NPDES Articles

  • Cost Effective Monitoring Strategies in MS4 Programs

    A Tale of Two Cities: The Evolution of Monitoring Strategies In Municipal Separate Storm Sewer System (MS4) Programs City of Hoover NPDES Permit History On October 12. 2001, the Alabama Department erf Environmental Management (ADEM) issued National Pollutant Discharge Elimination Systems (NPDES) Permit Number ALS000001 for "Birmingham Area Municipal Separate ...


    By In-Situ, Inc.

  • Even small sites must follow best practices to control erosion and runoff

    Since 1990, construction sites larger than 5 acres and municipal separate storm sewer systems (MS4s) serving populations over 100,000 have had to  abide by the rules of the Environmental Protection Agency’s (EPA) National Pollutant Discharge Elimination System (NPDES) Storm Water Program. This program was put in place to protect the country’s waterways from sedimentation buildup. ...


    By FINN Corporation

  • A New Day Dawns

    As demand for water increases nationwide and around the globe, tougher restrictions have been placed on several industries to incentivize reuse and repurposing and discourage contaminant discharge. Across the country, regional power companies are turning to outside experts for solutions that meet their competing needs of being environmentally friendly and economically feasible. For example, GE ...


    By Modern Pumping Today

  • EPA Releases Draft NPDES Pesticide General Permit for Discharges

    On January 26, 2016, the U.S. Environmental Protection Agency (EPA) published its draft National Pollutant Discharge Elimination System (NPDES) General Permit for Discharges from the Application of Pesticides in the Federal ...


    By Bergeson & Campbell, P.C.

  • Storm Water Pollution Prevention Plans

    Why Your Railroad Facility Needs One and What to do About It Did you know that that railroad facilities are subject to the Clean Water Act? This includes requirements to have a ...


    By Antea Group - USA

  • Monitoring Oil in Cooling Water - Case Study

    The Situation A municipal power plant in the southern United States operates more than 10 stationary power plant engines capable of producing 52 megawatts of electric power. The plant is part of a larger statewide power grid system. Within the grid, the municipality brokers the purchase or sale of power hourly, based on the needs of municipality and the market rate for power on the grid ...

  • EPA Clean Water Act: New Regulations re: `Waters of the United States`

    The Environmental Protection Agency (EPA) published a final rule defining the scope of waters protected under the Clean Water Act… The rule will ensure protection for the nation’s public health and aquatic resources, and increase CWA program predictability and consistency by clarifying the scope of ‘‘waters of the United States’’ protected under the ...

  • Environmental Engineering case study

    USX Corporation, Fairless Hill, Bucks County Evaluated hydraulics of water distribution system and its capability to meet very high fire flow requirements for Industrial Park. Assisted with presentation and discussion with Falls Township. Upper Makefield Township, The Arbors Reviewed and approved design of water supply ...


    By Mercuri & Associates, Inc.

  • Mixed Oxidant Replaces “Cocktail” of Chemicals in Power Plan

    Cooling Tower Water Systes Synopsis In 2010 NIPSCO installed two MIOX RIO Mixed Oxidant Solution (MOS) chlorine generator systems on two of the four cooling towers at R.M. Schahfer Generating Station.  After switching to MIOX for cooling tower water treatment, the two towers experienced minimized algae growth, better biocontrol and lower Legionella counts, ...

  • What you don`t know can hurt you

    What You Don't Know Can Hurt You: The ins and outs of site inspection in a new era As NPDES permits strive to improve storm water runoff, site inspections and monitoring put an increasing demand on businesses and municipalities to evaluate and report their program performance. One of the primary goals of the permits is to gather additional data through site monitoring. The permits now are ...

  • A Case Study of a Steel Plating Mill Water Recycling System

    Case study Summary: Wastewater recycling in a steel plating mill utilizing crossflow membrane filtration and reverse osmosis. Abstract: Steel manufacturing plants are large water consumers that use a tremendous amount of water in their production process. As a result of the increasing demand in resource sustainability, high quality process water and ...

