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Ground Zero Analysis, Inc. <br /> SITE SAFETY PLAN <br /> Chemical Hazards (Continued) <br /> PELISTEUIDLH KNOWN <br /> TASK(S) CHEMICAL {SOIL, WATER AIR, SIGNSISYMPTOMS <br /> ETC.} CONCENTRATION <br /> 1,2 Tetrachloroethene PEL-OSHA 100 ppm 2.0 ppm Irritation of <br /> {PCE} 200 ppm Ceiling eyes/nose/throat; nausea; <br /> 300 ppm (5-min max flush face/neck; vertigo, <br /> in any 3 hrs) dizziness, incoordination; <br /> IDLH 150 ppm headaches, somnolence; <br /> skin erythema; liver <br /> damage; potential <br /> occupational carcinogen <br /> 1,2 1,1,1- PEL 350 ppm 2.2 ppm Irritation of eyes/skin; <br /> Trichloroethane IDLH 700 ppm headaches, lassitude, <br /> (1,1,1-TCA) central nervous system <br /> depressant, poor <br /> equilibrium; dermatitis; <br /> cardiac arrhythmias; liver <br /> damage <br /> Physical Hazards <br /> Task{sl .. Hazzard Mitigation Measure <br /> 1,2 Heavy Equipment (Noise & Physical All heavy equipment used on this project will be <br /> contact) in good working order and operated in accordance <br /> with recognized industry standards and Cal- <br /> OSHA Title 8, Subchapter 4, Construction Safety <br /> Orders. In addition, an exclusion zone applies to <br /> all personnel. The exclusion zone will be 20 feet <br /> to the front and either side of the operating drill <br /> rig. Personnel will not be allowed under booms or <br /> augers at any time. <br /> All equipment operators and ground crews <br /> working in close proximity of heavy equipment <br /> will be supplied with ear protection. <br /> 1,2 Dust The dust hazard will be mitigated by not allowing <br /> ground crew to be located down wind of drilling <br /> and excavation activity. In addition, water will <br /> be applied to control the dust if visible levels of <br /> dust are generated. <br /> PAGE 4 <br />