NC0089541_Permit Issuance_20150908

Pat McCrory
Governor
NCDENR
North Carolina Department of Environment and Natural Resources
September 8, 2015
Mr. Michael Lancaster, Operations Manager
Ashton Lewis Lumber Company
96 Lewis Mill Road
Gatesville, North Carolina 27938
Dear Mr. Lancaster:
Donald R. van der Vaart
Secretary
Subject: Issuance of NPDES Permit
Permit No. NCO089541
Ashton Lewis Lumber Company
Gates County
Facility Class PCNC
Division personnel have reviewed and approved your application of the subject permit. Accordingly, we
are forwarding the attached NPDES discharge permit. This permit is issued pursuant to the requirements
of North Carolina General Statute 143-215.1 and Memorandum of Agreement between North Carolina
and the U.S. Environmental Protection Agency dated October 15, 2007 (or as subsequently amended).
No changes were made to the draft permit sent to you on May 20, 2015. The final permit authorizes
the Ashton ' Lewis Lumber Company to discharge wastewater from wet deck log storage site to an
unnamed tributary to the Bennetts Creek, a class C; NSW water in the Chowan River Basin.
The Permittee provided comments about the on -site ORC. After conferring with NC Operators
Certification Program and Washington Regional Office, the facility classification was changed to physical
chemical not classified (PCNC) and the facility is not required to have an ORC or a back-up.
As identified previously, the new permit contains the following significant limitations,
monitoring and reporting requirements:
• The requirement to begin reporting discharge monitoring data electronically using the NC DWR's
Electronic Discharge Monitoring Report (eDMR) internet application has been added to your NPDES
permit. [See Special Condition A.(4.)]
For information on eDMR, registering for eDMR and obtaining an eDMR user account, please visit
the following web page: http://portal.ncdenr.or. web/wq/admin/bog/ipu/edmr.
For information on EPA's proposed NPDES Electronic Reporting Rule, please visit the following
web site: httu://www2.eDa.gov/compliance/proposed-npdes-electronic-reporting-rule.
• Through discussion with your design engineer Mr. Sean Coury, the Division has decided to permit
two outfalls (Outfall 001 and Outfall 002) that discharge wastewater from wet deck process
(including stormwater) and boiler blowdown, respectively.
1617 Mail Service Center, Raleigh, North Carolina 27699-1617
Phone: [phone] Internet: www.ncdenr.gov
An Equal opportunity 1 Affirmative Action Employer — Made in part by recycled paper

• Outfall 001 has numeric and/or narrative limitations on pH, total suspended solids (TSS), debris,
floating solids/visible foam with weekly monitoring of flow, pH, oil and grease, and quarterly
monitoring of total nitrogen and total phosphorus.
• Outfall 002 has numeric and/or narrative limitations on pH, floating solids/foam with quarterly
monitoring of flow, temperature, pH, and chemical oxygen demand (COD). Note the upstream and
downstream monitoring requirement of temperature is not necessary if the discharge is to a receiving
stream that does not contain any flowing water at the time of discharge.
• The Permittee shall obtain approval from the Division's Aquatic Toxicology Branch prior to the use
of any biocide (not previously approved by the Division) in the effluent discharged under this permit.
Approval for use of any biocide not previously approved should be requested at least 90 days in
advance of any planned usage. Please complete Biocide Form 101 Worksheet at the following link:
littp://portal.ncdenr.org/web/wq/swp/ps/nodes/forms.
If any parts, measurement frequencies or sampling requirements contained in this permit are unacceptable
to you, you have the right to an adjudicatory hearing upon written request within thirty (30) days
following receipt of this letter. This request must be in the form of a written petition, conforming to
Chapter 150B of the North Carolina General Statutes, and filed with the Office of Administrative
Hearings (6714 Mail Service Center, Raleigh, North Carolina 27699-6714). Unless such demand is made,
this decision shall be final and binding.
Please note that this permit is not transferable except after notice to the Division. The Division may
require modification or revocation and reissuance of the permit. This permit does not affect the legal
requirements to obtain other permits which may be required by the Division of Water Resources or any
other Federal, State, or Local government permits that may be required.
If you have questions concerning this permit, please contact Yang Song by e-mail
([e-mail]) or phone at [phone].
Sincerely,
Jay Zimmerman, P.G.
Director, Division of Water Resources
Enclosure: NPDES Permit NC0089541
cc: NPDES Unit
Central Files
Washington Regional Office / Water Quality Program
e-copy:
Susan Meadows, Aquatic Toxicity Branch
Steve Reid, Wastewater Operator Certification & Training
Sean Coury, P.E., Consulting Engineer, Coury Science & Engineering, PLLC

Permit NCO089541
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER RESOURCES
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,
Ashton Lewis Lumber Company
is hereby authorized to discharge wastewater from a facility located at the
Wet Deck Log Storage site
96 Lewis Mill Road
Gatesville, NC
Gates County
to receiving waters designated as an unnamed tributary to the Bennetts Creek in the Chowan River
Basin in accordance with effluent limitations, monitoring requirements, and other conditions set forth
in Parts I, II, and III hereof.
The permit shall become effective ............................... October 1, 2015.
This permit and the authorization to discharge shall expire at midnight on September 30, 2020.
Signed this day .............................................. September 8, 2015.
. Jay Zimmerman, P.G.
r Director, Division of Water Resources
By Authority of the Environmental Management Commission
Page 1. of 6

r
Permit NCO089541
SUPPLEMENT TO PERMIT COVER SHEET
Ashton Lewis Lumber Company
is hereby authorized to:
1. Discharge wet -decking wastewater runoff and stormwater at Outfall 001, and boiler blowdown
wastewater at Outfall 002.
Both outfalls are located at the wet deck log storage site. This facility is located in Gatesville, NC at
96 Lewis Mill Road in Gates County; and
2. Discharge at the locations specified on the attached map into an unnamed tributary to the Bennetts
Creek, classified C; NSW waters in the Chowan River Basin.
Page 2of6

Permit NCO089541
Part I
A. (L) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS — Outfall 001
[15A NCAC 02B .0400 et seq., 02B .0500 et seq.]
a. During the period beginning on the effective date of this permit and lasting until expiration, the Permittee is
authorized to discharge wet -decking wastewater and stormwater from Outfall 001. Such discharges shall
be limited and monitored by the Permittee as specified below:
EFFLUENT
CHARACTERISTICS
LIMITATIONS
MONITORING REQUIREMENTS
Monthly
Average
Daily
Maximum
Measurement
Frequency
Sample Type
Sample
Location
Flow 2 {MGD)
Weekly
Instantaneous
Effluent
Total Suspended Solids 3
30 mg/L
45 mg/L
Weekly
Grab
Effluent
s
PH
Not less than 6.0 S.U. nor
greaterWeekly
than 9.0 S.U.
Grab
Effluent
Oil and Grease 3(mg/L)
Weekly
Grab
Effluent
Total Nitrogen (TN) 3'4 (mg/L)
Monitor & Report
Quarterly
Grab
Effluent
Total Phosphorus (TP) 3 (mg/L)
Monitor & Report
Quarterly
Grab
Effluent
Footnotes:
1. No later than 270 days from the effective date of this permit, begin submitting discharge monitoring reports
electronically using NC DWR's eDMR application system. See Special Condition A.(4.).
2. If no discharge during the month, report "No Discharge" on Monthly eDMRs.
3. Based on the episodic discharge condition, it is recommended that sampling for parameters shall coincide with
flow measurement.
4. For a given wastewater sample, TN = TKN + (NO3-N + NO2-N), where TN is Total Nitrogen, TKN is Total
Kjeldahl Nitrogen, and (NO3-N + NO2-N) are Nitrate and Nitrite Nitrogen, respectively.
b. There shall be no debris discharged from the facility.
c. There shall be no discharge of floating solids or visible foam in other than trace amounts.
d. There shall be no discharge of process wastewater pollutants associated with sawmill operations.
Page 3 of 6

Permit NCO089541
A. (2.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS — Outfall 002
[15A NCAC 02B .0400 et seq., 02B .0500 et seq.]
a. During the period beginning on the effective date of this permit and lasting until expiration, the Permittee is
authorized to discharge boiler blowdown wastewater from Gutfall 002. Such discharges shall be limited
and monitored) by the Permittee as specified below:
EFFLUENT
LIMITATIONS
MONITORING REQUIREMENTS
Monthly
Daily
Measurement
Sample
Sample Location
CHAR.A.CTERISTICS
Averse
Maximum
Frequency
Type
Flow MGD)
Quarterly
Estimate
Effluent
Temperature 2(°C)
Quarterly
Grab
Effluent
U stream & Downstream
pH
Not less than 6.0 S.U. nor
Quarterly
Grab
Effluent
eater than 9.0 S.U.
Chemical Oxygen
Demand (COD) (mg/L)
Quarterly
Grab
Effluent
Footnotes:
1. No later than 270 days from the effective date of this permit, begin submitting discharge monitoring reports
electronically using NC DWR's eDMR application system. See Special Condition A.(4.).
2. Effluent temperature will be regulated so that the temperature of the receiving stream does not increase more
than: 2.8°C above the natural water temperature. The Permittee shall demonstrate compliance with the effluent
temperature limitations by monitoring the temperature of the receiving stream upstream and downstream of the
discharge outfall. The Division should be consulted in selecting representative upstream/downstream sampling
locations. Upstream and downstream monitoring is not necessary if the discharge is to a receivinLy
stream that does not contain any flowing water at the time of discharge.
b. All boiler blowdown water sample locations shall provide representative samples of the discharge and
require sampling prior to discharge commingling with any other waters or substances, such as stormwater or
surface water to enable characterization of a pollutant of concern.
c. There shall be no discharge of floating solids or visible foam in other than trace amount.
Page 4 of 6

