biological nutrient removal process enhancement analysis of the … · 2015. 10. 8. · integrated...

1

WELCOME St. Johns County Utility Department

Integrated Water Resources Plan Final Stakeholder meeting October 8, 2015

Click to edit section Click to edit section Click to edit section

Utility Department – Bill Young, Gordon Smith, Larry Miller, Teri Shoemaker, Barry Stewart

Jones Edmunds – Mike Sulayman, Mark Nelson

CDM Smith – Dan Rodrigo, Shayne Wood

Stakeholders

Introductions


10:00 to 10:45 am Welcome and Introductions Overview of IWRP Goals, Features, and Process Performance Measures, Project Options, Model, Evaluation Recommended Plan Conservation, Water Supply/Transmission, Reclaimed Water

Break 10:45 to 11:00 am 11:00 am to Noon Conclusions Open Discussion Next Steps

Agenda


Provide a road map for short-term and long-term solutions

Ensure reliability with cost-effective and diversified sources of supply

Protect receiving water quality Operate facilities in an optimal manner Protect the natural environment Inform and collaborate with stakeholders Maintain consistency with regional water

supply plans

Integrated Water Resources Plan Goals


Features of IWRP

Strategic document for Utility Breaks down silos Illustrates interrelationships Shows trade-offs between

alternatives Considers risk and

Uncertainty Adaptive to change


Major goals of plan (e.g., provide dependable supply) Objectives

Metrics used to assess how well an objective is being achieved (e.g., total lifecycle cost)

Performance Measures

Individual projects or management measures/activities Options

Combinations of options that best meet the objectives, and will be evaluated against metrics Alternatives

IWRP Terms


Maximize alternatives that are easy to permit, maintain and have customer’s acceptance Implementation

Maximize recycling water and minimize ecological impacts Environmental

Reduce nutrients to receiving waters and changes to groundwater quality Water Quality

Minimize rate impacts to customers Cost

IWRP Objectives

Provide dependable water supply source Reliability


IWRP Process

Define Planning

Objectives & Metrics

Refine Analysis (create

hybrids)

Analyze Alternatives

(STELLA)

Raw Performance Score Card

Rank Alternatives

Identify Options (building blocks)

Build Integrated Alternatives

Develop Strategy


Wells and Water Treatment Interconnects Reclaimed Water Conservation Stormwater Harvesting Recovery and Prevention

Projects Desalination St. Johns River

Project Types and Options


Building Options into Alternatives

Select options that best meet theme: • Baseline • Low Cost • Reliable • Sustainable

1st Pass

2nd Pass

Develop hybrids to improve performance: • Low Cost +

Reliable • Reliable +

Sustainable

Incorporate stakeholder feedback: • Hybrid 1 • Hybrid 2 • Hybrid 3

Test sensitivity and develop preferred plan: • Population

Growth • Climate • Regulations

3rd Pass 2nd Pass

Final


Alternatives Developed Around Themes

Low Cost – includes options that have lowest cost

High Reliability – includes options that provides high levels of new supply

High Sustainability – includes options that provide environmental benefits

Hybrids – versions of Low Cost and High Reliability themes


Integrated System Model IWRP-SIM

12

Floridan Aquifer Supply

Non-Potable Water Demand

Potable

Wellfield

WTP

Alternative Water Supplies

New WTP

Water Conservation

WWTP

Receiving Waters

Reuse

Existing & New

New

Stormwater Capture


SJCUD Specific

JEA Interlocal

Northeast 1. JEA 2. NW finished water 3. Local WTP 4. Export WW to NW 5. Develop local source Ponte Vedra

1. PV WTPs 2. Export Water to NE

Northwest 1. Expand WTP 2. Expand WWTP 3. Implement residential reclaim 4. Develop new sources 5. Import WW from NE 6. Import finished NE water

SR16 1. NW finished water

Mainland & Anastasia Island

1. Expand CR214 WTP 2. NW finished water via SR16 3. New local source for 214

South 1. NW or Mainland finished

water 2. New South Plants 3. Palm Coast Interconnect

Key Existing Potential Water Wastewater Reclaimed Water


Basis of Final Plan – Low Cost Plus

0.19

0.18

0.20

0.20

0.13

0.20

0.20

0.12

0.17

0.19

0.14

0.14

0.14

0.13

0.13

0.10

0.12

0.09

0.09

0.08

0.13

0.09

0.09

0.08

0.11

0.13

0.10

0.11

0.06

0.09

0.06

0.16

0.08

0.05

0.08

0.07

0.12

0.05

0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7

Low Cost Plus

Low Cost

High Rel w/o Desal

High Rel w NW Transfer

High Sustainability

High Rel w St Johns River

High Reliability

No Options

Base Criteria Weights

Reliability Implementation Water Quality Cost Environmental


Ranking Sensitivity

Alternative Base Weights (All Equal)

Cost Weight Higher

Reliability Weight Higher

WQ & Env Weights Higher

Low Cost Plus 1 2 1 2 Low Cost 2 1 2 4

High Rel w/o Desal 3 5 3 3

High Rel w NW Transfer 4 4 4 5

High Sustainability 5 7 7 1 High Rel w St Johns River 6 6 5 6

High Reliability 7 8 6 7

No Options 8 3 8 8


Ponte Vedra Service Area Growth (Medium)

