6BL220F7 tisfims moa, 6696USS Or. treiag J.

J7 .MIL-I-2781C sjFjtjct&ie/ 'f&d MIL-I-2781B 3 September 1964 MILITARY SPECIFICATION CCUIATTCaTPIPE'COVERING,' THERMAL n^g specification tea been approved by the Department at Defease tad is mandatory for use by Use Departments of the Army.the Navy, sod the Air Force. 1.

John Vyvarberg Your Memo 3/20/69 Asbestos Worker* Action Co San Fibrous Clast In A/C Systess t ii -tnmrm -sa.r 3Y srar it cq. ?

3C- -*-2 1 * wt Ns ll,K N I N .

Industrial Hygiene Digeat September, 1966 836 The Evaluation of Physical Tasks in Industry.

Industrial Hygiene Digest October. 1*166 1 002 Tests for Effect of Asbestos on Benzo(a) Pyrene.

< '>* OO C=3 Industrial Hygiene Digest February, 1 PHYSICAL ASPECTS OF THE ENVIRONMENT 1 92 Long-Term Study Relating Temporary and Permanent Hearing Loss.

National Fire Protection Association, 60 Battervmarch St, Boston, Mass 02110 Bulk Oxygen Systems at Consumer Sites, Standard No 566 Cleaning or Safeguarding Small Tanks and Containers, Standard No 327 Control of Cas Hazards on Vessels To Be Repaired, Standard No 306 Cutting and Welding Processes, Standard No 51B National Electrical Code, Standard No 70 Oxygen Fuel-Gas Systems for Welding and Cutting, Standard No 51 National Safety Council, 425 North Michigan Ave , Chicago, 111 60611 Industnal Data Sheets Acetylene, 494 Gas-Shielded Arcs and Plasma Jet Torches, 552 Gaseous Oxygen, 472 Hand Soldering and Brazing, 445 Hot Work Permits (Flame or Spark), 522 Solon, Leonard R "Occupational Safety with Laser (Optical Maser) Beams '' Archives of Environmental Health, 6 414-17 (March 1963) U S Navy, The Pentagon Washington, D C 20350 Bureau of Ships Manual Chapter 92, "Welding and Allied Processes " NAVSH1PS 25000-92 Underwater Cutting and Welding Manual NAVSHIPS 250-692-9 947

eHcfat-j(/ea/utfAou4e ELYRIA I INSTRUCTION & SERVICE DM OHIO DD3 SAFETY ACTUATOR DESCRIPTION r-t HU Safety Actuator; CD describes the double dia phragm and the suffix 3 denotes the triple action for service, parking and emergency braking.

Industrial Noise Threshold limit values for physical agents for 1969 These threshold limit values refer to levels of physical agents and represent conditions under which it is believed that nearly all workers may be repeatedly exposed day after day without adverse effect Because of wide variations m individual susceptibility, ex posure of an occasional individual at, or even below, the threshold limit may not prevent annoyance, aggravation of a pre-existing con dition, or physiological damage Threshold limit values refer to levels of exposure for a 8-hour workday for a 40-hour work week Exceptions are those limits which are given a ceiling value (C) They should be used as guides in the control of health hazards and should not be used as fine lines between safe and dangerous levels of exposures These threshold limits are based on the best available information from industrial experience, from experimental human and animal studies, and when possible, from a combination of the three These limits are intended for use in the practice of industrial hygiene and should be interpreted and applied only by a person trained in this discipline They are not in tended for use, or for modification for use, (a) in the evaluation or control of the levels of physical agents in the community, (b) as proof or disproof of an existing physical dis ability, or (c) for adoption by countries whose working conditions differ from those in the USA These values are reviewed annually by the Committee on Threshold Limits for Physical Agents for revisions or additions, as further information becomes available Ceiling value There are some physical agents which produce physiological response from short intense exposure and whose threshold limit is more appropriately based on this particular response Physical agents with this type of response are best controlled by a ceiling "C" limit which is a maximum level of exposure which should not be ex ceeded Notice of intent At the beginning of each year, proposed actions of the Committee for the forthcoming year are issued in the form of a "Notice of Intent " This notice provides not only an opportunity for comment, but solicits suggestions of physical agents to be added to the list The suggestions should be accompanied by substantiating evidence As Legislative code.

PATENT SPECIFICATION DRAWINGS ATTACHED.

KErXSSiCES 1.

MONTREAL STAR.

4 TOi C.

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