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File #: 19-0997    Version: 1
Type: report Status: Filed
File created: 10/25/2019 In control: Utility Advisory Committee
Agenda date: 11/7/2019 Final action: 11/7/2019
Title: LOTT Clean Water Alliance (LOTT) Reclaimed Water Infiltration Study Update
Attachments: 1. RW background and study_UAC_110719.pdf
Title
LOTT Clean Water Alliance (LOTT) Reclaimed Water Infiltration Study Update

Recommended Action
None. Briefing only.

Report
Issue:
LOTT produces Class A Reclaimed Water from treated wastewater. Class A Reclaimed Water is approved for any use, except for drinking. Production and reuse of reclaimed water is key to LOTT's long-range plan for managing our communities growing demand for wastewater treatment capacity. Infiltration of reclaimed water to replenish groundwater is also part of that strategy, and is key to the City of Olympia's ability to fulfill the requirements of mitigation for the McAllister Wellfield water right.

Staff Contact:
Wendy Steffensen, Environmental Project Manager, LOTT, 360.528.5773
Eric Christensen, Water Resources Director, Public Works, 360.570.3741

Presenters:
Wendy Steffensen, Environmental Project Manager, LOTT
Lisa Dennis-Perez, Environmental Planning & Communications Director, LOTT

Background and Analysis:
LOTT provides services to treat and manage wastewater for the urban areas of Lacey, Olympia, and Tumwater. Since 2006, LOTT has also produced reclaimed water at the Budd Inlet Reclaimed Water Plant and the Martin Way Reclaimed Water Plant (MWRWP). The reclaimed water is used for irrigation and other non?drinking purposes. Some of the reclaimed water produced at the MWRWP is used to recharge (replenish) groundwater at infiltration basins on the LOTT Hawks Prairie Ponds and Recharge Basins and by the Cities of Olympia and Lacey to replenish Woodland Creek base flows by infiltrating reclaimed water at the Woodland Creek Groundwater Infiltration Facility.

Questions about infiltration of reclaimed water have been raised, including concerns regarding the fate and possible health and ecological impacts of certain types of chemicals that may remain in reclaimed water after treatment. These residual chemicals include pharmaceuticals, personal care products, and other organic chemicals typically found at very low concentrati...

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