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Line 103: − + − + − + − <math>Q = CiA</math>+ − **<math>C</math> is the site runoff coefficient, + − **<math>i</math> is the rainfall intensity, and; + − **<math>A</math> is the drainage area)+ + + − + − +
→Sizing
For OGS, the ISO 14034 verification process in Canada consists of two parts:
For OGS, the ISO 14034 verification process in Canada consists of two parts:
# Third party laboratory testing of MTDs in accordance with the [https://sustainabletechnologies.ca/home/urban-runoff-green-infrastructure/conventional-stormwater-management/hydrodynamic-separators/procedure-for-laboratory-testing-of-oil-grit-separators/ TRCA’s Procedure for Laboratory Testing of Oil Grit Separators] and associated bulletins, and
# Third party laboratory testing of MTDs in accordance with the [https://sustainabletechnologies.ca/home/urban-runoff-green-infrastructure/conventional-stormwater-management/hydrodynamic-separators/procedure-for-laboratory-testing-of-oil-grit-separators/ TRCA’s Procedure for Laboratory Testing of Oil Grit Separators] and associated bulletins, and
# Third party verification of the test in accordance with the [https://etvcanada.ca/home/verify-your-technology/ISO 14034 ETV standard].
# Third party verification of the test in accordance with the [https://etvcanada.ca/home/verify-your-technology/ ISO 14034 ETV standard].
The ISO 14034 verification process is currently administered by [https://etvcanada.ca/home/contact/ Globe Performance Solutions and Verify Global]. Completed ISO 14034 verification statements for OGS are posted to the [https://etvcanada.ca/home/verify-your-technology/current-verified-technologies/ website, here].
The ISO 14034 verification process is currently administered by [https://etvcanada.ca/home/contact/ Globe Performance Solutions and Verify Global]. Completed ISO 14034 verification statements for OGS are posted to the [https://etvcanada.ca/home/verify-your-technology/current-verified-technologies/ website, here].
!style="width: 40%;"|Technology Name
!style="width: 40%;"|Technology Name
!style="width: 25%;"|Company Name
!style="width: 25%;"|Company Name
!style="width: 25%;"|Fact Sheet
!style="width: 25%;"|Verification Statements
|-
|-
|'''2022'''
|'''2022'''
|RWM-DM-1200 & DM-1200-OS Stormwater Systems
|RWM-DM-1200 & DM-1200-OS Stormwater Systems
|Rainwater Management LTD.
|Rainwater Management LTD.
|[https://etvcanada.ca/wp-content/uploads/2022/09/ISO-14034-ETV-Verification-Statement_RWM-DM-1200_2022-2025.pdf Fact Sheet]
|[https://etvcanada.ca/wp-content/uploads/2022/09/ISO-14034-ETV-Verification-Statement_RWM-DM-1200_2022-2025.pdf Verification Statement]
|-
|-
|'''2019'''
|'''2019'''
|Hydro International Downstream Defender® OGS
|Hydro International Downstream Defender® OGS
|Hydro International
|Hydro International
|[https://www.verifiglobal.com/media/tsmpnsdh/vg-2019-09-01-hi-downstream-defender-verification-statement-re-issue-v2-for-posting-2022-09-15.pdf?la=da Fact Sheet]
|[https://www.verifiglobal.com/media/tsmpnsdh/vg-2019-09-01-hi-downstream-defender-verification-statement-re-issue-v2-for-posting-2022-09-15.pdf?la=da Verification Statement]
|-
|-
|'''2019'''
|'''2019'''
|SciCLONE™ Hydrodynamic Separator
|SciCLONE™ Hydrodynamic Separator
|Bio Clean Environmental Inc. (A Forterra Company)
|Bio Clean Environmental Inc. (A Forterra Company)
|[https://etvcanada.ca/wp-content/uploads/2022/02/ISO14034-Verification-Statement_BioClean-SciCLONE_2022-2025.pdf Fact Sheet]
|[https://etvcanada.ca/wp-content/uploads/2022/02/ISO14034-Verification-Statement_BioClean-SciCLONE_2022-2025.pdf Verification Statement]
|-
|-
|'''2018'''
|'''2018'''
|Hydro International First Defense® OGS
|Hydro International First Defense® OGS
|Hydro International
|Hydro International
|[https://www.verifiglobal.com/media/xr3he5i2/vg-2018-10-01-hi-fdhc-final-for-posting-2018-10-15-rev-2019-02-01.pdf Fact Sheet]
|[https://www.verifiglobal.com/media/xr3he5i2/vg-2018-10-01-hi-fdhc-final-for-posting-2018-10-15-rev-2019-02-01.pdf Verification Statement]
|-
|-
|'''2018'''
|'''2018'''
|Hydroworks® HydroStorm (HS) OGS
|Hydroworks® HydroStorm (HS) OGS
|HydroWorks, LLC
|HydroWorks, LLC
|[https://etvcanada.ca/wp-content/uploads/2021/05/ISO14034-VS_Hydroworks_HS_2021-2024.pdf Fact Sheet]
