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III. KEY PERSONNEL AND RESPONSIBILITIES <br /> Predesigned field investigations will be performed by DEL TECH and their associates. <br /> Actual drilling activities will be supervised by Tim McDonald of Geological Technics. <br /> Mr. McDonald will be completing the geological profiling under the direct supervision <br /> of a California Registered Geologist, Dr. Raynold Kablanow. DEL TECH personnel will <br /> be on-site to complete all hand boring activities, and will be responsible for subsequent <br /> soil sampling. Sherwood Analytical Laboratory, in Hilmar, California will be responsible <br /> for the analysis of all soil samples collected. The project manager for DEL TECH will <br /> be Don Light. The project manager for Geological Technics, Inc. is Tim McDonald, both <br /> will be on-site during all field operations. <br /> IV. SITE EVALUATION <br /> A. Chemical Hazards <br /> The primary chemical hazard to which field personnel may be potentially exposed <br /> is diesel hydrocarbon vapors volatilizing from the excavation of the diesel <br /> contaminated soils and motor oil. Previous total petroleum hydrocarbon laboratory <br /> analysis of soils (418.1) indicates a range of 1-1,200 ppm. <br /> 1. Diesel <br /> Properties: aromatic semi-volatile liquid; flash point -50"F, d: <1.0, Vapor <br /> density 3.0-4.0, LEL 1.3%, UEL 6.0%, <br /> ACGIH TLV: TWA 300 ppm <br /> ACGIH STEL: 500 ppm <br /> ODOR Threshold: .3 ppm <br /> Diesel is mildly toxic by inhalation. Human systemic effects by <br /> inhalation: cough, conjunctiva irritation, hallucinations or distorted <br /> perceptions. Repeated or prolonged dermal exposure causes dermatitis. <br /> Can cause blistering of the skin. Inhalation or ingestion can cause central <br /> nervous system depression. Pulmonary aspiration can cause severe <br /> pneumonitis. Some addiction has been reported from inhalation of fumes. <br /> Even brief inhalations of high concentrations can cause fatal pulmonary <br /> edema. The vapors are considered to be moderately poisonous. If its <br /> concentration in air is sufficiently high to reduce the oxygen content below <br /> that needed to maintain life, it acts as a simply asphyxiant. A human eye <br /> irritant. to fight fire use foam, CO., dry chemical. <br /> 2 <br />