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| *Woodside SmartCentre (Markham) | | *Woodside SmartCentre (Markham) |
| *North Queen Street & The Queensway (Etobicoke) | | *North Queen Street & The Queensway (Etobicoke) |
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| The mean performance value recorded at the inlet for OGS practices' ability to remove Total Suspended Sediments (TSS) was was calculated based on 46 separate recordings between 1997 - 1998 amongst the two sites previously mentioned. | | The mean performance value recorded at the inlet for OGS practices' ability to remove Total Suspended Sediments (TSS) was was calculated based on 46 separate recordings between 1997 - 1998 amongst the two sites previously mentioned. |
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| *Woodside SmartCentre (Markham) | | *Woodside SmartCentre (Markham) |
| *North Queen Street & The Queensway (Etobicoke) | | *North Queen Street & The Queensway (Etobicoke) |
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| The mean performance value recorded at the inlet for OGS practices' ability to remove Total Suspended Sediments (TSS) was was calculated based on 46 separate recordings between 1997 - 1998 amongst the two sites previously mentioned. | | The mean performance value recorded at the inlet for OGS practices' ability to remove Total Suspended Sediments (TSS) was was calculated based on 46 separate recordings between 1997 - 1998 amongst the two sites previously mentioned. |
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| '''Refer to the [[Oil and Grit Separator]] page for more information related to updated requirements through laboratory testing in accordance with the [https://etvcanada.ca/wp-content/uploads/2014/06/ETV-OGS-Procedure_final_revised-June_2014.pdf Procedure for Laboratory Testing of Oil-Grit Separators PDF (TRCA/CETV Program)] testing protocol and will have current and valid [https://etvcanada.ca/home/verify-your-technology/current-verified-technologies/ ISO14034: Environmental Technology Verification (ETV) program]. | | '''Refer to the [[Oil and Grit Separator]] page for more information related to updated requirements through laboratory testing in accordance with the [https://etvcanada.ca/wp-content/uploads/2014/06/ETV-OGS-Procedure_final_revised-June_2014.pdf Procedure for Laboratory Testing of Oil-Grit Separators PDF (TRCA/CETV Program)] testing protocol and will have current and valid [https://etvcanada.ca/home/verify-your-technology/current-verified-technologies/ ISO14034: Environmental Technology Verification (ETV) program]. |
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| ==Recent Performance Research== | | ==Recent Performance Research== |
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| | [[File:OGS types Lee, 2014 update.PNG|thumb|400px|Shown here are the two variations of hydrodynamic separators ([[Oil and grit separator]]s) used in the 6-year study conducted by Lee, et al., 2014. All four OGS' used were of different sizes. The first (Type A) was a dip cylindrical plate with a centershaft and the second (Type B) was a hollow cylindrical screen. All four sites where the OGS' were installed were in urban settings in Gyunggi Province, Korea, and discharge into Gyung-An stream, which deposits into the Pal-dang Lake. This lake is the the primary drinking water source for Seoul's Metropolitan area (Lee, et al. 2014<ref>Lee, D.H., Min, K.S. and Kang, J.H., 2014. Performance evaluation and a sizing method for hydrodynamic separators treating urban stormwater runoff. Water science and technology, 69(10), pp.2122-2131)</ref>.]] |
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| *[https://www.conteches.com/Portals/0/Documents/Product%20Evaluation%20and%20%20Testing/vx_harding_township.pdf?ver=2018-05-31-143332-863 (Greenway, 2001) - Stormwater Treatment Demonstration Project - Oil water/grit separator followed by a sand filter.] | | *[https://www.conteches.com/Portals/0/Documents/Product%20Evaluation%20and%20%20Testing/vx_harding_township.pdf?ver=2018-05-31-143332-863 (Greenway, 2001) - Stormwater Treatment Demonstration Project - Oil water/grit separator followed by a sand filter.] |
| **This project took place for Harding Township in New Jersey back in 2001. The performance assessment showcased the ability of a Vortechnics Oil/Grit separator followed by a sand filter's removal ability over three years located at a rest stop off a nearby highway. A full storm analysis was conducted over the three-year project and found that the average TSS (mg/L) entering the Oil/Grit separator was 492 mg/L whereas the outlet of the separator had only 35.18 mg/L of TSS remaining (a ~93% reduction rate). Once water passed through the sand filter after the OGS, the removal efficiency increased to 98.12%, with only 9.28 mg/L of TSS remaining (Greenway, 2001<ref>Greenway, R.A. 2001. Stormwater Treatment Demonstration Project—Oil water/grit separator followed by a sand filter: RTP Environmental Associates. Inc., prepared for Harding Township, NJ, Environmental Commission and the New Jersey Department of Environmental Protection, Paper WM-668. https://www.conteches.com/Portals/0/Documents/Product%20Evaluation%20and%20%20Testing/vx_harding_township.pdf?ver=2018-05-31-143332-863</ref>). | | **This project took place for Harding Township in New Jersey back in 2001. The performance assessment showcased the ability of a Vortechnics