DWQ-2024-004376

UPDES General Permit for Construction Dewatering and Hydrostatic Testing (CDHT)
Dewatering Control Plan (DCP) Template Instructions:
DWQ has developed this template for dewatering and hydrostatic testing sites permitted under the General Permit for Construction Dewatering and Hydrostatic Testing (CDHT) UTG07000. The
template gives you a framework to ensure that your DCP addresses the necessary elements required by the permit.
This template covers most of the DCP elements that the Utah CDHT requires, however, you are encouraged to customize this template to reflect unique conditions at the site or address
a requirement not covered in the provided sections. The CDHT Permit requires that a DCP be developed prior to dewatering and updated to accurately reflect the site. Changes to the project
such as owner/operator, point of contact, BMPs, discharge locations and sampling should be updated in the DCP. The Permit requires a DCP be available on-site when dewatering for the
project has begun.
Dewatering Control Plan
for:
Insert Project Name
Insert Project Site Location/Address
Insert City, State, Zip Code
Insert Project Site Telephone Number (if applicable)
Operator:
Insert Company or Organization Name
Insert Name
Insert Address
Insert City, State, Zip Code
Insert Telephone Number
Insert Fax/Email
Primary DCP Contact:
Insert Company or Organization Name
Insert Name
Insert Address
Insert City, State, Zip Code
Insert Telephone Number
Insert Fax/Email
DCP Preparation Date:
__/__/__
UPDES Permit Tracking Number*:
UTG-________
*This is the unique number assigned to your project after you have applied for coverage under the Utah Pollutant Discharge Elimination System (UPDES) construction dewatering and hydrostatic
testing permit. If this template is filled out first, you can leave the tracking number blank until after you have applied for coverage.
Section 1: Contact Information/Responsible Parties
Instructions: Identify Responsibilities
Responsibilities
Name/Position
Obtain and Maintain CDHT Coverage
Insert name and contact information
DCP Creation and Maintenance
Insert name and contact information
Daily Visual Inspections
Insert name and contact information
Weekly Sampling
Insert name and contact information
Section 2: Nature of Construction Activities
2.1 Construction Activities
Is there a Construction General Permit or Common Plan Permit associated with this project?
If so, insert permit number here _____________
Check box if section not applicable to this site
Section 3: Nature of Dewatering Activities
3.1 Dewatering Activity
Instructions: Please check which dewatering activity is applicable to your site. Note: Any dewatering discharge that is land applied and does not reach state waters or the storm drain
is not regulated under the CDHT permit however a groundwater permit may be required.
In-stream dewatering: cofferdams, drill hole or pylon development
Surface area dewatering: water pumped from disturbed surface areas (trenches, sumps, excavation pits, or other excavations associated with construction where sediment-laden ground water
or surface water/storm inflow must be removed)
Ground water dewatering: water discharged from well development, well pump tests, or pumping of ground water from a construction area. Dewatering wells located within an active area

