Document VdXyKxYOdanm6g6O1Jm3R7n4

TOUR W0R19 OF RROTFCIIOR /< Texas EmPLOYeRs1 insuRance Associanon POST OFFICE BOX 2753 | DALLAS, TEXAS 75221 June 16, 1976 Mr. E. Brooks Parker Works Environmental Engineer Aluminum Company of America P. O. Box.li72 . . Rockdale, Texas 76^67 'v________________< Dear Brooks: ' The attached outline covers the main topics suggested for the 2 hour session. For portions of the discussions, a script has been drafted so that the final presentation could be "text" type material. The material being sent may not yet be in the form we need before making a presentation to plant management. This is part of what probably should be discussed if not by telephone, then by another meeting. Specifically I am not quite sure when to include the specific departmental exposures discussion, and still maintain a continuity of purpose in presenting the . basic industrial hygiene concepts. I don't recall the exact date that you and Kelson will be out, but I will call during the week of June 21 in order to coordinate our efforts. Sincerely, cc: H. K. Mueller Clarence Kunse, Austin Engineering ARD 001886 EMPLOYERS INSURANCE OF TEXAS: Texas Employers* Insurance Association | Employers Casualty Company j Employers National Insurance Company | Employers National Life Insurance Company I. General A. Definitions 1. Industrial Hygiene 2. Environmental Health 3. Occupational Health * B. Relationship of Safety and Industrial Hygiene C. Emphasis of Recognition, Evaluation, Control . II. Recognition of Health Hazards A. Source of Exposures 1. Knowledge of plant or departmental process 2. Knowledge of materials used 3. Knowledge of how materials (raw, products, by-products, etc.) are used - (transfer conveyors, grinding, mixing, heating) ii. Determine points or location most likely to cause emission of contaminants B. Types of Environmental Exposures - Different characteristics assist in describing potential hazards. . 1. Chemicals - general effects a. Liquids i. Acids ii. Solvents iii. Caustics iv. Oils ARD 001887 b. Mists i. Suspension in air of very small liquid droplets usually generated by condensation from gaseous to .. liquid state or by mechanical action such as breaking up a liquid by splashing, foaming op atomizing e.g. Oil mist, acid mist from electroplating ii. Hazard increase because of small particle more suitable for inhalation iii. Skin contact increase over vapors . c. Dusts % i. Solid particles generated by handling, crushing, grinding, etc. e.g. silica, asbestos, cotton - pneumoconiosis dusts; lead, manganese, cadmium - systemic poisons; Portland cement, gypsum, limestone - nuisance dusts ii. Toxic properties of individual materials iii.Effect of particle size d. Fumes i. Volatilized solids which cool from gaseous state to condense as fine solid particles e.g. molten metalsj "metal fume fever" ii. Toxic properties of fumes generally iii.Toxic effect of specific f ARD 001888 e. Valors i. Gaseous forr. of a substance that is usually a liquid or s clid , e,r. Solvent vapors f. Cases i. Formless state of matter, not normally a liquid or solid, which will diffuse and occupy all available space e.r. combustion rases - carbon mono::ice, nitropen - diowide, sulfur dioxide, hydroren sulfide, ozone. Physical Factors a. Koise - Discussion on differences between i. Gradual loss of hearinp ii. Traumatic iii. Disease caused b. Heat i. Environmental heat ii. Ccntrct with hot materials ARD 001889 3. Ergonomic a. People-machine orientation HI. Health Hazards-Evaluation Factors A. Severity 1. Concentration 2. Toxicity 3. Duration E. Modes of entry - How is body attacked? 