Document baaBdqGGnNkY24ZyoLOQNOxro

LOUISIANA DIVISION INDUSTRIAL HYGIENE REPORT AN OPERATING UNIT OF THE DOW CHEMICAL COMPANY DEPARTMENT LIGHT HYDROCARBONS II FILE NUMBER LAD-LHC2 - 86.01 DATE 02-01-87 TITLE LHC II INDUSTRIAL HYGIENE ACTIVITY REPORT FOR 1986 AUTHORSS) SIGNATURES) Paul Laughlin Rock Gustin REVIEWER'S SIGNATURE , , SUMMARY The employees "that had a likelihood for exposure in their jobs to benzene, toluene, xylene, and/or 1,3-butadiene were monitored using approved sampling and analytical methods. Results of the monitoring showed no exposure problems. This finding supports historical data. Additionally, a noise survey was conducted and the results were presented to plant personnel along with some very interesting information about the effectiveness of various types of hearing protection devices. In 1987, noise, benzene, toluene, xylene, and 1,3-butadiene surveys will be conducted following major changes that the plant is scheduled to undergo. DISTRIBUTION Louisiana A. L. ROYALS K. D. DIAMOND * J. D. WELDON 3801 * R. W. GALLANT, 2306 * M. F. CURRIER, 2302 * M. E. NEVILL, 3502-E Midland LARRY RAMPY, 1803 G. W. ENGDAHL, 1803 * S. K. NORWOOD, 1803 J.E. LE BEAU, 1803 A. W. SHAFFER, 2030 S. M. GORGACZ, 474 COVER LETTER ONLY * D. * F. * G. Other E. CRAGER, FREEPORT, B-101 D. AXE, WESTERN DIV., 471 L. MEIER, EASTERN DIV., STRONGSVILLE, OHIO DO 081377 CONFTDFNTTAL LHC II Industrial Hygiene Report, 1986 February 03, 1987 Page 2 BENZENE EXPOSURE EVALUATION Explanation of Guidelines and Sampling Method The ACGIH Threshold Limit Value (TLV-TWA) for benzene is 10 (ten) ppm. Dow's Industrial Hygiene Guide calls for a 10 (ten) ppm ceiling and does not allow short term excursions above this ceiling. The 3M organic vapor monitor badge (#3500) was used to obtain breathing zone samples of operators working in areas most likely to contain benzene. The badges, which use an active charcoal wafer as a collection medium, were desorbed with carbon disulfide and analyzed by gas chromatography. 1 Personnel Monitoring As shown on Table 1 (Attachment 1) the personnel samples were well below the 10 ppm TLV-TWA. This agrees with historical data. See also Attachment 2. TOLUENE EXPOSURE EVALUATION Explanation of Guidelines and Sampling Method The ACGIH Threshold Limit Value (TLV-TWA) for toluene is 100 ppm with a TLV-STEL of 150 ppm. The TLV-STEL is a 15 minute exposure guideline. The 3M organic vapor monitor badge (#3500) was used to obtain breathing zone samples of operators working in areas most likely to contain toluene. The badges, which use an active charcoal wafer as a collection medium, were desorbed with carbon disulfide and analyzed by gas chromatography. 1. Personnel Monitoring As shown on Table 2 (Attachment 3) the personnel samples were well below the 100 ppm TLV-TWA. This agrees with historical data. See also Attachment 4. XYLENE EXPOSURE EVALUATION Explanation of Guidelinesand Sampling Method The ACGIH Threshold Limit Value (TLV-TWA) for xylene is 100 ppm with a TLV-STEL of 150 ppm. The TLV-STEL is a 15 minute exposure guideline. DO 081378 CONFTDENTTAl LHC II Industrial Hygiene Report, 1986 February 03, 1987 Page 3 The 3M organic vapor monitor badge (#3500) was used to obtain breathing zone samples of operators working in areas most likely to contain xylene. The badges, which use an active charcoal wafer as a collection medium, were desorbed with carbon disulfide and analyzed by gas chromatography. 