Oh stormwater treatment performance lab testing, your time-consuming, methodical steps make me want to pull my hair out. You often leave me with more questions than answers. However, the benefits often counterbalance the challenges. Thank you for answering my questions, even if I must endure the tedious steps of the scientific method; a method that researchers need to follow to answer questions related to cause and effect. The scientific method proves results are caused by isolating variables and testing in different conditions, to validate or invalidate a hypothesis.
EPA selected a removal standard of 80% total suspended solids (TSS) removal as the target pollutant of concern due to high TSS concentrations ubiquitous impact on water quality and degradation to aquatic habitat. Many other pollutants of concern are particle-bound, and TSS is thereby a surrogate for other pollutants. Testing methodologies for stormwater control measures (SCMs) in respects to TSS can vary greatly. There are many sediment characteristics that should be considered when evaluating a SCM for TSS removal performance to ensure apples and apples are being compared among removal efficiencies for SCMs.
Drafting stormwater regulations that are clear, comprehensive and effective is crucial to protecting and preserving receiving waters. The Clean Water Act has yielded a wide spectrum of local stormwater regulations and policies, but many leave something to be desired when it comes to actually mitigating the impacts of urban runoff. It has been our experience that many local regulations are missing core components that are invaluable in achieving our ultimate goal.
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