80 dBA threshold, 90 dBA criterion level and 5 dBA doubling rate. 2 Hearing Protection was worn in the posted areas where noise levels are greater than the ceiling limit of 90 dBA as part of the normal job routine. - RESTRICTED FOR USE WITHIN DOW 13 DO A 11 4076 C0NFTDFNTTAL Table 3B: Results of .Employee's Personal Time Weighted Average Noise Exposure! 1) at Vinyl 2 Plant. Louisiana Division, Plaquemine, Louisiana, April 92 - March 93 For Job Classification: Maintenance Master __ Number f2i Insulator 587-90-7907 434-13-4306 587-90-7907 437-73-6023 437-98-8648 Date 80 81 -90 >90 > 90 dBA Range dBA dBA dBA Statistical Distribution Range Range Range Single HP Double HP Limited Range Range(4) Exposure % 91 - 105 106-115 Range Dose Sample dBA dBA > 115 dBA Corrected Time Measured % % % % % % % % % % % % To Full (mini. Dose 131 Time Dose Time Dose Time Dose Time Dose Time Dose Time Doae Shift 11/5/92 473 53 42 3 44 27 13 25 13 22 0 2 0 2 54 -8hr 12/9/92 374 37 45 2 42 17 12 19 12 16 0 1 0 2 47 -8hr 3/10/93 469 66 53 8 30 12 15 53 14 34 1 17 0 3 68-8hr 3/11/93 456 31 44 5 47 18 7 12 7 12 0 0 0 0 32 -8hr 3/8/93 493 40 43 4 46 19 10 20 10 20 0 0 0 0 39 -8hr Laborer 439-94-2453 439-19-5916 439-94-2453 435-21-6103 12/8/92 ATI 52 52 4 34 15 13 36 13 30 0 6 0 0 52 -8hr 12/8/92 481 52 31 2 54 25 14 26 14 25 0 1 0 0 52 -8hr 3/10/93 487 24 70 5 23 10 6 14 6 12 0 1 0 0 24-8hr 5/6/92 492 39 57 6 31 14 10 25 10 22 0 4 0 0 38 -8hr Pipefitter/Welder 433-21-4457 12/9/92 436 20 70 5 25 9 4 10 4 7 0 1 0 3 22 -8hr 439-39-8515 3/10/93 499 66 35 3 50 24 15 42 14 29 1 10 0 2 64-Slu 433-11-8846 436-74-2038 3/11/93 453 61 46 4 36 15 17 45 17 38 0 6 0 0 es-8hr 8/4/92 482 45 48 4 38 17 13 27 13 26 0 2 0 0 45-8hr (1) Monitoring conducted with Quest M-27 Dosimeter with OSHA setting of 80 dBA threshold, 90 dBA criterion level and 5 dBA doubling rate. (2) See Table A for comments. (3) Measured dose for the sample time period is the sum of % dose in the 81-90 dBA and the >90 dBA columns. (4) Noise levels >110 dBA reduces the safety factor for double hearing protection. * RESTRICTED FOR USE WITHIN DOW - DO A 1.14077 CONFIDENTIAL 14 Table 4A: Master I Number Analyzers 238814 238814 Electrician 434-98-7549 425-82-6094 435-37-6511 425-82-6094 Instrument 435-47-7836 099529 435-27-5157 436-41-2742 Results of Employee's Ftersonal Time Weighted Average Noise Exposing 1) at Vinyl 2 Plant. Louisiana Division, Plaquemine, Louisiana, April 92 - March 93 For Job Classification: Instrument/Electrical (10) 1 Date Avg Sample Sound Time Level Mol dBA % Dose % Dose Corrected To Full Shift Comments 2/17/93 3/1/93 454 69 5 445 78 17 Avg. Dose 5 -8hr Office work; round and maint on analyzers in Held 18 -8hr Computer work; round in field; 12 10/28/92 3/5/93 3/9/93 ' 8/5/92 . 460 89 S3 490 77 18 476 85 50 537 68 5 Avg. Dose 87 -8hr Worked around E320`S all day. 17 -8hr Electrical work @ load rack, cooling tower, inst shop, and chlor. area 50-8hr Electrical work in T400 area 5-8hr Wired up temporary building. 