NC0021873_Permit (Issuance)_20071001

NPDES DOCUHENT SCANNINL COVER SHEET
NPDES Permit:
NC0021873
Mayodan WWTP
Document Type:Permit
Issuance
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Complete File - Historical
Engineering Alternatives (EAA)
Correspondence
Owner Name Change
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Document Date:
October 1, 2007
This document is printed on reuse paper - igrnore any
content on the reverse tide

AAA
NCDENR
Michael F. Easley
Govemor
William G. Ross, Jr., Secretary
North Carolina Department of Environment and Natural Resources
Coleen H. Sullins, Director
Division of Water Quality
October 1, 2007
Ms. Debra Caldwell
Town Manager
210 West Main Street
Mayodan, North Carolina 27027
Subject: Issuance of NPDES Permit NC0021873
Mayodan Waste Water Treatment Plant
Rockingham County
Dear Ms. Caldwell:
The Division of Water Quality (the Division) hereby issues the attached NPDES permit for the subject
facility. We issue this permit 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.
Your Request to Decrease Flow Limits. The Division has reviewed your request to reduce permitted
flow based on flow rate data submitted, and acknowledges a significant decrease in wastewater effluent
(0.439 MGD average for May 2007) at the subject WWTP. We further understand that this corresponds to
a marked decrease in influent wastes resulting from the loss a Significant Industrial User (SIU), and that
you do not expect this influent to return in the near future. Considering this, and Mayodan's facilities "as
built" to 4.5 MGD, the Division has modified your existing flow -tiered permit, as requested.
New tiers include flow limits at 2.5 MGD, 3.0 MGD, and 4.5 MGD [see permit Sections A. (1.), A. (2.),
and A. (3.)]. The 2.5 MGD first tier constitutes a WWTP downgrade from. a Class IV to a Class III facility
with correspondingly relaxed limits and monitoring conditions.
Please note that your permit compliance responsibilities will again increase from Class III to Class IV
when your 12-month average effluent flow exceeds 2.0 MGD (80 % of 2.5 MGD), based on a calendar
year average. Upon reaching this average, your compliance with the permit will immediately revert to -
limits and conditions appropriate to the next tier, 3.0 MGD (Grade IV).
Renewal — Reasonable Potential Analysis. As part of renewal, the Division conducted a Reasonable
Potential Analyses (RPA) on Mayodan's analytical data for toxicants and metals submitted over the last
permit cycle, in compliance with state and federal regulations. These analyses evaluate potential pollutants
of concern and establish their reasonable potential to exceed state and/or federal instream water -quality
Standards. The RPA applied these data to each of three permitted flows (2.5 MGD, 3.0 MGD, and 4.5
MGD). Based on this evaluation, the Division has revised limits and monitoring conditions for mercury,
lead, selenium, copper, silver, and zinc [see permit Sections A. (1.), A. (2.), and A. (3.)].
N. C. Division of Water Quality / NPDES Unit
1617 Mail Service Center, Raleigh, NC 27699-1617
- Internet: h2o.enr.state.nc.us
Phone: [phone]
fax: [phone]
DENR Customer Service Center: 1 800 623-7748

Issuance of NPDES Permit NC0021873
Town of Mayodan WWTP
Page 2
If any parts, monitoring 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. You must submit this request in the form of a written petition, conforming
to Chapter 150B of the North Carolina General Statutes, and file it with the office of Administrative
Hearings, 6714 Mail Service Center, Raleigh, North Carolina 27699-6714. Unless such a demand is made,
this permit shall be final and binding.
Please notice that this permit is not transferable except after notifying the Division. The Division may
modify, or revoke and reissue this permit. This permit does not affect your legal requirements to obtain
other permits required by the Division of Water Quality, the Division of Land Resources, the Division of
Coastal Management, or by federal or other local governments.
If you have questions, or if we may be of further service, please call Joe Corporon at [phone],
extension 597 or email [e-mail].
Sincerely,
41"
„for ; Coleen H. Sullins
cc: Central Files
Winston-Salem Regional Office, Water Quality Section
NPDES Program
Aquatic Toxicology Unit
Pretreatment Unit
EPA Region 4

Permit NC0021873
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
(NPDES)
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, the
Town of Mayodan
is hereby authorized to discharge wastewater from a facility located at the
Mayodan WWTP
NC Highway 135 West, southeast of Mayodan
Rockingham County
to receiving waters designated as the Mayo River in the Roanoke River Basin in accordance with effluent
limitations, monitoring requirements, and other conditions set forth in Parts I, II, III and IV hereof.
The permit shall become effective November 1, 2007.
This permit and the authorization to discharge shall expire at midnight on May 31, 2012.
Signed this day October 1, 2007.
Coleen H. Sullins, Director
Division of Water Quality
By Authority of the Environmental Management Commission

Permit NC0021873
SUPPLEMENT TO PERMIT COVER SHEET
All previous NPDES Permits issued to this facility, whether for operation or discharge are hereby
revoked, and as of this 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 described herein.
The Town of Mayodan is hereby authorized to:
1. Continue to operate an existing 4.5 MGD wastewater treatment facility that includes the following
wastewater treatment components:
• Mechanical bar screen
• Grit removal
• Dual path aeration basins
• Secondary clarifiers
• Chlorination
• Dechlorination
• Sludge thickener
• Aerobic digester
• Sludge drying beds
This permitted facility is located off NC Highway 135 southeast of Mayodan in Rockingham County.
2. Continue to operate at 2.5 MGD wastewater treatment facility until the average flow for any
twelve (12) month period exceeds 80% of the permitted flow (2.0 MGD), after which time the
facility must monitor in accordance with effluent limitations and monitoring requirements
specified for 3.0 MGD, and
3. Continue to operate at 3.0 MGD wastewater treatment facility until the average flow for any
twelve (12) month period exceeds 80% of the permitted flow (2.4 MGD), after which time the
facility must monitor in accordance with effluent limitations and monitoring requirements
specified for 4.5 MGD, and
4. Discharge from said treatment works via Outfall 001 [specified on the attached map] into the
Mayo River, a Class C waterbody within the Roanoke River Basin.

Town of Mayodan WWTP
Latitude: 36° 24' 25" N State Grid/Ouad: B19 NW / Mayodan, NC
Longitude: 79° 57' 56" W Permitted Flow: Episodic -- not limited
Receiving Stream: Mayo River Drainage Basin: Roanoke River Basin
Stream Class: C Sub -Basin: 03-02-02
North
NPDES Permit No. NC0021873
Rockingham County

Permit NC0021873
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS - (2.5 MGD)
Beginning on the permit effective date and lasting until the twelve (12) month average flow exceeds 2.0 MGD, or
until permit expiration, the Permittee is authorized to discharge treated wastewater from Outfall 001. Such
discharges shall be limited and monitored by the Permittee as specified below:
PARAMETER
EFFLUENT LIMITATIONS
MONITORING REQUIREMENTS
Monthly
Average
Weekly
Average
Daily
Maximum
Measurement
Frequency
Sample
Type
Sample
Location'
Flow
2.5 MGD
Continuous
Recording
Influent or Effluent
BOD, 5-day, 20°C 2
30.0 mg/L
45.0 mg/L
3/Week
Composite
Influent and Effluent
Total Suspended Solids2
30.0 mg/L
45.0 mg/L
3/Week
Composite
Influent and Effluent
NH3 as N (Apr 1 - Oct 31)
16.1 mg/L
40.2 mg/L
3/Week
Composite
Effluent
NH3 as N (Nov 1 — Mar 31)
Weekly
Composite
Effluent
Total Residual Chlorine
28 µg/L
3/Week
Grab
Effluent
Fecal Coliform
(geometric mean)
200/100 ml
400/100 ml
.
3/Week
Grab
Effluent
pH
> 6.0 and < 9.0 standard units
3/Week
Grab
Effluent
Dissolved Oxygen
3/Week
Grab
Effluent
Temperature
3/Week
Grab
Effluent
Conductivity
3/Week
Grab
Effluent
Total Nitrogen
(NO2+NO3+TKN)
Monthly
Composite
Effluent
Total Phosphorus
Monthly
Composite
Effluent
Total Lead
34 pg/L
Weekly
Composite
Effluent
Total Selenium
102 µg/L
56 µg/L
Weekly
Composite
Effluent
Total Copper
2/Month
Composite
Effluent
Total Silver
2/Month
Composite
Effluent
Total Zinc
2/Month
Composite
Effluent
Chronic Toxicity3
Quarterly
Composite
Effluent
Notes:
1. See Part A. (4) for instream sampling requirements.
2. The monthly average effluent BOD5 and TSS concentrations shall not exceed 15%
of the respective influent value (i.e., 85% removal is required).
3. Chronic Toxicity (Ceriodaphnia) at 5 % with testing in March, June, September
and December [see A. (5.)].
The Permittee shall discharge no floating solids or foam visible in other than trace amounts.

