NC0088625_PERMIT ISSUANCE_20071126

NPDES DOCYNENT SCANNING COVER SHEET
NPDES Permit:
NC0088625
The Hollows Well # 1 WTP
Document Type:
Permit Issuance
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Correspondence
201 Facilities Plan
Instream Assessment (67B)
Environmental Assessment (EA)
Permit
History
Document Date:
November 26, 2007
This document is printed on reuse paper - igizore m=y
content on the reverse side

Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
u7
1
November 26, 2007
Mr. Gary Moseley
Aqua North Carolina, Inc.
4163 Sinclair Street
Denver, North Carolina 28037
Coleen H. Sullins, Director
Division of Water Quality
Subject: Issuance of NPDES Permit
Permit NCO088625
The Hollows Subdivision Well #1
Sur y County
Dear Mr. Gary:
Division personnel have reviewed and approved your application for new NPDES 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 the Memorandum of Agreement
between North Carolina and the U.S. Environmental Protection Agency dated October 15, 2007 (or as
subsequently amended).
This final permit includes the following changes from the draft permit dated September
26,2007:
➢ The monthly monitoring requirements for fluoride and zinc have been deleted because Aqua
North Carolina, Inc. neither backwashes with fluoridated water nor uses zinc -based additives in
the water treatment process.
➢ The total residual chlorine limit of 17 ug/L will become effective on June 1, 2009. However,
the 2/month monitoring requirement becomes effective on January 1, 2008.
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 Quality or permits required by the Division of Land Resources, the Coastal
Area Management Act or any other Federal or Local governmental permit that may be required.
1Y"ort`n Carolina
dvaturally
North Carolina Division of Water Quality 1617 Mail Service Center Raleigh, NC 27699-1617 Phone [phone] Customer Service
Internet: ww. mcwalemuaiity.org Location: 512 N. Salisbury St. . Raleigh, NC 27604 Fax, [phone] 1-877-623-6748
An Equal Opportunity/Affirmative Action Employer — 50% Recycled110% Post Consumer Paper

If you have any questions concerning this permit, please contact Agyeman Adu-Poku at
telephone number [phone], extension 508.
Sincerely,
9/ G
oleen H. Sullins
cc: Central Files
CNPDES Films
Winston-Salem Regional Office / Surface Water Protection
Horizon Engineering & Consulting, Inc./J. Thurman Horne, P.E.
2510 Walker Road
Mt. Pleasant, NC 28124-8567

Permit NCO088625
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
PERMIT
TO DISCHARGE BACKWASH WASTEWATER FROM GREENSAND FILTERATION WATER
TREATMENT SYSTEM AND SIMILAR WASTEWATERS 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, the
Aqua North Carolina, Inc.
is hereby authorized to discharge wastewater from a facility located at
The Hollows Subdivision —Well #1
Lois Lane, Mt. Airy
Surry County
to receiving waters designated as an unnamed tributary to Stewarts Creek in the Yadkin -Pee Dee River
Basin
in accordance with effluent limitations, monitoring requirements, and other conditions set forth in Parts
I, II and III hereof.
This permit shall become effective January 1, 2008.
This permit and authorization to discharge shall expire at midnight on February 28, 2009.
Signed this day November 26, 2007.
Coleen H. Sullins, Director
Division of Water Quality
By Authority of the Environmental Management Commission

Permit NCO088625
j
SUPPLEMENT TO PERMIT COVER SHEET
The Aqua North Carolina, Inc. is hereby authorized to:
Discharge backwash wastewater from a greensand filtration water treatment system, and similar
wastewaters through outfall 001. This wastewater system is located at the Hollows Subdivision
Well #1, Lois Lane, Mt. Airy in Surry County.
2. Discharge from said outfall at the location specified on the attached map into an unnamed
tributary to Stewarts Creek, classified WS-fV waters in the Yadkin -Pee Dee River Basin.

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The Hollows Subdivision Well #1
Receiving Stream:
UT to Stewart Creek Subbasin:
03-07-03
Drainage Basin:
Yadkin -Pee Dee River Basin Latitude:
36° 29' 47 N
Longitude:
80041' 21" W Permitted Flow:
0.002 MGD
Stream Class:
WS-IV Grid/Ouad:
B 16 NW, Mt. Airy
Facility
Location
vtl�illel.
+not to scale
+t

Permit NC0088625
A. (l.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (001)
During the period beginning on the effective date of the permit and lasting until expiration, the Permittee is
authorized to discharge backwash wastewater from a greensand filtration water treatment system and similar
wastewaters through outfall 001. Such discharges shall be limited and monitored by the Permittee as specified
below:
EFFLUENT
CHARACTERISTICS g
LIMITSr' :
, MONITORING REQUIREMENTS,—'-
„Monthly;
Avera a
.y�:Datly _,";'
Maximum`
Measurement
Frequency!':Location''''
eSample Type'
-•Sample-_
Flow
0.002 MGD
Instantaneous
E
Total Suspended Solids
30.0 mg/L
45.0 mg/L
2/Month
Grab
E
Total Residual Chl9nne
17.6 ug/L
2/Month
Grab
E
Calcium
Monthly
Grab
E
Magnesium
Monthly
Grab
E
Total Iron
Monthly.
Grab
E
Total Manganese
Monthly
Grab
E
PH
2/Month
Grab
E
Footnotes:
1. Sampling locations: E=Effluent.
2. The total residual chlorine (TRC) limit will become effective on June I, 2009. However, 2/month monitoring requirement
becomes effective on January 1, 2008.
3. The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

A
IQr
•
Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
September 26, 2007
Coleen H. Sullins, Director
Division of Water Quality
R ECENED
To: Lee Spencer ^"' °r a"R
NC DENR / DEH / Regional Engineer SEP 2 7 2W7
Winston-Salem Regional Office wnstcn Salam
Ft egionpl'01ftCe_,,,_._,
From: Agyeman Adu-Poku
NPDES Western Program (� D '
I
Subject: Review of Draft NPDES Permit NCO088625 OCT 3 0 2007
The Hollows Subdivision Well# 1
Surry County '
i DEhR • WATER UUALIh f
P01Ni SOURCE BRAgCH
Please indicate below your agency's position or viewpoint on the attached-draft-permit-and---�
return this form by November 2, 2007. If you have any questions on the draft permit,
please contact me at the telephone number or e-mail address listed at the bottom of this
page.
RESPONSE: (Check one)
Concur with the issuance of this permit provided the facility is operated and maintained
properly, the stated effluent limits are met prior to discharge, and the discharge does not
contravene the designated water quality standards.
❑ Concurs with issuance of the above permit, provided the following conditions are met:
❑ Opposes the issuance of the above permit, based on reasons stated below, or attached:
a .
1z W6
//Attachment
. AhC,,mo Ina
tUra�/(��
North Carolina Division of Water Quality 1617 Mail Service Center Raleigh, NC 27699-1617 Phone [phone] Customer Service
Internet: wwW.ncwatcmualilv.org Location: 512 N. Salisbury St. Raleigh, NC 27604 Fax [phone]
An Equal Opportunity/Affirmative Action Employer —50 % Recycled/10 % Post Consumer Paper

Horizon Engineering & Consulting, Inc.
2510 Walker Road
Mt. Pleasant, N.C. 28124-8567
704-788-4455
Cnv InA 100 AAG=
Mr. Ron Berry October 15, 2007
NPDES Group
Division of Water Quality
1617 Mail Service Center
Raleigh, N.C. 27699 - 1617
Subject: Pending NPDES Permits
Existing Well Backwash Discharges
Aqua North Carolina, Inc.
Dear Mr. Berry:
We have received draft permits and proposed final permits for the following facilities:
Facility:
1. Bannertown Hills Well #2
2. Hillcrest
3. The Hollows
4. Stonington
5. Windgate
6. Reeves Woods
Permit Status
Draft received 9/26/07
To be issued effective I I/1/07
Draft received 9/26/07
Draft received 9/26/07
To be issued effective 11/1/07
Draft received 9/26/07
These permits contain monitoring requirements which we believe are excessive, considering the
nature of these facilities, the state's posted guidance for green sand filter discharges (September,
2007) and the results of the raw water sampling data that was submitted for these facilities.
We request that the following revisions be made to the monitoring requirements now listed in
each of the permits:
1. Bannertown Hills Well # 2:
Delete monitoring requirement for Fluoride and zinc
Basis for request: These constituents are not added to these waters and the indicated results
are natural groundwater levels. DENR guidance indicates monitoring is to
be required for facilities that backwash with water that has been
fluoridated or uses zinc -based additives in the water treatment process.
Neither of which is applicable at this facility.

