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25 May 2000 <br /> Site Health and Safety Plan - RV Circuits <br /> Page 3 of 8 <br /> 4.0. HAZARD EVALUATION <br /> The following substance(s) or hazards are known or suspected to be on site. <br /> Substances Involved: Concentrations: <br /> Metals (copper, chromium, lead, zinc, nickel, Maximum: 780 mg/kg copper; 69 mg/kg <br /> cobalt) chromium; 110 mg/kg lead; and 120 mg/kg <br /> zinc; no data for nickel and cobalt. <br /> Acids bases Locally, soil pH ranges from 3.6 to 9.0. <br /> Cyanides Unknown,potential presence in soil. <br /> Or anic-based products (?) Unknown, not suspected to be present in soil. <br /> The primary hazards of each are identified as follows: <br /> 1. Toxic metals- dispersed into the environment as underground leachate,waste water effluent, <br /> or hazardous waste. Most toxic metals are neurotoxins, while many are known human <br /> carcinogens and reproductive toxins. <br /> 2. pH - Contact may cause bums to eyes and skin. If inhaled, may be harmful. May be present <br /> as high or low pH soil; an irritant to skin, may cause itching,burning, blistering. <br /> 3. Cyanides-Poisonous; may be fatal if inhaled, swallowed, or adsorbed through skin. Contact <br /> may cause burns to eyes and skin. Early acute effects include giddiness, headaches, <br /> palpitations, electrical changes in the heart (EKG changes) and difficulty breathing. These <br /> may be followed by coma, convulsions and death. <br /> 4. Organic-based products -Maybe poisonous if inhaled or adsorbed through skin, vapors may <br /> cause dizziness or suffocation, contact may irritate or bum skin or eyes. <br /> The following additional hazards are expected on site: typical work related to facility. Noise, falling <br /> rods, flying hammer, etc. on the probing rig. <br />