1. Personnel Monitoring As shown on Table 3 (Attachment 5) the personnel samples were well below the 100 ppm TLV-TWA. This agrees with historical data. See also Attachment 6. 1,3-BUTADIENE EXPOSURE EVALUATION Explanation of Guidelines and Sampling Method The ACGIH Threshold Limit Value (TLV-TWA) for 1,3-butadiene is 10 (ten) ppm . No TLV-STEL value was available. The TLV-STEL is a 15 minute exposure guideline. The 3M organic vapor monitor badge (#3500) was used to obtain breathing zone samples of operators working in areas most likely to contain 1,3-butadiene. The badges, which use an active charcoal wafer as a collection medium, were desorbed with carbon disulfide and analysed by gas chromatography. 1. Personnel Monitoring As shown on Table 4 (Attachment 7) the personnel samples were well below the 10 ppm TLV-TWA. This agrees with historical data. See also Attachment 8. NOISE EXPOSURE EVALUATION Method and Explanation of Guidelines A DuPont MK-2 Audio Dosimeter was used as a sound level meter to measure area noise levels. The dosimeter meets or exceeds all current requirements established by government agencies in the United States for personal audio dosimeters. All noise measurements were made using an 80 and 90 db(A) threshold level and a 90 db(A) criterion level. The threshold is the level that noise must exceed to be included in the dose calculation and the criterion is the decibel level that will yield a 100 percent dose in eight hours. The 90 db(A) criterion level is an OSHA regulation, to obtain the dose percent using the Louisiana Division criterion level of 85 db(A) the results were multiplied by two (2). This is true due to the 5 db(A) doubling rate that is included in both the OSHA regulations and the Louisiana Division Standard. All of the audio dosimeters were calibrated before with an Audio Dosimeter Calibrator at sound level of 94 decibels. DO 081379 CONFIDENTIAL LHC II Industrial Hygiene Report, 1986 February 03, 1987 Page 4 1. Area Surveys As shown in Attachments 9 & 10, most of the plant is a high noise area (>90 dbA), especially around the turbomachinery. The entire plant is considered an ear protection area. High noise areas are posted with warning signs and these areas are communicated to employees in the annual Industrial Hygiene Safety Meetings. SAMPLING STRATEGY FLAW FOR 1997 1- Noise Conduct area surveys following major modifications to the plant (scheduled for the later part of 1987) and while the plant is being shut-down and started-up. 2. Benzene, toluene, xylene, and 1.3-butadiene Conduct personnel monitoring and area surveys following minor changes to existing waste water system (first half 1987). Repeat monitoring and surveys following start-up of new waste water treating system late in 1987. No other monitoring is considered necessary as indicated by historical data. ACCOMPLISHMENTS AND GOALS Hearing - Rock Gustin Accomplishment: Investigated efficiencies of various types of hearing protection used in block and communicated this information to all employees. Block 39 Ponds - Don Taylor Accomplishment: Cleaned and eliminated waste water ponds in Block 39. Asbestos Removal - Paul Laughlin DO OS 1380 cONFIDFNTTAL Accomplishment: Asbestos in the furnace area was removed and reinsulated with asbestos free material. This represented approximately one third of all asbestos in the block. Goal: Remove half of remaining