WQ0000185_Modification_20210816

Initial Review
Reviewer Thornburg, Nathaniel D
Is this submittal an application? (Excluding additional information.)*
r Yes r No
Permit Number (IR)* WQ0000185
Applicant/Permittee Ocean Sands Water and Sewer District
Applicant/Permittee Address 153 Courthouse Rd, Suite 302, Currituck, NC 27929
Is the owner in BIMS? r Yes r No Is the facility in BIMS? r Yes r No
Owner Type County
Facility Name Ocean Sands WWTP
County Currituck
Fee Category Major Fee Amount $0
Is this a complete
application?*
r Yes r No Complete App Date 08/16/2021
Signature Authority
Signature Authority Title
Signature Authority Email
Document Type (if non -application)
Email Notifications
Does this need review bythe hydrogeologist?* r Yes r No
Regional Office
CO Reviewer
Admin Reviewer
Below list any additional email address that need notification about a new project.
Email Address
Comments to be added to email notfication
Comments for Admin
Comments for RO

Comments for Reviewer
Comments for Applicant

Submittal Form
Project Contact Information
Rease provide information on the person to be contacted by N B Staff regarding electibnittal, confirmation of receipt, other
.......................................................... electronic surece, aner correspondence.
_ -
Name * Eric Weatherly
Email Address*
Eric. Weatherly@CurrituckCountyNC.
gov
Project Information
Application/Document Type * r New (Fee Required)
r Modification - Major (Fee Required)
r Renewal with Major Modification (Fee
Required)
r Annual Report
r Additional Information
r Other
Phone Number*
252-232-6035
r Modification - Minor
C Renewal
C GW-59, NDMR, NDMLR, NDAR-1,
NDAR-2
C Residual Annual Report
C Change of Ownership
We no longer accept these monitoring reports through this portal. Please click on the link below and it will take you to the correct form.
https://edocs.deq.nc.gov/Forms/NonDischarge_Monitoring_Report
Permit Type:* (- Wastewater Irrigation r High -Rate Infiltration
r Other Wastewater r Reclaimed Water
r Closed -Loop Recycle r Residuals
r Single -Family Residence Wastewater r Other
Irrigation
Permit Number:* WQ0000185
Fbs Current Existing permt nurrber
Applicant/Permittee * Ocean Sands Water and Sewer District
Applicant/Permittee Address* 153 Courthouse Rd, Suite 302, Currituck, NC 27929
Facility Name * Ocean Sands WWTP
Please provide comments/notes on your current submittal below.
Minor Modification permit application for the odor control system for sludge holding tanks that
is part of the Ocean Sands WWTP 400,000 gpd Phase 2 and 3. Uploaded is the complete
application packed, which includes:
1) Cover Letter;
2) signed and sealed permit application;
3) Property Ownership Documentation;
4) signed and sealed Engineering Plans;
5) signed and sealed Specifications;
6) signed and sealed Engineering Calculation;
7) Operation and Maintenance Plan; and
8) Ebsting Permit.
Also uploaded are the Engineering Plans for better clarity of details.
At this time, paper copies are no longer required. If you have any questions about what is required, please contact Nathaniel Thornburg
at [e-mail].
Please attach all information required or requested for this submittal to be reviewed here.*
(Application Fora} Engineering Rans, Specifications, Calculations, Etc.)
SIGNED_ Application - Minor Modification
11.32MB
(WQ0000185).pdf
Engineering Plans Odor Control - Phase 2_3.pdf 9.31 MB
Upload only 1 FLFdocurrent (less than 250 NB). Miltiple documents mist be confined into one RJFfile unless file is larger than
upload limit.

* V By checking this box, I acknowledge that I understand the application will not be
accepted for pre -review until the fee (if required) has been received by the Non -
Discharge Branch. Application fees must be submitted by check or money order
and made payable to the North Carolina Department of Environmental Quality
(NCDEQ). I also confirm that the uploaded document is a single PDF with all parts
of the application in correct order (as specified by the application).
Mail payment to:
NCDEQ — Division of Water Resources
Attn: Non -Discharge Branch
1617 Mail Service Center
Raleigh, NC 27699-1617
Signature
Submission Date 8/16/2021

State of North Carolina
Department of Environmental Quality
Division of Water Resources
15A NCAC 02T .0700 – HIGH-RATE INFILTRATION SYSTEMS
INSTRUCTIONS FOR FORM: HRIS 06-16 & SUPPORTING DOCUMENTATION

Plans, specifications and supporting documents shall be prepared in accordance with 15A NCAC 02H .0400(if necessary), 15A
NCAC 02L .0100, 15A NCAC 02T .0100, 15A NCAC 02T .0700, Division Policiesand good engineering practices. Failure to
submit all required items will necessitate additional processing and review time.
For more information, visit the Water Quality Permitting Section’s Non-Discharge Permitting Unit website
General – When submitting an application to the Water Quality Permitting Section’s Non-Discharge Permitting Unit, please use the
following instructions as a checklist in order to ensure all required items are submitted. Adherence to these instructions and checking
the provided boxes will help produce a quicker review time and reduce the amount of requested additional information.
Unless otherwise noted, the Applicant shall submit one original and two copies of the application and supporting documentation.
A. Cover Letter (All Application Packages):
List all items included in the application package, as well as a brief description of the requested permitting action.
B.Application Fee(All New and Major Modification Application Packages):
Submit a check, money order or electronic funds transfer made payable to: North Carolina Department of Environmental
Quality (NCDEQ). The appropriate fee amount for new and major modification applications may be found at: Standard Review
Project Fees.
C. High-Rate Infiltration Systems (FORM: HRIS 06-16) Application (All Application Packages):
Submit the completed and appropriately executed High-Rate Infiltration Systems (FORM: HRIS 06-16) application. Any
unauthorized content changes to this form shall result in the application package being returned. If necessary for clarity or due
to space restrictions, attachments to the application may be made, as long as the attachments are numbered to correspond to the
section and item to which they refer.
If the Applicant Type in Item I.2. is a corporation or company, provide documentation it is registered for business with the
North Carolina Secretary of State.
If the Applicant Type in Item I.2. is a partnership or d/b/a, enclose a copy of the certificate filed with the Register of Deeds in
the county of business.
The facility name in Item II.1. shall be consistent with the facility name on the plans, specifications, agreements, etc.
The Professional Engineer’s Certification on Page 13 of the application shall be signed, sealed and dated by a North Carolina
licensed Professional Engineer.
The Applicant’s Certification on Page 13 of the application shall be signed in accordance with 15A NCAC 02T .0106(b). Per
15A NCAC 02T .0106(c), an alternate person may be designated as the signing official if a delegation letter is provided from
a person who meets the criteria in 15A NCAC 02T .0106(b).
If this project is for a renewal without modification, use the Non-Discharge System Renewal (FORM: NDSR)application.
D.Property Ownership Documentation (All Application Packages):
Per 15A NCAC 02T .0704(f), the Applicant shall demonstrate they are the owner of all property containing the wastewater
treatment and high-rate infiltration facilities:
Legal documentation of ownership (i.e., GIS, deed or article of incorporation), or
Written notarized intent to purchase agreement signed by both parties with a plat or survey map, or
Written notarized lease agreement that specifically indicates the intended use of the property and has been signed by both
15A NCAC 02L .0107.
parties, as well as a plat or survey map. Lease agreements shall adhere to the requirements of
Provide all agreements, easements, setback waivers, etc. that have a direct impact on the wastewater treatment, conveyance,
storage and high-rate infiltration facilities.
INSTRUCTIONS FOR FORM: HRIS 06-16 & SUPPORTING DOCUMENTATION Page 1 of 6

