NC0084425_Permit (Issuance)_20091102

NPDES DOCUMENT SCANNING: COVER SHEET
NPDES Permit:
NC0084425
Davidson Water WTP
Document Type:
Permit Issuance
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Complete File
- Historical
Engineering Alternatives (EAA)
Staff Report
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Permit
History
Document Date:
November 2, 2009
This document is printed on reuse paper - ignore nay
content Cori the reYerse side

Beverly Eaves Perdue
Governor
Mr. Gregg Stabler
Davidson Water, Inc.
P. O. Box 969
Welcome, NC 27374-0969
Zia
NCDENR.
• North Carolina Department of Environment and Natural Resources
Division of Water Quality
Coleen H. Sullins Dee Freeman
Director Secretary
November 2, 2009
Subject: Issuance of NPDES Permit NC0084425
Davidson Water, Inc. — Davidson Water WTP
Davidson County
Dear Mr. Stabler:
Division personnel have reviewed and approved your application for renewal 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 the Memorandum of Agreement
between North Carolina and the U.S. Environmental Protection Agency dated May 9, 1994 (or as
subsequently amended).
The terms included in this final permit are considerably different from those found in draft permit sent to
you on July 15, 2009. Since that time, this office has reevaluated its guidance for the permitting of
wastewater discharges from conventional water treatment plants. The results of that reevaluation are
included in the permit. While some parameters have been removed from the list of those to be
monitored and others have been added, the overall effect of these changes is believed to impose less of a
regulatory burden to the permittee. We would like to thank Mr. Ron Farnsworth of your staff for his
assistance and persistence during the permitting process.
The changes between this final permit and the original draft were described in an October 15, 2009 e-
mail from Bob Sledge of our staff to you and Mr. Farnsworth. Changes in this final version include:
• The flow limit has been removed. The monitoring requirement for flow has been changed from
weekly, instantaneous measurement to continuous flow monitoring, based upon a more complete
understanding of the WTP's operations. However, the requirement for continuous flow monitoring
of the effluent will not become effective until March 1, 2011. This should allow the Town time for
planning, budgeting and installation of an adequate flow measurement device.
• Monitoring for Calcium and Magnesium have been eliminated from the permit. Monitoring for
ammonia nitrogen has been removed because the WTP does not use chloramines.
1617 Mail Service Center, Raleigh, North Carolina 27699-1617
Location: 512 N. Salisbury St. Raleigh, North Carolina 27604
Phone: [phone]\ FAX: [phone] Customer Service: 1-877.623-6748
Internet www.ncwaterquality.org
An Equal opportunity 1 Affirmative Action Employer
Non�thCarolina
aurally

Mr. Gregg Stabler
NC0084425 Permit Renewal
p. 2
• Monitoring for Turbidity has been reestablished as a term of the permit, but monitoring of the
effluent (as opposed to instream monitoring) is now to be performed.
• Monitoring for most constituent parameters has been reduced to quarterly.
• Quarterly monitoring for Total Nitrogen and Total Phosphorous have been added to the permit.
• Footnote 3 from the draft permit has been removed. There is no explicit provision within this permit
to have monitoring for particular parameters reduced or removed during the life of the permit based
upon submittal of data from the discharge. Such modification may be requested, but would be
deemed a major modification of the permit and subject to (currently) a $260.00 modification fee.
Otherwise, monitoring frequencies shall remain the same through the full term of the permit. At the
time of the next permit renewal, monitoring parameters, frequencies and limits could be changed
(added, reduced or eliminated) based upon results of sampling during this permit cycle.
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.
If you have any questions concerning this permit, please contact Bob Sledge at telephone number (919)
807-6398 or via e-mail at [e-mail].
Sincerely,
Coleen H. Sullins
cc: Central Files
NPDES Unit
ec: Winston-Salem Regional Office/Surface Water Protection Section
Aquatic Toxicology Unit
Technical Assistance and Certification Unit
A