|[https://etvcanada.ca/wp-content/uploads/2021/05/ISO14034-VS_Hydroworks_HS_2021-2024.pdf Verification Statement]
|-
|-
|'''2017'''
|'''2017'''
|Stormceptor® EF and EFO Oil-Grit Separators
|Stormceptor® EF and EFO Oil-Grit Separators
|Imbrium Systems, Inc.,
|Imbrium Systems, Inc.,
|[https://etvcanada.ca/wp-content/uploads/2020/11/ISO-14034-Verification-Statement-_Stormceptor_EF-EFO_2020-2023.pdf Fact Sheet]
|[https://etvcanada.ca/wp-content/uploads/2020/11/ISO-14034-Verification-Statement-_Stormceptor_EF-EFO_2020-2023.pdf Verification Statement]
|-
|-
|'''2017'''
|'''2017'''
|CDS Hydrodynamic Separator®
|CDS Hydrodynamic Separator®
|CONTECH Engineered Solutions LLC
|CONTECH Engineered Solutions LLC
|[https://etvcanada.ca/wp-content/uploads/2020/10/ISO-14034-ETV-Verification-Renewal-Contech-CDS_2020-2023-Final_r1.pdf Fact Sheet]
|[https://etvcanada.ca/wp-content/uploads/2020/10/ISO-14034-ETV-Verification-Renewal-Contech-CDS_2020-2023-Final_r1.pdf Verification Statement]
|-
|-
|'''2016'''
|'''2016'''
|SDD3 Oil Grit Separator®
|SDD3 Oil Grit Separator®
|Next Stormwater Solutions (8091200 Canada Inc.)
|Next Stormwater Solutions (8091200 Canada Inc.)
|[https://etvcanada.ca/wp-content/uploads/2019/10/ISO-14034-ETV-Verification-Renewal-NEXT-SDD3_2019-2022.pdf Fact Sheet]
|[https://etvcanada.ca/wp-content/uploads/2019/10/ISO-14034-ETV-Verification-Renewal-NEXT-SDD3_2019-2022.pdf Verification Statement]
|-
|-
|}
|}
# '''Light liquid capture and retention test''': An optional test in which beads with a density similar to motor oil are pre-loaded into the unit and the number of beads in the effluent are measured to assess the capacity of the unit to trap and retain light liquids.
# '''Light liquid capture and retention test''': An optional test in which beads with a density similar to motor oil are pre-loaded into the unit and the number of beads in the effluent are measured to assess the capacity of the unit to trap and retain light liquids.
There are currently eight OGS vendors with ISO 14034 verifications (as shown in the [[Oil and Grit Separator#Testing and Verification|table]] above). The list of manufacturers and test results of all OGS products and other verified technologies can be found [https://etvcanada.ca/home/verify-your-technology/current-verified-technologies/ here]. Sediment removal performance results were relatively consistent across different MTD designs, with slightly more variation at higher surface loading rates (see Graph below). <br>
There are currently eight OGS vendors with ISO 14034 verifications (as shown in the [[Oil and Grit Separator#Testing and Verification|table]] above). A summary of OGS MTD test results from the verification statements is provided [https://etvcanada.ca/home/verify-your-technology/current-verified-technologies/ here]
<br>
<br>
The list of manufacturers and test results of all OGS products and other verified technologies can be downloaded here: <br>
{{Clickable button|[[File:ISO ETV 14034 verified OGS MTD Test Results.pdf]]|Download Verification Test Results (.pdf)}}
<br>
</br>
Sediment removal performance results were relatively consistent across different MTD designs, with slightly more variation at higher surface loading rates (see Graph below). <br>
'''<small>*Note:''' Oil Grit Separators do not achieve the 80% removal efficiency required for stand alone application in Ontario, even at very low flow rates.</small>
'''<small>*Note:''' Oil Grit Separators do not achieve the 80% removal efficiency required for stand alone application in Ontario, even at very low flow rates.</small>
</br>
</br>
[[File:OGS-Protocol-Webpage-Image.jpg|thumb|320px|In lab testing of a Stormceptor OGS device, here seen testing discharge rates and sediment effluent loads at St. Anthony Falls Laboratory, Minneapolis, Minnesota. (Saddoris, et al. 2010)<ref>Saddoris, D.A., McIntire, K.D., Mohseni, O., and J.S. Gulliver, 2010. Hydrodynamic Separator Sediment Retention Testing – Final Report. Minnesota Department of Transportation, St. Paul, MN.</ref>]]
[[File:OGS-Protocol-Webpage-Image.jpg|thumb|320px|Performance testing of an OGS unit in St Anthony Falls Laboratory in Minnesota (Saddoris, et al. 2010)<ref>Saddoris, D.A., McIntire, K.D., Mohseni, O., and J.S. Gulliver, 2010. Hydrodynamic Separator Sediment Retention Testing – Final Report. Minnesota Department of Transportation, St. Paul, MN.</ref>]]
