Water Treatment Plant Phase 1 Upgrades CMAR Selection Pre-Submittal - - PowerPoint PPT Presentation

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Water Treatment Plant Phase 1 Upgrades CMAR Selection Pre-Submittal - - PowerPoint PPT Presentation

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Water Treatment Plant Phase 1 Upgrades CMAR Selection Pre-Submittal Meeting October 12, 2017 Water Treatment Plant Phase 1 Upgrades 22 mgd WTP Expand capacity to 32 mgd Upgrades to most processes Only minor improvements to

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SLIDE 1

Water Treatment Plant Phase 1 Upgrades CMAR Selection Pre-Submittal Meeting

October 12, 2017

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SLIDE 2

Water Treatment Plant Phase 1 Upgrades

  • 22 mgd WTP
  • Expand capacity

to 32 mgd

  • Upgrades to

most processes

– Only minor improvements to

  • zone, PI, and

lagoon

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SLIDE 3

Facility Expansion Site Layout

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SLIDE 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

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SLIDE 5
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SLIDE 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)

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SLIDE 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.

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SLIDE 8

WTP Upgrades – Enlarged Plan

= Phase 1

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SLIDE 9

Raw Water Contactor

  • 56,000 Gallon Raw

Water Contactor

– Provides sufficient sodium permanganate contact time

  • Designed to

accommodate future use as Pre-ozonation contactor

= Phase 1

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SLIDE 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

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SLIDE 11

Coagulation, Flocculation, and Clarification

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SLIDE 12

SuperPulsator

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SLIDE 13

Sludge Hopper 36” Influent Riser Distribution Flume Collection Flume

SuperPulsator

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SLIDE 14

Ozone Improvements

  • Replace Gas

Flowmeters (GOX meters)

  • Add O3 monitoring to
  • ff-gas to monitor

transfer efficiency

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SLIDE 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

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SLIDE 16

New Filters

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SLIDE 17

New Filters

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SLIDE 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

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SLIDE 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

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SLIDE 20

High Service Pump Station Upgrades

  • Finished Water Pumps

– Impeller retrofit and motor upgrade – No. 4

  • Install vortex suppression
  • Implement suction piping improvements
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SLIDE 21

Improvements to Chemical Bulk Storage

Hypo Hypo Hypo 32 32 38 45 Fl

Additional Containment for Fluoride Additional Pump for Permanganate

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SLIDE 22

New Chemical Bulk Storage Building

32 32 32 32 38 45

ALUM CAUSTIC ORTHO

32 32 32 38 / 45

DECHLOR

Mech Room Elec Room Chem Unloading

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SLIDE 23

New Chemical Bulk Storage Building

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SLIDE 24

Improvements to Existing Chemical Feed

Additional Pumps for Hypo Larger Capacity Pumps for Caustic

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SLIDE 25

New Pre-Chemical Feed Facility ALUM CAUSTIC

POLYMER

Adjacent to SuperPulsators

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SLIDE 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

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SLIDE 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 2nd

floor

  • Add Operations Supervisor Office and

Storage in Filter Gallery

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SLIDE 28

Electrical Upgrades

  • New electrical power distribution - medium

voltage primary loop to new facilities

– Pre-Chemical Facility – Clearwell Pump Station

  • Install 4th electrical utility transformer
  • Electrical modifications to provide

redundancy in key areas

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SLIDE 29

QUESTIONS