E. Soil Evaluation (All Application Packages that include new high-rate infiltration sites):
Per 15A NCAC02T .0704(b)and the Soil Scientist Evaluation Policy, submit a detailed soil evaluation that has been signed,
sealed and dated by a North Carolina Licensed Soil Scientist and includes at a minimum:
The report shall identify all the basins/fields with project name, location, and include a statement that the basins/fields
were recommended for the proposed land application activity.
Field delineated detailed soils map meeting all of the requirements of the Soil Scientist Evaluation Policy.
Soil profile descriptions meeting all of the requirements of the Soil Scientist Evaluation Policy.
Provide all soil boring logs performed at the site.
For non-basins, a standard soil fertility analysis conducted no more than one year prior to permit application for each map
unit in the soil map legend for the following parameters:
Acidity Exchangeable sodium percentage (by calculation) Phosphorus
Base saturation (by calculation)Magnesium Potassium
Calcium ManganeseSodium
Cation exchange capacityPercent humic matterZinc
Copper pH
Saturated hydraulic conductivity (K) data that shall include at a minimum:
SAT
A minimum of three K tests shall be conducted in the most restrictive horizon for each soil series in the soil map.
SAT
All K tests shall be conducted in areas representative of the site.
SAT
All K tests shall be run until steady-state equilibrium has been achieved.
SAT
All collected K data shall be submitted, including copies of field worksheets showing all collected readings.
SAT
Submit a soil profile description for each Kdata point that shall extend at least one foot below the tested horizon.
SAT
Soil evaluation recommendations shall include at a minimum:
A brief summary of each map unit and its composition and identification of minor contrasting soils.
For non-basins, maximum precipitation rate (in/hr) for each soil/map unit within the proposed infiltration areas.
Seasonal infiltrationrestrictions, if appropriate.
Identification of areas not suitable for high-rate infiltration.
Recommended geometric mean K rate to be used in the water balance for each soil/map unit based upon in-situ
SAT
measurement of the saturated hydraulic conductivity from the most restrictive horizon.
Recommended drainage coefficient to be used in the water balance based upon comprehensive site evaluation, review
of collected onsite data, minor amounts of contrasting soils and the nature of the wastewater to be applied.
For non-basins, recommended annual hydraulic loading rate (in/yr) for each soil/map unit within the proposed
infiltration areas based upon in-situ K measurements form the most restrictive soil horizon.
SAT
2
For basins, recommended hydraulic loading rate (GPD/ft) for each soil/map unit within the proposed infiltration areas
based upon in-situ K measurements form the most restrictive soil horizon.
SAT
NOTE – If the soil evaluation was performed more than one year prior to the submittal of this application package, a statement shall
be included indicating that the site has not changed since the original investigation.
F. Agronomist Evaluation (All Application Packages that include new infiltration sites with cover crops or new crops for existing
infiltration sites):
Per 15A NCAC 02T .0704(i), submit an agronomist evaluation that has been signed, sealed and dated by a qualified professional
and includes at a minimum:
Proposed nutrient uptake values for each cover crop based upon each field’s dominant soil series and percent slope.
Plant available nitrogen calculations for each cover crop using the designed effluent concentrations in Application Item
V.1. and proposed mineralization and volatilization rates.
Historical site consideration, soil binding and plant uptake of phosphorus.
Seasonal infiltrationrestrictions, if appropriate.
A clear and reproducible map showing all areas investigated and their relation to proposed fields and crops.
Maintenance and management plan for all specified crops.
INSTRUCTIONS FOR FORM: HRIS 06-16 & SUPPORTING DOCUMENTATION Page 2 of 6

G. Hydrogeologic Report (All Application Packages treating industrial waste or having a design flow over 25,000 GPD):
Per 15A NCAC 02T .0704(e), the Hydrogeologic Investigation and Reporting Policy, the Groundwater Modeling Policyand
the Performance and Analysis of Aquifer Slug Tests and Pumping Tests Policy, submit a detailed hydrogeologic description
that has been signed, sealed and dated by a qualified professional and includes at a minimum:
A hydrogeologic description to a depth of 20 feet below land surface or bedrock, whichever is less. A greater depth of
investigation is required if the respective depth is used in predictive calculations.
Representative borings within the infiltration areas and all proposed earthen impoundments.
A description of the regional and local geology and hydrogeology.
A description, based on field observations of the site, of the site topographic setting, streams, springs and other groundwater
discharge features, drainage features, existing and abandoned wells, rock outcrops, and other features that may affect the
movement of the contaminant plume and treated wastewater.
Changes in lithology underlying the site.
Depth to bedrock and occurrence of any rock outcrops.
The hydraulic conductivity and transmissivity of the affected aquifer(s).
Depth to the seasonal high water table (SHWT).
A discussion of the relationship between the affected aquifers of the site to local and regional geologic and hydrogeologic
features.
A discussion of the groundwater flow regime of the site prior to operation of the proposed facility and post operation of
the proposed facility focusing on the relationship of the system to groundwater receptors, groundwater discharge features,
and groundwater flow media.
If the SHWT is within six feet of the surface, a mounding analysis to predict the level of the SHWT after wastewater
application.
H. Water Balance (All Application Packages that include new or modified infiltration sites, changes in flow or changes in storage):
Per the Water Balance Calculation Policy, submit information clearly demonstrating that the effluent can be assimilated
regardless of precipitation events or temperature, and there are no crop or equipment maintenance issues that would necessitate
storage.
OR
Per 15A NCAC 02T .0704(k) and the Water Balance Calculation Policy, submit a water balance that has been signed, sealed
and dated by a qualified professional and includes at a minimum:
At least a two-year iteration of data computation that considers precipitation into and evaporation from all open atmosphere
storage impoundments, and uses a variable number of days per month.
th
Precipitation based on the 80 percentile and a minimum of 30 years of observed data.
Potential Evapotranspiration (PET) using the Thornthwaite method, or another approved methodology, using a minimum
of 30 years of observed temperature data.
Soil drainage based on the geometric mean of the in-situ K tests in the most restrictive horizon and a drainage coefficient
SAT
ranging from 4 to 10% (unless otherwise technically documented).
Other factors that may restrict the hydraulic loading rate when determining a water balance include:
Depth to the SHWT and groundwater lateral movement that may result in groundwater mounding.
Nutrient limitations and seasonal application times to ensure high-rate infiltration does not exceed agronomic rates.
Crop management activities resulting in cessation of infiltration for crop removal.
NOTE – High-Rate Infiltration Systems serving residential facilities shall have a minimum of 14 days of wet weather storage.
I. Engineering Plans (All Application Packages):
Per 15A NCAC 02T .0704(c)(1), submit standard size and 11 x 17-inch plan sets that have been signed, sealed and dated by a
North Carolina licensed Professional Engineer, and shall include at a minimum:
Table of contents with each sheet numbered.
A general location map with at least two geographic references and a vicinity map.
A process and instrumentation diagram showing all flow, recycle/return, aeration, chemical, electrical and wasting paths.
Plan and profile views of all treatment and storage units, including their piping, valves, and equipment (i.e., pumps,
blowers, mixers, diffusers, flow meters, etc.), as well as their dimensions and elevations.
Details of all piping, valves, pumps, blowers, mixers, diffusers, recording devices, fencing, auxiliary power, etc.
A hydraulic profile from the treatment plant headworks to the highest infiltration point.
The high-rate infiltration area with an overlay of the suitable infiltration areas depicted in the Soil Evaluation.
For non-basins, each nozzle/emitter and its wetted area influence and each infiltration zone labeled as it will be operated.
For non-basins, locations within the infiltration system of air releases, drains, control valves, highest infiltration
nozzle/emitter, etc.
For non-basin automated infiltration systems, provide the location and details of the precipitation/soil moisture sensor.
Plans shall represent a completed design and not be labeled with preliminary phrases (e.g., FOR REVIEW ONLY, NOT
FOR CONSTRUCTION, etc.) that indicate they are anything other than final specifications. However, the plans may be
labeled with the phrase: FINAL DESIGN - NOT RELEASED FOR CONSTRUCTION.
INSTRUCTIONS FOR FORM: HRIS 06-16 & SUPPORTING DOCUMENTATION Page 3 of 6