40 12/10/92 3/9/93 3/9/93 4/30/92 524 73 10 461 79 22 451 70 6 461 77 16 Avg. Dose 9-8hr General work. 23 -8hr Instrument work in field 7 -8hr Inside control room wiring Mod cans 16-8hr Working in the block. 14 Industrial Hygiene Guidelines OSHA 8-Hour TWA OSHA 12-Hour TWA Dow Ceiling (2) 90 dBA (100% dose) 87 dBA (100% dose) 90 dBA 1 Monitoring conducted with Dupont Mk-2 Audio Dosimeter, Quest Micro - 15 Noise Dosimeter and Quest M-27 Noise Logging Dosimeter -> each set at 80 dBA threshold, 90 dBA criterion level and 5 dBA doubling rate. 2 Hearing Protection was worn in the posted areas where noise levels are greater than the ceiling limit of 90 dBA as part of the normal job routine. - RESTRICTED FOR USE WITHIN DOW 15 DO A 1 1 4078 CONFIDENTIAL Table 4B: Results of Employee's Personal Time Weighted Average Noise Exposure(l) at Vinyl 2 Plant. Louisiana Division, Haquetnine, Louisiana, April 92 - March 93 For Job Classification: Instrument/Electrical (10) Master __ Number 121 Analyzers 238814 238814 Electrician 434-98-7549 425-82-6094 435-37-6511 425-82-6094 Instrument 435-47-7836 099529 435-27-5157 43641-2742 Date 5 80 81 -90 >90 > 90 dBA Range dBA dBA dBA Statistical Distribution Range Range Range Single HP Double HP Limited Range Range(4) Exposure 91 - 105 106-115 Range Sample % dBA dBA > 115 dBA Time Measured % % % % % % % % % % % % .(mm),, -Dots131 Time Dose Time Dose Time Dose Time Dose Time Dose. % Dose Corrected To Full Shift. 2/17/93 3/1/93 454 445 5 91 3 73 12 1 2 0 0 0 0 5 -8hr 17 74 5 20 8 5 8 5 8 0 1 0 0 18 -Shr 10/28/92 460 83 52 2 8 4 40 78 40 77 0 0 0 0 87 -8hr 3/5/93 490 18 78 5 17 8 4 10 4 8 0 1 0 0 17 -Shr 3/9/93 476 50 48 4 35 15 17 34 17 32 0 2 0 0 50 -Shr 8/5/92 537 5 88 4 9 5 2 5 2 5 0 0 0 0 5 -Shr 12/10/92 524 10 85 4 12 5 2 4 2 4 0 0 0 0 9 -8hr 3/9/93 461 22 70 3 26 14 3 7 3 5 0 0 0 1 23-Shr 3/9/93 451 6 89 4 10 4 0 2 0 1 0 0 0 1 7 -8hr 4/30/92 461 16 75 6 21 8 4 8 4 7 0 1 0 0 16-Shr (1) Monitoring conducted with Quest M-27 Dosimeter with OSHA setting of 80 dBA threshold, 90 dBA criterion level and 5 dBA doubling rate. (2) See Tabic A for comments. (3) Measured dose for the sample time period is the sum of % dose in the 81-90 dBA and the >90 dBA columns. (4) Noise levels >110 dBA reduces the safety factor for double hearing protection. - RESTRICTED FOR USE WITHIN DOW - DO A 114079 CONFIDENTIAL. 16 Table 5A: Results of Employee's Personal Time Weighted Average Noise Exposuref l) at Vinyl 2 Plant. Louisiana Division, Plaquemine, Louisiana, April 92 - March 93 For Job Classification: Day Jobs Master 1 Number C. A. T. 433253 1 Date 1/22/93 Engineer 240276 095534 240558 11/3/92 5/4/92 8/6/92 Maint. Supv. 431559 1/18/93 Materia! Controller 431559 1/19/93 Office Professional 086546 1/26/93 OS / Env-IH Contact 434047 1/21/93 Prod. Supv. 434185 2/25/93 SOS / Env-IH Contact 431998 2/18/93 SOS / Safety & Train. 