Document ZLaJv098VVwZ2bMbLjn024v7

LOUISIANA DIVISION INDUSTRIAL HYGIENE REPORT AN OPERATING UNIT OF THE DOW CHEMICAL COMPANY CHLORINE lPLANT Department LAD-CHLORINE 91.01 File Number 7/16/1991 Date Tide: Evaluation of employees' exposure to noise, asbestos, chlorine, and lead and associated Industrial Hygiene Activities at the Louisiana Division Chlorine 1 Plant, Plaquemine, Louisiana during 1990. Author's Signature Author's Signature Reviewer's Signature SUMMARY: During 1990, personal time weighted average (TWA) exposures to noise and chlorine were evaluated. Excursion or short term exposures to asbestos during specific tasks were evaluated and area monitoring for lead exposures during non-routine maintenance was performed. A sound level survey was conducted throughout the plant. Employee exposures to asbestos during task related activities ranged from <0.01 to 0.09 fibers per cc of air. Task involving glove bag asbestos removal ranged between 0.01 to 0.09 fibers per cc of air and were potential exposures because personnel wore North 7700 half-face respirators equipped with high efficiency filters during the job. The job task of pulping chlorine cells with wetted asbestos ranged from <0.01 to 0.04 fibers per cc of air. The job of pulping cells is handled in a closed system. This data is well within the OSHA short term excursion limit of 1.0 fibers per cc of air for a 30 minute duration. All results were reported based on the limit of detection of 7 fibers/mm2. (Continued on Page 2) DISTRIBUTION: Plaauemine; L. Adcock T. Austin C. Cooke G. Kusch J. Muller A. Royals A. Sandow * * * * * * B-2306 B-3701 B-2601 B-2303 B-2601 B-3502W B-3701 * Cover Sheets Only Midland: G. Engdahl J. Lebeau L. Rampy A. Schaffer M. Swank * * * B-1803 B-1803 B-1803 B-1803 B-1803 DO A 043^79 C- QNF TFNTTAl_ RESTRICTED FOR USE WITHIN THE DOW CHENi ^ COMPANY SUMMARY: (CONT'D) Personnel exposures to chlorine during normal 12-hour shift activities ranged from 0-0.3 ppm. The OSHA 8-hour time-weighted average limit is 0.5 ppm. Continued periodic monitoring for chlorine exposure is planned. Personal audio dosimeter measurements of employee exposure to noise were collected and average results of the allowable daily dose corrected to an 8-hour or 12-hour full shift axe listed below: g-H0ULShift Cell Treating Specialist Environmental Specialist Safety Coordinator Day Shift Supervisor 07% 08% 33% 16% 12-HouLShift Liquefaction Specialist Brine Operations Spec Cell Operations Spec. 81% 36% 19% All personnel received training and an annual audiogram. One Dow employee showed a unilateral standard threshold shift in hearing. He was evaluated by a consulting audiologist and his results reviewed. His shift in hearing was not felt to be related to on the job noise exposure. Additional noise monitoring will be collected to complete the evaluation of all job classifications. The chlorine drying train area compressors and pumps accounted for most area noise above 90 decibels. All areas of the plant with noise levels above 90 decibels are posted to require the use of hearing protection. One area sample was collected downwind of a non-routine job during sandblasting of brine tanks coated with a lead-based paint. The lead level result was 5.8 micrograms per cubic meter which is well below the OSHA 8-hour time weighted average limit of 50 micrograms per cubic meter. All quality control laboratory fume hoods were evaluated for face velocity and met the classification of an "A" class hood. Hazard communication and respiratory protection training was given to all employees during the year. IPT modules are being developed in the Chlorine 1 Plant and will be used in employee training. Radiation