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Health and Safety Plan July 18, 1994 Law/Crandall Project Golden Final • Count the heart rate by the radial pulse for 1 minute for all personnel at the beginning of the day prior to start of activities. • Work for 1 to 11h hours. • Count the heart rate for all personnel as soon as possible in the beginning of the break period. • Count the heart rate one minute later and again a minute after that (a total of 3 measurements about 1 minute apart). The heart rate should decrease by 10 beats per minute (BPM) between each successive measurement (a total reduction of 20 BPM). • If the initial heart rate exceeds 110 BPM, shorten the next work cycle by 1/3 and keep the rest periods at 15 minutes. • If the heart rate does not decrease by at least 20 BPM, shorten the next work cycle by 1/3. Do not start work again until the heart rate has decreased by 20 BPM. • If the heart rate ever exceeds 120 BPM, the employee will be required to rest until the heart rate decrease to below 90 BPM. 4.3 Health Hazards At present, there is no information to indicated that the site soils are contaminated. The principal chemicals used at the site are various acidic and basic solutions for cleaning and disinfecting process equipment; anhydrous ammonia used in the refrigerant system; hydraulic fluids for lubrication of equipment; rodent bait and pesticides for control of insects; and compressed gasses for welding operations. 4.3.1 Hazard Evaluation Subsurface work in the area of the septic system leach field have the potential to be exposed to corrosive soils, hydraulic fluids, semi-volatile organic solvents, nuisance dust, and potentially heavy metals. In addition, there is a potential for hydrogen sulfide and methane to be present from the decomposition of sewage. Potential health hazards include target organ toxicity from inhalation of vapors or particulates and tissue destruction due to contact with corrosive soils. Accidental ingestion of contaminants may 8