2. Hillcrest :
Delete monitoring requirement for Fluoride and zinc
Basis for request: These constituents are not added to these waters and the indicated results
are natural groundwater levels. DENR guidance indicates monitoring is to
be required for facilities that backwash with water that has been
fluoridated or uses zinc -based additives in the water treatment process.
Neither of which is applicable at this facility.
3. The Hollows
Delete monitoring requirement for Fluoride and zinc
Basis for request: These constituents are not added to these waters and the indicated results
are natural groundwater levels. DENR guidance indicates monitoring is to
be required for facilities that backwash with water that has been
fluoridated or uses zinc -based additives in the water treatment process.
Neither of which is applicable at this facility.
4. Stonington:
Delete monitoring requirement for Fluoride and zinc
Basis for request: These constituents are not added to these waters and the indicated results
are natural groundwater levels. DENR guidance indicates monitoring is to
be required for facilities that backwash with water that has been
fluoridated or uses zinc -based additives in the water treatment process.
Neither of which is applicable at this facility.
Delete monitoring requirement for arsenic, copper, mercury and selenium.
Basis for request: These constituents are not added to these waters and the indicated results
are natural groundwater levels. The results of the analysis for these
samples were extremely low. Low enough that these were "J" flagged by
the laboratory in their report. The "J" flag is explained on page 17 of 18 of
the laboratory report. This explains that, although the constituent was
detected, the result was below the laboratory method reporting limit.
5. Windgate
Delete monitoring requirement for Fluoride and zinc
Basis for request: These constituents are not added to these waters and the indicated results
are natural groundwater levels. DENR guidance indicates monitoring is to
be required for facilities that backwash with water that has been
fluoridated or uses zinc -based additives in the water treatment process.
Neither of which is applicable at this facility.
6. Reeves Woods

Delete monitoring requirement for zinc
Basis for request: These constituents are not added to these waters and the indicated results
are natural groundwater levels. DENR guidance indicates monitoring is to
be required for facilities that backwash with water that has been
fluoridated or uses zinc -based additives in the water treatment process.
Neither of which is applicable at this facility.
Delete monitoring requirement for cyanide, mercury and silver.
Basis for request: These constituents are not added to these waters and the indicated results
are natural groundwater levels. The results of the analysis for these
samples were extremely low. Low enough that these were "U" flagged by
the laboratory in their report. The "U" flag is explained on page 16 of 17
of the laboratory report. This explains that the result was below the
laboratory method detection limit. Therefore, these constituents were not
detected.
In summary, the constituents identified above that are identified in the pending and draft
permits are not added to the waters being discharged and represent levels that are in the
natural groundwaters. Further, many of the constituents are either below the laboratory
detection limits or below the laboratory reporting levels. Such low levels should not warrant
the monitoring proposed and the significant costs associated with the collection and analysis
of these samples.
We appreciate the courtesy you and your staff have afforded us throughout this process and we
hope that you will agree that the above requested changes are appropriate. We will look forward
to hearing from you or your staff regarding these requests at your earliest opportunity. The
permits for Hillcrest and Windgate are scheduled to be effective on November 1, 2007. We hope
that the changes requested for these permits can be handled administratively but, if you advise
that it is necessary, we can file for an adjudicatory hearing.
Again, we appreciate your assistance with these matters. If you need any additional information
or if we need to discuss, I hope that you will call me (704-788-4455.)
Sincerely,
J. Thunman Home, P. E.
C: Gary Moseley
Mike Melton
Dare Kimbrough

Request For Updated Information
Subject: Request For Updated Information
From: Ron Berry <[e-mail]>
Date: Wed, 18 Jul 2007 11:17:13 -0400
To: Thurman Home <[e-mail]>
CC: Gary Moseley <[e-mail]>, Agyeman Adupoku
<Agyeman. Adupoku@ncmai I. n et>
July 18, 2007
Thurman Horne, P.E.
Horizon Engineering & Consulting, Inc.
2510 Walker Road
Mt. Pleasant, NC 28124-8567
Mr. Horne,
Several of the recent applications you submitted for Aqua North Carolina, Inc. will
require additional information to be processed for the required NPDES permit. The
source water information supplied in the applications is incomplete and is not
considered current. In some instances specific request have already been made to
address information issues in several of your applications. This correspondence is
a follow up to the recent phone conversation with Agyeman Adupoku, DENR NPDES
Section, and applies to the new NPDES applications listed:
1) Stonington Subdivision - Well41 NCO088501
2) Hillcrest Subdivision - Well#3 NCO088528
3) Bannertown Hills Subdivision - Well#2 NCO088536
4) Colonial Woods Subdivision - Well#2 NCO088552
5) Windgate Subdivision NCO088609
6) The Hollows Subdivision NCO088625
7) Reeves Woods Subdivision - Well#2 NCO088633
The source water analyzes should not be older than 3 years and should be the most
recent if newer data is available. The following is a list which is available on our
web site of the minimum chemical analyzes that are required for the source water :
'Alkalinity (CaCO3)
Ammonia (as N)
Chlorine (Total Residual, TRC)
Fluoride
Magnesium
Manganese
pH
Temperature
Total Dissolved Solids
Total Kieldahl Nitrogen (TKN)
Total Suspended Solids (TSS)
Nitrate Plus Nitrite Nitrogen
Phosphorus (Total)
Salinity
Turbidity
Antimony
Arsenic
Barium
Beryllium
Cadmium
Calcium
Chromium
Copper
Iron
Mercury
Nickel
Selenium
Silver
Zinc
The permits listed are on hold pending the requested updated source water data. To
move this process forward we need the missing data to be received by DENR Raleigh
NPDES Group no later than September 5, 2007.
If you have any questions you can contact Ron Berry at [phone] x.531 or
[e-mail].
Sincerely,
Ron Berry
NPDES Group
1 of 2 7/18/2007 12:53 PM

Request For Updated Information
cc: Gary Moseley, Aqua North Carolina, Inc.
Agyeman Adupoku, DENR NPDES Section.
2 of 2 7/18/2007 12:53 PM

NORTH CAROLINA
SURRY COUNTY
AFFIDAVIT OF PUBLICATION
Before the undersigned, a Notary Public of said County and State, dilly
commissioned, qualified and authorized by law to administer oaths,
personally appeared Ferris W. Simpson who being first duly
sworn, deposes and says: that he (she) is Business Manager
(Publisher or other officer or employee authorized to make affidavit) of
MOUNT AIRY NEWSPAPERS, INC., engaged in the publication of a
newspaper known as MOUNT AIRY NEWS, published, issued, and
entered as periodicals class mail in the city of Mount Airy in said County
and State; that he (she) is authorized to make this affidavit and sworn
statement; that the notice or other legal advertisement, a true copy of
which is attached hereto, was published in MOUNT AIRY NEWS on the
following dates:
and that the said newspaper in which such notice, paper, document or
legal advertisement was published was, at the time of each and every
such publication, a newspaper meeting all of the requirements and
qualifications of Section 1-597 of the General Statutes of North Carolina
and was a qualified newspaper within the meaning of Section 1-597 of
the General Statutes of North Carolina.
This I U day of Ili 0U f,lA)OP-C 12007
Signature of person. making affidavit
Sworn to and subscribed before me, this I to day of
12(-cmber , 2007
La\q1 at /ly-&
Notary Public
My Commission expires: May 15, 2010 \iColP,,'''
PUBLIC
NOTICE
STATE OF NORTH
CAROLINA
ENVIRONMENTAL
MANAGEMENT
COMMISSION/
NPDES UNIT
1617 MAIL SERVICE
CENTER
RALEIGH,
NORTH CAROLINA
. 27699.1617.
NOTIFICATION OF
INTENT TO ISSUE A
NPDES
WASTEWATER
PERMIT
On the basis of thor-
ough, staff review and
application of NC Gen-
eral Statute 143.21,
Public law 92-500 and
other lawful standards
and regulations, the .
North Carolina Environ-
mental Management.
Commission proposes
to issue a National Pol-
lutant Discharge Elimi-
nation System (NPDES)
wastewater dischargge
permit to .the persons)
listed below effective 45
days from the publish
date of this notice.
Written comments re-
garding the proposed
permit will be accepted
until 30 days. after the
publish date of this no-
tice. All comments re-
ceived prior to that date
are considered in the fi-
nal determinations re-
garding the proposed
permit. The Director of
the NC Division of We-
EQuality may decide
hold a public meeting
! the proposed permit
should the Division re-
ceive a significant de-
gree of public interest.
Copies of the draft per-
mit and other supporting .
I information on the file
used to determine con-
ditions present in the
draft permit are avail-
1 able. upon request and
payment of the costs of
reproduction. Mail com-
ments and/or requests
'for information to the
NC Division of Water
Quality at the above ad.
dress or call the Dina
Sprinkle (919
733-5083, extension
363 at the Point Source
• Branch. Please include
the NPDES permit num-
ber (attached) in any
communication. Inter-
ested persons may also
visit the Division of Wa-
ter Quality at 512 N.
Spbl..N�Cth
libry Street, Ral-
27604-1148
hoursofm. and 5:00 p.m.
w information on
♦I