sealed sources located in the Chlorine 1 Plant were wipe tested. All results were below the minimum detection limit of <0.005 microcuries of removal activity. There are four sealed radiation sources located in the Chlorine 1 Plant One source is an Ohmart level detector for the chlorine storage sphere T-56, another is an Ohmart density device for hydrochloric acid and the last two sources are Texas Nuclear lab analyzers. The required warning signs are posted The Chlorine 1 Plant has an ongoing fugitive emission monitoring program which includes corrective action on any leaks. This preventive program is an effective measure to reduce potential employee exposure. As part of the asbestos management program all asbestos-containing materials were inspected for condition, labeling and inventory accuracy. Any asbestos needing repair is handled by qualified asbestos abatement personnel and replaced with non-asbestos material where available. RESTRICTED FOR USE WITHIN THE DOW CHEMICAL COMPAI a. PURPOSE ( A & As part of a continuous effort to provide a healthful and safe work environment for the personnel of Chlorine 1 Plant, a program to evaluate employee's exposure to asbestos, noise, chlorine and lead was conducted in 1990. This report addresses the work performed including recommendations for 1991. CONCLUSIONS 1. Employee exposures to asbestos during task related activities ranged from <0.01 to 0.09 fibers per cc of air. These results are within the OSHA short term exposure limit of 1.0 fibers per cc of air for a 30 minute duration. Samples were collected during asbestos removal projects and pulping of the chlorine diaphragm cells using wetted asbestos in a closed system. 2. Chlorine exposures during normal 12-hour shift activities ranged from 0-0.3 ppm. These concentrations are to be compared with the OSHA 8-hour time-weighted average limit of 0.5 ppm. The Chlorine Plant block policy requires all personnel to carry a mouth-bit respirator to be used for escape from acid gases. 3. Results of employee full shift, eight and twelve hour, average noise exposure for each job assignment monitored in 1990 are listed below (expressed as a percent of the allowable daily dose): Cell Treating Specialist Environmental Specialist Safety Coordinator Day Shift Supervisor Liquefaction Specialist Cell Operations Specialist Brine Operations Specialist 07% 08% 33% 16% 81% 19% 36% These results represent potential rather than actual noise exposure because hearing protection is worn by all employees in posted high noise areas of the plant. Areas with noise levels greater than 90 dB(A) are posted to require hearing protection. The hearing protection will atttenuate noise levels below the OSHA 8-hour time weighted average of 90 dB(A). Annual audiograms were performed on all employees. One Dow employee showed a unilateral standard threshold shift in hearing. He was evaluated by a consulting audiologist and his results reviewed. His shift in hearing was not felt to be related to on the job noise exposure. 4. Area air-borne lead concentrations were monitored during a non-routine maintenance task of sandblasting brine tanks coated with a lead-based paint. The downwind concentration was 5.8 micrograms per cubic meter which was well within the OSHA 8-hour permissible exposure limit of 50 micrograms per cubic meter of air. 5. An area sound level survey was conducted of the Chlorine 1 Plant during 1990. Area compressors and pumps in the chlorine drying train account for most noise levels above 90 decibels. These areas are posted with hearing protection required signs. 