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Job Safety Analysis <br /> Drilling Underground/Overhead Utilities • Identify all utilities around the site before work <br /> commences <br /> • Cease work immediately if unknown utility markers <br /> are uncovered <br /> • Use manual excavation within 3 feet of known utilities <br /> • Utility clearance shall conform with 29 CFR 1926.955 <br /> (high voltage>700 kv) 15 feet phase to ground <br /> clearance;31 feet phase to phase clearance <br /> Drilling High Noise Levels • Use hearing protection when exposed to excessive <br /> noise levels(greater than 85 dBA over an 8-hour work <br /> period) <br /> • Assess noise level with sound level meter if possibility <br /> exists that level may exceed 85dBA TWA <br />