Permit NC0084425
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provisions 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,
Davidson Water, Inc.
is hereby authorized to discharge wastewater from a facility located at the
Davidson Water WTP
388 Koontz Road
Lexington
Davidson County
to receiving waters designated as an unnamed tributary to the Yadkin River in the Yadkin -Pee Dee
River Basin in accordance with effluent limitations, monitoring requirements, and other conditions set
forth in Parts I, II, III and IV hereof.
This permit shall become effective December 1, 2009.
This permit and authorization to discharge shall expire at midnight on May 31, 2014.
Signed this. day November 2, 2009.
f
Coleen H. Sullins, Director
Division of Water Quality
By Authority of the Environmental Management Commission

Permit NC0084425
SUPPLEMENT TO PERMIT COVER SHEET
All previous NPDES Permits issued to this facility, whether for.operation or discharge are hereby
revoked. As of this permit issuance, any previously issued permit bearing this number is no longer
effective. Therefore, the exclusive authority to operate and discharge from this facility arises under the
permit conditions, requirements, terms, and provisions included herein.
Davidson Water, Inc.
is hereby authorized to:
1. Continue to operate an existing wastewater treatment facility consisting of the following
components:
• Two 335,000 gallon wash water ponds
• Two vacuum sludge drying beds
• Dechlorination
This facility is located at the Davidson Water WTP, off Koontz Road, near Lexington in Davidson
County.
2. Discharge from said treatment works at the location specified on the attached map into an unnamed
tributary to the Yadkin River, currently classified WS-IV CA waters in the Yadkin -Pee Dee River
Basin.

. Permit NC0084425
Latitude: 35°51'08"
Longitude: 80°23'05"
Quad# DI7SW
Receiving Stream: UT Yadkin River
Stream Class: WS-IV CA
Subbasin: 30704
NC0084425
Davidson Water, Inc.
WTP
SCALE 1:24000

Permit NC0084425
A. (1) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
During the period beginning on the effective date of this permit and lasting until expiration, the
Permittee is authorized to discharge from outfall 001. Such discharges shall be limited and monitored
by the Permittee as specified below:
EFFLUENT ='
CHARACTERISTIC
LIMITS
MONITORING REQUIREMENTS :. ,.p
:Monthly
Average
_.. Daily :.
Maximum
; t Measurement -
` - Frequency
Sample Type :
Sample Location
Flow
Weekly
Instantaneous'
Effluent
Flow
Continuous'
Effluent
Total Suspended Solids
30.0 mg/L
45.0 mg/L
2/Month
Grab
Effluent
Total Residual Chlorine2
17 jrg/L
2/Month
Grab
Effluent
pH3
2/Month
Grab
Effluent
Turbidity
2/Month
Grab
Effluent
Aluminum
•
Quarterly4
Grab
Effluent
Manganese
Quarterly4
Grab
Effluent
Fluoride
Quarterly4
Grab
Effluent
Total Zinc
Quarterly4
Grab
Effluent
Total Copper
Quarterly4
Grab
Effluent
Total Iron
Quarterly4
Grab
Effluent
Total Nitrogen
Quarterly4
Grab
Effluent •
Total Phosphorous
Quarterly4
Grab
Effluent •
Whole Effluent Toxicity5
Quarterly
Grab
Effluent .
Footnotes:
1. The requirement for continuous flow monitoring will become effective on March 1, 2011.
Until that date, flow monitoring shall be conducted on a weekly basis, using instantaneous
sampling methods.
2. The Division shall consider all effluent TRC values reported below 50 µg/L to be in compliance
with the permit. However, the Permittee shall continue to record and submit all values reported by
a North Carolina certified laboratory (including field certified), even if these values fall below 50
µme•
3. The pH shall not be less than 6.0 standard units, nor greater than 9.0 standard units.
4. Monitoring should be performed in conjunction with toxicity testing.
5. See Condition A. (2.) for toxicity testing requirements. Toxicity sampling should coincide with
sampling for parameters covered by footnote 4.
All samples collected should be of a representative discharge.
There shall be no floating solids or foam in other than trace amounts.

