Three residents of a Louisville, Kentucky neighborhood recently sued when a chemical spill caused vapors to travel through sewer pipes. The claimants are seeking class action status, which would cover anyone in a 1.6 mile area near the plant. At the time of the incident, it was estimated that up to 50 homes were affected by the vapors.  (Source: www.insurancejournal.com)
If the chemical company had a PLL Policy in place, it could be afforded coverage for third party bodily injury or property damage claims and associated legal defense resulting from the chemical spill and associated vapors.