Permit NCO089541
A. (3.) BIOCIDE CONDITION
[G.S. 143-2152143-215.1(b)]
a. There shall be no chromium, zinc or copper added to the treatment system except as pre -approved
additives to biocidal compounds.
b. The Permittee shall obtain approval from the Division's Aquatic Toxicology Branch prior to the use of
any biocide (not previously approved by the Division) in the effluent discharged under this permit.
Approval for use of any biocide not previously approved should be requested at least 90 days in advance
of any planned usage.
c. Contact the Aquatic Toxicology Branch for detailed instructions on requesting approval of biocides:
NC DENR / DWR / Aquatic Toxicology Branch
1623 Mail Service Center
Raleigh, North Carolina27699-1623
A. (4.) ELECTRONIC REPORTING OF DISCHARGE MONITORING REPORTS
[G. S. 143-215.1(b)]
Proposed federal regulations require electronic submittal of all discharge monitoring reports (DMRs) and specify
that, if a state does not establish a system to receive such submittals, then permittees must submit DMRs
electronically to the Environmental Protection Agency (EPA). The Division anticipates that these regulations will
be adopted and is beginning implementation in late 2013.
NOTE: This special condition supplements or supersedes the following sections within Part H of this permit
(Standard Conditions for NPDES Permits):
Section B. (11.) Signatory Requirements
Section D. (2.) Reporting
Section D. (6.) Records Retention
Section E. (5.) Monitoring Reports
1. Reporting [Supersedes Section D. (2.) and Section E. (5.) (a)l
Beginning no later than 270 days from the effective date of this permit, the permittee shall begin reporting
discharge monitoring data electronically using the NC DWR's Electronic Discharge Monitoring Report (eDMR)
internet application.
Monitoring results obtained during the previous month(s) shall be summarized for each month and submitted
electronically using eDMR. The eDMR system allows permitted facilities to enter monitoring data and submit
DMRs electronically using the internet. Until such time that the state's eDMR application is compliant with
.EPA's Cross -Media Electronic Reporting Regulation (CROMERR), permittees will be required to submit all
discharge monitoring data to the state electronically using eDMR and will be required to complete the eDMR
submission by printing, signing, and submitting one signed original and a copy of the computer printed eDMR to
the following address:
NC DENR / DWR / Information Processing Unit
ATTENTION: Central Files / eDMR
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
If a permittee is unable to use the eDMR system due to a demonstrated hardship or due to the facility being
physically located in an area where less than 10 percent of the households have broadband access, then a
temporary waiver from the NPDES electronic reporting requirements may be granted and discharge monitoring
Page 5 of 6

Permit NC008954 f
data may be submitted on paper DMR forms (MR 1, 1.1, 2, 3) or alternative forms approved by the Director.
Duplicate signed copies shall be submitted to the mailing address above.
Requests for temporary waivers from the NPDES electronic reporting requirements must be submitted in writing
to the Division for written approval at least sixty (60) days prior to the date the facility would be required under
this permit to begin using eDMR. Temporary waivers shall be valid for twelve (12) months and shall thereupon
expire. At such time, DMRs shall be submitted electronically to the Division unless the permittee re -applies for
and is granted a new temporary waiver by the Division.
Information on eDMR and application for a temporary waiver from the NPDES electronic reporting requirements
is found on the following web page:
http://portal.ncdenr.org/web/wg/admin/bodi u/p edmr
Regardless of the submission method, the first DMR is due on the last day of the month following the issuance of
the permit or in the case of a new facility, on the last day of the month following the commencement of discharge.
2. Signatory Requirements [Supplements Section B. (11.) (b) and supersedes Section B. (11.) (d)l
All eDMRs submitted to the permit issuing authority shall be signed by a person described in Part H, Section B.
(I 1.)(a) or by a duly authorized representative of that person as described in Part H, Section B. (I 1.)(b). A person,
and not a position, must be delegated signatory authority for eDMR reporting purposes.
For eDMR submissions, the person signing and submitting the DMR must obtain an eDMR user account and
login credentials to access the eDMR system. For more information on North Carolina's eDMR system,
registering for eDMR and obtaining an eDMR user account, please visit the following web page:
http://portal.ncdenr.or web/wg/admin/boglipu/edmr
Certification. Any person submitting an electronic DMR using the state's eDMR system shall make the following
certification [40 CFR 122.22]. NO OTHER STATEMENTS OF CERTIFICATION WILL BE ACCEPTED:
V certify, under penalty of law, that this document and all attachments were prepared under my direction or
supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate
the information submitted. Based on my inquiry of the person or persons who- manage the system, or those
persons directly responsible for gathering the information, the information submitted is, to the best of my
knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting
false information, including the possibility of fines and imprisonment for knowing violations. "
3. Records Retention [Supplements Section D. (6.)l
The permittee shall retain records of all Discharge Monitoring Reports, including eDMR submissions. These
records or copies shall be maintained for a period of at least 3 years from the date of the report. This period may
be extended by request of the Director at any time [40 CFR 122.41].
Page 6 of 6

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Longitude: 76046'02" 8-Dugut HUC: 03010203 cation
Stream Class: C, NSW
Ashton Lewis Lumber Company
Deck Storage Site
Receiving Stream: UT of Bennetts Creek, Chowan River Basin North
NC0089541

COMMUNICATIONS
NORTH CAROLINA LLC
The Daily Reflector- The Daily Advance - The Rocky Mount Telegram
Bartle Ledger- Chowan Herald - Duplin Times - Farmville Enterprise - Perquimans Weekly - Standard Laconic
Tarboro Weekly -Times Leader - W lliamston Enterprise
PO Box 1967, Greenville NC 27835
Date: July 15, 2015
- LEGALAD PROOF -
Thank you for advertising with us! This is the proof of your ad scheduled to run on the
dates indicated below. If changes are needed, please contact Brian Gray by phone at
[phone] or email at [e-mail].
CUSTOMER INFORMATION
Account #:
100553
Company Name:
NC DENR/DWQ/PT. SOURCE BRANCH
Address:
Wren Thedford
1617 MAIL SERVICE CENTER
RALEIGH NC 27699-1617
Telephone:
[phone]
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Ad Proof
Public Notice
North Carolina Environmental Manage-
ment Commission/NPDES Unit
1617 Mail Service Center
Raleigh, NC 27699-1617
Notice of Intent to Issue a NPDE5
Wastewater Permit
The North Carolina Environmental
Management Commission proposes to
issue a NPDES wastewater discharge
permit to the person(s) listed below.
Written comments regarding the pro-
posed Dermit will be accented until 30
(cent degree of public interest Please
mail comments and/or information re-
quests to DWR atthe above address.ln-
terested persons may visit the DWR at
512 N. Salisbury Street, Raleigh, NC to
review information on file. Additional
ps/npdesrWlendar, or by calling (919)
807-6304.
Ashton Lewis Lumber Company re-
quested a new permit NCO089541 for
its Wet Deck Log Storage Site in Gates
Counry; this permitted discharge is
treated industrial wastewater to Un-
named Tributary of Bennetts Creek,
Chowan River Basin.
7/19
y.s hJ3
q/i/-?'oIS

i o l 7- T-a C, -t 5: h a f
NC DENR/DWR/NPDES Permitting Unit
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
NPDES PERMIT NC0089541
Facility Information
Applicant/Facility Name:
Ashton Lewis Lumber Company
Applicant Address:
96 Lewis Mill Road, Gatesville, NC 27938
Facility Address:
96 Lewis Mill Road, Galesville, NC 27938
Permitted Flow
Not applicable
Type of Waste:
Domestic (0%) / Industrial 100%
Pretreatment Program
Not Applicable
Facility Class/Permit Status:
Class PCNC / New Permit
County:
Gates County
Miscellaneous
Receiving Stream:
UT of Bennetts Creek
Regional Office:
Washington
Stream Classification:
C; NSW
8-digit 14UC:
03010203
303(d) Listed?
No
Permit Writer:
Yang Son
Subbasin/ Stream Index:
03-01-Ol/ 25-17
Date:
July 6, 2015
Drainage Area (mi):
Lat. 36023' 46" N Long. 76° 46' 02" W
Summer 7Q10 (cfs):
Winter 7Q 10 (cfs):
Average Flow (cfs):
IWC (%):
100%/Tidal Effect
PERMIT ACTION:
This is an NPDES permit application for NEW DISCHARGE from a wet decking operation and boiler
blowdown.
BACKGROUND:
Ashton Lewis Lumber Company (Ashton Lewis) operates a southern yellow pine sawmill in Gatesville,
NC. Ashton Lewis is planning to discharge wastewater from a wet decking operation and boiler
blowdown. The proposed discharge will be comprised of the following waste streams:
• Wet Deck process wastewater - 576,000 GPD
• Stormwater— 1,000 GPD
• Boiler Blowdown - 1,700 GPD
The Permittee proposed to operate the wet decking mainly during dry seasons. However the boiler
blowdown is produced continuously with addition of chemicals. The Division proposed two outfalls for
wastewater would be applicable for this situation, which is accepted by the facility. Outfall 001 will
discharge wastewater from wet deck process and stormwater runoff. Outfall 002 will discharge boiler
blowdown. Both outfalls discharge to an unnamed tributary to the Bennetts Creek, a class C; NSW water
in the Chowan River Basin. Ashton Lewis has its stormwater discharges under general NPDES
stotmwater permit NO. NCG210185. This facility's wet decking operation SIC is 2411 and federal
guideline 40 CFR 429 Subpart I applies.
TREATMENT PROCESS:
For outfall 001, wastewater is captured from the wet decking operation where stacked logs are sprayed
with water pumped from nearby surface water. The wet decking wastewater passes through a bark screen
into an on -site detention pond that flows to an unnamed tributary of the Bennetts Creek through an
Fact Sheet
Page I