6. The control room lab, cell crew lab and main lab hoods were surveyed during 1990. Face velocity measurements and smoke capture performance met the requirements of an "A" classification rating. The main lab hood has a scrubber on the exhaust to avoid venting chlorine to the atmosphere. Weak caustic is used as the scrubbing solution. 3.RESTRICTED FOR USE WITHIN THE DOW CHEMICAL COMPANY no OONF A 4o;?a.i TDfrN ttal 7. Radiation sealed sources located in the Chlorine 1 Plant were wipe tested. All results were below the minimum detection limit of <0.005 microcuries of removal activity. There are four sealed radiation sources located in the Chlorine 1 Plant One source is an Ohmart level detector for the chlorine storage sphere T-56, another is an Ohmart density device for hydrochloric acid and the last two sources are Texas Nuclear lab analyzers. The required warning signs are posted 8. The Chlorine 1 Plant is in the process of developing IPT Modules to be utilized for training purposes. These modules will cover safety related subjects and be used in employee training. 9. Training on the hazards within the Chlorine 1 Plant was presented during Hazard Communication Training. This training is presented to both Dow and contract employees. A written Hazcom program manual exists in the plant and all material safety data sheets were updated during 1990. 10. Respiratory protection training was conducted on the respiratory protection available within the Chlorine 1 Plant The training included proper use, limitations and donning procedures. The Louisiana Division Safety and Loss Prevention Standard S-206 and Chlorine block policy were reviewed. 11. Training on the hearing conservation program was presented and included the effects of excessive noise to the ear. Personnel were instructed in the proper use of hearing protection and the importance of using hearing protection in high noise areas. 12. The Chlorine 1 Plant has an ongoing fugitive emission program which includes corrective action for any leaks detected. This proactive program reduces potential employee exposures to chlorine, hydrochloric acid, and carbon tetrachloride. 13. The Chlorine 1 Plant has an asbestos management program which requires an annual inspection of all asbestos-containing materials. The inspection includes condition of material, labeling requirements and inventory accuracy. Any asbestos-containing material needing repair is handled by qualified asbestos abatement personnel and is replaced with non-asbestos material where available. '.ESTRICTED FOR USE WITHIN THE DOW CHEMICAL COMPANY DO A 04328? GONFTDFNTTAL RECOMMENDATIONS r-. Li-_t/j 1. Additional noise monitoring is needed to complete the evaluation of all job classifications potential exposure to noise including the contract jobs. Continue to perform the plant area noise survey and have an octave-band analysis performed to determine what engineering controls may be implemented to reduce noise levels. 2. Review and update the Chemical and Physical Agent Inventory for the Chlorine 1 Plant for all job classifications including an update of all job descriptions. 3. Develop a written Hearing Conservation Program for Chlorine 1 Plant and include in annual hearing conservation training along with effects of excessive noise exposure to the ear, and proper care, use and effective attenuation of hearing protectors. 4. Conduct personal monitoring for organic vapors, hydrochloric acid and sulphuric acid during appropriate task specific jobs to confirm that potential exposures are within OSHA limits. 5. Continue to perform annual Hazcom and Respiratory training. Update Hazcom training to include the effects of radiation. 6. Continue to monitor asbestos task specific jobs to confirm regulatory compliance. 