Jan. 31 — Under the settlement agreement, TPC was required to monitor butadiene levels in the air at the periphery of the 215-acre compound for one year and post reports on its website whenever readings hit 25 parts per billion. If readings exceeded that threshold twice in a one-hour period hour, TPC was expected to track down the source of the pollution, take measures to reduce it and explain why those actions did or didn’t work.

— Port Neches News