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→Intake Protection Zones (IPZs)
'''Vulnerability''' <br>
'''Vulnerability''' <br>
The vulnerability of the three IPZs are assigned scores that reflect their susceptibility to allowing contaminants to reach the municipal intake zone and is determined by local knowledge and technical inptu from industry experts, as well as judgment from the SPA/SPZ committee members.
The vulnerability of the three IPZs are assigned scores that reflect their susceptibility to allowing contaminants to reach the municipal intake zone and is determined by local knowledge and technical input from industry experts, as well as judgment from the SPA/SPZ committee members.
The source vulnerability scores for IPZ-1 and IPZ-2 is based on multiplying the following factors:
The source vulnerability scores for IPZ-1 and IPZ-2 is based on multiplying the following factors:
* IPZ-3 is not provided a vulnerability score due to its setback distance away from intakes. It's perimeter is designated based on nearby lakes and streams that contribute overland flow to the intake<br>
* IPZ-3 is not provided a vulnerability score due to its setback distance away from intakes. It's perimeter is designated based on nearby lakes and streams that contribute overland flow to the intake<br>
(Halton-Hamilton Source Protection Region, 2010<ref name="example4" />; Cataraqui Source Protection Area, 2022<ref name="example5" />)
(Halton-Hamilton Source Protection Region, 2010<ref name="example4" />; Cataraqui Source Protection Area, 2022<ref name="example5" />)
Vulnerability for source water is simply calculated by:
*Determining the amount of time it takes for water to travel through the "unsaturated zone" above the water table; and,
*Adding that number to the modelled time it takes for groundwater to flow from the water table to the well based on the WHPA zone (EarthFx Incorporated, 2010<ref>EarthFx Incorporated. 2010. WHPA Vulnerability Analysis for the Region of Peel Wellfields, Ontario. Client: Region of Peel Infrastructure Planning. Consultant: Engineering and Construction Group. https://www.earthfx.com/?page_id=2205</ref>).
===2) Identify Threats===
===2) Identify Threats===