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ENVIRONMENTAL TECHNOLOGY VERIFICATION REPORT: STORMWATER SOURCE AREA TREATMENT DEVICE — BAYSAVER TECHNOLOGIES, INC. BAYSAVER SEPARATION SYSTEM, MODEL 10K
Citation:
NSF INTERNATIONAL. ENVIRONMENTAL TECHNOLOGY VERIFICATION REPORT: STORMWATER SOURCE AREA TREATMENT DEVICE — BAYSAVER TECHNOLOGIES, INC. BAYSAVER SEPARATION SYSTEM, MODEL 10K. U.S. Environmental Protection Agency, Washington, DC, EPA/600/R-05/113, 2005.
Impact/Purpose:
Inform the public.
Description:
Verification testing of the BaySaver Separation System, Model 10K was conducted on a 10 acre drainage basin near downtown Griffin, Georgia. The system consists of two water tight pre-cast concrete manholes and a high-density polyethylene BaySaver Separator Unit. The BaySaver Model 10K is designed to accept flows up to 21.8 cfs. The verification challenge included collecting influent and treated effluent samples during 15 qualified storm events. A qualified storm event was defined as a minimum of 0.2 in. of rainfall, where representative sample aliquots are collected throughout the duration of the event and composited into a flow-weighted composite sample. The influent and effluent sampling areas were equipped with automated samplers and flow monitoring devices to collect and monitor the flows entering and exiting the system. The verification testing concluded that the system was capable of removing 33% of sediment as determined by the total suspended solids (TSS) analytical procedure and 82% of sediment as measured by the suspended sediment concentration (SSC) analytical procedure. Particle size analysis conducted on stormwater samples showed the runoff entering the BaySaver removed a larger proportion of sediment with a particle size greater than 62.5 5m. The BaySaver also removed total nitrite, nitrate, phosphorous, total Kjeldahl nitrogen (TKN), and total zinc. The system was cleaned before the start of verification testing, and after the completion of the 18-month verification period. Maintenance consisted of replacing the filter cartridges and vacuuming sediments from the sediment chamber. At the end of the verification period, approximately 2 ft of sediment was retained in the primary manhole and approximately 2 in. of sediment was retained in the secondary manhole.