DDW-2024-010805

September 10, 2024
Cody Ben Valdez
East Carbon City
PO Box 70
East Carbon City, Utah 84520
Subject:Operating Permit, East Carbon Water Treatment Plant (TP003);
East Carbon City, System #04012, File #12617, SRF #3F1792
Dear Cody Valdez:This letter provides a summary of the Division of Drinking Water’s decision to issue an Operating Permit for the East Carbon Water Treatment Plant (identified as TP003
in the Division’s database). The letter includes the following sections and addenda:Operating Permit for East Carbon Water Treatment Plant (TP003)Project Overview (Addendum 1) Compliance
Strategy for Achieving Surface Water Treatment Goals (Addendum 2)Summary of Surface Water Treatment Monitoring and Reporting Regulations (Addendum 3)Operating Permit for East Carbon
Water Treatment Plant (TP003)
We have received the following information prior to issuing the Operating Permit for East Carbon Water Treatment Plant (TP003):
Certification of Rule Conformance with plan approval conditions by a professional engineer and changes made during construction were in conformance with rules R309-500 through 550.
As-built or record drawings.
Satisfactory bacteriological results as evidence of proper disinfection and flushing.
Evidence of O&M manual delivery.
Water quality data demonstrating effective treatment by TP003
A chlorine analyzer was added to the Sunnyside Tanks (ST005 and ST006) to monitor for parameters required to determine proper CT disinfection.
We have determined that all conditions for operating permit issuance have been met. On this basis, an Operating Permit for East Carbon Water Treatment Plant (TP003) is hereby issued
as constituted by this letter. You may now place this plant in service in your water system.
The East Carbon Water Treatment Plant (TP003) was constructed with the ability to feed permanganate. However, East Carbon must go through the plan approval and operating permit process
to add permanganate as a new chemical feed to the system. Permanganate must not be fed without Division approval.
Please maintain a copy of this letter with your permanent records for future reference. If this Operating Permit changes any of your monitoring requirements, the staff of the Water Quality
Monitoring and Standards Section will follow up to provide an updated monitoring schedule to you. Please contact Mark Berger, Water Quality Monitoring and Standards Manager, at (801)
641-6457 for assistance regarding the monitoring and reporting requirements for your water system.
If you have any questions regarding this Operating Permit, please contact Chris Martin, P.E., of this office, at [phone], or Michael Newberry, P.E., Permitting and Engineering
Manager, at [phone].
Sincerely,
Russell Seeley, P.E.
Assistant Director
CM/mrn/mdbEnclosuresAddendum 1. Project OverviewAddendum 2. Compliance Strategy for Achieving Surface Water Treatment GoalsAddendum 3. Summary of Surface Water Treatment Monitoring and
Reporting RegulationsAddendum 4. Summary of Source Monitoring Requirementscc:Orion Rogers, Southeast Utah Health Department, [e-mail] Merrial Johansen, Johansen & Tuttle Engineering,
[e-mail] Ben Valdez, East Carbon City, [e-mail] Krauss, East Carbon City, [e-mail] David Avery, East Carbon City, [e-mail]
Page, P.E., DEQ Southeast District, [e-mail] Martin, P.E., Division of Drinking Water, [e-mail] Kruse, Division of Drinking Water, [e-mail] Luke Treutel,
Division of Drinking Water, [e-mail] Sitara Federico, Division of Drinking Water, [e-mail] Jennifer Yee, Division of Drinking Water, [e-mail] Page, Ph.D.,
Division of Drinking Water, [e-mail] Heather Pattee, Division of Drinking Water, [e-mail] 04012 12617 TP003 OP - East Carbon Water Treatment PlantADDENDUM 1Project
Overview
East Carbon City Water System (UTAH#04012)
East Carbon Water Treatment Plant (TP003)
The Division of Drinking Water (the Division) received a request for an Operating Permit for the East Carbon Water Treatment Plant (TP003) from your consultant, Merrial Johansen, P.E.
on July 1, 2024. The Division of Drinking Water (the Division) issued Plan Approval for this project on August 1, 2022. The East Carbon Water Treatment Plant is identified as TP003 in
the Division’s database.
