Water Treatment Plant Phase 1 Upgrades CMAR Selection Pre-Submittal Meeting
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1 Water Treatment Plant Phase 1 Upgrades CMAR Selection Pre-Submittal Meeting October 12, 2017
2 Water Treatment Plant Phase 1 Upgrades 22 mgd WTP Expand capacity to 32 mgd Upgrades to most processes Only minor improvements to ozone, PI, and lagoon
3 Facility Expansion Site Layout
4 Raw Water Intake Intake screens will require repair or replacement to resolve recent failures Hazen conducting further investigations Construction may require temporary pumping systems and cofferdams around the screens
5
6 Raw Water Pump Station Upsize intake piping and pump discharge header to 42-inch Raw Water Pumps Impeller retrofit - No. 1, 3, and 4 Replace Motor - No. 4 Install vortex suppression Install parallel RW pipelines to PI and bypass to WTP ~2,000 ft of 30-inch ~1,600 ft of 48-inch (PI to Rapid Mix)
7 Modifications to Existing PI Raise outlet structure in Pre-Sedimentation Impoundment to expand supply range and provide the ability to draw from a range of water quality zones.
8 WTP Upgrades Enlarged Plan = Phase 1
9 Raw Water Contactor = Phase 1 56,000 Gallon Raw Water Contactor Provides sufficient sodium permanganate contact time Designed to accommodate future use as Pre-ozonation contactor
10 Coagulation and Sedimentation Existing Increase raw water venturi meter and flow control valve size Install finger weirs in the existing sedimentation basins New Train New vertical rapid mix facility (single stage) with parallel basins. 2 basins expandable to 3 in the future New 10-mgd SuperPulsator basin
11 Coagulation, Flocculation, and Clarification
12 SuperPulsator
13 SuperPulsator Sludge Hopper 36 Influent Riser Collection Flume Distribution Flume
14 Ozone Improvements Replace Gas Flowmeters (GOX meters) Add O 3 monitoring to off-gas to monitor transfer efficiency
15 Filter Upgrades & Backwash Supply Line 4 new single cell filters (544 sf) Install new BW supply header in filter gallery Backup Backwash Supply Install PRV on backwash line from high service pump header
16 New Filters
17 New Filters
18 New Clearwell Pump Station New facility at NW Corner of WTP site 3 new clearwell pumps drawing from a wet well 54-inch transmission suction piping from new filters to CWPS 36-inch discharge piping from CWPS to Ground Storage Tanks
19 FW Storage Improvements Modify existing tanks with curtain baffling Install 1 new 3-MG clearwell tank with Inset-C shotcrete baffling New 36-inch yard piping to HS Pump Station New 24-inch Clearwell drain piping
20 High Service Pump Station Upgrades Finished Water Pumps Impeller retrofit and motor upgrade No. 4 Install vortex suppression Implement suction piping improvements
21 Improvements to Chemical Bulk Storage Fl Hypo Hypo Hypo Additional Pump for Permanganate Additional Containment for Fluoride
22 New Chemical Bulk Storage Building ALUM CAUSTIC ORTHO / DECHLOR Chem Unloading Elec Room Mech Room
23 New Chemical Bulk Storage Building
24 Improvements to Existing Chemical Feed Larger Capacity Pumps for Caustic Additional Pumps for Hypo
25 New Pre-Chemical Feed Facility Adjacent to SuperPulsators ALUM CAUSTIC POLYMER
26 Residuals Management Improvements Construction of parallel 16- inch pipeline to lagoon Improvements to redistribute solids into lagoon Addition of road to lagoon for dewatering equipment access
27 Architectural Upgrades Break Room: new finishes and casework Lab: Minor changes to layout, new finishes and casework Control Room: modify layout Expand women s restrooms on 1st and 2 nd floor Add Operations Supervisor Office and Storage in Filter Gallery
28 Electrical Upgrades New electrical power distribution - medium voltage primary loop to new facilities Pre-Chemical Facility Clearwell Pump Station Install 4 th electrical utility transformer Electrical modifications to provide redundancy in key areas
29 QUESTIONS
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