3 ms·

IMO a trench mitigates the danger effectively.

• WalterBright 3y ago
  They're against the building code around here.
• darkr 3y ago
  Until you fall into it when you’re not paying attention!
• Arrath 3y ago
  Make sure it is shored correctly!
• thimkerbell 3y ago
  But fumes can collect in a trench, is that right?