Field Office Compliance - Assistance

Assistance ID - 65755
North Central Iowa Regional Sanitary Landfill - 310204356
2150 South 22nd Street Fort Dodge, IA 50501
Webster County

FO 2

Report
File Name File Type File Date Note
Comments
12/19/2013 Wayne Krug of Quarry Services called and asked what were his options if he wanted to dewater a future gypsum mine, but his sulfate limit exceeded the standard discharge limit for a GP#5? I told him that he would likely need to get an individual NPDES permit, which is a lengthy process. We discussed the notion of him treating the water, in some unspecified way, and if he was able to meet the sulfate discharge limit that way, could he then discharge under the GP#5? I stated that the GP#5 contemplates treatment via physical management practices, such as settling basins, and that if he wanted to use, say, a chemical treatment, he would need to make a specific proposal and then I could better advise him on which permit to seek. I asked Mr. Krug why he thought he couldn’t meet the sulfate discharge limit of 1,514 mg/l, and he stated that he didn’t meet it at his other mine. I inquired further on this point and Mr. Krug indicated that after the issues at the NCRSWA quarry in Fort Dodge they had gotten a GP#5 for that site and tested the retained water, which had a sulfate concentration exceeding 1,600 mg/l. Mr. Krug stated that he gave the results to NCIRSWA who then drained the mine and turned it into a sedimentation basin. We discussed the specific timing of who did what when, and I noted that since the water accumulated in what was a mine at the time, then there was likely a violation of the GP#5 discharge limits. Mr. Krug asked what DNR would do and I suggested that DNR would review the results when he sent in his annual GP#5 report and, in a hypothetical situation, we would review all the relevant circumstances and check to see if there were any unresolved enforcement actions pending before determining our response. DAVID MILLER
State of Iowa DNR Home Site Policy
Leading Iowans in caring for our natural resources
Version: 2.3.2.24780