Our understanding of the project is that the proposed East Carbon Water Treatment Plant (TP003) will treat surface water from the Grassy Trail Intake (WS002) and will have a total plant
design capacity of 1,040 gallons per minute (gpm). However, only 520 gpm will be allowed for the determination of equivalent residential connections. It replaces the existing Grassy
Trail WTP (TP002).
The conventional water treatment plant was constructed with accessories and controls similar to other approved Aquafloc installations in Utah. The project includes two package-plant
treatment units housed in a new steel metal building, along with chemical feed systems, backwash tank, and pumps, on-site sodium hypochlorination, SCADA system, lighting and electrical
controls, geothermal heat system and solar panels for power generation, fencing, and site improvements. The existing on-site sodium hypochlorination unit was saved as a standby unit
within the East Carbon Water Treatment Plant (TP003). The waste streams from this treatment plant are managed by UPDES Permit #UTG 640012. The proposed septic system was approved by
Southeast Utah Health Department on April 6, 2022. The project was approved for funding through DWB and CIB under Loan #3F1792.
This treatment plant consists of the following processes:
Compliance filters — Conventional treatment technology through tapered energy flocculation and tube settler clarification followed by mixed media filtration. Treatment is accomplished
with chemical addition through a flash mixer followed by coagulation and settlement prior to filtration. The primary coagulant is Summa Chlor 750 (ACH) and the secondary coagulant (polymer)
is Magna Floc LT 7990.
The tube settlers and clarifier wash-down are cleaned by the AquaJet system which is a manual operation that occurs about twice a year. Raw water is used during this process. The system
is designed to protect the filter compartment through the following three steps:
The clarifier drain valve is left open for an extended period of time after the wash cycle to completely drain the clarifier basin.
A block-and-bleed valve system is used on the raw water supply line to assure that no raw water can enter the clarifier compartment during normal operation.
At the end of the wash down, the operator turns the AquaJet control switch to off and the plant mode switch will be turned to the run-to-waste position until the clarifier basin fills

up and the effluent turbidity is satisfactory.
Only one filter can be backwashed at a time and will only be initiated if sufficient water is available in the backwash tank. An interlock was programmed to provide time between supplying
the backwash tank and initiating a backwash cycle. The operator can manually initiate a backwash sequence. Also, backwash sequences can be initiated by the PLC based on differential
pressure, effluent turbidity, and filter run time. The filter backwash cycle is a completely automated process but can be adjusted by the operator. There are four steps to the backwash
cycle including water only, air/water, water only, and backwash rinse varying from 10 gpm/ft2 to 18 gpm/ft2. Flow rates and run times based on other Aquafloc installations in Utah.
Two trains will be installed with the Filter Tech package units:
Filters 1: Filter Tech Aquafloc; 1 train; 520 gpm per train
Filters 2: Filter Tech Aquafloc; 1 train; 520 gpm per train
Pre-chlorination – sodium hypochlorite injection available as needed through flash mix
Post-chlorination – sodium hypochlorite injection post-filtration
Disinfection CT:
In-Plant Water Line from Backwash Storage Tank
14-inch diameter backwash supply line – 470 feet with a peak flow of 270 gpm (baffling factor of 1.0) at chlorine residual of 1 ppm. CT is 13.9.
6-inch diameter in-plant supply line – 535 feet with a peak flow of 30 gpm (baffling factor of 1.0) at a chlorine residual of 0.6 ppm. CT is 15.7.
50,000-gallon backwash tank – 30 feet inner diameter at a depth of 1.5 feet (baffling factor of 0.1) at a chlorine residual of 0.8 ppm. The peak flow is anticipated to be 30 gpm. CT
is 26.
The in-plant supply line is fed from the bottom of the backwash tank while the backwash supply line is fed from 1.5 feet above the backwash tank floor.
A chlorine analyzer was installed on the plant effluent line for monitoring CT, pH, and temperature values.
An interlock was programmed to provide ample time between treatment and backwashing the filters to achieve adequate CT.
Total CT is 50.6.
Plant Effluent Water Line to Sunnyside Storage Tanks
Transmission Pipe –10,500 feet of 10-inch diameter and 400 feet of 12-inch diameter transmission line (baffling factor of 1.0) delivers water from the treatment plant to the Sunnyside
Steel Tank (ST005) and Underground Sunnyside Tank (ST006).
