HomeMy WebLinkAboutA006 - Resolution approving the purchase of UV disinfection parts and supplies for the Water Pollution Control Facility from Trojan Technologies Corp in the amount of $57,145.10ITEM #:6
DATE:12-23-25
DEPT:W&PC
SUBJECT:PROCUREMENT OF UV DISINFECTION PARTS AND SUPPLIES AT WATER
POLLUTION CONTROL FACILITY
COUNCIL ACTION FORM
BACKGROUND:
In 2010, the Water Pollution Control Facility's (WPCF) National Pollutant Discharge
Elimination System (NPDES) Permit required installation of a disinfection system for effluent
prior to release into the receiving stream. The WPCF utilizes ultraviolet (UV) light technology
to disinfect the effluent. UV is critical to the treatment process, serving as the primary method
for deactivation of pathogenic organisms’ ability to reproduce and cause illness.
The effectiveness of a UV disinfection system depends significantly on the intensity of
UV radiation. The primary factor affecting the intensity is the age of the lamps which
have a limited life for effective treatment. As lamps age, the light intensity falls off and
reduces their efficiency. The manufacturer recommends replacement of the lamps after
12,000 hours of run time; approximately every two years. Additional wear and maintenance
parts requiring annual replenishment include quartz sleeves that protect the bulbs, ballasts,
and a specialized cleaning solution for the automatic sleeve cleaning system. Staff
recommends the purchase of the approximately half of the required lamps, quartz sleeves,
ballasts, and cleaning solution each year to help balance the costs between fiscal years.
In the past, staff has purchased aftermarket manufactured lamps but found that they worked
poorly and led to operational difficulties. Water and Pollution Control staff has worked with the
Purchasing Division to ensure that a single source purchase complies with the adopted
Purchasing Policies. The price quoted for replacement parts and supplies this year is
$57,145.10. Funding for this purchase is available from the $150,000 included in FY
2025/26 operating budget for equipment parts/supplies.
ALTERNATIVES:
1. Approve the single source procurement of OEM lamps and supplies from Trojan
Technologies Corp in the amount of $57,145.10.
2. Do not authorize the procurement of replacement UV lamps from Trojan UV at this time.
Failure to replenish the wear parts and supplies will eventually result in a violation of the
facility's discharge permit and increase pathogen levels in the South Skunk River.
CITY MANAGER'S RECOMMENDED ACTION:
As UV lamps age, the light intensity decreases and reduces their effectiveness in disinfection
of the effluent. Proper maintenance of the UV system helps protect the water quality in the
South Skunk River and ensures continued compliance with the Water Pollution Control
Facility's discharge permit. The Trojan Technologies Corp lamps have a proven track record of
disinfecting for the rated 12,000 hours when used in conjunction with their OEM quartz
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sleeves, ballasts, and cleaning solution. Therefore, it is the recommendation of the City
Manager that the City Council adopt Alternative No. 1 as described above.
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