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Industrial Hygiene Survey Report, P. D. George Company, St. Louis, Missouri, February 22-25, 1988,

PB89164693

Publication Date	1988
Personal Author	Boeniger, M. F.
Page Count	18
Abstract	In an attempt to gather information related to employee exposure to 4,4'-methylenedianiline (101779) (MDA) in a batch type mixing operation, a visit was made to the P. D. George Company (SIC-3079), St. Louis, Missouri. At this site imide ester resin was manufactured for wire coating. The process was performed as a batch operation in which large amounts of pure MDA were used. The study indicated that airborne dust was generated during the dumping of MDA into the reactor's loading chute but that personal protection eliminated much of the respiratory hazard. Contamination of the workplace and poor work practices both probably resulted in dermal exposure, but this was not confirmed by actual measurement. Urine samples were all negative for MDA at the detection limits of 1.0 parts per billion, suggesting that exposures were not sufficient to be detected by this method. The authors recommend that decontamination procedures be implemented and performed after MDA is used. Dry cleanup should be performed with a vacuum installed with a HEPA filter and final decontamination should be performed with a methanolic solution of p-dimethylaminobenzaldehyde. Workers must wear full personal protective equipment while handling MDA. These garments must not be reworn or stored with street clothes. Workers should wash and shower after handling MDA.
Keywords	Environmental surveys Industrial medicine Plastics industry Exposure Toxicity Inspection Hazardous materials Dust Airborne wastes Safe handling Materials handling Protectors Mixing Toxic substances Occupational safety and health CAS 101-77-9 Region 7 SIC 3079 4,4'-methylene dianiline Airborne pollutants
Source Agency	National Institute for Occupational Safety and Health
NTIS Subject Category	57U - Public Health & Industrial Medicine 57Y - Toxicology 94D - Job Environment 41I - Job Environment 68G - Environmental Health & Safety 68A - Air Pollution & Control
Corporate Authors	National Inst. for Occupational Safety and Health, Cincinnati, OH. Industrywide Studies Branch.
Document Type	Technical Report
NTIS Issue Number	198912

Industrial Hygiene Survey Report, P. D. George Company, St. Louis, Missouri, February 22-25, 1988,

Industrial Hygiene Survey Report, P. D. George Company, St. Louis, Missouri, February 22-25, 1988,
PB89164693

Publication Date	1988
Personal Author	Boeniger, M. F.
Page Count	18
Abstract	In an attempt to gather information related to employee exposure to 4,4'-methylenedianiline (101779) (MDA) in a batch type mixing operation, a visit was made to the P. D. George Company (SIC-3079), St. Louis, Missouri. At this site imide ester resin was manufactured for wire coating. The process was performed as a batch operation in which large amounts of pure MDA were used. The study indicated that airborne dust was generated during the dumping of MDA into the reactor's loading chute but that personal protection eliminated much of the respiratory hazard. Contamination of the workplace and poor work practices both probably resulted in dermal exposure, but this was not confirmed by actual measurement. Urine samples were all negative for MDA at the detection limits of 1.0 parts per billion, suggesting that exposures were not sufficient to be detected by this method. The authors recommend that decontamination procedures be implemented and performed after MDA is used. Dry cleanup should be performed with a vacuum installed with a HEPA filter and final decontamination should be performed with a methanolic solution of p-dimethylaminobenzaldehyde. Workers must wear full personal protective equipment while handling MDA. These garments must not be reworn or stored with street clothes. Workers should wash and shower after handling MDA.
Keywords	Environmental surveys Industrial medicine Plastics industry Exposure Toxicity Inspection Hazardous materials Dust Airborne wastes Safe handling Materials handling Protectors Mixing Toxic substances Occupational safety and health CAS 101-77-9 Region 7 SIC 3079 4,4'-methylene dianiline Airborne pollutants
Source Agency	National Institute for Occupational Safety and Health
NTIS Subject Category	57U - Public Health & Industrial Medicine 57Y - Toxicology 94D - Job Environment 41I - Job Environment 68G - Environmental Health & Safety 68A - Air Pollution & Control
Corporate Authors	National Inst. for Occupational Safety and Health, Cincinnati, OH. Industrywide Studies Branch.
Document Type	Technical Report
NTIS Issue Number	198912