NPDES Permitting - REMC has managed NPDES permits for large industrial facilities containing multiple regulated outfalls with total discharges of over 35 million gallons per day. As part of work for this client we have managed the renewal of ten NPDES Permits over a one-year period. We have assisted with the science of effluent limits, derived site-inspection studies and provided feedback to the permitting authority. We have conducted treatment feasibility studies utilizing biochemical and conventional treatment methods. REMC performed facility discharge audits to determine sources of metals loading and potential mitigation methods to improve water quality and increase permit compliance with the Clean Water Act. REMC conducted Dissolved Metals Translator Studies (DMTs) to more accurately reflect site conditions with respect to the biologically-available fraction of metals. REMC performed mixing calculations to determine the impacts of discharge to waters with Total Maximum Discharge Limits (TMDLs) and proposed 303(d) listings. Sampling included the collection of water samples for trace-metals analysis using EPA Method 1669 and Whole Effluent Toxicity (WET) Testing. We have developed a prototype water management system for underground mine operations, conducted TIE investigations, evaluated conventional Waste Water treatment Plant efficiency, developed full Quality Assurance/Quality Control Sampling and Analysis Plans and assisted with regulatory negotiations on a multi-million dollar settlement agreement with EPA and DOJ.