Browsing by Author "Abernethy, Stephen"

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    The effect of non-structural BMP implementation on stormwater run-off at a previously unregulated site
    (2015-05) Abernethy, Stephen
    ABERNATHY, STEPHEN. The Effect of Non-Structural BMP Implementation on Stormwater Run-off at a Previously Unregulated Site In 2009 a chemical manufacturing facility applied for a NPDES permit through NCDENR. This facility had operated for 12 years at this site without a stormwater permit and had to comply with the benchmarks set by NCDENR by 2011. To do this non-structural BMPs were implemented to try and lower the phosphate and zinc contaminate levels in the stormwater effluent leaving the site. This study uses the data collected from 2009 through 2014 to decide whether or not non-structural BMPs could be used as an effective way to meet the standards of the NPDES permit. During this time frame there was a clear reduction in the phosphorous output from the site, while zinc levels remained above the benchmark levels and showed no consistent reduction. However, zinc was found in sources outside of the manufacturer’s control at the site from an underground spring and outfalls from the city coming onto the property. The study shows that non-structural BMPs can be used to effectively lower contamination levels if properly implemented potentially saving companies money on spending to construct and maintain structural BMPs.