of disturbance is subject to the Construction Dewatering/Hydrostatic Testing General Permit. Common methods of ground water dewatering from a construction area include sumps, wells,
and well-points.
Hydrostatic Testing: such as piping systems, gas cylinders, fire extinguishing, storage tanks, boilers, chemical pipelines, and pressure vessels that are tested for strength and leaks.
Other: activity was approved by DWQ. Description:
3.2 Dewatering Discharge Locations
Instructions: Identify the locations of each dewatering discharge (CDHT III.F.2). If discharging at multiple locations, identify the timeframe of discharging activities for each discharge
location. If discharging at multiple locations, identify a short hand name for the discharge locations (i.e., 1,2,3 etc.). Please identify the duration of dewatering in days or weeks,
and identify the estimated maximum flow volumes for each discharge (CDHT I.C.3.). Please identify the units of your calculations. Use additional rows if needed.
Name of Discharge Locations
GPS of Discharge Location
Timeframe of Dewatering
Estimated Maximum flow
Instructions: Identify the receiving water for each dewatering discharge location (CDHT I.C.3). Identify if the receiving waterbody has any impairments. If so, identify each impairment
in the table below. Use additional rows if needed. Please use this map for a list of waterbodies and their impairments: https://enviro.deq.uta.gov/
Name of Discharge Location
Receiving Water
Receiving Water Impaired? (y/n)
If impaired, identify impairment(s)
Section 4: Dewatering Best Management Practices (BMPs)
4.1 BMPs to prevent high Total Suspended Solids (TSS)
Instructions: Please list any BMPs utilized for preventing high TSS in the dewatering discharge. Each BMP should have flow specifications (maximum flow volume that the BMP is specified
for) to ensure that BMPs are chosen appropriately for the anticipated flow volume (CDHT Sections II.C.6.). BMPs listed in the table below should identify controls for minimizing TSS.
Ensure the BMPs are sufficient to handle the initial purge, or identify alternative BMPs for the initial purge discharge in the below table.
Name of Discharge Location
BMPs Utilized
Maximum Flow Capacity of BMP
(if applicable)
4.2 BMPs to Minimize Erosion
Instructions: Please list any BMPs associated with minimizing erosion,scouring, or damage to stream banks, streambeds, or ditches (CDHT Sections II.C.7. & II.C.8.).
Check box if section not applicable to this site.
Please explain:________________________________________________________________________
Name of Discharge Location
BMPs Utilized
Maximum Flow Capacity of BMP
(if applicable)
4.3 BMPs for Pollution Prevention
Instructions: Please list each BMP associated with protecting both the source and point of discharge from unlawful contaminants that are not authorized by the permit prior to discharge
into waters of the state (CDHT I.B.). Factors to consider in this list include: Spilled or leaking fuels entering into the watercourse, Excess sediment entering or being transported
down the watercourse, etc.This section may not be applicable if your dewatering discharge is pumped directly into a storm drain or won’t interact with outside contaminants along the
watercourse prior to connecting with the water of the state.
Check box if this section doesn’t apply to your site, delete the table below, and explain why it doesn’t apply.
Please explain: _________________________________________________________________
Name of Discharge Locations
BMPs Utilized
Maximum Flow Capacity of BMP
(if applicable)
Section 5: Inspections and Sampling
5.1 Daily Log Inspections
Please see Appendix A for a Template for Daily Log observations (CDHT Section III.G.) and Discharge Log observations (CDHT Section III.F.) combined.
5.2 Discharge Log & Discharge Map
Please see Appendix A for a Template for Daily Log observations (CDHT Section III.G.) and Discharge Log observations (CDHT Section III.F.) combined.
Please attach a map showing the discharge locations (CDHT III.F.2)). This should be a general map of the site with each discharge point identified.
Attach map here
5.3 Sampling
Please take weekly samples from each discharge point. Samples should be taken at the furthest downstream BMP of each discharge point (i.e., if you have a filter bag over your discharge
hose, take a sample of the water after it has filtered through the bag). Sample results should be submitted for each discharge location to DWQ monthly no later than the 28th day of the
month. If no discharge occurs, “No Discharge” should be reported.
Sampling Requirements:pH must be analyzed within 15 minutes(CDHT II.C.1.h.). Oil and grease must be sampled if a visible sheen is observed(CDHT II.C.1.c.). Chlorine is only required
for Hydrostatic Testing cases that chlorinated water is used and discharged to a stream with a chlorine standard(CDHT II.C1.f.).
5.4 Noncompliance Procedures

Corrective Action
Upon any visual observation of Best Management Practices (BMPs) failure, inadequate BMPs, elevated turbidity, or anoil sheen, the following steps must be conducted:
Take a grab sample for analysis anytime there is an observation of elevated turbidity and/or oil and grease.
Cease discharge of dewatering effluent until the issue is resolved.
Conduct a site-wide inspection to observe operating conditions and BMP maintenance.
Address any BMP failures by determining whether there was a failure in design, installation, or maintenance andperform the appropriate measures to fix the failure, including determining
whether BMPs should be modified or ifadditional measures must be taken.
Document the issue and resolutions in the daily log and update the Dewatering Plan.
Notify the Division of Water Quality
To report incidents “Initial Non-Compliance Notification” form is available at:https://deq.utah.gov/water-quality/general-construction-storm-water-updes-permits
Include a report with the next DMR submittal.
Twenty-Four Hour Notice of Noncompliance reporting.
The permittee is required to orally report to DWQ within 24-hours the permittee becomes aware of the circumstance is required when (CDHT III.L):
a noncompliance may endanger health or the environment
Any unanticipated bypass which exceeds any effluent limitation in the permit (See Part IV.G. Bypass of Treatment Facilities); or
Any upset which exceeds any effluent limitation in the permit;
Violations of maximum daily discharge limitation for any of the pollutants listed in the permit.
The report shall be made to DWQ, 801-536-4300 or the 24-hour answering service 801-536-4123
Written Noncompliance Reports
Permittee shall provide a written submission within five days of the time that the permittee becomes aware of the circumstances. A template for Written Noncompliance Reports can be found
at: https://deq.utah.gov/water-quality/general-construction-storm-water-updes-permits
Appendix A
Please utilize this template for the daily observations required for the CDHT permit. Please complete a form for each discharge location.
Note: Sample visual or grab indicates whether weekly sampling was conducted on this day (grab sample) or whether visual observations were documented. Grab samples require that all columns
completed. Visual samples require every column except columns for flow and flow units are completed. If problems observed column is checked yes, please initiate non-compliance procedures
found in Section 5.4.
Discharge Log & Daily Observations
Name of Discharge Location:
Date
Start Time
End Time
Sample:
Visual/Grab
Flow
Flow Units
Oil/Grease Sheen? (y/n)
Inspection Observation? i.e., odor, color, sheen, erosion at discharge location, etc.
Problems Observed? (y/n)
Initials