[[File:OGS min Max.png|900px]]<br>
[[File:OGS min Max.png|900px]]<br>
</br>
</br>
==Sizing==
==Sizing==
[[File:OGS Calculation Tool.PNG|thumb|450px|See a screenshot of a recent version of the ''OGS Review Calculator'' used for developers/manufacturers of new OGS MTDs to help with the submission of their devices to the International Working Group on Environmental Technology Verification (IWG-ETV) (Photo Source: City of Toronto, 2020)<ref>City of Toronto. 2020. Proposed Manufactured Treatment Devices Guidelines. Version 0.0. Accessed: https://www.toronto.ca/wp-content/uploads/2020/03/9495-Draft-for-Feedback_Proposed-MTD-Guidelines_3-Mar-20_a.pdf</ref>]]
[[File:OGS Calculation Tool UPDATE.png|thumb|450px|link=https://wiki.sustainabletechnologies.ca/images/6/62/OGS_Review_Sheet_LOCKED_UPDATE.xlsx|See a screenshot of a recent version of STEP’s OGS Review Sheet Calculator used for developers/manufacturers of new OGS MTDs to help with the submission of their devices to the International Working Group on Environmental Technology Verification (IWG-ETV) (Photo Source: City of Toronto, 2020)<ref>City of Toronto. 2020. Proposed Manufactured Treatment Devices Guidelines. Version 0.0. Accessed: https://www.toronto.ca/wp-content/uploads/2020/03/9495-Draft-for-Feedback_Proposed-MTD-Guidelines_3-Mar-20_a.pdf</ref>]]
It is recommended that a standard sizing approach be used for all OGS units to ensure they are evaluated based on a consistent methodology. See a screenshot of the City of Toronto's and STEP's '''''OGS Review Calculator''''' has been developed to facilitate application of ISO 14034 ETV test data through a standard approach applicable to all OGS MTD designs. The following methods and processes are built into the tool:<br>
It is recommended that a standard sizing approach be used for all OGS units to ensure they are evaluated based on a consistent methodology. See a screenshot of STEP's '''''OGS Review Sheet''''', which has been developed to facilitate application of ISO 14034 ETV test data through a standard approach applicable to all OGS MTD designs. Click the button below to download an excel version of the tool:
'''Rational Method''' used as a basis for flow calculations:<br>
<br>
<br>
{{Clickable button|[[File:Cover OGS review sheet.PNG|320 px|link=https://wiki.sustainabletechnologies.ca/images/6/62/OGS_Review_Sheet_LOCKED_UPDATE.xlsx]]}}
<br>
<br>
The following methods and processes are built into the tool:<br>
*'''Rational Method''' used as a basis for flow calculations:<br>
* Target treatment is based on capture and treatment of the average annual runoff volume for the site using ISO 14034 verified sediment removal test results for 7 surface loading rates
* Target treatment is based on capture and treatment of the average annual runoff volume for the site using ISO 14034 verified sediment removal test results for 7 surface loading rates
* Linear interpolation is used to calculate sediment removal efficiencies between the ISO/ETV tested surface loading rates
* Linear interpolation is used to calculate sediment removal efficiencies between the ISO/ETV tested surface loading rates
* Surface loading rates below the lowest ISO/ETV tested surface loading rate are assigned a sediment removal efficiency equal to that of the lowest tested rate
* Surface loading rates below the lowest ISO/ETV tested surface loading rate are assigned a sediment removal efficiency equal to that of the lowest tested rate
* Hourly historical rainfall data (minimum 20 years) are used to generate the rainfall intensity distribution curve.
* Hourly historical rainfall data greater than 1mm for the April to October period are used to generate the rainfall intensity frequency distribution curves.
* Capacity to add historical rainfall record is provided in order to generate the relationship between hourly rainfall intensities vs average annual rainfall volume for the meteorologic station of choice.
* Users may input their own rainfall intensity frequency distribution curve data for meteorological stations not provided in the tool.
===Associated Documents Submitted with OGS Review Calculator===
===Associated Documents Submitted with OGS Review Calculator===