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Metropolitan Wastewater Management Commission Capital Improvement Program <br />TERTIARY FILTRATION - PHASE 2 <br />Description: <br />Thephased work program will install infrastructure/support facilities for 30 mgd of filters <br />for tertiary filtration of secondary treated effluent. Phase 2 is planned to install filter <br />system technology sufficient for another 10 mgd of treatment that will increase the total <br />filtration capacity to 20 mgd. The Phase 3 project will install the remaining filtration <br />technology to meet the capacity needs identified in the 2004 MWMC Facilities Plan. <br />In January 2016, the project scope and cost (estimate $530K in 2015) increased to <br />include updating electrical switchgear, and install tertiary filter flushing headers/pipe <br />vents. <br />Status: <br />Tertiary Filtration (Phase 2) project is anticipated to start design development in fiscal <br />year 21-22. <br />Justification: <br /> The 2004 MWMC Facilities Plan proposes phasing filters on a phased work program. <br />Filtration provides high quality secondary effluent to help meet permit requirements and <br />potential Class A recycled water. <br />Project Driver: <br />Performance reliability to meet the dry weather NPDES total suspended solids limits of <br />less than 10 mg/L, reuse development, and compliance with effluent limits during peak <br />flow conditions. <br />Project Trigger: <br />NPDES permit compliance for total suspended solids (TSS): Dry weather maximum <br />month flow in excess of 49 mgd. Also, provide higher quality effluent so that reuse <br />options can be developed. Continue to monitor the MWMC NPDES permit renewal <br />timing and requirements. <br />Improvement <br />SDC Eligibility: <br />41.6% <br />Estimated Project Cost <br />: $16,000,000 <br />Estimated Cash Flow: <br />FY 21-22 = $1,500,000; FY 22-23 = $5,800,000; FY 23-24 = $8,700,000 <br />Prior2017-18 <br /> Expenditure/Category:YearsEst. Act.2018-192019-202020-212021-222022-23Total <br /> Design/Construction$0$0$0$0$0$2,000,000$14,000,000$16,000,000 <br /> Other$0$0$0$0$0$0$0$0 <br />Total Cost$0$0$0$0$0$2,000,000$14,000,000$16,000,000 <br />Page 51FY 18-19 BUDGET AND CIP <br /> <br />