Permit NC0021873
A. (2.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS - (3.0 MGD)
During the period after the twelve (12) month average flow exceeds 2.0 MGD and lasting until the twelve (12)
month average flow exceeds 2.4 MGD, or until permit expiration, the Permittee is authorized to discharge from
Outfall 001. Such discharges shall be limited and monitored by the Permittee as specified below:
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Flow
3.0 MGD
Continuous
Recording
Influent or Effluent
BOD, 5-day, 20°C 2
30.0 mg/L
45.0 mg/L
Daily
Composite
Influent and Effluent .
Total Suspended Solids2
30.0 mg/L
45.0 mg/L
Daily
Composite
Influent and Effluent
NH3 as N (Apr 1 - Oct 31)
14.0 mg/L
35.0 mg/L
Daily
Composite
Effluent
NH3 as N (Nov 1— Mar. 31)
3/Week
Composite
Effluent
Total Residual Chlorine
28 µg/L
Daily
Grab
Effluent
Fecal Coliform
(geometric mean)
200/100 ml
400/100 ml
Daily
Grab
Effluent
pH
> 6.0 and < 9.0 standard units
Daily
Grab
Effluent
Dissolved Oxygen
Daily
Grab
Effluent
Temperature
Daily
Grab
Effluent
Conductivity
Daily
Grab
Effluent
Total Lead
34 µg/L
Weekly
Composite
Effluent
Total Selenium
74 µg/L
56 µg/L
Weekly
Composite
Effluent
Total Nitrogen
(NO2+NO3+TKN)
Monthly
Composite
Effluent
Total Phosphorus
Monthly
Composite
Effluent
Total Mercury 3
2/Month
Grab
Effluent
Total Copper
2/Month
Composite
Effluent
Total Silver
2/Month
Composite
Effluent
Total Zinc
2/Month
Composite
Effluent
Chronic Toxicity4
Quarterly
Composite
Effluent
Notes:
1. See Part A. (4) for instream sampling requirements.
2. The monthly average effluent BOD5 and TSS concentrations shall not exceed 15% of
the respective influent value (i.e., 85% removal is required).
3. Mercury sampling and analyses shall be conducted using techniques described in
USEPA test Method 1631E. •
4. Chronic Toxicity (Ceriodaphnia) at 6% with testing in March, June, September and
December [see A. (6.)].
The Permittee shall discharge no floating solids or foam visible in other than trace amounts.

Permit NC0021873
A. (3.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS - (4.5 MGD)
During the period after the twelve (12) month average flow exceeds 2.4 MGD and lasting until the twelve (12)
month average flow exceeds 3.6 MGD, or until permit expiration, the Permittee is authorized to discharge from
Outfall 001. Such discharges shall be limited and monitored by the Permittee as specified below.
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Flow
4.5 MGD
Continuous
Recording
Influent or Effluent
BOD, 5-day, 20°C 2
30.0 mg/L
45.0 mg/L
Daily
Composite
Influent and Effluent
Total Suspended Solids2
30.0 mg/L
45.0 mg/L
Daily
Composite
Influent and Effluent
NH3 as N (Apr 1 - Oct 31)
9.3 mg/L
27.9 mg/L
Daily
Composite
Effluent
NH3 as N (Nov 1- Mar 31)
27.5 mg/L
35 mg/L
Daily
Composite
Effluent '
Total Residual Chlorine
28 µg/L
Daily
Grab
Effluent
Fecal Coliform
(geometric mean)
200/100 ml
400/100 ml
Daily
Grab
Effluent
pH
> 6.0 and < 9.0 standard units
Daily
Grab
Effluent
Dissolved Oxygen
Daily
Grab
Effluent
Temperature
Daily
Grab
Effluent
Conductivity
Daily
Grab
Effluent
Total Lead
34 µg/L
Weekly
Composite
Effluent
Total Mercury
0.14 µg/L
Weekly
Composite
Effluent
Total Selenium
59 µg/L
56 µg/L
Weekly
Composite
Effluent
Total Nitrogen
(NO2+NO3+TKN)
Monthly
Composite
Effluent
Total Phosphorus
•
Monthly
Composite
Effluent
Total Copper
2/Month
Composite
Effluent
Total Silver
2/Month
Composite
Effluent
Total Zinc
2/Month
Composite
Effluent
Chronic Toxicity3
Quarterly
Composite
Effluent
Notes:
1. See Part A. (4) for instream sampling requirements.
2. The monthly average effluent BODS and TSS concentrations shall not exceed 15%
of the respective influent value (i.e., 85% removal is required).
3. Chronic Toxicity (Ceriodaphnia) at 9 % with testing in March, June, September
and December [see A. (7.)].
The Permittee shall discharge no floating solids or foam visible in other than trace amounts.

Permit NC0021873
A. (4.) INSTREAM MONITORING REQUIREMENTS
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Dissolved Oxygen
June -September
3/week
Grab
Upstream at NC Hwy 135,
Downstream at NCSR 2177
October -May
1/week
Temperature
June -September
3/week
Grab
Upstream at NC Hwy 135,
Downstream at NCSR 2177
October -May
1/week
pH
June -September
3/week
Grab
Upstream at NC Hwy 135,
Downstream at NCSR 2177
October -May
1/week
Conductivity
June -September
3/week
Grab
Upstream at NC Hwy 135,
Downstream at NCSR 2177
October -May
I/week
A. (5.) QUARTERLY CHRONIC TOXICITY PERMIT LIMIT - (2.5 MGD)
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to Ceriodaphnia
dubia at an effluent concentration of 5%.
The permit holder shall perform at a minimum, quarterly monitoring using test procedures outlined in the "North Carolina
Ceriodaphnia Chronic Effluent Bioassay Procedure," Revised February 1998, or subsequent versions or `North Carolina Phase
II Chronic Whole Effluent Toxicity Test Procedure" (Revised -February 1998) or subsequent versions. The tests will be
performed during the months of March, June, September and December. Effluent sampling for this testing shall be
performed at the NPDES permitted final effluent discharge below all treatment processes.
If the test procedure performed as the first test of any single quarter results in a failure or ChV below the permit limit, then
multiple -concentration testing shall be performed at a minimum, in each of the two following months as described in "North
Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised -February 1998) or subsequent versions.
The chronic value for multiple concentration tests will be determined using the geometric mean of the highest concentration
having no detectable impairment of reproduction or survival and the lowest concentration that does have a detectable
impairment of reproduction or survival. The definition of "detectable impairment," collection methods, exposure regimes, and
further statistical methods are specified in the "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure"
(Revised -February 1998) or subsequent versions.
All toxicity testing results required as part of this permit condition will be entered on the Effluent Discharge Monitoring Form
(MR-1) for the months in which tests were performed, using the parameter code TGP3B for the pass/fail results and THP3B
for the Chronic Value. Additionally, DWQ Form AT-3 (original) is to be sent to the following address:
Attention: NC DENR / DWQ / Environmental Sciences Section
1621 Mail Service Center
Raleigh, North Carolina 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, accurate, include all supporting chemical/physical measurements and all concentration/response
data, and be certified by laboratory supervisor and ORC or approved designate signature. 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 Branch at the address cited above.
Should the Permittee fail to monitor during a month in which toxicity monitoring is required, monitoring will be required during
the following month.

Permit NC0021873
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.
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.
A. (6.) QUARTERLY CHRONIC TOXICITY PERMIT LIMIT - (3.0 MGD)
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to Ceriodaphnia
dubia at an effluent concentration of 6 %.
The permit holder shall perform at a minimum, quarterly monitoring using test procedures outlined in the "North Carolina
Ceriodaphnia Chronic Effluent Bioassay Procedure," Revised February 1998, or subsequent versions or "North Carolina Phase
II Chronic Whole Effluent Toxicity Test Procedure" (Revised -February 1998) or subsequent versions. The tests will be
performed during the months of March, June, September and December. Effluent sampling for this testing shall be
performed at the NPDES permitted final effluent discharge below all treatment processes.
If the test procedure performed as the first test of any single quarter results in a failure or ChV below the permit limit, then
multiple -concentration testing shall be performed at a minimum, in each of the two following months as described in "North
Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised -February 1998) or subsequent versions.
The chronic value for multiple concentration tests will be determined using the geometric mean of the highest concentration
having no detectable impairment of reproduction or survival and the lowest concentration that does have a detectable
impairment of reproduction or survival. The definition of "detectable impairment," collection methods, exposure regimes, and
further statistical methods are specified in the "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure"
(Revised -February 1998) or subsequent versions.
All toxicity testing results required as part of this permit condition will be entered on the Effluent Discharge Monitoring Form
(MR-1) for the months in which tests were performed, using the parameter code TGP3B for the pass/fail results and THP3B
for the Chronic Value. Additionally, DWQ Form AT-3 (original) is to be sent to the following address:
Attention: NC DENR / DWQ / Environmental Sciences Section
1621 Mail Service Center
Raleigh, North Carolina 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, accurate, include all supporting chemical/physical measurements and all concentration/response
data, and be certified by laboratory supervisor and ORC or approved designate signature. 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 Branch at the address cited above.
Should the Permittee fail to monitor during a month in which toxicity monitoring is required, monitoring will be required during
the following month.
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.
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.