J. Specifications (All Application Packages):
Per 15A NCAC 02T .0704(c)(2), submit specifications that have been signed, sealed and dated by a North Carolina licensed
Professional Engineer, and shall include at a minimum:
Table of contents with each section/page numbered.
Detailed specifications for each treatment/storage/infiltration unit, as well as all piping, valves, equipment (i.e., pumps,
blowers, mixers, diffusers, flow meters, etc.), nozzles/emitters, precipitation/soil moisture sensor (if applicable),
audible/visual high water alarms, liner material, etc.
Site Work (i.e., earthwork, clearing, grubbing, excavation, trenching, backfilling, compacting, fencing, seeding, etc.)
Materials (i.e., concrete, masonry, steel, painting, method of construction, etc.)
Electrical (i.e., control panels, transfer switches, automatically activated standby power source, etc.)
Means for ensuring quality and integrity of the finished product, including leakage, pressure and liner testing.
Specifications shall represent a completed design and not be labeled with preliminary phrases (e.g., FOR REVIEW ONLY,
NOT FOR CONSTRUCTION, etc.) that indicate they are anything other than final specifications. However, the
specifications may be labeled with the phrase: FINAL DESIGN - NOT RELEASED FOR CONSTRUCTION.
K. Engineering Calculations (All Application Packages):
Per 15A NCAC 02T .0704(c)(3), submit engineering calculations that have been signed, sealed and dated by a North Carolina
licensed Professional Engineer, and shall include at a minimum:
Hydraulic and pollutant loading calculations for each treatment unit demonstrating how the designed effluent
concentrations in Application Item V.1. were determined.
Sizing criteria for each treatment unit and associated equipment (i.e., blowers, mixers, flow meters, pumps, etc.).
Total and effective storage calculations for each storage unit.
Friction/total dynamic head calculations and system curve analysis for each pump used.
Manufacturer’s information for all treatment units, pumps, blowers, mixers, diffusers, flow meters, etc.
Flotation calculations for all treatment and storage units constructed partially or entirely below grade.
For non-basins, a demonstration that the designed maximum precipitation and annual loading rates do not exceed the
recommended rates.
2
For basins, a demonstration that the designed loading rate (GPD/ft) does not exceed the recommended rate.
A demonstration that the specified auxiliary power source is capable of powering all essential treatment units.
L. Site Map (All Application Packages):
Per 15A NCAC 02T .0704(d), submit standard size and 11 x 17-inch site maps that have been signed, sealed and dated by a
North Carolina licensed Professional Engineer and/or Professional Land Surveyor, and shall include at a minimum:
A scaled map of the site with topographic contour intervals not exceeding 10 feet or 25 percent of total site relief and
showing all facility-related structures and fences within the wastewater treatment, storage and infiltration areas.
Soil mapping units shown on all infiltration sites.
The location of all wells (including usage and construction details if available), streams (ephemeral, intermittent, and
perennial), springs, lakes, ponds, and other surface drainage features within 500 feet of all wastewater treatment, storage
and infiltration sites.
Delineation of the compliance and review boundaries per 15A NCAC 02L .0107 and .0108.
Setbacks as required by 15A NCAC 02T .0706.
Site property boundaries within 500 feet of all wastewater treatment, storage and infiltration sites.
All habitable residences or places of public assembly within 500 feet of all treatment, storage and infiltration sites.
NOTE – For clarity, multiple site maps of the facility with cut sheet annotations may be submitted.
M. Power Reliability Plan (All Application Packages):
Per 15A NCAC 02T .0705(k), submit documentation of power reliability that shall consist of at a minimum:
An automatically activated standby power supply onsite that is capable of powering all essential treatment units under
design conditions, OR
Approval from the Director that the facility:
Serves a private water distribution system that has automatic shut-off during power failures and has no elevated water
storage tanks,
Has sufficient storage capacity that no potential for overflow exists, and
Can tolerate septic wastewater due to prolonged detention.
INSTRUCTIONS FOR FORM: HRIS 06-16 & SUPPORTING DOCUMENTATION Page 4 of 6

N. Operation and Maintenance Plan (All Application Packages):
Per 15A NCAC 02T .0707, submit an operation and maintenance (O&M) plan encompassing all wastewater treatment, storage
and infiltration systems that shall include at a minimum a description of:
Operation of the wastewater treatment, storage and infiltration systems in sufficient detail to show what operations are
necessary for the system to function and by whom the functions are to be conducted.
Anticipated maintenance of the wastewater treatment, storage and infiltration systems.
Safety measures, including restriction of access to the site and equipment.
Spill prevention provisions such as response to upsets and bypasses, including how to control, contain and remediate.
Contact information for plant personnel, emergency responders and regulatory agencies.
NOTE – A final O&M Plan shall be submitted with the partial and/or final Engineering Certification required under 15A NCAC
02T .0116, however, a preliminary O&M Plan shall be submitted with each application package.
O.Residuals Management Plan(All Application Packages with new, expanding or replacement wastewater treatment systems):
Per 15A NCAC 02T .0704(j) and .0708, submit a Residuals Management Plan that shall include at a minimum:
A detailed explanation of how 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 removal and collection are a designed unit process, submit an oil/grease disposal plan detailing how the
oil/grease will be collected, handled, processed, stored and disposed.
NOTE – Per 15A NCAC 02T .0705(n), a minimum of 30 days of residual storage shall be provided.
NOTE – Per 15A NCAC 02T .0704(j), a written commitment to the Applicant from a Permittee of a Department approved residuals
disposal/utilization program is not required at the time of this application, however, it shall be provided prior to operation of any
permitted facilities herein.
NOTE – If an on-site restaurant or other business with food preparation is contributing wastewater to this system, an oil/grease
disposal plan shall be submitted.
P. Additional Documentation:
Certificate of Public Convenience and Necessity (All Application Packages for Privately-Owned Public Utilities):
Per 15A NCAC 02T .0115(a)(1) and .0704(g), provide the Certificate of Public Convenience and Necessity from the North
Carolina Utilities Commission demonstrating the Applicant is authorized to hold the utility franchise for the area to be
served by the wastewater treatment and high-rate infiltration system, or
Provide a letter from the North Carolina Utilities Commission’s Water and Sewer Division Public Staff stating an
application for a franchise has been received and that the service area is contiguous to an existing franchised area or that
franchise approval is expected.
Existing Permit (All Modification Packages):
Submit the most recently issued existing permit.
Provide a list of any items within the permit the Applicant would like the Division to address during the permit modification
(i.e., compliance schedules, permit description, monitoring, permit conditions, etc.).
Final Environmental Document (All Application Packages using public monies or lands subject to the North Carolina
):
Environmental Policy Act under 15A NCAC 01C .0100 to .0400
Per 15A NCAC 02T .0105(c)(4), submit one copy of the environmental assessment and three copies of the final
environmental document (i.e., Finding of No Significant Impact or Record of Decision).
Include information on any mitigating factors from the Environmental Assessment that impact the design and/or
construction of the wastewater treatment and high-rate infiltration system.
Floodway Regulation Compliance (All Application Packages where any portion of the wastewater treatment, storage and
infiltration system is located within the 100-year floodplain):
Per 15A NCAC 02T .0105(c)(8), provide written documentation from all local governing entities that the facility is in
compliance with all local ordinances regarding construction or operation of wastewater treatment and/or disposal facilities
within the floodplain.
INSTRUCTIONS FOR FORM: HRIS 06-16 & SUPPORTING DOCUMENTATION Page 5 of 6

P. Additional Documentation (continued):
Operational Agreements (All Application Packages for Home/Property Owners' Associations and Developers of lots to be
sold):
Home/Property Owners’ Associations
Per 15A NCAC 02T .0115(c), submit the properly executed Operational Agreement (FORM: HOA).
Per 15A NCAC 02T .0115(c), submit the proposed or approved Articles of Incorporation, Declarations and By-laws.
Developers of lots to be sold
Per 15A NCAC 02T .0115(b), submit the properly executed Operational Agreement (FORM: DEV).
Threatened or Endangered Aquatic Species Documentation(All Application Packages):
Per 15A NCAC 02T .0105(c)(10), submit documentation from the Department’s Natural Heritage Program demonstrating
the presence or absence of threatened or endangered aquatic species within the boundary of the wastewater treatment,
storage and infiltration facilities.
If the facility directly impacts such species, this documentation shall provide information on the need for permit conditions
pursuant to 15A NCAC 02B .0110.
Wastewater Chemical Analysis (All Application Packages treating Industrial Waste):
Per 15A NCAC 02T .0704(h), provide a complete Division certified laboratory chemical analysis of the effluent to be
infiltrated for the following parameters (For new facilities, an analysis from a similar facility’s effluent is acceptable):
Ammonia Nitrogen (NH-N) Nitrate Nitrogen (NO-N) Total Organic Carbon
33
Calcium pH Total Phosphorus
Chemical Oxygen Demand (COD)PhenolTotal Trihalomethanes
ChlorideSodium Total Volatile Organic Compounds
Fecal Coliform Sodium Adsorption Ratio (SAR)Toxicity Test Parameters
5-day Biochemical Oxygen Demand (BOD) Total Dissolved Solids
5
Magnesium Total Kjeldahl Nitrogen (TKN)
THE COMPLETED APPLICATION AND SUPPORTING DOCUMENTATION SHALL BE SUBMITTED TO:
NORTH CAROLINA DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER RESOURCES
WATER QUALITY PERMITTING SECTION
NON-DISCHARGE PERMITTING UNIT

By U.S. Postal Service: By Courier/Special Delivery:
1617 MAIL SERVICE CENTER 512 N. SALISBURY ST.
RALEIGH, NORTH CAROLINA 27699-1617 RALEIGH, NORTH CAROLINA 27604

TELEPHONE NUMBER: [phone]FAX NUMBER: [phone]
INSTRUCTIONS FOR FORM: HRIS 06-16 & SUPPORTING DOCUMENTATION Page 6 of 6

State of North Carolina
Department of Environmental Quality
Division of Water Resources
15A NCAC 02T .0700 – HIGH-RATE INFILTRATION SYSTEMS
FORM: HRIS 06-16

