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Sj\FSTY ENGINEERING - INDUSTRIAL HYGIENE - FIRE PROTECTION
ASBESTOS
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GENERAL
'INDUSTRIAL HYGIENE PART 3
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z PLAINTIFFS I EXHIBIT 1 RMC-284
Material is a fibrous hydrated magnesium silicate. OSHA Standard 1910.93a governs exposure.:Jr/
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^INHALATION
The Threshold Limit Value (TLV) is 5 fibers per ml greater than
5 microns in length. This value was established in OSHA
Standard 1910.93a. Somewhat higher.levels are permitted for
short periods of time, but the goal should be to maintain all
exposures below 5 fibers per ml..
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Asbestos is the cause of the serious lung'disease, asbestosis.
There is increasing evidence.that excessive exposure causes r
lung cancer.
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Engineering means must be used to control .exposure. Methods
such as enclosure, vacuum sweeping, and local exhaust ventilation *
are emphasized.
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Where engineering methods are not feasible or do not otherwise reduce exposure to an acceptable level, respiratory protective equipment must be used. The type used depends on the air con
centration of dust, as follows:
1. A dust respirator approved tinder the U. S. Bureau of
Mines Schedule 21B for an atmosphere containing not
more than 25 fibers per ml. .. y-.; y.;/
2. A powered filter positive pressure respirator approved
under the U. S. Bureau of Mines Schedule 21B for an atmosphere containing not more than 250 fibers per ml.
3* A type C positive pressure supplied-air respirator approved under the U. S. Bureau of Mines Schedule 19B for an atmosphere containing more than 250 fibers per . ml. -
5/1/72
002515
TXTINER RMC008S132
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SAFETY ENGINEERING - INDUSTRIAL HYGIENE - FIRE PROTECTION
INDUSTRIAL HYGIENE PART 2
HEALTH MAINTENANCE
IV. FREE SILICA - ASBESTOS - MICA - SUBMICRON SILICAS AND RELATED SUBSTANCES
k4 Type of Test
l4M by 17" PA and Lateral chest X-ray. Can be taken and interpreted at any general hospital or reputable private radiological consulting service.
B*. Type of Exposure. Long-standing chronic exposure.
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C. Frequency of Tes^
1. Preplacement 2. Every six months while working in area. 3- Every year for three years after last employment
in exposed area.
D. Interpretation
Any chronic changes in X-rays should constitute removal from dusts of the above substances.
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Vl/71
TXTINER RMCQ086133
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002516
SAFETY ENGINEERING - INDUSTRIAL HYGIENE - FIRE PROTECTION
ASBESTOS (continued)
INDUSTRIAL HYGIENE PART 3
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Employees who are overexposed when spraying asbestos or during demolition of pipes, structures, or equipment covered with asbestos shall be provided with a type C positive pressure supplied-air respirator approved by the TJ. S. Bureau of Mines ' under Schedule 21B.
'When exposure to dust exceeds the TLV, and the exposure is from hand or power operated tools, such tools shall be provided with local exhaust ventilation and dust collectors.
SKIN CONTACT
No hazard.
EYE CONTACT
Foreign body reaction.
INGESTION
No hazard.
FIRE HAZARD
No hazard.
SPECIAL PROVISIONS
1. Asbestos cement,sorter, coatings, grout, and plaster shall be mixed in closed bags or other containers.
2. Asbestos waste and scrap shall be collected and disposed of in sealed bags or other containers.
5/1/72
TX TIMER
RMC00881M
002517
SAFETY ENGINEERING - INDUSTRIAL HYGIENE - FIRE P?.f-TECTION
INOJSTBIAL HYGI_*\S
PAKI 3
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ASBESTOS (continued)
3. All cleanup of asbestos dust and bloving shall be
. .. performed by vacuum cleaners*"...?"
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. 4.* .No dry .sweeping shall be performed.
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HEALTH MAINTENANCE:
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002518
TXTINER RMC0086135