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SHELL OIL COMPANY
SHELL CHEMICAL COMPANY
DEER PARK MANUFACTURING COMPLEX
r
TO R. G. DILLARD
DATE MARCH 8, 1976
FROM
MANAGER-SAFETY & INDUSTRIAL HYGIENE DEER PARK MANUFACTURING COMPLEX
SUBJECT
INDUSTRIAL HYGIENEEXPOSURE MONITORING
PROGRAM
Attached is the Industrial Hygiene Exposure Monitoring Plan developed by Jerry Ransdell for 21 chemicals of greatest concern within the complex.
This plan sets out a two-year, prioritized program for monitor ing employee exposure to the selected chemicals. The plan assumes continued full-time involvement of two laboratory technicians and about one-half of the Industrial Hygienist's time. The priorities for chemical monitoring were established on the basis of guidelines from Manufacturing Safety & Health on toxicity, as well as local factors such as potential for exposure, and the number of employees exposed. The required monitoring programs for VCM and Benzene will, of course, be continued, as will the AC monitoring and periodic free silica monitoring.
This plan is currently in effect. It is a part of our overall "Health Standard" program outlined in an earlier document. Managers throughout the complex are encouraged to distribute copies of this plan to their appropriate personnel (extra copies available from Maxine Wallace 56-247). Additionally, Jerry Ransdell is available to discuss this program at team meetings, or foreman meetings.
It is important that supervisors understand our Industrial Hygiene Programs, and we urge each manager to take positive steps to begin this educational process.
Attachment JLR:lg
J. L. Rivard
cc': Messrs. R. L. Brunner, Chem. Mfg. i, Dist. Mfg. Rep.
LAM 000572
H. L. Kusnetz, Mananger Safety and Health
J. D. Beasley H. J. Bettencourt K. C. Braud J. M. Braus
R. W. Bray C. H. Brown R. L. Bryan H. R. Campbell J. R. Cox
D. R. Deister R. P. Frutiger M. H. Grasley L. W. Horstman T. F. Hruska W. V. Jacks
R. M. Kemball-Cook D. H. Kievit K. S. Leach
R. V. Mattem D. H. McClintic D. E. Miller _ C. M. Noble
J. D. Ransdell F. G. Reitz C. H. Rivers D. O. Schissler
J. G. Massey
J. H. Tomfohrde H. G. Wilson
DPMC-16278
Acti.ncr Mar. for Pofinonr
M-iMirc (<-!
SHELL OIL COMPANY
SHELL CHEMICAL COMPANY
DEER PARK MANUFACTURING COMPLEX
DATE MARCH 2, 1976
TO DEER PARK MANUFACTURING COMPLEX
FROM INDUSTRIAL HYGIENIST
MANAGER - SAFETY & INDUSTRIAL HYGIENE
DEER PARK MANUFACTURING COMPLEX
SUBJECT INDUSTRIAL HYGIENE - EXPOSURE MONITORING PROGRAM
Monitoring the work environment is an essential portion of the industrial hygiene effort. Measurements of this type serve to define employee exposure and identify conditions which may be hazardous to health.
Personal (breathing zone) monitoring provides the measure of employee exposure which is comparable to the OSHA exposure limits. The results of such monitoring, not only ensure that employee exposures do not exceed safe exposure limits, but also provide the initial evaluation to comply with future health standards. This information may also be useful in any future epidemiological work.
The complexity of operation and the numerous process materials necessitate an organized plan for industrial hygiene surveillance with defined priorities and objectives. The plan in this memo outlines the criteria for selecting and prioritizing materials for industrial hygiene surveillance. This plan includes continuation of on-going personal sampling programs such as for vinyl chloride and benzene and introduces evaluation strategy for other significant materials.
Accomplishment of this plan will ensure that employee exposures do not pose a health risk, and will provide the initial measurement data necessary to comply with future health standards. Although no new periodic monitoring is scheduled in this plan, there is a possibility that periodic monitoring will be appropriate where exposures approach OSHA exposure limits. In terms-of the standard language seen in the most recent proposed standards, the "action level" for periodic monitoring is one-half the exposure limit.
