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Technical Assistance Report TA 80-49, Defense Logistics Agency Headquarters, Defense Personnel Support Center, Philadelphia, Pennsylvania.

PB81114126

Publication Date	1980
Personal Author	Lewis, F. A.
Page Count	8
Abstract	The air landing machine room and the ventilation system in use at the Defense Logistics Agency (SIC-9711) Health Clinic and Inspector General's Office in Philadelphia, Pennsylvania were evaluated to determine potential exposure to asbestos (1332214). A walk through survey and bulk residue sampling were conducted on April 3 and 25, 1980 at the request of the Agency. Improper removal of asbestos insulation from an old ventilator was identified as a potential source of asbestos contamination; fibers may have entered the new ventilation system and could expose over 5,500 personnel to asbestos within 1 year. Analysis by polarized light and electron microscopy revealed that 10 to 30 percent of the bulk samples were chrysotile asbestos (12001295), in the form of free fibers and large chunks of material. The current OSHA asbestos exposure standard for an 8 hour time weighted average is 2.0 fibers per cubic centimer for greater than 5 microns in length, but the authors note that there is no truly safe exposure limit for asbestos. They conclude that a hazard would exist if the new air system at the clinic is put in operation. They recommend a through cleaning of the room and the ventilation system, followed by an appropriate air monitoring program.
Keywords	Hazardous materials Industrial medicine Environmental surveys Protection Asbestos Exposure Toxicity Criteria Inspection Standards Recommendations Industrial hygiene Concentration(Composition) Thresholds(Physiology) Dust Minerals Risk Carcinogens Contaminants Ventilation Toxic substances Occupational safety and health Air sampling Maximum permissible exposures CAS 1332-21-4 CAS 12001-29-5
Source Agency	National Institute for Occupational Safety and Health
NTIS Subject Category	57U - Public Health & Industrial Medicine 94D - Job Environment 68G - Environmental Health & Safety
Corporate Authors	National Inst. for Occupational Safety and Health, Cincinnati, OH. Health Hazard and Technical Assistance Branch.
Document Type	Technical Report
Title Note	Hazard evaluation rept.
NTIS Issue Number	198103

Technical Assistance Report TA 80-49, Defense Logistics Agency Headquarters, Defense Personnel Support Center, Philadelphia, Pennsylvania.

Technical Assistance Report TA 80-49, Defense Logistics Agency Headquarters, Defense Personnel Support Center, Philadelphia, Pennsylvania.
PB81114126

Publication Date	1980
Personal Author	Lewis, F. A.
Page Count	8
Abstract	The air landing machine room and the ventilation system in use at the Defense Logistics Agency (SIC-9711) Health Clinic and Inspector General's Office in Philadelphia, Pennsylvania were evaluated to determine potential exposure to asbestos (1332214). A walk through survey and bulk residue sampling were conducted on April 3 and 25, 1980 at the request of the Agency. Improper removal of asbestos insulation from an old ventilator was identified as a potential source of asbestos contamination; fibers may have entered the new ventilation system and could expose over 5,500 personnel to asbestos within 1 year. Analysis by polarized light and electron microscopy revealed that 10 to 30 percent of the bulk samples were chrysotile asbestos (12001295), in the form of free fibers and large chunks of material. The current OSHA asbestos exposure standard for an 8 hour time weighted average is 2.0 fibers per cubic centimer for greater than 5 microns in length, but the authors note that there is no truly safe exposure limit for asbestos. They conclude that a hazard would exist if the new air system at the clinic is put in operation. They recommend a through cleaning of the room and the ventilation system, followed by an appropriate air monitoring program.
Keywords	Hazardous materials Industrial medicine Environmental surveys Protection Asbestos Exposure Toxicity Criteria Inspection Standards Recommendations Industrial hygiene Concentration(Composition) Thresholds(Physiology) Dust Minerals Risk Carcinogens Contaminants Ventilation Toxic substances Occupational safety and health Air sampling Maximum permissible exposures CAS 1332-21-4 CAS 12001-29-5
Source Agency	National Institute for Occupational Safety and Health
NTIS Subject Category	57U - Public Health & Industrial Medicine 94D - Job Environment 68G - Environmental Health & Safety
Corporate Authors	National Inst. for Occupational Safety and Health, Cincinnati, OH. Health Hazard and Technical Assistance Branch.
Document Type	Technical Report
Title Note	Hazard evaluation rept.
NTIS Issue Number	198103