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+„ 4. ETHYLBENZENE <br /> a. Clear, colorless, highly flammable liquid with characteristic odor. <br /> b. High exposure levels may cause irritation to skin, nose and throat, <br /> dizziness, constriction in chest, loss of consciousness, respiratory <br /> failure. <br /> `r c. PEL for an eight hour TWA is 100 ppm. <br /> ALL SUBSTANCES AS THEY EXIST ON SITE ARE EXPECTED TO BE STABLE. <br /> PHYSICAL HAZARDS <br /> Personnel shall maintain the maximum distance possible from the <br /> borings while performing their activities. Other on--site hazards include <br /> physical injuries due to the proximity of workers to engine-driven <br /> heavy equipment and tools. Heavy equipment used during drilling will <br /> include a drill rig. Only trained personnel will operate machines, tools <br /> and equipment; all will be kept clean and in good repair. Minimum <br /> safety apparel required around heavy equipment will include a <br /> hardhat, steel-toed boots and hearing conservation devices. ALL WORK <br /> WILL BE PERFORMED IN ACCORDANCE WITH OSHA GUIDELINES. <br /> 1 . USE SAFETY EQUIPMENT, MASK RESPIRATORS WITH NIOSH <br /> �- APPROVED C-21 CARTRIDGES FOR ORGANIC VAPORS, AS <br /> NECESSARY. <br /> %tow <br /> 2. HAVE AT LEAST ONE DRY CHEMICAL MODEL PA-200 A-B-C FIRE <br /> EXTINGUISHER PRESENT. <br /> LEVEL OF PROTECTION <br /> A contamination Reduction Zone (CRZ) will be maintained and adjusted <br /> as work proceeds and moves around the site. The workers on site will <br /> wear level 'D' protective clothing. (This protection level may b e <br /> upgraded after on-site conclusions of data are completed). THE LEVEL <br /> OF PROTECTION FOR PERSONNEL WORKING IN THE AREA WILL BE <br /> UPGRADED IF; the organic vapor levels in the operator's breathing zone <br /> exceeds 5 ppm above background levels continuously for more then <br /> five minutes. This will be monitored by use of a hand-held Organic <br /> �. Vapor Meter (Gastech 1314 Oxygen/ppm Concentration Meter (PID) <br /> calibrated with Hexane). In this event, personnel protective equipment <br /> will include full face respirators with double-cartridge filters for organic <br /> vapors and particulates, in addition to hardhat, steel-toed boots a n d <br /> coveralls. If work proceeds in an environment where vapor <br /> concentrations exceed 200 ppm, a self contained breathing apparatus or <br /> airline respirator will be utilized by the personnel. <br /> Tracy Health & Safety Plan - March 1998 <br /> -3- <br />