Carolina, }�
Mt'Airy_
tiasao
Hollows Subdivision
Well #1 in Surry
gallons per dayof
greensand filter` back-
wash water -to an un-
named tributary to
Stewarts Creek within
the' Yadkin -Pee ',Dee
River Basin! Total Sus-
peneded' Solids (TSS)
and total residual chld-
rine are currently -water
Por-
i North
(Town
'tors°tithe
i '' •Hills
Weli#2 in
iunty:': Thin
facility
1600'gal
lons I
Ireehsand fll-
,h. water to
o ,tributary to
rek'withim.the f
'Dee River I
otal: sus
trlirf.F (TRR1 i
tion<- of.
Creek.
Inc. has applied for re-
newal of NPDES permit
NC0088633, for the
Reeves Woods Subdi-
von - Well #2 WTP near
Mount Airy In Surry
County. The facility dis-
charges filter backwash
water to an unnamed
us] chlonne, and pH as
water quality limited -pa-
rameters. This dis-
charge may effect future
allocations in this por-
tion of the Yadkin River
Basing
November10,-2007' _ I

DENR/DWQ
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
NPDES No. NCO088625
Facility Information
Applicant/ Facility
Name:
Aqua North Carolina Inc./The Hollows Subdivision — Well #1
Applicant Address:
4163 Sinclair Street, Denver NC 28037
Facility Address:
Lois Lane, Mt. Airy NC 27030
Permitted Flow
0.002 MGD
Type of Waste:
Greensand filter backwash
Facility/Permit Status:
New
Count
Surry
Miscellaneous
Receiving Stream: UT to Stewarts Creek Regional Office: WSRO
Stream Classification: I WS-1V USGS Topo B 16 NW, Dobson NC
303 d Listed?: No Permit Writer: Agyeman Adu-Poku
Subbasin: 03-07-03 Date: September 26, 2007
Drainage Area mil : N/A
Summer 7Q10 cfs 0
Winter 7Q 10 (cfs): 0
Average Flow cfs : 0
IWC %: 100
Primary SIC Code: 4941
SUMMARY
Aqua North Carolina, Inc. currently owns and operates, an existing well water treatment system serving
The Hollows Subdivision (149 customers). The facility is designed to serve a maximum of 96000 gallons
of potable water per day. This facility uses an assembly of greensand filters in the treatment of
groundwater prior to distribution the Hollows community. These filters are backwashed using potable
water, approximately once every two days. The backwash wastewater is estimated to be 2000 gallons per
day. Aqua North Carolina, Inc. requests the Division to issue NPDES permit to discharge the backwash
wastewater to an unnamed tributary to Stewarts Creek.
The receiving stream (Stewarts Creek) is classified WS-IV waters in the Yadkin -Pee Dee River Basin. This reach is
not listed on the 2006-303(d) list. (Yadkin -Pee Dee River Basinwide Water Quality management Plan, 2006).
PERMITTING STRATEGY
The Division prepared a NPDES permitting strategies for potable water treatment plants (Water Treatment Strategy,
Page 6. Retrieved September 19, 2007,
http7H%N,ww newaterguality or<>/VPDFS/documents/WTPpermittinestrateey07 000 pddf).
The strategy for greensand filtration system will be implemented in this permit.
TOXICITY TESTING:
Current Requirement: N/A
Recommended Requirement: N/A
PROPOSED SCHEDULE FOR PERMIT ISSUANCE:
Draft Permit to Public Notice: 9/26/2007
Permit Scheduled to Issue: 11/19/2007
The Hollows Subdivision — Well 41 Fact Sheet
NPDES New Pennit
Page I

STATE CONTACT:
If you have any questions on any of the above information or on the attached permit, please contact Agyeman Adu-
Poku at [phone] ext. 508
REGIONAL OFFICE COMMENT: This is a new permit application therefore the regional office comments will
be solicited during the public comment period.
NPDES Recommendation by:
Sienature Date
Regional Office Comments
Date
Regional Recommendation by:
Signature
Reviewed and accepted by:
Date
Regional Supervisor:
Signature
Date
NPDES Unit Supervisor:
Signature
The I Io)lows Subdivision — Well # I Fact Sheet
NPDES New Permit
Page 2

IWC Calculations
The Hollows Subdivision Well #1
NC0088625
Prepared By: Agyeman Adu-Poku, NPDES Unit
Enter Design Flow (MGD): 0.002
Enter s7Q10(cfs): 0
Enter w7Q10 (cfs): 0
Residual Chlorine
Ammonia (NH3 as N)
(summer)
7Q10(CFS)
0
7Q10(CFS)
0
DESIGN FLOW (MGD)
0.002
DESIGN FLOW (MGD)
0.002
DESIGN FLOW (CFS)
0.0031
DESIGN FLOW (CFS)
0.0031
STREAM STD (UG/L)
17.0
STREAM STD (MG/L)
1.0
UPS BACKGROUND LEVEL (1
0
UPS BACKGROUND LEVEL
0.22 .
IWC (%)
100.00
IWC (%)
100.00
Allowable Conc. (ug/1)
17
Allowable Conc. (mg/1)
1.0
Ammonia (NH3 as N)
(winter)
7Q10 (CFS)
0
Fecal Limit
200/100mi
DESIGN FLOW (MGD)
0.002
(If DF >331; Monitor)
DESIGN FLOW (CFS)
0.0031
(If DF <331; Limit)
STREAM STD (MG/L)
1.8
Dilution Factor (DF)
1.00
UPS BACKGROUND LEVEL
0.22
IWC (%)
100.00
Allowable Conc. (mg/1)
1.8
Rule of tumb never give small facility <2 ug/L of NH3
Servor/Current Versions/IWC
9121 /2007

cc: CentralTiles
WSRO
NPDES STAFF REPORT AND RECOMMENDATION
APPLICATION # NC0088625
To: Point Source Branch - SWP .,
Attention: Agyeman Adu-Poku
Date: June 28, 2007
County: Surry
PART I -GENERAL INFORMATION
2
3
M
6
7
8
9
Permittee Address: Aqua NC, Inc.
The Hollows Subdivision — Well # 1
4163 Sinclair Street
Denver, NC 28037
Date of Investigation: June 26, 2007
Report Prepared by: Mike Mickey, Environmental Specialist
Persons Contacted and Telephone Number: No one present.
JUL - 3 2007� I
L_-- - --n--J
coins _
5. Directions to Site: The subdivision is located west of Mount Airy. Turn right off ofHwy 89
onto Maple Hollow Road, then left onto Oak Ridge and left again onto Lois Lane. Well #1
for the Hollows Subdivision is located down the gravel drive at the end of Lois Lane.
Discharge Points(s), List for all discharge points:
Latitude: 36' 2T 47" Longitude: 80° 41' 21"
U.S.G.S. Quad No. B-16-NW U.S.G.S. Quad Name: Dobson
Site size and expansion area consistent with application? The well sits on a 1.46 acre lot
owned by Aqua (Parcel 1D # 5000-14-34-4225).
Topography: The well site is approx. 100 yds down a gravel drive at the end of Lois Ln.
Location of nearest dwelling: Several homes are located within 300 ft of the well.

10. Receiving stream or affected surface waters: U.T. to Stewarts Creek.
a. Classification: WS-IV
b. River Basin and Subbasin No.: 03-07-03
C. Describe receiving stream features and pertinent downstream uses: The exact
location of the outfall pipe could not be located in the woods and rhododendron
behind the well house.
Part II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
1. a. Volume of Wastewater to be permitted: The system is backwashed approximately
once every day with an estimated flow of 2,000 GPD.
b. What is the permitted capacity of the well system? The Hollows Subdivision water
system is approved for 67 gpm (maximum yield) by the Public Water Supply Section
and serves 149 customers.
C. Actual treatment capacity of the current facility? See above.
d. Date(s) of AtC's issued in the previous two years. NA.
e. Please provide a description of existing or substantially constructed wastewater
treatment facilities: There is no treatment. The discharge is generated when the
green sand filters (4) are backwashed with potable water.
f. Please provide a description of proposed wastewater treatment facilities. N/A
g. Possible toxic impacts to surface waters: The following chemicals are added:
Potassium Permanganate (for iron and manganese removal), chlorine
(for disinfection) and caustic soda (for pH adjustment).
h. Pretreatment Program (POTWs only): NA
2. Residuals handling and utilization/disposal scheme: None generated.
PART III - OTHER PERTINENT INFORMATION
1. Is this facility being constructed with Construction Grant Funds (municipals only)? NA.
2. Special monitoring or limitations (including toxicity) requests: NA.
3. Important SOC, JOC or Compliance Schedule dates: NA.
NPDES Permit Staff Report
Version 10/92
Page 2

4. Alternative Analysis Evaluation: No other disposal options available for this type of
operation.
PART IV - EVALUATION AND RECOMMENDATIONS
WSRO recommends issuance of the permit for the de minimis discharge created from
backwashing the four green sand filters at Well # 1 serving The Hollows Subdivision.
Report Preparer & D
S P Regional Supervisor & Date
NPDES Permit Staff Report
Version 10/92
Page 3

yTIC
�4 by :1 North Sum.
The Hollows Subdivision
���t�r •., ��,� Well # 1
.I �( ••, f.-� � • I A it /�
If
f 1 1 \
i
Copyright (C) 1998, MaDtech. Inc

Four Potassium
Permanganate
Feed Tanks
(One each to each
green sand filter)
To The Hollows Subdivision Water System
Four Green Sand Filters
(In parallel)
Chlorine &Caustic
Addition
Well Water
The Hollows Subdivision - Well # I
Existing Well System - Process Flow Diagram
Mt. Airy, NC Scale: NTS
Backwash
Discharge to
unnamed tributary
to UT to Stewarts
Creek
Horizon Engineering & Consulting, Inc.
2510 Walker Road
Mt. Pleasant, N.C. 28124 April4, 2007

Surry Co., INC -- Printable Map
http://arcims.webgis.netlnclsurrylprintable.asp?process=id&x2=1503541.35391256&y2=1...
Parcel ID: 5000-14-34-4225
Owner:
HEATER UTILTIES INC
4168 SINCLAIR ST
PO BOX 859
DENVER,NC 280370859
Deed Book: 0736 Pg: 0684
Plat Book: 9 Pg: 41
^----- I- &IA
Parcels
Subdivision: THE HOLLOWS
Township: STEWARTS CREEK
Calculated Acreage:
1.46AC
Building Value:
$0
Outbuildings Value:
$600
Land Value:
$13,200
Deferred Value:
$0
Assessed value:
$13,800
Other Attributes
at point 1503541, 1003798
1 of 2 6/28/2007 4:24 PM

Horizon Engineering & Consulting, Inc.
2510 Walker Road
Mt. Pleasant, N.C. 28124-8567
704-7884455
Fax: [phone]
Ms. Susan Wilson April 4, 2007
Supervisor, Western NPDES Program
Division of Water Quality
NPDES Unit
1617 Mail Service Center - -" ---_-"
Raleigh, N.C. 27699 - 1617 � � n i
Subject: NPDES Permit Application MAY 2 1 2001 U
I
Existing Well Backwash Discharge
Well No. 1
Aqua, North Carolina, Inc. QENR - WATER QUALITY
POINT SOURCE BRANCH
The Hollows Subdivision —
Surry County
Dear Ms. Wilson:
Attached are four (4) copies of the applications for NPDES permit signed by Aqua North
Carolina, Inc., four (4) copies of the Engineering Alternatives Analysis (EAA) and a check for
$ 715 (application fee.) This application is for a permit for the continued discharge of backwash
from existing green sand filters installed on a potable well which serves The Hollows
Subdivision, located outside Mount Airy, N.C. The EAA contains maps, which indicate the
existing location.
This is an existing groundwater well that filters water through a series of green sand filters before
the water is distributed to The Hollows community. The filters are "backwashed" with water
approximately once every day and approximately 2,000 gallons of water is then discharged into
the nearby stream.
This well has been in service for a number of years and we are not aware of any environmental
concerns over this discharge.
We appreciate your consideration of our application for permit. If you have any questions or if
there is anything we need to discuss, please call me (704-788-4455.)
)me, P. E.
C: Tamara S. Taylor
Robert Midgette
Gary Moseley
Michael Melton

NPDES PERMIT APPLICATION - SHORT FORM C - WTP
For discharges associated with water treatment plants
Mail the complete application to:
N. C. Department of Environment and Natural Resources,
Division of Water Quality / NPDES Unit
1617 Mail Service Center, Raleigh, NC 27699-1617�' D LS
NPDES Permit Number 900 MAY 2 1 2007
If you are completing this form in computer use the TAB key or the up - down arrowsL� am
one
to the next. To check the boxes, click your mouse on top of the box. Otherwise, pleaseiprl KT p qu
1. Contact Information:
Owner Name
Aqua North Carolina, Inc.
Facility Name
The Hollows Subdivision - Well # 1
Mailing Address
4163 Sinclair Street
City
Denver
State / Zip Code
NC/28037
Telephone Number
[phone]
Fax Number
[phone]
e-mail Address
[e-mail]
2. Location of facility producing discharge:
Check here if same as
above ❑
Street Address or State Road Lois Lane
City
Mt. Airy
State / Zip Code
NC/27030
County
Surry
3. Operator Information:
Name of the firm, consultant or other entity that operates the facility. (Note that this is not referring to the
Operator in Responsible Charge or ORC)
Name Aqua North Carolina, Inc.
Mailing Address 4163 Sinclair Street
City Denver
State / Zip Code NC/28037
Telephone Number [phone]
Fax Number [phone]
4. Ownership Status:
Federal ❑
State ❑
Private
Public ❑
Page 1 of 3 C-WTP 03/05

NPDES PERMIT APPLICATION - SHORT FORM C - WTP
For discharges associated with water treatment plants
5. Type of treatment plant:
❑ Conventional (Includes coagulation, flocculation, and sedimentation, usually followed by
filtration and disinfection)
❑ Ion Exchange (Sodium Cycle Cationic ion exchange)
® Green Sand Filter (No sodium recharge)
❑ Membrane Technology (RO, nanofiltration)
Check here if the treatment process also uses a water softener ❑
6. Description of source waters) (i.e. groundwater, surface water)
Groundwater well
7. Describe the treatment process(es) for the raw water:
Green sand filtration using potassium permanganate. Chlorine added for disinfection.
Caustic soda added for pH adjustment.
8. Describe the wastewater and the treatment process(es) for wastewater generated by the
facility:
Wastewater discharge is the backwash of the green sand filters. Discharge rate is
approximately 2,000 gallons, once every day.
9. Number of separate discharge points: 1
Outfall Identification number(s) 001
10. Frequency of discharge: Continuous ❑ Intermittent
If intermittent:
Days per week discharge occurs: 3 Duration: approx. 20 min.
11. Plant design potable flowrate 0.096 (Max. well yield) MGD
Backwash or reject flow 0.002 MGD
12. Name of receiving stream(s) (Provide a map showing the exact location of each outfall, including
latitude and longitude):
an unnamed tributary to Stewarts Creek (Yadkin River Basin)
Page 2 of 3 C-WTP 03/05

NPDES PERMIT APPLICATION - SHORT FORM C - WTP
For discharges associated with water treatment plants
13. Please list all water treatment additives, including cleaning chemicals, that have the
potential to be discharged.
potassium permanganate
chlorine
caustic soda
14. Is this facility located on Indian country? (check one)
Yes ❑ No
15. Additional Information:
> Provide a schematic of flow through the facility, include flow volumes at all points in
the treatment process, and point of addition of chemicals.
Solids Handling Plan
16. NEW Applicants
Information needed in addition to items 1-15:
> New applicants must contact the NCDENR Customer Service Center.
Was the Customer Service Center contacted? ® Yes ❑ No
Analyses of source water collected
Engineering Alternative Analysis
Discharges from Ion Exchange and Reverse Osmosis plants shall be evaluated using a
water quality model.
17. Applicant Certification
I certify that I am familiar with the information contained in the application and that to the
best of my knowledge and belief such information is true, complete, and accurate.
Gary Moseley Manager, Western N. C.
Printed name of Person Signing Title
Signature
Date
North Carolina General Statute 143-215.6 (b)(2) provides that: Any person who knowingly makes any false
statement representation, or certification in any application, record, report, plan, or other document files or
required to be maintained under Article 21 or regulations of the Environmental Management Commission
implementing that Article, or who falsifies, tampers with, or knowingly renders inaccurate any recording or
monitoring device or method required to be operated or maintained under Article 21 or regulations of the
Environmental Management Commission implementing that Article, shall be guilty of a misdemeanor punishable
by a fine not to exceed $25,000, or by imprisonment not to exceed six months, or by both. (18 U.S.C. Section
1001 provides a punishment by a fine of not more than $25,000 or imprisonment not more than 5 years, or both,
for a similar offense.)
Page 3 of 3 C-WTP 03/05

Horizon Engineering & Consulting, Inc.
Mr. Macon C. Sammons, Jr.
County Manager
Surry County
118 Hamby Road
Dobson, NC 27017
Subject: Request for Local Government Review
NPDES Permit Applications
Wells No. 1
Existing Well Backwash Discharge
The Hollows Subdivision
Surry County
Dear Mr. Sammons:
2510 Walker Road
Mt. Pleasant, N.C. 28124-8567
704.7884455
Fax: [phone]
April4, 2007
Attached is a copy of an application for permit signed by Aqua North Carolina, Inc. This
application is for a permit for the continued discharge of backwash from filters installed on an
existing potable well which serves the Hollows Subdivision, located outside Mt. Airy off Maple
Hollow Road. I have also attached a map to indicate the existing location.
As part of the application process, the state requires that we notify the local government and ask
that they complete the attached form which indicates whether the local government has a zoning
or subdivision ordinance and whether the continued discharge is consistent with that ordinance.
This is an existing groundwater well that filters water through a series of filters before the water
is distributed to The Hollows community. The filters are "backwashed" with water approximately
once every day and approximately 2,000 gallons of water is then discharged into the nearby
stream.
This well has been in service for a number of years and we are not aware of any environmental
concerns over this discharge, other than that the state has advised that we must apply for a
permit.
As the state has instructed, we are trying to file this application as soon as possible. If you could
complete, sign and return this form, it will be very helpful.
We apologize for the necessity to ask for this assistance but I hope that you can appreciate our
dilemma. If you have any questions or if there is anything we need to discuss, please call me
(704-788-4455.)
S' 6152,
urman Horne, P. E.
C: Gary Moseley
NC DENR

