Saw this via the Mineral Wells Index

According to the Railroad Commission inspector’s report of the visit Friday, an unlined work-over pit, measuring 21 feet long, 15 feet wide and 6 feet deep, was receiving oil and gas well produced water from the broken casing.

The ground as far away as 80 feet from the well was reported polluted with hydrocarbons (the main component of petroleum and natural gas) and high chloride (salty) water. About 600 feet of the stream, not currently flowing, was also reported contaminated.

Geer was told to line the pit with plastic or steel containment and to flush the stream until the water tested normal, according to the report.

“We didn’t know it had to be lined,” Gunter said.