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4.8 Phase 1 impact <br /> As these phase 2 models also included some alterations that could potentially impact phase 1 lakes (e.g. <br /> the lake 12 connection to the Phase 2 pump station), the peak water surface elevation for both model <br /> scenarios was compared to a few of the Phase 1 modelling results. <br /> The most accurate comparison would be a comparison with Alt 1-Farm Pump-D-48 and Alt 1-Gravity-D- <br /> 48 as the "Alt 1" models have two (2) pumps active at the lake 3 pump station (pump station A) as does <br /> the "Alt6" configuration for the modeling results presented in this report. Furthermore, a comparison with <br /> the Phase 2 pump station scenario (PS) would be best done with both the "Gravity" and the "Farm Pump" <br /> scenarios. As the model configurations "Alt 1-Farm Pump-D-48" or"Alt 1-Gravity-D-48" were not analyzed <br /> as a part of the Phase 1 stormwater modelling, the comparison have been made with following Phase 1 <br /> model configurations: <br /> • Alt 1- Farm Pump-B-48 <br /> • Alt 1- Farm Pump-C-48 <br /> • Alt 1- Gravity-B-48 <br /> • Alt 1- Gravity-C-48 <br /> • Alt 2- Gravity-D-48 <br /> The comparison can be found in in Appendix G. Details on the Phase 1 model configuration <br /> nomenclature not used for the Phase 2 model configurations presented in this report, as well as detailed <br /> Phase 1 model configuration results can be found in the Stormwater Analysis Report-River Islands Phase <br /> 1 Stormwater Mitigation, Revision 2 dated April 2020. <br /> River Islands Phase 2 Stormwater Mitigation Rev 2 28 O••ft_%__� <br /> PACE <br />