Permit NC0021873
A. (7.) QUARTERLY CHRONIC TOXICITY PERMIT LIMIT - (4.5 MGD)
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to Ceriodaphnia
dubia at an effluent concentration of 9%.
The permit holder shall perform at a minimum, quarterly monitoring using test procedures outlined in the "North Carolina
Ceriodaphnia Chronic Effluent Bioassay Procedure," Revised February 1998, or subsequent versions or "North Carolina Phase
II Chronic Whole Effluent Toxicity Test Procedure" (Revised -February 1998) or subsequent versions. The tests will be
performed during the months of March, June, September and December. Effluent sampling for this testing shall be
performed at the NPDES permitted final effluent discharge below all treatment processes.
If the test procedure performed as the first test of any single quarter results in a failure or ChV below the permit limit, then
multiple -concentration testing shall be performed at a minimum, in each of the two following months as described in "North
Carolina Phase 11 Chronic Whole Effluent Toxicity Test Procedure" (Revised -February 1998) or subsequent versions.
The chronic value for multiple concentration tests will be determined using the geometric mean of the highest concentration
having no detectable impairment of reproduction or survival and the lowest concentration that does have a detectable
impairment of reproduction or survival. The definition of "detectable impairment," collection methods, exposure regimes, and
further statistical methods are specified in the "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure"
(Revised -February 1998) or subsequent versions.
All toxicity testing results required as part of this permit condition will be entered on the Effluent Discharge Monitoring Form
(MR-1) for the months in which tests were performed, using the parameter code TGP3B for the pass/fail results and THP3B
for the Chronic Value. Additionally, DWQ Form AT-3 (original) is to be sent to the following address:
Attention: NC DENR / DWQ / Environmental Sciences Section
1621 Mail Service Center
Raleigh, North Carolina 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, accurate, include all supporting chemical/physical measurements and all concentration/response
data, and be certified by laboratory supervisor and ORC or approved designate signature. 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 Branch at the address cited above.
Should the Permittee fail to monitor during a month in which toxicity monitoring is required, monitoring will be required during
the following month.
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.
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.

Permit NC0021873
A. (8.) EFFLUENT PRIORITY POLLUTANT SCAN
The Permittee shall perform an annual Effluent Pollutant Scan for all parameters listed in the attached table (in
accordance with 40 CFR Part 136). Samples shall represent seasonal variations. Unless otherwise indicated,
metals shall be analyzed as "total recoverable."
Ammonia (as N)
Chlorine (total residual, TRC)
Dissolved oxygen
Nitrate/Nitrite
Kjeldahl nitrogen
Oil and grease
Phosphorus
Total dissolved solids
Hardness
Antimony
Arsenic
Beryllium
Cadmium
Chromium
Copper
Lead
Mercury
Nickel
Selenium
Silver
Thallium
Zinc
Cyanide
Total phenolic compounds
Volatile organic compounds:
Acrolein
Acrylonitrile
Benzene
Bromoform
Carbon tetrachloride
Chlorobenzene
Chlorodibromomethane
Chloroethane
2-chloroethylvinyl ether
Chloroform
Dichlorobromomethane
1,1-dichloroethane
1,2-dichloroethane
Trans- 1 ,2-dichloroethylene
1 ,1 -dichloroethylene
1,2-dichloropropane
1,3-dichloropropylene
Ethylbenzene
Methyl bromide
Methyl chloride
Methylene chloride
1,1,2,2-tetrachloroethane
Tetrachloroethylene
Toluene
1,1,1-trichloroethane
1,1,2-trichloroethane
Trichloroethylene
Vinyl chloride
Acid -extractable compounds:
P-chloro-m-cresol
2-chlorophenol
2,4-dichlorophenol
2,4-dimethylphenol
4,6-dinitro-o-cresol
2,4-dinitrophenol
2-nitrophenol
4-nitrophenol
Pentachlorophenol
Phenol
2,4,6-trichlorophenol
Base -neutral compounds:
Acenaphthene
Acenaphthylene
Anthracene
Benzidine
Benzo(a)anthracene
Benzo(a)pyrene
3,4 benzofluoranthene
Benzo(ghi)perylene
Benzo(k)fluoranthene
Bis (2-chloroethoxy) methane
Bis (2-chloroethyl) ether
Bis (2-chloroisopropyl) ether
Bis (2-ethylhexyl) phthalate
4-bromophenyl phenyl ether
Butyl benzyl phthalate
2-chloronaphthalene
4-chlorophenyl phenyl ether
Chrysene
Di-n-butyl phthalate
Di-n-octyl phthalate
Dibenzo(a,h)anthracene
1,2-dichlorobenzene
1,3-dichlorobenzene
1,4-dichlorobenzene
3,3-dichlorobenzidine
Diethyl phthalate
Dimethyl phthalate
2,4-dinitrotoluene
2,6-dinitrotoluene
1,2-diphenylhydrazine
Fluoranthene
Fluorene
Hexachlorobenzene
Hexachlorobutadiene
Hexachlorocyclo-pentadiene
Hexachloroethane
Indeno(1,2,3-cd)pyrene
Isophorone
Naphthalene
Nitrobenzene
N-nitrosodi-n-propylamine
N-nitrosodimethylamine
N-nitrosodiphenylamine
Phenanthrene
Pyrene
1,2,4-trichlorobenzene
Test results shall be reported to the Division in DWQ Form- DMR-PPA1 or in a form approved by the Director,
within 90 days of sampling. A copy of the report shall be submitted to Central Files to the following address:
Division of Water Quality, Water Quality Section/Central Files, 1617 Mail Service Center, Raleigh, North
Carolina 27699-1617.

DENR/DWQ
FACT SHEET
FOR NPDES PERMIT DEVELOPMENT
NPDES NC0021873
Introduction
The Town of Mayodan Wastewater Treatment Plant (WWTP), herein called Mayodan or the Permittee,
requires a National Pollutant Discharge Elimination System (NPDES) permit to dispose treated wastewater to
the surface waters of the state. The Permittee's 5-year NPDES permit expired May 31, 2007 and they have
requested renewal from the Division of Water Quality (the Division). This Fact Sheet summarizes background
information and rationale used by the Division's NPDES Unit to determine permit limits and monitoring
conditions.
Existing Treatment System. As a regional facility, Mayodan services 2,505 local residents plus industry, and
receives industrial and domestic influent flow from the towns of Stoneville (1,118 residents) and Madison
(2,423 residents). During the previous permit cycle, the Permittee upgraded the WWTP from 3.0 MGD to 4.5
MGD by expanding the headworks and constructing an additional aeration basin, clarifier, an aerobic digester,
and a chlorine contact basin, in accordance with ATC 021873A02 (Engineer's Certification received from
Hobbs Upchurch & Associates, P.A., December 17, 2004).
Table 1
Facility Summar
General Information
Applicant/Facility Name:
Town of Mayodan WWTP
Applicant Address:
210 W. Main Street, Mayodan, NC 27027
Facility Address:
293 Caldwell Road, Mayodan, NC 27027
Permitted Flow (Compliance
keyed on 80 % of tiered flow)
2.5 MGD (Proposed this renewal — down -sizing)
3.0 MGD (existing)
4.5 MGD (existing)
Type of Waste:
Domestic and Industrial
Facility Classification:
Class III (Proposed) Class IV (Existing)
Permit Status:
Renewal / Down -sizing
County:
Rockingham
Discharge Location and Conditions
Receiving Stream
Mayo River
Regional Office:
W-SRO
Stream Classification
C
State Grid
B 19 NW
303(d) Listed?
No
USGS Quad:
Mayodan, NC
Basin
Roanoke
Permit Writer:
Joe Corporon
Subbasin
030202
Date:
06Aug07
Drainage Area (mi2)
312
. w►
:.
Lat. 36° 24' 25" N Long. 79° 57' 56" W
Summer 7Q10 (cfs)
75
Winter 7Q10 (cfs):
131
30Q2 (cfs)150'�•
Average Flow (cfs)
362
IWC (%)
4.9 % (proposed)
6 % (existing)
8.5% (existing)
Fact Sheet
NPDES NC0021873
Renewal
Page 1

Facility Records Review
Permittee's Renewal Application and Request to Downsize. The current permit expired on May 31, 2007. The
Division received the Permittee's request to renew the permit (EPA Form 2A) on January 23, 2007. With the
recent loss of a major textile industry, the Permittee's average influent flow has significant decrease to about
0.600 MGD with no replacement influent pending. The Permittee has therefore requested the Division to lower the
permitted flow rate and to modify the existing flow -tiered permit to accommodate 2.5 MGD appropriate to this
downsizing.
Regional Office Staff Report. Winston-Salem Regional Office (W-SRO) inspector David Russell conducted an
annual facility inspection and prepared a Staff Report dated October 30, 2006. Russell verified the loss of
industrial influent and noted that, because of the lower flow rate, this facility provides excellent wastewater
treatment. W-SRO concurs with this downsizing, recommends that the Division renew this permit in accord with
the Basin Plan.
Waste Load Allocation (WLA). The Division prepared the last WLA for the receiving stream and developed
effluent limits and monitoring requirements considering an in -stream waste concentration (IWC) of 4.91 % (2.5
MGD), 5.84 % (at 3.0 MGD), and 8.51 % (at 4.5 MGD). For Whole Effluent Toxicity testing and Reasonable
Potential Analysis, these IWCs have been rounded up to 5%, 6%, and 9%, respectively. The Division views these
limits and monitoring requirements appropriate for renewal except as outlined below (see Renewal Summary).
Existing Stream Conditions. The Permittee discharges to the Mayo River [Stream Index 22-30-(10)], this
segment a Class C waterbody within the Roanoke River Basin. The Mayo River is not listed on North Carolina's
303d list of impaired waters (DRAFT 2006).
Pre-treatment: Mayodan has an approved Pretreatment Program under federal and state regulations (40CF1( 403
and NC State 15A NCAC 2H.0900), and this program will continue with renewal. Mayodan is a regional WWTP
serving the towns of Mayodan, Stoneville, and Madison. Mayodan regulates all Significant Industrial Users (SIUs)
in its service area, currently totaling four Sills.
DMR Effluent Data Review and the Basin Plan. Mayodan's monthly Discharge Monitoring Reports (DMRs)
appear regular, thorough, and complete. The Division compared effluent flow rates from January 2004 through
June 2007. The Division also evaluated data for metals and toxicants during the same time period (see Reasonable
Potential Analysis). The Mayo River is classified as Good for benthic microinvertebrates near the NC -VA border
and is classified as Good -Fair downstream of the discharge at the confluence with the Dan River.
Whole Effluent Toxicity The permit has a requirement for a quarterly chronic toxicity test at 9 % using
ceriodaphnia. They failed one test in 2000. The Division reviewed Mayodan's quarterly Whole Effluent Toxicity
records from January 2003 through March 2007 (17 quarterly tests). Mayodan passed all toxicity testing.during
this 4%z-year period. The Permittee also conducted second -species WET testing during the months of Dec04,
Mar05, and Jun06. All test results were reported as "pass."
PERMIT RENEWAL
In response to the Permittee's request to downsize, the Division proposes to re-classify this WWTP, and has
drafted a three -tiered permit for flows of 2.5 MGD (Class III), 3.0 MGD (Class IV), and 4.5 MGD (Class IV),
considering "as built" facilities. When the 12-month flow average reaches 80 % of a given tier maximum, the
Permittee's compliance automatically upgrades to the next tier and is not reversible without a formal permit
modification.
Fact Sheet
NPDES NC0021873
Renewal
Page 2