I. APPLICANT INFORMATION:
1. Applicant's name: County of Currituck
2.Applicant type:Individual Corporation General PartnershipPrivately-Owned Public Utility
Federal State Municipal County
3. Signature authority’s name: Ben Stikeleather per 15A NCAC 02T .0106(b)Title: County Manager
4. Applicant’s mailing address: 153 Courthouse Road, Suite 302
City: Currituck State: NC Zip: 27929-
5. Applicant’s contact information:
Phone number: [phone] Email Address: [e-mail]
II. FACILITY INFORMATION:
1. Facility name: Ocean Sands WWTP
2. Facility status: Existing
3. Facility type:
4. Facility’s physical address: 741 Ocean Trail
City: Corolla State: NC Zip: 27927- County: Currituck
5. Wastewater Treatment Facility Coordinates (Decimal Degrees): Latitude: 36.322662 Longitude: -75.815341
Datum: NAD83 Level of accuracy: Nearest 10 seconds Method of measurement: Digital or raw photo extraction
6. USGS Map Name: Mossey Island, NC
III. CONSULTANT INFORMATION:
1. Professional Engineer: Eric T. Weatherly License Number: 014996 Firm: N/A
Mailing address: 153 Courthouse Road, Suite 302
City: CurrituckState: NCZip: 27929-
Phone number: [phone] Email Address: [e-mail]
2.Soil Scientist: License Number: Firm:
Mailing address:
City: State: Zip: -
Phone number: ( ) - Email Address:
3. Geologist: License Number: Firm:
Mailing address:
City: State: Zip: -
Phone number: ( ) - Email Address:
4. Agronomist: Firm:
Mailing address:
City: State: Zip: -
Phone number: ( ) - Email Address:
FORM: HRIS 06-16 Page 1 of 13

IV. GENERAL REQUIREMENTS – 15A NCAC 02T .0100:
1.Application type:NewMajor ModificationMinor Modification
If a modification, provide the existing permit number: WQ0000185 and most recent issuance date: August 4, 2020
2. Application fee: $0 - Standard - Minor Modification
3. Does this project utilize public monies or lands? Yes or No
If yes, was an Environmental Assessment required under 15A NCAC 01C? Yes or No
If yes, which final environmental document is submitted? Finding of No Significant Impact or Record of Decision
Briefly describe any mitigating factors from the Environmental Assessment that may impact this facility:
4. What is the status of the following permits/certifications applicable to the subject facility?
DateDatePermit/Certification
Permit/Certification Agency Reviewer
Submitted Approved Number

Dam Safety
Erosion & Sedimentation Control Plan
Nationwide 12 / Section 404
Pretreatment
Sewer System
Stormwater Management Plan
Wetlands 401
Other:
5. What is the wastewater type? Domestic or Industrial (See 15A NCAC 02T .0103(20))
Is there a Pretreatment Program in effect? Yes or No
Has a wastewater chemical analysis been submitted? Yes or No
6. Wastewater flow: 600,000 GPD
Limited by: Treatment, Storage, Field/Basin Hydraulics, Field Agronomics or Groundwater Mounding
7. Explain how the wastewater flow was determined: 15A NCAC 02T .0114 or Representative Data
Has a flow reduction been approved under 15A NCAC 02T .0114(f)? Yes or No
a
Establishment Type Daily Design Flow No. of Units Flow
gal/ GPD
gal/ GPD
gal/ GPD
gal/ GPD
gal/ GPD
gal/ GPD
Total GPD
a
See 15A NCAC 02T .0114(b), (d), (e)(1) and (e)(2) for caveats to wastewater design flow rates (i.e., minimum flow per
dwelling; proposed unknown non-residential development uses; public access facilities located near high public use areas;
and residential property located south or east of the Atlantic Intracoastal Waterway to be used as vacation rentals as defined
in G.S. 42A-4).

FORM: HRIS 06-16 Page 2 of 13

IV. GENERAL REQUIREMENTS – 15A NCAC 02T .0100 (continued):
8.What is the nearest 100-year flood elevation to the facility? feet mean sea level. Source:
Are any treatment, storage or infiltration facilities located within the 100-year flood plain? Yes or No
If yes, which facilities are affected and what measures are being taken to protect them against flooding?
If yes, has the Applicant submitted written documentation of compliance with §143 Article 21 Part 6? Yes or No
9. Has the Applicant provided documentation of the presence or absence of threatened or endangered aquatic species utilizing
? Yes or No
information provided by the Department’s Natural Heritage Program
10. Does the facility have a proposed or existing groundwater monitoring well network? Yes or No
If no, provide an explanation as to why a groundwater monitoring well network is not proposed:
If yes, complete the following table (NOTE – This table may be expanded for additional wells):
aa
Longitude Gradient Location
Well Name Status Latitude
Select . - . Select Select
Select.-.SelectSelect
Select . - . Select Select
Select . - . Select Select
Select . - . Select Select
Select . - . Select Select
Select . - . Select Select
Select . - . Select Select
Select . - . Select Select
Select . - . Select Select
a
Provide the following latitude and longitude coordinate determination information:
Datum: Select Level of accuracy: Select Method of measurement: Select
11. If the Applicant is a Privately-Owned Public Utility, has a Certificate of Public Convenience and Necessity been submitted?
Yes, No or N/A
12. If the Applicant is a Developer of lots to be sold, has a Developer’s Operational Agreement (FORM: DEV) been submitted?
Yes,No or N/A
13. If the Applicant is a Home/Property Owners' Association, has an Association Operational Agreement (FORM: HOA) been
submitted? Yes, No or N/A
14. Demonstration of historical consideration for permit approval – 15A NCAC 02T .0120:
Has the Applicant or any parent, subsidiary or other affiliate exhibited the following?
a. Has been convicted of environmental crimes under Federal law or G.S. 143-215.6B? Yes or No
b. Has previously abandoned a wastewater treatment facility without properly closing that facility? Yes or No
c. Has unpaid civil penalty where all appeals have been abandoned or exhausted? Yes or No
d. Is non-compliant with an existing non-discharge permit, settlement agreement or order? Yes or No
e. Has unpaid annual fees in accordance with 15A NCAC 02T .0105(e)(2)? Yes or No

FORM: HRIS 06-16 Page 3 of 13

V. WASTEWATER TREATMENT FACILITY DESIGN CRITERIA – 15A NCAC 02T .0705:
1.For the following parameters, provide the estimated influent concentrations and designed effluent concentrations as
determined in the Engineering Calculations, and utilized in the Agronomic Evaluation and Groundwater Modeling (if
applicable):
Designed Effluent Concentration
Parameter Estimated Influent Concentration
(monthly average)
Ammonia Nitrogen (NH-N) mg/L mg/L
3
Biochemical Oxygen Demand (BOD) mg/L mg/L
5
Fecal Coliforms per 100 mL
Nitrate Nitrogen (NO-N) mg/L mg/L
3
Nitrite Nitrogen (NO-N) mg/L mg/L
2
Total Kjeldahl Nitrogen mg/L
Total Nitrogenmg/Lmg/L
Total Phosphorus mg/L mg/L
Total Suspended Solids (TSS) mg/L mg/L
2. Is flow equalization of at least 25% of the average daily flow provided? Yes or No
3. Does the treatment facility include any bypass or overflow lines? Yes or No
If yes, describe what treatment units are bypassed, why this is necessary, and where the bypass discharges:
4. Are multiple pumps provided wherever pumps are used? Yes or No
If no, how does the Applicant intend on complying with 15A NCAC 02T .0705(j)?
5. Check the appropriate box describing how power reliability will be provided in accordance with 15A NCAC 02T .0705(k):
Automatically activated standby power supply onsite capable of powering all essential treatment units; or
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;
Has sufficient storage capacity that no potential for overflow exists; and
Can tolerate septic wastewater due to prolonged detention.
6. If the wastewater treatment system is located within the 100-year flood plain, are there water-tight seals on all treatment units
Yes, No or N/A
or a minimum of two feet protection from the 100-year flood plain elevation?
7. In accordance with 15A NCAC 02T .0705(n), how many days of residuals storage are provided?
8. How does the Applicant propose to prohibit public access to the wastewater treatment and storage facilities?
9. If an influent pump station is part of the proposed facility (i.e., within the wastewater treatment plant boundary), does the
influent pump station meet the design criteria in 15A NCAC 02T .0305(h)? Yes, No, N/A – To be permitted
separately, or N/A – Gravity fed
10. If septic tanks are part of the wastewater treatment facility, do the septic tanks adhere to the standards in 15A NCAC 18A
.1900? Yes, No or N/A

FORM: HRIS 06-16 Page 4 of 13

V. WASTEWATER TREATMENT FACILITY DESIGN CRITERIA – 15A NCAC 02T .0705 (continued):
11.Provide the requested treatment unit and mechanical equipmentinformation:
a. PRELIMINARY / PRIMARY TREATMENT (i.e., physical removal operations and flow equalization):
No. of Manufacturer or Dimensions (ft) / Volume Plan Sheet Specification
Treatment Unit
Units Material Spacings (in) (gallons) Reference Reference
Select
Select
Select
Select
Select
b. SECONDARY / TERTIARY TREATMENT (i.e., biological and chemical processes to remove organics and nutrients)
No. of Manufacturer or VolumePlan Sheet Specification
Treatment Unit Dimensions (ft)
Units Material (gallons) ReferenceReference
Select
Select
Select
Select
Select
Select
Select
Select
c. DISINFECTION
No. of Manufacturer or Volume Plan Sheet Specification
Treatment Unit Dimensions (ft)
Units Material (gallons) Reference Reference
Select
Select
If chlorination is the proposed method of disinfection, specify detention time provided: minutes (NOTE – 30
minutes minimum required), and indicate what treatment unit chlorine contact occurs:
If ultraviolet (UV) light is the proposed method of disinfection, specify the number of banks: , number of lamps
per bank: and maximum disinfection capacity: GPM.
d. RESIDUAL TREATMENT
No. of Manufacturer or VolumePlan Sheet Specification
Treatment Unit Dimensions (ft)
Units Material (gallons) ReferenceReference
Select
Select

FORM: HRIS 06-16 Page 5 of 13

V. WASTEWATER TREATMENT FACILITY DESIGN CRITERIA – 15A NCAC 02T .0705 (continued):
e.PUMPS
Capacity
No. of Manufacturer / Plan Sheet Specification
Purpose
Location
GPMTDH
Pumps TypeReference Reference

f. BLOWERS
No. of Manufacturer / Capacity Plan Sheet Specification
Location Units Served
Blowers Type(CFM) Reference Reference

g. MIXERS
No. of Manufacturer / Power Plan Sheet Specification
Location Units Served
Mixers Type (hp)Reference Reference

h. RECORDING DEVICES & RELIABILITY
No. of Maximum Plan Sheet Specification
Location Manufacturer
Device
Units Capacity Reference Reference
Select
Select
Select
Select
i. EFFLUENT PUMP / DOSING TANK (IF APPLICABLE):
Plan Sheet Specification

Reference Reference
Internal ft ft ft
3
Total volume ft gallons
3
Dosing volume ft gallons
Audible & visual alarms
Equipment to prevent infiltration during rain

events (if applicable)
FORM: HRIS 06-16 Page 6 of 13

VI. EARTHEN STORAGE IMPOUNDMENT DESIGN CRITERIA – 15A NCAC 02T .0705:
IF MORE THAN ONE IMPOUNDMENT, PROVIDE ADDITIONAL COPIES OF THIS PAGE AS NECESSARY.
1.What is the earthenimpoundmenttype?Select
2. Storage Impoundment Coordinates (Decimal Degrees): Latitude: . Longitude: - .
Datum: Select Level of accuracy: Select Method of measurement: Select
3. Do any impoundments include a discharge point (pipe, spillway, etc)? Yes or No
4. Are subsurface drains present beneath or around the impoundment to control groundwater elevation? Yes or No
5. Is the impoundment designed to receive surface runoff? Yes or No
2
If yes, what is the drainage area? ft, and was this runoff incorporated into the water balance? Yes or No
6. If a liner is present, how will it be protected from wind driven wave action?:
7. Will the earthen impoundment water be placed directly into or in contact with GA classified groundwater? Yes or No
If yes, has the Applicant provided predictive calculations or modeling demonstrating that such placement will not result in a
contravention of GA groundwater standards? Yes or No
8. What is the depth to bedrock from the earthen impoundment bottom elevation? ft
If the depth to bedrock is less than four feet, has the Applicant provided a liner with a hydraulic conductivity no greater than
-7
cm/s? Yes, No or N/A
1 x 10
Has the Applicant provided predictive calculations or modeling demonstrating that surface
Yes or No
water or groundwater standards will not be contravened?
If the earthen impoundment is excavated into bedrock, has the Applicant provided predictive calculations or modeling
Yes, No or N/A
demonstrating that surface water or groundwater standards will not be contravened?
9. If the earthen impoundment is lined and the mean seasonal high water table is higher than the impoundment bottom
elevation, how will the liner be protected (e.g., bubbling, groundwater infiltration, etc.)?
10. If applicable, provide the specification page references for the liner installation and testing requirements:
11. If the earthen impoundment is located within the 100-year flood plain, has a minimum of two feet of protection (i.e., top of
embankment elevation to 100-year flood plain elevation) been provided? Yes or No
12. Provide the requested earthen impoundment design elements and dimensions:
Earthen Impoundment Design Elements Earthen Impoundment Dimensions
Clay Synthetic
Liner type: Top of embankment elevation: ft
OtherUnlined
-
Liner hydraulic conductivity: x cm/s Freeboard elevation: ft
Hazard class: Select Toe of slope elevation: ft
Designed freeboard: ft Impoundment bottom elevation: ft
3
Total volume: ft gallons Mean seasonal high water table depth: ft
3
Effective volume: ft gallons Embankment slope: :
2
Effective storage time: days Top of dam water surface area: ft
2
Plan Sheet Reference: Freeboard elevation water surface area: ft
2
Specification Section: Bottom of impoundment surface area: ft
NOTE – The effective volume shall be the volume between the two foot freeboard elevation and the: (1) pump intake pipe
elevation; (2) impoundment bottom elevation or (3) mean seasonal high water table, whichever is closest to the two foot
freeboard elevation.
FORM: HRIS 06-16 Page 7 of 13

VII. INFILTRATION SYSTEM DESIGN CRITERIA – 15A NCAC 02T .0705:
1.Provide the minimum depth to the seasonal high water table within the infiltrationarea:
NOTE–The vertical separation between the seasonal high water table and the ground surface shall be at least one foot.
2. Are there any artificial drainage or water movement structures (e.g., surface water or groundwater) within 200 feet of the
infiltration area? Yes or No
If yes, were these structures addressed in the Soil Evaluation and/or Hydrogeologic Report, and are these structures to be
maintained or modified?
3. Soil Evaluation recommended loading rates (NOTE – This table may be expanded for additional soil series):
Basins/Fields Recommended Recommended Recommended Annual / If Seasonal, list
Soil Series within Soil Loading RateLoading RateLoading RateSeasonal appropriate
2
Series (in/hr) (in/yr) (GPD/ft) Loading months
Select
Select
Select
Select
Select
Select
4. Are the designed loading rates less than or equal to Soil Evaluation recommended loading rates? Yes or No
If no, how does the Applicant intend on complying with 15A NCAC 02T .0705(m)?
5. How does the Applicant propose to prohibit public access to the infiltration facilities?
6. Has the infiltration system been equipped with a flow meter to accurately determine the volume of effluent applied to each
Yes or No
basin/field as listed in VII.8.?
If no, how does the Applicant intend on determining the amount of effluent applied to each basin/field?
7. For non-basins, provide the required cover crop information and demonstrate the effluent will be applied at or below
agronomic rates:
Nitrogen Uptake Rate Phosphorus Uptake
Cover Crop Soil Series % Slope
(lbs/ac) Rate

a. Specify where the nitrogen and phosphorus uptake rates for each cover crop were obtained:
b. Proposed nitrogen mineralization rate:
c. Proposed nitrogen volatilization rate:
2
d. Minimum infiltration area from the Agronomist Evaluation’s nitrogen balance: ft
2
e. Minimum infiltration area from the Agronomist Evaluation’s phosphorus balance: ft
2
f. Minimum infiltration area from the water balance: ft

FORM: HRIS 06-16 Page 8 of 13

VII. INFILTRATION SYSTEM DESIGN CRITERIA – 15A NCAC 02T .0705 (continued):
8.Basin/FieldInformation(NOTE–This tablemay be expanded for additional fields):

Designed Designed Designed
Waterbody
Basin/ Area Dominant Loading Loading Loading
aa
Latitude Longitude
Stream Classification
Field (acres) Soil Series Rate Rate Rate
b
Index No.
2
(in/hr)(in/yr)(GPD/ft)
. - .
. - .
. - .
. - .
. - .
. - .
. - .
.-.
. - .
. - .
. - .
. - .
. - .
. - .
. - .
. - .
. - .
. - .
Total
a
Provide the following latitude and longitude coordinate determination information:
Datum: Select Level of accuracy: Select Method of measurement: Select
b
For assistance determining the waterbody stream index number and its associated classification, instructions may be
downloaded at: http://deq.nc.gov/about/divisions/water-resources/planning/classification-standards/classifications
9. High-Rate Infiltration System design criteria:
a. Infiltration Fields:
Spray Infiltration Design Elements Drip Infiltration Design Elements
2
Nozzle wetted diameter: ft Emitter wetted area: ft
2
Nozzle wetted area: ftDistance between laterals: ft
Nozzle capacity: GPM Distance between emitters: ft
Nozzle manufacturer/model: / Emitter capacity: GPH
Elevation of highest nozzle: ft Emitter manufacturer/model: /
Specification Section: Elevation of highest emitter: ft
Specification Section:

FORM: HRIS 06-16 Page 9 of 13

VII.INFILTRATION SYSTEM DESIGN CRITERIA – 15A NCAC 02T .0705 (continued):
b.Infiltration Basins:
IF MORE THAN TWOBASINS, PROVIDE ADDITIONAL COPIES OF THIS PAGE AS NECESSARY.
Infiltration Basin Design ElementsInfiltration Basin Dimensions
Basin Name: Top of embankment elevation: ft
Hazard class: SelectFreeboard elevation: ft
Designed freeboard: ft Toe of slope elevation: ft
3
Total volume: ftImpoundment bottom elevation: ft
2
Infiltrative surface area:ftMean seasonal high water table depth: ft
Daily infiltrative capacity: GPD Embankment slope: :
2
Plan Sheet Reference: Top of dam water surface area: ft
2
Specification Section:Freeboard elevation water surface area:ft
2
Bottom of impoundment surface area: ft
i.Does this basin include a discharge point (pipe, spillway, etc)? Yes or No
ii.Are subsurface drains present around the impoundment to control groundwater elevation? Yes or No
iii.Is the basin designed to receive surface runoff?Yes or No
2
If yes, what is the drainage area? ft, and was this runoff incorporated into the loading rate? Yes or No
iv.Will the effluent be placed directly into or in contact with GA classified groundwater? Yes or No
If yes, has the Applicant provided predictive calculations or modeling demonstrating that such placement will not
Yes or No
result in a contravention of GA groundwater standards?
v.If the infiltration basin is located within the 100-year flood plain, has a minimum of two feet of protection (i.e., top of
embankment elevation to 100-year flood plain elevation) been provided? Yes or No
Infiltration Basin Design ElementsInfiltration Basin Dimensions
Basin Name: Top of embankment elevation: ft
Hazard class: SelectFreeboard elevation: ft
Designed freeboard: ft Toe of slope elevation: ft
3
Total volume: ftImpoundment bottom elevation: ft
2
Infiltrative surface area: ftMean seasonal high water table depth: ft
Daily infiltrative capacity:GPDEmbankment slope::
2
Plan Sheet Reference: Top of dam water surface area: ft
2
Specification Section: Freeboard elevation water surface area: ft
2
Bottom of impoundment surface area: ft
i.Does this basin include a discharge point (pipe, spillway, etc)? Yes or No
ii.Are subsurface drains present around the impoundment to control groundwater elevation? Yes or No
iii.Is the basin designed to receive surface runoff?Yes or No
2
If yes, what is the drainage area? ft, and was this runoff incorporated into the loading rate? Yes or No
iv.Will the effluent be placed directly into or in contact with GA classified groundwater? Yes or No
If yes, has the Applicant provided predictive calculations or modeling demonstrating that such placement will not
Yes or No
result in a contravention of GA groundwater standards?
v.If the infiltration basin is located within the 100-year flood plain, has a minimum of two feet of protection (i.e., top of
Yes or No
embankment elevation to 100-year flood plain elevation) been provided?
FORM: HRIS 06-16 Page 10 of 13

VIII.SETBACKS – 15A NCAC 02T .0706:
1.Does the project comply with all setbacks found in the river basin rules (15A NCAC 02B .0200)?Yes or No
If no, list non-compliant setbacks:
2.Have any setback waivers been obtained in order to comply with 15A NCAC 02T .706(a) and .0706(d)? Yes or No
If yes, have these waivers been written, notarized and signed by all parties involved and recorded with the County Register of
Deeds? Yes or No
3.Provide the minimum field observed distances (ft) for each setback parameter to the infiltration system and treatment/storage
units (NOTE – Distances greater than 500 feet may be marked N/A):
Infiltration Treatment /
Setback Parameter
SystemStorage Units
Any habitable residence or place of assembly under separate ownership or not to be
maintained as part of the project site
Any habitable residence or place of assembly owned by the Permittee to be maintained as
part of the project site
Any private or public water supply source
Surface waters (streams – intermittent and perennial, perennial waterbodies, and wetlands)
Groundwater lowering ditches (where the bottom of the ditch intersects the SHWT)
Subsurface groundwater lowering drainage systems
Surface water diversions (ephemeral streams, waterways, ditches)
Any well with exception of monitoring wells
Any property line
Top of slope of embankments or cuts of two feet or more in vertical height
Any water line from a disposal system
Any swimming pool
Public right of way
Nitrification field
Any building foundation or basement
Impounded public water supplies
Public shallow groundwater supply (less than 50 feet deep)
4.Does the Applicant intend on complying with either 15A NCAC 02T .0706(b) or (c)? Yes or No
If yes, what are the designed Total Nitrogen and Total Phosphorus effluent concentrations? TN: mg/L TP: mg/L
5.Does the Applicant intend on complying with the High-Rate Policyissued October 27, 2006? Yes or No
If yes, verify the following information:
Are the most stringent effluent standards in both 15A NCAC 02T .0705(b) and 15A NCAC 02U .0301(b) met?
Yes or No
Is duality provided for all treatment units per 15A NCAC 02U .0402(c)? Yes or No
Continuous online monitoring and recording of effluent for turbidity? Yes or No
A lined 5-day upset pond is provided? Yes or No
The 5-day upset pond has restricted access? Yes or No
A certified operator of a grade equal or greater than the facility classification is on call 24 hrs/day? Yes or No
FORM: HRIS 06-16 Page 11 of 13

IX. COASTAL WASTE TREATMENT DISPOSAL REQUIREMENTS – 15A NCAC 02H .0400:
1.Is this facility located in a Coastal Area as defined per 15A NCAC 02H .0403? Yes or No
For assistance determining if the facility is located within the Coastal Area, a reference map may be downloaded at: Coastal
Areas Boundary.
2. Is this an Interim Treatment and Disposal Facility per 15A NCAC 02H .0404(g)? Yes or No
NOTE – Interim facilities do not include County and Municipal area-wide collection and treatment systems.
IF ANSWERED YES TO ITEMS IX.1. AND IX.2., THEN COMPLETE ITEMS IX.3. THROUGH IX.16.
3. Is equalization of at least 25% of the average daily flow provided? Yes or No
4.How will noise and odor be controlled?
5. Is an automatically activated standby power source provided? Yes or No
6.Are all essential treatment units provided in duplicate? Yes or No
NOTE–Per 15A NCAC 02T .0103(16), essential treatment units are defined as any unit associated with the wastewater
treatment process whose loss would likely render the facility incapable of meeting the required performance criteria, including
aeration units or other main treatment units, clarification equipment, filters, disinfection equipment, pumps and blowers.
7. Are the disposal units (i.e., infiltration basins/fields) provided in duplicate? Yes or No
8. Is there an impounded public surface water supply within 500 feet of the infiltration area? Yes or No
9. Is there a public shallow groundwater supply (less than 50 feet deep) within 500 feet of the infiltration area? Yes or No
10. Is there a private groundwater supply within 100 feet of the infiltration area? Yes or No
11. Are there any SA classified waters within 100 feet of the infiltration area? Yes or No
12. Are there any non-SA classified waters within 50 feet of the infiltration area? Yes or No
13. Are there any surface water diversions (i.e., drainage ditches) within 25 feet of the infiltration area? Yes or No
2
14. Per the requirements in 15A NCAC 02H .0404(g)(7), how much green area is provided? ft
15. Is the green area clearly delineated on the plans? Yes or No
16. Is the spray infiltration wetted area within 200 feet of any adjoining properties? Yes, No or N/A
X. GROUNDWATER LOWERING SYSTEM DESIGN:
1. Does this project utilize a groundwater lowering system? Yes or No (If yes, complete Items X.2. through X.4.)
2. Is the groundwater lowering system: mechanically lowered (i.e., pumped) or gravity fed?
3. Where does the groundwater lowering drainage system discharge?
If the system mechanically lowers groundwater and discharges directly or indirectly (i.e., pond overflow) to surface waters,
wetlands and/or stormwater structures, provide the date the Applicant obtained written confirmation from the Water Quality
Regional Operations Section that operation of the groundwater lowering drainage system will not adversely affect surface
waters of the State. Submitted: & Received:
4. Groundwater lowering system design criteria:
Groundwater Lowering System Design
Pipe diameter: in Discharge rate: GPD
Pipe material: Method to measure discharge rate:
Pipe depth: ft Number of pumps:
Pipe length: ft Pump capacity: GPM TDH
Pipe slope (gravity-fed): % Plan Sheet Reference:
Trench backfill material: Specification Section:

FORM: HRIS 06-16 Page 12 of 13

PROPERTY OWNERSHIP
DOCUMENTATION
For
Odor Control System for Sludge Holding Tanks
Ocean Sands Wastewater Treatment Plant
400,000 GPD, Phase 2 and 3

DEQ Permit No. WQ0000185

County of Currituck
August 5, 2021

ENGINEERING PLANS
For
Odor Control System for Sludge Holding Tanks
Ocean Sands Wastewater Treatment Plant
400,000 GPD, Phase 2 and 3

DEQ Permit No. WQ0000185

County of Currituck
August 5, 2021

Specifications - Table of Contents
General Notes ............................................................................................................................................... 1
Site Work ....................................................................................................................................................... 1
Blower ........................................................................................................................................................... 1
Aeration Piping and Diffusers ....................................................................................................................... 2

General Notes
a. Provide manufacture submittals to the County establishing compliance with the specifications
for approval prior to installation.
b. Provide one year warranty on all parts and workmanship.
c. Contractor is responsible for all equipment delivery, handling, and storage.
d. Contractor is responsible for conducting pressure checks/tests to ensure equipment and
material functions properly.
e. Contractor shall obtain all necessary County building permits.
f. All electrical work shall meet NC Building Code requirements.
g. Provide manufacturers operation and maintenance manuals.
h. Coordinate pumping and hauling of sludge holding tanks (up to 152,808 gallons). Sludge holding
tanks to be completely empty for installation of pipping and drop pipe assembly.
Site Work
a. Contractor is responsible for identifying underground utilities.
b. Sub-base of concrete slab shall be compacted.
c. Expansion joint shall be installed where concrete slab meets existing tank walls.
d. Protection bollards shall be placed and installed as shown on the plans
e. Electrical conduit may be installed on ceiling and/or wall of building.
f. Electrical conduit may be underground outside of building.
Blower
a. General
i. Furnish and install positive displacement blower equipment and accessories, complete and
operational.
ii. Equip with noise reducing silencers on inlet and discharge.
iii. An air pressure relief valve preset at the factory shall be provided to protect the blower
against excessive differential pressures.
iv. Blower piping shall be equipped with a check valve to prevent backflow through the blower.
v. A rubber expansion joint (elastomeric flex connector) shall be provided to isolate the blower
from the self-supporting piping.
vi. Provide inlet discharge filters.
vii. Provide full, sound-attenuating enclosure which encases the entire package. Enclosure shall
have easy open access to maintenance areas. The enclosure shall be rated for outdoors
installation and made of aluminum.
viii. Provide all electrical wiring, conduit, and breaker(s) to connect to Panel H2 and/or L2 as
shown on the plans.

Page | 1

b. Design Criteria
i. Standard conditions: 14.7 psia, 68 deg F., 36% relative humidity
ii. Flow required: 215 SCFM
iii. Differential pressure: 14 psi
iv. Discharge pressure: 29 psig
v. Motor horsepower: 15 hp
vi. Power supply voltage: 460v/3ph/60hz
Aeration Piping and Diffusers
a. Install new galvanized Schedule 40 - 3 inch supply pipe and 1-1/2 inch drop pipe assembly
including fittings, unions, and diffusers in accordance to the attached plans.
b. Provide Snap Cap coarse air diffusers, Model 750 capable of flows up to 10 cfm, with ¾” NPT
connection.
Page | 2

Page 1 of 3
))))
3333
36,547.8039,856.4336,547.8039,856.43

(gal)
152,808.47

Volume
2
)
3
4,886.075,328.404,886.075,328.40

(ft
0.100.200.250.400.60
lb/in
Pressure Loss

2.752.002.752.00

48
/min
121620
(ft)
3
ft
Air flow
of sludge
Freeboard
3
Manufacturer's Specification

ft
1,000
13.2514.0013.2514.00

(ft)
Depth
/min per tank
3

(Sludge Holding Tank Volume)*(Design flow rate) / (1,000 ft(Sludge Holding Tank Volume)*(Design flow rate) / (1,000 ft(Sludge Holding Tank Volume)*(Design flow rate) / (1,000 ft(Sludge
Holding Tank Volume)*(Design flow rate) / (1,000 ft ft
215
13.1713.8413.1713.84

195.44213.14195.44213.14

/min)
(ft)
3
Width
/min per
3
Air Flow
(ft
ft

-in
40
750
0.75
28.0027.5028.0027.50

)
3
(ft)
4,886.075,328.404,886.075,328.40

(ft
Length
Volume
Evoqua Snap-Cap Diffusers

Sludge Tank Volumes
Sludge Holding Tank #1Sludge Holding Tank #2Sludge Holding Tank #3Sludge Holding Tank #4Sludge Holding Tank #1Sludge Holding Tank #2Sludge Holding Tank #3Sludge Holding Tank #4Use:Product:
Model:NPT:
Engineering CalculationsOdor Control System for Sludge Holding TanksOcean Sands Wastewater Treatment Plant - 400,000 gpd, Phase 2 and 3 Design Flow Rate Reference: Odor Control in Wastewater
Treatment Plants, WEF Manual of Practice No. 22, ASCE Manuals and Reports on Engineering Practice No. 82 Air RequirementsPressure Losses
7/30/2021

Page 2 of 3
2
(Air flow)/(Total diffusers per tank)Interpolation based on manufacturer's specifications(Total diffusers per tank)*(Pressure loss per diffuser)ftlb/ft
0.25630.050.134
per
2
2
/min per
3
ftdiffuserlb/indiffuser lb/in From blower to furthest end of pipe in Sludge Tank #1/#3Calculated aboveQ/AStandardStandardStandardPipe mateiral: galvanized ironD*v*Moody diagram - Update
based on pipe diameterDrop pipe assemblyCalculated aboveQ/AStandard
48
4.48
0.112
5.375
2
3
22
/min, /min,
2323
ftinin (Schedule 40) ftftft/sft/s°Flb/ftlb/ft*sft---lb/inftinin (Schedule 40) ftftft/sft/s°F
3
5470681768
1.5
215215253
32.20.211.6132.2
3.0680.0510.0020.0250.014
0.0005
1.1E+05
0.075234
=
0.00001227
=
=
L
Total diffusers per tank per blower:Air flow per diffuser:Pressue loss per diffuser:Total pressure loss from diffusers:Fricton loss through air pipe: Length of 3 in pipe, L =Nominal
pipe diameter = Inside pipe diameter, D = Area of pipe, A =Required air flow rate, Q =Air velocity, v =Gravity, g =Design temperature, T =Air density at T, Air viscosity at T, Pipe
wall roughness, Reynolds Number, Re =Relative roughness, Friction factor, f (Re, Friction loss, PLength of 1-1/2 in pipe, L =Nominal pipe diameter = Inside pipe diameter, D = Area of
pipe, A =Required air flow rate, Q =Air velocity, v =Gravity, g =Design temperature, T =
7/30/2021

Page 3 of 3
2
lb/ft
275.77
StandardStandardPipe mateiral: galvanized ironD*v*Moody diagram - Update based on pipe diameterTotal friction loss in 3 inch and 1-1/2 inch pipe(Total pressure loss from diffusers)+(Total
friction loss)Based on max level of sludge tankCalculated above(Head pressure)+(Total pressure loss); round upElevation = 0 ft MSLStandard(Total pressure differential) + (Elevation
pressure); round up
2
2222222
3
/min
3
lb/ftlb/ft*sft---lb/in lb/in lb/inftlb/inlb/inlb/inlb/in°Flb/inft
68
215
1.927.386.067.3814.7
2.00
0.0040.02914.0029.00
14.00

0.0005
2.1E+05
0.075234
0.00001227

460V, 3ph, 60 hz
=
=
L
Air density at T, Air viscosity at T, Pipe wall roughness, Reynolds Number, Re =Relative roughness, Friction factor, f (Re, Friction loss, P Total friction loss = Total pressure loss:Head
pressure (static):Total pressure loss:Total pressure differential:Elevation pressure:Temperature:Blower discharge pressure:Flow discharge:Power:
Blower Requirement
7/30/2021