Storage Tanks – Sunnyside Steel Tank (ST005) and Underground Sunnyside Tank (ST006), each with a capacity of 500,000 gallons with a baffling factor of 0.1. You have indicated that the
tanks are always maintained at 50% capacity, which is necessary for achieving CT. As such, 250,000 gallons of effective storage volume for each of these tanks has been subtracted from
our database and can no longer be used in storage capacity evaluations for your system.
A chlorine analyzer was installed at the Sunnyside Storage Tanks for monitoring CT values after these tanks.
Total CT is 157.4.
Monitoring and Reporting locations:
Raw Water Analyzers consist of Hach, Surface Scatter TU 5300 low range turbidmeter, and Swan, AM1 QV Flow pH Analyzer. Each filter inlet has a McCrometer, UltraMag Model UM06 Flow Meter.
After each filter bed there is a Hach, Surface Scatter TU 5300 low range turbidmeter.
The combined filter effluent has a Hach, Surface Scatter TU 5300 low range turbidmeter and a McCrometer, UltraMag Model UM06 Flow Meter to measure the filtered flow rate. There is also
a Hach, CL17 120 V AC Free-Chlorine Residual Analyzer.
Analyzers for the end of Sequence 1 after the Sunnyside Storage Tanks includes the Hach, CL17 120 V AC Free-Chlorine Residual Analyze. ADDENDUM 2Compliance Strategy for Achieving Surface
Water Treatment Goals
East Carbon City Water System (UTAH#04012)
East Carbon Water Treatment Plant (TP003)Treatment Goals per Surface Water Treatment Rules
The East Carbon Water Treatment Plant (TP003) consists of two Filter Tech package treatment units utilizing tapered energy flocculation, tube settler clarification, mixed media filtration
treatment, and post-chlorination. If necessary, pre-chlorination and permanganate addition is possible through the flash mixer. The East Carbon Water Treatment Plant (TP003) was constructed
with the ability to feed permanganate. However, East Carbon must go through the plan approval and operating permit process to add permanganate as a new chemical feed to the system. Permanganate
must not be fed without Division approval. This plant is designed to meet the requirements of the surface water treatment rules, as incorporated into Utah’s Rules in R309. These surface
water treatment rules require removal and/or inactivation, expressed in terms of log10 credit, of Cryptosporidium, Giardia lamblia, and viruses through treatment techniques.
The Surface Water Treatment Rule (SWTR) requires:
3-log10 removal/inactivation for Giardia lamblia, and
4-log10 removal/inactivation for virus.
The Long Term 2 Enhanced Surface Water Treatment Rule (LT2ESWTR) established four bin classifications for Cryptosporidium based on concentration in the source water. If a water system
has source water classified in Bin 1, LT2ESWTR requires 2-log10 removal forCryptosporidium. If a water system has source water in Bin 2, Bin 3, or Bin 4, LT2ESWTR requires additional
treatment, disinfection, or inactivation for Cryptosporidium, as outlined in EPA’s “Long Term 2 Enhanced Surface Water Treatment Rule Toolbox Guidance Manual.”
The water source supplying this treatment plant is the Grassy Trail Intake (identified as WS002 in the Division’s database). Per the Division’s letter, issued on November 20, 2018, the
raw water source for this plant has been determined to be in Bin 1 based on the second round of sampling under LT2ESWTR. The Grassy Trail Water Treatment Plant is designed to meet the
Bin 1 requirements, i.e., 2.0-log10 removal for Cryptosporidium.
In the event additional log removal credit is needed for a higher Bin classification, additional treatment will need to be installed. New Plan Approval would be required for any additional
treatment.Compliance Strategy
Primary Filtration
The Division approves the East Carbon Water Treatment Plant (TP003) as a conventional treatment plant under the surface water treatment rule and grants 2.5-log removal for Giardia lamblia,
2-log removal for Cryptosporidium and 2-log removal for virus for the coagulation, flocculation, sedimentation, and filtration processes.
Per R309-200-5(a)(ii), the turbidity performance standard for this treatment plant is that the turbidity shall be less than 0.3 NTU 95% of the time and shall not exceed 1.0 NTU.