I.PRIORITY-SETTING CRITERIA
With the concurrence of Manufacturing Safety & Health, the determination of survey priorities is based on the following factors:
A. Material Toxicity
Toxicity is the inherent property of a material to do harm. Materials of greater toxicity are rated higher in priority.
LAM 000573
DPMC-16279
DEER PARK MANUFACTURING COMPLEX MANAGER - SAFETY & INDUSTRIAL HYGIENE
2
B. Promulgation of OSHA Standard
The likelihood of a proposed or finalized standard which details monitoring (initial exposure evaluation and periodic), medical surveillance, compliance methods, etc. , is also considered in the establishment of priorities. The Standards Completion Project (SCP) could lead to standards for over 300 materials in the next few years. Materials appearing early on this list (e.g. , MEK, MIBK, mesityl oxide, allyl chloride, epichlorohydrin, ethylene dichloride, phenyl glycidyl ether, hydrogen sulfide, butyl glycidyl ether, allyl alcohol, ethyl chloride, trichloropropane, acetone, and hexane) are rated higher in priority as well as materials for which OSHA is considering exposure limit revisions (e.g., free silica, asbestos, benzene).
C. Potential for Exposure
The true hazard of a material depends not only on the toxicity but on the.potential for the material to escape into the working environment. This potential is determined by three factors: (1) the physical process (e.g., amount of material present, high temperature and pressure resulting in fugitive leaks, and process operations which are open to the atmosphere); (2) employee work practices (e.g., process sample collection and housekeeping); and (3) the materials's physical properties (e.g., volatility and density of vapor in air).
D. Number of Exposed Workers
As-the number of exposed workers increases, more people are potentially affected so the survey priority of a material is adjusted upwards.
Since the prime consideration in this surveillance plan is to evaluate the risk to employee health, factors (A), (B), and (D) are given the strongest consideration.
II. INDUSTRIAL HYGIENE SURVEILLANCE PLAN
On the basis of factors presented in priority setting, twentyone materials are identified for surveillance. This total includes materials for which monitoring is in progress as well as materials that have not been monitored. This plan, as summarized in table 1, calls for the continuation of vinyl chloride and benzene monitoring with gradual reductions in monitoring as exposure levels decrease or as exposure levels are confidently defined. Such reductions are anticipated at the end of 1976. The AC/ECH monitoring should continue through to- completion with only minor monthly sampling to check improvements from AC abatement work. The survey scheduling of the other materials are discussed sub sequently.
laM 000574
DPMC-16280
DEER PARK MANUFACTURING COMPLEX MANAGER - SAFETY & INDUSTRIAL HYGIENE
3
The total manpower requirements for the surveillance plan consists of: (1) 28.5 man-days per month to continue the present vinyl chloride monitoring, the present benzene monitoring, the_j>lanned monthly allyl chloride monitoring, and the planned monthly free silica monitoring; and (2) 350-450 man-days to complete initial exposure evaluations for the other materials.
Completion of the initial exposure evaluations, while main taining the periodic monitoring, will require two full-time laboratory technicians and approximately 50 percent of the industrial hygienist's time through 1977. Eighty to ninety percent of the monitoring would be in the Chemical Plant. Ten materials are in the Chemical Plant only and another nine materials are in both the Chemical Plant and Refinery with approximately eighty percent of the monitoring for such materials occurring in the Chemical Plant.
A. Priority Setting
The 21 materials are categorized into four groups to facilitate priority setting and survey planning: (1) carcinogens, mutagens, and teratogens (known or highly suspected); (2) chlorinated hydrocarbons; (3) ketones; (4) products of significant toxicity. Category (1) rates the highest priority in terms of the toxicity factor followed by groups (2) and (4). The potential for exposure is present with every material in each group. The exposure potential rating for groups (2) and (3) are about equal and generally higher than for materials in group 1. Group 4 materials vary in this respect with free silica rated highest followed by hydrogen sulfide. The remaining materials fall somewhere between group (3) and group (1). The number of exposed workers for each material is shown in the appendix with the number of job classifications scheduled for surveillance shown in table 1.
