DWQ-2024-007860

Official Draft Public Notice Version Month Day, year
The findings, determinations, and assertions contained in this document are not final and subject to change following the public comment period.
FACT SHEET
STATEMENT OF BASIS
PROVO WATER RECLAMATION FACILITY
RENEWAL PERMIT: DISCHARGE, BIOSOLIDS & STORMWATER
UPDES PERMIT NUMBER: UT0021717
UPDES BIOSOLIDS PERMIT NUMBER: UTL-21717
MAJOR MUNICIPAL
FACILITY CONTACTS
Facility AddressMailing Address
1685 South East Bay BoulevardProvo City Water Reclamation
Provo, Utah 84606PO Box 1849
Provo, Utah 84603
Gary Calder, Director of Water Resources
[phone]
David Torgersen, Water Advanced Treatment Resource Recovery (WATRR) Manager
[phone]
DESCRIPTION OF FACILITY
The facility serves the City of Provo with an average design flow of 21 MGD, and a design population equivalent of 160,000. The facility is located at 1685 South East Bay Boulevard
in Provo City, Utah County, Utah, latitude 40o 12’ 45” and longitude 111o 39’ 00”, with STORET Number 499656.Provo’s wastewater treatment plant was originally constructed in 1954 and
was upgraded in 1978 and 1988 and is currently undergoing an upgrade.
The final build out for the current upgrade will include the installation of a membrane bioreactor system, which would include new process basins, associated piping and equipment, and
the repurposing of the four existing aeration basins for equalization and surge storage. The existing trickling filters and the existing secondary clarifiers are to be demolished. The
existing final clarifiers, filter building, and backwash tank would be decommissioned. The majority of the plant’s influent would flow to the existing influent junction structure, where
the flow would be directed to the existing headworks facilities. A new, in-plant lift station would be constructed to receive additional sanitary sewer flows from the area southwest
of the facility. Flow received at the new lift stations would be pumped directly to the existing headworks facility.
The existing coarse screening and grit removal facilities would continue to be used. The solids processing facilities would be refurbished as necessary for continued use, including the
primary sludge pump station, primary and secondary digesters, dissolved air flotation thickener (DAFT) tank, and dewatering facility. A biosolids aeration struvite control system would
be added to the existing solids stream process to promote the removal of phosphorous from the plant and to prevent struvite scaling.
Solids are handled by the following: one dissolved air flotation sludge thickener tank, two primary anaerobic sludge digesters with linear mixers, one unmixed secondary anaerobic sludge
digesters, a final secondary anaerobic sludge digester with a linear mixer, and two centrifuges. After the solids treatment the solids are land applied and/or composted.
SUMMARY OF CHANGES FROM PREVIOUS PERMIT
On June 1, 2021 Provo City was issued a renewed UPDES permit. The UPDES permit grantedProvo City a variance to the TBPEL rule. The City received avariance to the Rule before it went
into effect in 2020, allowing until January 1, 2025 to completeupgrades to its secondary process required for the plant to biologically achieve a 1 mg/L effluenttotal phosphorus (TP)
limit. As part of the PCWRF’s variance, the plant was required to meet anannual average effluent TP of 3.5 mg/L between January 1, 2020, and December 31, 2024.
The city was due to complete its upgrades in June 2024. However, due to construction delays and other unforeseen circumstances, the final completion date will now be March 31, 2025.
This obviously puts the facility past its original January 1, 2025 variance date. As a result, the TBPEL compliance date is now being moved to January 1, 2026. All other parameters in
the permit will remain unchanged.
DESCRIPTION OF DISCHARGE
Provo City has been reporting self-monitoring results on Discharge Monitoring Reports on a monthly basis. In the last five years Provo City has had a good compliance history, with minimal
violations. For more information regarding Provo City’s compliance history see the following website echo.epa.gov/effluent-charts#UT0021717. Outfall NumberLocation of Discharge Point001After
the chlorine contact basins at latitude 40o12’45”, longitude 111o39’00”. Total residual chlorine can be sampled at the sampling port 60 feet down stream from Outfall 001 at the property
boundary or at end of pipe before the effluent enters the receiving water.
RECEIVING WATERS AND STREAM CLASSIFICATION
The discharge flows into the Mill Race and thence to UtahLake. Mill Race is Class 2B, 3B, and 4, according to Utah Administrative Code (UAC) R317-2-13.5.c.:
Class 2B- Protected for secondary contact recreation such as boating, wading, or similar uses.
Class 3B- Protected for warm water species of game fish and other warm water aquatic life, including the necessary aquatic organisms in their food chain.
Class 4- Protected for agricultural uses including irrigation of crops and stock watering.
The permit limitations are listed in the following table:
Parameter
Effluent Limitations *a
Monthly Average
Weekly Minimum Average
Weekly Average
Daily Minimum
Daily Maximum
Flow, MGD
21.0
NA

NA
NA
NA
BOD5, mg/L
BOD5 Min. % Removal
25
85
NA
NA
35
NA
NA
NA
NA
NA
TSS, mg/L
TSS Min. % Removal
25
85
NA
NA
35
NA
NA
NA
NA
NA
E-Coli,
No./100mL
126
NA
157
NA
NA
TRC, mg/L *j
0.013
NA
NA
NA
0.022
Ammonia, mg/L
Summer (July – September)
Fall (Oct – Dec)
Winter (Jan – Mar)
Spring (Apr – Jun)
3.0
4.0
5.0
3.5
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA

NA
8.0
12.0
14.0
12.0
WET, Chronic Biomonitoring
January – March
April –– December
NA
NA
NA
NA
NA
NA
NA
NA
Pass, IC25 > 95% effluent
Pass, IC25 > 94% effluent
Oil & Grease, mg/L
NA
NA
NA
NA
10
pH, Standard Units
NA
NA
NA
6.5
9.0
Dissolved Oxygen (DO), mg/L
NA
6.0
NA
5.0
NANA – Not Applicable
Effluent Limitations Changes
Current
New
Parameter
Annual Average
Annual Average
Interim Total Phosphorous, mg/L
(Effective Jan 1, 2020 – December 31, 2025
No Limit
3.5
(Interim limit)
Final Total Phosphorous, mg/L,
(Effective Jan 1, 2026
No Limit
1.0
(Final Limit)
SELF-MONITORING AND REPORTING REQUIREMENTSThe self-monitoring requirements stated in the following table and are the same as in the previous permit.
The permit will require reports to be submitted monthly and quarterly, as applicable, on Discharge Monitoring Report (DMR) forms due 28 days after the end of the monitoring period.
Lab sheets for biomonitoring must be attached to the biomonitoring DMR.
Self-Monitoring and Reporting Requirements *a
Parameter
Frequency
Sample Type
Units

Total Flow *b, *c
Continuous
Recorder
MGD
BOD5, Influent *d
Effluent
5 x Weekly
5 x Weekly
Composite
Composite
mg/L
mg/L
TSS, Influent *d
Effluent
5 x Weekly
5 x Weekly
Composite
Composite
mg/L
mg/L
E. Coli
5 x Weekly
Grab
No./100mL
TRC
Daily
Grab
mg/L
pH
5 x Weekly
Grab
SU
Total Ammonia (as N)
5 x Weekly
Grab
mg/L
DO
5 x Weekly
Grab
mg/L
WET – Biomonitoring *f
Quarterly
Composite
Pass/Fail
Oil & Grease *e
When Sheen is Observed
Grab
mg/L
Total Dissolved Solids
Monthly
Composite
mg/L
Total Ammonia, *h
Monthly
Composite
mg/L
Orthophosphate, (as P) *h
Effluent
Monthly
Composite

mg/L
Phosphorus, Total *h
Influent
Effluent
Monthly
Monthly
Composite
Composite
mg/L
mg/L
Total Kjeldahl Nitrogen,
TKN (as N) *h
Influent
Effluent
Monthly
Monthly
Composite
Composite
mg/L
mg/L
Nitrite-Nitrate, NO3 *h
Monthly
Composite
mg/L
Metals, Influent *g, *i
Effluent
Quarterly
Quarterly
Grab/Composite
Grab/Composite
mg/L
mg/L
Organic Toxics, *i
Yearly
Grab
mg/L*aSee Definitions, Part VIII, for definition of terms.*bFlow measurements of influent/effluent volume shall be made in such a manner that the permittee can affirmatively demonstrate
that representative values are being obtained.*cIf the rate of discharge is controlled, the rate and duration of discharge shall be reported.*dIn addition to monitoring the final discharge,
influent samples shall be taken and analyzed for this constituent at the same frequency as required for this constituent in the discharge.*eOil & Grease sampled when sheen is present
or visible. If no sheen is present or visible, report NA.
*fIn the even calendar years Ceriodaphnia will be tested during the 1st and 3rd quarters and fathead minnows will be tested during the 2nd and 4th quarters. In the odd calendar years
fathead minnows will be tested during the 1st and 3rd quarters and Ceriodaphnia will be tested during the 2nd and 4th quarters.
*gNo metal limits are required at this time.*h Composite samples shall be 24 hour composites collected by use of an automatic sampler or minimum of four grab samples collected a minimum
of two hours apart. Unless the rule regarding sampling for nutrients is changed, then the rule must be followed.*I See Part II of this permit for additional requirements regarding
sampling for metals and organic toxics.*j The TRC limitation will only be applicable if chlorine is being utilized as disinfection on the effluent.
PERMIT DURATIONIt is recommended that this permit be effective for a duration of five (5) years.Drafted and Reviewed byLonnie Shull, Discharge Permit WriterUtah Division of Water Quality,
[phone]PUBLIC NOTICEBegan: Month Day, YearEnded: Month Day, YearComments will be received at: 195 North 1950 West PO Box 144870 Salt Lake City, UT 84114-4870The Public Noticed
of the draft permit was published in the (NEWSPAPER OF RECORD FOR AREA).During the public comment period provided under R317-8-6.5, any interested person may submit written comments
on the draft permit and may request a public hearing, if no hearing has already been scheduled. A request for a public hearing shall be in writing and shall state the nature of the issues
proposed to be raised in the hearing. All comments will be considered in making the final decision and shall be answered as provided in R317-8-6.12.ADDENDUM TO FSSOBDuring finalization
of the Permit certain dates, spelling edits and minor language corrections were completed. Due to the nature of these changes they were not considered Major and the permit is not required
to be re Public Noticed.Responsiveness Summary(Explain any comments received and response sent. Actual letters can be referenced, but not required to be included).