Disinfection
Disinfection process installed following the Filter Tech treatment units to provide additional treatment for meeting the Bin 1 surface water treatment goals:
Post chlorination at target residual of 1.0 ppm is provided for additional disinfection following the Filter Tech Aquafloc units. The East Carbon Water Treatment Plant (TP003) provides

disinfection by adding sodium hypochlorite. Post chlorination provides additional Primary Disinfection treatment to meet the log10 removal/inactivation of Giardia and Virus treatment
requirements for compliance with the Bin 1 Surface Water Treatment Rules. The following additional treatment will be provided by the Post chlorination process step:
0.5-log10 inactivation of Giardia
4.0-log10 inactivation of virus
The CT calculations, used to demonstrate the achieved log removal/inactivation by post chlorination, were based on the CT achieved from the backwash supply line from the proposed backwash
storage tank. In this case, the sodium hypochlorite is added to the effluent line which supplies the backwash storage tank and distribution system. The backwash storage tank has a 14-inch
diameter, 470-foot backwash line and 6-inch diameter, 535-foot in-plant supply line. The backwash tank is approximately 50,000 gallons but the minimum effective storage volume is utilized
at a depth of 1.5 feet. The in-plant supply line is fed from the bottom of the backwash tank while the backwash supply line is fed from 1.5 feet above the backwash tank floor. A baffling
factor of 0.1 is assumed for this tank. The chlorination CT calculations for the in-plant supply were determined using a minimum free chlorine residual of 0.8 ppm, a peak flow of 30
gpm and an effective storage volume of 7,926 gallons. An interlock will be programmed to provide ample time between processing raw water and backwashing the filters. The total CT is
50.6.
CT calculations were also provided for the distribution system and the Sunnyside Steel Tank (ST005) and Underground Sunnyside Tank (ST005) which is unchanged from the existing treatment
plant. The Point-of-Entry (POE) monitoring location is located at the Sunnyside Tanks. The chlorination CT calculations were determined using 10,500 feet of 10-inch diameter transmission
line, with a baffling factor of 1.0; 400 feet of 12-inch diameter water line, with a baffling factor of 1.0; and 500,000 gallons of storage dedicated for CT from the Sunnyside Steel
Tank (ST005) and Underground Sunnyside Tank (ST005), each with a baffling factor of 0.1. The chlorination CT calculations were determined using a minimum free chlorine residual of 0.6
ppm, a peak flow of 1/3 of 1,040 gpm and a combined effective volume of 93,964 gallons. The total CT is 157.4. The peak flow will likely be less than 350 gpm using one train.
Overall, the East Carbon Water Treatment Plant (TP003) design meets the required treatment for Cryptosporidium for surface water classified as in Bin 1 under R309-215-15 of Utah’s Rules.
The processes of the Filter Tech Aquafloc system and post-chlorination together will achieve the treatment goals of:
•3.0-log10 removal/inactivation required for Giardia lamblia,
•2.0-log10 removal/inactivation required for Cryptosporidium
•4.0-log10 removal/inactivation for virus.
ADDENDUM 3
Summary of Surface Water Treatment Monitoring and Reporting Regulations
East Carbon City Water System (UTAH#04012)
East Carbon Water Treatment Plant (TP003)
This addendum summarizes the monitoring and reporting regulations related to the East Carbon Water Treatment Plant (TP003). It is provided to you for informational purposes and may be
helpful in PLC and SCADA programming after the plant is constructed.
The actual monitoring and reporting requirements for this treatment plant will be provided to the water system by staff of the Water Quality Monitoring and Standards Section in the Division
of Drinking Water following the issuance of the Operating Permit.
This Addendum summarizes the monitoring and reporting regulations related to the East Carbon Water Treatment Plant (TP003).
Monthly Report — General
The East Carbon Citywater system (the System) is required to complete a monthly report for East Carbon Treatment Plant (TP003)using a template approved by the Division of Drinking Water
(the Division). As a minimum, the monthly surface water treatment plant report must include the following data and other applicable information.
Combined filter effluent (CFE) turbidity [R309-215-9(1)(a)]
Minimum chlorine residual of the treated water at the point of entry (POE)
Verification and calibration dates of turbidimeter(s)
Sufficient residual concentration, volume, flow, pH, and temperature readings in order to prove disinfection CT and/or Inactivation ratio demonstrating whether the log removal/inactivation
requirements are met R309-200-5(7), R309-215-15(19);
Submit the surface water treatment plant report for the entire month to the Division by the 10th of the following month. This report must be submitted by e-mail as an Excel file at [e-mail].
