NC0022691_Authorization to Construct_20170109

December 19, 2016
North Carolina Department of Environmental Quality
Division of Water Resources / NPDES
512 N. Salisbury Street, 9th Floor
Raleigh, North Carolina 27604
RE: Application for Authorization to Construct Permit
NPEDS Permit No. NCO022691
Autumn Forest Wastewater Treatment Plant
3700 Autumn Forest Drive
Browns Summit, Guilford County, North Carolina
To whom it may concern:
On behalf of Yes AF Utilities EXP, LLC (Yes), Apex Companies, LLC, d.b.a. Maryland Apex
Engineering P.C. (Apex), is pleased to submit this Application for Authorization to Construct Permit
for the treatment process modification to the Autumn Forest Wastewater Treatment Plant (WWTP)
located at 3700 Autumn Forest Drive in Browns Summit, North Carolina. Specifically, the treatment
process modification involves the addition of aluminum chloride to the WWTP aeration basin in order
to reduce phosphorus concentrations in the system effluent.
The chemical feed setup consists of a Chem -Tech Pulsafeeder Model Series XP peristaltic pump
that pumps the aluminum chloride solution from a 15 -gallon drum to the WWTP aeration basin.
Manual controls are used to adjust the chemical flow rate. The chemical addition system was
installed on July 3, 2014 as a pilot test to ensure the chemical added would effectively treat the
phosphorus in the waste water treatment plant to meet effluent discharge limitation while not being
too expensive or creating operation complications. Since November 2014, the pilot system has
performed well and has consistently met the effluent discharge requirements. During the pilot test
period, the operator has had two incidents with the system. The first occurred in the second quarter
of 2015 when the plan operator received the wrong chemical from the supplier and did not figure it
out for about six weeks. The second happened this year between March 2016 and September 2016
when we had an operator who was not maintaining the chemical feed system. We replaced the
previous operator with one who is doing a better job of adjusting and maintaining the chemical feed
system and we are now seeing the effluent phosphorus levels drop below the permit limit.
On behalf of Yes, Apex is submitting the Application for Authorization to Construct Permit to continue
operating the existing chemical feed constructed for the pilot study. Attachments submitted as part
of this application package include:
• Application for Authorization to Construct Permit
• A copy of the NPDES Permit — Part I
• Engineering Plans
• Engineering Calculations
Maryland Apex Engineering, LP • 10610 Metromont Parkway, Suite 206 • Charlotte, NC 28269 • T 704.799.6390 • F 704.799.6395 • apexcos.com

NCDEQ — NPDES December 19, 2016
Application for Authorization to Construct (NC0022691) Page 2
If you have any questions or concerns, please do not hesitate to contact the undersigned at (704)
799-6390 ext. 4804.XA
Sincerely,
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Apex Companies, LLC
aryls Apex n eerin� PC SEAL '
Annie Haluska
Scott S. Huismann, PE - -
Project Manager
Director = 23779 -
NC License Number 23779 '•
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APEX

North Carolina Division of Water Resources State of North Carolina
Department of Environment and Natural Resources
Division of Water Resources
APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT (FORM ATC -12-14)
SECTION 1: INSTRUCTIONS AND INFORMATION
A. The Division of Water Resources will accept this application package for review only if all of the items are provided and the
application is complete. Failure to submit all of the required items will result in the application package being returned as incomplete
per 15A NCAC 02T .0105(b).
B. Plans and specifications must be prepared in accordance with 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.
C. The plans and specifications submitted must represent a completed final design that is ready to advertise for bid.
D. Any content changes made to this Form ATC -12-14 shall result in the application package being returned.
E. The Applicant shall submit ONE ORIGINAL and ONE DIGITAL COPY (CD) of the application, all supporting documentation and
attachments. All information must be submitted bound or in a 3 -ring binder, with a Section tab for each Section, except the
Engineering Plans.
F. Check the boxes below to indicate that the information is provided and the requirements are met.
G. If attachments are necessary for clarity or due to space limitations, such attachments are considered part of the application
package and must be numbered to correspond to the item referenced.
H. For any project that requires review under the State Environmental Policy Act (SEPA), an Authorization to Construct cannot be
issued prior to the completion of a State Clearinghouse advertisement period for a FONSI, EIS, etc. unless the project qualifies for
a Determination of Minor Construction Activity.
I. For more information, visit the Division of Water Resources web site at: http://portal.ncdenr.org/web/wq/swp/ps/npdes.
J. In addition to this Authorization to Construct, the Applicant should be aware that other permits may be required from other Sections
of the Division of Water Resources (for example: reclaimed water facilities permits; Class A or B biosolids residuals permit).
SECTION 2: APPLICANT INFORMATION AND PROJECT DESCRIPTION
A. APPLICANT
Applicant's name
Yes AF Utilities EXP, LLC
Signature authority's name per 15A NCAC 02T .0106(b)
Andrew Luter
Signature authority's title
Chief Investment Officer
Complete mailing address
1900 16' Street, Suite 950, Denver, Colorado 80202
Telephone number
303-577-5703
Email address
[e-mail]
B. PROFESSIONAL ENGINEER
Professional Engineer's name
Scott S. Huismann
Professional Engineer's title
Director
North Carolina Professional Engineer's License No.
23779
Firm name
Maryland Apex Engineering, PC
Firm License number
C-3073
Complete mailing address
10610 Metromont Parkway, Suite 206, Charlotte, NC 28269
Telephone number
704-799-6390
Email address
[e-mail]
Application for Authorization to Construct Permit (FORM ATC -12-14) Page 1

