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YEAR
1945
None*
TLV
1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960
1961
5 m.p.p.c.f.(Asbestos, as "Mineral Dust")
5 m.p.p.c.f.(Asbestos, as "Mineral Dust")
5 m.p.p.c.f. (Asbestos, as "Mineral Dust")
5 m.p.p.c.f. (Asbestos as "Mineral Dust")
5 m.p.p.c.f.1 (Asbestos, as "Mineral Dust")
5 m.p.p.c.f.1 (Asbestos, as "Mineral Dust")
5 m.p.p.c.f.1 (Asbestos, as "Mineral Dust")
5 m.p.p.c.f.1 (Asbestos, as "Mineral Dust")
5 m.p.p.c.f.1 (Asbestos, as "Mineral Dust")
5 m.p.p.c.f.1 (Asbestos, as "Mineral Dust")
5 m.p.p.c.f.2 (Asbestos, as "Silicate Mineral and Nonmetallic Inorganic Dust") Dust")
5 m.p.p.c.f.2 (Asbestos, as "Silicate Mineral and Nonmetallic Inorganic Dust")
COMMENTS
Maximum Allowable Concentrations of Industrial Atmospheric Contaminants, Warren A. Cook, Industrial Medicine, November, 1945, pp. 936-946. Note: This is considered the precursor of the ACGIH TLV list.
^.p.p.c.f. means millions of particles per cubic foot of air. 1m.p.p.c.f. means as defined in 1954 comment. ^.p.p.c.f. means as defined in 1954 comment. 1m.p.p.c.f. means as defined in 1954 comment. ^.p.p.c.f. means as defined in 1954 comment. ^.p.p.c.f. means as defined in 1954 comment. 2m.p.p.c.f. means millions of particles per cubic foot of air based on impinger samples counted by light-field techniques. 2m.p.p.c.f. means as defined in I960 comment.
6113 21428
YEAR
TLV
1962
5 m.p.p.c.f.3 (Asbestos, as "Silicate Mineral Dust",less than 1% crystalline silica)
1963 1964 1965
5 m.p.p.c.f4 (Asbestos, as "Silicate Mineral Dust", less than 1% crystalline silica)
5 m.p.p.c.f4 (Asbestos, as "Silicate Mineral Dust", less than 1% crystalline silica)
5 m.p.p.c.f4 (Asbestos, as "Silicate Respirable Dust Evaluated by Count", less than 1% crystalline silica)
1966
5 m.p.p.c.f4 (Asbestos, as "Silicate Respirable Dust Evaluated by Count", less than 1% crystalline silica)
1967 1968
5 m.p.p.c.f4 (Asbestos, as "Silicate Respirable Dust Evaluated by Count", less than 1% crystalline silica)
5 m.p.p.c.f. (Tremolite, as "Silica Respirable Dust Evaluated by Count"
5 m.p.p.c.f.4 (Asbestos, as "Silicate Mineral Dust", less than 1% crystalline silica)**
5 m.p.p.c.f. (Tremolite, as "Silica Mineral Dust")
COMMENTS
3m.p.p.c.f. means millions of particles per cubic foot of air, based on the standard procedure for sampling and counting dusts adopted by the Fifth Annual Meeting of ACGIH (1942).
4m.p.p.c.f. means millions of particles per cubic foot of air, based on irapinger samples counted by light-field technics.
4m.p.p.c.f. means as defined in 1963 comment.
4m.p.p.c.f. means as defined in 1963 comment.
Notice of Intended Changes; Tremolite - 5 m.p.p.c.f
4m.p.p.c.f. means as defined in 1963 comment.
Notice of Intended Changes: Tremolite - 5 m.p.p.c.f.
4m.p.p.c.f. means as defined in 1963 comment.
4m.p.p.c.f. means as defined in 1963 comment.
**Notice of Intended Change: Asbestos: (a) 12 fibers/ml > 5|J in length as determined by the membrane filter method at 430X phase contrast magnification, or (b) 2 m.p.p.c.f. as counted by the standard impinger, lightfield count technique.
6113 21429
YEAR
TLV
1969 1970
5 m.p.p.c.f.4 (Asbestos, as "Silicate Mineral Dust", less than 1% crystalline silica)**
5 m.p.p.c.f. (Tremolite, as "Silicate Mineral Dust", less than 1% crystalline silica)
5 m.p.p.c.f.4 (Asbestos, all types, as "Silicate Mineral Dust", less than 1% crystalline silica)**
No value assigned (Tremolite, as "Silicate Mineral Dust", less than 1% crystalline silica, see asbestos).
1971
No value assigned (Asbestos, all types, as "Silicate Mineral Dust", less than 1% crystalline silica)**
No value assigned (Tremolite, as "Silicate Mineral Dust", less than 1% crystalline silica; see Talc, fibrous; use asbestos limit).