Please contact Sarah Page, PhD at [phone] or [e-mail] schedule training regarding proper reporting.
All operational records pertaining to the monthly surface water treatment plant reports shall be maintained for a minimum of 5 years. [R309-105-17]
Treatment Adequacy [R309-200-5(7), R309-215-15(19) and (20)]
Water systems using surface water or groundwater under the direct influence of surface water must provide treatment consisting of both disinfection and filtration. [R309-200-5(5)(a)]..
The surface water treatment plant monthly report must include both disinfectionand filtration processes. The monthly report shall contain sufficient information to indicate whether the
minimum surface water treatment requirements (i.e., log removal/inactivation of Giardia, virus, and Cryptosporidium) are met
Required Treatments Credit — The treatment credits required and granted for the processes in the East Carbon 1.5 MGD Surface Water Treatment Plant (TP003) are summarized below.
East Carbon City Water System (UTAH#04012)
East Carbon Water Treatment Plant (TP003)
Primary Treatment Technique: Conventional Filtration
Treatment Goals
(Minimum Treatment Requirements)
Giardia
Virus
Cryptosporidium
3-log removal / inactivation
4-log removal / inactivation
2-log removal
(Bin 1 source water)
Processes
Credit Granted

Conventional Filtration1
2.5-log removal
2-log removal
3-log removal
Chlorine2
0.5-log inactivation
4-log inactivation
Total Treatment Credit
3-log removal / inactivation
>4-log removal / inactivation
2-log removal / inactivation
Granted based on R309-215-7(5) Table 215-1
Based on the CT calculation by Merrial Johansen of Johansen & Tuttle Engineering, Inc. during the plan review process.
Total Organic Carbon (TOC) Removal Requirement — The required TOC removal percentage for the East Carbon Water Treatment Plant (TP003)plant is 15%, which is determined based on raw water
TOC and alkalinity levels shown in the table below:
Raw Water TOC
(mg/L)
Raw Water Alkalinity
(mg/L as CaCO3)
0 to 60
>60 to 120
>120
>2.0 to 4.0
35%
25%
15%
>4.0 to 8.0
45%
35%
25%
>8.0
50%
40%
30%
Disinfection
The System is required to continuously disinfect the treated water from this WTP.
The disinfection treatment shall be sufficient to ensure the total treatment processes of this WTP achieve at least 3-log inactivation/removal of Giardia lamblia, 4-log inactivation/removal
virus, and a minimum of 2.0-log Cryptosporidium removal (for treating Bin 1 source water). [R309-200-5(7)(a)(i); R309-215-15(12)].
The calculated disinfection CT for all processes shall be reported monthly to indicate the level of disinfection effectiveness. [R309-215-15(19)]
Disinfection at Point of Entry (POE)[R309-200-5(7), R309-215-15(19)]
The System is required to continuously disinfect the treated water from this WTP. [R309-200-5(7)]
The chlorine residual must not be below 0.2 milligram per liter (mg/L) free chlorine residual at the point of entry (POE), where the treated water enters the distribution system, for
more than four hours. [R309-200-5(7)(a)(ii)]
The chlorine residual must not exceed the maximum residual disinfectant level (MRDL) of 4.0 mg/L free chlorine residual. [R309-200-5(3)(c)(iv) Table 200-5]
Lowest Daily POE chlorine residual readings shall be collected and recorded on the monthly report.
Systems serving a population between 1,000 and 2,500 shall either continuously monitor chlorine residuals at the POE or collect 3 grab samples per day
The chlorine analyzer should be verified for accuracy or calibratedat least quarterlyper Standard Method 334.0 Determination of Residual Chlorine in Drinking Water Using an Online Chlorine
Analyzer. [EPA 815-B-09-013 September 2009 11.1.1.2 Page 13]
A Hach Pocket Colorimeter DPD colorimetric method (e.g. Method 8021) is an acceptable method for verifying on-line chlorine residual analyzers (e.g. for Hach Cl17 online analyzer). If
the verification fails, online analyzer adjustments will be made until the accuracy is achieved. A calibration will be conducted if verification testing cannot be accomplished successfully.
