• Locate all buried services using plans and a CAT and Genny before drilling.
• Set up drilling rigs on stable, level ground with outriggers fully deployed.
• Monitor for ground gases at every borehole during and after drilling operations.
• Wear chemical-resistant PPE when working on known or suspected contaminated sites.
• Support trial pit sides in unstable ground before allowing anyone to enter.
• Follow the COSHH assessment for the specific contaminants expected at the site.
• Handle and label samples using chain of custody procedures to prevent contamination.
• Brief all operatives on the expected ground conditions and hazards before starting.
• Wash hands and face before eating, drinking, or smoking during investigation work.
• Cap and secure all boreholes after drilling to prevent falls and gas escape.

• DON'T drill without confirming all buried services are located and clear.
• DON'T enter trial pits in unstable ground without support systems in place.
• DON'T handle contaminated soil or water without chemical-resistant PPE.
• DON'T ignore gas readings from boreholes — they can change rapidly.
• DON'T set up the drilling rig on soft or sloping ground without stabilisation.
• DON'T eat, drink, or smoke in contaminated ground investigation work areas.
• DON'T leave open boreholes or trial pits unguarded at the end of the day.
• DON'T mix samples or use contaminated equipment between locations.
• DON'T position the rig beneath overhead power lines without a safe approach plan.
• DON'T assume clean-looking ground is uncontaminated — rely on laboratory results.

See also: Groundworks Safety Awareness | CAT and Genny Safe Use