[Old School]

There's nothing there to address. Nobody has claimed that mining coal has no impact on the environment but the study, or the executive summary or whatever you want to call what you post gives no statistics. At a minimum, the article should have stated what the allowable allowance is for selenium (I believe that it is 5 parts per billion, but maybe Old School can confirm that number), how much selenium was measured upstream, and what the readings were downstream. Stating the the measurements upstream were in compliance with the regulations and the measurements taken downstream begs the question of how much was contributed by the mining operation and how much originated from other sources upstream or occurs naturally.

BTW, you posted the article without comment, which you often do, and as often is the case, criticized me for not commenting on the very article on which you declined to comment. That's not how threads like this are supposed to work. Tell us what you think of the information that you posted.

Everyone that I know of has limits of 6 parts per billion. Each outlet is tested bi-monthly and if the average of the two test are over 6 parts per billion then you written a violation for each day in that month.