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Existing Wastewater Discharge
Engineering Alternatives Analysis
Aqua North Carolina, Inc.
The Hollows Subdivision Well No. 1
Mt. Airy, N.C.
Surry County
Applicant Aqua North Carolina, Inc.
4163 Sinclair Street
Denver, N.C. 28037
Ph: 704-489-9404
Contact: Gary Moseley
Facility The Hollows Subdivision Well # 1
Aqua North Carolina, Inc.
Lois Lane
Mt. Airy, N.C. 27030
Ph: 704-489-9404
Contact: Gary Moseley
Prepared by:
Date:
J. Thurman Horne, P.E.
Horizon Engineering & Consulting, Inc.
2510 Walker Road
Mt. Pleasant, N.C. 28124
Ph: 704-788-4455
April 4, 2007
6

i
iSection 1: General
'
1.01 Introduction:
Aqua North Carolina, Inc. (Aqua NC) currently owns and operates an existing well
'
water system serving The Hollows Subdivision (Hollows), located northeast of Mt.
Airy, N.C. in Surry County. Well #1 of the water system uses an assembly of four
(4) green sand filters in the treatment of groundwater prior to distribution to the
Hillcrest community. These filters are backwashed, using potable water,
approximately once every day. This backwash is a relatively small volume of
approximately 2,000 gallons. The discharge leaves the well house via a 1-1/2"
PVC pipe which then increases to a 3" PVC pipe, and is released into an
intermittent stream that is an unnamed tributary to Stewarts Creek in the Yadkin
River basin.
1
The well has a good overall history of compliance with water supply regulations,
but is required to obtain an NPDES permit for the continued operation of the
'
existing backwash discharge.
The Hollows water system currently has 149 customers. Well # 1 is approved for
' 67 gpm. No expansion of the capacity of this well is planned and the system is
sufficient to serve the subdivision. Whereas the subdivision is fully developed and
since no expansion of the subdivision or service area is planned, there is no
potential for any substantial population increase to affect the existing rate of water
use or backwash discharge flow (2000 gpd.)
I
Section 2:
1
1
1
The review of this source and the consideration of alternatives is being made with
inclusion of consideration of the guidance contained in 'Permitting Strategy For
Greensand Filtration Water Treatment Plants - January 2004")
1.02 Scope:
The scope of this project is limited to the investigation and evaluation of
alternatives for treating and/or disposing of the existing green sand filter backwash
from Well # 1 at The Hollows Subdivision. This includes consideration of the
feasibility of continuing the existing discharge and options for eliminating the
existing discharge.
Background Information
2.01 Project Area:
The existing service area is limited to The Hollows Subdivision. All homes are
single family residences. There are no commercial or industrial customers. All
wastewater is typical backwash from green sand filters.
The existing discharge coordinates are: Longitude: -80 deg. 41 min. 21 sec. W
1

Latitude: 36 deg. 29 min. 47 sec. N
2.02 Site Characteristics:
The subdivision is located in a rural portion of Surry county, outside any municipal
limits and remote from public water and/or sewer. The nearest existing sewer is
' approximately 4.0 miles away.
The general area has soil characteristics which are limited to the possibility of on
' site treatment and disposal.
Terrain is generally rolling but has been graded level at the existing well site.
' 2.03 Receiving Stream Characteristics:
' The receiving stream is intermittent in nature and is an unnamed tributary to
Stewarts Creek, which is class WS-IV waters. The receiving stream is obviously a
zero flow stream (7Q10 and 30Q2 = 0) but since the wastewater discharge is not
' oxygen consuming, discharge into the zero flow stream should be allowable under
state procedures.
' This receiving stream has no known outstanding features or characteristics that
should preclude the continuation of the existing discharge. There are no known
' endangered or threatened species and these are not threatened or impaired
waters.
Section 3: Existing Utilities
3.01 Public Facilities:
' The nearest existing public sewer is located approximately 4 miles northeast of the
existing well near the junction of NC Highway 89 (West Pine Street) and South
Franklin Road. The distance that would be required for sewer force mains to be
installed would be approximately 21,100 ft. This would be the route that appears to
be the most practical from an engineering perspective to take advantage of
following existing highway right of way and have minimal impact to adjacent
property owners.
The City of Mt. Airy, Public Works Department provides sewer services in this
area. Mr. Mitch Williams, P.E., City Engineer, was consulted and has advised that
there are no established plans for extension of sewer service any closer to The
' Hollows Subdivision within the next ten years or beyond.
3.02 Private Facilities:
' There are no known existing private sewer utilities within any reasonable proximity
of The Hollows Subdivision that would be available for consideration as a possible
1

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alternative. A review of available records did not reveal that there are any private
sewer facilities within a two and one half mile radius.
Section 4: Alternatives For Service
4.01: On site surface and/or subsurface disposal:
Subsurface Disposal:
Appendix E contains portions of soil survey reports that provide insight as to the
suitability of the soils for subsurface disposal. As described in the report, these
soils are mainly Fairview-Woolwine-Westfield soils with characteristics that are
somewhat limited to very limiting with respect to the potential for subsurface
disposal. In addition to researching the information available from NRCS soils
maps, the engineer consulted with Mr. Johnny E. Easter, IRS, Surry County
Environmental Health Director concerning the possibilities of subsurface disposal.
Mr. Easter suggested that, for purposes of evaluating this based on the limited
information available, an application rate of 0.25 gpd/SF would be a reasonable
assumption. Of course, before a final design and/or approval could be given, an
actual on site soils evaluation would be required. For the purposes of evaluating
this as a possible option, a design application rate of 0.25 gpd/SF will be used.
Subsurface disposal requires buffers and land for the drainfields as well as equal
areas of suitable soil, be available and maintained as potential repair/replacement
areas.
Aqua North Carolina only owns a one acre lot around the well. Whereas the well
must have a 100 foot buffer to any disposal site, this would necessitate that Aqua
North Carolina acquire additional property to allow for the possible subsurface
disposal site, repair/reserve area and buffers.
Given the limitations described in the attached soil survey and discussed above, it
is doubtful that this is a viable option. A full and extensive soils investigation of
potential sites would be necessary to confirm if useable areas are available. In
I
keeping with the state guidance for alternatives evaluation, the cost effectiveness
of this alternative is further evaluated to determine if a detailed soils analysis is
appropriate. The costs associated with this option are estimated in Appendix A.
This option would require that the existing discharge be conveyed to an acquired
site having sufficient area for subsurface disposal and a suitable reserve area of
equal size, and that these areas include adequate buffers from property lines,
homes, wells, etc.
' Surface Irrigation:
Disposal by irrigation requires storage capacity for periods of inclement weather
when application is not allowable. Therefore consideration of this as a possible
I

