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| 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] | | 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] |
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| The list of manufacturers and test results of all OGS products and other verified technologies can be downloaded here: <br> | | The list of manufacturers and test results of all OGS products and other verified technologies can be downloaded here: <br> |
− | {{Clickable button|[[Media:OGS_Verification_test_results.xlsx|Download Verification Test Results spreadsheet(.xlsx)]]}} | + | {{Clickable button|[[File:ISO ETV 14034 verified OGS MTD Test Results.pdf]]|Download Verification Test Results (.pdf)}} |
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| </br> | | </br> |
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| </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> |
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| ==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>]] |
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− | 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> |
− | <math>Q = CiA</math>
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− | **<math>C</math> is the site runoff coefficient,
| + | {{Clickable button|[[File:Cover OGS review sheet.PNG|320 px|link=https://wiki.sustainabletechnologies.ca/images/6/62/OGS_Review_Sheet_LOCKED_UPDATE.xlsx]]}} |
− | **<math>i</math> is the rainfall intensity, and;
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− | **<math>A</math> is the drainage area)
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| + | 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. |
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| ===Associated Documents Submitted with OGS Review Calculator=== | | ===Associated Documents Submitted with OGS Review Calculator=== |