Document 4aea38w2xNQZpqxX8YmNwrMbp

From JOE DAMIANO PITTSBURGH OFFICE - 6 To DR. r JAFFE PITTSBURGH OFFICE - 6 1993 March 29 RE: HAZARDOUS MATERIALS IN ALCOA Here is a list of the hazardous materials common to many Alcoa operations meeting the following criteria: * Exposures can exceed 10-30% of the PEL. * Exposures can occur via skin contact and absorption. * The material is a sensitizer. * The material is a commonly accepted carcinogen or reproductive toxin. Table 1 is not all inclusive. Nevertheless, I believe Table 1 covers 90-95% or more of the significant exposures in Alcoa. JOE DAMIANO /pdn cc: R. M. James, Pittsburgh - 6 0 ALCOA 794960 0041 TABLE 1 HAZARDOUS MATERIALS IN ALCOA * Total and respirable dust, present as aluminum, aluminum oxide, magnesium, magnesium oxide and bauxite * Coal tar pitch volatiles * Asbestos...historical exposures * Man-made mineral fibers, including refractory ceramic fibers, fiberglass, rock wool, slag wool * Glycol ethers... skin absorption concern, present in many coatings. This category includes 2-methoxyethanol, 2methoxyethyl acetate ester, 2-ethoxyethanol, 2-ethoxyethanol acetate ester, 2-butoxyethanol, 2-butoxyethyl acetate * Lead....primarily associated with demolition of structural steel * Chromium IV: metal treatment operations * Silica... quartz and cristobalite in refractories * Fluorides: Particulate fluoride (exposure via inhalation, ingestion)..smelters and aluminum fluoride plants * Hydrogen fluoride and sulfur dioxide...present in potroom, concurrent exposures to fluoride dust and alumina * Welding emissions...ozone, iron oxide, copper, nickel, chromium (III & IV), manganese, molybdenum, and zinc * Isocyanates...primarily associated with spray painting operations and some use of polyurethane foam. This category includes TDI, MDI, and HDI. * Formaldehyde...arising from lubricant pyrolysis and component of some coatings * Chlorine and hydrogen chloride....primarily associated with molten metal fluxing * Lubricant emissions: Aliphatic hydrocarbons, perhaps containing condensed ring aromatic products of pyrolysis...occurring as a vapor and mist. The lubricants include mineral spirits, naptha, haxane, Stoddard solvent, kerosene, and many Alcoa formulated mixtures with special additives. 794960 0042 TABLE 1 (Continued) HAZARDOUS MATERIALS IN ALCOA Few/sinqle location exposures: * Organic solvent vapors associated with coating operations. Peak exposures to mixtures may approach or exceed short-term limits during mixing or clean-up. Some solvents absorbed through the skin; glycol ethers are the major concern. * Beryllium...alloying metal * Carbon monoxide...Soderberg potrooms, etc. * Wood dust...window manufacturing, box shops, etc. * Epoxy resins, 4,4 methylene dianiline and methylene chloride in Alcoa Composites (Monrovia, Ca). * Vanadium pentoxide....machining titanium forgings in Cleveland * Ammonia....magnesium slag off gas * Coal dust...power generation 794960 0043 Joe Damiano Jo l ALCOA 1501 Alcoa Building Pittsburgh, PA 15219 794960 0044 To: Dr. Dan Jaffe Pittsburgh 06 From: Joe Damiano Pittsburgh 06 1993 March 29 Re: Hazardous Materials in Alcoa Here is a list of the hazardous materials common to many Alcoa operations meeting the following criteria: Exposures can exceed 10 to 30% of the PEL. Exposures can occur via skin contact and absorption. The material is a sensitizer. The material is a commonly accepted carcinogen or reproductive toxin. Table 1 is not all inclusive. Certainly some materials have not been listed that maybe present at significant levels in a single or perhaps a several locations. Nevertheless, I believe Table 1 covers 90 to 95% or more of the significant exposures in Alcoa. Joe Damiano med3.jd 794960 0045 TABLE 1 HAZARDOUS MATERIALS IN ALCOA * Total and respirable dust, present as aluminum, aluminum oxide, magnesium, magnesium oxide and bauxite. * Coal tar pitch volatiles. * Asbestos...historical exposures. * Man made mineral fibers, including refractory ceramic fibers, fiberglass, rock wool, slag wool. * Glycol ethers... skin absorption concern, present in many coatings. This category includes 2-methoxyethanol, 2methoxyethyl acetate ester, 2-ethoxyethanol, 2-ethoxyethanol acetate ester, 2-butoxyethanol, 2-butoxyethyl acetate. * Lead....primarily associated with demolition of structural steel. * Chromium IV: metal treatment operations. * Silica...quartz and cristobalite in refractories. * Beryllium...alloying metal. * Fluorides: Particulate fluoride (exposure via inhalation, ingestion)..smelters and aluminum fluoride plants. * Hydrogen fluoride and sulfur dioxide...present in potroom, concurrent exposures to fluoride dust and alumina. * Welding emissions...ozone, iron oxide, copper, nickel, chromium (III & IV), manganese, molybdenum, and zinc. * Isocyanates...primarily associated with spray painting operations and some use of polyurethane foam. This category includes TDI, MDI, and HDI. * Formaldehyde...arising from lubricant pyrolysis and component of some coatings. * Chlorine and hydrogen chloride....primarily associated with molten metal fluxing. * Carbon monoxide...Soderberg potrooms, etc. * Wood dust...window manufacturing, box shops, etc. 794960 0046 * Lubricant emissions: Aliphatic hydrocarbons, perhaps containing condensed ring aromatic products of pyrolysis...occurring as a vapor and mist. The lubricants include mineral spirits, naptha, haxane, Stoddard solvent, kerosene, and many Alcoa formulated mixtures with special additives. Few/ single location exposures: * Organic solvent vapors associated with coating operations. Peak exposures to mixtures may approach or exceed short term limits during mixing or clean-up. Some solvents absorbed through the skin; glycol ethers are the major concern. * Epoxy resins, 4,4 methylene dianiline and methylene chloride in Alcoa Composites (Monrovia, Ca). * Vanadium pentoxide....machining titanium forgings in Cleveland * Ammonia....magnesium slag off gas. * Coal dust...power generation med3.jd 794960 0047