NC0061930_Permit Issuance_19970818

State of North Carolina IT a
Department of Environment, 9A 1 A
Health and Natural Resources 4 •
Division of Water Quality
James B. Hunt, Jr., Governor
Wayne McDevitt, Secretary n FE H N F-1
A. Preston Howard, Jr., P.E., Director
August 18,1997
Mr.George S.Schmitt
Mark Laurel Homeowner's Association
P.O.Box 375
Highlands, North Carolina 28741
Subject: NPDES Permit Issuance
Permit No. NCO061930
Mountain Laurel WWTP
Macon County
Dear Mr. Schmitt:
In accordance with the application for a discharge permit received on February 13, 1997,the Division
is forwarding herewith the subject NPDES 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 US Environmental Protection Agency dated December 6,1983.
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,Post Office Drawer 27447,Raleigh, North Carolina 27611-7447. Unless such demand is made, this
decision shall be final and binding.
Please take notice this permit is not transferable. Part ILEA. addresses the requirements to be
followed in case of change in ownership or control of the subject facility.
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,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 Jeff Myhra at telephone number(919)
733-5083,extension 597.
Sincerely,
Original Signed By
David A. Goodrich
A.Preston Howard,Jr.,P.E.
cc: Central Files
Asheville Regional Office
Mr. Roosevelt Childress, EPA
Permits and Engineering Unit
Facility Assessment Unit
P.O.Box 29535,Raleigh,North Carolina 27626-0535 Telephone[phone] FAX[phone]
An Equal Opportunity Affirmative Action Employer 50%recycled/10%post-consumer paper

Permit No. NCOQ61930
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT, HEALTH, AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM.
In compliance with the provision of North Carolina General Statute 143-215.1, other lawful standards
and regulations promulgated and adopted by the North Carolina Environmental Management
Commission, and the Federal Water Pollution Control Act, as amended,
Mark Laurel Homeowner's Association
is hereby authorized to discharge wastewater from a facility located at the
Mountain Laurel Subdivision
NC Highway 106
west of Highlands
Macon County
to receiving waters designated as East Fork Overflow Creek in the Savannah River Basin in accordance
with effluent limitations,monitoring requirements, and other conditions set forth in Parts I,H,III, and IV
hereof.
The permit shall become effective October 1, 1997
This permit and the authorization to discharge shall expire at midnight on August 31,2002
Signed this day August 18, 1997
Original Signed By
David A. Goodrich
A. Preston Howard,Jr.,P.E.,Director
Division of Water Quality
By Authority of the Environmental Management Commission

t
Permit No. NCO061930
SUPPLEMENT TO PERMIT COVER SHEET
Mark Laurel Homeowners Association
is hereby authorized to:
1. Continue to operate an existing 0.042 MGD extended aeration (diffused air) system with a
clarifier and ultraviolet disinfection at Mountain Laurel Subdivision, on NC Highway 106,
west of Highlands, Macon County (See Part III of this Permit), and
2. Discharge from said treatment works at the location specified on the attached map into East
Fork Overflow Creek which is classified Class C-Trout ORW waters in the Savannah
River Basin.

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ROAD CLASSIFICATION SCALE 1:2.4 000
PRIMARY HIGHWAY LIGHT-DUTY ROAD,HARD OR 0 1 MILE
HARD SURFACE IMPROVED SURFACE
SECONDARY HIGHWAY 0 7000 FEET
HARD SURFACE UNIMPROVED ROAD
1 0 1 KILOMETER
Latitude 35°02'54" Longitude 83014'01"
Map # G6SW Sub-basin 3-13-01 CONTOUR INTERVAL 40 FEET
Stream Class C-Trout ORW
QUAD LOCATION Mark Laurel Homeowner's Assoc.
Discharge Codes 05 06 NCO061930
Receiving Stream East Fork Overflow Creek % Macon County
Design Q o.042 MGM Permit expires 8/31/02 Mountain Laurel WWTP

A. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS FINAL Permit No. NCO061930
During the period beginning on the effective date of the permit and lasting until expiration, the Permittee is authorized to discharge from outfall serial number
001. Such discharges shall be limited and monitored by the Permittee as specified below:
IVIGNLT:ORIN'la;..RE <>
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Flow 0.042 MGD Continuous Instantaneous I or E
BOD,5 day, 200C 30.0 m /I 45.0 m /l Weekly Composite E
Total Suspended Residue 30.0 m I 45.0 m /I Weekly Composite E
NH3 as.N (April 1 to October31) 2.2 mg/I Weekly Composite E
NH3 as'N (November 1 to March 31) 6.6 mg/I Weekly Composite E
Dissolved Oxygen2 Weekly Grab E, U, D
Fecal Coliform (geometric mean 200 1100 ml 400/ 100 ml Weekly Grab E, U, D
Total Residual Chlorine3 28.0 /I 2/Week Grab E
Temperature Daily Grab E
Temperature Weekly Grab U, D
H4 Weekly Grab E
Conductivity Weeklv Grab U D
Notes-:
Sample locations:E- Effluent, I-Influent, U - Upstream of ouff all at unimproved road, D-Downstream approximately 0.2 miles from the outfall.
2 The daily average dissolved oxygen effluent concentration shall not be less than 5.0 mg/I.
3 Monitoring is only required 9 chlorine is used for disinfection at the facility.
4 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.
i