7. Monitoring for chlorine exposure needs to be continued but at a reduced level due to the extensive amount of sampling data collected during the past seven years. 8. Update the contractor personnel indoctrination check sheets. Clarify item 7 on the contractor indoctrination check sheet which states "knowing area hazards" to specifically address Hazard Communication Training. Add to the indoctrination check sheet respirator fit-testing. 9. Update the Dow personnel training module to address initial training on hazard communication training, respiratory protection, block Industrial Hygiene policy, respirator fit-test, hearing conservation program and asbestos handling guidelines. 10. Evaluate the present use of Varsol as the cleaning solvent used for degreasing operations to determine if it is the best choice of solvent Implement a procedure for changing and disposing of spent solvent. DO A 043383 CONFIDENTIAL RESTKSE i`f)' FOR USE WITHIN THE DOW CHEMICAL COMPANY r o- EVALUATION CRITERIA t&. k \ *% 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 health 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 chemical and physical agents monitored in 1990 at the Chlorine 1 Plant are outlined below. Chemical Agent Physical Agent Noise Asbestos (Al) Chlorine Lead EXPOSURE GUIDELINES -1 TWA 85 dB(A) 0.2 Fib/cc 0.5 ppm 50 ug/m3 -2 Excursion 90 dB(A), C 1.0 1.0 -- -3 Source Dow/OSHA OSHA OSHA OSHA -5 T.I.M.E. Dow Registry Ref. DR-8000-1032 DR-0027-0713 DR-0006-7834 DR-0016-2005 1. TWA - 8-hour time weighted average Exposure Guidelines. 2. Excursion - Short-term Exposure Guidelines. 3. Source - Dow Industrial Hygiene Guidelines ACGIH - American Conference of Governmental Industrial Hygienist Threshold Limit Value (TLV). OSHA - Permissible Exposure Limit Supplier - Guideline recommended by the manufacturer. 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). A1 - Known Human Carcinogen A 043*84 CONFTDFNTTAI RESTRICTED FOR Wi.HIN THE DOW CHEMICAL COMPANY 6. NOISE fck> c a ah The current Dow exposure guideline for noise is a 90 dB(A) ceiling. In addition, the Hearing Conservation Amendment document (29CFR 1910.95) issued by the OSHA stated that the 8-hour TWA noise exposures should not exceed 90 decibels as measured on the A-scale [dB(A)] of a sound pressure level meter at the slow response setting. Dow Louisiana Division expresses die guidelines as an 8-hour TWA of 85 dB(A). A TWA exposure of 85 dB(A) or more requires participation in a hearing conservation program. Areas that exceed the 90 dB(A) ceiling are posted with signs and mandatory hearing protection is required. For simplication, a 100% dose is the maximum allowable dose for the workday regardless if it is in an 8 or 12-hour shift. TOXICOLOGICAL INFORMATION Toxicological data on the chemical and physical agents monitored at the Chlorine 1 Plant in 1990 are available on the T.I.M.E. system. SAMPLING AND ANALYTICAL METHODS NOISE Personal noise dose measurements were taken using Dupont MK-2 audio dosimeters, serial number 14318, set at 80 dB(A) threshold, 90 dB(A) criterion, and 5 dB(A) doubling rate. Area sound level measurements were taken with a Bruel & Kjaer sound level meter, Type 2219, serial number 598847 calibrated at 94 dB(A). AIRBORNE CHEMICALS ASBESTOS Employees breathing zone sampling for asbestos during task related activities were taken using Gilian high flow pumps serial numbers 5072 and 9796 calibrated at a flow rate between 2.0 and 2.5 liters per minute. An open faced Neuclepore 0.8 micron size 25 mm mixed cellulose filter cassette was used. Personnel involved in asbestos removal wore North 7700 half-face respirators equipped with high efficiency filters during the job. Analysis was