50 CFR §29.118

1. (a)Use surveying methods that minimize the need for vegetative trimming and removal.
2. (b)Locate source points using industry-accepted minimum safe-offset distances from pipelines, telephone lines, railroad tracks, roads, power lines, water wells, oil and gas wells, oil- and gas-production facilities, and buildings.
3. (c)Use equipment and methods that, based upon the specific environment, will minimize impacts to Service-administered lands and waters, and resources of refuges; visitor uses and experiences; and visitor and employee health and safety.
4. (d)If you use shot holes, you must:
   1. (1)Use biodegradable charges;
   2. (2)Plug all shot holes to prevent a pathway for migration for fluids along any portion of the bore; and
   3. (3)Leave the site in a clean and safe condition that will not impede surface reclamation or pose a hazard to wildlife or human health and safety.