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alternative must also include the provision of storage of the backwash waters
during periods of inclement weather.
As noted earlier, the soil surveys for this area have determined this to have limited
to severely limited potential for on site subsurface disposal. Consideration of this
'
alternative is based on an assumed allowable application rate of 0.20 inches per
week which is based on a typical range of 0.15 to 0.25 inches per week for this
geographic area and the soil conditions generally described in the soils survey.
'
Storage requirements for this area are typically in the range of 45 to 90 days. For
purposes of this assessment, a storage requirement of 60 days will be assumed.
'
Considering the relatively benign nature of the current discharge it is not expected
that any additional treatment would be required for surface application. Although
the additional cost of conveyance and the additional costs for on site disposal
should readily be recognized as a significant cost increase as compared to the
alternative of continued discharge, an estimate of the costs for this alternative is
included in Appendix A for comparison.
The evaluation is based on a very conservative assumption that the nearest
available lands that could be reasonably used would actually be available. A
'
comparison of the costs were made first, using the best (lowest cost) reasonable
assumptions. It would obviously be necessary to perform a more detailed site
'
investigation and ascertain if the property owner would consider allowing these
lands to be acquired for this
purpose.
' 4.02: Wastewater Reuse
Options for reuse of wastewater for this area are essentially nil. Reuse is usually
' associated with non -potable uses such as irrigation. This becomes potentially
more viable if there is a need or outlet for reuse such as irrigation of a golf course.
The volume of this discharge is very low and would have little attraction as a
'
source for recycle purposes. This area does not have a golf course, nor are there
any other viable options for reuse associated with the subdivision or in the
'
surrounding area.
4.03: Surface Water Discharge
'
This is the current method of wastewater disposal. There is no anticipated need to
add any new facilities for additional treatment.
An estimate of the costs for the continuation of this alternative is included in
Appendix A for comparison.
4.04: Combination of Alternatives
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' Alternatives to discharge that may be technologically feasible, such as connection
to the nearest public sewer, subsurface disposal and/or surface irrigation, could
' not be employed in conjunction with the current method of disposal (surface water
discharge) and yield any reduction in total capital or operating expenditures. The
evaluation of alternatives shows that these alternatives are clearly not viable due
to the overwhelming magnitude of associated cost.
Combining one of these alternatives while continuing the periodic discharge, yields
' no reduction in the cost for non -discharge alternatives and merely increases the
overall costs. There would be no reduction in capital costs for any of these
alternatives and the operating costs for combining surface discharge with either of
' the other alternatives would be greater than for any single alternative that might be
selected.
In short, whereas the conclusion that continued surface discharge is the only
viable option due to the overwhelming differential in capital and operating costs,
any addition of an additional alternative would merely make the cost differential
worse.
Section 5: Summary and Conclusions:
As can be seen from a comparison of the net present value of the various
alternatives, there is a wide difference between the cost estimate of the option of
continuing discharge and options to eliminate the discharge.
' Compared to the cost of the next most cost effective and reliable alternative
(subsurface disposal) the estimated Net Present Value is approximately 1,170 %
greater. This represents a difference of $ 999 NPV per customer.
In light of the financial impracticality, it is not necessary to further pursue whether
connection is politically acceptable to the POTW or whether land based disposal
options are workable.
By far, the most practical and cost effective and reasonably practical alternative is
the continued discharge of the relatively benign filter backwash waters.
Section 6: Proposed Wastewater Treatment Facilities:
Based on the findings of this evaluation, it has been concluded that the most
economical and practical alternative is to continue discharge to surface waters.
1
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1. Surface Water Discharge at 2,000 GPD Flow Rate:
Whereas this is the existing method of disposal and considering that no additional
treatment is expected as a consequence of any forthcoming permit, there are no
estimated additional capital costs.
The only anticipated increase in operation and maintenance costs are those associated
with the collection, analysis and reporting of effluent discharge samples as required by an
NPDES permit.
Capital Cost:
Total Capital Cost =
Operation & Maintenance Cost
(Present Value, 20 year life, 5.875% interest):
Annual Cost
Operation & Maintenance
($ 100/mo. X 12 mo/yr)
Total Annual Cost = $ 1,200
PV Annual Cost = $ 13,905
Total Net Present Value = $ 13,905
$ 0.00
$ 1,200

n
2.
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Connection to POTW Sewer System at Junction of NC Hwy 89 and South
Franklin Road :
Install new lift station to collect discharge and convey by force main along existing high
way right of way to junction with existing municipal sewer.
Distance
= approx.
Begin elev.
= approx.
Highest elev.
= approx.
Lift station
Avg. flow =
Peak flow =
21,100 LF
1190.0
1270.0
2,000 gpd = 1.4 gpm
2.5 x 1.4 gpm = 3.5 gpm
Pump Design
Use 1" Sch. 40 PVC, approx. 21,100LF
FH @ 3.5 gpm = 0.92 ft/100 ft = 194.1 ft.
SH = 80 ft (approx.)
Use TDH = 275 ft.
Use dual effluent pumps (rated at 275 ft. TDH at 3.5 gpm) OSI P101012 or approved
equal
Capital Cost:
Item:
Quantity:
Unit Cost:
Cost:
1" force main sewer
21,100 LF
$ 8
$
168,800
Air release
8 Ea.
$ 2,500
$
20,000
Pump Station
1 Ea
$ 45,000
$
45,000
Manholes
1 Ea
$ 1,800
$
1,800
Tap Fee
1 Ea.
$ 3,000
$
3,000
Wastewater Capacity Use Fee 1 Ea.
$ 4,000
$
4,000
Road Crossings
5 Ea
$ 5,000
$
25,000
Creek Crossings
5 Ea
$ 5,000
$
25,000
Metering Station
1 Ea.
$ 30,000
$
30,000
Tie to exist.MH
1Ea
$ 1,000
$
1,000
Erosion control
LS
$ 35,000
$
35,000
Surveying
6 days
$ 1,500
$
9,000
Easement/Right of Way
500 LF
$ 10
$
5,000
Clearing (approx. 1.0 acre)
1.0 acre
$ 6,500
$
6,500
Electrical
LS
$ 7,500
$
7,500
Legal
LS
$ 8,000
$
8,000
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Sub -total $ 394,600
Engineering 15 % 59,190
Total Capital Cost = $ 453,790
Operation & Maintenance Cost:
Local government sewer fee = $ 3.44/1000 Gallons
Annual sewer charges = $ 3.44/1000 Gal x 2,000 gpd x 365 day/yr
_ $ 2,511
Annual electrical charges = $ 200/month X 12 mo/yr = $ 2,400
Annual sample analysis charges = $ 100/mo. X 12 mo/yr = $ 1,200
Annual repair and maintenance = $ 100/mo. X 12 mo/yr = $ 1,200
Total annual costs = $ 7,311
(Present Value, 20 year life, 5.875% interest)
Present Value Annual Cost = $ 84,714
Total Net Present Value = $ 538,504

12
3. Land Based Disposal:
1 3A. Subsurface Disposal:
Based on the soil survey information and the engineers field observations, the soils in this
' area appear to be limited to severely limited as a medium for subsurface disposal. In the
event that it was found to be apparently a cost effective alternative, an in depth site
specific soil investigation would need to be done to confirm that the soils could in fact be
' used. However, for the purpose of comparing the potential alternatives within the scope
of this evaluation, it will be assumed that a typical low design loading rate would be
workable. Therefore, it will be assumed that a loading rate of 0.25 gpd/sq. ft. is
' acceptable.
Therefore, based on the design flow, the area required for subsurface disposal is:
' 2,000 gpd / 0.25 gpd/sq. ft.= 8,000 SF
Whereas it is required to maintain an equal size area as a reserve for future repair, the
required area is 16,000 SF. Appendix D contains a map, which delineates the area that
might be available for subsurface disposal.
'
Assuming a roughly rectangular field (160 ft x 100 ft.
for the initial drain
field plus
repair
and In order to maintain the required buffers to property lines, etc.), the minimum
'
estimated land required is 52,000 SF or 1.2 acres.
'
Capital Cost:
Item: Quantity:
Unit Cost:
Cost:
'
4" sewer drain in T trenches 2,667 LF
$ 12
$
32,004
Site Clearing .6 acre
$ 6,500
$
3,900
Land 1.2 acres
$ 15,000
$
18,000
1" FM 150 LF
$ 8
$
1,200
Pump Station 1 Ea
$ 20,000
$
20,000
Surveying 2 days
$ 1,500
$
3,000
'
Soils Investigation 1 day
$ 1,500
$
1,500
Phase I Environmental Site Assessment LS
$ 2,000
$
2,000
Erosion control LS
$ 5,000
$
5,000
'
Electrical LS
$ 3,000
$
3,000
Legal LS
$ 2,500
$
2,500
Sub -total
$
92,104
Engineering
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1
15%
Total Capital Cost
13,816
$105,920
1

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Operation & Maintenance Cost (Present Value, 20 year life, 5.875 % interest):
Annual Cost
O & M of drain field,
Pump station and force main = $ 2,500/yr $ 2,500
Annual electrical charges = $ 200/month X 12 mo/yr = $ 2,400
Total Annual Cost = $ 4,900
PV Annual Cost = $ 56,778
Total Net Present Value = $ 162,698

14
3B. Surface Irrigation:
Surface irrigation preliminary design is based on an assumed allowable application rate
of 0.20 gpd/sq. ft. and a required storage basin for 60 days design flow. Based on the
design flow of 2,000 gpd, this results in an estimated disposal area of 10,000 SF.
Allowing a recommended 50% repair area, the required total area is 15,000 SF.
Assuming a roughly rectangular field (422.5 ft x 422.5 ft. for the initial spray field plus
repair and in order to maintain the required 150 foot buffer to property lines), the
minimum estimated land required is 178,506 SF or approximately 4.1 acres.
Capital Cost:
Item:
Quantity:
Unit Cost:
Cost:
120,000 gal. storage basin
(1)
$
21,647
Surface irrigation system
10,000 SF
$
0.35
$
3,500
Monitoring wells
4 ea
$
4,000
$
16,000
Land
4.1 acres
$
15,000
$
61,500
Fencing
2,000 LF
$
6.00
$
12,000
Site Clearing
.5 acre
$
6,500
$
3,250
2" FM
3,080 LF
$
8.50
$
26,180
Manholes
1 Ea
$
1,600
$
1,600
Pump Station
1 Ea
$
45,000
$
45,000
Surveying
4 days
$
1,500
$
6,000
Soils Investigation
3 days
$
1,500
$
4,500
Phase I Environmental Site Assessment LS
$
3,000
$
3,000
Erosion control
LS
$
8,000
$
8,000
Electrical
LS
$
5,000
$
5,000
Legal
LS
$
5,000
$
5,000
Sub -total
=
$
222,177
Engineering
15%
33,327
' Total Capital Cost = $ 255,504
(1) Storage:
' Excavation 694 cu. Yds. @ $ 6.00/yd = $ 4,164
Compaction and Lining 4,995 SF @ $ 3.50/SF = $ 17,483
Sub -total = $ 21,647
1
1
1

