• Solutions
    NTU provides sediment, erosion and turbidity control monitoring and consulting expertise to the construction industry.
  • Simple Technology
    Using polyacrylamide with simple technology = clean, healthy water
  • Monitoring
    We expect the unexpected!
  • Before and After GeoScrub Bubbles
    Turbidity reduction using polyacrylamide
  • Stormwater Management
    Even in the toughest environments

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"Melanie is very intelligent, hard-working, and a great educator."
Greg Jennings, PE, PhD - NC State University Biological & Agricultural Engineering Department

Turbidity Monitoring Services, Raleigh, North Carolina

NTU's goal is to provide experience and knowledge, monitoring, and quality assurance to the construction and development industry to ensure cleaner stormwater discharges from construction sites using the latest technologies. Call us at 919.412.7537 or email us today to find out how we can help you.

Blog Archive

September 16, 2013


High levels of turbidity and fine suspended sediments are often found in stormwater discharges from construction sites even when best management practices (BMPs) for sediment control are in place. This study evaluated turbidity reduction by three check dam types: 1) rock check dam representing a standard BMP, 2) excelsior wattle representing a fiber check dam (FCD), and 3) rock check dam wrapped with excelsior erosion control blanket (rock + excelsior ECB) representing an alternative FCD.