Permit NC0084425
A. (2.) CHRONIC TOXICITY MONITORING (QUARTERLY)
The permittee shall conduct quarterly chronic toxicity tests using test procedures outlined in the "North
Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure," Revised February 1998, or subsequent
versions.
The effluent concentration defined as treatment two in the procedure document is 90 %. The testing
shall be performed as a Ceriodaphnia dubia 7day pass/fail test. The tests will be performed during
the months of February, May, August and November. Effluent sampling for this testing shall be
performed at the NPDES permitted final effluent discharge below all treatment processes.
All toxicity testing results required as part of this permit condition will be entered on the Effluent
Discharge Monitoring Form (MR-1) for the month in which it was performed, using the parameter
code TGP3B. Additionally, DWQ Form AT-1 (original) is to be sent to the following address:
Attention: NC DENR / DWQ / Environmental Sciences Section
1621 Mail Service Center
Raleigh, N.C. 27699-1621
Completed Aquatic Toxicity Test Forms shall be filed with the Environmental Sciences Section no
later than 30 days after the end of the reporting period for which the report is made.
Test data shall be complete and accurate and include all supporting chemical/physical measurements
performed in association with the toxicity tests, as well as all dose/response data. Total residual
chlorine of the effluent toxicity sample must be measured and reported if chlorine is employed for
disinfection of the waste stream.
Should there be no discharge of flow from the facility during a month in which toxicity monitoring is
required, the permittee will complete the information located at the top of the aquatic toxicity (AT) test
form indicating the facility name, permit number, pipe number, county, and the month/year of the
report with the notation of "No Flow" in the comment area of the form. The report shall be submitted
to the Environmental Sciences Section at the address cited above.
Should the permittee fail to monitor during a month in which toxicity monitoring is required, then
monthly monitoring will begin immediately. Upon submission of a valid test, this monthly test
requirement will revert to quarterly in the months specified above.
Should any test data from this monitoring requirement or tests performed by the North Carolina
Division of Water Quality indicate potential impacts to the receiving stream, this permit may be re-
opened and modified to include alternate monitoring requirements or limits.
If the Permittee monitors any pollutant more frequently then required by this permit, the results of such
monitoring shall be included in the calculation & reporting of the data submitted on the DMR & all AT
Forms submitted.
NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control
organism survival, minimum control organism reproduction, and appropriate environmental controls,
shall constitute an invalid test and will require immediate follow-up testing to be completed no later
than the last day of the month following the month of the initial monitoring.

From: Ron Farnsworth [mailto:[e-mail]]
Sent: Thursday, October 29, 2009 12:11 PM
To: Sledge, Bob
Subject: NPDES Permit
Bob it looks like the Modified version will work as far as everyone here is concerned. So I guess you can put us on your list.
Thanks
pnald Farnsworth
Plant Supt. Davidson Water Inc.
388 Koontz Rd.
Lexington, NC 27295
Ph: 336.731.5570
Cell: 336.248.7691
Email: [e-mail]
Let me check with all those involved and I will get back to you shortly. Everyone so far has had no problem with it but I want
to be sure.
Thanks
RpnattFarnsworth
Plant Supt. Davidson Water Inc.
388 Koontz Rd.
Lexington, NC 27295
Ph: 336.731.5570
Cell: 336.248.7691
Email: [e-mail]
Original Message
From: Sledge, Bob [mailto:[e-mail]]
Sent: Wednesday, October 28, 2009 12:05 PM
To: Ron Farnsworth
Subject: RE: Davidson Water Inc. WTP NPDES Permit Renewal
f y'all are ok with the new set of requirements, 1 can prepare the permit to go out late this week or early next week. Either way, the
effective date of the permit would be December 1.
Bob
From: Ron Farnsworth[mailto:[e-mail]]
Sent: Wednesday, October 28, 2009 12:01 PM
To: Sledge, Bob
Subject: RE: Davidson Water Inc. WTP NPDES Permit Renewal
Bob is there an estimate as to when this monitoring schedule will take effect?
ppndiFarnsworth
Plant Supt. Davidson Water Inc.
388 Koontz Rd.
Lexington, NC 27295
Ph: 336.731.5570
Cell: 336.248.7691
Email: [e-mail]
Original Message
From: Sledge, Bob [mailto:[e-mail]]
Sent: Thursday, October 15, 2009 8:18 AM
To: Ron Farnsworth; Gregg Stabler
Subject: Davidson Water Inc. WTP NPDES Permit Renewal

Hello Mr. Farnsworth & Mr. Stabler,
I'm sorry it's taken so long to bring about more movement on the issuance of this permit. There has been a good deal of
reevaluation of our current permitting strategy for WTPs over the past few months. Those who have conducted the review
will soon issue a modified strategy to our staff for development of new permits. Because of the incomplete status of some
of the permit renewals I'm handling, I've been authorized to offer the terms of the modified strategy to those permittees.
While there may be parts of this strategy that some people will remain dissatisfied with, I believe that overall, it is an
improvement from what we were using in the past.
Please be advised that for the combined sake of consistency and management of the workload in this office, I can offer you
essentially the terms you saw in the draft permit, or those noted within this draft version of a modified permitting strategy
for conventional water treatment plant discharges. Changes within the new strategy include:
The new strategy contains no flow limit. However, flow -based monitoring requirements and limits will be determined
through reexamination of flow data already provided.
Monitoring for most constituent parameters will be quarterly.
Monitoring requirements for Calcium and Magnesium have been eliminated.
Turbidity is reestablished as a monitored parameter (as it is in the current permit).
There is no explicit provision under this strategy to have monitoring for particular parameters reduced or removed during
the life of the permit based upon submittal of data from the discharge. Such modification may be requested, but would be
deemed a major modification of the permit and subject to a $260.00 modification fee. Otherwise, monitoring frequencies
shall remain the same through the full term of the permit. At the time of the next permit renewal, monitoring parameters,
frequencies and limits could be changed (added, reduced or eliminated) based upon results of sampling during this permit
cycle.
A copy of a proposed monitoring and limits page for the permit is attached. Please note for your particular permit that
effluent monitoring for Total Nitrogen and Total Phosphorous have been added. These parameters were not included in
the draft permit due to an omission on my part. Monitoring for these parameters would have to be included in either
version you would choose.
Under either version, the flow limit will be removed. However, the requirement for continuous flow monitoring will
remain. To allow you time to budget, plan, and install an adequate flow meter, this requirement will not take effect until
March 1, 2011.
It would appear to me that the new strategy option would be the better deal for most WTPs. If you would like to talk about
it, please give me a call or reply to this e-mail. I will be in the office until 11:30am this morning and until 2:30pm
tomorrow (Friday).
Thank you for your patience.
Bob
Bob Sledge
Environmental Specialist
NPDES Western Unit
NC Division of Water Quality
[e-mail]
[phone]
E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be
disclosed to third parties.

kVA,
NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue Coleen H. Sullins
Governor Director
MEMORANDUM
To:
From:
July 15, 2009
Lee Spencer
NC DENR / DEH / Regional Engineer
Winston-Salem Regional Office
Bob Sledge
NPDES Unit
Subject: Review of Draft NPDES Permit NC0084425
Davidson Water, Inc. WTP
Davidson County
RECEIVED
N.C. Deot. of ENR
JUL 16 2009
Winstan•Salem
Rogicnal Office
Dee Freeman
Secretary
RECEIVED
3 �n
DENR - WATER DUALITY
POINT SOURCE BRANCH
Please indicate below your agency's position or viewpoint on the draft permit and return this form by
August 21, 2009. If you have any questions on the draft permit, please contact me at [phone] or
via e-mail at [e-mail].
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:
L 7;,A C el
Opposes the issuance of the above permit, based on reasons stated below, or attached:
Signed / c r
1617 Mail Service Center, Raleigh, North Carolina 27699-1617
Location: 512 N. Salisbury St Raleigh, North Carolina 27604
Phone: [phone] FAX: [phone] \ Customer Service:1-877-623-6748
Internet: www.ncwaterquallty.org
An Equal Opportunity 1 Affirmative Action Employer
NonrthCarolina
Naturally

ATA
NCDENR
North Carolina Department of Environment and Natural Resources
Division of Environmental Health
Beverly Eaves Perdue Terry L. Pierce Dee Freeman
Governor Director Secretary
July 21, 2009
Memorandum
To: Bob Sledge, Environmental Engineer
NPDES Unit
From: Lee G. Spencer, Regional Engineer
Winston-Salem Regional Office
Public Water Supply Section, DEH, DENR
Re: NPDES Permit Numbers: NC0082949, NC0084212, NC00844252
Denton WTP, Davie County -Sparks Road WTP, Davidson Water, Inc. WTP
First of all, I want to apologize for the late response on these NPDES draft permits. Even though we have
discussed my concerns via phone conversation, I should have provided you a written response before now.
Tom Belnick and I also discussed my concerns via a phone conversation on June 19, 2009.
As you know, my primary concerns are the proposed monitoring changes for these Water Treatment Plant
(WTP) discharges. If there are true environmental concerns associated with these longstanding discharges, then
certainly the concerns should be addressed. However, especially in view of current economic difficulties for
most local governments, added monitoring requirements, without sound justification, seems inappropriate.
Many of the added constituents proposed for monitoring should not be a significant presence in the WTP
discharges. These appear to include: calcium, magnesium, fluoride, copper, zinc, and ammonia nitrogen.
Corrosion inhibitors, fluoridation, and chloramination are all introduced after filtration at a WTP. Therefore, it
is very unlikely that associated contaminants would ever be in backwash water, or settled water sludge.
Additionally, I would like to see Whole Effluent Toxicity monitoring quickly removed from the monitoring
requirements, if no problems are observed.
It seems strange to me that monitoring requirements for Settleable Solids and Turbidity have been removed
from these permits. These should be the main constituents in conventional WTP discharges, and permittees
need to be aware to keep these contaminants to a minimum in their discharges.
Thanks for allowing me the opportunity to comment on these draft permits.
Public Water Supply Section — Jessica G. Miles, Chief
Winston-Salem Regional Office
585 Waughtown Street, Winston-Salem, North Carolina 27107-2241
Phone: [phone] FAX: [phone] Internet: ncdrinkingwater.state.nc.us
An Equal Opportunity 1 Affirmative Action Employer
Nose Carolina
�tura!!y

