Changes

==Sizing==

==Sizing==

[[File:OGS Calculation Tool 2024.png|thumb|450px|link=https://wiki.sustainabletechnologies.ca/images/5/57/OGS_Review_Sheet_2024-02-05.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/services-payments/water-environment/managing-rain-melted-snow/what-the-city-is-doing-stormwater-management-projects/other-stormwater-management-projects/design-criteria-for-manufactured-treatment-devices/</ref>]]

[[File:OGS Calculation Tool 2024.png|thumb|450px|link=https://wiki.sustainabletechnologies.ca/images/5/57/OGS_Review_Sheet_2024-02-05.xlsx|This is a screenshot of the latest version of STEP’s OGS Review Sheet Calculator.  The calculator has been developed to facilitate use of ISO 14034 ETV verified test data using a standard approach for all OGS MTD designs.]]

It is recommended that a standard sizing approach be used for all OGS units to ensure they are evaluated based on a consistent methodology.  The attached 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:

It is recommended that a standard sizing approach be used for all OGS units to ensure they are evaluated based on a consistent methodology.  The attached 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: