NC0021849_Application (ATC)_20240201 (13)

State of North Carolina
DWR
Department of Environmental Quality
Division of Water Resources
Division of Water Resources
APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT
FORM ATC 10-23
K. Residuals Management Plan
❑ For all new facilities, expanding facilities, or modifications that result in a change to sludge production and/or sludge
processes, provide a Residuals Management Plan meeting the requirements of 15A NCAC 02T .0504(il and .0508; the Plan
must include:
❑ A detailed explanation as to how the generated residuals (including trash, sediment and grit) will be collected, handled,
processed, stored, treated, and disposed.
❑ An evaluation of the treatment facility's residuals storage requirements based upon the maximum anticipated residuals
production rate and ability to remove residuals.
❑ A permit for residuals utilization or a written commitment to the Applicant from a Permittee of a Department approved
residuals disposal/utilization program that has adequate permitted capacity to accept the residuals or has submitted a
residuals/utilization program application.
❑ If oil, grease, grit or screenings removal and collection is a designated unit process, a detailed explanation as to how the
oil/grease will be collected, handled, processed, stored and disposed.
® Not Applicable.
SECTION 4: PROJECT INFORMATION
A. WASTEWATER TREATMENT PLANT FLOW INFORMATION — COMPLETE FOR NEW OR
EXPANDING FACILITIES
1. Provide the following flow information:
Plant Flows
Existing Plant Design
1.0 MGD
Current NPDES Permit Limit
0.7 MGD
Current Annual Average
(past 12 months)
0.41 MGD
For Past 12 Months:
Start Date: December/2022
End Date: November/2023
For Past 24 Months:
Start Date: month/yr
End Date: November/2023
Maximum Month
0.64 MGD
0.51 MGD
Maximum Day
0.86 MGD
0.85 MGD
Peak Hour
2.2 MGD
2.2 MGD
APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT (FORM ATC 10-23) Page 5

DWR
Division of Water Resources
State of North Carolina
Department of Environmental Quality
Division of Water Resources
APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT
FORM ATC 10-23
B. WASTEWATER TREATMENT FACILITY DESIGN INFORMATION — COMPLETE FOR NEW OR
EXPANDING FACILITIES AND FOR TREATMENT PROCESS MODIFICATIONS
1. Have all of the requirements of 15 NCAC 02H. 0100, 15A NCAC 02T, North Carolina General Statute 133-3, North
Carolina General Statute 143-215.1, and Division of Water Resources Minimum Design Criteria for NPDES Wastewater
Treatment Facilities been met by the proposed design and specifications? ® Yes or ❑ No. If no, provide justification as to
why the requirements are not met, consistent with 15A NCAC 02T .0105(n):
2. Provide the design influent and effluent characteristics that are used as the basis for the project design, and the NPDES
permit limits for the following parameters:
Project Basis of Design
Influent
Design Influent
Design Influent
Concentration
Concentration
Load
- Current
(Must be
(Must be
Annual
supported by
supported by
Design Effluent
Average (past
Engineering
Engineering
Concentration and/or
NPDES Permit Limits
12 months) if
Calculations
Calculations
(monthly average)
Parameter
Available
[Section 3.H
Section 3.111)Load
Ammonia Nitrogen
Not Measured
Not Measured
Not Measured
4.0 mg/L Summer
4.0 mg/L Summer
8.0 mg/L Winter
8.0 mg/L Winter
(NH3-N)
mg/L
mg/L
lb/day
Biochemical
15.0 mg/L Summer
15.0 mg/L Summer
Oxygen Demand
96 mg/L
110 mg/L
643 lb/day
(BOD5)
30.0 mg/L Winter
30.0 mg/L Winter
Fecal Coliform
351100 per 100 mL
35/100 per 100 mL
Nitrate + Nitrite
Nitrogen (NO3-N +
Not Measured mg/L
Not Measured mg/L
NO2-N
Total Kjeldahl
Not Measured
Nitrogen
mg/L
Not Applicable,
Monitored, No Limit
Monitored No Limit
mg/L
Total Nitrogen
mg/L
Not Applicable,
Monitored, No Limit
Monitored No Limit
lb/year
lb/year
Not Applicable,
Monitored, No Limit
Monitored Not
mg/L,
Total Phosphorus
Not Measured
Not Measured
Not Measured
Reported mg/L
Not Applicable,
Monitored, No Limit
mg/L
mg/L
lb/day
Monitored No Limit
lb/year
lb/year
Total Suspended
Solids (TSS)
99 mg/L
120 mg/L
701 lb/day
30.0 mg/L
30.0 mg/L
3. Based on the "Project Basis of Design" parameters listed above, will the proposed design allow the treatment facility to meet
the NPDES Permit Limits listed above? ® Yes or ❑ No. If no, describe how and why the Permit Limits will not be met: _
APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT (FORM ATC 10-23) Page 6

DWR
Division of Water Resources
4
State of North Carolina
Department of Environmental Quality
Division of Water Resources
APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT
FORM ATC 10-23
Per 15A NCAC 02T .0505(i), by-pass and overflow lines are prohibited. Is this condition met by the design? ® Yes or ❑
No If no, describe the treatment units bypassed, why this is necessary, and where the bypass discharges:
Per 15A NCAC 02T .0505(k), multiple pumps shall be provided wherever pumps are used. Is this condition met by the
design? ® Yes or ❑ No. If no, provide an explanation:
6. Per 15A NCAC 02T .0505(1), power reliability shall be provided consisting of automatically activated standby power supply
onsite capable of powering all essential treatment units under design conditions, or dual power supply shall be provided per
15A NCAC 02H. 0124(2)(a). Is this condition met by the design? ® Yes or ❑ No. If no, provide (as an attachment to
this Application) written approval from the Director that the facility:
➢ Has a private water supply that automatically shuts off during power failures and does not contain elevated water storage
tanks, and
➢ Has sufficient storage capacity that no potential for overflow exists, and
➢ Can tolerate septic wastewater due to prolonged detention.
7. Per 15A NCAC 02T .0505(o), a minimum of 30 days of residual storage shall be provided. Is this condition met by the
design? ® Yes or ❑ No. If no, explain the alternative design criteria proposed for this project in accordance 15A NCAC
02T .105(n):
8. Per 15A NCAC 02T .0505(g), the public shall be prohibited from access to the wastewater treatment facilities. Explain how
the design complies with this requirement: The WWTP has a fence around the facilty and a gate at the front of the facilty
to restrict access.
9. Is the treatment facility located within the 100-year flood plain? ❑ Yes or ® No. If yes, describe how the facility is
protected from the 100-year flood:
C. WASTEWATER TREATMENT UNIT AND MECHANICAL EQUIPMENT INFORMATION — COMPLETE
FOR NEW OR EXPANDING FACILITIES AND FOR MODIFIED TREATMENT UNITS
1. PRELIMINARY AND PRIMARY TREATMENT (i.e., physical removal operations and flow equalization):
No. of
Plan Sheet
Specification
Calculations
Treatment Unit
Units
Type
Size per Unit
Reference
Reference
Provided?
(Yes or No)
Manual Bar Screen
2
Bar Rack
2.2 MGD at peak hourly flow
M1.01
05 50 00
Mechanical Bar
2
Step
2.2 MGD at peak hourly flow
M1.01
46 21 26
Screen
Grit Removal
1
Vortex
2.2 MGD at peak hourly flow
M1.01 &
46 23 23
M 1.02
Flow Equalization
--
gallons
Primary Clarifier
Circular
ft diameter; ft side
water depth
Primary Clarifier
Rectangular
square feet; ft side
water depth
Other
APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT (FORM ATC 10-23) Page 7