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considered before choosing them as a substitute. Generally, fluorocarbons are leu haiardous than most other organic solvents. Engineering Controls: when possible, employers must use engineering and administrative controls rather than personal Protective equipment to prevent ove Engineering control methods include las vee work practices, or chanlong the work process. Containers should be tightly WMV4 to prevent evaporation. Some work proces= can be isolated, enclosed, or automated to reduce Local exhaust ventilation systems ("hoods") are the most effective type of ventilation control. These sys- tems capture contaminated air at its source before it spreads into the air in your breathing zone. Personal Protective Equipment: When engineering. controls cannot sufficiently reduce exposures, a respi- rator must be worn and a respiratory protection pro- gram must be developed, as outlined by CaVOSHA regulations (GISO 5144). An industrial hygienist or other knowledgeable person should be consulted to ensure that the equipment is appropriate and is used correctly. Improper respiratory equipment may not provide adequate protection. Fluorocarbons have poor warning properuM so the cartridge or canister on an air -purifying respirator could wear out and need replacement without your knowing that it was no longer effective. Therefore, only a supplied -air respirator or an SCBA is approved If frequent and prolonged skin contact with fluoro- carbons is necessary or if splashes may occur, personal protective equipment such as gloves, goggles, or face - Shields should be worn. Protective clothing should be made of a material which is resistant to the specific fluorocarbon you are using. For instance, neoprene rubber is reported to be resistant to FC -12 and FC - 113. G113. Even the most resistant materials will be pene- trated quickly and should be replaced often. • Califomia workem employers, and health cant professionals who have questions about the health effects of workplace chemicals can contact HESIS at 415/540-3014, Monday -Friday from 1 -Spm. You may call collect from wuhm Calif0mia- 0 Employees who need infomustion or assistance con- cerning workplace health and safety rr8ulati0n4 or who want to file a co+mplatnt can contact Cal/03R1. Workers who are not eovened by state regulations will be referred to the appropnate federal agency. Look in your local phone book's Sowmment section under -California, Industrial Relanons, Occupational Safety and Health,"or call the nearest area of Sacramento 9161920-6123 San Francisco 415/557-1677 Van Nuys 818/901'5403 • Other resources for employees may include your supervisor, your union, yow company health and safety officer, your donor, or your company doctor: • Employers who,,,=t free assistance to evaluate and improve workplace health and safety can contact the nearest ansa ofi:ce of the Cal/OSHA Consultation Service: Sacramento 916/920-5131 San Francisco 415/557-2670 Fresno 209/445-5072 Van Nuys 818/901-5422 Downey 213/861-9993 San Diego 619/279.3771 • In a medical emergency, call 9-1-1, or contact the nearat Poison Control Center. Sec "Crisis Hotlines" luted near the front of your local phone book. 0 • HESIS produces fact sheets, booklets, medical treat- ment guidelines, and technical documents on work- place chemicals. All publications ane free. Some enc available in Spanish or other Languages. For a Pub"' cations, list and order form, call 415/544.3138► or write; HESIS, 2151 Berkeley Way, Room 504, Berkeley CA 94704. n