Disinfection in the Distribution system (DS001)[R309-105-10(1)(c), R309-215(10)(3)]
This water system must take a minimum of three (3) chlorine residual samples per week at varying locations throughout its distribution system (DS001). [R309-105-10(1)(c)]
Distribution system chlorine residuals must be taken in conjunction with total coliform sampling. [R309-215-10(3)]
A summary of the chlorine residuals taken from the DS must be submitted quarterly, by no later than the 10th day after the end of each quarter (i.e. January 10th, April 10th, July 10th,
and October 10th). The residuals should be reported via the Division’s online form found at MRDL.utah.gov.
Turbidity Limit Issues
Conventional Filtration and Direct Filtration
The combined filter effluent (CFE) turbidity shall be less than or equal to 0.3 NTU in at least 95% of the measurements taken each month. The CFE turbidity shall at no time exceed 1.0
NTU. [R309-200-5(5)(a)(i); R309-215-9(1)]
Turbidity Monitoring and Reporting — General

The turbidity readings during the operation and maintenance procedures, such as plant start-up, clean-in-place, enhanced flux maintenance, air scrub, integrity tests, etc., can be excluded
from the report. Operational logs and/or SCADA shall reflect the conditions causing false turbidity readings.
If a data recording delay is programmed into SCADA after plant start-up, the delay shall not exceed 15 minutes, and the System shall inform the Division of the programming details
Signal averaging is not allowed.
The turbidity of the combined filter effluent (CFE) and each individual filter effluent (IFE) shall be continuously monitored. [See R309-215-9(1)(a) for CFE monitoring, and R309-525-15(4)(b)(vi)
and (4)(c)(vii) for IFE monitoring.]
The turbidity of the combined filter effluent (CFE) and each individual filter effluent (IFE) shall be continuously recorded. [R309-215-9(1)(b)]
The System shall monitor the turbidity results of each IFE at a frequency of no greater than every 15 minutes. [R309-215-9(1)(b)]
The highest CFE turbidity reading at the end of eachfour-hour (or shorter) interval of operation must be included in the monthly surface water treatment plant report submitted to the
Division, excluding data described in #5a. [R309-215-9(1)(b)] Data must be sufficient to determine the information outlined below. [R309-215-9(1)(b); R309-215-9(1)(c), R309-215-9(4)(a)
and R309-215-9(5)(a)]
Total number of the 4-hour combined filter effluent (CFE) turbidity measurements reported during the month (see #5e)
The number and percentage of 4-hour combined filter effluent (CFE) turbidity measurements reported during the month, which are less than or equal to 0.3 NTU, excluding data described
in #5a.
The date and value of any turbidity measurement taken during the month, that exceed 1.0NTU for a System using conventional or direct filtration.
If there is a failure in continuous monitoring equipment, the water system shall conduct grab sampling for turbidity every four hours. [R309-215-9(1)(b)]
The grab sampling, in lieu of continuous monitoring, cannot be more than five working days for water systems serving a population of 10,000 or more, following the failure of equipment.
The grab sampling, in lieu of continuous monitoring, cannot be more than fourteen days for water systems serving a population less than 10,000, following the failure of equipment.
If the set turbidity limit for the approved treatment technology is exceeded, the System must comply with the re-sampling and notification requirements. [R309-215-9(2)]
Re-sample as soon as practicable and preferably within one hour.
If re-sampling confirms the exceedance of the turbidity limit —
The System shall collect at least one bacteriological sample near the first service connection from the source within 24 hours of the turbidity exceedance. This sample result shall be
included in determining bacteriological compliance for that month.
The System shall report this turbidity re-sampling exceedance to the Director as soon as practical, but no later than 24 hours after the turbidity exceedance is known. This reporting
is in addition to reporting the incident on any monthly WTP reports.
The System using conventional filtration or direct filtration shall inform the Division as soon as possible, but no later than the end of the next business day if any time the combined
filter effluent (CFE) turbidity exceeds 1.0 NTU. [R309-215-9(6)(a)]
Turbidity Equipment Verification and Calibration
Continuous turbidity monitoring equipment for the combined filter effluent (CFE) and each individual filter effluent (IFE) shall be checked for accuracy and/or re-calibrated at a minimum
frequency of monthly. [R309-215-9(1)(d)]
The turbidimeter shall be calibrated andthe accuracy verified at least once per month.