asbestos in the block. LHC II Industrial Hygi n Report> 1986 February 03, 1987 Page 5 Benzene Emissions - Hock Gustin Accomplishment: Monitored 457 valves every other month with an average leaker rate of 0.5% Goal: Reduce leaker rate to 0%. V.O.C. Emissions - Rock Gustin Accomplishment: Reduced leaker rate from 16% to 3.6% in 1986 of valves monitored for V.O.C. emissions. Goal: Continue reducing leaker rate to 2% or lower. Waste Water Vapors - Jim Kennedy, Paul Laughlin Goal: Eliminate vapors associated with waste water system by incorporating a degassing vessel in the design of a new waste water treating system. ATTACHMENT 10 AREA SOUND SURVEY DO 0 8 1 3 8 ? CO NFIDENT I Al ATTACHMENT Q AREA SOUND SURVEY DO 0 8 1 0 8 3 GONFTDFNTTAl FILLED IN BY P. LAUGHLIN PLANT LHC #2________ BLOCK 48 EMPLOYEE EXPOSURE SUMMARY QUARTER 4 YEAR J36 UR# 9999-0115 IHG _P_P_M_ CHEMICAL 1.3 - BUTADIENE________________ MINIMAL DETECTABLE LIMIT AND UNIT .000523 mg/ml JOB NO. CLASS PERSONNEL__________________ EXCURSION AREA PT TWA NO. ** EXCUR. NO. EQ. BASIS SAMP. AVG. HIGH C DURATION SAMP. AVG. ** HIGH C SAMPLE NO. DURATION SAMP. AVG. * HIGH C 02 OT 03 SOT 06 EDO 8 hr 8 hr -- 8 hr 4 * .041 .101 8 < .034 .121 1 .439 .439 06 EDO 3 8 hr 3 < .122 .203 1 ** COMMENTS 1. MINIMAL D ETECTA BLE LIM [T & UN [T ARE .002 MGy ML | r> OO Z !_) TJ MO O cts T1 -> ZM H 0T> *-1 >. > PROTECTIVE EQUIPMENT: (1) MOUTHBIT (2) FULL FACE (3) HALF FACE OR DUST (4) AIR SUPPLY (5) HEARING PROTECTION COMMENTS (use reverse side) tu_o *** LHC II Industrial Hygiene Report, 1986 February 03, 1987 Page 12 ATTACHMENT 7 EMPLOYEES TIME WEIGHTED AVERAGE POTENTIAL EXPOSURE CHEMICAL 1,3-BUTADIENE (TLV-TWA; 10 PPM) DURATION DATE CMIN) 11-07 230 11-10 457 11-10 457 11-10 465 11-11 466 11-11 476 11-11 454 11-12 484 11-12 480 11-12 488 11-13 379 11-13 455 11-13 363 12-08 452 12-08 453 12-08 451 VOLUME (L) 11.339 22.530 22.530 22.925 22.974 23.467 22.382 23.861 23.664 24.058 18.685 22.432 17.896 22.284 22.333 22.234 JOB LOAD EP RESID O.T. MECH S.O.T. FURNACE S.O.T. MECH S.O.T. FURNACE S.O.T. O.T. MECH S.O.T. FURNACE S.O.T. O.T. MECH S.O.T. O.T. FURNACE S.O.T. CLEANING API** CLEANING API** CLEANING API** EMPLOYEE 431527 434219 431743 277606 432593 432972 434319 432972 433401 432972 433844 282733 433646 432017 432414 432783 RESULT f PPM) 0.4392 < 0.0210 < 0.0210 < 0.0207 < 0.0206 < 0.0202 < 0.0212 < 0.0198 < 0.0200 < 0.0197 0.1212 0.1009 < 0.0265 < 0.0815 0.2027 < 0.0813 AVERAGE: < 0.0773 NOTE ** COMFO II RESPIRATORS WERE WORN DO OS 1385 OONFIDFNTIAl FILLED IN BY P. LAUGHLIN PLANT LHC ii2 BLOCK 48 CHEMICAL ATTACHMENT b EMPLOYEE EXPOSURE SUMMARY DR# 0002-5081_________ XYT.ENE MINIMAL DETECTABLE LIMIT AND UNIT .0021 MG/ML QUARTER 4 YEAR 86 IHGiqq pPM JOB NO. CLASS 02 OT PERSONNELEXCURSION AREA PT TWA NO. ** EXCUR. NO. ** EQ. BASIS SAMP. AVG. HIGH C DURATION SAMP. AVG. HIGH C - 8 HR 4 . 066 ^.082 SAMPLE NO. DURATION SAMP. AVG. * HIGH C 03 SOT - 8 HR 8 054 .086 06 EDO - 8 HR 1 .085 .085 O yo mn r^rj M05 PROTECTIVE EQUIPMENT: (1) MOUTHBIT (2) FULL FACE (3) HALF FACE OR DUST (4) AIR SUPPLY (5) HEARING PROTECTION 'rnwMPHTc s ----------------- - i ' LHC II Industrial Hygiene Report, 1986 February 03, 1987 Page 10 ATTACHMENT 5 EMPLOYEES TIME WEIGHTED AVERAGE POTENTIAL EXPOSURE CHEMICAL XYLENE (TLV-TWA: 100 PPM) DURATION DATE CMINI 11-07 230 11-10 457 11-10 457 11-10 465 11-11 466 11-11 476 11-11 454 11-12 484 11-12 480 11-12 488 11-13 379 11-13 455 11-13 