Fitesa, a non-wovens manufacturer in the state of Washington consistently tests stormwater but experienced problems meeting the stormwater standards for zinc and copper discharge. Zinc is used in galvanized metal, shingles, finishes in paints, and car tires—zinc iseverywhere. Copper is used in items such as in brake linings and pressure treated lumber. At sites near heavily traveled roads, zinc, copper and lead get passed into the air and deposit on roofs and other surfaces. During the next rain event, pollutants that comprise the environmental deposition become a component of the site’s stormwater runoff. this study shows how MetalZorb from CleanWay Environmental Partners succeeded in helping this site achieve compliance with stringent regulations of the Washington State Department of Ecology (DOE).
- CleanWay Environmental Partners, Inc.
- Washington State DOE stormwater report - Case Study
Productivity Gains in Stormwater Design
For some engineering consultants, traditional stormwater pond design can be one of the most frequent projects within their services portfolio. An engineer with prior experience can size and produce plans with assistance from modeling software, AutoCAD, and supporting tools with relative ease. But even very routine projects can benefit from modeling software improvements. McBade Engineers and Consultants, based in Youngsville, LA, recently deployed XPDRAINAGE 2017 and have already experienced remarkable improvements...
Stormwater Management Improvements Spurred by Low Impact Development Techniques
Abstract A concept first advanced in 19901, evidence of Low Impact Development (LID) can now be seen across North America. Like many infrastructure transformations, this growth in LID design has benefitted from regulatory changes; compliance versus cost remains an important motivator in any commercial venture. Through their efforts, LID pioneers have demonstrated a range of social and aesthetic benefits that have complimented the economics of this approach. Municipalities across the country are leading the...
Micro-zooplankton grazing as a means of fecal bacteria removal in stormwater BMPs
A priority for environmental managers is control of stormwater runoff pollution, especially fecal microbial pollution. This research was designed to determine if fecal bacterial grazing by micro-zooplankton is a significant control on fecal bacteria in aquatic best management practices (BMPs); if grazing differs between a wet detention pond and a constructed wetland; and if environmental factors enhance grazing. Both 3-day grazing tests and 24-h dilution assays were used to determine grazing differences between...
Potential use of ionic species for identifying source land-uses of stormwater runoff
Identifying critical land-uses or source areas is important to prioritize resources for cost-effective stormwater management. This study investigated the use of information on ionic composition as a fingerprint to identify the source land-use of stormwater runoff. We used 12 ionic species in stormwater runoff monitored for a total of 20 storm events at five sites with different land-use compositions during the 2012–2014 wet seasons. A stepwise forward discriminant function analysis (DFA) with the jack-knifed...
Hirschthal, Switzerland protected with WaStop DN1200 - Case Study
Location: Hirschthal, Switzerland Problem: During times of high river levels, flooding occurred in the town of Hirschthal. This flooding occurred when the river level was higher than the stormwater outfall. This lead to river water pushing back up the outfall pipe, and spilling onto roads and residential areas. Solution: A DN1200 (NPS 48″) WaStop inline check valve was installed inside the stormwater outfall to allow stormwater to flow into the river but to prevent any backflow from flowing back up the...