Chronic Reasonable Potential Analysis (RPA). To establish a list of pollutants of concern (POCs), the
Division examined the permit application, pretreatment data, DMRs (2004 through 2007), and the Basin Plan.
The Division conducted the RPA for each proposed flow of 2.5 MGD, 3.0 MGD, and 4.5 MGD to calculate a
maximum predicted concentration for each POC (see attached RPA Summary sheets). Each maximum was then
compared to the POC's freshwater Standard or allowable concentration (Tables 2, 3, and 4). If by this method, a
POC showed reasonable potential (RP) to exceed its Standard or criteria, the Division included a permit limit as
a Weekly Average to protect against chronic toxicity impacts.
Acute RPA. Similar to the Chronic RPA, the Division compared each POC's maximum predicted concentration
to the freshwater Final Acute Value (%2 FAV) to establish the potential for acute toxicity (Tables 2, 3, and 4).
The acute RPA does not consider dilution. If by this method, a POC showed reasonable potential to exceed its
freshwater 1/2 FAV/CMC, the Division included this allowable concentration as a permit limit Daily Maximum
to protect the receiving stream against acute toxic affects.
Table 2 RPA - 2.5 MGD (nronosed new flow limit
Parameter
Chronic
Allowable
(µPS)
Acute
Allowable
(µme)
Maximum
Predicted
(µgfL)
RP
OUN)
Comments
Arsenic
4,721
N/A
17
N
No action required.
Cadmium
41
15
7
N
No action required.
Chromium
1,018
1,022
7
N
No action required.
Copper
142
7.3
160
Y
Action Level parameter — no apparent
toxicity therefore monitor only.
Cyanide
102
22
—
—
Not detected in 17 samples.
Lead
509
34
238
Y
Added 2/Month monitoring and limit as
Daily Maximum (Acute RP only)
Mercury
244 ng/L
N/A
180 ng/L
N
No action required.
Nickel
1,791
261
—
—
Not detected in 17 samples.
Selenium
102
56
206
Y
Added both acute (Daily Maximum) and
chronic (Weekly Average) limits with
1/Week monitoring.
Silver
1.2
1.2
73
Y
Action Level parameter — no apparent
toxicity therefore monitor only.
Zinc
1,018
67
315
Y
Action Level parameter — no apparent
toxicity therefore monitor only.
Table 3
RPA -3.0MGD
Parameter
Chronic
Allowable
(µme)
Acute
Allowable
Olga)
Maximum
RP
(YUN)
Comments
Predicted
(µg)
Arsenic
3,942
N/A
17
N
No changes to permit
Cadmium
34
15
7
N
No changes to permit
Chromium
856
1,022
18
N
No changes to permit
Copper
120
7.3
160
Y
Action Level parameter — no apparent
toxicity therefore monitor only.
Cyanide
86
22
—
—
_
Not detected in 17 samples.
Lead
428
34
238
_
y
Added 2/Month monitoring and limit as
Daily Maximum (Acute RP only)
Mercury
206 ng/L
N/A
180 ng/L
N
Delete permit limit; change monitoring
to 2/Month by EPA Method 1631E.
Fact Sheet
NPDES NC0021873
Renewal
Page 3

Nickel
1,791
261
—
—
Not detected in 17 samples.
Selenium
86
56
206
Y
Added both acute (Daily Maximum) and
chronic (Weekly Average) limits with
1/Week monitoring.
Silver
1.0
1.2
73
Y
Action Level parameter — no apparent
toxicity therefore monitor only.
Zinc
856
67
315
Y
Action Level parameter — no apparent
toxicity therefore monitor only.
Table 4
RPA - 4.5 MGD
Parameter
Chronic
Allowable
WA)
Acute
Allowable
(RAW
Maximum
Predicted
(µme)
RP
MN)
Comments
Arsenic
2,645
N/A
17
N
No changes to permit
Cadmium
24
15
7
N
No changes to permit
Chromium
588
1,022
18
N
No changes to permit
Copper
82
7.3
160
Y
Action Level parameter — no apparent
toxicity therefore monitor only.
Cyanide
59
22
—
—
Not detected in 17 samples.
Lead
294
34
238
Y
Added 2/Month monitoring and limit as
Daily Maximum (Acute RP only)
Mercury
141 ng/L
N/A
180 ng/L
Y
Added 2/Month monitoring and limit as
Daily Maximum (Acute RP only)
Nickel
1,034
261
—
—
Not detected in 17 samples.
Selenium
59
56
206
Y
Added both acute (Daily Maximum) and
chronic (Weekly Average) limits with
1/Week monitoring.
Silver
0.7
1.2
73
Y
Action Level parameter — no apparent
toxicity therefore monitor only.
Zinc
588
67
315
Y
Action Level parameter — no apparent
toxicity therefore monitor only.
RENEWAL SUMMARY
• Added effluent table for 2.5 MGD; added monitoring for copper, lead, selenium, silver, and zinc, based on
RPA. Added limits for Total Lead (Daily Max only) and Total Selenium (Weekly Ave and Daily Max),
based on both acute and chronic standards RPA.
• Based on the RPA at 3.0 MGD, added monitoring for lead, selenium, silver, and zinc; added limits for Total
Lead (Daily Max only) and Total Selenium (both Weekly Average and Daily Max), based on standards RPA.
• Based on the RPA at 4.5 MGD, added monitoring for selenium, lead and silver; added permit limits for
Total Lead (Daily Max only) and Total Selenium (both Weekly Average and Daily Max) based on
standards RPA.
• Instream Monitoring - no changes recommended.
Fact Sheet
NPDES NC0021873
Renewal
Page 4

FILE CONTENTS:
Left de:
IMS Tracking Slip
Q' This Check List
Right side:
❑ Streamline Package Sheet
L�/ Draft Permit Cover Letter.
Draft Permit
E Facility Map
C� Fact Sheet.
❑ Permit Writer's Notes
13'.. Staff Report from Region
12V Old Permit
Er Permit Application.
LEK Acknowledgement Letter
❑ Permittee Responses
O Waste Load Allocation
Note: Italics indicate special
NPDES PERMIT
DRAFT & FINAL
CHECK LIST
br 17/I-VOA A--/J
Facility
Permit No.
1\1e66ak IfieV
NPDES Permit Writer:
(to region, only if stre. lined)
(add new policy to summarize majo
(order: cover, su ► ' lement, map, e
(E-Map: incl e facility Outfalls•
(Document • permit writer's re -
(if ► of i acts Sheet - chron
(a - a . • ropriate - not neede
(Text, Effluent Sheets and Special Conditions)
(New Permit or Renewal; any additional permittee correspondence)
(NPDES Unit written response to Renewal Application)
(to acknowledgement letter, if any)
(reference date; notes if recalculated for current action)
conditions not always required or applicable.
changes to permit)
ent sheets, special conditions)
and D sample locations)
suance logic; RPA data attached (?)
ogy, strategy, DMR Review, RPA, etc.)
if expedited)
Submitted to -- - H' • for Peer Review: Date l��`t ��"Z-Admin cutoff date I.SIWG0?---
E Peer Review completed by
Updated Public Notice System [date]
ai Submitted for Public Notice on
c7 Draft Permit [Mailed /
Date All
/fA . Updated BIMS Events).- [d te]
ksvci 2‘SF
. Newspaper Notice Received . ctual Notice date(s)
led to (Regional Staft) k3I.-4 �S '- by
O Regional Office Review /Approval completed by . Received on [Date]
Additional Review by
EH] SJ ste. M Vi06,0)5 initiated by
Date 1A1-6)-
N>C7- Date ic(A OW"
O Additional Review/Approval completed by _ Date
EPA Review Draft sent to f I Q. k\ c(_ 'Ay initiated by
O EPA Review /Approval [mail / E-mail] completed by Date Received
O FINAL to Mike / Susan / Tom / Gil for signature on c - Letter Dated
a dditional Review [other]" x` 1 1 CL61
Final Files transferred to Server (Permits Folder) D� SOT P- . BIMS Final Updates: Events Limits
Date (T�v
Version 8/14/2007
3- et\inid