North Carolina Division of Water Resources State of North Carolina
Department of Environment and Natural Resources
Division of Water Resources
APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT (FORM ATC -12-14)
C. NPDES PERMIT
NPDES Permit number
NCO022691
Current Permitted flow (MGD) — include permit
flow phases if applicable
0.082 MGD
D. PROJECT DESCRIPTION
Provide a brief description of the project: A treatment process modification involving a poly -aluminum chloride chemical feed
into the aeration basin for phosphorous reduction.
SECTION 3: APPLICATION ITEMS REQUIRED FOR SUBMITTAL FOR ALL PROJECTS
A. Cover Letter
® The letter must include a request for the Authorization to Construct; the facility NPDES Number; a brief project description
that indicates whether the project is a new facility, facility modification, treatment process modification, or facility expansion;
the construction timeline; and a list of all items and attachments included in the application package.
❑ If any 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 are not met by the proposed design, the letter must include an itemized list of the requirements that are not met.
B. NPDES Permit
® Submit Part I of the Final NPDES permit for this facility that includes Part A (Effluent Limitations and Monitoring Requirements)
for the monthly average flow limit that corresponds to the work that is requested for this project.
C. Special Order by Consent
❑ If the facility is subject to any Special Orders by Consent (SOC), submit the applicable SOC.
® Not Applicable.
D. Finding of No Significant Impact or Record of Decision
❑ Submit a copy of the Finding of No Significant Impact or Record of Decision for this project.
❑ Provide a brief description of any of the mitigating factors or activities included in the approved Environmental Document
that impact any aspect of design of this project, if not specified in the Finding of No Significant Impact or Record of Decision.
® Not Applicable.
E. Engineering Plans
® Per 15A NCAC 02T .0504(c)(1), submit one set of detailed plans that have been signed, sealed and dated by a North Carolina
Licensed Professional Engineer.
® Per 21 NCAC 56.1103(a)(6), the name, address and License number of the Licensee's firm shall be included on each sheet of
the engineering drawings.
® Plans must be labeled as follows: FINAL DRAWING — FOR REVIEW PURPOSES ONLY— NOT RELEASED FOR CONSTRUCTION.
® 15A NCAC 02H .0124 requires multiple (dual at a minimum) components such as pumps, chemical feed systems, aeration
equipment and disinfection equipment. Is this requirement met by the design? ® Yes or ❑ No. If no, provide an
explanation:
Application for Authorization to Construct Permit (FORM ATC -12-14) Page 2

North Carolina Division of Water Resources State of North Carolina
Department of Environment and Natural Resources
Division of Water Resources
APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT (FORM ATC -12-14)
Plans shall include:
® Plans for all applicable disciplines needed for bidding and construction of the proposed project (check as appropriate):
❑ Civil ® Not Applicable
® Process Mechanical
❑ Not Applicable
❑ Structural
® Not Applicable
® Electrical
❑ Not Applicable
❑ Instrumentation/Controls
® Not Applicable
❑ Architectural
® Not Applicable
❑ Building Mechanical
® Not Applicable
❑ Building Plumbing
® Not Applicable
® Plan and profile views and associated details of all modified treatment units including piping, valves, and equipment (pumps,
blowers, mixers, diffusers, etc.)
❑ Are any modifications proposed that impact the hydraulic profile of the treatment facility? ❑ Yes or ® No. If yes, provide
a hydraulic profile drawing on one sheet that includes all impacted upstream and downstream units. The profile shall include
the top of wall elevations of each impacted treatment unit and the water surface elevations within each impacted treatment
unit for two flow conditions: (1) the NPDES permitted flow with all trains in service and (2) the peak hourly flow with one
treatment train removed from service.
❑ Are any modifications proposed that impact the process flow diagram or process flow schematic of the treatment facility?
❑ Yes or ®No. If yes, provide the process flow diagram or process flow schematic showing all modified flow paths including
aeration, recycle/return, wasting, and chemical feed, with the location of all monitoring and control instruments noted.
F. ❑ Engineering Specifications — Treatment Process was already constructed during pilot study.
❑ Per 15A NCAC 02T .0504(c)(2), submit one set of specifications that have been signed, sealed and dated by a North Carolina
Licensed Professional Engineer.
❑ Specifications must be labeled as follows: FINAL SPECIFICATIONS — FOR REVIEW PURPOSES ONLY — NOT RELEASED FOR
CONSTRUCTION.
Specifications shall include:
❑ Specifications for all applicable disciplines needed for bidding and construction of the proposed project (check as
appropriate):
❑ Civil ® Not Applicable
❑ Process Mechanical ® Not Applicable
❑ Structural ® Not Applicable
❑ Electrical ® Not Applicable
❑ Instrumentation/Controls ® Not Applicable
❑ Architectural ® Not Applicable
❑ Building Mechanical ® Not Applicable
❑ Building Plumbing ® Not Applicable
❑ Detailed specifications for all treatment units and processes including piping, valves, equipment (pumps, blowers, mixers,
diffusers, etc.), and instrumentation.
❑ Means of ensuring quality and integrity of the finished product including leakage testing requirements for structures and
pipelines, and performance testing requirements for equipment.
Application for Authorization to Construct Permit (FORM ATC -12-14) Page 3

Noah Carolina Division of Water Resources State of North Carolina
Department of Environment and Natural Resources
Division of Water Resources
APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT (FORM ATC -12-14)
❑ Bid Form for publically bid projects.
G. Construction Sequence Plan
❑ Construction Sequence Plan such that construction activities will not result in overflows or bypasses to waters of the State.
The Plan must not imply that the Contractor is responsible for operation of treatment facilities. List the location of the
Construction Sequence Plan as in the Engineering Plans or in the Engineering Specifications or in both: Not Applicable —
System is already constructed
H. Engineering Calculations
® Per 15A NCAC 02T .0504(c)(3), submit one set of engineering calculations that have been signed, sealed and dated by a North
Carolina Licensed Professional Engineer; the seal, signature and date shall be placed on the cover sheet of the calculations.
For new or expanding facilities and for treatment process modifications that are included in Section 4.C, the calculations shall
include at a minimum:
❑ Demonstration of how peak hour design flow was determined with a justification of the selected peaking factor.
❑ Influent pollutant loading demonstrating how the design influent characteristics in Section 4.6.2 of this form were
determined.
❑ Pollutant loading for each treatment unit demonstrating how the design effluent concentrations in Section 4.6.2 of this form
were determined.
❑ Hydraulic loading for each treatment unit.
❑ Sizing criteria for each treatment unit and associated equipment (blowers, mixers, pumps, etc.)
❑ Total dynamic head (TDH) calculations and system curve analysis for each pump specified that is included in Section 4.C.6.
❑ Buoyancy calculations for all below grade structures.
❑ Supporting documentation that the specified auxiliary power source is capable of powering all essential treatment units.
I. Permits
❑ Provide the following information for each permit and/or certification required for this project:
Permit/Certification
Not
Applicable
Date
Submitted
Date
Approved
Permit/
Certification
Number
If Not Issued Provide
Status and Expected
Issuance Date
Dam Safety
x
Soil Erosion and Sediment Control
x
USCOE /Section 404 Permit
x
Water Quality Certification (401)
x
USCOE /Section 10
x
Stormwater Management Plan
x
CAMA
x
NCDOT Encroachment Agreement
x
Railroad Encroachment Agreement
x
Other:
x
Application for Authorization to Construct Permit (FORM ATC -12-14) Page 4

North Carolina Division of Water Resources
State of North Carolina
Department of Environment and Natural Resources
Division of Water Resources
APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT (FORM ATC -12-14)
J. 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(i) 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:
Application for Authorization to Construct Permit (FORM ATC -12-14) Page 5
Plant Flows
Existing Plant Design
MGD
Current NPDES Permit Limit
MGD
Current Annual Average
(past 12 months)
MGD
For Past 12 Months:
Start Date: month/yr
End Date: month/yr
For Past 24 Months:
Start Date: month/yr
End Date: month/yr
Maximum Month
MGD
MGD
Maximum Day
MGD
MGD
Peak Hour
MGD
MGD
Application for Authorization to Construct Permit (FORM ATC -12-14) Page 5

North Carolina DIVISIOII Of Water Re50UYCCS State of North Carolina
Department of Environment and Natural Resources
Division of Water Resources
APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT (FORM ATC -12-14)
B. WASTEWATER TREATMENT FACILITY DESIGN INFORMATION —COMPLETE FOR NEW OR EXPANDING FACILITIES AND
FOR TREATMENT PROCESS MODIFICATION
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:
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 -12-14) Page 6
Project Basis of Design
Design Influent
Design Influent
Influent
Concentration
Load
Concentration -
(Must be
(Must be
Current Annual
supported by
supported by
Design Effluent
Average (past
Engineering
Engineering
Concentration and/or
NPDES Permit Limits
12 months) if
Calculations
Calculations
Load
(monthly average)
Parameter
Available
[Section 3.H])
[Section 3.H])
Ammonia Nitrogen
mg/L Summer
mg/L Summer
(NH3-N)
mg/L
mg/L
Ib/day
mg/L Winter
mg/L Winter
Biochemical
mg/L Summer
mg/L Summer
Oxygen Demand
mg/L
mg/L
Ib/day
(BODS)
mg/L Winter
mg/L Winter
Fecal Coliform
per 100 mL
per 100 mL
Nitrate + Nitrite
Nitrogen (NO3-N +
mg/L,
mg/L
NO2-N)
Total Kjeldahl
mg/L
Nitrogen
mg/L
mg/L
Total Nitrogen
Ib/year
Ib/year
12.4 mg/L
2.0 mg/L
2.0 mg/L (Quarterly
Total Phosphorus
(measured on
15 mg/L
2.4 Ib/day
Average)
6/29/16)
Ib/year
Ib/year
Total Suspended
mg/L
mg/L
Ib/day
mg/L
mg/L
Solids (TSS)
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 -12-14) Page 6

[l
North Carolina Division of Water Resources State of North Carolina
Department of Environment and Natural Resources
Division of Water Resources
APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT (FORM ATC -12-14)
4. 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: PAX -18 drums will be
stored on a Ultra Spill Deck secondary containment system. Additionally, the PAX -18 drums and chemical feed pump are
located inside a building with a concrete floor.
5. 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(a). the public shall be prohibited from access to the wastewater treatment facilities. Explain how
the design complies with this requirement: The current facility is enclosed by a locked fence.
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):
2. SECONDARY TREATMENT (BIOLOGICAL REACTORS AND CLARIFIERS) (i.e., biological and chemical processes to remove
organics and nutrients)
Application for Authorization to Construct Permit (FORM ATC -12-14)
Page 7
No. of
Plan Sheet
Specification
Calculations
Treatment Unit
TypeL
Size per Unit
:1
Provided?
Units
Reference
Reference
(Yes or No)
Manual Bar Screen
MGD at peak hourly flow
Mechanical Bar
MGD at peak hourly flow
Screen
Grit Removal
MGD at peak hourly flow
Flow Equalization
--
gallons
Primary Clarifier
Circular
ft diameter; ft side
water depth
Primary Clarifier
Rectangular
square feet; ft side
water depth
Other
2. SECONDARY TREATMENT (BIOLOGICAL REACTORS AND CLARIFIERS) (i.e., biological and chemical processes to remove
organics and nutrients)
Application for Authorization to Construct Permit (FORM ATC -12-14)
Page 7

North Carolina Division of Water Resources
State of North Carolina
Department of Environment and Natural Resources
Division of Water Resources
APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT (FORM ATC -12-14)
3. TERTIARY TREATMENT
No. of
Type
Size per Unit
Plan Sheet
Specification
Calculations
Treatment Unit
Units
Type
Size per Unit
Reference
Reference
Provided?
gal/day per bank at
(Yes or No)
Aerobic Zones/
Circular
ft diameter; ft
Tanks
series)
gallons
Anoxic Zones/
Rectangular
square feet; ft
Tanks
(Gas;
gallons
Anaerobic
tablet; liquid)
gallons
Zones/Tanks
(Gas;
square feet
Sequencing Batch
tablet; liquid)
tank/unit
Reactor (SBR)
--
gallons
Membrane
--
gallons
Bioreactor (MBR)
gallons
Secondary Clarifier
Circular
ft diameter; ft
side water depth
Secondary Clarifier
Rectangular
square feet; ft
side water depth
Other
3. TERTIARY TREATMENT
4. DISINFECTION
Treatment Unit
No. of
Type
Size per Unit
Plan Sheet
Specification
Calculations
Treatment Unit
Units
Type
Size per Unit
Reference
Reference
Provided?
gal/day per bank at
(Yes or No)
Tertiary Clarifier
Circular
ft diameter; ft
series)
side water depth
Tertiary Clarifier
Rectangular
square feet; ft
Chlorination
(Gas;
side water depth
Tertiary Filter
tablet; liquid)
square feet
Tertiary Membrane
(Gas;
square feet
Filtration
tablet; liquid)
tank/unit
Post -Treatment
--
gallons
Flow Equalization
Post -Aeration
gallons
Other
4. DISINFECTION
Treatment Unit
No. of
Type
Size per Unit
Plan Sheet
Specification
Calculations
Provided?
Units
Reference
Reference
(Yes or No)
gal/day per bank at
Ultraviolet Light
(Parallel; in
peak hourly flow;
series)
number of banks;
number of lamps/bank
Chlorination
(Gas;
gallons of contact
tablet; liquid)
I tank/unit
Dechlorination
(Gas;
gallons of contact
tablet; liquid)
tank/unit
5. RESIDUALS TREATMENT
Application for Authorization to Construct Permit (FORM ATC -12-14) Page 8

North Carolina Division of Water Resources
State of North Carolina
Department of Environment and Natural Resources
Division of Water Resources
APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT (FORM ATC -12-14)
6. PUMP SYSTEMS (include influent, intermediate, effluent, major recycles, waste sludge, thickened waste sludge and plant
drain pumps)
Location
No. of
Purpose
Type
Plan Sheet
Specification
Calculations
Treatment Unit
Units
Type
Size per Unit
Reference
Reference
Provided?'
290
3
5
(Yes or No)
Gravity Thickening
square feet; ft side
Tank
water depth
Mechanical
Thickening/
dry Ib/hour
Dewatering
Aerobic Digestion
gallons
Anaerobic
gallons
Digestion
Composting
dry Ib/hour
Drying
dry Ib/hour
Other
6. PUMP SYSTEMS (include influent, intermediate, effluent, major recycles, waste sludge, thickened waste sludge and plant
drain pumps)
Location
No. of
Pumps
Purpose
Type
Capacity of
each pump
Plan Sheet
Reference
Specification
Reference
GPD
TDH
Electrical Building
2
Chemical drip
Chem -Tech XP Series,
Model XPO04LAHX
4
290
3
5
7. MIXERS
Location
No. of
Mixers
Purpose Type
Power of
each MP ixer
plan Sheet
Reference
Specification
Reference
Application for Authorization to Construct Permit (FORM ATC -12-14) Page 9

North Carolina Division of Water Resources State of North Carolina
Department of Environment and Natural Resources
Division of Water Resources
APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT (FORM ATC -12-14)
B. BLOWERS
Location
No. of
Blowers
purpose
Type
Capacity of
each Blower
(CFM)
plan Sheet
Reference
Specification
Reference
Treatment/Storage
Design? If "No", identify
Unit
Setback Waivers in Item D.2
Below
Any habitable residence or place of assembly under separate
100 ft
® Yes
❑ No
ownership or not to be maintained as part of the project site
Any private or public water supply source
100 ft
® Yes
❑ No
Surface waters (streams — intermittent and perennial, perennial
50 ft
® Yes
❑ No
waterbodies, and wetlands)
Any well with exception of monitoring wells
100 ft
® Yes
❑ No
Any property line
50 ft
® Yes
9. ODOR CONTROL
Location
No. of
Units
purpose
Type
Plan Sheet
Reference
Specification
Reference
Setback Parameter
Treatment/Storage
Design? If "No", identify
Unit
Setback Waivers in Item D.2
Below
Any habitable residence or place of assembly under separate
100 ft
® Yes
❑ No
ownership or not to be maintained as part of the project site
Any private or public water supply source
D. SETBACKS —COMPLETE FOR NEW WASTEWATER TREATMENT STRUCTURES
1. The minimum distance for each setback parameter to the wastewater treatment/storage units per 15A NCAC 02T .0506(b)
are as follows:
2. Have any setback waivers been obtained per 15A NCAC 02T .0506(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. If
no, provide an explanation:
Application for Authorization to Construct Permit (FORM ATC -12-14) Page 10
Minimum Distance
Is Minimum Distance
Required from Nearest
Requirement met by the
Setback Parameter
Treatment/Storage
Design? If "No", identify
Unit
Setback Waivers in Item D.2
Below
Any habitable residence or place of assembly under separate
100 ft
® Yes
❑ No
ownership or not to be maintained as part of the project site
Any private or public water supply source
100 ft
® Yes
❑ No
Surface waters (streams — intermittent and perennial, perennial
50 ft
® Yes
❑ No
waterbodies, and wetlands)
Any well with exception of monitoring wells
100 ft
® Yes
❑ No
Any property line
50 ft
® Yes
❑ No
2. Have any setback waivers been obtained per 15A NCAC 02T .0506(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. If
no, provide an explanation:
Application for Authorization to Construct Permit (FORM ATC -12-14) Page 10

North Carolina Division of Water Resources State of North Carolina
Department of Environment and Natural Resources
Division of Water Resources
APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT (FORM ATC -12-14)
SECTION 5: APPLICATION CERTIFICATION BY PROFESSIONAL ENGINEER
Professional Engineer's Certification per 15A NCAC 02T.0105:
I, Scott S. Huismann, attest that this application package for an Authorization to Construct
(Typed Name of Professional Engineer)
for the Autumn Forest WWTP
(Facility and Project Name)
was prepared under my direct supervisory control and to the best of my knowledge is accurate, complete and consistent
with the information supplied in the engineering plans, specifications, calculations, and all other supporting
documentation for this project. I further attest that to the best of my knowledge the proposed design has been
prepared in accordance with all applicable regulations and statutes, 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, and this Authorization to Construct Permit Application, except as
provided for and explained in Section 4.13.1 of this Application. I understand that the Division of Water Resources'
issuance of the Authorization to Construct Permit may be based solely upon this Certification and that the Division may
waive the technical review of the plans, specifications, calculations and other supporting documentation provided in this
application package. I further understand that the application package may be subject to a future audit by the Division.
Although certain portions of this submittal package may have been prepared, signed and sealed by other professionals
licensed in North Carolina, inclusion of these materials under my signature and seal signifies that I have reviewed the
materials and have determined that the materials are consistent with the project design.
I understand that in accordance with General Statutes 143-215.6A and 143-215.66, any person who knowingly makes
any false statement, representation, or certification in any application package shall be guilty of a Class 2 misdemeanor,
which may include a fine not to exceed $10,000, as well as civil penalties up to $25,000 per violation.
North Carolina Professional Engineer's seal with written signature placed over or adjacent to the seal and dated:
Z <— --� re! �; �
�H CARo
zoe' F ss o•• 4, ,
E ! �
SEAL
23779
(POG •.c�NG i NEEP'
Application for Authorization to Construct Permit (FORM ATC -12-14) Page 11

III
State of North Carolina
North Carolina Division of Water Resources Department of Environment and Natural Resources
Division of Water Resources
APPLICATION FOR AUTHORIZATION TO CONSTRUCT PERMIT (FORM ATC -12-14)
SECTION 6: APPLICATION CERTIFICATION BY APPLICANT
�. Applicant's Certification per 15A NCAC 02T .0106(b):
0
I, Andrew Luter, Chief Investment Officer, attest that this application package for an Authorization to Construct
(Typed Name of Signature Authority and Title)
for the Autumn Forest WWTP
(Facility and Project Name)
has been reviewed by me and is accurate and complete to the best of my knowledge. I also understand that if all
required parts of this application package are not completed and that if all required supporting information and
attachments are not included, this application package will be returned to me as incomplete. I further certify that in
accordance with 15A NCAC 02T .0120(b), the Applicant or any affiliate has not been convicted of environmental crimes,
has not abandoned a wastewater facility without proper closure, does not have an outstanding civil penalty where all
appeals have been abandoned or exhausted, are compliant with any active compliance schedule, and does not have any
overdue annual fees.
I understand that the Division of Water Resources' issuance of the Authorization to Construct Permit may be based
solely upon acceptance of the Licensed Professional Engineer's Certification contained in Section 5, and that the Division
may waive the technical review of the plans, specifications, calculations and other supporting documentation provided
in this application package. I further understand that the application package may be subject to a future audit.
I understand that in accordance with General Statutes 143-215.6A and 143-215.66 any person who knowingly makes
any false statement, representation, or certification in any application package shall be guilty of a Class 2 misdemeanor,
which may include a fine not to exceed $10,000, as well as civil penalties up to $25,000 per violation.
Signature: Date:
THE COMPLETED APPLICATION AND SUPPORTING INFORMATION SHALL BE SUBMITTED TO:
NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER RESOURCES/NPDES
By U.S. Postal Service By Courier/Special Delivery:
1617 MAIL SERVICE CENTER 512 N. SALISBURY STREET, 9TH FLOOR
RALEIGH, NORTH CAROLINA 27699-1617 RALEIGH, NORTH CAROLINA 27604
TELEPHONE NUMBER: [phone]
Application for Authorization to Construct Permit (FORM ATC -12-14) Page 12

1
Permit NCO022691
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provision of North Carolina General Statute 143-215.1, other lawful
standards and regulations promulgated and adopted by the North Carolina Environmental
Management Commission, and the Federal Water Pollution Control Act, as amended,
YES AF Utilities EXP, LLC
is hereby authorized to discharge wastewater from a facility located at the
Autumn Forest WWTP
3700 Autumn Forest Drive
Guilford County
to receiving waters designated as an unnamed tributary to Reedy Fork Creek my
subbasin 03-06-02 of the Cape Fear River Basin in accordance with effluent
limitations, monitoring requirements, and other conditions set forth in Parts I, II, III
and IV hereof.
This permit shall become effective October 24, 2012.
This permit and authorization to discharge'shall expire at midnight on June 30, 2016.
Signed this day October 24, 2012
f 9f'Ch4" // V46vt
arles Wakild, P.E., Director
Division of Water Quality
By Authority of the Environmental Management Commission

Permit NCO022691
SUPPLEMENT TO PERMIT COVER SHEET
All previous NPDES Permits issued to this facility, whether for operation or discharge are hereby revoked. As of
this permit issuance, any previously issued permit bearing this number is no longer effective. Therefore, the
exclusive authority to operate and discharge from this facility arises under the permit conditions, requirements,
. terms, and provisions included herein
YES AF Utilities EXP, LLC is hereby authorized to:
Continue to operate an existing 0.082 MGD extended -aeration wastewater
treatment facility with the following components:
♦ Bar screen
♦ Flow splitter
♦ Dual aeration basins
♦ Dual clarifiers
♦ Dual effluent chlorination with chlorine contact chamber
♦ Dechlorination
♦ Sludge digester
♦ Equalization Basin
This facility is located at 3700 Autumn Forest Drive at the Autumn Forest MHC
WWTP in' Guilford County.
2. Discharge from said treatment works at the location specified on the attached
map into an unnamed tributary to Reedy Fork Creek, currently classified_ WS --V
NSW waters in hydrologic unit 03020201 of the Cape Fear River Basin.

Hydrologic Unit: 03020201 N C002269! Facility
Latitude: 36°11'07"
Longitude: 79°43'17" Autumn Forest MHC Location
Stream Class: WS-V NSW WWTP
Subbasin:'03-06-02
Receiving Stream: UT Reedy Fork Creek Guilford County
USGS Quad: Browns Summit, N.C. Zid I I Map not to scale

Permit NCO022691
A. (1) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
During the period beginning on the effective date of this permit and lasting until expiration, the permittee is
authorized to discharge from outfall 001. Such discharges shall be limited and monitored by the Permittee as
specified below:
PARAMETER
LIMITS
; .:'A NITORING:REQUIREMENTS
[PCS Code]
MonfltlyAverage.
Dail 'Maximum
.;Measurement'.:
:Sample':.
Sample
;Frequelicy
TYpe:
Lo C.
Flow
0.082 MGD
Continuous
Recording
Influent or
50050
Effluent
80D, 5 -day (20°C)
7.0 mglL
10.5 mglL
Weekly
Composite
Effluent
C0310
Total Suspended Solids
30.0 mg1L
45.0 mglL
Weekly
Composite
Effluent
C0530
NH3 as N (April 1- October 31)
2.0 mglL
10.0 mg1L
Weekly
Composite
Effluent
CO610
NH3 as N (November 1- March 31)
4.0 mglL
20.0 mglL
Weekly
Composite
Effluent
CO610
Dissolved Oxygen
Daily average > 6.0 mg.1L
.Weekly
Grab
Effluent,
[C03001
U & D
Fecal Coliform (geometric mean)
200 / 100 ml
4001100 ml
Weekly
Grab
Effluent
31616
Total Residual Chlorine2
17 4L
2/Week
Grab
Effluent
50060
Temperature (°C)
Weekly
Grab
Effluent,
[000`101
U & D
Total Nitrogen (NO2+NO3+TKN)
Quarterly
Composite
Effluent
C0600
Total Phosphorus3
2.0 mglL Quarterly Average
Weekly
Composite
Effluent
C0665
pH.
> 6.0 and < 9.0 standard units
Weekly
Grab
Effluent
00400
1—
Footnotes:
1. U: at least 50 feet upstream from the outfall. D. at least 100 feet downstream from the outfall.
2. The Permittee shall report all effluent TRC values reported by a NC -certified laboratory [including field -
certified]. Effluent values below 50 µg/L will be treated as zero for compliance purposes.
3. Compliance shall be based on a quarterly average of weekly samples.
There shall be no discharge of floating solids or visible foam in other than trace amounts.
A. (2) NUTRIENT REOPENER CONDITION
Pursuant to N.C. General Statutes Section 143-215.1 and the implementing rules found in
the North Carolina Administrative Code at 15A NCAC 2H.0112- (b) (1) and 2H.0114 (a) and
Part II sections B-12 and B-13 of this permit, the Director may reopen this permit to
require supplemental nutrient monitoring of the discharge. The purpose of the additional
monitoring will be to support water quality modeling efforts within the Cape Fear River
Basin and shall be consistent with a monitoring plan developed jointly by the Division and
affected stakeholders. In addition, the results of water quality modeling may require that
limits for Total Nitrogen and Total Phosphorus be imposed in this permit upon renewal. .

CHEMICAL TREATMENT FOR PHOSPHOROUS REMOVAL DESIGN
AUTUMN FOREST WWTP
3700 AUTUMN FOREST DR.
BROWNS SUMMIT, INC 27214
YES AF UTILITIES EXP, LLC
2401 15TH ST., SUITE 200
DENVER, COLORADO 80202 ' • } ,I. 1
r �' I _`•
DECEMBER 2016
a
1 FINAL DRAWING
j PROJECT sva
-f
LOCATION
FOR REVIEW PURPOSES ONLY - NOT RELEASED FOR CONSTRUCTION
l SHEET INDEX NUMBER DESCRIPTION 4r td
1 COVER SHEET
51 2 OVERALL SITE PLAN & WWTP LAYOUT
`. 3 PROPOSED LAYOUT `
4 FLOW DIAGRAM
V - 5 TECHNICAL PRODUCT INFORMATION
1. t.
VICINITY MAP GENERALLOCATION MAP
NOT TO SCALE NOT TO SCALE
tti CARO
PROJECT SHEET TIiIE DRAWING N0.
• AUTUMN FOREST WWTP
CHECK BY KS - SEAL 3700 AUTUMN FOREST DRIVE
DRAWN BY SP Z3779 j BROWNS SUMMIT, NC 27214
APESDATE 12-1-16 12/27/16
N .. = OWNER COVER SHEET 1
SCALE AS SHOWN Cp' �NOINEEQ'` • 2
� �" �° --CAI N0. 510441-001 �'g HV\S�P YES AF UTILITIES, LLC
smcv 2401 15TH STREET, SUITE 200
U -SE c PRJ No. 510441-001 ��� DENVER, COLORADO 80202

IIIIC
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PROJECT
AREA :f •+ X4,
OVERALL SITE PLAN
OD
APEX
,;.,; ;,1✓' _ DIGESTOR
'*. WASTE ACTIVATED
SLUDGE LINE
FINAL
t Y.: CLARIFIER
CHLORINATION EQUALIZATION
.�.�, CHAMBER TANK
DECHLORINATION
INACTIVE RETURN ACTIVATED
>? c' fi•
CHLORINATION AERATION SLUDGE LINE
.I CHAMBER BASIN
L1 •r INACTIVE
AERATION
PI INACTIVE BASIN SHED WITH
�frt BLOWERS
DIGESTOR
x' INACTIVE WASTE FLOW SPLITTER
ACTIVATED BOX
' SLUDGE LINE INACTIVE FINAL
CLARIFIER ELECTRICAL
t� BUILDING
RETURN INACTIVE
ACTIVATED SLUDGE
�'•� LINE
o 11
® WASTEWATER TREATMENT PLANT
1"=20'
:K BY KS
rQ '• AUTUMN FOREST WWTP
SEAL 3700 AUTUMN FOREST DRIVE
OVERALL SITE
IN By SP
23779 BROWNS SUMMIT, NC 27214
PLAN
12-1—I6
Ni 11/27/16 •'g OWNER
ONEP2
O SINE,.
WWTP
2
E AS SHOWN
NO. 510441-001
YES AF UTILRIES, LLC
�`� 2401 15TH STREET, SUITE 200
DENVER, COLORADO 80202
LAYOUT
N0. 510441-001

AERATION$
BASIN
z
---------------
1" SCH.40 PVC
` ENCASING TUBING
----- UNDERGROUND
ABOVEGROUND
2 -MANUAL CONTROL CHEM -TECH XP
SERIES PUMP MODEL #XPO04LAHX
3 15 -GALLON DRUMS
SINGLE PHASE, 115 VOLTS, 2.4 AMPS
OF ALUMINUM CHLORIDE,
NOMINAL OUTPUT: 4 GPD
MAXIMUM PRESSURE: 125 PSI
PAX -18 (APPROX. 1
MONTH SUPPLY)
110V/20AMP
3 15 -GALLON DRUMS OF
OUTLET
ALUMINUM CHLORIDE, PAX -18
(APPROX. 1 MONTH SUPPLY)
2 -MANUAL CONTROL CHEM -TECH XP
SERIES PUMP MODEL #XPO04LAHX
SINGLE PHASE, 115 VOLTS, 2.4 AMPS
NOMINAL OUTPUT: 4 GPD
7DISCHARGE
MAXIMUM PRESSURE: 125 PSI
ELECTRICAL
INACTIVE
BUILDING, GRAY
AERATION
I
WOOD FRAMEBASIN
(.
BUILDING WITH
FEET)
52" 1
CONCRETE FLOOR
PE DISCHARGE
TUBING }" OD
(APPROX. 25
FEET)
52"X56J"X5j"
ULTRA -SPILL DECK
4 DRUM, 99 -GALLON
CAPACITY
ELECTRICAL BUILDING
GRAY WOOD
1
FRAME BUILDING
AERATION
�2X.8-X5J"
WITH CONCRETE
FLOOR
BASIN
1" SCH.40 PVC
ENCASING TUBING
ULTRA -SPILL DECK
1a Fr
-
L RL GALLON
CAPACITY
PLAN VIEW
PROFILE VIEW
NOT TO SCALE
NOT TO SCALE
CA
®�
j�••..1.
PROJECT
SHEEP TITLE DRAWING N0.
C9
CHECK T' KSDRA_SPL
AUTUMN FOREST WHIP
3700 AUTUMN FOREST DRIVE
r 9
��L� DATE 12-1-1/16.=
L-0
BROWNS SUMMIT, NC 27214
PLAYOUTD��..
F.meq. SCALE AS SHO£QrCAD
OWNER
AF UTILITIES, LLC
N0. 510441-l='PYES
U152401
15TH STREET, SUITE 200
UCEa c
PRJ NO. 510441 -
DENVER, COLORA00 80202

o
MANUAL CONTROL CHEM -TECH
15 -GALLON DRUM OF XP SERIES PUMP
PAX -18 WITH MODEL $XPO04LAHX AERATION BASIN
ULTRA -SPILL DECK SINGLE PHASE, 115 VOLTS, 2.4 AMPS
NOMINAL OUTPUT: 4 GDP
MAXIMUM PRESSURE: 125 PSI
FLOW DIAGRAM
NOT TO SCALE
Al FCARO
2•; �Q O'•., ,9 PROJECT SHEET TRLE DR WING N0.
: QP AUTUMN FOREST WWTP
CHECK BY KS ASEAL 3700 AUTUMN FOREST DRIVE
/^�^'J DRAWN DY SP 23779 BROWNS SUMMIT, NC 27214
APEXEX DATE 12-1-16 �,• 11/27/16 .•= WNER FLOW
SCALE AS SHOWN pp'F1/27/1 A'pc' DIAGRAM
IJM " "a' "^""� °C !1` YES AF UTILITIES, LLC
106t9Gw,btte�NC 80269 2a cno No. 510441-001 S. U75 2401 15TH STREET, SUITE 200
ucDs[i C-73 PRJ NO. 510441-001 DENVER, COLORADO 80202

