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Also contact the local Roadmaster, Yardmaster, Signal Supervisor or other local contact for signal/telecommunications, electrical and water service shops (trades) to determine whether there are any underground communication lines, electrical lines, or utilities in an area of drilling/invasive work. Request any available maps, drawings or utility information and document your request for information in writing (see the BNSF Railway Underground Cable Location & Acknowledge form provided for on K/J Safety Zone). Contact the local/regional underground utility location center to document planned activities and request all underground utilities be located. In most (if not all) US states, this can be initiated by dialing "811". Contacting the local underground utility center is also required by state law. Contacting the local utility location center is required for each episode (event) of invasive work. It is preferred to arrange a field meeting with utility representatives to confirm the absence of utilities at each drilling location. Maintain a written record for each boring/invasive location and get signatures from the locators documenting the locations are clear of utilities. This can be performed on a site map or KJ's Utility Locate Form & Acknowledgment Form (provided in the KJ Safety Zone). The goal is to have written acknowledgement that all final drilling locations are free of underground utilities. At all locations where drilling, probing or well installation will be performed, an air-knife of similar form or suction pot-holing will be performed to assess possible underground utilities in the upper 6 to 8 feet of soils (depending on local conditions and expected depth of utilities). Potholing is required at all drilling locations, except in remote areas where the likelihood of encountering underground utilities is very low and only as approved by a Risk Manager, Resource Manager or Officer of the company familiar with underground utilities. (Note: Use of an air knife will be appropriate for most invasive drilling and probing work, but may not be appropriate for certain activities like very shallow borings (less than 1-foot deep), certain hand-auger borings, remedial injections using probe equipment and test pitting.) Case by case exceptions for activities may be provided. Optional Step — While it is recommended under most conditions, an optional additional step includes coordinating (including establishing a written contract) with a private utility locator to perform an independent utility evaluation to locate "all underground utilities" at the proposed locations of invasive work. Maintain written record for each boring/invasive location and get signatures from the locators. [Note: This step is typically not too expensive and can save costs incurred during suction pot-holing by focusing the areas of the borings (i.e., provides prior knowledge of possible utilities)" 2