09/26/2007 10:10 13363422513
RVILLEREVIEW
PAGE 03/03
be eibisbille ebte
1921 VANCE STREET P.O. BOX 2157 REIDSVILLE, NC 27320 336-349-4331
wltuc itnlri • .
Mintpf NOTethf CAROMMA
¢NVIRONMENTAU MANAGEMENT
COMMISSION/NDDES UNIT •
1617 MAIL SERVIcZ CENTER •
, RALEIGH, NC2769971617 •
NOttIFICATION OF INTENT TO ISSUE A
NPDESWASTEWATER PERMIT •
On the bask of lhblbu h staff review and
appllta1IOn At NC General Statute 143.21;.
Public law 92.500 and tither lawlul stimdanis
anti regulatIb e; thd•NortltCarolina
Eprnvlronfnental ManasNaethent Commfisldn
Discharlge ElltInatlohsystem (NPDES)
wasteWeter.dIscharpt?pttthlttothe
pl:rson(s) listed Below effective 45 days
from the publish nate of talk nolltc.•
Written comments re artlingC the proposed
permit will be accepted Until 30 days after
the pUbflshdate Of thle notico. All continents
retclved Drlorrtl that tlHtd tire considered In .
thefinalddotefnifttatlons regardingthe
Divisional Waa1 r• uaIItDirector of
de NC hold
a public meeting for the proposed permit
should the Division retelve a significant
degree of public Interest.
Copies of the draft pemilf nd other
suppdrrIng Information on file used to
determine corI1yditlbns present In Um draft:
permitnre.vallkhicupoprnquostand
payment 01 tho obits of rtProductlon. Mall
continents and/or )oGGdects for Information
to the NC.DIVlslort of Water•QUallty at the`
above address br taII.Ms, Framer Cendelarla
(9193733.5083;;titt. 520 at the Point Source
Branch. VIet19a Include the NPDES pertlt
number (attached) In any .cbmmunlcatioh.•
IntetestOd ppersons may aistf visit the •. •
DlvkSlon df Water. Quality at 512 N.. Sallabury
Street:Raleigh, NC 27684.1148 between the
hours of 8:00am and.5:0opm fb reviewIhfbrmatIod of Nr. . • • •
The ToWn or fdayddan AnArTP.(N000./M9731 has
requested to rcncW Its NPDEggell tit tbc-
dlschergp tred(d wastowateV..td-the M6yd•-:- •
RIVer located with the RnaAoke Rlver.Basln,
The parameters ammonla. fecal coliforttrl ; • .
Total Lead. Total Mercury; Total Sclenharl,
and TdtA1 Residual Chlorine ere water-obailty
•Jlmited. this discharge may affectfutUrd
""Stastelond agncatIons to the recdfving.
ream.
August 17, 2007 •
AFFIDAVIT OF PUBLIC:ATION
NORTH CAROLINA
ROCKINGHAM COUNTY
Before the undersigned, a Notary Public of Said
County and State, duly commissioned, qualified, and
authorized by law to administer oaths, personally appeared
Dreama Armstrong, who being first duly swom, deposes
and says. That'• she is an official of Media General of
Reidsville, Inc. engaged in the publication of a newspaper
known as The Reidsville .Review, published, issued and
entered as second class mail in the City of Reidsville, .in
said County and State; that 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 The Reidsville Review on the following dates:
u‘5i 0, ,2 7
and that the said newspaper in which .such notice, paper
document, or legal advertisement was published was, at the
lime of each and every such publication, a newspaper meet-
ing all of the requirements and qualifications of Section I-
597 of the General Statutes of North Carolina and 'was
qualified newspaper within the meaning of Section 1-597 of
the General Statutes of North C ina.
This 6 d o 40th-V-
Sworn to ar d slbscribed before me, this
day of 01-joTe,fiLb,CA-1 c2
0trrrurrr,y
0' S . T EMp�'to /n-�
:'�`�' ccj• LVC ` P - . •- '1` �Qi- ( ': i : -Notary Public
O�
co �p T A /�y Z. ; e.) I? �Cc c.es
My commission exprires the .) day 17 :�L-i• l
o pUg��G c..c
'.,NAMCO'''

IWC Calculations
Town of Mayodan
NC0021873
Prepared By: Joe Corporon, NPDES Unit
Enter Design Flow (MGD):
Enter s7Q10(cfs):
Enter w7Q10 (cfs):
2.5
75
131
Residual Chlorine
7Q10 (CFS)
DESIGN FLOW (MGD)
DESIGN FLOW (CFS)
STREAM STD (UG/L)
UPS BACKGROUND LEVEL (I
IWC (%)
Allowable Conc. (ug/I)
Fecal Limit
(If DF >331; Monitor)
(If DF <331; Limit)
Dilution Factor (DF)
NPDES Servor/Current Versions/IWC
Ammonia (NH3 as N)
(summer)
75 7Q10 (CFS)
2.5 DESIGN FLOW (MGD)
3.875 DESIGN FLOW (CFS)
17.0 STREAM STD (MG/L)
0 UPS BACKGROUND LEVEL
4.91 IWC (%)
346 Allowable Conc. (mg/I)
200/100mI
20.35
Ammonia (NH3 as N)
(winter)
7Q10 (CFS)
DESIGN FLOW (MGD)
DESIGN FLOW (CFS)
STREAM STD (MG/L)
UPS BACKGROUND LEVEL
IWC (%)
Allowable Conc. (mg/I)
75
2.5
3.875
1.0
0.22
4.91
16.1
131
2.5
3.875
1.8
0.22
2.87
55.2
8/8/2007

IWC Calculations
Town of Mayodan
NC0021873
Prepared By: Joe Corporon, NPDES Unit
Enter Design Flow (MGD):
Enter s7Q10(cfs):
Enter w7Q10 (cfs):
3.0
75
131
Residual Chlorine
7Q10 (CFS)
DESIGN FLOW (MGD)
DESIGN FLOW (CFS)
STREAM STD (UG/L)
UPS BACKGROUND LEVEL (I
IWC (%)
Allowable Conc. (ug/I)
Fecal Limit
(If DF >331; Monitor)
(If DF <331; Limit)
Dilution Factor (DF)
NPDES Servor/Current Versions/IWC
Ammonia (NH3 as N)
(summer)
75 7Q10 (CFS)
3 DESIGN FLOW (MGD)
4.65 DESIGN FLOW (CFS)
17.0 STREAM STD (MG/L)
0 UPS BACKGROUND LEVEL
5.84 IWC (%)
291 Allowable Conc. (mg/I)
200/100m1
17.13
Ammonia (NH3 as N)
(winter)
7010 (CFS)
DESIGN FLOW (MGD)
DESIGN FLOW (CFS)
STREAM STD (MG/L)
UPS BACKGROUND LEVEL
IWC (%)
Allowable Conc. (mg/I)
75
3
4.65
1.0
0.22
5.84
13.6
131
3
4.65
1.8
0.22
3.43
46.3
8/13/2007

IWC Calculations
Town of Mayodan
NC0021873
Prepared By: Joe Corporon, NPDES Unit
Enter Design Flow (MGD):
Enter s7Q10(cfs).
Enter w7Q10 (cfs):
4.5
75
131
Residual Chlorine
7Q10 (CFS)
DESIGN FLOW (MGD)
DESIGN FLOW (CFS)
STREAM STD (UG/L)
UPS BACKGROUND LEVEL (I
IWC (%)
Allowable Conc. (ug/I)
Fecal Limit
(If DF >331; Monitor)
(If DF <331; Limit)
Dilution Factor (DF)
NPDES Servor/Current Versions/IWC
Ammonia (NH3 as N)
(summer)
75 7010 (CFS)
4.5 DESIGN FLOW (MGD)
6.975 DESIGN FLOW (CFS)
17.0 STREAM STD (MG/L)
0 UPS BACKGROUND LEVEL
8.51 IWC (%)
200 Allowable Conc. (mg/I)
200/100mI
11.75
Ammonia (NH3 as N)
(winter)
7Q10 (CFS)
DESIGN FLOW (MGD)
DESIGN FLOW (CFS)
STREAM STD (MG/L)
UPS BACKGROUND LEVEL
IWC (%)
Allowable Conc. (mg/I)
75
4.5
6.975
1.0
0.22
8.51
9.4
131
4.5
6.975
1.8
0.22
5.06
31.5
8/13/2007

To: Permits and Engineering Unit
Water Quality Section
Attention:3harles Weaver Z
Date: October 30, 2006 ,/
NPDES STAFF REPORT AND RECOMMENDATION
County: Rockingham
Permit No. NC0021873 ✓
PART I - GENERAL INFORMATION
• 1. Facility and Address: Town of Mayodan WWTP
210 West Main Street
Mayodan, NC 27027
2. Date of Investigation: September 20, 2005 (at WWTP)
3. Report Prepared by: David Russell
4. Persons Contacted and Telephone Number: Jamie Whitten- [phone]
J
rjt:CE B J$,NC:-1
5. Directions to Site: From Business 220 in Mayodan travel HWY 135E appx 1 mile, turn
right on Cardwell Road, WWTP is at the end of the road.
6. Discharge Points(s), List for all discharge points:
Latitude: 36 24 25 Longitude: 79 57 56
U.S.G.S. Quad No. B19NW U.S.G.S. Quad Name Mayodan
7. Site size and expansion area consistent with application?
No If No, explain:
8. Topography (relationship to flood plain included): The WWTP is located above the
flood plain.
9. Location of nearest dwelling: Nothing within 1000'.
10. Receiving stream or affected surface waters: Mayo River
a. Classification: C
b. River Basin and Subbasin No.: 030202 tr
c. Describe receiving stream features and pertinent downstream uses:
Approximatelyl %2 miles below the discharge the Mayo River enters the Dan
River.