overflow pipeline. The screen and drainage area are cleaned routinely to remove any wood byproducts
such as bark to prevent build up.
For outfall 002, the non -process industrial boiler blowdown is discharged directly to the same unnamed
tributary.
RECEIVING STREAM:
• The receiving stream is an unnamed tributary of Bennetts Creek, which is classified C; NSW.
• Bennetts Creek is not an impaired stream on the 2014 final 303(d) list.
• USGS indicates records from 1977 shows one point, upstream of proposed discharge point, has
the estimated 7Q 10 as 0.2cfs with tidal influence.
COMPLIANCE REVIEW:
• This is a proposed NEW discharge. No compliance record.
PERMIT DEVELOPMENT (for NEW discharge):
• SEPA/FONSI Determination
The proposed discharge is not subject to SEPA review.
• Endangered Species Review
It was reported that U.S. Fish and Wildlife Service concurred that the proposed discharge would
not likely adversely affect any federally -listed endangered or threatened species, their formally
designated critical habitats, or species currently proposed for listing under the Act at the Gates
County locations.
• Local Government Review
Gates County Planning Department has completed its review of the application and a completed
local government review form was send to the Division with the application. Gates County
indicated that the plan for proposed facility is consistent with the local ordinance.
• DWR Regional Office Review
The DWR Washington Region staff conducted an on -site visit on April 29, 2015. No issues were
found during this inspection.
• Federal Effluent Guideline Review
Wet decking is regulated by 40 CFR429 Subpart I which requires no debris discharged, and the
pH between 6.0 and 9.0 S.U.
• Impaired Waters Review (303(d) List)
The receiving stream is not on the 2014 final 303(d) list.
• Antidegradation Review
Per NC Antidegradation Policy (15A NCAC 213.0201), each applicant for a new/expanding
NPDES permit must document an effort to consider non -discharge alternatives pursuant to 15A
NCAC 2H.0105(c)(2). The Engineering Alternatives Analysis (EAA) document was submitted as
part of the NPDES application package. DWR staff reviewed the EAA and concurred with the
engineering alternatives analysis conclusion that a direct discharge to surface water was the most
environmentally sound alternative from the reasonably cost-effective options (per 15A NCAC
2H.0105). The 20-year present cost analysis for each alternative is listed below:
o Land Application - $1,660,673.00
o Wastewater Reuse - $589,790.00
o Surface Water Direct Discharge - $2 f 3,942.00
o Combination (Surface Water Discharge/Land Application) - $589,790.00
• Proposed Limits/Monitoring
Outfall 001
o Flow: Weekly monitoring
o TSS: Weekly monitoring with limitations of monthly average 30 mg/L and daily
maximum 45 mg/L
Fact Sheet
Page 2

o pH: Weekly monitoring with limitations of not less than 6.0 S.U. nor greater than 9.0
S.U.
o Oil and Grease: Weekly monitoring
o Nutrients (TN and TP): There are no nutrient limits proposed in this permit since the
proposed discharge is not considered a nutrient source. However, quarterly nutrient
monitoring will be required in accordance with 15A NCAC 2B.0508
Outfall 002
o Flow: Quarterly monitoring
o Temperature: Quarterly monitoring
o pH: Quarterly monitoring with limitations of not less than 6.0 S.U. nor greater than 9.0
S.U.
o Chemical Oxygen Demand (COD): Quarterly monitoring
SUMMARY OF PROPOSED PERMIT CONDITIONS:
The Tables below summarizes proposed permit conditions for two proposed NEW discharges:
Outfall 001
EFFLUENT
CHARACTERISTICS
LIMITATIONS
RATIONALE FOR LIMITATIONS
Monthly Average
Daily Maximum
Flow (GPD)
15A NCAC 213.0500
Total Suspended Solids
30 mg/L
45 mg/L
15A NCAC 213.0500; BPJ
H
Not less than 6.0 S.U. nor greater than 9.0 S.U.
40 CFR429; 15A NCAC 213.0211
Oil and Grease (mg/L)
I
BPJ
Total Nitrogen (TN) (mg/L)
Monitor & Report
15A NCAC 213.0508
Total Phosphorus (TP) (mg/L)
Monitor & Report
15A NCAC 213.0508
Outfal1002
EFFLUENT
LIMITATIONS
RATIONALE FOR LIMITATIONS
CHARACTERISTICS
Monthly Average
Daily Maximum
Flow (GPD)
NCG500000 Consistence
Temperature (°C)
15A NCAC 2B.0211; NCG500000
Consistence
H
Not less than 6.0 S.U. nor greater than 9.0 S.U.
15A NCAC 213.0211
Chemical Oxygen Demand
NCG500000 Consistence
(COD) (mg/L)
PROPOSED SCHEDULE FOR PERMIT ISSUANCE:
Draft Permit to Public Notice
Permit Scheduled to Issue:
NPDES DIVISION CONTACT:
July 22, 2015 (estimate)
September 7, 2015 (estimate)
If you have questions regarding any of the above information or on the attached permit, please contact
Yang Song at [phone] or by email at [e-mail].
ncdenr.gov.
NAME: I � DATE:
COMMENTS:
No comments were received from the WaRO — Water Quality Program. The Permittee provided
comments about the on -site ORC. After conferring with NC Operators Certification Program and
Washington Regional Office, the facility classification was changed to physical chemical not classified
(PCNC) and the facility is not required to have an ORC or a back-up.
Fact Sheet
Page 3

SOC PRIORITY PROJECT: No
To: DWR - Water Quality Programs
NPDES Complex Permitting Unit
Attention: Tom Belnick / Yang Song
Date: May 4, 2015
NPDES STAFF REPORT AND RECOMMENDATIONS
County: Gates
NPDES Permit No.: NCO089541
PART I - GENERAL INFORMATION RECEIVEDIDENR/DWR
1. Facility and address: Ashton Lewis Lumber Company MAY 8 2015
96 Lewis Mill Road
Water Quay:
Gatesville, NC 27938 pemdftsedw
2. Date of investigation: April 29, 2015 (inspection attached)
3. Report prepared by: Scott Vinson, Environmental Engineer
4. Person contacted and telephone number: Mr. Michael Lancaster [phone]
5. Directions to site: The facility is located west of Gatesville off NC Hwy 137 at 96 Lewis
Mill Road, in Gates County, North Carolina.
6. Discharge point(s), list for all discharge points:
Outfall 001
Latitude: 360 23' 45.4" N
Longitude: 760 45' 55.6" W
7. Receiving stream or affected surface waters: Canal to Bennetts Creek (Merchants Mill
Pond)
a. Classification and Stream Index No.: C; NSW, 25-17
b. River Basin and Subbasin No.: Chowan, 03-01-01
C. Describe receiving stream features and pertinent downstream uses: The receiving
stream is classified and used for secondary recreation, fishing, wildlife, fish
consumption, aquatic life including propagation, survival and maintenance of
biological integrity, and agriculture. Secondary recreation includes wading,
boating, and other uses involving human body contact.

RECEIVED/DENR/DWR
Page Two
MAY 8 Z015
Water Quality
Permitting Section
PART II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
a. Volume of wastewater: Discharge will be daily and can be continuous at times
during operation of the wet deck.
b. What is the current permitted capacity: n/a
C. Actual treatment capacity of current facility (current design capacity): n/a
d. Description of existing or substantially constructed W WT facilities: n/a
e. Description of proposed WWT facilities: bar screenand settling pond
f. Possible toxic impacts to surface waters: Ashton Lewis poses no apparent toxic
impacts to surface waters.
PART III - OTHER PERTINENT INFORMATION
Special monitoring or limitations (including toxicity) requests: none
2. Compliance: The facility has not started their wet deck spray operation yet this year and
therefore is currently compliant. However, it is understood from my site visit that they
are in need of spraying their wet deck typically around Memorial Day each year. The
proposed bar screen and settling pond seem to be in order for a typical wet deck operation
and the region has no further questions from the applicant.
PART IV - EVALUATION AND RECOMMENDATIONS
Ashton Lewis Lumber Company has requested coverage under an NPDES discharge permit and
the Washington Regional Office recommends issuing the permit once proper notice has been
given and a draft permit has been issued and reviewed by all parties.
SZy&-
Scott Vinson �'
Signature of Report Preparer Date
- 2) h: 71CM s &
Robert Tankard
WQROS Assistant Regional Supervisor Date

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NCCT08gsv) - &'Co3eg Wei NEW
3�2o�S
National Pollutant Discharge `Elimination System
Individual Permit Application
Ashton Lewis Lumber Company
Gatesville, Gates County, North Carolina
March 2015
Prepared for:
I�gON <F
�GMeEa�
Ashton Lewis Lumber Company
96 Lewis Mill Road
Gatesville, North Carolina 27938
Prepared by:
Wolff •
Coury Science & Engineering, PLLC
471 Royal Tern Drive
Hampstead, North Carolina 28443