IS
Operation & Maintenance Cost
(Present Value, 20 year life, 8% interest):
Annual Cost
O & M of spray field,
Pump station and force main = $ 3,500/yr $ 3,500
Annual electrical charges = $ 250/month X 12 mo/yr = $ 3,000
Annual sample analysis charges = $ 100/mo. X 12 mo/yr = $ 1,200
Total Annual Cost = $ 7,700
PV Annual Cost = $ 89,222
Total Net Present Value = $ 344,726

N, I
J
j Wish sch"
4
Exist. Well
Exist Discharge
Longitude:
-80 deg. 41 min. 21 sec. W
Latitude:
36 deg, 29 min. 47 see. N
North
The Hollows Subdivision - Well 9 1 Horizon En_qineerin_q & Consulting, Inc.
USGS Location Map 2510 Walker Road
Mt. Airy, N.C. Scale: V= 1,600' 1 Mt. Pleasant, N.C. 28124 April 4, 2007

4
K � v
b.
CL
ni
Ci
CL
CP
At
11' \ , 1
'
J 5
The Hollows Subdivision - Well # 1 Horizon Engineering & Consulting, Inc.
Possible Route for Connection to POTW 2510 Walker Road
Mt. Pleasant, N.C. 28124 April4, 2007
Mt. Airy, N.C. Scale: V = 2,130'

I
1
II
L
k
r
U
H
n
1
n
1
1
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F
I
The Hollows Subdivision - Well # 1
Possible Location for Subsurface Disposal
North
Horizon Engineering & Consulting, Inc.
2510 Walker Road
Mt. Pleasant, N.C. 28124 April4, 2007
Mt. Airy, N.C. Scale: I" = 90'

I
1
i
1
e
1
I
I
rI
1
I
1
I
1
1
1
1
1
The Hollows Subdivision - well N I Horizon Engineering_ & Consulting Inc.
Possible Location for Surface Disposal 2510 Walker Road
Mt. Pleasant, N.C. 28124 April 4, 2007
Mt. Airy, N.C. Scale: I" = 350'

Sewage Disposal
Surry County, North Carolina
[The information in this table indicates the dominant soil condition but does not eliminate the need for onsite
investigation. The numbers In the value columns range from 0.01 to 1.00. The larger the value, the greater the
potential limitation. The table shows only the top five limitations for any given soil. The soil may have additional
limitations]
Map symbol
and soil name
Arkaqua, undrained
Hatboro, undrained
BbB:
Braddock
BbC:
Braddock
CsA:
Colvard
Suches
of Septic tank absorption fields Sewage lagoons
of
map
unit Rating class and Rating class and
Value ,;,„;,;,,, f-1.,,e� Value
73 Very limited
Flooding
Depth to saturated
zone
Seepage, bottom
layer
Slow water
movement
8 Very limited
Flooding
Ponding
Depth to saturated
zone
Seepage, bottom
layer
Slow water
movement
99 Somewhat limited
Slow water
movement
97 Somewhat limited
Slow water
movement
Slope
49 Very limited
Flooding
Seepage, bottom
layer
39 Very limited
Flooding
Depth to saturated
zone
Seepage, bottom
layer
Slow water
movement
Very limited
1.00 Flooding
1.00 Depth to saturated
zone
1.00 Seepage
0.50
Very limited
1.00 Ponding
1.00 Flooding
1.00 Depth to saturated
zone
1.00 Seepage
0.50
1.00
1.00
1.00
1.00
1.00
1.00
1.00
Somewhat limited
0.50 Seepage 0.98
Slope 0.32
Very limited
0.50 Slope 1.00
Seepage 0.98
0.16
Very limited
1.00 Flooding 1.00
1.00 Seepage 1.00
Very limited
1.00 Flooding 1.00
1.00 Depth to saturated 1.00
zone
1.00 Seepage 1.00
0.50
USDA Natural Resources Tabular Data Version: 9
Conservation Service Tabular Data Version Date: 03/08/2007 Page 1 of 7

Sewage Disposal
Surry County, North Carolina
Pot. I Sepllc lank absorption gelds Sewage lagoons
Map symbol of
and soil name map r
unit I Rating class and Rating class and
Value Value
DeF:
Devotion, very rocky
32
Very limited
Very limited
Slope
1.00
Depth to soft bedrock
1.00
Depth to bedrock
1.00
Slope
1.00
Seepage, bottom
1.00
Seepage
1.00
layer
Depth to hard
0.84
bedrock
Rhodhiss, very rocky
26
Very limited
Very limited
Slope
1.00
Slope
1.00
Seepage. bottom
1.00
Seepage
1.00
layer
Slow water
0.50
movement
Bannertown, very rocky
21
Very limited
Very limited
Slope
1.00
Depth to hard
1.00
Depth to bedrock
1.00
bedrock
Seepage, bottom
1.00
Depth to soft bedrock
1.00
layer
Slope
1.00
Seepage
1.00
Rhodhiss, deep
8
Very limited
Very limited
Slope
1.00
Slope
1.00
Seepage, bottom
1.00
Seepage
1.00
layer
Depth to soft bedrock
0.61
Depth to bedrock
0.86
Slow water
0.50
movement
Rock outcrop
5
Not rated
Not rated
FeB2:
Fairview, moderately eroded
83
Somewhat limited
Somewhat limited
Slow water
0.60
Seepage
0.98
movement
Slope
0.32
FeC2
Fairview, moderately eroded 78
Somewhat limited
Very limited
Slow water
0.50
Slope
1.00
movement
Seepage
0.98
Slope
0.37
Woolwine, moderately eroded 10
Very limited
Very limited
Depth to bedrock
1.00
Depth to soft bedrock
1.00
Slope
0.63
Slope
1.00
Slow water
0.50
Seepage
0.50
movement
USDA Natural Resources
Tabular Data
Version: 9
Conservation Service
Tabular Data Version
Date: 03/08/2007 Page 2 of 7

1
1
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1
Sewage Disposal
Suny County, North Carolina
Map symbol
and soil name
Pct.
of
map
unit
Septic tank absorption fields
Sewage lagoons
Rating class and
Value
Rating class and
Value
limiting features
limiting features
FeC2:
Westfield, moderately eroded 7
Somewhat limited
Very limited
Depth to bedrock
0.86
Slope
1.00
Slope
0.63
Seepage
0.98
Slow water
0.50
Depth to soft bedrock
0.61
movement
FeD2:
Fairview, moderately eroded
72
Very limited
Very limited
Slope
1.00
Slope
1.00
Slow water
0.50
Seepage
0.98
movement
Woolwine, moderately eroded
13
Very limited
Very limited
Slope
1.00
Depth to soft bedrock
1.00
Depth to bedrock
1.00
Slope
1.00
Slow water
0.50
Seepage
0.50
movement
Westfield
5
Very limited
Very limited
Slope
1.00
Slope
1.00
Depth to bedrock
0.86
Seepage
0.98
Slow water
0.50
Depth to soft bedrock
0.61
movement
FsE:
Fairview
60
Very limited
Very limited
Slope
1.00
Slope
1.00
Slow water
0.50
Seepage
0.98
movement
Stott Knob
28
Very limited
Very limited
Slope
1.00
Depth to soft bedrock
1.00
Depth to bedrock
1.00
Slope
1.00
Seepage, bottom
1.00
Seepage
1.00
layer
Depth to hard
0.71
Slow water
0.50
bedrock
movement
Arkaqua, undrained
5
Very limited
Very limited
Flooding
1.00
Flooding
1.00
Depth to saturated
1.00
Depth to saturated
1.00
zone
zone
Seepage, bottom
1.00
Seepage
1.00
layer
Slow water
0.50
movement
USDA Natural Resources Tabular Data Version: 9
Conservation Service Tabular Data Version Date: 03/08/2007 Page 3 of 7