Winston-Salem Journal
Advertising Affidavit
Winston-Salem Journal
P.O Box 3159
Winston-Salem, NC 27102
NCDENR/DWQ/POINT SOURCE BRANCH
ATTN: DINA SPRINKLE
1617 MAIL SERVICE CENTER
RALEIGH, NC 27699-1617
Account Number
3376309
Date
July 17, 2009
Date Category
Desciiption
i
Ad Size
Total Cost
07/17/2009
Legal Notices
PUBLIC NOTICE North Carolina Environment
2 x 54 L
374.61
PUBLIC NOTICE
North Carolina Environmental
Management Commission/NPDES Unit
1617 Mali Service Center
Raleigh, NC 27699-1617
Notice of Intent to Issue a
NPDES 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 proposed permit
will be accepted until 30 days after the publish date
of this notice. The Director of the NC Division of
Water Quality (DWQ) may hold a public hearing
should there be a significant degree of public in-
terest. Please mail comments and/or Information
requests to DWQ at the above address. Interested
persons may visit the DWQ at 512 N. Salisbury
Street, Raleigh, NC to review information on file.
Additional Information on NPDES permits and this
notice may be found on our website: www.ncwater
quality.org, or by calling [phone].
Davidson Water, Inc requested renewal of permit
NC0084425 for its water treatment plant in David-
son County; this permitted discharge is treated fil-
ter backwash wastewater to an unnamed tributary
to the Yadkin River In the Yadkin -Pee Dee River
Basin.
The Norfolk Southern Railway Company has applied
for renewal of NPDES permit NC0029246 for the
Spencer Yard In Davidson County. This permitted
facility discharges treated industrial wastewater
to South Potts Creek in the Yadkin Pee -Dee River
Basin.
The Aqua North Carolina, Inc requested a new per-
mit N00088854 for Pine Lakes Subdivision Well # 2
in Surry County; this facility discharge is treated
filter backwash to unnamed tributary to Stewart
Creek, Yadkin River Basin.
The Town of Yadklnvfle requested renewal of per-
mit NC0079260 for the Yadklnville WTP in Yadkin
County. This permitted discharge is treated filter -
backwash wastewater to South Deep Creek in the
Yadkin -Pee Dee River Basin.
WSJ: July 17, 2009
Media General Operations, Inc.
Publisher of the
Winston-Salem Journal
Forsyth County
Before the undersigned, a Notary Public of Forsyth County, North Carolina, duly
commissioned, qualified, and authorized by law to administer oaths, personally appeared
D.I-I. Stanfield, who by being duly sworn deposes and says: that he is Controller of the
Winston-Salem Journal, engaged in the publishing of a newspaper known as Winston-Salem
Journal, published, issued and entered as second class mail in the City of Winston-Salem, in
said County and State: that he 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 the Winston-Salem Journal on the following dates:
07/17/2009
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
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 17th day ofJuly, 2009
(signature of pers n ma % 'davit)
Sworn to and subscribed before me, this 17th day ofJuly, 20
xbli
KIMALEY JOHNSON
NOTARY PUBLIC
My Commission expires Lc ..) ).010 FORSYTH COUNTY
STATE OF NORTH CAR
MY COMMISSION EXPIRES')-G ie
JN.Alo
smm b ,c • or .� 8
THIS IS NOT A BILL. PLEASE PAY FROM INVOICE. THANK YOU

(
Permit Number: N Co° $ty a
Facility Name: Dew,/ 3 °"
Type of WTP: Conventional _ Greensand Filter Reverse Osmosis
Person Contacted: G r e9 9 Sick ler
Date/Time:
Wo_ €_ , 7 he,
Does the facility use finished, potable water to backwash filters? No
If no, what is used?
Does the facility use zinc orthophosphate as a corrosion inhibitor? Ye No
Does the facility use chloramines as an alternate form of disinfection? Yes
Highest Monthly Average Flow over past three years: Q • 2 3 % MGD
Receiving Stream: UT yAiv,
7 10 Flow: ' Q Source: ssLikr 1°'^
IWC: 10 0
Discharge to NSW waters? Yes
Discharge to water supply waters?
Is the stream impaired/on 303d list?
Yes
i/ tk 1/(c4
1,4 au 1(0..4
No
No
If yes, for what?
--(gti "Ca-

Mailing Address
Davidson Water Inc.
P.O. Box 969
Welcome, NC 27374
Lexington [phone]
Winston-Salem [phone]
Thomasville [phone]
DAVIDSON
WATER INC.limo
November 19, 2008
Mrs. Dina Sprinkle
NC DENR/DWQ/Point Source Branch
1617 Mail Service Center
Raleigh, NC 27699-1617
Dear Ms. Sprinkle:
Shipping Address
Davidson Water Inc.
7040 Old Highway 52
Lexington, NC 27295
Water Plant
Office Fax
[phone]
[phone]
www.davidsonwater.com
email [e-mail]
Re: NPDES Permit Application
Permit # NC 0084425
Davidson Water, Inc. is requesting renewal of the NPDES Permit NC0084425.
There have been no changes at the facility since the issuance of the last permit. Please
find enclosed our application packet.
Thank you.
GS/mp
Sincerely,
717:650,--
Gregg Stabler
Manager
RECE'.'ED
2 1 200B
DENR - WATER OUALITY
POINT SOURCE BRANCH

