Installation of stormwater management and treatment demonstration facility.
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2013-06-01
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Abstract:Roadway runoff contributes large amounts of suspended solids/sediment, heavy metals, petroleum
hydrocarbons, deicing chemicals, bacteria and other constituents to receiving waterways. The EPA
National Urban Runoff Program (NURP) indicated that lead, zinc and copper were the pollutants
most likely to be found in urban stormwater runoff. The occurrence of toxic heavy metals from
Rhode Island highways, verified in a report completed by Thiem et al. in 1998, showed that
cadmium, chromium, copper, lead, nickel and zinc exceeded EPA’s acute and/or chronic water
quality criteria. Besides toxic metals, stormwater also contains petroleum hydrocarbons, nutrients,
and microbial matter as well as many other chemical compounds (Goebel et al., 2007). These toxic
stormwater constituents are easily washed into water bodies, causing a decrease in overall water
quality and stream diversity. In addition, toxic compounds often bind to soil particles and, upon
entering drainage and runoff treatment structures, have to be removed and safely disposed of.
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