433773 1/14/93 Sr. Lab Specialist 432566 2/15/93 Avg Sample Sound Time Level (min) dBA 516 71 Avg. 458 70 441 67 510 65 Avg. 586 74 Avg. 452 77 Avg. 463 59 Avg. 476 77 Avg. 462 72 Avg. 466 67 Avg. 521 51 Avg. 470 73 Avg. % Dose 7 Dose 6 4 3 Dose 13 Dose 15 Dose 1 Dose 16 Dose 8 Dose 4 Dose 0 Dose 9 Dose % Dose Corrected To Full Shift Comments 7 -8hr General work in computer room 7 6-8hr Made round in Ecology area. 4-8hr Made a round in the furnace area 3 -8hr Inside project work. Checked outside job. 4 10-8hr General supervision 10 16-8hr General Work 16 1 -8hr General office duties 1 16-8hr Mostly inside. Went out to Cl 10 btms 16 8 -8hr Meetings; outside round; office and computer work. 8 4-8hr Meetings; office work; computer work 4 0-8hr Inside training class 0 9-8hr General lab and office work 9 1 Industrial. Hygiene Guidelines OSHA 8-Hour TWA OSHA 12-Hour TWA Dow Ceiling (2) 90 dBA (100% dose) 87 dBA (100% dose) 90 dBA 1 Monitoring conducted with Dupont Mk-2 Audio Dosimeter, Quest Micro - 15 Noise Dosimeter and Quest M-27 Noise Logging Dosimeter -> each set at 80 dBA threshold, 90 dBA criterion level and 5 dBA doubling rate. 2 Hearing Protection was worn in the posted areas where noise levels are greater than the ceiling limit of 90 dBA as part of the normal job routine. - RESTRICTED FOR USE WITHIN DOW 17 q0 A 114080 CONFIDENT! At- Table 5B: Results of Employee's Personal Time Weighted Average Noise Exposurefl) at Vinyl 2 Plant Louisiana Division, Plaquemine, Louisiana, April 92 - March 93 For Job Classification: Day Jobs Master Number (21 C. A. T. 433253 Dale 80 81 - 90 >90 > 90 dBA Range dBA dBA dBA Statistical Distribution Range Range Range Single HP Double HP Limited Range Range<4) Exposure % 91 - 105 106- 115 Range Dose Sample % dBA dBA > 115 dBA Collected Time Measured % % % % % % % % % % % % To Full /mini Dose (3) Time Dose Time Dose Time Dose Time Dose Time Dose Time Dose Shift 1/22/93 516 7 86 6 12 5 12 12 00 00 7-8hr Engineer 240276 095534 240558 11/3/92 5/4/92 8/6/92 458 441 510 6 88 3 11 4 1 1 11 00 00 6-8hr 4 92 2 62 11 11 00 00 4-8hr 3 94 3 52 01 01 00 00 3-8hr Maint. Supv. 431559 1/18/93 586 13 82 5 15 8 24 24 00 0 0 10-8hr Material Controller 431559 1/19/93 452 15 76 4 19 8 47 46 00 0 0 16 -8hr Office Professional 086546 1/26/93 463 1 98 2 10 00 00 00 00 1 -8hr OS / Env-IH Contact 434047 1/21/93 476 16 80 4 15 6 4 10 49 01 0 0 16-8hr Prod. Supv. 434185 2/25/93 462 8 87 4 10 4 2 3 2 3 0 0 0 0 8-8hr SOS / Env-IH Contact 431998 2/18/93 466 4 92 3 62 11 11 00 00 4-Shr SOS / Safety & Train. 433773 1/14/93 521 0 98 3 l0 00 00 00 00 0 -8hr Sr. Lab Specialist 432566 2/15/93 470 9 88 5 8 3 3 6 3 6 0 0 0 0 9-8hr (1) Monitoring conducted with Quest M-27 Dosimeter with OSHA setting of 80 dBA threshold, 90 dBA criterion level and 5 dBA doubling rate. (2) See Table A for comments. (3) Measured dose for the sample time period is the sum of % dose in the 81-90 dBA and the >90 dBA columns. (4) Noise levels >110 dBA reduces the safety factor for double hearing protection. - RESTRICTED FOR USE WITHIN DOW 18 DO A 11 4081 CONFIDENTIAL I IF igure 1: __ Vln v l Area Noise Survey 5/93 FLARE STACKO RESTRICTED FOR USE WITHIN tOW ' C O N F ID E N T IA L