ARCHIVED REPORTS_REVISED DRYWELL CLOSURE AND INVESTIGATION WORK PLAN

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Neil O.Anderson&Associates HASP Page 13 of 21 ' March 18, 2014 ' At a minimum, the utility clearance must include a 48-hour notification of the Underground Service Alert (USA) (prior to the invasive work commencing) and a site visit. The site visit may include a geophysical survey, e.g., using a pipe and cable locator, or a hand-auger operation ' down to 5 feet below ground surface, as appropriate to clear each intrusive boring or cutting location. This HASP is not designed to protect personnel entering excavations requiring protective ' systems. If it becomes necessary for someone to enter such an excavation, the Project Manager must request the Site Health and Safety Officer to develop an acceptable entry procedure, which may include shoring the sides of the excavation. ' Inspections ' Daily inspections of excavations, the adjacent areas, and protective systems will be made to determine if a situation exists that could result in possible cave-ins, failure of protective systems, hazardous atmospheres, or other hazardous conditions. An inspection will be ' conducted prior to the start of fieldwork and as needed throughout the shift. Inspections will also be made after every rainstorm to ensure that no water accumulation has occurred. Employees shall not work in excavations where water has accumulated, unless adequate precautions are taken to protect employees against the hazards posed by water accumulation. The precautions necessary to protect employees adequately vary with each situation, but could include special support or shield systems to protect from cave-ins, water ' removal to control the level of accumulating water, or use of a safety harness and lifeline. 7.0 PERSONAL PROTECTIVE EQUIPMENT The level of employee protection for the work to be completed during site activities was determined by researching site conditions, reviewing planned activities, and identifying site- specific physical and chemical hazards. 7.1 Selection of Personal Protective Equipment It is important that specified PPE protects against known and suspected site hazards. Protective equipment is selected based on the types, concentrations, and routes of personal ' exposure that may be encountered. In situations where the types of materials and possibilities of contact are unknown or the hazards are not clearly identifiable, a more subjective determination must be made of the PPE required, and greater emphasis is placed on experience and sound safety practices. As discussed above, PPE for site workers will be based on site history and on the activities to be performed there. The initial level of PPE for all site work will be Level D. Level D protection consists of the following recommendations: • Coveralls ' Safety boots/shoes • Safety glasses (as necessary) ,004 902 Industrial Way•Lodi,CA 95240-209.367.3701 •Fax 209.333.8303 02014 Neil 0.Anderson&Associates,Inc.