Part II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
1. a. Volume of Wastewater to be permitted: 4.5 MGD (Ultimate Design Capacity)
b. What is the current permitted capacity of the Waste Water Treatment facility?
same
c. Actual treatment capacity of the current facility (current design capacity)?
same
d. Date(s) of construction activities allowed by previous Authorizations to Construct
issued in the previous two years. NA
e. Please provide a description of existing or substantially constructed wastewater
treatment facilities: Influent pumps, bar screen, digestors, aeration basins,
clarifier, chlorination, dechlorination, sludge storage basins, drying beds, flow
meter.
f. Please provide a description of proposed wastewater treatment facilities. N/A
g. Possible toxic impacts to surface waters: N/A
h. Pretreatment Program (POTWs only): approved
2. Residuals handling and utilization/disposal scheme:
a. If residuals are to be land applied, please specify DEM permit no. WQ0002672
Residuals Contractor: Southern Soil Builders
b. Results Stabilization:
c. Landfill: N/A
d. Other disposal/utilization scheme (specify):
3. Treatment plant classification. (attach completed rating sheet).
4. SIC Code(s): 4952
Primary 01 Secondary 55
Main Treatment Unit Code: 050-3
NPDES Permit Staff Report
Version 10/92
Page 2

PART III - OTHER PERTINENT INFORMATION
1. Is this facility being constructed with Construction Grant Funds or are any public monies
involved. (municipals only)? NA
2. Special monitoring or limitations (including toxicity) requests:
3. Important SOC, JOC or Compliance Schedule dates: (Please indicate) NA
Submission of Plans and Specifications
Begin Construction
Complete Construction
4. Alternative Analysis Evaluation: Has the facility evaluated all of the non -discharge
options available. Please provide regional perspective for each option evaluated.
Spray Irrigation: n/a
Connection to Regional Sewer System: n/a
Subsurface: n/a
Other disposal options: n/a
5. Other Special Items:
PART IV - EVALUATION AND RECOMMENDATIONS
This WWTP was expanded to 4.5 mgd in July 2004. The towns of Madison and
Stoneville were tied into Mayodan collection system. Even with these additions, the Mayodan
NPDES Permit Staff Report
Version 10/92
Page 3

WWTP has averaged approximately 1 mgd for the past year. Much industrial (textile)
wastewater flow has been lost. Due to the low flows only a part of the system is operated. The
system provides excellent treatment. It is my recommendation that the permit be renewed.
Signature of port prepare
a
Water Quality Regional Supervisor
/off` e-ab
Date
cc: Permits and Engineering
Technical Support Branch
County Health Dept.
Central Files
WSRO
NPDES Permit Staff Report
Version 10/92
19)4" /2/7/oi
Page 4

TOWN OF MAYODAN OFFICE OF THE TOWN MANAGER
210 W. MAIN STREET • MAYODAN, N.C. 27027 • [phone]
FAX [phone]
[e-mail]
January 23, 2007
NCDENR/DWQ
NPDES Unit
1617 Mail Service Center
Raleigh, NC 27699-1617
RE: NC0021873
Dear Mr. Weaver,
Enclosed is the permit renewal application for the Town of Mayodan WWTP.
If you have any questions, please advise.
Sincerely,
Town of Mayodan
Olko_ L _ CjcLi1L
Debra Cardwell
Town Manager

FACILITY NAME AND PERMIT NUMBER:
Mayodan WWTP NC0021873
PERMIT ACTION REQUESTED:
Renewal
RIVER BASIN:
Ronoake
SUPPLEMENTAL APPLICATION INFORMATION
PART F.INDUSTRIAL USER DISCHARGES AND RCRA/CERCLA WASTES
All treatment works receiving discharges from significant industrial users
complete part F.
GENERAL INFORMATION:
or which receive RCRA,CERCLA,
ot, an approved pretreatment program?
Users (ClUs). Provide the number
or other remedial wastes must
of each of the following types of
questions F.3 through F.8 and
F.1. Pretreatment program. Does the treatment works have, or is subject
Z Yes ❑ No
F.2. Number of Significant Industrial Users (SIUs) and Categorical Industrial
industrial users that discharge to the treatment works.
a. Number of non -categorical SIUs. 4
b. Number of CIUs. 0
SIGNIFICANT INDUSTRIAL USER INFORMATION:
to the treatment works, copy
Supply the following information for each SIU. If more than one SIU discharges
provide the information requested for each SIU.
F.3. Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages
as necessary.
Name: Glass Dynamics
Mailing Address: 8901 US 220 Bypass
Stoneville, NC 27048
F.4. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Cut. grind. polish glass for use in furniture
F.5. Principal Product(s) and Raw Material(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's
discharge.
Principal product(s): Glass table tops, custom glass, insluated glass, architectual glass
Raw material(s): Glass, corregated packing, water, colants, cerrium oxide
F.6. Flow Rate.
a. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into
day (gpd) and whether the discharge is continuous or intermittent.
0.0044 gpd ( X continuous or intermittent)
the collection system in gallons per
into the collection system
b. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow discharged
in gallons per day (gpd) and whether the discharge is continuous or intermittent.
gpd ( continuous or intermittent)
F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following:
a. Local limits I] Yes ❑ No
b. Categorical pretreatment standards ❑ Yes [] No
If subject to categorical pretreatment standards, which category and subcategory?
NPDES FORM 2A Additional Information

FACILITY NAME AND PERMIT NUMBER:
Mayodan WWTP , NC0021873
PERMIT ACTION REQUESTED:
Renewal
RIVER BASIN:
Ronoake
F.8. Problems at the Treatment Works Attributed to Waste Discharge by the SIU. Has the SIU caused or contributed to any problems (e.g.,
upsets, interference) at the treatment works in the past three years?
0 Yes i] No If yes, describe each episode.
RCRA HAZARDOUS WASTE RECEIVED BY TRUCK, RAIL, OR DEDICATED PIPELINE:
F.9. RCRA Waste. Does the treatment works receive or has it in the past three years received RCRA hazardous waste by truck, rail or dedicated pipe?
0 Yes Z No (go to F.12)
F.10. Waste transport. Method by which RCRA waste is received (check all that apply):
0 Truck 0 Rail ❑ Dedicated Pipe
F.11. Waste Description. Give EPA hazardous waste number and amount (volume or mass, specify units).
EPA Hazardous Waste Number Amount Units
CERCLA (SUPERFUND) WASTEWATER, RCRA REMEDIATION/CORRECTIVE ACTION
WASTEWATER, AND OTHER REMEDIAL ACTIVITY WASTEWATER:
F.12. Remediation Waste. Does the treatment works currently (or has it been notified that it will) receive waste from remedial activities?
❑ Yes (complete F.13 through F.15.) ❑ No
F.13. Waste Origin. Describe the site and type of facility at which the CERCLA/RCRA/or other remedial waste originates (or is excepted to origniate in
the next five years).
F.14. Pollutants. List the hazardous constituents that are received (or are expected to be received). Include data on volume and concentration, if
known. (Attach additional sheets if necessary.)
F_15. Waste Treatment.
a. Is this waste treated (or will be treated) prior to entering the treatment works?
❑ Yes 0 No
If yes, describe the treatment (provide information about the removal efficiency):
b. Is the discharge (or will the discharge be) continuous or intermittent?
0 Continuous 0 Intermittent If intermittent, describe discharge schedule.
END OF PART F.
REFER TO THE APPLICATION OVERVIEW (PAGE 1) TO DETERMINE WHICH OTHER PARTS
OF FORM 2A YOU MUST COMPLETE
NPDES FORM 2A Additional Information

FACILITY NAME AND PERMIT NUMBER:
Mayodan WWTP , NC0021873
PERMIT ACTION REQUESTED:
Renewal
RIVER BASIN:
Ronoake
SUPPLEMENTAL APPLICATION INFORMATION
PART F.INDUSTRIAL USER DISCHARGES AND RCRAICERCLA WASTES
All treatment works receiving discharges from significant industrial users
complete part F.
GENERAL INFORMATION:
or which receive RCRA,CERCLA,
ot, an approved pretreatment program?
Users (ClUs). Provide the number
or other remedial wastes must
of each of the following types of
questions F.3 through F.8 and
F.1. Pretreatment program. Does the treatment works have, or is subject
El Yes ❑ No
F.2. Number of Significant Industrial Users (Sills) and Categorical Industrial
industrial users that discharge to the treatment works.
c. Number of non -categorical SIUs. 4
d. Number of CIUs. 0
SIGNIFICANT INDUSTRIAL USER INFORMATION:
to the treatment works, copy
Supply the following information for each SIU. If more than one SIU discharges
provide the information requested for each SIU.
F.3. Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages
as necessary.
Name: Unifi Sans
Mailing Address: PO Box 1437
Reidsville. NC 27323
F.4. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Melting and extruding nylon chip into fiber
F.5. Principal Product(s) and Raw Material(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's
discharge.
Principal product(s): Spun nylon fiber
Rawmaterial(s): Nylon 6, 6 chip, 10-12% mineral oil, heat transfer mediums
F.6. Flow Rate.
c. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into
day (gpd) and whether the discharge is continuous or intermittent.
0.0286 gpd ( X continuous or intermittent)
the collection system in gallons per
into the collection system
d. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow discharged
in gallons per day (gpd) and whether the discharge is continuous or intermittent.
gpd ( continuous or intermittent)
F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following:
a. Local limits Z Yes ❑ No
b. Categorical pretreatment standards ❑ Yes CI No
If subject to categorical pretreatment standards, which category and subcategory?
NPDES FORM 2A Additional Information