1. Skin a. Skin damage directly b. Absorption through skin 2. Ingestion ' a. Damage through swallowing b. Inhalation by swallowing 3 Inhalation a. Natural defenses of respiratory system b. Effect of particle size, physical characteristics c. General effect of chemicals such as solvents - including simple symptoms C. Units - Threshold Limit Values Threshold limit values are time-weighted average atmospheric concentrations of substances to which nearly all workers may be repeatedly exposed, day after day, without significant dis comfort or impairment of health. ARD 001890 1. Analysis of definition . a. "...time-weighted average..." - based on an eight hour day, forty hour work week; excursion values b. "...atmospheric concentrations..." - based solely on in halation r c. "...nearly all'workers..." - individual susceptibility; health workers d. "...repeatedly exposed..." - chronic exposure, eight hour day, etc. e. "...without significant discomfort or impairment of health..." basis for establishing a TLV for a specific substance 2. Criteria for establishing TLV's a. Animal experiments ' b. Human experiments c. Industrial experience * 3. Expression of concentration a. Milligrams per cubic meter of air (mg/itP) - concentration by weight b. Parts of contaminant per million parts of air (ppm) concentration by volume c. Miscellane ous i. M.P.P.C.F. - million particles per cubic foot of air ii. % - percent - conversion of ppm to % 1 1% c 10,000 ppm k* Examination of the TLV list i ARD 001891 IV. DEPARTISUTAL EXPOSURES ARD 001892 1. Carbon and coke dust 2. Fluorides 3. Pitch fumes h. Alumina dust . Oil Mist 6. Noise 7. Heat 8. Vehicle Exhaust 9. Metal fumes 10. Metal - Iron 11. Metal - Silicon 12. Metal - Manganese 13. Radiation Electric Arc lli. Copper 1$. Carbon monoxide 16. Methyl Naphthaline 17. Asbestos 18. Magnetic Fields 19. Chlorine 20. Oxygen 21. Slag or Skim dust 22. Castor oil 23. HC1 (acid) 2ii. Aluminum 2J. Inert gas Carbon Plant Rod Roon Potroorns Ingot Atomizer X X X X X X_ X X X X X X X X X X X X X X XXX XXX XX X X X X X X XX X X X X ARD 001893 CARBON PLANT 1. Carbon and coke dust 2. Fluorides 3. Pitch fumes Alumina dust 5 Oil mist 6. Noise 7. Heat 8. Vehicle exhaust fumes ARD 001694 RODDING ROOM 1. Koise ' 2. Metal fumes from Lectromelt cast iron melting operation 3. Metals include iron, silicon, and manganese U. Radiation from Lectromelt furnace (electric arc melting) 5. Heat * 6. Copper dust from abrasive blasting of anode rods 7. Vehicle exhaust fumes ARD 001695 POTROCMS 1. Fluorides 2. Carbon monoxide 3. Alumina dust U. Noise Heat V ' 6. Methyl naphthalene-solvent used in potlining seam mix and in cleaning of bus joints 7. Pitch fumes--potlining operation 8. Asbestos--when dumping spent potlining containing asbestos insulation 9. Magnetic field? 10. Vehicle exhaust fumes ARD 001Q96 Inpot Plant and Properzi Rod Kill Area 1. Koise 2. Chlorine ' 3. Qxypene ll. Furnace skin dust--contains oxides, chlorides, and nitrides of metals involved. These metals include Al, Si,tFe, Cu, 1-In, Mg, Zn, Ti, B, Ee, Cr, and possibly Co. 5. Castor oil 6. Hydrochloric acid and muriatic acid 7. Vehicle exhaust.fumes 8. Heat? i ARD 001897 ATOMIZER 1. Noise 2. Aluminum powder ' 3. Inert pas from inert pas peneratcrs Iu Furnace skim dust 5>. Heat? ARD 001898 MECHANICAL AND ELECTRICAL MAINTENANCE 1. Carbon and coke du.st 2. Fluorides 3. Pitch fumes li. Alumina dust 5. Oil mist 6. Noise 7. Heat 8. Vehicle exhaust 9. Metals - Iron 10. Metals - Silicon 11. Metals - Manganese 12. Metal fumes 13. Radiation electric arc lii. Copper 15. Carbon Monoxide 16. Methyl naphthaline 17. Asbestos 18. Magnetic field 19. Chlorine 20. Oxygen ' 21. Slag or skim dust 22. Castor oil 23. HC1 (acid) 2ii. Aluminum 25. Inert gas 26. Silica dust from sandblasting 27. Paint fumes 26. Trichloroethylene from degreaser 29. Solvents used in machinery cleaning 30. Melding fumes 31. Asbestos--'When working on automotive equipment brakes and older steam lines in plant 32. Hydrogen from battery charging 33. Sulfuric acid--automotive batteries 3U. Mood dust--carpenter shop 35. Pesticides and herbicides 36. hydraulic fluid and all types of oil and grease ARD 001899