Board 20 Feb 2020 Staff Report_So Y FS_ handouts2/19/2020
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SOUTH TAHOE PUBLIC UTILITY DISTRICT
Regular Board Meeting
Board Agenda Item 11.c.
South Y Feasibility Study
February 20, 2020
I. Bergsohn, PG, HG
“… receipt of funding under
this Agreement is not a
commitment to and does not
obligate the State Water Board
to provide funding for any
eventual construction/
implementation project.”
South Y Feasibility Study
Item Completion Date
Draft Feasibility Study (FS) Report Completed 2/18/2020
Prepare draft Interim Remedial Action Plan (IRAP) in-progress
Technical Advisory Committee (TAC) Review 2/28/2020
TAC Review Meeting 3/03/2020
Issue draft FS Report and IRAP for public comment 3/17/2020
Public Workshop 6 3/31/2020
Close public comment period 4/15/2020
Complete final FS and IRAP Reports 4/30/2020
2/19/2020
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ALTERNATIVE OPERATIONS PCE TREATMENT
EMERGENCY
WATER SUPPLY
1 – No Action
TKWC and LBWC PWS Wells
to meet average annual demands (2009 -2018).
Maintain current levels of VOC Treatment
(TKWC 2).
Operate LBWC 5 as lag well
(starting in 2021).
STPUD
2 - Targeted
Pumping/
Potable Re-Use
Maximize PCE mass removal.
TKWC and LBWC PWS Wells
to meet average annual demands (2009 -2018).
Increase VOC Treatment.
Operate LBWC 5 as lead well
(starting in 2021).
Install new Replacement Well and Groundwater Treatment System to meet
Drinking Water Standards.
STPUD
3 – Source
Conversion from
Groundwater to
Surface Water
Over next 15 years –
Attain permits, negotiate agreements and
complete design/construction and testing of a new surface water treatment plant to meet 4.4
MGD MDD for TKWC and LBWC water
systems.
TKWC and LBWC PWS Wells to
meet average annual demands (2009 -2018).
Over Next 15 years-
Maintain current levels of VOC Treatment
(TKWC 2).
Operate LBWC 5 as lag well (starting in 2021).
STPUD
REMEDIAL ALTERNATIVES
Discharge Option/20-Yr Costs
Potable Re-Use/ $11.1 M
To Waste (STPUD)/ $20.1 M
To Waste (STPUD; CSLT)/ $13.6 M
Targeted Pumping/Potable Re-Use
R1
2/19/2020
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LBWC expressed willingness to take lead as
Owner
Owner on future Prop 1 Implementation Grant Funding Application
Lead during the planning, permitting and construction of the new
Replacement Well and Water Treatment Facilities (“Facilities”)
Responsible for the on-going Operations & Maintenance (O&M) of
the new Facilities
Responsible for meeting all new regulatory monitoring and
reporting requirements
OWNERSHIP
R1 may produce as much 105 MG/year of
treated water for potable re-use.
This is in addition to the treated water which
will be produced by LBWC #5 to meet LBWC
water system demands.
In order to optimize PCE removal in the most
cost-effective manner, the treated water from
R1 will need to be consumed in the
neighboring TKWC and/or STPUD water
systems.
Excess Treated Water
2/19/2020
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Water Quality
StandardsMonitoringWater Quantity
District needsPurchase Price
2019 STPUD Water Production Cost: ~$3.10/1,000 CF;R1 Treated Water Production Cost: ~ $6.50/1,000 CF (initial estimate)
TermProject Life: 20-years
Other Considerations (?)Operational Roles and Responsibilities
Water Delivery (Point/metering/pressure)
Liability (Insurance/Indemnity)
TerminationIntegration with other District water supplies
Purchase Water Agreement
Complete Feasibility Study (by June 30, 2020)
Initial Environmental Checklists (CEQA- Initial Study; TRPA – Initial
Environmental)
Public Comment Process
Feasibility Study and IRAP Reports
Final Project Reports
Final Disbursement Requests
Enter into Discussions with Water Purveyors (following completion
of Feasibility Study)
Purchase Water Agreement
Prop 1 Implementation Grant Application (Round 3, Fall 2020 ?)
Next Steps
2/19/2020
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QUESTIONS