FACILITY NAME AND PERMIT NUMBER:
Mayodan WWTP NC0021873
PERMIT ACTION REQUESTED:
Renewal
RIVER BASIN:
Ronoake
F.8. Problems at the Treatment Works Attributed to Waste Discharge by the SIU. Has the SIU caused or contributed to any problems (e.g.,
upsets, interference) at the treatment works in the past three years?
❑ Yes t] No If yes, describe each episode.
RCRA HAZARDOUS WASTE RECEIVED BY TRUCK, RAIL, OR DEDICATED PIPELINE:
F.9. RCRA Waste. Does the treatment works receive or has it in the past three years received RCRA hazardous waste by truck, rail or dedicated pipe?
❑ Yes ❑ No (go to F.12)
F.10. Waste transport. Method by which RCRA waste is received (check all that apply):
❑ Truck ❑ Rail ❑ Dedicated Pipe
F.11. Waste Description. Give EPA hazardous waste number and amount (volume or mass, specify units).
EPA Hazardous Waste Number Amount Units
CERCLA (SUPERFUND) WASTEWATER, RCRA REMEDIATION/CORRECTIVE ACTION
WASTEWATER, AND OTHER REMEDIAL ACTIVITY WASTEWATER:
F.12. Romedlation Waste. Does the treatment works currently (or has it been notified that it will) receive waste from remedial activities?
❑ Yes (complete F.13 through F.15.) E) No
F.13. Waste Origin. Describe the site and type of facility at which the CERCLA/RCRA/or other remedial waste originates (or is excepted to origniate in
the next five years).
F.14. Pollutants. List the hazardous constituents that are received (or are expected to be received). Include data on volume and concentration, if
known. (Attach additional sheets if necessary.)
F.15. Waste Treatment.
c. Is this waste treated (or will be treated) prior to entering the treatment works?
❑ Yes ❑ No
If yes, describe the treatment (provide information about the removal efficiency):
d. Is the discharge (or will the discharge be) continuous or intermittent?
❑ Continuous ❑ Intermittent If intermittent, describe discharge schedule.
END OF PART F.
REFER TO THE APPLICATION OVERVIEW (PAGE 1) TO DETERMINE WHICH OTHER PARTS
OF FORM 2A YOU MUST COMPLETE
NPDES FORM 2A Additional Information

FACILITY NAME AND PERMIT NUMBER:
Mayodan WWTP NC0021873
PERMIT ACTION REQUESTED:
Renewal
RIVER BASIN:
Ronoake
SUPPLEMENTAL APPLICATION INFORMATION
PART F. INDUSTRIAL USER DISCHARGES AND RCRA/CERCLA WASTES
All treatment works receiving discharges from significant industrial users
complete part F.
GENERAL INFORMATION:
or which receive RCRA,CERCLA,
ot, an approved pretreatment program?
Users (ClUs). Provide the number
or other remedial wastes must
of each of the following types of
questions F.3 through F.8 and
F.1. Pretreatment program. Does the treatment works have, or is subject
❑ Yes ❑ No
F.2. Number of Significant Industrial Users (SIUs) and Categorical Industrial
industrial users that discharge to the treatment works.
e. Number of non -categorical Sills. 4
f. Number of ClUs. 0
SIGNIFICANT INDUSTRIAL USER INFORMATION:
to the treatment works, copy
Supply the following information for each SIU. If more than one SIU discharges
provide the information requested for each SIU.
F.3. Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages
as necessary.
Name: Unifi 104
Mailing Address: PO Box 1437
Reidsville. NC 27323
F.4. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Dye packages of polyester fiber. wind packages of polyester fiber
F.5. Principal Product(s) and Raw Material(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's
discharge.
Principal product(s): Dyed polyester fiber
Raw material(s):
F.6. Flow Rate.
e. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into
day (gpd) and whether the discharge is continuous or intermittent.
0.4694 gpd ( X continuous or intermittent)
the collection system in gallons per
into the collection system
f. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow discharged
in gallons per day (gpd) and whether the discharge is continuous or intermittent.
gpd ( continuous or intermittent)
F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following:
a. Local limits El Yes ❑ No
b. Categorical pretreatment standards ❑ Yes Ej No
If subject to categorical pretreatment standards, which category and subcategory?
NPDES FORM 2A Additional Information

FACILITY NAME AND PERMIT NUMBER:
Mayodan WWTP , NC0021873
PERMIT ACTION REQUESTED:
Renewal
RIVER BASIN:
Ronoake
F.8. Problems at the Treatment Works Attributed to Waste Discharge by the SIU. Has the SIU caused or contributed to any problems (e.g.,
upsets, interference) at the treatment works in the past three years?
❑ Yes ❑ No If yes, describe each episode.
RCRA HAZARDOUS WASTE RECEIVED BY TRUCK, RAIL, OR DEDICATED PIPELINE:
F.9. RCRA Waste. Does the treatment works receive or has it in the past three years received RCRA hazardous waste by truck, rail or dedicated pipe?
❑ Yes (] No (go to F.12)
F.10. Waste transport. Method by which RCRA waste is received (check all that apply):
❑ Truck E Rail ❑ Dedicated Pipe
F.11. Waste Description. Give EPA hazardous waste number and amount (volume or mass, specify units).
EPA Hazardous Waste Number Amount Units
CERCLA (SUPERFUND) WASTEWATER, RCRA REMEDIATION/CORRECTIVE ACTION
WASTEWATER, AND OTHER REMEDIAL ACTIVITY WASTEWATER:
F.12. Remediation Waste. Does the treatment works currently (or has it been notified that it will) receive waste from remedial activities?
❑ Yes (complete F.13 through F.15.) E No
F.13. Waste Origin. Describe the site and type of facility at which the CERCLA/RCRA/or other remedial waste originates (or is excepted to origniate in
the next five years).
F.14. Pollutants. List the hazardous constituents that are received (or are expected to be received). Include data on volume and concentration, if
known. (Attach additional sheets if necessary.)
F.15. Waste Treatment.
e. Is this waste treated (or will be treated) prior to entering the treatment works?
❑ Yes © No
If yes, describe the treatment (provide information about the removal efficiency):
f. Is the discharge (or will the discharge be) continuous or intermittent?
❑ Continuous ❑ Intermittent If intermittent, describe discharge schedule.
END OF PART F.
REFER TO THE APPLICATION OVERVIEW (PAGE 1) TO DETERMINE WHICH OTHER PARTS
OF FORM 2A YOU MUST COMPLETE
NPDES FORM 2A Additional Information

FACILITY NAME AND PERMIT NUMBER:
Mayodan WWTP NC0021873
PERMIT ACTION REQUESTED:
Renewal
RIVER BASIN:
Ronoake
SUPPLEMENTAL APPLICATION INFORMATION
PART F. INDUSTRIAL USER DISCHARGES AND RCRA/CERCLA WASTES
All treatment works receiving discharges from significant industrial users
complete part F.
GENERAL INFORMATION:
or which receive RCRA,CERCLA,
ot, an approved pretreatment program?
Users (Gills). Provide the number
or other remedial wastes must
of each of the following types of
questions F.3 through F.8 and
F.1. Pretreatment program. Does the treatment works have, or is subject
© Yes ❑ No
F.2. Number of Significant Industrial Users (Sills) and Categorical Industrial
industrial users that discharge to the treatment works.
g. Number of non -categorical SlUs. 4
h. Number of ClUs. 0
SIGNIFICANT INDUSTRIAL USER INFORMATION:
to the treatment works, copy
Supply the following Information for each SIU. If more than one SIU discharges
provide the information requested for each SIU.
F.3. Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages
as necessary.
Name: Unifi 105
Mailing Address: PO Box 1437
Reidsville, NC 27323
F.4. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Texturing and covering nyoln fiber
F.5. Principal Product(s) and Raw Material(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's
discharge.
Principal product(s): Textured and covered nylon fiber
Raw material(s): Nylon fiber, coning oil, light mineral oil
F.6. Flow Rate.
g. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into
day (gpd) and whether the discharge is continuous or intermittent.
0.0954 gpd ( X continuous or intermittent)
the collection system in gallons per
into the collection system
h. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow discharged
in gallons per day (gpd) and whether the discharge is continuous or intermittent.
gpd ( continuous or intermittent)
_
F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following:
a. Local limits © Yes ❑ No
b. Categorical pretreatment standards D Yes © No
If subject to categorical pretreatment standards, which category and subcategory?
NPDES FORM 2A Additional Information