The turbidimeters should be thoroughly cleaned and calibrated with primary standardsat least quarterly.
It is not allowed to calibrate on-line instruments by comparison with a bench-top turbidimeter.
The most recent verification/calibration date for the CFE turbidimeter and each IFE turbidimeter shall be reported on the monthly report.
Additional Reporting and Recordkeeping Requirements for Water Systems Serving a Population of Less Than 10,000 [R309-215-9(5)]
The System shall maintain the results of individual filter monitoring for at least three years. The System shall record the results of individual filter monitoring every 15 minutes.
The System shall report that they have conducted individual filter effluent (IFE) turbidity monitoring. The System shall report individual filter turbidity measurement results only if
one or more of the following conditions exists. The System shall report IFE turbidity measurement results only if one of the following conditions exists. [R309-215-9(5)(b)]
For any IFE (or CFE for water systems with two filters that monitor CFE in lieu of IFE) that has a measured turbidity level greater than 1.0 NTU in two consecutive recordings taken 15
minutes apart, the water system shall include in the monthly report:
Filter number(s)
The corresponding date(s)
The turbidity values exceeding 1.0 NTU
The cause of the exceedance (if known) [R309-215-9(5)(b)(i)]
If a water system is required to report for three months in a row for IFE (or CFE for water systems with two filters that monitor CFE in lieu of IFE) turbidity exceeding 1.0 NTU in two
consecutive recordings taken 15 minutes apart, the water system shall conduct a self-assessment of the filter within 14 days of the day the filter exceeded 1.0 NTU in two consecutive
measurements for the third straight month unless a comprehensive performance evaluation (CPE) is required. Water systems with two filters that monitor CFE in lieu of IFE must conduct
a self-assessment on both filters. [R309-215-9(5)(b)(ii)]
For any IFE (or CFE for water systems with two filters that monitor CFE in lieu of IFE) that has a measured turbidity level greater than 2.0 NTU in two consecutive recordings taken 15
minutes apart for two months in a row:
The System shall arrange to have a comprehensive performance evaluation (CPE) conducted by the Division or a third party approved by the Director no later than 60 days following the
day of the 2.0 NTU exceedance in two consecutive measurements for the second straight month.
The System must report the CPE required and the date it was triggered.
The CPE must be completed and submitted to the Division no later than 120 days following the exceedance.
If a CPE has been completed within 12 prior months or the water system and the Division jointly participate in an ongoing Comprehensive Technical Assistance (CTA) project, a new CPE
is not required. [R309-215-9(5)(b)(iii)]
Source Water Bin Classification
The Grassy Trail Intake (WS002) of the East Carbon Water Treatment Plant (TP003) is classified as in Bin 1 based on the second round of sampling completed in September 2018 [R309-215-15(11)].
ADDENDUM 4
Summary of Source Monitoring Requirements

East Carbon City Water System (UTAH#04012)
East Carbon Water Treatment Plant (TP003)
Issuance of this Operating Permit changes your water system’s source monitoring and reporting requirements. The source chemical monitoring requirements for this treatment plant are given
below. Please label all finished samples collected from the East Carbon WTP as WS003 the facility ID on laboratory paperwork. An updated monitoring schedule can be viewed any time atwaterlink.utah.gov
under the Water Monitoring section. If you have questions concerning this system source sampling requirements, please contact David Kruse at 385-566-7789 ([e-mail]).
Facility with new requirements
Analyte(s) Required
# Of samples
Sampling Frequency
Next Due Date
Rule Reference
TP003 East Carbon WTP
Nitrate
1
Yearly
01/01/2025-12/31/2025
R309-205-5
Volatile Organics
1
Every Three Years
01/01/2026-12/31/2028
R309-205-6(2)
Radionuclides
1
Every Six Years
01/01/2026-12/31/2031
R309-205-7(1)(b)
Pesticides
1
Every Three Years
01/01/2026-12/31/2028
R309-205-6(1)
Sulfate, Sodium, TDS
1
Every Nine Years
01/01/2029-12/31/2037
R309-205-5
Inorganics and Metals
1
Every Nine Years
01/01/2029-12/31/2037
R309-205-5