1972
No value assigned (Asbestos, all types, as Silicate Mineral Dust", <1% quartz)**
No value assigned (Tremolite, as "Silicate Mineral Dust", less than 1% crystalline silica; see Talc, fibrous; use asbestos limit).
COMMENTS
4m.p.p.c.f. means as defined in 1963 comment.
**Notice of Intended Changes: Asbestos: As defined for 1968.
4m.p.p.c.f. means as defined in 1963 comment.
**Notice of Intended Changes: Asbestos: 5 fibers/ml >5 y in length as determined by the membrane filter method at 430X magnification phase contrast illumination. Concentrations >5 fibers/ml, but not to exceed 10, may be permitted for 15-minute periods each hour up to five times daily.
**Notice of Intended Changes: Asbestos: 5 fibers/ml >5 y in length as determined by the membrane filter method at 400-45QX magnification (4 mm objective) phase contrast illumination. Concentrations 5 fibers/ml but not to exceed 10, may be permitted for 15-minute periods each hour up to five times daily.
**Notice of Intended Changes: Asbestos: 5 fibers/ml >5 y in length as determined by the membrane filter method at 400-450X magnification (4 mm objective) phase contrast illumination. Concentrations 5 fibers/ml but not to exceed 10, may be permitted for 15-minute periods each hour up to five times daily; Ala (human carcinogen).
6113 21430
YEAR
TLV
1973
No value assigned (Asbestos, all types, as "Silicate Mineral Dust", <1% quartz)*1*
No value assigned (Tremolite, as "Silicate Mineral Dust", <1% quartz; see Asbestos).
1974
1975 1976 1977 1978
5 fibers/cc >5 pm in length5; Ala (Asbestos, all forms, as "Silicate Minteral Dust", <1% quartz).
No value assied. (Tremolite as "Silicate Mineral Dust", <1% quartz; see Asbestos).
5 fibers/cc >5 pm in length5; Ala (Asbestos, all forms; and Tremolite, see Asbestos; as "Silicate Mineral Dusts", <1% quartz).
5 fibers/cc >5 pm in length5; Ala (Asbestos, all forms; and Tremolite, see Asbestos; as "Silicate Mineral Dusts", <1% quartz).
5 fibers/cc >5 pm in length5; Ala (Asbestos, all forms; and Tremolite, see Asbestos; as "Silicate Mineral Dusts", <1% quartz).
5 fibers/cc >5 pm in length6; Ala (Asbestos, all forms; and Tremolite, see Asbestos; as "Silicate Mineral Dusts", <1% quartz)**.
COMMENTS
**Notice of Intended Changes: Asbestos: 5 fibers/cc >5 p in length as determined by the membrane filter method at 400-450X magnification (4 mm objective) phase contrast illumination; Ala (human carcinogen). A more stringent TLV for crocidolite may be required.
sAs determined by the membrane filter method at 400-450X magnification (4 mm objective), phase contrast illumination; Ala (human carcinogen). A more stringent TLV for crocidolite may be required.
5Same comment as for 1974.
5Same comment as for 1974.
5Same comment as for 1974.
6As determined by the membrane filter method at 400-450X magnification (4 mm objective) phase contrast illumination; Ala (human carcinogen).
**Notice of Intended Changes:
Asbestos:
Amosite
0.5 fiber/cc, Ala
Crysotile 2.0 fibers/cc, Ala
Crocidolite 0.2 fiber/cc, Ala
Tremolite 0.5 fiber/cc, Ala
Other forms 2.0 fibers/cc, Ala
6113
YEAR
TLV
COMMENTS
1979
5 fibers/cc >5 pm in length6; Ala (Asbestos, all forms; and Tremolite, see Asbestos; as "Silicate Mineral Dusts", <1% quartz)**.
6Same comment as for 1978.
**Notice of Intended Changes: Asbestos: As defined for 1978.
1980
Amosite0.5 fibers>5pm/cc,Ala Chrysotile 2.0 fibers>5pm/cc,Ala Crocidolite 0.2 fiber>5pm/cc,Ala Other forms 2.0 fibers>5pm/cc,Ala (Asbestos, as "Silicate Mineral Dust, <1% quartz).
Human carcinogen.
1981
Same as for 1980.
Human carcinogen.
1982
Amosite 0.5 fiber >5(Jm/cc, Ala (12172-73-5) Chrysotile 2 fibers >5|Jm/cc, Ala (12001-29-5) Crocidolite 0.2 fiber >5pm/cc, Ala (12001-28-4) Other forms 2 fibers >5 |Jm/cc, Ala (Asbestos, as "Silicate Mineral Dust", <1% quartz)
Human carcinogen.