March 12, 2015 RECEIVED/DENR/DWR
MAk 16 2015
NC DENR / DWR / NPDES Unit
1617 Mail Service Center Water Quality
Raleigh, NC 27699-1617 Permitting Section
RE: NPDES Permit Application and Engineering Alternative Analysis
Ashton Lewis Lumber Company
Gates County
Attached are the original and two copies of the completed Form C-MI and Engineering
Alternative Analysis for Ashton Lewis Lumber Company. The application is for a proposed wet
decking operation for the Ashton Lewis facility located in Gates County, NC.
If you should have any questions concerning this renewal application or need additional
information, please contact Sean Coury at 910-685-3662 or email, [e-mail].
Thank you.
Certification:
"I certify, under penalty of law, that this document and all attachments were prepared under my direction or
supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate
the information submitted. Based on my inquiry of the person or person who manage the system, or those persons
directly responsible for gathering the information, the information submitted is, to the best of my knowledge and
belief, trite, accurate, and complete. I am aware that there are significant penalties for submitting false information,
including the possibility offtnes and imprisonment for knowing violations. "
Sincerely,
; I �� A vv-�
Michael Lancaster
Operations Manager

Ashton Lewis NPDES Permit Application March 2015
Ashton Lewis Lumber Company (Ashton Lewis) operates a southern yellow pine sawmill in Gatesville, Gates
County, North Carolina. Ashton Lewis falls under the standard industrial classification (SIC) code of 2421 for
Sawmills and Planing Mills, General.
The facility is proposing to permit wastewater discharges from a wet deck operation and boiler blowdown.
PERMIT REQUEST AND PERMIT FEES
The purpose of this application is for a new individual National Pollutant Discharge Elimination System (NPDES)
Permit. The facility's stormwater discharges are currently covered under general NPDES stormwater permit No.
NCG210185. The plant does not have a sludge management plan because wastewater is not treated onsite.
This application is intended to satisfy all requirements of 15A NCAC 2H .0105. In accordance with the North
Carolina (NC) Division of Water Resource (DWR) fee schedule, the fees associated with new permit applications for
Minor Individual NPDES permits is $860, which is being submitted with this application. Included in this package is
one original and two copies of the application as required.
Ashton Lewis is not required to obtain an Authorization to Construct (ATC) following issuance of the NPDES permit
by the NC DWR. Session Law 2011-394, which became effective July 1, 2011, no longer requires ATC permits for
wastewater generated from manufacturing facilities.
FACILITY INFORMATION
ink� The physical and mailing address for Aston Lewis is as follows:
P.O. Box 5
96 Lewis Mill Road
Gatesville, North Carolina 27938
1M*
To facilitate review of this application, please contact the following individuals identified below.
Preoarer's Contact Information:
Sean Coury, PE (NC)
Partner
Coury Science & Engineering, PLLC
[phone]
[e-mail]
DOCUMENT ORGANIZATION
Facilitv's Contact Information:
Michael Lancaster
Operations Manager
Ashton Lewis Lumber Company
[phone]
[e-mail]
This permit application is divided into five sections and various appendices. Tables are included throughout the
document and are referenced in the table of contents. The seven sections and four appendices are as follows:
Section 1 Introduction
Section 2 Site Information
Section 3 Effluent Description and Treatment
Section 4 Engineering Alternatives Analysis
Section 5 Application Form
Refer to the table of contents for a detailed listing of tables and figures.
Page 4 of 24

/"W.
Ashton Lewis NPDES Permit Application March 2015
This section provides information on the site location, surrounding terrain, and description of industrial activities.
SITE LOCATION
Ashton Lewis is situated on approximately 75 acres in Gatesville, Gates County, North Carolina. The approximate
coordinates are 36023'53.69" N, 76°46'02.50" W. The facility stormwater and wastewater will feed into an easterly
flowing canal that eventually discharges into the portion of Bennetts Creek located south of the NC Hwy 37 / NC
Hwy 137 intersection in Gatesville, Gates County, North Carolina.
Bennetts Creek is a class C; NSW stream located in the Chowan River Basin. Bennetts Creek is not on the 303(d)
(Impaired Waters) list for any pollutants.
DESCRIPTION OF MANUFACTURING PROCESS
Ashton Lewis operates a state-of-the-art sawmill which produces flooring, paneling, siding, window blanks, and a
variety of other wood products based on customer specifications and requests. Ashton Lewis receives high quality
southern yellow pine logs. The logs are separated based on intended use or product and maintained in the
concrete storage area until ready for production. Ashton Lewis will utilize wet spray to maintain adequate
moisture content in the lumber. The wet spray (or wet decking) operation reduces end checking, log staining, and
decay, which in turn allows for a higher quality product.
AO%k The logs are mechanically debarked and transferred to either one of the two sawing lines. A scanning carriage and
single band mill breaks down larger logs while a unique and versatile end -dogging machine processes smaller logs
through twin bandsaws. Further reduction occurs downstream as lines merge to a twin horizontal resaw and then
are edged with either of two multiple saw scanning optimized edgers.
All sawn lumber Is optimized for end trimming and sorted for drying by thickness, length, width, and grade in a
computerized 26 bay drop bin sorter. All lumber is mechanically stacked and dried in one of seven computer
controlled low temperature steam dry kilns. All steam for this segment of the operation is produced by a
gasification type wood waste boiler plant. The boiler plant consists of two wood -fired boilers with a rated heat
input capacity of 19.1 and 28.7 million Btu per hour capacity, respectively.
Lumber is cooled in covered areas and routed to a very versatile finish mill. Two high-speed pattern planers finish
most domestic sales lumber and a German 8 head Weinig Moulder produces architectural profiles. Simultaneously,
rough kiln dried lumber can be graded on a parallel system. All lumber is graded in air-conditioned, constant
lighted room and passes to a computerized separator and package maker.
Any excess trimmings or off -grade lumber, chipped in a chipping machine, bark, and sawdust are used as fuel in
the wood waste boiler plant.
SITE MAP
A site map depicting the facility and surrounding areas is located in Appendix 1. The log storage area where the
wet deck operation will take place has been outlined in red and the proposed location of the settling basin is
outlined in blue. The facility outfall location has been denoted with a red star on the site map.
GOON A topographic map that shows the terrain of the site and surrounding areas is included in Appendix 2.
Page 5 of 24

l Ashton Lewis NPDES Permit Application March 2015
This section describes the effluent that will be generated from the wet decking operation and boiler blowdown.
The section also details the proposed method of wastewater treatment and disposal and engineering design
analysis.
DESCRIPTION OF DISCHARGED WASTEWATER AND TREATMENT
Ashton Lewis is proposing to permit discharge from a wet decking operation, which will be used to spray water
onto the log storage piles especially during warmer, dryer months. Surface water will be pumped from a canal that
drains to Bennetts Creek and then sprayed onto logs stockpiled on the wet deck via spray nozzles. Ashton Lewis is
proposing to install concrete curbing around the perimeter of the concrete log storage pad which will be sloped in
a manner that will ensure water will flow into a detention/settling pond prior to discharge back into the canal via
Outfall 001, indicated on the site map in Appendix 1. Since the water will operate as a single use or single pass
system (i.e., water is not reused or continuously recycled), the quality of the water returned to the canal is similar
in quality to that originally withdrawn. Use of a single pass system will help reduce the discharge of pollutants and
ensure a low biochemical oxygen demand (BOD) in the effluent stream.
The wet decking operation will consist of four sprinkler heads, each with an approximate flow rate of 100 gallons
per minute (gpm). The calculated maximum flow rate is 0.576 million gallons per day (MGD), assuming 100 gpm
from each of four sprinkler heads for 1,440 minutes per day. No chemicals will be added for the wet decking
operation, and once -through water will be pulled from a nearby canal. A water flow line diagram is included in
A„kl Appendix 3.
Ashton Lewis is also proposing to permit non -process industrial wastewater discharge from boiler blowdown.
Boiler blowdown is water that is purged from the boiler to avoid building up impurities within the boiler. The
discharge from the boiler blowdown at Ashton Lewis is estimated to be 1,700 gallons/day and will be comingled
with the overflow from the settling pond. Chemicals are added to boiler feed water daily in order to prevent
corrosion, scaling, and deposition in the boiler. The following chemicals are expected to be present in the boiler
blowdown water, prior to comingling with the pond overflow water:
Product Name
Chemical Components
Usage
SEL Loxy 600
Sodium sulfate (>95%)
Cobalt sulfate (<3%)
1 cup per day
SEL Lamine 340
Diethylethanola mine (30-50%)
1 gallon per day
SEL Lamine 316H
Diethylethanola mine (10-30%)
1 gallon per day
SELplus 730M
I Sodium hydroxide (<0.5%)
1 gallon per day
ESTIMATED EFFLUENT DATA
US EPA effluent limitations guidelines for Timber Products Processing (40 CFR 429), Subpart I, Wet Storage
Subcategory, states that there shall be no debris discharged from the wet decking operation and provides ranges
for effluent pH. As required by these federal effluent limitations guidelines, there will be no debris present in the
effluent and the pH will remain within the range of 6.0 to 9.0. To ensure that no debris will be present in the
PON discharge, all runoff associated with the wet decking operation will be routed to a settling pond prior to discharge.
Page 6 of 24

/1
Ashton Lewis NPDES Permit Application March 2015
In accordance with the 2007 Chowan River Basinwide Water Quality Plan, all waters in the Chowan River Basin,
including Bennetts Creek, are classified as NSW (Nutrient Sensitive Waters) which requires wastewater dischargers
to set permitted nitrogen and phosphorus limits of 3 mg/I and 1 mg/I, respectively. Based on the characteristics of
the proposed wastewater stream and the design of the proposed wet settling basin, effluent nitrogen and
phosphorus quantities are expected to be well within these specified limits.
The system has been designed to minimize BOD and chemical oxygen demand (COD). The water
withdrawal/discharge system is designed to be a single pass system to prevent concentrations of BOD and COD
from increasing. Additionally, incoming water will pass through a filter to minimize the amount of bark that is
introduced to the settling basin. The proposed settling basin will include a forebay to provide an additional
pretreatment step and reduce solids in the permanent pool.
ENGINEERING DESIGN OF SETTLING POND
The runoff from the proposed wet decking operation will be diverted to a wet detention pond prior to discharge to
surface waters. The pond has been designed in accordance with USDA Soil Conservation Services Practice
Standard Code No. 378 and the North Carolina Department of Environment and Natural Resources (NCDENR)
Practice Standards and Specifications for Sediment Basins. Appendix 4 includes a drawing of the proposed settling
pond and supporting calculations. The proposed pond is designed with a 2.5:1 length to width ratio, which Is
greater than the recommended minimum of 2:1. The proposed volume of the pond is 43,052 cubic feet and
results in a hydraulic residence time of 13.4 hours at maximum flows. Additionally, the proposed pond has been
designed with a forebay to enhance solids removal and reduce the cost of pond cleanouts. The proposed forebay
lom� is 20% of the pond size. The permanent pool and the forebay pool are 4 feet deep with 1 foot of sediment storage.
^�
In accordance with ISA NCAC 2H .0105, an Engineering Alternatives Analysis (EAA) is required for any new
wastewater discharge. This section contains the components of the engineering alternatives analysis including
determination if the proposed discharge will be allowed, flow projections, evaluation of technically feasible
alternatives, and evaluation of economically feasible alternatives.
ALLOWABLE PROPOSED DISCHARGE
Prior to evaluating alternatives, Ashton Lewis made the determination that the proposed wastewater discharge
would be allowed. The following sections detail the evaluation that was conducted in order to confirm that the
proposed wastewater would be an allowable discharge. The restrictions that could be imposed on a proposed
wastewater discharge to surface waters include zero flow stream restrictions, receiving stream classifications,
NPDES permitting strategies listed in the Basinwide Water Quality Plans, impaired water and Total Maximum Daily
Load (TMDL) classifications, and the presence of endangered species.
STREAM FLOW RESTRICTIONS
Specific stream restrictions are listed in 15A NCAC 2B .0206(d)(2) for oxygen -consuming wastewater in zero -flow
streams. In efforts to determine the 7Q10 flow at the proposed discharge location into Bennetts Creek, Mr. Curtis
Weaver, with United States Geological Services (USGS), was contacted. Mr. Weaver indicated that the low -flow
files at the USGS South Atlantic Water Science Center in Raleigh, NC did not indicate any determinations for the
specified point of interest. There were, however, records from 1977 for a point in Bennetts Creek, upstream of the
Page 7 of 24

/0*%
Ashton Lewis NPDES Permit Application March 2015
proposed discharge point that Indicated a 7Q10 of 0.2 cubic feet of water per second. A copy of the
correspondence with the USGS is included in Appendix 5.
RECEIVING STREAM CLASSIFICATION RESTRICTIONS
The stream classification for Bennetts Creek is C (Class C), which does not impose stricter treatment standards than
federal standards. All waters in the Chowan River Basin, including Bennetts Creek, are classified as NSW (Nutrient
Sensitive Waters) which requires wastewater dischargers to set permitted nitrogen and phosphorus limits of 3
mg/I and 1 mg/I, respectively. Based on the characteristics of the proposed wastewater stream, effluent nitrogen
and phosphorus quantities should be well within these specified limits.
Bennetts Creek is not listed as impaired on the 303(d) list and is not subject to any impending TMDLs according to
the NC DWR's website. Bennetts Creek is located In the Chowan River Basin. The 2007 Chowan River Basinwide
Water Quality Plan was reviewed and no additional standards or restrictions were required for Bennetts Creek.
ENDANGERED SPECIES
If endangered species are suspected to be present in the proposed discharge location, then additional restrictions
may be implemented for wastewater discharges in that area. To determine if any endangered species might be
present in the area of discharge to Bennetts Creek, an evaluation request was submitted to Mr. Pete Benjamin, US
Fish and Wildlife Services— Raleigh Field Office.
According to US Fish and Wildlife Service's response, the proposed discharge would not likely adversely affect any
ram, federally -listed endangered or threatened species, their formally designated critical habitat, or species currently
proposed for listing under the Act at the Gates County location. Therefore, the requirements for section 7(a)(2) of
the Endangered Species Act of 1973 were satisfied for this project.
The US Fish and Wildlife Services was, however, concerned about potential impacts on aquatic species, since they
are highly susceptible to sedimentation. Since Ashton Lewis proposes to install a pond to provide for settling of
solids prior to discharge, the proposed discharge is not expected to adversely impact aquatic species. The
correspondence with US Fish and Wildlife Services is included in Appendix 6.
ZONING
Ashton Lewis is currently operating a sawmill at the Lewis Mill Road site (Parcel No. 0101346) which is zoned as'A-
1' for agricultural uses. Following discussions with Ms. Jennifer Baptiste, Gates County Planning Department, it
was confirmed that wood products manufacturing is allowed for parcels zoned for agricultural use; however, a
special use permit is required for new wood products operations. Since the facility is existing, the property has
been grandfathered from the requirements to obtain a special use permit. Therefore, in accordance with our
discussions with Gates County Planning Department, the site and proposed discharge is consistent with local
zoning ordinances.
Gates County Planning Department has completed its review of the application and a completed Local
Government Review Form is included in Appendix 7.
FLOW PROJECTIONS
Page 8 of 24

Ashton Lewis NPDES Permit Application March 2015
The population projections are not applicable to industrial facilities, but instead apply to domestic wastewater
production for evaluation of an increase or decrease in population. The projected wastewater flows for Ashton
Lewis are only dependent on the manufacturing operation, and would not be affected by changes in population.
As previously discussed in this application, the projected wastewater flow is expected to be approximately 578,000
gallons per day. Of that 576,000 gallons is proposed to be discharged from the wet decking operation (settling
pond) and 1,700 gallons from boiler blowdown.
TECHNOLOGICALLY FEASIBLE ALTERNATIVES
The section includes the evaluation of other technologically feasible alternatives for wastewater discharge. As
listed in the NC Division of Water Resource's Engineering Alternatives Analysis (EAA) Guidance Document, the
determination includes the evaluation of the technological feasibility of the following:
1. Connecting to an existing wastewater treatment plant
2. Land application through spray irrigation
3. Reuse of wastewater
4. Surface water discharge through NPDES permitting
5. Combination of any of the alternatives
CONNECTION TO EXISTING WASTEWATER TREATMENT PLANT
The only wastewater treatment facility located in Gates County operates under a NC DWQ's non -discharge permit
/�. (Permit No. WQ0000267). The permit, which is currently undergoing renewal, is issued to Gates County
Correctional Facilities and accepts wastewater from the county correctional facility, Gatesville Middle and High
Schools, and the Division of Transportation. The facility is permitted with a 25,000 gallon per day capacity as a
spray irrigation and disposal facility. After speaking with Mr. Timothy Hedgepeth, Water Plant Supervisor, it was
confirmed that the wastewater treatment facility is a very small operation and could not accept wastewater of the
magnitude proposed by Ashton Lewis. Therefore, it has been determined that connection to an existing
wastewater treatment plant is technologically infeasible for the Ashton Lewis location.
r
LAND APPLICATION
Soil types in the vicinity of the proposed wet decking operation were reviewed to evaluate the potential for
disposing of the wastewater via land application (or spray irrigation). The only remaining land, not occupied by the
plant footprint, located on the Ashton Lewis property is forestland; therefore, the only option for spray irrigation
would be the purchase of additional farmland nearby the facility. The neighboring farmland consists of primarily
the following soil types: NaA (Nawney loam), AaB (alaga sand), PaA (Pactolus Sand), and IcA (Icaria fine sandy
loam). According to the soils report obtained from USDA, these soil types are classified as 'very limited' for
disposal of wastewater by Irrigation, meaning that the soils have at least one feature that make them unfavorable
for disposal of wastewater by irrigation. As described in the USDA soils report, 'very limited' classifications
typically means that "the limitations cannot be overcome without major soil reclamation, special design, or
expensive installation procedures." The poor performance can be attributed to soil characterizations such as
depth to saturated zone, filtering capacity, and high acidity. Appendix 8 includes a map from the USDA Custom
Soil Resource Report which depicts the various soil types and classification for wastewater disposal by irrigation.
Page 9 of 24

^N
Ashton Lewis NPDES Permit Application March 2015
NCDENR non -discharge rules (15A NCAC 02T Sections 0.0100-0.1600) and the coastal waste Treatment Disposal
rules (15A NCAC 02H Section 0.0400) describe the limitations for land applications. The Ashton Lewis facility
(Gates County) is located in a designated coastal area (15A NCAC 02H Section 0.0403(3)).
Due to the speculative nature of this exercise, specific property tracts have not been identified yet for this
alternative; therefore, the necessary testing has not been performed. Based on the USDA soils report, there is a
combination of well -drained soil types (AaB) and poorly drained soil types (NaA and PaA). For cost estimation
purposes, it is assumed that the highest application rate for low -rate application can be met in the soils located in
the property adjacent to the facility. If the infiltration rate is lower, then the costs to accomplish infiltration would
be much higher.
The low -rate infiltration cutoff for designated coastal areas is 0.156 gallons per day per square foot (gpd/ftz) (15A
NCAC 02T 0.0702(1)). Therefore, the application of 0.578 MGD would require at least 3,703,205 ftZ of property (85
acres). Assuming the adjacent property to the Ashton Lewis facility is suitable for land application and available for
sale, approximately 1.8 miles of piping would be required to transfer and apply the water over 85 acres.
WASTEWATER REUSE
Reuse of water from wet decking operations is commonly utilized; however it does pose several disadvantages.
When wastewater from wet decking operations is continuously recirculated the level of BOD in the wastewater
continues to increase and debris from the operation begins clogging pumping and sprinkler heads. Additionally,
large storage basins will be required to ensure that water is not discharged during heavy rain events. According to
�^ the National Oceanic and Atmospheric Association (NOAA) Atlas 14, Volume 2, Version 3 for the Edenton, NC
station, 24-hr 25-yr precipitation estimates for the Ashton Lewis facility are approximately 7.2 inches (Appendix 9).
Therefore, a storage basin capable of holding 0.578 million gallons of water in addition to the regulatory required 2
foot freeboard requirement and additional freeboard requirement to prevent a discharge during high intensity rain
events will be required. In addition to a large storage basin, some form of land application will be required so that
discharge does not occur during extended wet periods. For this exercise, it is assumed that the water equivalent of
approximately V of freeboard will be required to be land applied. It is estimated that an 8-foot deep storage basin
with a surface area of 15,453 square feet will be required. Therefore, approximately 115,500 gallons of water will
be required to decrease the storage basin by 1'.
SURFACE WATER DISCHARGE THROUGH NPDES PROGRAM
The Ashton Lewis facility is in close proximity to Bennetts Creek, which drains into the Chowan River. Wastewater
associated with the Ashton Lewis operation will include canal water that is sprinkled on logs, stormwater, and
boiler blowdown. Wastewater will pass through a filtration step and a settling pond prior to discharge. Feasibility
studies for discharge into Bennetts Creek have been discussed in prior sections.
The surface water discharge option will require a settling pond and minimal piping to transfer the water from the
settling pond to an unnamed tributary that drains into Bennetts Creek.
COMBINATION OF ALTERNATIVES
A combination of wastewater reuse with land application was already considered as an option in the wastewater
reuse section. Wastewater reuse with surface waster discharge is technologically feasible; however, it is not
10",° recommended for wet decking applications. As previously discussed, the BOD will increase when water is
Page 10 of 24

AOM,
/'\
Ashton Lewis NPDES Permit Application March 2015
continuously recirculated. BOO effluent limitations would most likely be exceeded; therefore, a combination of
wastewater reuse and surface water discharge will not be considered.
Discharge to surface waters is the least complicated option and will require the least amount of construction to
implement. Combination of land application with surface water discharge will be much more costly than utilizing
the surface water discharge option alone. The combination of land application with surface water discharge will
be comparable to the wastewater reuse option; therefore, the cost will be assumed to be equal to the wastewater
reuse option.
ECONOMIC FEASIBILITY OF ALTERNATIVES
This section addresses the economic feasibility of each of the technologically feasible engineering alternatives.
Those alternatives that were considered technologically feasible and evaluated in this section are land application,
wastewater reuse, and surface water discharge through the NPDES program. Each cost analysis includes the
capital cost, recurring cost, and lost opportunity costs. The cost estimates are determined assuming 20 years of
operation. The cost analyses are explained in detail below for each technologically feasible alternative.
LAND APPLICATION
Appendix 10-1 includes cost estimate details for land application. It is estimated that the purchase of 105 acres
would be necessary for disposal of wastewater via land application based on infiltration rates and setback
requirements. Land costs were estimated based on the USDA 2014 land values summary for farmland in North
Carolina.
Land Application costs include the cost of a settling pond, a pump station, 1.8 miles of piping, and an irrigation
system capable of supplying water to 87 acres of land. The cost could be substantially more if adjacent land is not
available or if existing soils need significant work to make them suitable for land application. The total present
value cost analysis for land application was found to be $1,660,673.
WASTEWATER REUSE
Appendix 10-2 includes cost estimation details for wastewater reuse. A combination of wastewater reuse and land
application was considered to provide options during extended periods of increased precipitation. An application
rate of 100 gpm is assumed and that the application will be split over three eight hour days, resulting in an
application rate of 38,300 gallons per day. Using the same assumptions as the land application alternative, the
wastewater reuse alternative will require approximately six acres of property and an additional three acres of
property for setbacks. In addition to the land purchase, costs for the wastewater reuse option include 1.0 miles of
piping, a settling basin, a pump station, irrigation systems, and ancillary equipment. The total present value cost
analysis for wastewater resuse was found to be $589,790.
SURFACE WATER DISCHARGE THROUGH NPDES PROGRAM
Appendix 10-3 includes cost estimation details for surface water discharge through the NPDES program. Discharge
through the NPDES program will require a settling basin to remove the potential for discharge of solids. The
estimated cost for construction of the pond was determined from the equation found in Table 2 of An Evaluation
of Cost and Benefits of Structural Stormwater Best Management Practices. The aforementioned reference lists
construction of wet ponds as C=13,909x°'611, where x = drainage area and C = construction cost in current United
Page 11 of 24

Ashton Lewis NPDES Permit Application March 2015
States dollars. A drainage area of 2.2 acres was used to calculate the construction cost. The total present value
cost analysis for discharge through the NPDES program was found to be $213,942.
COMBINATION OF SURFACE WATER DISCHARGE AND LAND APPLICATION
The same land application rate that was used for wastewater resuse was assumed for this scenario. Addtitonally, a
similar sized pond would be required as the wastewater resuse option. Therefore, capital and operation costs
would be similar to the wastewater reuse option. The total present value cost analysis for combination of surface
water discharge and land application was found to be $589,790,
RESULTS OF ECONOMIC FEASIBILITY ALTERNATIVES
A summary the costs of each alternative considered are displayed in the table below.
Alternative
Total Cost
(assumes 20 years of operation)
Land Application
$1,660,673
Wastewater Reuse
$589,790
Surface Water Discharge (NPDES)
$213,942
Surface Water Discharge/Land Application'
$589,790
—Assumed to be same cost as wastewater reuse. Assumed same land application requirements as wastewater reuse.
The alternative with the least economic impact is surface water discharge into Bennetts Creek. The discharge
alternative is less than half the cost of the next closest alternative (wastewater reuse). The most expensive option
is land application.
REPORT CERTIFICATION
This report was prepared by Coury Science and Engineering, PLLC. Coury Science and Engineering is licensed to
practice engineering in the state of North Carolina (P-1120). I, Sean Coury, a North Carolina Professional Engineer
for Coury Science and Engineering certify that the information contained in this report is correct and accurate to
the best of my knowledge.
Sean T Coury, PE (North Carolina PE Number 037855)
OL SEAL
ol"B 5 12

Proposed Wet Deck
Site Map
Ashton Lewis Facility
Gatesville, North Carolina
Al
0
Coordinate System: WGS 1984 Web Mercator Auxiliary Sphere
Projection: Mercator Auxiliary Sphere
Datum: WGS 1984
False Easling: 0.0000
False Northing: 0.0000
Central Meridian: 0.0000
Standard Parallel 1: 0.0000
Auxiliary Sphere Type: 0.0000
Units: Meter

Outfall 001
Latitude: 76' 45' 55.564" N
Longitude:360 23' 45.436" N
N
0 0.050A 0.2 0.3 0.4 0.5 wE
Miles \Y/
s
General Location and Topographic Map
Ashton Lewis Facility
Gatesville, North Carolina
i3.
8m
H,gh tit
Bennetts Creek
Stream Class C; NSW
Sources: Esn, Del-orme. NAVTEO, TomTom, Intennap, increment P Corp., GEBCO, USGS,
FAO, NIPS, NRCAN, GeoBase, IGN, Kadaster NIL, Ordnance Survey, Esn Japan, METI, Esri
China (Hong Kong), swisstopo, and the GIS User Community, Source: Esri, DigitalGlobe,
GeoEye, i-cubed. USDA, USGS, AEX, Getmapping, Aerogrid, IGN, IGP, swsstopo, and the
GIS User Community
Coordinate System: WGS 1984 Web Mercator Auxiliary Sphere
Projection: Mercator Auxiliary Sphere
Datum: WGS 1984
False Easting: 0.0000
False Northing: 0.0000
Central Meridian: 0.0000
Standard Parallel 1: 0.0000
Auxiliary Sphere Type: 0.0000
Units: Meter

.^N
Peak Discharge Calculations
Method:NCDENR Stormwater Best Management Practices (BMP) Manual, Chapter 3-Runoff Coefficient
1. C = (Runoff) Coefficient =0.95 (all areas paved with asphalt)
2. A = (Runoff) Area = 2.2 Acres
3. 1 = Intensity, Rainfall (NOAA Atlas 14, Volume 2, Version 3 for the Edenton, NC station)
2-yr, 24hr. storm: 3.79 inches/hour
10yr, 24hr storm: 5.83 inches/hour
4. Calculate Peak Discharge Rate , Q from stormwater runoff
Q = C*I*A (equation 1)
Q2yr,24hr = 10.4 cubic feet per second (cfs)
Q101124hr = 12.2 cfs
Add runoff from wet decking operation —
400 gpm * 0.134 W/gallon * 0.016 min/sec = 0.9 cfs
Q24r,24hr = 10.4 = 0.9 cfs =11.3 cfs
Q10rr,24hr = 12.2 cfs + 0.9 cfs = 13.1 cfs
Pond Calculations
Reference: Fifield, Jerald S. 2004. Designing For Effective Sediment Control on Construction Sites. Forester
Press, Santa Barbara, CA. and Hydraulic Residence Time Method
1. Peak flows of the 10-year, 24 hour storm Q10yr,24hr-
a. Peak flow (see above) : Qioyr„24hr = 13.1 cfs
2. Determine minimum basin volume:
a. Minimum containment volume must be >3,600 cubic feet per acre
V = 3600 ft3/acre x 2.2 acres = 7,920 ft3.

�1 3. Determine minimum surface area:
a. Minimum surface area = 435 ft2 per every cfs.
Minimum Surface Area = 435 ft2 x 13.1 cfs = 5,698 ft2
4. Determine pond dimensions and compare to minimum design requirements
a. Minimum Length to Width ratio is 2:1
b. Proposed depth is 4' for the permanent pool and 1 'for sediment storage
c. The proposed dimensions of the pond are 65' by 165'
Surface area=10,725 ft2
Volume = 42,900 ft3
5. Determine Hydraulic Residence Time (HRT)
a. HRT = Volume / Qavg
%vg = 400 gpm* 60 minutes/hour * 24 hours/day * 0.134 ft3/gallon = 77,000 ft3/day
HRT = 42,900 ft3 / 77,000 ft3/day * 24 hours/day =13.4 hours
6. Determine Pipe Diameter for Pond Discharge (NCDENR Stormwater Manual Section 3.5.2)
a. Q = Co * A * (2 * g * Ho)(1/2)
Co = Coefficient of discharge = 0.6 default value (unitless)
A = Cross Section of Area of Flow at entrance (solve equation to calculate) (ft)
g = Acceleration gravity = 32.2 ft/sec2
Ho = driving head = 1 ft
Q pond discharge = 5 cfs
Solve for A to get:
A =1.2 ft2
A=nr2
r = 0.6' or d=14..... use 18" diameter pipe
7. Vegetation
a. Trees and woody shrubs shall not be planted on the dam structure;
b. Wet ponds should incorporate a minimum of three diverse species of shallow water emergent and
shallow land herbaceous vegetation on the vegetated shelf; A minimum of 50 plants per 200 sf of
shelf area shall be planted;
c. Turf grass shall be provided on the tops of berms and on the exterior slopes of containment berms;
and
d. Weeping love grass shall not be used on the vegetated side slopes because it does not provide long-
term slope stabilization.

Inlet from'
existing
ditch
Forebay Outlet Oriifice
18 inch dia. pipe
10 Corrugated metal
to Outfall 001 2 m
2:1 side slope
CROSS SECTION 4.5:1 SCALE
vegitated
side slope
Freeboard
j slope
I slop I slope
� 1ft
I slope I slope I slope I
I I
Permanent
Forebay I I Pool 4 t
1 I
I
Sediment Storo e Sediment Storage 1ft
Wit
3ft 3ft aft
POND AND WATER FLOW

Wednesday, March 11, 2015 at 10:46:47 AM Eastern Daylight Time
Subject: FW: Initial USGS response concerning... Re: Low Flow Estimates in Gates County
Date: Tuesday, December 2, 2014 at 4:21:31 PM Eastern Standard Time
From: Christy Richardson
To: [e-mail]
FYI.
Christy Richardson
Senr En ineering Project Manager
[phone]
chiisty.a-icltar(Ison (wcou ryse.com
www.courysc.com
An Economically Disadvantaged
Women -Owned Small Business
From: Weaver, John [mailto:[e-mail]]
Sent: Tuesday, December 02, 2014 4:12 PM
To: Christy Richardson
Cc: John Weaver
Subject: Initial USGS response concerning... Re: Low Flow Estimates in Gates County
Ms. Richardson,
In response to your inquiry about the low -flow characteristics for Bennetts Creek downstream of NC Highway 37 at
Gatesville in Gates County, the following information is provided:
A check of the low -flow files here at the USGS South Atlantic Water Science Center (Raleigh unit) does not indicate
any previous determination of low -flow characteristics for the specific point of interest identified via the Iattlong
coordinates provided in your email dated December 01, 2014.
The low -flow files do indicate a previous estimate immediately upstream from your point of interest that was
completed in April 1977 for Bennetts Creek at NC 37 at Galesville (station id 0205359250, drainage area 95 sgmi).
The 7Q10 estimated for the site in 1977 was 0.2 cfs, based on transfer of flow characteristics from a USGS partial -
record station on nearby Cole Creek near Gatesville. However, a note saying "possible tidal effects" was also
written near the estimates.
No USGS discharge records are known to exist for the point of interest. Please also note that available historical
streamflow records are very limited for the area in vicinity of your point of interest.
In the absence of site -speck discharge records sufficient for a low -flow analysis, estimates of low -flow
characteristics at ungaged locations are determined by assessing a range in the low -flow yields (expressed as flow
per square mile drainage area, of cfsm) at one or more nearby site(s) where such estimates have previously been
determined.
For streams in Gates County, the most recently published low -flow information is a statewide report completed in
the early 1990's. It is USGS Water -Supply Paper 2403, 'Low -flow characteristics of streams in North Carolina"
em1 (Giese and Mason, 1993). An online version of the report is available through
http://pti¢s.0 sWgpv w—s 24 rep-g t.p f. The report provides the low -flow characteristics (based on data through
1988) via regional relations and at -site values for rural sites with drainage basins between 1 and 400 sgmi and not
Page 1 of 3

considered or known to be affected by regulation and/or diversions
Please note the low -flow characteristics in the above -referenced low -flow report are based on data ending during
the late 1980's and do not reflect the occurrence of recent droughts, which have resulted in decreased low -flow
statistics at some USGS streamgaging stations.
Inspection of the topographical map suggests the stream location could potentially be affected by tidal influences.
The elevation at the point of interest is 1 meter or less (3.3 feet or less). In USGS Water -Supply Paper 2221 (Giese
and others, 1985), tidal influences up the Chowan River were indicated as far inland beyond the Virginia border
(plate 1), which suggests that your point of interest may be affected by tidal influences.
Please note the USGS SAWSC Raleigh unit currently refrains from providing low -flow estimates for streams known
or suspected of being tidally affected. There are currently no techniques that allow for quantifying the effects
of tides on low flows. Concerns that tides may possibly reduce low -flow discharges (that is, relative to low -flow
estimates for the same stream not tidally -affected) lead us to speculate that any such estimates for these streams
may be too high.
Hope this information is helpful in some manner.
Thank you.
Curtis Weaver
J. Curtis Weaver, Hydrologist, PE Email. [e-mail]
USGS South Atlantic Water Science Center Online: htta:[/nc.water.usas.00v1
North Carolina - South Carolina - Georgia
3916 Sunset Ridge Road
Raleigh, NC 27607
Phone: [phone] // Fax: [phone]
On Mon, Dec 1, 2014 at 2:06 PM, Christy Richardson <christy richardson�couryse.com> wrote:
Curtis,
As we discussed earlier today, I am looking to obtain a low -flow estimate (specifically 7Q10) for
Bennetts Creek, located near Gatesville, Gates County, NC. I have attached a map of the
approximate location on Bennetts Creek, which is just below the 37/137 intersection. The lat/long
coordinates for the location is as follows: 36.396040,-76.752377.
If you have any questions or need anything else, please let me know.
Thanks so much for your help!
Christy Richardson
Senior En ineeri® Project Manager
MMUM
[phone]
[e-mail]
www.cour sy e.com
e0, An Economically Disadvantaged
Women -Owned Small Business
Page 2 of 3

eN Attachment A. Local Government Review Form
General Statute Overview: North Carolina General Statute 143-215.1 tcjt6; allows input frstm local go%cmments in the issuance
of NPDES Permits for non -municipal domestic wastewater treatment facilities. Specifically, the Environmental Management
Commission (EMC) may not act on an application for a new non -municipal Jomestic wastewater discharge facility until it has
received a written statement from each tiny and county govcmmcnt having jurisdiction over any pan of the lands on which the
proposed facility and its appurtenances am to be ktcawd. The written statement shall document whether the city or county has a
zoning or subdivision ordinance in effect and (if such an ordinance is in effcetl whether the proposed facility is consistent with
the ordinance The EMC shall not approve a permit application for any facility which a city or county has determined to be
inconsistent with zoning or subdivision ordinances unless the approval of such application is determined to have statewide
si0fieance and is in the best interest of the State.
Instructions to the Applicant Prior to submitting an application for a NPDRS Prima for a proposed facility, the applicant
shag request that both the nearby city and county govcmmcm complete this to=. The applicant must:
• Submit a copy of the permit application (with a written request for this to= to be completed) to the clerk of the tiny and
the count- by certified mail, return mccipt requested.
• If either (or loth) local government(s) fail(s) to mail the completed fort, as evidenced by the postmark on the certified
mail eard(s), within 15 days after receiving and signing for the certified mail, the applicant may submit the application to
the \PDES Unit.
• As evidence to the Comminion that the local govcmmcm(s) failed to respond within 15 days, the applicant shall submit a
copy of the certified mail card along with a nomrized letter stating that the local govcmmcnt(s; failed to respond within
the 15-dad period.
Inswctions to the Local Government: The m arbt tiny and/or county government which may have or has jurisdiction over
any pan of the land on which the pmposcd facility or its appurtenances are to be located is required to complete and return this
form to the applicant within 15 days of receipt. The form must be signed anti notarized.
Namc of local govemmem �(//.h (4vdl/ _
(Ciro/County)
Does the eift4cougA. have jurisdiction over any pan of the land on which the pmpus. d facility and its appurtenances arc to he
located? Yes (t,4 No ( I If no, please sign this forth, have it notarized, and rcmm it to the applicant.
Doc: the cirr/coumv have in effect a zoning or subdivision odinancce Ycs \o
If there is a zoning or subdivision ordinance in effect, is the plan for the proposed facility consistent with the ordinance% Yes
No
Dare / 0/5— Sign ^• ____
n¢'
Scam of ! Cou/ntr of O,ri(
On this -r. dad of N1 t-Pl I personally apprarrvl before me, the sail
name ,Tt"f)l h 4� , to me knuwm and known to my to Its the (arson described in
and who escorted the foregoing doxumcnt and he (or she) acknowledged that he (or she) csceuted the same arid -bring duh swum
by mc, made math that the smtcmcnm in the foregoing document arc may.
My Commission espins1 j // - .i(/Y .(Signature of Notary Public) -/ A y P!iub'
^
it
EAA Guidance Document Revision: Apn7 2014 C t�
Ouw:
�,� Page 8 of 8 S �a#

%- M N
W 2 19'N
Custom Soil Resource Report
Map —Disposal of Wastewater by Irrigation
s a
300000 W9 MI" 3413W 3416D0 N19W
3
Map Smie: 1:13,900'rfp WmAl3rdsmpe(11"c8.505iee1.
MeRrs
N 0 200_ 400 800 1200
,.- _ iFeet
0 500 1000 2000 3000
Map ppJetm: Web Mamb r Qm omrdiat : WG$34 Edge bs: UTM Zme 18N WGSB4
25
36°2PUN
S
F
�i
36° 331A N
3122W N2500 3428W M3100
3
m

Custom Soil Resource Report
MAP LEGEND
MAP INFORMATION
Area of Interest 1A01) Background
The soil surveys that comprise your AOI were mapped at 1:24,000.
0
Area or Interest (AOq . Aerial Photography
_
Warning: Soil Map may not be valid at this scale.
Soils
Soil Rating
Polygons
F__J
Very limited
Enlargement of maps beyond the scale of mapping can cause
misunderstanding of the detail of mapping and accuracy of soil line
Somewhat limited
placement. The maps do not show the small areas of contrasting
Q
Not limited
soils that could have been shown at a more detailed scale.
Q
Not rated or not available
Please rely on the bar scale on each map sheet for map
Soil Rating
Lines
measurements.
..�
Very limited
«r
Somewhat limited
Source of Map: Natural Resources Conservation Service
Web Soil Survey URL: http:/ANebsoilsuNey.nres.usda.gov
,y
Not limited
Coordinate System: Web Mercator (EPSG:3857)
• .
Not rated or not available
Maps from the Web Soil Survey are based on the Web Mercator
Soil Rating
Points
projection, which preserves direction and shape but distorts
0
Very limited
distance and area. A projection that preserves area, such as the
Albers equal-area conic projection, should be used if more accurate
p
Somewhat limited
calculations of distance or area are required.
Not limited
p
Not rated or not available
This product is generated from the USDA-NRCS certified data as of
the version date(s) listed below.
Water Features
Streams and Canals
Soil Survey Area: Gates County, North Carolina
Transportation
Survey Area Data: Version 10, Sep 13, 2014
ti
Rails
Soil map units are labeled (as space allows) for map scales 1:50,000
N
Interstate Highways
or larger.
.�
US Routes
Dates) aerial images were photographed: Feb 15, 2011—Apr 4,
Major Roads
2011
Local Roads
The orthophoto or other base map on which the soil lines were
compiled and digitized probably differs from the background
imagery displayed on these maps. As a result, some minor shifting

l
J
^
Apendix 10-1 Land Application Alternative
Land Cost
Cost per acre $4,510 according to USDA Farm Real Estate Value by State
Estimated Acres Needed 87 acres
100' buffer 18 acres
Total Acres Required 105 acres
Cost $473,550
Fees and closing costs $14,206.50 assume 3%
Total Land Purchase Cost $487,757
Piping/Pumping Cost
#
Units
Cost/unit
Total Cost
12" Pipe
18"
1000
ft
$40.00
$40,000
10" Pipe
500
ft
$30.00
$15,000
Pipe
500
ft
$20.00
$10,000
6" Pipe
500
ft
$15.00
$7,500
4" Pipe
4500
ft
$12.00
$54,000
Irrigation System
2
ea
$55,000
$110,000
Pumps
1
ea
$300,000
$300,000
Electrical controls
1
ea
$90,000.00
$90,000
Engineering
10% of cost
ea
$0.10
$62,650
Total Piping/Pumping Cost
$689,150
Pond
FConstruction cost $24,000 from Table 2 - NC State Structural Stormwater Best Management Practices
',18" pipe) $6,000.00
Cost $30,000
Total Land and Capital Cost of Land Application $1,206,907

Land Application Alternative - Operation and Maintenance Costs
Pump Station
585,000 gpd
450 gpm
Friction Loss
1 ft per 100 ft
70 feet
Delivery Pressure
60 psi
139 feet
Elevation Head
8 ft
8 feet
Total
217 feet Total Dynamic Head
Pump Efficiency
70°Y
HP Required
33 Horsepower (HP)
KW Required
25 Kilowat (KW)
lower Cost
$0.06 $/kw-hr Duke Energy
lumping Rate
0.908428732 kw-hr/1000 gal
lumping Cost
$0.05 $/1000 gal
lump Cost/day
$31.89 $/day
lump Cost/yr
$11,638.33 $/yr
)&M Pond 600 $/yr from Table 2 - NC State Structural Stormwater Best Management Practices
)perator 10400 $/yr $40/hr - 5 hrs/week
Inalytical Costs
2500 $/yr
lermit Fees
1260 $/yr
;ytem Maintenance
$6,891.S0 $/yr Assume 1% of piping capital Cost
Cost of Property Taxes $3,121.64 $/yr Gates County Tax rate $0.64/$100 valuation
Total O&M Cost $36,411.48 $/yr
Present value Cost Analysis
PV Present Value Costs
Co Costs incurred in present yr $1,206,907
C Costs incurred yearly $36,411.48
n ending life of facilty = 20 20
r current EPA discount rate 0.05

Appendix 10-2 Wastewater Reuse Alternative
Land Cost
Cost per acre $4,510 according to USDA Farm Real Estate Value by State
Estimated Acres Needed 6 acres
100' buffer 3 acres
Total Acres Required 9 acres
Cost $40,590
Fees and closing costs $1,217.70 assume 3%
Total Land Purchase Cost $41,808
Piping/Pumping Cost
#
Units
Cost/unit
Total Cost
12" Pipe
1000
ft
$40.00
$40,000
10" Pipe
500
ft
$30.00
$15,000
8" Pipe
500
ft
$20.00
$10,000
6" Pipe
500
ft
$15.00
$7,500
4" Pipe
500
ft
$12.00
$6,000
Irrigation System
1
ea
$6,000
$6,000
Pumps
1
ea
$100,000
$100,000
Electrical controls
1
ea
$20,000.00
$20,000
Engineering
10% of cost
ea
$0.10
$20,450
Total Piping/Pumping Cost
$224,950
Pond
FConstruction cost $100,000 from Table 2 - NC State Structural Stormwater Best Management Practices
, 18" pipe) $6,000.00
Total Pond Cost $106,000
Total Land and Capital Cost of land Application $372,758

Wastewater Reuste Operation and Maintenance Costs
Pump Station
38,333 gpd
100 gpm
Friction Loss
1 ft per 100 ft
30 feet
Delivery Pressure
60 psi
139 feet
Elevation Head
8 ft
8 feet
Total
177 feet TDH
Pump Efficiency
70%
HP Required
6 HP
KW Required
4 KW
Power Cost
Pumping Rate
Pumping Cost
Pump Cost/day
Pump Cost/yr
O&M Pond
Operator
Analytical Costs
Permit Fees
Svtem Maintenance
of Property Taxes
$0.06 $/kw-hr Duke Energy
0.164661429 kw-hr/1000 gal
$0.01 $/1000 gal
$0.38 $/day
$138.23 $/yr
600 $/yr from Table 2 - NC State Structural Stormwater Best Management Practices
10400 $/yr $40/hr - 5 hrs/week
2500 $/yr
1260 $/yr
$2,249.50 $/yr Assume 1% of piping capital Cost
$267.57 $/yr Gates County Tax rate $0.64/$100 valuation
Total O&M Cost $17,415.30 $/yr
Present Value Cost Analysis
PV
Present Value Costs
Co
Costs incurred in present yr $372,758
C
Costs incurred yearly $17,415.30
n
ending life of facilty = 20 20
r
current EPA discount rate 0.05
PV
$589,790.86

a
t
Appendix 10-3 NPDES Discharge Alternative
Pond
Construction cost $24,000 from Table 2 - NC State Structural Stormwater Best Management Practices
Piping (100', 18" pipe) $6,000.00
Total Pond Cost $30,000
Total Capital Cost of NPDES Discharge $30,000
Operation and Maintenance Costs
F
nd 600 $/yr from Table 2 - NC State Structural Stormwater Best Management Practices
10400 $/yr $40/hr - 5 hrs/week
l Costs 2500 $/yr
es 1260 $/yr
Total O&M Cost $14,760.00 $/yr
FPresentalue Cost Analysis
Present Value Costs
o Costs incurred in present yr
C Costs incurred yearly
n ending life of facilty = 20
r current EPA discount rate
1
$30,000
$14,760.00
20
0.05