Cleaning and Restoring Water Resources for Our Communities Center - - PowerPoint PPT Presentation

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Cleaning and Restoring Water Resources for Our Communities Center for Environmental Law and Policy December 5, 2019 Wendy Steffensen Environmental Project Manager LOTT Clean Water Alliance What is LOTT? Regional wastewater utility L

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Cleaning and Restoring Water Resources for Our Communities

Center for Environmental Law and Policy December 5, 2019 Wendy Steffensen Environmental Project Manager LOTT Clean Water Alliance

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What is LOTT?

 Regional wastewater utility

Lacey
Olympia
Tumwater
Thurston County

 Governmental, non-profit corporation  Population served = 125,000

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Seattle Olympia and Budd Inlet Treatment Plant

Where is LOTT?

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Budd Inlet Treatment Plant

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Budd Inlet Reclaimed Water Plant Martin Way Reclaimed Water Plant

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Reclaimed Water

 Treated to a very high standard:

Class A Reclaimed Water

 Highly regulated and monitored  Approved for any use except drinking

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Why Reclaimed Water?

Public Values:

 Meet future wastewater needs  Treat wastewater as a valuable resource  Maximize benefits to the environment  Provide multiple community benefits

Long-Term Strategy:

 Expand production and use of reclaimed water  Use reclaimed water to replenish groundwater

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Reclaimed Water Program Framework

LOTT

as the Generator Lacey Olympia Thurston County Tumwater

Use Use

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Hawks Prairie Ponds and Recharge Basins

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Reclaimed Water Strategy

Original Strategy

Wastewater system capacity as primary driver

► Timing dependent on TMDL and other factors ► Expand incrementally over time ► Small reclaimed water satellite plants

throughout service area

New considerations

Centralized facilities are more cost effective Additional drivers for expansion:

► Partners need for reclaimed water ► Additional community benefit

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Reclaimed Water Strategy

► Treatment

Quality and Quantity?
New facility?
Additional treatment?

► Conveyance and Disposition?

Use or infiltration site?
What location?
Length of pipeline?

► Master planning to update strategy in 2020

Department of Ecology TMDL
Reclaimed Water Infiltration Study results
Partner Needs
WRIA 13 Watershed Restoration Needs

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Reclaimed Water Project Ideas

► Groundwater infiltration

Above ground basins
Subsurface perforated pipe

► Wetland augmentation ► Streamflow augmentation

Budd Inlet Reclaimed Water Plant Henderson North Site Henderson South Site South Deschutes Site Tumwater Tank

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Opportunities and Barriers

Opportunities:

► Planning effort coincides with:

Ongoing work to locate infiltration sites
Phase two master planning in 2020
RWIS conclusion in 2020

► Multiple community benefits

Meet future LOTT system capacity needs
Offset impacts of water withdrawals

Barriers:

► Sites that meet multiple benefits challenging to find ► Cost of conveying water is high

Pipeline
Pumping costs

► Timing may not align for LOTT and offset projects ► Temperature can be an issue for streamflow

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Questions?

Wendy Steffensen

Environmental Project Manager wendysteffensen@lottcleanwater.org

lottcleanwater.org

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Reclaimed Water Infiltration Study

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What chemicals are present in wastewater, reclaimed water, groundwater, and surface waters?

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When reclaimed water is used to replenish groundwater, what happens to residual chemicals?

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Are there risks to public health and the environment?

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What can be done to reduce those risks?

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Reclaimed Water Infiltration Study

2015- 2017

Water Quality Characterization

2018- 2019

Treatment Effectiveness Evaluation

2019

Risk Assessment

2019- 2020

Cost Benefit Analysis

2020

Community Conversations