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<br />20 <br /> <br />Extra precautions will be exercised when drilling or working near overhead electrical lines. As <br />stated in California Code of Regulations (CCR), Title 8, Section 2946 Table 2, the minimum <br />clearance required from energized overhead high-voltage lines for boom-type lifting or hoisting <br />equipment is as follows: <br /> <br />Table 2. Material Storage and Boom-Type Lifting or Hoisting Equipment Clearances <br />Required from Energized Overhead High-Voltage Lines <br />Nominal Voltage <br />(Phase to Phase) <br /> Minimum Required <br />Clearance (Feet) <br />600 50,000 10 <br />over 50,000 75,000 11 <br />over 75,000 125,000 13 <br />over 125,000 175,000 15 <br />over 175,000 250,000 17 <br />over 250,000 370,000 21 <br />Over 370,000 550,000 27 <br />Over 550,000 1,000,000 42 <br />Over 1,000,000 Established by utility owner/operator or by a professional engineer in electrical power <br />transmission/distribution <br /> <br /> <br /> <br /> <br /> <br />4.2.2 UNDERGROUND UTILITIES <br /> <br />Hazards include underground utilities that may be impacted when intrusive activities (e.g., <br />excavation and sampling) are conducted. The impact may result in the release of electrical <br />energy, high-pressure water, air/steam, natural gas, or sewage. <br /> <br />Utility Clearance <br />1. To be performed using USA (dial 811) and site utility maps.