220 Arkell Road - Guelph, ON Environmental Impact Study Addendum

These drive-point piezometers are designed to track the hydroperiod of the wetland following construction of the SWM facility to assist in evaluating whether post-development stormwater discharge to the wetland could affect the long-term form and function of the wetland ecosystem. [...] Based on the proposed grades and the seasonally high groundwater results documented in the Hydrogeological Assessment (Stantec 2019) and the updated water balance memo (Appendix D), the proposed lot level infiltration trenches are designed to maintain at least one meter of separation from the bottom of the systems to the seasonally high groundwater level. [...] The maintenance access increases the impervious area slightly within the Subject Property to the south, but this increase was shown to not result in a significant change in the overall water balance nor affect the function of the rear-yard infiltration trench. [...] 5.1.1 Feature Boundaries As discussed in the original EIS, the portion of the onsite wetland east of the existing driveway was partially removed as part of the development of the 246 Arkell Road subdivision in 2010. [...] This would require the developers of VPV to run the trail easterly through existing backyards or encroach into the north edge of the Ecological Linkage to meet the road crossing, thus increasing the footprint of impact on the linkage area.