6101 ASSOCIATED BLVD BASE FILE 2017-06-05

by stormwater to Lake George, Lake George Village, New York, Timothy Edwards Middle School •"Sirr-e ts.e 1970s,when there was a rapid increase in the rate South Windsor, CT and concentration of development along the southwestern UCONN Department of Civil &Environmental Engineering shores of Lake George,we have been concerned about the impact of stormwater discharges into the lake," said Tracy West, This study of the Vortechs system was published as a thesis by co-author of the study. Susan Mary Board, as part of the requirements for a Master of Science degree from the University of Connecticut. Her objective Testing Period Feb 2000 to Dec 2000 was to determine how well the Vortechs system retained # of Storms Sampled 13 pollutants from parking lot runoff, including total suspended solids (TSS), nutrients, metals, and petroleum hydrocarbons. Mean Influent Concentration 801-mg/L A Vortechs model 5000 was installed in 1998 to treat runoff Mean Effluent Concentration 105-mg/L from the 82-space parking lot of Timothy Edwards Middle Removal Efficiency 88% School.The entire watershed was approximately 2 acres (0.81 ha), and was 80%impervious. The study concluded that the Village and Town of Lake George Testing Period Jul 2000 to Apr 2001 should consider installing additional Vortechs systems in areas # of Storms Sampled weekly composite samples taken where sedimentation and erosion have been identified as non- point source pollution problems. Mean Influent Concentration 324-mg/L Harding Township Rest Area Mean Effluent Concentration 73-mg/L Harding Township, NJ RTP Environmental Associates Removal Efficiency 77% This third parry evaluation was performed under a U.S. Additionally,the Vortechs system was particularly effective in Environmental Protection Agency grant,administered by the New Jersey Department of Environmental Protection.A. Roger removing zinc(85%), lead(46%), copper(56%), phosphorus Greenway, principal of RTP Environmental Associates, Inc., (67%)and nitrate(54%). conducted the study in conjunction with Thonet Associates, The study concluded that the Vortechs system significantly which assisted with data analysis and helped develop best reduced effluent concentrations of many pollutants in management practices(BMP) recommendations. stormwater runoff. The Vortechs model 4000 was sized to handle a 100-year storm : raw. ± r "s3 ,�. _: - from the 3 acre(1.21 ha)paved parking area at the Harding �. ,, - '— Rest Stop, located off the northbound lane of 1-287 in Harding °' .►, n J, d Township, New Jersey. iiV.(ir° –' • Testing Period May 1999 to Nov 2000 , # of Storms Sampled 5 " Ar Mean Influent Concentration (TSS) 493-mg/L �+►�. ¢ Mean Effluent Concentration (TSS) 35-mg/L °- "TA pp Removal Efficiency(TSS) 93% Mean Influent Concentration (TPH) 16-mg/L Mean Effluent Concentration (TPH) 5-mg/L Removal Efficienty(TPH) 67% The study concluded that truck rest stops and similar parking areas would benefit from installing stormwater treatment systems to mitigate the water quality impacts associated with stormwater runoff from these sites. 5