  • Army Truck Wash Depot case study

    The Problem: The Army Truck Wash Depot had a trickling filter that was not capable of handling the organic loading generated by heavy vehicle wash operation. The tricking filter was channeling the wastewater due to media that had been crushed by the weight of the biomass that could not be sloughed off. As a result, the ability to treat the wastewater for BOD ...


    By BioprocessH2O

  • Water quality at Blue Plains improved case study

    The Blue Plains Wastewater Treatment Plant in Washington D.C. is the largest advanced wastewater treatment plant in the world. The District of Columbia’s Water and Sewer Authority (WASA) operates the plant. LimnoTech’s expertise in sewer system and river modeling helped WASA make decisions about two complex programs: combined sewer overflow (CSO) control to improve local water ...


    By LimnoTech Inc.

  • Spatial analysis for identifying hotspots of EDC and PPCP sources for monitoring systems

    This study utilized spatial analysis to identify hotspots for endocrine disrupting chemicals (EDCs), pharmaceuticals, and personal care products (PPCPs) using data from potential sources including wastewater treatment plants, National Pollutant Discharge Elimination System (NPDES)-permitted pollution sources, septic systems, and agricultural and grazing areas. The study area is Lake Mead, to ...


    By IWA Publishing

  • Factors Affecting Oil in Water Testing Methods

    Various factors need to be considered when comparing methods to measure oil and grease in water.  Whether you are trying to meet effluent limits for an NPDES (National Pollutant Discharge Elimination System) permit, comply with oil and grease limits for the Clean Water Act (CWA), or an industry satisfying a POTW’s (Publically Owned Treatment Works) discharge permit, it is ...


    By Spectro Scientific

  • Lobsterman’s wharf

    Lobsterman’s Wharf is a seasonal restaurant serving seafood and meat dishes. Fried as well as grilled food is on the menu. There is also a 14-room inn as part of the property. All kitchen wastewater flows through an automatic grease removal unit prior to entering an existing grease trap. Sanitary and kitchen flow enters a pump station that pumps the influent to the treatment plant located ...


    By Walden, Inc.

  • Application note: The Sievers InnovOx TOC Analyzer: Wastewater Monitoring

    Overview Wastewater is used water. It can include substances such as human waste, food scraps, oils, soaps, and chemicals. Manufacturing industries as well as wastewater municipalities must comply with the United States Environmental Protection Agency’s (USEPA) Clean Water Act (CWA) regulations. In order to discharge treated wastewater and be compliant with the CWA, a ...


    By GE Analytical Instruments

  • Woodson IL Case Study 33 Year old system

    Date of Design: 1973 by Benton & Associates Jacksonville, IL Date of Hinde Engineering Installation: 1974 Design Data: Domestic Waste only Design Flow <0.100 MGD Design Load BOD 200 mg/l ~170 PPD TSS 200 mg/l ~170 PPD 2 Lagoons ~ 2 Acres Total 10’ WD 2’ FB 2 Sand Filters In 1999 ADS converted the original aeration system to Out-of-Water ...


    By EP Aeration

  • Northern Indiana Power, NIPSCO cooling tower

    A new onsite mixed oxidant system at the R.M. Schahfer Generating Station of Northern Indiana Public Service Co. (NIPSCO) in Wheatfield, IN, has yielded substantial treatment chemical cost savings and improved summer operation compared to the control unit cooling tower. NIPSCO, an electric and gas utility and subsidiary of NiSource Inc., was approached about the system during a biannual ...

  • Airport deicing effluent treatment and regulatory guidelines

    Airport and airplane deicing is employed with the use of brines, salts, alcohols or glycols to remove and prevent or delay the formation of snow and ice.  In the United States (US), the Federal Aviation Administration requires airlines that operate during icy conditions to perform deicing and anti-icing of aircraft and airfield pavement (USEPA 2011a).  These deicing operations use large ...


    By IWA Publishing

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