Turbidity monitoring equipment and methodology evaluation at MDOT construction sites.
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2014-12-01
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Abstract:State Study 261 is a continuation of State study 225, "Turbidity Monitoring at Select
MDOT Construction Sites", which was successful in establishing baseline stream data
at several active construction sites. State Study 261 focused on the equipment and
methodology of monitoring turbidity upstream and downstream of representative
project outfall locations. This equipment evaluation included collecting receiving
stream turbidity measurements, evaluating equipment performance in the field, and
determining which solutions are more cost-effective, accurate, reliable, and defensible
when it comes to monitoring changes in turbidity between the upstream (background)
and the downstream locations at representative project discharge locations. Using
current MDEQ WQS, sampling points at four monitoring sites were situated upstream
and 750 feet downstream from the discharge point. Sampling these locations was
determined the most effective way to assess how MDOT construction practices are
performing in relationship the current MDEQ WQS.
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