DDW-2024-007590

May 15, 2024
David C Norman
Lehi City
2538 North 300 West
Lehi, Utah 84043
Subject:Concurrence, Updated Drinking Water Source Protection Plans for the listed water sources; Lehi City
Dear David C Norman:
The Division of Drinking Water (the Division) received the updated Drinking Water Source Protection (DWSP) plans for the listed well sources from Gary Thomas of the Lehi Water Department
on October 28, 2021. The Division received the updated DWSP plans for the listed spring sources from your consultant, Wood Miller, on August 10, 2023.
We have completed our review of the updated DWSP plan and find that the plan basically complies with the applicable portions of Utah’s Administrative Rules for Public Drinking Water
Systems. The Division concurs with this updated plan. We commend you for establishing a program to protect these sources from present and future contamination. This plan must be updated
often enough to ensure that it reflects current conditions in your protection zones.
The due date for submitting the next updated plan for wells is December 31, 2026.
The due date for submitting the next updated plan for springs is December 31, 2029.RemindersAs stated in R309-600 and 605: Implementing DWSP Plans - Each Public Water System (PWS) shall
begin implementing each of its DWSP Plans in accordance with the implementation schedule within 180 days after submittal if the plan is not disapproved. Be prepared to describe these
efforts in your next update, which should include documentation of how the land management strategies identified for existing and future potential contamination sources were implemented.
Your updated plan will be disapproved, and 25 Improvement Priority System (IPS) points will be assigned for failure to comply with this requirement.As stated in R309-600 and 605: Recordkeeping
- As a DWSP Plan is executed, the PWS shall document any land management strategies that are implemented. Please provide actual copies of memoranda of understanding, public education
programs, bill stuffers, newsletters, or other correspondence documenting the implementation of each land management strategy as it occurs, in this section of your updated plan.
Monitoring Reduction Waivers
You requested susceptibility waivers be renewed for the 500 West Well (WS001), 1200 East Well (WS007), Dry Creek Well (WS010), and the Airport Well (WS013). Your request for a renewal
of the susceptibility waivers for volatile organic contaminants (VOCs) and pesticides has been granted for these sources. This does not change the monitoring requirements for these sources.
You requested susceptibility waivers for volatile organic contaminants (VOCs) and pesticides for the Gray Well (WS014) and Mitchells Hollow Well (WS015). These sources are not eligible
for susceptibility waivers, because the requirements of R309-600-16(4) have not been met. These sources are considered unprotected and therefore do not meet the requirements. However,
following years of no VOC detections, the Mitchells Hollow Well (WS015) qualifies for reduced VOC monitoring under a reliably and consistently waiver. A VOC sample from the Mitchells
Hollow Well (WS015) is now required once every three years.
You requested to renew the use waivers for pesticides for the School House Spring (WS005), Hamongog Spring (WS006), and Birch Spring (WS008). These sources are not eligible for use waivers
for pesticides or VOCs because the requirements of R309-600-16(3) have not been met. Due to the presence of residential properties, it can be assumed that pesticides and VOCs are likely
used, disposed of, stored, or transported within the management area.
Since a pesticide monitoring schedule was not previously assigned to the grouped source sample station representing the School House Spring (WS005), Hamongog Spring (WS006), and Birch
Spring (WS008) (identified as Sampling Station - 05 06 08 (SS994)), there is insufficient data to place the grouped source sample station (SS994) on reduced pesticide monitoring. Beginning
on July 1, 2024, a pesticide sample will be required every quarter until four (4) quarters of pesticide samples have been collected. If the results show no pesticide detections, the
pesticide requirement can be reduced to two (2) pesticide samples every three years.
The changes described above are reflected in the enclosed monitoring schedule. A current copy of the systems monitoring requirements can be found anytime online at waterlink.utah.gov.
Please contact David Kruse at [e-mail] or 385-566-7789 with any questions or concerns about the systems source monitoring requirements or to request reduced monitoring.
Use and susceptibility waivers must be renewed every six years with your updated source protection plan, by submitting an updated waiver statement. If the update is not received, your
waivers may lapse and your monitoring schedule will change.Please contact Noah Zorsky at [phone] or via email at [e-mail] if you have questions or concerns about the review
of your DWSP plan. To help us serve you more efficiently, please use the water system number (25015) in your correspondence.
Sincerely,
Michael Newberry, P.E.
Permitting and Engineering SupportManager
NAZ/mrn/mdb
Attachment:Updated monitoring schedulecc:Daymon Swenson, Utah County Health Department, [e-mail] C Norman, Lehi City, [e-mail] Zorsky, P.G., Division
of Drinking Water, [e-mail]
David Kruse, Division of Drinking Water, [e-mail]
NZorsky 25015 Wells and Springs Update Concur