NPDES PERMIT APPLICATION - SHORT FORM C - WTP
For discharges associated with water treatment plants
Mail the complete application to:
N. C. DENR / Division of Water Quality / NPDES Unit
1617 Mail Service Center, Raleigh, NC 27699-1617
NPDES Permit Number
NC00 84425
If you are completing this form in computer use the TAB key or the up - down arrows to move from one
field to the next. To check the boxes, click your mouse on top of the box. Otherwise, please print or type.
1. Contact Information:
Owner Name
Facility Name
• Mailing Address
City
State / Zip Code
Telephone Number
Fax Number
e-mail Address
Davidson Wn te,r, Inc,
Davidson Water, Inc. Water Plant
PO Box 969
Welcome
NC 2.7374
. [phone]
[phone]
[e-mail]
2. Location of facility producing discharge:
Check here if same as above ❑
Street Address or State Road 388 Koonts Road
City
State / Zip Code
County
Lexington
NC 27295
Davidson
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 Davidson Water, Inc.
Mailing Address PO Box 969
City Welcome
State / Zip Code NC 27374
Telephone Number (336 )787 5800
Fax Number (336 )731-31 95
4. Ownership Status:
Federal ❑ State ❑
Private [j Public ❑
Page 1 of 3 C-WTP 05/08

NPDES PERMIT APPLICATION - SHORT FORM C - WTP
For discharges associated with water treatment plants
5. Type of treatment plant:
ic Conventional (Includes coagulation, flocculation, and sedimentation, usually followed by
filtration and disinfection)
0 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
0
6. Description of source water(s) (i.e. groundwater, surface water)
Yadkin River
7. Describe the treatment process(es) for the raw water:
Attached
8. Describe the wastewater and the treatment process(es) for wastewater generated by the
facility:
Attached
9. Number of separate discharge points: 1
Outfall Identification number(s) 0 01
10. Frequency of discharge: Continuous f
If intermittent:
Days per week discharge occurs: Duration:
Intermittent ❑
11. Plant design potable flow rate 2 0 MGD Backwash or reject flow 5 MGD
12. Name of receiving stream(s) (Provide a map showing the exact location of each outfall, including
latitude and longitude):
Yadkin River Northing 767910.800 SFT
Easting 1589430.830 SFT
Page 2 of 3 C-WTP 05/08

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.
Chlorine
Caustic
Sodium Permanganate Flouride
Lime Ferric Sulfate
Zinc Orthophosphate
14. Is this facility located on Indian country? (check one)
Yes ❑ Non
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.
Attached
• Solids Handling Plan
Attached
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.
AZ Je i- A• ok5 c L
Printed nrme of Person Signing Title
`"
Signature of Applicant
/4_
J)-J9.De
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 05/08

7. Describe the treatment process(es) for raw water.
Water is pumped from the Yadkin river into our three storage ponds going to our upper
lake first and then released to our lower ponds giving the longest settling time possible.
Then the water is pumped from our off stream storage ponds to the plant where we add
ferric sulfate to it for our coagulation process. Sodium permanganate is also added for
oxidation as well as chlorine for disinfection. After coagulation and sedimentation the
water is filtered through our 20 mixed media filters. After filtration, we add additional
chlorine for disinfection, fluoride for prevention of dental cavities, lime for PH
stabilization and zinc orthophosphate for corrosion control.
8. Describe the wastewater and the treatment process(es) for wastewater generated
by the facility.
Wastewater from the treatment process flows to two 350,000 gallon waste ponds for
settling. The decant water is allowed to return to the Yadkin River after it has been
dechlorinated using calcium thiosulfate.
15. Solids Handling Plan
All backwash water, water from track -vac system and settling basins wastewater goes
into our two sludge ponds. Water is decanted off the sludge ponds leaving the sediment.
The sediment is pumped off the bottom of the sludge ponds onto two vacuum beds where
water is sucked off leaving the sludge to dry and then being taken to the landfill. We
have a land use permit for our sludge and when our vacuum beds won't keep up we have
the sludge land applied. This occurs about twice a year.