Priority based solely on the OSHA standard status is as follows. Vinyl chloride and asbestos rate highest because of existing standards. Because of impending proposed standards, group (3), benzene and free silica follow after vinyl chloride and asbestos. OSHA activities indicate glycidyl ethers, allyl alcohol, hexane and hydrogen sulfide would follow group (3) proposed standards. The next stage of standards development would include group (2) and ethylene dibromide with chlorine appearing near the end of the SCP list. No standards promulgation is foreseen for the aromatic amines in EPON Curing Agents for at least the next few years.
B. Monitoring Schedule
The vinyl chloride sampling results for 1975 indicate that eventually the frequency of monitoring can be reduced. Likewise, the 1975 results for benzene are low and a reduction in monitoring is likely. As the AC abatement program proceeds and exposures drop, so
LAM 000575
DPMC-16281
DEER PARK MANUFACTURING COMPLEX MANAGER - SAFETY & INDUSTRIAL HYGIENE
4
should the frequency of AC monitoring. The reduction in monitoring will probably not occur in 1976, but in 1977 it is foreseeable that VCM monitoring would be reduced from monthly to quarterly-and benzene and AC monitoring would be reduced 75 and 50 percent, respectively. As these reductions occur, sampling for the remaining materials will increase. The projected sampling schedule is diagramed in figure 1 and summarized in table 1.
The order in which the materials are surveyed depends not only on the priority-setting criteria, but also on the manufacturing conditions (e.g., whether the material is being used or manufactured or shipped) and the availability of a sampling collection/analytical method. Because of this, there is a great deal of overlap between surveys as shown in figure 1.
C. Sampling Collection/Analytical Methods
Since the list of 21 materials consist of vapors and particulates, a variety of sampling/analytical methods will be used. The plastic bag/gas chromatographic analysis method used for VCM will apply to the chlorinated hydrocarbons, allyl alcohol, and the ketones. Therefore, all analytical work will be at Deer Park. Sample analysis for aromatic amines, polycyclic aromatics, asbestos, free silica, and glycidyl ethers is or can be arranged with the Industrial Hygiene Laboratory, Westhollow Research Center.
Table 1 shows the sampling procedures for each material and estimates of survey time. Initial exposure evaluation for each material will be determined by collecting a number of personal samples on different employees in the same job classification. The number of samples (usually 5-10) should be adequate enough to define the day-to-day variability of exposure. The sampling protocol (i.e., job classifications and number of samples) for each material s detailed in the appendix.
D. Manpower Requirements
On the basis that these monitoring reductions occur after 1976, the present staffing of two laboratory technicians and one industrial hygienist would complete the planned initial exposure evaluations while continuing the planned periodic monitoring by the end of 1977. Figure 1, which outlines the surveillance schedule, shows the workload for the two laboratory technicians. Not included in this figure is the industrial hygienist's time. Approximately 50% of his time over the next two years would be required to arrange sampling protocols, review and interpret results, and work with the laboratory technicians in the collection of samples.
uaoo516
DPMC-16282
DEER PARK MANUFACTURING COMPLEX MANAGER - SAFETY & INDUSTRIAL HYGIENE
5
The estimates of sample collection/analysis time are based on experience with vinyl chloride, benzene, and allyl chloride monitoring. In addition to sample collection and analysis^ there is a certain amount of recordkeeping, report writing, equipment maintenance, etc., which usually consume as much time as the actual sample collection and analysis. Therefore, the total survey time is approximated by doubling the sampling/analytical time.
III. IMPLEMENTATION
This plan is designed to mesh with present survey work and can be implemented immediately. Additional manpower will be unnecessary.
Prior to beginning surveys for each material, the industrial hygienist and/or the laboratory technician should present the survey plans at appropriate shift foreman's meetings. At that time, an explanation can be made of the intent of the survey and the sampling procedure.
The sample results will be reported as promptly as possible to each department concerned. Each department should be encouraged to present the survey plan to their hourly personnel and to discuss sampling results. If survey results indicate overexposure, engineering or admin istrative controls should be prepared and scheduled for implementation. These plans should be communicated in writing to Safety and Industrial Hygiene.
IV. SUMMARY
The priority-setting criteria and the industrial hygiene surveillance plan are intended to organize the approach to employee exposure evaluation.
Your comments re invited, and I request your concurrence -to implement this plan.
JDR:lkc
Attachments
cc - R. L. Bryan F. G. Reitz
LAWI 000577
DPMC-16283
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