Laserfiche WebLink
GEOPROBE OPERATION <br /> • GEO 4.12 March 1998 <br /> aj I--- "I -­ 11­­��"­:_ I�­' _­­­'�"41_11­1___ <br /> emphasized on all subsurface investigation location plans and assessment sheets. When <br /> overhead electrical power lines exist at or near the site, consider all wires to be live and danger- <br /> ous. Watch for sagging power lines before entering the site. Do not lift power lines to gain <br /> entrance; call the power company and ask them to raise the lines or de-energize the lines. Before <br /> raising the derrick near power lines, walk completely around the unit. Determine what the <br /> minimum distance from any point on the unit to the nearest power line will be when the derrick <br /> is being raised. Do not raise the derrick or operate the unit if this distance is less than 25 feet or, <br /> if known, the minimum clearance stipulated by federal, state, and local regulations. To avoid <br /> contact with power lines, never move the Geoprobe with the derrick in a raised position. <br /> If there are any questions concerning the safety of drilling on sites near overhead power <br /> lines, contact the power company. The power company will provide expert advice at the site as a <br /> public service at no cost. <br /> Underground electrical utilities are as dangerous as overhead power lines. Be aware and <br /> always suspect the existence of underground utilities. If a sign warning of underground utilities <br /> is located on a site boundary, do not assume that underground utilities are located on or near the <br /> boundary or property line under the sign. Always contact the owners of utilities and determine <br /> jointly the precise location of underground utility lines, and mark or flag the locations. Besides <br /> electrical, other utilities that need to be checked are gas, telephone, water, cable TV, fiber optics <br /> (very important because of the cost to repair them), and sewer. Potentially responsible parties <br /> (PRPs) are often uncooperative in this regard. Private locators can be contracted to survey areas <br /> that the utility locators will not. <br /> 5.2 Operating the Geoprobe <br /> 5.2.1 Visual Inspection <br /> At the start of each work day, the operator must visually inspect the Geoprobe. This <br /> includes (1) checking the hydraulic fluid levels and the hydraulic lines for fraying, cuts, or leaks; <br /> (2) checking the derrick and attachments assembly for adequate lubrication and for damage, <br /> nicks, burrs, and leaks; (3) removing any unnecessary dust, dirt, or oil to prevent jams or damage <br /> to the equipment; (4) checking nuts and bolts; and (5) checking the sampling equipment (e.g., <br /> drive rods, anvils, and pull caps). Figures 1 and 2 show the inspection points on the Geoprobe <br /> 8-A. <br /> 4 <br />