fundamentals of engineering supplied-reference handbook - Ventech!
fundamentals of engineering supplied-reference handbook - Ventech!
fundamentals of engineering supplied-reference handbook - Ventech!
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RISK ASSESSMENT<br />
Hazard Assessment<br />
The fire/hazard diamond below summarizes common<br />
hazard data available on the MSDS and is frequently<br />
shown on chemical labels.<br />
A<br />
B<br />
D<br />
C<br />
Position A – Hazard (Blue)<br />
0 = ordinary combustible hazard<br />
1 = slightly hazardous<br />
2 = hazardous<br />
3 = extreme danger<br />
4 = deadly<br />
Position B – Flammability (Red)<br />
0 = will not burn<br />
1 = will ignite if preheated<br />
2 = will ignite if moderately heated<br />
3 = will ignite at most ambient temperature<br />
4 = burns readily at ambient conditions<br />
Position C – Reactivity (Yellow)<br />
0 = stable and not reactive with water<br />
1 = unstable if heated<br />
2 = violent chemical change<br />
3 = shock short may detonate<br />
4 = may detonate<br />
Position D – (White)<br />
OXY = oxidizer<br />
ACID = acid<br />
ALKALI = alkali<br />
Cor = corrosive<br />
W = use no water<br />
= radiation hazard<br />
Flammable<br />
Describes any solid, liquid, vapor, or gas that will ignite<br />
easily and burn rapidly. A flammable liquid is defined by<br />
NFPA and DOT as a liquid with a flash point below 100°F<br />
(38°C).<br />
153<br />
ENVIRONMENTAL ENGINEERING (continued)<br />
Material Safety Data Sheets (MSDS)<br />
The MSDS indicates chemical source, composition,<br />
hazards and health effects, first aid, fire-fighting<br />
precautions, accidental-release measures, handling and<br />
storage, exposure controls and personal protection,<br />
physical and chemical properties, stability and reactivity,<br />
toxicological information, ecological hazards, disposal,<br />
transport, and other regulatory information.<br />
The MSDS forms for all chemical compounds brought on<br />
site should be filed by a designated site safety <strong>of</strong>ficer. The<br />
MSDS form is provided by the supplier or must be<br />
developed when new chemicals are synthesized.<br />
Exposure Limits for Selected Compounds<br />
Allowable Workplace<br />
N<br />
Exposure Level (mg/m 3 Chemical (use)<br />
)<br />
1 0.1 Iodine<br />
2 5 Aspirin<br />
3 10 Vegetable oil mists (cooking oil)<br />
4 55<br />
1,1,2-Trichloroethane<br />
(solvent/degreaser)<br />
5 188<br />
Perchloroethylene<br />
(dry-cleaning fluid)<br />
6 170 Toluene (organic solvent)<br />
7 269<br />
Trichloroethylene<br />
(solvent/degreaser)<br />
8 590<br />
Tetrahydr<strong>of</strong>uran<br />
(organic solvent)<br />
9 890 Gasoline (fuel)<br />
10 1,590 Naphtha (rubber solvent)<br />
11 1,910<br />
1,1,1-Trichloroethane<br />
(solvent/degreaser)<br />
American Conference <strong>of</strong> Government Industrial Hygienists (ACGIH) 1996.
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