Sewage Disposal
Suny County, North Carolina
Map symbol
and soil name
Pa.
of
map
unit
Septic tank absorptioHfields
Sewage lagoons
Rating Gass andRating
class and
Value
imiting features
limitin features
FuB2:
Fairview, moderately eroded
57
Somewhat limited
Somewhat limited
Slow water
0.50
Seepage
0.98
movement
Slope
0.32
Urban land
31
Not rated
Not rated
Westfield, moderately eroded
6
Somewhat limited
Somewhat limited
Depth to bedrock
0.86
Seepage
0.98
Slow water
0.50
Slope
0.68
movement
Depth to soft bedrock
0.61
Woolwine, moderately eroded
5
Very limited
Very limited
Depth to bedrock
1.00
Depth to soft bedrock
1.00
Slow water
0.50
Slope
0.68
movement
Seepage
0.50
• FuC2:
Fairview, moderately eroded
54
Somewhat limited
Very limited
Slope
0.63
Slope
1.00
Slow water
0.50
Seepage
0.98
movement
Urban land
31
Not rated
Not rated
Westfield, moderately eroded
5
Somewhat limited
Very limited
Depth to bedrock
0.86
Slope
1.00
Slope
0.63
Seepage
0.98
Slow water
0.50
Depth to soft bedrock
0.61
movement
Wootwine, moderately eroded
5
Very limited
Very limited
Depth to bedrock
1.00
Depth to soft bedrock
1.00
Slope
0.63
Slope
1.00
Slow water
0.50
Seepage
0.50
movement
WfC2:
Woolwine, moderately eroded
50
Very limited
Very limited
Depth to bedrock
1.00 Depth to soft bedrock 1.00
Slope
0.63 Slope
1.00
Slow water
0.50 Seepage
0.50
movement
Fairview, moderately eroded
32
Somewhat limited
Very limited
Slope
0.63 Slope
1.00
Slow water
0.50 Seepage
0.98
movement
USDA Natural Resources Tabular Data Version: 9
Conservation Service Tabular Data Version Date: 03/08/2007 Page 4 of 7

Sewage Disposal
Suny County, North Carolina
Map symbol
and soil name
Pct.
of
map
unit
Septic tank absorption fields
Sewage lagoons
Rating class and
Value
Rating class and
Value
limiting features
limiting features
WtC2:
Westfield, moderately eroded
13
Somewhat limited
Very limited
Depth to bedrock
0.86
Slope
1.00
Slope
0.63
Seepage
0.98
Slow water
0.50
Depth to soft bedrock
0.61
movement
Woo
Woolwine, stony 53
Very limited
Very limited
Slope
1.00
Depth to soft bedrock
1.00
Depth to bedrock
1.00
Slope
1.00
Slow water
0.50
Seepage
0.50
movement
Fairview, stony 26
Very limited
Very limited
Slope
1.00
Slope
1.00
Slow water
0.50
Seepage
0.98
movement
Westfield, stony 13
Very limited
Very limited
Slope
1.00
Slope
1.00
Depth to bedrock
0.86
Seepage
0.98
Slow water
0.50
Depth to soft bedrock
0.61
movement
Meadowfield, stony 8
Very limited
Very limited
Slope
1.00
Depth to hard
1.00
Depth to bedrock
1.00
bedrock
Slow water
0.02
Slope
1.00
movement
Seepage
0.98
WoE:
Woolwine, stony 47
Very limited
Very limited
Slope
1.00
Depth to soft bedrock
1.00
Depth to bedrock
1.00
Slope
1.00
Slow water
0.50
Seepage
0.50
movement
Fairview, stony 24
Very limited
Very limited
Slope
1.00
Slope
1.00
Slow water
0.50
Seepage
0.98
movement
Westfield, stony 10
Very limited
Very limited
Slope
1.00
Slope
1.00
Depth to bedrock
0.86
Seepage
0.98
Slow water
0.50
Depth to soft bedrock
0.61
movement
USDA Natural Resources
Conservation Service
Tabular Data
Version: 9
Tabular Data Version
Dale: 03/08/2007
Page
5 of 7

1
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1
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Sewage Disposal
Surry County, North Carolina
Map symbol
and soil name
Pct.
of
map
unit
I Septic tank absorption fields
Sewage lagoons
Rating class and
Value
Rating class and
Value
limiting features
limiting features
IoE:
Meadowfield, stony 6
Very limited
Very limited
Slope
1.00
Depth to hard
1.00
Depth to bedrock
1.00
bedrock
Slow water
0.02
Slope
1.00
movement
Seepage
0.98
USDA Natural Resources Tabular Data Version: 9
Conservation Service Tabular Data Version Dale: 03/08/2007 Page 6 of 7

•
Sewage Disposal
This table shows the degree and kind of soil limitations that affect septic tank absorption fields and sewage
both verbal and numerical. Rating class terms indicate the extent to which the soils are
lagoons. The ratings are
limited by all of the soil features that affect these uses. "Not limited" Indicates that the soil has features that are very
favorable for the specified use. Good performance and very low maintenance can be expected. "Somewhat limited'
indicates that the soil has features that are moderately favorable for the specified use. The limitations can be
overcome or minimized by special planning, design, or installation. Fair performance and moderate maintenance
can be expected. "Very limited' indicates that the soil has one or more features that are unfavorable for the
specified use. The limitations generally cannot be overcome without major soil reclamation, special design, or
'
expensive installation procedures. Poor performance and high maintenance can be expected.
Numerical ratings in the table indicate the severity of individual limitations. The ratings are shown as declmal
fractions ranging from 0.01 to 1.00. They indicate gradations between the point at which a soil feature has the
greatest negative impact on the use (1.00) and the point at which the soil feature is not a limitation (0.00).
'
"Septic tank absorption fields" are areas in which effluent from a septic tank is distributed into the soil through
subsurface tiles or perforated pipe. Only that part of the soil between depths of 24 and 72 Inches or between a
depth of 24 Inches and a restrictive layer is evaluated. The ratings are based on the soil properties that affect
absorption of the effluent, construction and maintenance of the system, and public health. Saturated hydraulic
conductivity (Ksat), depth to a water table, ponding, depth to bedrock or a cemented pan, and flooding affect
absorption of the effluent. Stones and boulders, ice, and bedrock or a cemented pan interfere with Installation.
Subsidence interferes with Installation and maintenance. Excessive slope may cause lateral seepage and surfacing
of the effluent in downslope areas.
Some soils are underlain by loose sand and gravel or fractured bedrock at a depth of less than 4 feet below the
distribution lines. In these soils the absorption field may not adequately filter the effluent, particularly when the
system Is new. As a result, the ground water may become contaminated.
'
"Sewage lagoons" are shallow ponds constructed to hold sewage while aerobic bacteria decompose the solid
of
and liquid wastes. Lagoons should have a nearly level floor surrounded by cut slopes or embankments
compacted soil. Nearly Impervious soil material for the lagoon floor and sides is required to minimize seepage and
contamination of ground water. Considered In the ratings are slope, saturated hydraulic conductivity (Ksat), depth
'
to a water table, ponding, depth to bedrock or a cemented pan, flooding, large stones, and content of organic
matter.
Saturated hydraulic conductivity (Ksat) is a critical property affecting the suitability for sewage lagoons. Most
porous soils eventually become sealed when they are used as sites for sewage lagoons. Until sealing occurs,
however, the hazard of pollution is severe. Soils that have a Ksat rate of more than 14 micrometers per second are
too porous for the proper functioning of sewage lagoons. In these soils, seepage of the effluent can result in
contamination of the ground water. Ground -water contamination is also a hazard If fractured bedrock is within a
depth of 40 inches, if the water table is high enough to raise the level of sewage in the lagoon, or if floodwater
'
ovenops the lagoon.
A high content of organic matter is detrimental to proper functioning of the lagoon because It inhibits aerobic
activity. Slope, bedrock, and cemented pans can cause construction problems, and large stones can hinder
compaction of the lagoon floor. If the lagoon is to be uniformly deep throughout, the slope must be gentle enough
'
and the soil material must be thick enough over bedrock or a cemented pan to make land smoothing practical.
Information in this table Is intended for land use planning, for evaluating land use altematives, and for planning
site investigations prior to design and construction. The Information, however, has limitations. For example,
estimates and other data generally apply only to that part of the soil between the surface and a depth of 5 to 7 feet.
Because of the map scale, small areas of different soils may be included within the mapped areas of a specific soil.
The Information is not site specific and does not eliminate the need for onslte investigation of the soils or for
testing and analysis by personnel experienced in the design and construction of engineering works.
Government ordinances and regulations that restrict certain land uses or impose specific design criteria were
not considered in preparing the information in this table. Local ordinances and regulations should be considered in
planning, in site selection, and in design.
1
USDA Natural Resources Tabular Data Version: 9
Conservation Service Tabular Data Version Date: 03/0812007 Page 7 of 7

Four Potassium
Permanganate
Feed Tanks
(One each to each
green sand filter)
To The Hollows Subdivision Water System
Four Green Sand Filters
(In parallel)
Chlorine &Caustic
Addition
Well Water
Backwash
Discharge to
unnamed tributary
to UT to Stewarts
Creek
The Hollows Subdivision - Well # 1 Horizon Engineering & Consulting, Inc.
Existing Well System - Process Flow Diagram 2510 Walker Road
Mt. Pleasant, N.C. 28124 April 4, 2007
Mt. Airy, NC Scale: NTS

24
1
Residuals Management Plan
Prepared by: J. Thurman Horne, P.E.
Horizon Engineering & Consulting, Inc.
iResiduals Management Plan:
' The proposed continued surface water discharge will have no impact on existing residuals management.
There are no wastewater treatment facilities.
' The nature of the operation (backwashing of green sand filters) is such that only minor amounts of solids
(less than 30 mg/1) are released with the discharge.
' There is no generation of any grits, sludges or residuals for removal or disposal.
' This project does not increase or alter the amounts of sludge produced or impact the current methods of
disposition.
1
1