OPERATION AND MAINTENANCE
PLAN
For
Odor Control System for Sludge Holding Tanks
Ocean Sands Wastewater Treatment Plant
400,000 GPD, Phase 2 and 3

DEQ Permit No. WQ0000185

County of Currituck
August 5, 2021

General Operation
The purpose of the blower is to reduce the odors of the sludge holding tanks by aerating and mixing the
sludge to prevent the formation of a hard, crust-like layer. The blowers for the four sludge holding tanks
shall be operated manually by the plant operator. Run the blower as needed to prevent the formation
of a sludge blanket and to reduce odors. The blower can be turned off to allow solids to settle and to
allow an improved quality of decant to the head of the plant.
Two butterfly valves are located on the air piping near the blower and is used to divert air flow to the
desired sludge holding tank. The valves are one-quarter turn with notches to fine tune air flow. The
blower system is designed to operate one sludge tank at a time. It is important that at least one
butterfly valve is open prior to starting the blower.
The blower is turned on and off by a switch located on the sludge tank wall next to the blower. There is
a separate switch for the cooling fan in the blower housing which is located next to the blower switch.
This cooling fan should be operated while the blower is in operation. The blower shall be operated as
necessary to prevent the formation of a sludge blanket and to reduce odors.

General Maintenance
The operator shall follow the maintenance schedules listed in the operations and maintenance manual
provided by the manufacturer of the equipment. In general, the operator shall be familiar with the
manufacturer’s manual by carefully reading through it before operating the equipment.

EXISTING PERMIT
For
Odor Control System for Sludge Holding Tanks
Ocean Sands Wastewater Treatment Plant
400,000 GPD, Phase 2 and 3

DEQ Permit No. WQ0000185

County of Currituck
August 5, 2021

Figure 1 - Ocean Sands WWTP
MW-9
MW-5
SW-1
XY
XY
XY
New 600,000 GPD WWTP
k
MW-7
XY
XY
MW-4
500,000 GPD WWTP
k
XY
MW-6
Settlement Agreement DB:230, PG:600
Legend
Monitoring Location
XY
Compliance Boundary
Review Boundary
9045090180270360
Property Lines
Feet
Groundwater Lowering System
²
Esri, HERE, Garmin, © OpenStreetMap contributors, and the GIS user community,
Spray Infiltration
Source: Esri, DigitalGlobe, GeoEye, Earthstar Geographics, CNES/Airbus DS,
USDA, USGS, AeroGRID, IGN, and the GIS User Community

notary PuDiic oT tne iounTy ana ataLe dTQre541Q, C;erLjjy i6jia6
6 ke h _. personally came before me this day and
vx-_, ac Wowledged tUtShe IS Secretary of OCEAN SANDS. INC., a North
\A,\ Carolina corporation, and tfiat' b—y authority duly given and as the act of
the corporation, the foregoing instrument was signed in its name by its
President, sealed with its corporatyeal and attested by
Secretary. Witness my hand and as its
(*c a stamp or seal, day
MARY PUBLIC'
14Y c ion expires: ......
The 1`6400ing instrument has been pre -audited in the manner required by
the Local "rnment Budget and Fiscal Control Act�
57-
"A �hMance Office
0
NORTH CAROLINA, CURRITUCK COU"Y
'F41 . IX .
is (are) certified
to be correct. This Instrument was presented for)em" t' tio at_?;"'clock _a1V2_,0n Llwk�
19-a and recorded in Book Page V
,A
r of Uved�3�e_
CW
0
D putt'
eputy, RoagiWgof eds
er of De

COROLLA - CURRITUCK COUNTY
400,000 GPD PHASE 2 AND 3
Currituck, NC 27929
OCEAN SANDS WWTP
153 Courthouse Rd, Suite 302
COVER
Engineering Department
SLUDGE HOLDING TANKS
1
PERMIT/BID/CONSTRUCTION (NWI)07/29/2021
ODOR CONTROL SYSTEM FOR
DateNo.
Description
SCALE: NTSSHEET
E
S
N
W

COROLLA - CURRITUCK COUNTY
400,000 GPD PHASE 2 AND 3
Currituck, NC 27929
10
OCEAN SANDS WWTP
153 Courthouse Rd, Suite 302
1 of
Engineering Department
SLUDGE HOLDING TANKS
1
PERMIT/BID/CONSTRUCTION (NWI)07/29/2021
ODOR CONTROL SYSTEM FOR
DateNo.
Description
SCALE: 1:40SHEET

COROLLA - CURRITUCK COUNTY
400,000 GPD PHASE 2 AND 3
Currituck, NC 27929
10
OCEAN SANDS WWTP
153 Courthouse Rd, Suite 302
2 of
Engineering Department
SLUDGE HOLDING TANKS
1
PERMIT/BID/CONSTRUCTION (NWI)07/29/2021
ODOR CONTROL SYSTEM FOR
DateNo.
Description
SCALE: 1:30SHEET

COROLLA - CURRITUCK COUNTY
400,000 GPD PHASE 2 AND 3
Currituck, NC 27929
10
OCEAN SANDS WWTP
153 Courthouse Rd, Suite 302
3 of
Engineering Department
SLUDGE HOLDING TANKS
1
PERMIT/BID/CONSTRUCTION (NWI)07/29/2021
ODOR CONTROL SYSTEM FOR
DateNo.
Description
SCALE: 1:30SHEET

COROLLA - CURRITUCK COUNTY
400,000 GPD PHASE 2 AND 3
Currituck, NC 27929
10
OCEAN SANDS WWTP
153 Courthouse Rd, Suite 302
4 of
Engineering Department
SLUDGE HOLDING TANKS
1
PERMIT/BID/CONSTRUCTION (NWI)07/29/2021
ODOR CONTROL SYSTEM FOR
DateNo.
Description
SCALE: 1:40SHEET

COROLLA - CURRITUCK COUNTY
400,000 GPD PHASE 2 AND 3
Currituck, NC 27929
10
OCEAN SANDS WWTP
153 Courthouse Rd, Suite 302
Engineering Department
SLUDGE HOLDING TANKS
1
PERMIT/BID/CONSTRUCTION (NWI)07/29/2021
ODOR CONTROL SYSTEM FOR
DateNo.
Description
SCALE: NTSSHEET 5 of

COROLLA - CURRITUCK COUNTY
400,000 GPD PHASE 2 AND 3
Currituck, NC 27929
10
OCEAN SANDS WWTP
153 Courthouse Rd, Suite 302
6 of
Engineering Department
SLUDGE HOLDING TANKS
1
PERMIT/BID/CONSTRUCTION (NWI)07/29/2021
ODOR CONTROL SYSTEM FOR
DateNo.
Description
SCALE: NTSSHEET

COROLLA - CURRITUCK COUNTY
400,000 GPD PHASE 2 AND 3
Currituck, NC 27929
10
OCEAN SANDS WWTP
153 Courthouse Rd, Suite 302
7 of
Engineering Department
SLUDGE HOLDING TANKS
1
PERMIT/BID/CONSTRUCTION (NWI)07/29/2021
ODOR CONTROL SYSTEM FOR
DateNo.
Description
SCALE: NTSSHEET

COROLLA - CURRITUCK COUNTY
400,000 GPD PHASE 2 AND 3
Currituck, NC 27929
10
OCEAN SANDS WWTP
153 Courthouse Rd, Suite 302
8 of
Engineering Department
SLUDGE HOLDING TANKS
1
PERMIT/BID/CONSTRUCTION (NWI)07/29/2021
ODOR CONTROL SYSTEM FOR
DateNo.
Description
SCALE: NTSSHEET

COROLLA - CURRITUCK COUNTY
400,000 GPD PHASE 2 AND 3
Currituck, NC 27929
10
OCEAN SANDS WWTP
153 Courthouse Rd, Suite 302
9 of
Engineering Department
SLUDGE HOLDING TANKS
1
PERMIT/BID/CONSTRUCTION (NWI)07/29/2021
ODOR CONTROL SYSTEM FOR
DateNo.
Description
SCALE: NTSSHEET

COROLLA - CURRITUCK COUNTY
10
400,000 GPD PHASE 2 AND 3
Currituck, NC 27929
OCEAN SANDS WWTP
153 Courthouse Rd, Suite 302
10 of
Engineering Department
SLUDGE HOLDING TANKS
1
PERMIT/BID/CONSTRUCTION (NWI)07/29/2021
ODOR CONTROL SYSTEM FOR
DateNo.
Description
SCALE: NTSSHEET