performed by West-Paine, an outside laboratory, using NIOSH 7400A method. CHLORINE Chlorine vapors were collected using a Wolcott chlorine electrochemical sensor with a Metrosonics microprocessor datalogger. Each sensor was calibrated at several concentrations before and after sampling using a Metronics Dynacalibrator with certified chlorine permeation tubes. The datalogger provides a histiogram of potential chlorine exposure in 30 second averages. LEAD Area sampling for lead was conducted using a Gilian high flow pump calibrated at a flow rate of 2.5 liters per minute with a closed-face 37 mm mixed cellulose filter cassette. Analysis was performed by R. Barber, Research Analytical Dept., using NIOSH P&CAM 173 Method for trace metals reported under reference number 5419-17. VENTILATION DO A 043385 OONFTDFNTTAl Laboratory hoods were assessed using smoke tubes and an Almar Model 8525 Thermo Anemometer air velocity meter to determine capture performance and hood face velocities. RESTRICTED FOR USE WiTHIN T..~ jOW CHEMICAL COMPANY RESULTS AND DISCUSSION Li Personal samples were taken at the Chlorine I Plant to assess potential exposure to Asbestos during task related activities. The results of the data as shown in Table 1 indicate that levels ranged from <0.01 to 0.09 fibers per cc of air. This data is to be compared to the short term exposure limit of 1.0 fiber per cc of air for a 30 minute duration. All samples collected were 30 minute duration. All results were reported based on the limit of detection of 7 fibers/mm2. Two specific tasks were being monitored. Asbestos removal abatement tasks performed by qualified asbestos abatement insulators ranged from 0.01 to 0.09 fibers per cc of air during a glove bag removal of asbestos insulation from a 1" pipe. These sample results indicate potential exposure because the insulators wore North 7700 half-face respirators equipped with high efficiency filters during the job. The other task monitored was the pulping of chlorine diaphragm cells by the operations specialist working on the cell crew. Sample results for this task ranged from <0.01 to 0.04 fibers per cc of air. The asbestos is handled in a wet slurry which is transferred from a holding tank through a connected hose which is placed into a stopper opening on top of the chlorine diaphragm cell. The results of personal breathing zone sampling for chlorine is presented in Table 2. All samples were collected on operating personnel working 12-hour shifts during normal operating conditions. The results ranged from 0 -0.3 ppm time-weighted average with the average being 0.05 ppm. These concentrations are to be compared with the 8-hour timeweighted limit of 0.5 ppm. One sample collected by the cell operator specialist was reported at 80 percent of the time-weighted average limit. The Chlorine Plant block policy requires all personnel to carry either a MSA or American Optical R722 mouth-bit respirator to be used to escape from acid gases. The Chlorine Plant has been participating in the Dow-Tulane University Chlorine Epidemiology Study and as part of this study an extensive amount of sample collection has been done for chlorine exposure for the past seven years. Continued periodic monitoring for chlorine exposure is planned. Personal noise monitoring results are presented in Table 3 for employees in the Chlorine Plant Monitoring was conducted on both 8-hour shift and 12-hour shift operations. The data results were corrected to reflect the dose percent to either 8-hour or 12-hour depending on shift duration. One sample collected was above the 50% dose being calculated at 81% dose. This sample was collected from the liquefaction operation specialist The