Document V7peqQyow8mODwo9NwwgVzQ4
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EXHIBIT
I- SH-340
DRAFT
ASBESTOS SHELL & REGULATORY HISTORY
1946 1968 1969
1971
1971 1971 .i,. t
1972 1972 1972' 1972 1972
1972
ACGIH established MAC'S (Maximum Allowable Concentrations) MAC for asbestos was 5 mppcf. This was a guideline for IH
professionals, not a regulation or standard.
ACGIH Notice of Intended Change to 12 f/ml >5um length or 2 mppcf (note: mppcf to f/ml conversion uncertain)
(5/20) Walsh-Healey Public Contracts Act
_
Established asbestos standard of 12 f/cc, >5 um length (TWA)
or 2 mppcf. Walsh-Healey dealt with governmental contract work.
Adopted TLV's at the time of Act.
(May) ACGIH Notice of Intended Change for TLV to 5 f/cc >5um length Concentrations >5 f/ml but not to exceed 10 f/ml may be permitted
for 15 min periods each hour up to five times daily.
(12/7) (29 CFR 1910.93a) OSHA Emergency Temporary Standard for Asbestos 5 f/cc, >5 um length, TWA and 10 f/cc ceiling limit
"
(12/7) OSHA PROGRAM DIRECTIVE #6 ASBESTOS DUST, EMERGENCY STANDARD IMPLEMENTATION
NIOSH CRITERIA DOCUMENT OCCUPATIONAL EXPOSURE TO ASBESTOS HSM72 -10267 Recommended 2.0 f/cc (>5 um length) 8hr TWA, no peak concentration greater then 10 f/cc (>5 um length), max time of 15 minutes.
(2/11) API letter to OSHA re comments on NPR on asbestos
(2/23) OSHA SAMPLING DATA SHEET #2
ASBESTOS
(6/12) Memo: MGR IH, HO to DISTR.LIST OSHA ASBESTOS STANDARD Effective 7/7/72, 29 CFR 1910.1001
(6/15) Memo: MEDICAL DIRECTOR, Public Affairs PERM. OSHA STDS for ASBESTOS EXPOSURE, MEDICAL REQUIREMENTS
(6/21) Memo: Mgr - DOSH, HO re: OSHA 1910.93a ASBESTOS STD (first general industry std to be promulgated which did not originate as national consensus std) Memo provided brief list of requirements & Shell responsibility.
(6/29) Memo: Mgr DOSH, HO to DISTR. ASBESTOS STD (by 12/7/72 every workplace where fibers are released must be monitored.
ASBESTOS HISTORY
ABS-059078
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1972
1972 1972 1972
1972
1972 1973 1973
1974
1974 '
1976 1976
1976 1984 1984
(7/7) OSHA ASBESTOS STANDARD, EFFECTIVE DATE 29CFR 1910.1001 Exposure limit to 5 f/cc, >5 um length and then reduced to 2 f/cc on 7/1/76, no ceiling limit set
(9/1) Memo: Medical Director, PA to DISTR.LIST OSHA ASBESTOS STD. Response to Q's concerning the OSHA std.
(9/7) MGR-IH, HO to DISTR.LIST
'
ASBESTOS STD Re: Survey to characterize employee exposures.
(10/12) Memo: GM-Manufacturing to Location Managers DOL/OSHA ASBESTOS EXPOSURE STANDARD. (tests req. by 12/7/72, medicals w/ exposed employees, 1/31/73).
started by
(11/13) Memo: Med. Dir. & MGR IH to DISTR. LIST Definition of "Exposed" in OSHA STANDARDS. (Discussion of meaning of exposure)
(12/1) Memo - MGR-IH, HO to DISTR.LIST ASBESTOS (guidance on sampling - shipping samples)
"
(5/29) API Memo to Comm on Medicine & Env. Health Collaborative study of Microscopic Counting of Asbestos Samples
(12/4) Memo, Med. Dir & MGR IH to LIST CALIFORNIA OSH REGS ON ASBESTOS Re: Medical exams, >1 f/cc, >5 cc length
(1/4) Memo GM Refining-HO to REFINERY MGRS OSHA ASBESTOS STD, Medical Exam (additional guidelines & new exam form)
(3/5) Memo, GM-Chemical Plants & Refineries to Refinery Managers
OSHA ASBESTOS STD AIR MONITORING PROGRAM
.
(median asbestos counts from 1st round generally < below 5 f/cc,
Peak counts were well below the 10 f/cc limit)
(2/3) Memo DOSH TO list OSHA REV. COMM CASE (GAF & VE C ON ASBESTOS)
(12) NIOSH REVISED RECOMMENDED ASBESTOS STANDARD DHEW (NIOSH) PUBL NO 77-169 Recommends 0.1 f/cc 8hr TWA and 0.5 f/cc for peak
(7/1) OSHA asbestos standard of 2 f/cc 8hr TWA became effective. Ceiling limit of 10 f/cc >5 um length, max time of 15 minutes.
(4/12) Memo MGR, EC-M&T to DISTR AMENDMENTS TO NEHSAP for ASBESTOS (4/5/84)
(9/14) Memo: Mgr H&S, M&T to DISTR.LIST ASBESTOS VS NON-ASBESTOS GASKETS
ASBESTOS HISTORY
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986
(6/20) OSHA revises the asbestos standard to 0.2 f/cc, but does not issue a short term exposure limit.
1988
(9/14) OSHA amends the asbestos standard by adding an excursion limit of 1 f/cc averaged over a sample time of 30 minutes.
1989+ OSHA announced other proposed changes,made some changes in the standard but did not change the exposure limits.
CFP 9/3/91 - 1
ASBESTOS HISTORY
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