1983- 84 Amosite 0.5 fiber >5pm in (12172-73-5) length7, Ala Chrysotile 2 fibers >5pm in (12001-29-5) length7, Ala Crocidolite 0.2 fiber >5pm in (12001-28-4) length7, Ala Other forms 2 fibers >5pm in length7, Ala (Asbestos, as "Silicate Mineral Dust", <1% quartz)
Human carcinogen.
7As determined by the membrane filter method at 400-450X magnification (4 mm objective) phase contrast illumination.
1984- 85 Amosite 0.5 fiber/cc >5(Jm in (12172-73-5) length7, Ala Chrysotile 2 fibers/cc >5pm in (12001-29-5) length7, Ala Crocidolite 0.2 fiber/cc >5|Jm in (12001-28-4) length7, Ala Other forms 2 fibers/cc >5pm in length7, Ala (Asbestos, as "Silicate Mineral Dust", <1% quartz)
Same comments as for 1983-84.
6113 21432
1985-86
Amosite 0.5 fiber/cc8, Ala (12172-73-5) Chrysotile 2 fibers/cc8, Ala (12001-29-5) Crocidolite 0.2 fiber/cc?, Ala (12001-28-4) Other forms 2 fibers/cc8, Ala (Asbestos, as "Silicate and Other Dust", <1% quartz).
1986-87 Same as for 1985-86.
8As determined by the membrane filter method at 400-450X magnification (4 mm objective) phase contrast illumination for fibers longer than 5 (Jm and with an aspect ratio equal to or greater than 3:1; human carcinogen.
Same comments as for 1985-86.
Conversion
m.p.p.c.f. X 35.3 = particles/cc 1 cc = 1 ml 35.3 ft3 = 1 m3
Definition (1986-87)
Ala. Human Carcinogens. Substances, or substances associated with industrial processes, recognized to have carcinogenic or cocarcinogenic potential, with an assigned TLV.
6113 21433
1986 TEXAS CITY PLANT
FOLLOW-UP INDUSTRIAL HYGIENE PROGRAM EVALUATION
February 25-26, 1986
SDP591
L. W. O'Farrell S. D. Paul
6113 21434
INTRODUCTION
Background
Throughout Monsanto, there is a concerted effort to develop and maintain quality plant industrial hygiene programs to reduce employee exposure to chemical, physical, and biological agents which may produce adverse health effects. Plant IH programs reflect specific plant needs and are in various stages of development. DMEH has a responsibility to evaluate these programs on a continuing basis and to recommend elements or strategies that promote complete program development and maintenance.
Purpose
This 1986 Follow-up IH Evaluation Report presents the current status of the Texas City Plant response to comments and recommendations in the 1984 Follow-up IH Program Evaluation Report and includes other specific items as appropriate.
Scope
`
Recommendations are made to minimize the differences between current program capabilities and perceived plant needs. The following criteria were evaluated for the 1986 Texas City Plant IH program.
I. General Information II. Organization/Staffing and Budget III. Employee Education, Training, and Communication IV.Contractor Employees
V. Industrial Hygiene/Occupational Medicine Interface VI. Inventory Control of Chemical/Physical Agents VII. Exposure Assessment VIII. Monitoring Data Integrity
IX.Engineering Control Implementation and Evaluation X. Data Handling and Reporting
XI.Hearing Conservation Program XII. Respiratory Protection Program XIII. Personal Protective Equipment Program XIV. Radiation and Heat Stress
XV.Hygiene Facilities and Practices XVI. Emergency Response
EXECUTIVE SUMMARY
The 1986 follow-up IH evaluation generally indicates that the overall plant program is very good. Technical program aspects are typically handled very well. Communications, training, and participative aspects have significantly improved since 1984. A desirable goal in the near future is to find a way to administer the program while providing ample time to remain visible in the plant on a routine basis. The two roles are often at odds
SDP591
6113 21435
and may make the industrial hygienist uncomfortable with overall performance in both phases of the job. There is no question, however, that May Caban has done an excellent job.
In the near future, principal thrust areas should include hazard communication, employee training, exposure assessment (e.g., benzene) and respiratory protection. This is based on new or proposed regulatory changes and the impact of these changes on plant operating personnel.
The recommendations in this report are prioritized to assist you to identify the areas to address first. Priority I recommendations should be addressed immediately. Priority II recommendations should be addressed within 6 months. Priority III recommendations should be addressed within 12 months. Priority IV recommendations should be addressed within 24 months.
The recommendations are intended to be specific enough to provide definition, but general enough not to restrict the approach to problem solving.
Some of the recommendations suggest that an integrated approach be used to respond to this report. It will be helpful to consider such an approach when appropriate.
COMMENTS/RECOMMENDATIONS
The following comments present a status of the Texas City Plant IH program at the time of the evaluation. The recommendations are intended to be used to identify future industrial hygiene action areas.
SDP591
6113 21436