allowable noise percent dose is 100 percent. All areas of the plant with noise levels above 90 decibels are posted to require the use of hearing protection. Further monitoring to characterize all job classifications in the Chlorine Plant is planned for 1991 sample collection. One area sample was collected for air-borne lead concentrations during a non-routine job. The results are shown in Table 4. Several brine tanks coated with a lead based paint were sandblasted during maintenance. The sample was collected downwind of the operation. The result was 5.8 micrograms per cubic meter which is well below the 8-hour time weighted average limit of 50 micrograms per cubic meter. Figure 1 shows a plot plan of the Chlorine 1 Plant denoting noise levels of area equipment throughout the plant taken during an area noise survey. Results are reported in decibel readings. Area compressors and pumps accounted for most noise above 90 dB with the chlorine drying train having the most sources. An octave band analysis is planned to determine what engineering controls may be implemented to reduce noise levels in the chlorine facility. DO A 043286 CONFTDFNTIAL RESTRICTED FOR USE WITHIN THE DOW CHEM^AL COMPANY 2- Table 1: Results of Employee Breathing Zone Sampling for Asbestos During Task Related Activities at the Louisiana Division Chlorine 1 Plant, Piaquemine, Louisiana, 1990. Sample No. 10482 Master No. Job Assien. 437-21-3070 Insulator Time Date (M in.l 8/3 30 Asbestos Concentration fFibers/cc >5 micron LODil 0.093 10483 433-23-2653 Insulator 8/3 30 0.03a 10484 434-17-6970 Insulator 8/3 30 10903 10904 10901 10905 10906 10907 434034 433590 433590 433590 434034 433590 Operation Specialist Cell Crew 12/5 O. S. Cell Crew O. S. Cell Crew 12/6 12/7 O. S. Cell Crew O. S. Cell Crew 12/11 12/12 O. S. Cell Crew 12/13 30 30 30 30 30 30 Industrial Hygiene Exposure Guidelines OSHA - PEL Short Term Exposure Limit Samples were collected on an open-face Neuclepore .8 micron 25 mm mixed cellulose cassette. a) Personnel wore North 7700 half-face respirator with high efficiency filters during the job. b) Not detected at the minimum analytical detection limit. c) Voided sample - could not be counted due to Oiler damage. d) All results are reported based on the limit of detection of 7 fibers/mm^. 0.01a 0.01 <0.0 lb 0.04 c 0.01 <0.0 lb 1.0 Comments Glove Bag Removal Method of l"Pipe Glove Bag Removal Method of 1" Pipe Glove Bag Removal Method of l"Pipe Pulping Cells Pulping Cells Pulping Cells Pulping Cells Pulping Cells Pulping Cells r*- \ DO A 0 4 3 ? 8 7 OONFTDFNTTAL 6/28/91 MT/daa Table 2: Results of Personal Breathing Zone Sampling for Chlorine at the Louisiana Division Chlorine I Plant, Plaquemine, Louisiana, 1990. Master Number Job Assien. Sample Date Number 274450 Operation Specialist Cell Operator 10-24 CL-90001 434041 O.S. Cell Operator 10-24 CL-900G2 098097 Operation Specialist Brine Operator 10-24 CL-90003 434192 O. S. Brine Operator 10-30 CL-90007 202696 Operation Specialist Salt Operator 10-30 CL-90006 434201 Operation Specialist liquefaction Operator 10-30 CL-90010 433383 Sr. Opeation Specialist 10-24 CL-90004 Board Opeator 432922 S.O.S. Board Operator 10-30 CL-90008 432021 Shift Supervisor 10-24 CL-90005 430930 Shift Supervisor 10-30 CL-90009 433-74-8170 Tank Car Loader 10-30 CL-90011 Time fMin.) 635 701 668 621 858 695 514 693 516 746 720 Conc.(PPM) 0.3 0.0 0.0 0.0 0.1 0.2 0.0 0.0 0.0 0.0 0.0 Comments 12 Hour Shifls(l) 12 Hour ShiftsO) 12 Hour ShiftsO) 12 Hour ShiftsO) 12 Hour ShiftsO) 12 Hour ShiftsO) 12 Hour ShiftsO) 12 Hour ShiftsO) 12 Hour ShiftsO) 12 Hour ShiftsO) Contractor^)) OSHA - PEL 8-Hour Time Weighted Avg. 0.5 (!) All samples woe collected on personnel working the 12 hour shifts. 