FACILITY NAME AND PERMIT NUMBER:
Mayodan WWTP , NC0021873
PERMIT ACTION REQUESTED:
Renewal
RIVER BASIN:
Ronoake
F.8. Problems at the Treatment Works Attributed to Waste Discharge by the SIU. Has the SIU caused or contributed to any problems (e.g.,
upsets, interference) at the treatment works in the past three years?
❑ Yes [) No If yes, describe each episode.
RCRA HAZARDOUS WASTE RECEIVED BY TRUCK, RAIL, OR DEDICATED PIPELINE:
F.9. RCRA Waste. Does the treatment works receive or has it in the past three years received RCRA hazardous waste by truck, rail or dedicated pipe?
❑ Yes S No (go to F.12)
F.10. Waste transport. Method by which RCRA waste is received (check all that apply):
❑ Truck ❑ Rail ❑ Dedicated Pipe
F.11. Waste Description. Give EPA hazardous waste number and amount (volume or mass, specify units).
EPA Hazardous Waste Number Amount Units
CERCLA (SUPERFUND) WASTEWATER, RCRA REMEDIATION/CORRECTIVE ACTION
WASTEWATER, AND OTHER REMEDIAL ACTIVITY WASTEWATER:
F.12. Remediation Waste. Does the treatment works currently (or has it been notified that it will) receive waste from remedial activities?
❑ Yes (complete F.13 through F.15.) ❑ No
F.13. Waste Origin. Describe the site and type of facility at which the CERCLA/RCRA/or other remedial waste originates (or is excepted to origniate in
the next five years).
F.14. Pollutants. List the hazardous constituents that are received (or are expected to be received). Include data on volume and concentration, if
known. (Attach additional sheets if necessary.)
F.15. Waste Treatment.
g. Is this waste treated (or will be treated) prior to entering the treatment works?
❑ Yes 2J No
If yes, describe the treatment (provide information about the removal efficiency):
h. Is the discharge (or will the discharge be) continuous or intermittent?
❑ Continuous ❑ Intermittent If intermittent, describe discharge schedule.
END OF PART F.
REFER TO THE APPLICATION OVERVIEW (PAGE 1) TO DETERMINE WHICH OTHER PARTS
OF FORM 2A YOU MUST COMPLETE
NPDES FORM 2A Additional Information

TOWN OF MAYODAN WW1?
Updated July, 2004
Influent
To
Plant
4-1—
Chlorine
Contact
#1
Influent Bari
Screen
Eiguent
SO2
Bldg
Influent
Pump
Station
Aeration Basins
1.25 MGD Total
4
Sludge
Thickeners
Flow
Meter
Infl
from Unifl
Control
Building
Waste Sludge ,
4
Aeration Basin
1.75 MGD
Return Sludge i•
Digestor
0.400 MG
--
Cl2
SO2
Waste Sludge -Bldg-
.
Chlorine 4
Contact # 3
4.
Chlorine
Contact # 2
4
1
Aeration Basin
1.5 MGD
Clarifier
0.400 MG
Clarifier
0.400 MG
Digestor
0.400 MG

The Town of Mayodan Wastewater Treatment Plant is a 4.5 MGD design capacity facility. The
facility treats a combination of domestic, industrial, and commercial wastewaters. The current
treatment scheme includes a mechanical bar screen, grit removal system, activated sludge and
secondary clarification. The treated effluent is disinfected by chlorination followed by
dechlorination through the use of sulfur dioxide.

WSRO
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NC0021075 Town of Madison
NC0021075 Town of Madison
NC0021075 Town of Madison
NC0021075 Town of Madison
NC0021075 Town of Madison
NC0021075 Town of Madison
NC0021075 Town of Madison
NC0021075 Town of Madison
Horizons Residential Care Ctr
Horizons Residential Care Ctr
Horizons Residential Care Ctr
Horizons Residential Care Ctr
Horizons Residential Care Ctr
Horizons Residential Care Ctr
Horizons Residential Care Ctr
Abington WWTP
Abington WWTP
Abington WWTP
Abington WWTP
Abington WWTP
Gains Way Mobile Home Park
Gains Way Mobile Home Park
Cains Way Mobile Home Park
Gains Way Mobile Home Park
Cains Way Mobile Home Park
Gains Way Mobile Home Park
Cains Way Mobile Home Park
Cains Way Mobile Home Park
Greystone Subdivision WWTP
Greystone Subdivision WWTP
Greystone Subdivision WWTP
Greystone Subdivision WWTP
Greystone Subdivision WWTP
Greystone Subdivision WWTP
Salem Quarters WWTP
Madison WWTP
Madison WWTP
Madison WWTP
Madison WWTP
Madison WWTP
Madison WWTP
Madison WWTP
Madison WWTP
Madison WWTP
Madison WWTP
Madison WWTP
Madison WWTP
Winston-Salem NOV-2004-LV-0368
Winston-Salem NOV-2004-LV-0426
Winston-Salem NOV-2004-LV-0481
Winston-Salem NOV-2004-LV-0508
Winston-Salem NOV-2005-LV-0552
Winston-Salem NOV-2005-PC-0096
Winston-Salem NOV-2006-PC-0203
Winston-Salem LV-2002-0541
Winston-Salem NOV-2004-LV-0221
Winston-Salem
Winston-Salem
Winston-Salem
Winston-Salem
Winston-Salem
Winston-Salem
Winston-Salem
Winston-Salem
Winston-Salem
Winston-Salem
Winston-Salem
Winston-Salem
Winston-Salem
Winston-Salem
Winston-Salem
Winston-Salem
Winston-Salem
Winston-Salem
Winston-Salem
Winston-Salem
Winston-Salem
Winston-Salem
Winston-Salem
Winston-Salem
Winston-Salem
NOV-2004-PC-0081
NOV-2005-LV-0166
NOV-2005-LV-0559
LM-2001-0011
LV-2002-0568
LV-2004-0416
NOV-2003-LV-0310
NOV-2004-PC-0080
NOV-2005-LV-0168
NOV-2005-PC-0012
NOV-2006-PC-0044
LV-2001-0028
LV-2001-0332
LV-2004-0192
NOV-2004-LV-0367
NOV-2005-PC-0014
NOV-2006-PC-0041
LM-2003-0301
LV-2001-0388
LV-2002-0542
LV-2002-0569
LV-2003-0786
LV-2005-0231
LV-2005-0354
LV-2006-0016
Winston-Salem NOV-2004-LV-0019
Winston-Salem NOV-2004-PC-0082
Winston-Salem NOV-2005-LV-0556
Winston-Salem LV-2002-0266
Winston-Salem LV-2002-0319
Winston-Salem LV-2002-0620
Winston-Salem LV-2003-0445
Winston-Salem LV-2003-0623
Winston-Salem LV-2003-0764
Winston-Salem LV-2004-0075
Winston-Salem LV-2004-0299
Winston-Salem LV-2004-0596
Winston-Salem NOV-2004-LV-0451
Winston-Salem NOV-2004-LV-0501
Winston-Salem NOV-2005-LV-0118
Winston-Salem NOV-2005-LV-0176
FEC COLI
FEC COLI
FEC COLI
CHLORINE
FEC COLI
RES/TSS
RES/TSS
FEC COLI
NH3-N
FEC COLI
FEC COLI
NH3-N
NH3-N
FEC COLI
NH3-N
NH3-N
DO,fec,NH3
NH3-N
NH3-N
NH3-N
DO,fec,nh3
NH3-N
BOD,nh3,tss
FLOW
FLOW
BOD,Iss
BOD,tss
BOD
BOD,fec,tss
BOD
BOD
BOD
BOD
$0.00
$0.00
$0.00
$0.00
$0.00
$0.00
$0.00
$1,355.50
$0.00
$0.00
$0.00
$0.00
$526.00
$1,105.50
$338.00
$0.00
$0.00
$0.00
$0.00
$0.00
$1,076.00
$1,076.00
$338.00
$0.00
$0.00
$0.00
$340.00
$1,076.00
$1,105.50
$1.105.50
$0.00
$338.00
$338.00
$338.00
$0.00
$0.00
$0.00
$1,350.00
$2,599.00
$2,599.00
$1,086.00
$1,086.00
$336.00
$347.00
$1,197.00
$447.00
$0.00
$0.00
$0.00
$0.00
$0.00
$0.00
$0.00
$0.00
$0.00
$0.00
$0.00
$1,355.50
$0.00
$0.00
$0.00
$0.00
$326.00
$1,105.50
$338.00
$0.00
$0.00
$0.00
$0.00
$0.00
$1,076.00
$1,076.00
$338.00
$0.00
$0.00
$0.00
$340.00
$325.71
$355.21
$1,105.50
No special actions required
No special actions required
No special actions required
No special actions required
$338.00
$338.00 No special actions required
$338.00
$0.00
$0.00
$0.00
$1,350.00
$2,599.00
$2,599.00
$1,086.00
$1,086.00
$336.00
$347.00 No longer discharging, tied into Mayodan
$1,197.00
$447.00
$0.00
$0.00
$0.00
$0.00
NC0021873 Town of Mayodan
NC0021873 Town of Mayodan
NC0021873 Town of Mayodan
NC0021873 Town of Mayodan
NC0021873 Town of Mayodan
NC0021873 Town of Mayodan
NC0021873 Town of Mayodan
Mayodan WWTP
Mayodan WWTP
Mayodan WWTP
Mayodan WWTP
Mayodan WWTP
Mayodan WWTP
Mayodan WWTP
Winston-Salem LV-2002-0552
Winston-Salem LV-2003-0021
Winston-Salem LV-2003-0051
Winston-Salem LV-2004-0004
Winston-Salem LV-2004-0067
Winston-Salem LV-2004-0594
Winston-Salem LV-2005-0025
Page 2
FEC COLI
FEC COLI
FEC COLI
FEC COLI
$349.00 $349.00
$349.00 $349.00
$349.00 $349.00
$3,097.00 $3,097.00
$1,097.00 )1,097.00
$597.00 $597.00 No special actions required
$597.00 $597.00