Oil/Grit separator followed by a sand filter's removal ability over three years located at a rest stop off a nearby highway. A full storm analysis was conducted over the three-year project and found that the average TSS (mg/L) entering the Oil/Grit separator was 492 mg/L whereas the outlet of the separator had only 35.18 mg/L of TSS remaining (a ~93% reduction rate). Once water passed through the sand filter after the OGS, the removal efficiency increased to 98.12%, with only 9.28 mg/L of TSS remaining (Greenway, 2001<ref>Greenway, R.A. 2001. Stormwater Treatment Demonstration Project—Oil water/grit separator followed by a sand filter: RTP Environmental Associates. Inc., prepared for Harding Township, NJ, Environmental Commission and the New Jersey Department of Environmental Protection, Paper WM-668. https://www.conteches.com/Portals/0/Documents/Product%20Evaluation%20and%20%20Testing/vx_harding_township.pdf?ver=2018-05-31-143332-863</ref>). |
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| *[https://www.eeer.org/upload/eer-14-4-262-.pdf (Jianghua, et al. 2009) - Performance Analysis of a Hydrodynamic Separator for Treating Particulate Pollutants in Highway Rainfall Runoff.] | | *[https://www.eeer.org/upload/eer-14-4-262-.pdf (Jianghua, et al. 2009) - Performance Analysis of a Hydrodynamic Separator for Treating Particulate Pollutants in Highway Rainfall Runoff.] |
| ** This study examined the separation characteristics of particles in runoff from paved roads using a OGS hydro cyclone design. The results indicated the TSS concentration ratio between the overflow and inflow (TSSover/in) decreased as a function of the operational pressure and the particle removal efficiency was mainly affected by the particle size. By using highway runoff results showed that removal efficiency was greater than 60%. The TSSover/in was (0.26 mg/L – 0.41 mg/L) below the Canadian Water Quality Guidelines (CWQGs) (Jianghua, et al. 2009<ref>Jianghua, Y., Qitao, Y. and Kim, Y. 2009. Performance analysis of a hydrodynamic separator for treating particulate pollutants in highway rainfall runoff. Environmental Engineering Research, 14(4), pp.262-269. https://www.eeer.org/upload/eer-14-4-262-.pdf</ref>). | | ** This study examined the separation characteristics of particles in runoff from paved roads using a OGS hydro cyclone design. The results indicated the TSS concentration ratio between the overflow and inflow (TSSover/in) decreased as a function of the operational pressure and the particle removal efficiency was mainly affected by the particle size. By using highway runoff results showed that removal efficiency was greater than 60%. The TSSover/in was (0.26 mg/L – 0.41 mg/L) below the Canadian Water Quality Guidelines (CWQGs) (Jianghua, et al. 2009<ref>Jianghua, Y., Qitao, Y. and Kim, Y. 2009. Performance analysis of a hydrodynamic separator for treating particulate pollutants in highway rainfall runoff. Environmental Engineering Research, 14(4), pp.262-269. https://www.eeer.org/upload/eer-14-4-262-.pdf</ref>). |
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| *[https://pubmed.ncbi.nlm.nih.gov/24845330/ (Lee, et al. 2014) - Performance evaluation and a sizing method for hydrodynamic separators treating urban stormwater runoff.] | | *[https://pubmed.ncbi.nlm.nih.gov/24845330/ (Lee, et al. 2014) - Performance evaluation and a sizing method for hydrodynamic separators treating urban stormwater runoff.] |
| **This study conducted performance monitoring over a 6-year period (137 separate storm events) of four different hydrodynamic separators in Korean urban catchments between 2006 - 2012. Removal rates were relatively low at all four sites (1. Roadway site: Avg. Inflow = 239.32 mg/L vs Avg. Outflow = 122.2- mg/L / 2. Residential site: Avg. Inflow = 59.74 mg/L vs Avg. Outflow = 50.35 mg/L / 3. Roadway Site: Avg. Inflow = 62.50 mg/L vs. Avg. Outflow = 33.76 mg/L / 4. Residential(63.5%) & Roadway (36.5%) CDA site: Avg. Inflow = 236.24 mg/L vs. Avg. Outflow = 160.54 mg/L). The low removal rates were due to high rates of extreme overflow events occurring with most suspended sediment being quite small/fine in nature (<75μm)(Lee, et al. 2014<ref>Lee, D.H., Min, K.S. and Kang, J.H., 2014. Performance evaluation and a sizing method for hydrodynamic separators treating urban stormwater runoff. Water science and technology, 69(10), pp.2122-2131). | | **This study conducted performance monitoring over a 6-year period (137 separate storm events) of four different hydrodynamic separators in Korean urban catchments between 2006 - 2012. Removal rates were relatively low at all four sites (1. Roadway site: Avg. Inflow = 239.32 mg/L vs Avg. Outflow = 122.2- mg/L / 2. Residential site: Avg. Inflow = 59.74 mg/L vs Avg. Outflow = 50.35 mg/L / 3. Roadway Site: Avg. Inflow = 62.50 mg/L vs. Avg. Outflow = 33.76 mg/L / 4. Residential(63.5%) & Roadway (36.5%) CDA site: Avg. Inflow = 236.24 mg/L vs. Avg. Outflow = 160.54 mg/L). The low removal rates were due to high rates of extreme overflow events occurring with most suspended sediment being quite small/fine in nature (<75μm)(Lee, et al. 2014<ref>Lee, D.H., Min, K.S. and Kang, J.H., 2014. Performance evaluation and a sizing method for hydrodynamic separators treating urban stormwater runoff. Water science and technology, 69(10), pp.2122-2131)</ref>. |
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| ==References== | | ==References== |