F•'v
Kem,ra
c J^+D
KEMIRA PAX -18
PoyJNmhum CNMEe ,5 .
�® CHECK BY KS
DRAWN BY SP
�
� CA DATE 12-1-76
. .. _ __ SCALE AS SHOWN
N0. 510441-001
uas uaectiaiadars ag54Emm�m
m
UI sp11
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... ........,. _. �.......,..w....
4=' Dlo-a5p9o.snala6lnsy—
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------- 4r
SEAL
AUTUMN FOREST WWTP
3700 AUTUMN FOREST DRIVE
23779
BROWNS SUMMIT, NC 27214
2/227/17/16 ?= OwNER
TECHNICAL
yQINEEP,.+P2
PRODUCT
YES AF UTILITIES, LLC
2401 15TH STREET, SUITE 200
INFORMATION
DENVER, COLORADO 80202

R�\
APEX
ENGINEERING CALCULATIONS
Application for Authorization to Construct Permit
NPDES Permit No. NCO022691
Autumn Forest MHC Wastewater Treatment Plant
3700 Autumn Forest Drive
Browns Summit, Guilford County, North Carolina
Apex Job No. 510441-004
October 2016
Prepared for:
Yes AF Utilities EXP, LLC
190016 th Street, Suite 950
Denver, CO 80202
Reviewed by:
Scott S. Huismann, P.E.
Director
NC License No. 23779
�N CARO
=0 ssioti 29
oFE /
SEAL
23779
12/27/16
NO0 •.FNG I Ne
Apex Companies, LLC • 10610 Metromont Parkway, Suite 206 • Charlotte, NC 28269 • T 704.799.6390 • F 704.799.6395 • apexcos.com

Authorization to Construct— Chemical Calculations October XX, 2016
Autumn Forest MHC Wastewater Treatment Plant Page 1
Design Criteria:
Treatment Plant Permitted Flow: 82,000 gpd
Average Daily Flow: 19,000 gpd (Based on flow data from 2013 through 2015)
Maximum daily flow: 33,000 gpd (Based on flow data from 2013 through 2015)
Influent Total Phosphorus Concentration: 12.4 mg/L (Based on sample collected on 6/29/2016)
Typical Domestic Sewage Phosphorus Concentrations: 6 mg/L - 20 mg/L (Lindeburg, 2015)
Design Influent Phosphorus Concentration: 15 mg/L
Total Phosphorus effluent limit per NPDES permit: 2.0 mg/L (quarterly average)
Stoichiometric Dose Calculations
The aluminum ion in PAX -18 combines with orthophosphate ions to form insoluble aluminum
phosphate as follows:
A13+ + P043- -� AlPO4
Given:
Molecular Weight of AI = 27
Molecular Weight of P = 31
PAX -18 = 9.0% Al by weight
lb
PPAX18 = 11.42 gall
Weight Ratio of Al to P in the above precipitation reaction:
27 g Al 1 mol P _ 0.87
Al: P = 1 mol Al x 319 P - 1 or 0.87:1
Phosphorus Influent Load:
Mg gall L lb_ lb lb
15 L x 19,000 da x 3.785 all x 2.4 da _ 880
Y 9 453,590 m 9 Y Year
Target Phosphorus Removal:
mg mg gall L lb _ lb P
(15 L -2.0 L) x 19,000 day x 3.785 gall x 453,590 mg 2.1 day
Target Stoichiometric PAX -18 Dose:
lb P lb Al lb PAX18 gall PAX18 _ gall PAX18
2.1 day x 0.87 lb P x 0.09 lb Al x 11.42 lbs PAX18 1.8 day
Jar Test Dose Calculations:
On August 17, 2016, Mr. Allen Daniels of Water Guard Inc. conducted jar tests on raw water
collected from the Autumn Forest WWTP to compare two formulations of aluminum chloride -
1
/APEX

Authorization to Construct— Chemical Calculations
Autumn Forest MHC Wastewater Treatment Plant
October XX, 2016
Page 2
PAX -18 and Delpac 2020. The jar test results showed that lower doses of PAX -18 perform
better than higher doses of Delpac 2020.
Optimal PAX -18 dose (based on 8/17/16 jar test): 150 ppm
Target PAX -18 Dose:
lblb PAX18
150 ppm PAX18 x 0.019 MGD x 8.349a1 _ 24 day
lb PAX18 x gall _ gall PAX18
24 day 11.42 lb — 2.1 day
Based on the stoichiometric calculations and jar test results, a target PAX -18 dose of 2.1 gpd
has been selected. The feed rate may be adjusted based on fluctuations in the flow rate
through the plant and influent phosphorus concentrations.
Selected Chemical Feed pump is Manual Control Chem -Tech XP Series Peristaltic Pump Model
# XPO04LAHX with a nominal output of 4 gpd.
A
APEX