Laserfiche WebLink
demand of 23.18 mgd will cause any adverse impacts to water resources, environmental resources, and <br />other legal users. <br />After the CONSULTANT received notice -to -proceed for WO No. 5 and the project kickoff meeting was <br />held with the OWNER, the OWNER requested that additional modeling simulations be conducted to <br />determine the withdrawal flow split between the north and south wellfields. Also, the OWNER <br />requested approval from the SJRWMD to use the existing groundwater models developed by the <br />CONSULTANT in 2016 for the 2020 CUP modification. On January 13, 2020, SJRWMD provided approval <br />for the use of the model but requested that a revised/updated groundwater modeling plan be <br />submitted to the District for review and approval. These items were not included in WO No.5. <br />This Amendment has been developed to provide the additional groundwater modeling services <br />requested by the OWNER. <br />SCOPE OF WORK <br />The following is a description of the work to be provided under this Amendment. <br />TASK 1- ADDITIONAL GROUNDWATER MODELING SIMULATIONS <br />The CONSULTANT will perform two additional groundwater model simulations with the modified ECFM <br />for the increased UFA allocation to determine the flow split between the north and south county WTP <br />wellfields for the proposed 2050 EOP withdrawal. The CONSULTANT will also perform a third additional <br />groundwater model simulation requested by SJRWMD referred to as "pumps off", which will be used for <br />the cumulative pumping impact scenario as described below. The modified ECFM model was used <br />during previous permit modification attempt in 2016 and has been approved by SJRWMD for use in <br />support of the current CUP modification. <br />The two (2) groundwater modeling simulations will be performed using the End -of -Permit (EOP) <br />withdrawals for all permitted users and IRCU wells pumping at the requested allocation increase of <br />23.18 mgd. A detailed description of these two simulations are listed below: <br />1. Simulation 4 (SIM4) — Existing and proposed IRCU Hobart Park WTP wells will be pumped at <br />23.18 mgd and other legal user wells within the model domain pumping at their current EOP <br />withdrawal rate, except for the agricultural use wells whose EOP allocations will be adjusted to 5 <br />in 10 -year factors provided by SJRWMD. The CONSULTANT has received a GIS shapefile from <br />SJRWMD containing EOP withdrawals for all permitted users within the model domain. <br />2. Simulation 5 (SIMS) — Existing and proposed IRCU South County WTP wells will be pumped at <br />23.18 mgd and other legal user wells within the model domain pumping at their current EOP <br />withdrawal rate, except for the agricultural use wells whose EOP allocations will be adjusted to 5 <br />in 10 -year factors provided by SJRWMD. <br />3. Simulation 6 (SIM6) — All Existing Legal User withdrawals in the model domain are set to zero <br />("pumps off"). Simulated groundwater elevations from the cumulative EOP withdrawals for all <br />Existing Legal Users in the model domain are subtracted from the simulated groundwater <br />elevations from the "pumps off" simulation to calculate cumulative groundwater level <br />drawdown. <br />Smith Page 2 of 4 ;;2688_Exhlblt Adocx <br />