Generally built out

Population to grow by 2,600 people by 2040


Ponte Vedra - Gap

No Gap under Medium Conditions

2032 CUP Expires Max Withdrawals 7.0 MGD ADF


Main System Service Area Growth (Medium) Service Area Population

Growth by 2040

Mainland and Anastasia Island 30,786

Northeast 6,157 Northwest 33,426

South 8,796 SR 16 6,157 Totals 85,332


Main System – Gap

2024GAP 2.9 MGD

GAP 2040GAP 8.7 MGD

2024 CUP Expires Max Withdrawals 16.1 MGD ADF


IWRP Recommended Base Plan Options

to SR 16 WWTP

X 2030

Bas

e P

lan


IWRP Recommended Base Plan Options B

ase

Pla

n


IWRP Recommended Contingency Options

Clay Putnam MFL

X 2040


IWRP Recommended Contingency Options


Current Water Conservation Programs

Customer Education and Outreach

Tiered Rate Structure (started 2001)

Automated Meter Read (AMR) Technology

Aggressive Meter Monitoring, Tracking, Leak Detection

Expanding Reclaimed Water Program

Land Development Code (LDC) limits high-volume irrigation

Irrigation ordinance


Proposed Water Conservation Programs

SAV 2 & SAV 4 – By 2020: Soil Moisture Sensor Programs in Mainland & PV Systems

SAV 1 – Ongoing: Revisit High Volume

Irrigation Requirements

SAV 7 – By 2030 - Develop Conservation

Partnerships w/ Ag


Demand Management – Demand Monitoring via AMR and Improved Meter Technology – Capability to monitor usage every 15 minutes. – SJCUD proactively notifies customers of

abnormal or excessive usage. – Recently replaced 10,000 manual meters with

AMR meters in Ponte Vedra

Water Conservation


IWRP Recommended Base Plan

Water Supply and Transmission Options Northwest and South Water System

Interconnect (IW4)

Northwest and CR 214 Facility Expansions

(GW1 and GW3)

Well Optimization Study



Initial phasing will allow for water to transfer from NW grid to the Mainland grid.

Future phasing will allow for service to the Southern area from the Mainland grid to defer or possibly avoid construction of a South WTP.



CR 214 WTP is currently planned to expand from 8 MGD to 12 MGD around 2030 under medium growth projections (GW1)

NW WTP is currently planned to expand from 6 MGD to 9 MGD around 2022 under medium growth projections (GW3)



Well Optimization Study A well optimization study was performed during the

IWRP development. Study evaluated existing Northwest and Tillman

Ridge (CR 214) wellfields for optimum performance under current and projected conditions.

General strategy is to implement uniform/ reduced pumping (limited to 1 MGD per well)



Well Optimization Study

7.04

4.75 20156.26

7.1

5.07 20206.41

7.19

5.81 20256.72

10.59

6.04 20309.04

10.65 CR 214 KWH/KGal

6.11 2035 NW KWH/KGal9.11 Average KWH/KGal

- 1.0 MGD NW - CR 214 Trasnfer (existing pipe)- NW 4 and NW5 (Standby)- TR 50 (standby)- relaxed uniform pumping all the wells- 50% TR- RO

- NW 6- NW WTP sulfate treatment- relaxed uniform pumping all the wells- 50% TR- RO

- New NW transmission line and booster pump- NW 7 and NW 8- NW WTP expansion (FDEP permit)- relaxed uniform pumping all the wells- 50% TR- RO

- NW 9 - New RO expansion (2MGD)- NEW CUP (increase)- relaxed uniform pumping most wells- 70% TR- RO

- NW 10 - TR 51- relaxed uniform pumping all the wells- 70% TR- RO

Optimized Plan Actions



Reclaimed Water Supply Options – Overview

Focus on areas of new development Plan to implement Mandatory Reclaimed Water

Service Zones (see draft map) Service Areas:

– NW/SR16 (RW2) – AI/Mainland (RW1) – South (RW3)



NW/SR 16 Reclaimed Water Service Area (RW2) Fastest growing service area. Area Served by interconnected NW & SR16

system Current SJCUD Capital Investments:

– NW WWTP (“Water Reclamation Facility”) – NW, Turnbull, and SR 16 Reclaimed Water Tanks – International Golf Parkway Reclaimed Water

Pipeline



Anastasia Island/Mainland Reclaimed Water Service Area (RW1)

Constructing 1 MG Tank at Anastasia Island WWTP to facilitate expansion of reuse.

Local area buildout is a challenge. Initial 2 mile radius focus for new customers. Goal to reduce nutrient discharge to Matanzas

River.



Reclaimed Water Supplementation NW/SR 16 Service Area demand to exceed supply

between 2020 and 2025.

Fox Creek Regional SW Facility (RW6) Originally scoped to supplement AI WWTP. SR 16 WWTP connection and supplementing

higher demands in NW Service Area.



Stormwater Harvesting Opportunities Florida Department of Transportation

– I95 Expansion (RW8) – SR 313

St Johns County Public Works – CR 2209 – Future Stormwater projects


General Conclusions

Traditional water supplies are not enough to meet 2040 demands.

Conservation alone will not defer the need to develop alternative water supply strategies.

Plan is very sensitive to growth in South.

Desalination and St. Johns River are not preferred strategies, but partnerships are required to avoid these alternatives.


Schedule and Next Steps

Public Comment Period ended – July 2015 Present Final Plan @ Stakeholder meeting

– October 8, 2015 Update Plan based on comments received

– October 2015 Present IWRP to BOCC in November


Additional Information about the IWRP

Please visit our website www.co.st-johns.fl.us/Utilities/IWRP.aspx Background Previous Workshop Information Additional Information Final IWRP Report Today’s presentation

43

For Additional Information http://www.co.st-johns.fl.us/Utilities/IWRP.aspx

Please send e-mail comments to

[email protected]

biological nutrient removal process enhancement analysis of the … · 2015. 10. 8. · integrated...

Documents