I found an 11/30/2012 email from Collin Gregory, City Of Arlington gas well inspector, responding to a citizen request for our insurance requirement of the frackers ….
Minimum Required Coverages
Commercial General Liability Policy: $1,000,000 per occurrence
Excess or Umbrella Liability: $10,000,000
Environmental Pollution Liability Coverage: $5,000,000 dollars per loss
Control of Well Coverage: $5,000,000 per occurrence
Workers Compensation and Employers Liability Insurance: $500,000 dollars per accident
Liability Automotive Insurance: $1,000,000 dollars combined single limit per occurrence