6/28/91 MT/daa Table 3: Results of employee's personnel time weighted average noise exposure ** at the Louisiana Division Chlorine I Plant, Plaquemine, Louisiana, 1990. Master Job Time LAve %Dose Calculated ftumbtl___ Assign.Dalt_(Minl dBAftPflStTo Full 12 Hr. Shift^! Comments 433323 433825 431224 431654 432357 430475 433632 433588 098084 Cell Treating Cell Treating Environmental Specialist Safety Coordinator Safety Coordinator Day Supervisor Liquefaction Operator Cell Operator Brine Operator 12-5 12-6 12-7 495 65.9 491 70.7 485 72.1 12-11 477 12-13 462 12-14 458 12-11 737 12-12 717 12-14 735 85.6 77.6 76.9 85.4 75.1 79.7 7.4 7.0 7.8 47.3 17.2 15.6 83.4 18.9 36.5 7.2 8-hour shifts 6.9 8-hour shifts 7.7 8-hour shifts 47.6 8-hour shifts 17.9 8-hour shifts 16.3 8-hour shifts 81.4 12-hour shifts 18.9 12-hour shifts 35.7 12-hour shifts [)0 A 0 4 3 7 8 9 CONFIDE: NTT Al Industrial Hygiene Guidelines: 8 hr TWA 12 hr TWA 90dBACeilingO) OSHA OS HA DOW 90 87 100 ** Monitoring conducted with a Dupont MK-2 audio dosimeter serial #14318. (!) Exposure should not exceed the ceiling limit at anytime unless hearing protection is worn. (2) Precent dose expressed according to the Louisiana Division 85dB(A) TWA would be twice that shown in Table 3. 6/28/91 MT/daa r3 r- 1 t ' ,V"~s tS Table 4: Results of Area Sampling for Lead at the Chlorine I Plant, Louisiana Division, Plaquemine, Louisiana, 1990. Date 8/17 Area Brine Tanks Sample No. 10495 Line (Mini 80 Cone. ue/m2 5.8 Comments Downwind sampling while sandblasters were blasting lead based paint on brine tanks. 9> Industrial Hygiene Guidelines: 8-hour TWA OSHA 50 Samples was collected on a close-face 37 mm mixed cellulose cassette. r~ VJ r t u.1 FIGURE 1 RESULTS OF AREA NOISE SURVEY AT THE LA DIVISION CHLORINE 1 PLANT, PLAQUEMINE LA-SEPTEMBER 1190 USING A BRUEL AND KJAER SOUND LEVEL METER TYPE 2211, SERIAL NUMBER 518547 CALIBRATED AT 14 DECIBELS. DO A 043291 OONFTOFNTTAl \3- 1v ,SW\S- r CHLORINE PLANT ANNUAL NOISE SURVEY r. f^S E3 * *'>"& The 1990 Chlorine Plant Noise Survey has been conducted. Acceptable noise exposure is 85 dB for eight hours. It is imperative that we require hearing protection to be worn in all areas 90 dB and higher. C-100A C-701A NORTH C-701A NORTH A-TRAIN RECYCLE P-702'S C-701A SOUTH T-701B SECOND DECK SOUTH AIR DRYER C-40 A/B NORTH C-90/91 AREA NORTH D-100A C-300A P-260 AREA C-52 E-65 C-90/91 AREA SOUTH E-64/63 AREA C-40A/B SOUTH C-500B VS-2 FIRST DECK S-11/12 GRD LVL DIST. DECK(GRD LVL) BRINE HEATING AREA S-3/4 GRD LVL DIST. DECK (2ND LVL) EC-65 (TOP DECKO P-4'S HYDROGEN COOUNG TWR W CAUSTIC SUMP R-3 NORTH NORTH AIR BLOWER R-2 NORTH (NEW) UQ. DIST. MANIFOLD T-13 AREA P-56 UQ. SECOND DECK UQ. THIRD DECK R-5 NORTH S-7/8 GRD LVL S-19/20 GRD LVL S-17/18 GRD LVL S-13/14 GRD LVL R-1 NORTH FRONT OFFICE NORTH 96 94 94 92 92 92 92 91 91 91 91 90 90 90 88 88 87 86 86 85 84 84 84 82 82 82 81 80 80 80 80 80 80 80 79 79 79 78 77 74 74 74 70 55 on CQMpr A 043?<}p rfrNTTA/.. )4. 3 LOUISIANA DIVISION LL r> ;r INDUSTRIAL HYGIENE HOOD PERFORMANCE TESTING DATA Facility I.D.: ChlorineDate of Test 2-7-90 Hood I.D.: Cell Crew Lab Hood ______________________________ Tested by: W. E. Ledford 4 Static Pressure Readings (S.P.) No Static Pressure Indicator on Hood. SASH Closed: SASH Open: SASH @ 18": S.P. * S.P. = S.P. - inches of H_0 inches of HjO inches of HjO Hood Face Velocity Readings at SASH Opening of 22.5 inches (Indicate approximate measurement points and actual velocity readings) Actual Face Velocities: Mean (FV): 270FPM K t it >i Minimum (FV ) 200FPM Hood Classification (based on above face velocity readings) - Class A X Class B ________________ Class C ________________ Class D (Inadequate) _______ FV > 125 FPM FV >100 FPM) FV = 100 - 124 FPM VV = 75 - 99 FPM FV" > 80FPM) FV^ > 50FPM) FV < 74FPM FVmm< 50 FPM) Smoke Tube Observations (SASH at Work Opening of 22.5 Iinches) X Good (Air capture by hood is strong and well defined with minimal internal turbulence, and no observable smoke swirling back to hood face when person stands at hood face.) Moderate (Air capture by hood is positive but with some internal turbulence observed approaching the hood face. No smoke escaping the hood.) Poor (Air capture by hood is weak and/or not well defined. Turbulence inside the hood and smoke observed escaping hood face.) NOTE: Reevaluate if static pressure reading and anemometer reading differ + 25%. BH:cm 1/90 BH3 DO A 043393 OONFTDFNTIAL LOUISIANA DIVISION INDUSTRIAL HYGIENE HOOD PERFORMANCE TESTING DATA Facility I.D.: _Chlorine Hood I.D.:_2601-A Main Lab Tested by: _Darlene Creel Date of Test October 3, 1990 Static Pressure Readings (S.P.) No static pressure gauge SASH Closed: SASH Open: SASH @ 18": S.P. = S.P. = S.P. - inches of H_0 inches of H^O inches of H^O n RO Eg* Hood Face Velocity Readings at SASH Opening of __ 12 inches r --lary* (Indicate approximate measurement points and actual velocity readings) Actual Face Velocities: Mean (FV): __ 138FPM Minimum (FVm) ___ 132FPM Hood Classification (based on above face velocity readings) - FPM FPM Class A ___ X Class B _ _____ Class C ______ Class D (Inadequate) (YV > 125 FPM (FV = 100 - 124 FPM (FV =15-99 FPM (FV < 74 FPM FV >100 FPM) FV1" > 80 FPM) FV1" > 50 FPM) FVm < 50 FPM) m Smoke Tube Observations (SASH at Work Opening of __ 12 _ inches) X Good (Air capture by hood is strong and well defined with minimal internal turbulence, and no observable smoke swirling back to hood face when person stands at hood face.) ____ Moderate (Air capture by hood is positive but with some internal turbulence observed approaching the hood face. No smoke escaping the hood.) _____Poor (Air capture by hood is weak and/or not well defined. Turbulence inside the hood and smoke observed escaping hood face.) NOTE: Reevaluate if static pressure reading and anemometer reading differ + 25%. BH:cm 10/90 BH3 DO A 043794 C0NFTDFNTTAL lie. LOUISIANA DIVISION r- . INDUSTRIAL HYGIENE HOOD PERFORMANCE TESTING DATA t Facility I.D.: Chlorine Date of Test October 4Lr"{990 ^ Hood I.D.: Control Room Lab,, Tested by: Darlene Creel Static Pressure Readings (S.P.) No static pressure gauge SASH Closed: SASH Open: SASH @ 18": S.P. S.P. S.P. inches of H_0 inches of H^O inches of H^O Hood Face Velocity Readings at SASH Opening of 12 *** inches * (Indicate approximate measurement points and actual velocity readings) t VAV <55 LKi US Hi S9T Actual Face Velocities: ill Mean (FV): 125 FPM Minimum (FV ) 109 FPM Hood Classification (based on above face velocity readings) - Class A ___ X Class B Class C Class D (Inadequate) (FV > 125 FPM (FV = 100 - 124 FPM (FV = 75 - 99 FPM (FV < 74 FPM FV >100 FPM) FVm > 80 FPM) FV1" > 50 FPM) FVmm < 50 FPM) Smoke Tube Observations (SASH at Work Opening of 12 inches) #* X Good (Air capture by hood is strong and well defined with minimal internal turbulence, and no observable smoke swirling back to hood face when person stands at hood face.) ____ Moderate (Air capture by hood is positive but with some internal turbulence observed approaching the hood face. No smoke escaping the hood.) _____Poor (Air capture by hood is weak and/or not well defined. Turbulence inside the hood and smoke observed escaping hood face.) NOTE: Reevaluate if static pressure reading and anemometer reading differ + 25%. * Slight turbulence by caustic PH analyzer. 10/90 BH3 w DO A 043?95 GONFTDFNTTAL