CHEMICAL ADDITIONS
Ferric
CHLORINE Sulfate
10 TO 20 MGD
RAW WATER
IMPOUNDMENT
LAKES
DAVIDSON WATER INC.
P.O. BOX 969
WELCOME, N.C. 27374
[phone]
DESIGN FLOW=20 MGD
RAPID MIX
T50=5 MIN.
(:(I
ASHWATER
POND
FLOCCULATION
4 BASINS
PADDLE FLOCCULATORS
8400 GPM Average
T50=30 MIN.
CHEMICAL ADDITIONS
SODIUM
PHOSPHATE HYDROXIDE FLUORIDE CHLORINE
CLEARWELL TANKS
4,500,000 GALLONS
I
f
I
CHLORINE
SEDIMENTATION
6 BASINS
8400 GPM Average
T50=217 MIN.
CHLORINE
o
FILTRATION
20 MULTI MEDIA FILTERS
4 GPM/SF
18 IN. ANTHRACITE COAL
10 IN. SAND
12 IN. STONE
WHEELER UNDERDRAIN FILTERS 1-8
LEOPOLD UNDERDRAIN FILTERS 9-12
BACKWASH ON HEADLOSS AND TURBIDITY
TO SYSTEM
HIGH SERVICE PUMPS

FACT SHEET FOR EXPEDITED PERMIT RENEWALS
to determine potential for expedited permit renewal
Reviewer/Date
(R (v\ Be S-
Permit Number
1N1 C 00 i- 2 5-
Facility Name
'D A-1 D 5 o Q ) f-7 K/2 W re
Basin Name/Sub-basin number
'ilt>D 1c4 0 c 3 _ 6-4 0
Receiving Stream
1 kn /a-ov, 4
Stream Classification in Permit
w S tT c A
Does permit need NH3 limits?
/...j 0
Does permit need TRC limits?
`-( E‹
Does permit have toxicity testing?
o
Does permit have Special Conditions?
ti.l 3
Does permit have instream monitoring? ;'''
i ,c --si'
Is the stream impaired (on 303(d) list)?
`? r
Any obvious compliance concerns?
No
Any permit mods since last permit?
/-10
Existing expiration date
IYl /) -1 3 1 2,2 0 ct
New expiration date
pa /1--1 311 ?.a 1 `�'
New permit effective date
-1'1
Miscellaneous Comments
.7 in 'tiJ P , Aez_ 1c-r)�v�,
r1 7
D-. o.Y, i . 4 _
YESV This is a SIMPLE EXPEDITED permit renewal (administrative
renewal with no changes, or only minor changes such as TRC, NH3,
name/ownership changes). Include conventional WTPs in this group.
YES_ This is a MORE COMPLEX EXPEDITED permit renewal (includes
Special Conditions (such as EAA, Wastewater Management Plan), 303(d)
listed, toxicity testing, instream monitoring, compliance concerns, phased
limits). Basin Coordinator to make case -by -case decision.
YES_ This permit CANNOT BE EXPEDITED for one of the following reasons:
• Major Facility (municipal/industrial)
• Minor Municipals with pretreatment program
• Minor Industrials subject to Fed Effluent Guidelines (lb/day limits for BOD, TSS,
etc)
• Limits based on reasonable potential analysis (metals, GW remediation organics)
• Permitted flow > 0.5 MGD (requires full Fact Sheet)
• Permits determined by Basin Coordinator to be outside expedited process
TB Version 8/18/2006 (NPDES Server/Current Versions/Expedited Fact Sheet)