Drill holes shall not be sprung unless they are more than 100 feet from the nearest hole containing explosives. Holes that have been sprung shall not be charged with explosives until the maximum temperature in any portion of such hole has been reduced to less than 150°F. If an accurate method of measuring the temperature is not available, the hole shall not be reloaded for at least two hours. Sprung holes may be cooled by the addition of sufficient water.
Conn. Agencies Regs. § 29-349-239