After a year of storm water field-testing, the Hydro Up-Flo filters have received Final Field Certification from the New Jersey Department of Environmental Protection (NJDEP). The filter demonstrated pollutant removal that met or exceeded the requirements of the Technology Acceptance Reciprocity Partnership (TARP) field-testing protocol.
The conditions of the Final Field Certification allow the Up-Flo filter with CPZ Mix filter media to be used to treat up to 0.056 cu ft per second (25 gal per minute) per filter module with a maximum inflow area of 0.66 acres per filter module. The Final Field Certification supersedes and improves upon the Interim Certification first issued by the NJDEP in December 2009, which approved the Up-Flo filter to treat up to 0.045 cu ft per second (20 gal per minute) per Filter Module with a maximum inflow area of 0.3 acres per filter module.
The field testing was conducted on an Up-Flo filter installation along the Tuscaloosa Riverwalk in Tuscaloosa, Ala., an area known for its intense rainfalls and clayey soils. Sampling and analysis was conducted independently by the University of Alabama’s Civil, Construction and Environmental Engineering department.
Over the course of the monitoring period, the Up-Flo filter was subjected to a number of high-intensity storms and a very high pollutant loading. In the first nine months of testing, approximately 6.6 years’ worth of particulate pollution. Overall, the Up-Flo filter demonstrated 89% removal of total suspended solids (TSS), 98% removal of all suspended sediment and 81% removal of suspended sediment with a mean particle size of 29 microns.
“This was an amazing result that demonstrates the extremely robust service life of the filter," said Lisa Lemont, business development manager for Hydro U.S. Stormwater. "The Up-Flo filter is already popular with designer engineers in New Jersey because it offers good value, removing a high percentage TSS from stormwater runoff for a competitive price. With this increase in approved treatment flow rate, engineers, contractors and developers will see significant savings both in space and construction costs.”
Source: Hydro Intl.