a
Staff Review and Evaluation
NPDES Wastewater Permit
FACILITY INFORMATION Tp,q�4,
Facility M�aurel Subdivision
NPDES No. NCO061930
Design Flow(MGD) 0.042 MGD
Facility Class II
STREAM CHARACTERISTICS
(o► Stream Name East Fork Overflow Creek
Stream Class C-TR ORW
90'V� �!� Sub-basin 03-13-01
1n �� „ '` S Drainage Area (mil) 0.33
OI �,,A pv S7Q10 (cfs) 0.10
1 f" if, � tv W7Q10 (cfs) 0.20
C�C7� 30Q2 (cfs) 0.30
r IWC (%) 39
Proposed Chan es Parameters Affected Basis for chan e(s)
Permit Cover Sheet Page Added Part IV reference Not part of previous permit
Supplement to Permit Cover Added UV disinfection to Facility currently uses UV
Sheet Page treatments stem description disinfection
Special Conditions Page Deleted Special Condition D Language is now covered within
new boilerplate
Effluent Limitations and Took out note number 4 in This note is not required for 100
Monitoring Requirements Page reference to stream temperature percent domestic facilities.
increase.
Effluent Limitations and Revised the DO limit from 3 to 5 WLA notes had no explanation
Monitoring Requirements Page mg/l. as to why a DO limit of 3 mg/1
was given. DMR data from 95
and 96 identified DO levels to
be above 6 mg/l. Revised limit
to5m /l.
Effluent Limitations and Downstream monitoring location Information was incorrectly
Monitoring Requirements Page was changed from 2 miles reported during last renewal.
downstream to 0.2 miles Current WLA states monitoring
downstream should be conducted 0.2 miles
downstream.
Effluent Limitations and Changed monitoring frequency Changed to reflect class II
Monitoring Requirements Page for BOD, TSS, NH3, Fecal requirements in 2B.0500
Coliform,and pH from 2/month
to weekly. Chlorine monitoring
was also changed from daily to
2/week.
Compliance Schedule: n/a
Special Condition(s): n/a
Permits&Engineering Comments:
Facility is renewing at existing flow with no change in wastewater characteristics. Permit was drafted
with existing limits. No observable violations were noted during DMR review.
Region,please review downstream sampling location. The WLA, prepared on 4-9-92, stated 0.2 miles
for the downstream sampling location while the old permit stated 2.0 miles downstream. I changed the

downstream sampling location to 0.2 miles downstream to reflect the information reported in the WLA.
Region,please comment of downstream accessibility 0.2 miles from the outfall.
It is recommended that this permit be renewed as drafted.
Prepared by:
e T.Myhra
Regional Office Evaluation and Recommendations: Changs wordi�� to a ffvoX `&'• N,% o'a- '"
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File Notes (NC0061930)
May 1, 1997
MEMORANDUM
TO: File I��
FROM: Jeff Myhr YV`
DATE: June 24, 1997
SUBJECT: Instream Monitoring Requirements (NC0061930)
Bill Anderson of the ARO recommended dropping the instream monitoring requirements for the
subject facility. This request was brought to the attention of the modeler for this facility (Andy
McDaniel). Mr. McDaniel expressed extreme concern for dropping instream monitoring
requirements due to the following issues:
• Due to the fact that the stream is classified ORW.
• Due to the fact that we do not have a good handle on the 7Q10 flow (it's very hard to
estimate for facilities with very small drainage areas. The drainage area for this c✓Y--c�
is 0.33 mi2 ,
The instream monitoring requirement will remain in the permit renewal.

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NC0061930
Facility: Mountain Laurel Subdivision
Discharge to: East Fork Overflow Creek
Stream class and index#:C-TR ORW
Residual Chlorine Ammonia as NH3
(summer)
7Q10 (CFS) 0.1 7Q10 (CFS) 0.1
DESIGN FLOW(MGD) 0.042 DESIGN FLOW(MGD) 0.042
DESIGN FLOW(CFS) 0.0651 DESIGN FLOW(CFS) 0.0651
STREAM STD(UG/L) 17.0 STREAM STD(MG/L) 1.0
UPS BACKGROUND LEVEL(UG/L) 0 UPS BACKGROUND LEVEL(MG/L) 0.22
IWC (%) 39.43 IWC (%) 39.43
Allowable Conc.(ug/1) 43.11 Allowable Concentration (mg/1) 2.20
minimum=2
Ammonia as NH3
(winter)
7Q10(CFS) 0.2
Fecal Limit 200/1o0mi DESIGN FLOW(MGD) 0.042
Ratio of 1.51 DESIGN FLOW(CFS) 0.0651
STREAM STD(MG/L) 1.8
UPS BACKGROUND LEVEL(MG/L) 0.22
IWC(%) 24.56
Allowable Concentration (mg/1) 6.65
minimum=4