363 VOLUME (L) 11.339 22.530 22.530 22.925 22.974 23.467 22.382 23.861 23.664 24.058 18.685 22.432 17.896 JOB LOAD EP RESID O.T. MECH S.O.T. FURNACE S.O.T. MECH S.O.T. FURNACE S.O.T. O.T. MECH S.O.T. FURNACE S.O.T. O.T. MECH S.O.T. O.T. FURNACE S.O.T. EMPLOYEE NUMBER 431527 434219 431743 277606 432593 432972 434319 432972 433401 432972 433844 282733 433646 RESULT fPEM) < 0.0853 < 0.0429 < 0.0429 0.0603 < 0.0421 < 0.0412 0.0823 < 0.0405 < 0.0409 0.0670 0.0863 0.0719 0.0772 AVERAGE: < 0.0601 DO 0610S7 C0NFIDFNTTAL FILLED IN BY P. LAUGHLIN PLANT LHC #2___________ BLOCK ATTACHMENT 4 EMPLOYEE EXPOSURE SUMMARY DR# 0002-5070___________ CHEMICAL TOLUENE MINIMAL DETECTABLE LIMIT AND UNIT QUARTER IHG 0.0021 MG/MI 4 YEAR 100 PPM 86 NO. 02 03 06 JOB CLASS OT SOT EDO PERSONNEL _____ __________________ EXCURSION AREA PT TWA NO. ** EXCUR. NO. SAMPLE NO. EQ. BASIS SAMP. AVG. HIGH C DURATION SAMP. AVG. HIGH C DURATION SAMP. AVG. 8 HR 4 <.060 .095 _ 8 HR 8 <.051 4.062 - 8 HR 1 <.098 <.098 ** HIGH C oa "zn o >-* o a oo [n >-* -f 00 >ih> a> PROTECTIVE EQUIPMENT: (1) MOUTHBIT (2) FULL FACE (3) HALF FACE OR DUST <i|) AIR SUPPLY (5) HEARING PROTECTION LHC II Industrial Hygiene Report, 1986 February 03, 1987 Page 8 ATTACHMENT 3 EMPLOYEES TIME WEIGHTED AVERAGE POTENTIAL -EXPOSURE CHEMICAL TOLUENE (TLV-TWA: 100 PPM) DURATION DATE fMIN) 11-07 230 11-10 457 11-10 457 11-10 465 11-11 466 11-11 476 11-11 454 11-12 484 11-12 480 11-12 488 11-13 379 11-13 455 11-13 363 VOLUME fL) 11.339 22.530 22.530 22.925 22.974 23.467 22.382 23.861 23.664 24.058 18.685 22.432 17.896 JOB LOAD EP RESID O.T. MECH S.O.T. FURNACE S.O.T. MECH S.O.T. FURNACE S.O.T. O.T. MECH S.O.T. FURNACE S.O.T. O.T. MECH S.O.T. O.T. FURNACE S.O.T. EMPLOYEE NUMBER 431527 434219 431743 277606 432593 432972 434319 432972 433401 432972 433844 282733 433646 RESULT (PPM) < 0.0983 < 0.0495 < 0.0495 < 0.0486 < 0.0485 < 0.0475 0.0948 < 0.0467 < 0.0471 < 0.0463 < 0.0596 < 0.0497 < 0.0623 AVERAGE: < 0.0575 00 081389 CONFIDENT!^ FILLED IN BY P. LAUGHLIN PLANT LHC 2 BLOCK _48 AliAUlMhlMi' 2 EMPLOYEE EXPOSURE SUMMARY DR# 0002-5058__________ CHEMICAL BENZENE MINIMAL DETECTABLE LIMIT AND UNIT QUARTER 4 YEAR IHG 10 PPM 0.0002MG/ML 86 JOB NO. CLASS 02 OT 03 SOT PERSONNEL_______________________________ EXCURSION AREA PT TWA NO. ** EXCUR. NO. ** EQ. BASIS SAMP. AVG. HIGH C DURATION SAMP. AVG. HIGH C _ 8 HR 4 0.426 0.713 - 8 HR 8 0.145 0.291 SAMPLE NO. DURATION SAMP. AVG. * HIGH C 06 EDO - 8 HR 1 0.497 0.497 n oo Z L' 'll nO rn ^ Z--[ U) *) ------- M (_> I> PROTECTIVE EQUIPMENT: CD MOUTHBIT (2) FULL FACE (3) HALF FACE OR DUST (4) AIR SUPPLY (5) HEARING PROTECTION LHC II Industrial Hygiene Report, 1986 February 03, 1987 Page 6 ATTACHMENT 1 EMPLOYEES TIME WEIGHTED AVERAGE POTENTIAL EXPOSURE CHEMICAL BENZENE (TLV-TWA: 10 PPM) DURATION DATE (MIN) 11-07 230 11-10 457 11-10 457 11-10 465 11-11 466 11-11 476 11-11 454 11-12 484 11-12 480 11-12 488 11-13 379 11-13 455 11-13 363 VOLUME (L) 11.339 22.530 22.530 22.925 22.974 23.467 22.382 23.861 23.664 24.058 18.685 22.432 17.896 JOB LOAD EP RESID O.T. MECH S.O.T. FURNACE S.O.T. MECH S.O.T. FURNACE S.O.T. O.T. MECH S.O.T. FURNACE S.O.T. O.T. MECH S.O.T. O.T. FURNACE S.O.T. EMPLOYEE NUMBER 431527 434219 431743 277606 432593 432972 434319 432972 433401 432972 433844 282733 433646 RESULT (PPM) 0.4969 0.3890 0.0834 0.0956 0.0954 0.2001 0.7132 0.0656 0.2910 0.3383 < 0.0670 0.2651 0.2624 AVERAGE: 0.2586 oo 031 CONFTOFMTI^