NCS000567_COMPLIANCE_20151116

STORM UVATER-DIVI5ION CODING -SHEET
PERMIT NO.
N (-S O4g0 S C��l
DOC TYPE
0 FINAL PERMIT
❑ MONITORING INFO
❑ APPLICATION
-COMPLIANCE
❑ OTHER
DOC DATE
❑ �Dl S I I 16
YYYYMMDD

Environmental
Quality
November 16, 2015
Mr. Dudley Ray
Manager Environmental Compliance and Safety
ECOFLO Holding, Inc.
2750 Patterson Street
Greensboro, North Carolina 27407
Subject: NPDES Stormwater Permit, NCS000567
ECOFLO Holding, Inc.
Guilford County
Dear Mr. Ray:
PAT MCCRORY
Governor
DONA1_D R. VAN DER VAART
Secretary
In response to your renewal application for continued coverage under NPDES stormwater permit
NCS000567, the Division of Energy, Mineral and Land Resources is forwarding herewith the subject
state - 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 U.S.
Environmental Protection Agency dated October 15, 2007 (or as subsequently amended).
This final permit includes no major changes from the draft permit sent to you on December 12, 2014.
The monitoring strategy remains the same (semi-annual). Please note that analytical and qualitative
monitoring is required in this permit. Failure to complete the monitoring as required is a violation of
the permit and any permit noncompliance constitutes a violation of the Clean Water Act. Reference
Part III, Section A, Item 2 "Duty to Comply", Item 9 "Penalties for Tampering" and Item 10
"Penalties for Falsification of Reports" of your permit for further information.
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 III, B.2. addresses the requirements to be
followed in case of change in ownership or control of this discharge. This permit does not affect the
legal requirements to obtain other permits which may be required by the Division of Energy, Mineral,
and Land Resources, or permits required by the Division of Water Resources, Coastal Area
Management Act or any other federal or local governmental permit that may be required.
Nothing Compares-'-k­�_
State of North Carolina I Environmental Quatity
1601 Mail Service Center I Raleigh, North Carolina 27699-1601
919-707-8600

If you have any questions or comments concerning this permit, contact Mike Randall at (919) 807-
6374 or at mike.randall(a—)ncdenr.aov.
Sincerely,
r
for Tracy E. Davis, P.E., CPM, Director
Division of Energy, Mineral and Land Resources
cc: Winston-Salem Regional Office
DEMLR Stormwater Permitting Program Files
Attachments: NPDES Stormwater Permit, NCS000567

Environmental
Quality
November 16, 2015
Mr. Dudley Ray
Manager Environmental Compliance and Safety
ECOFLO Holding, Inc.
2750 Patterson Street
Greensboro, North Carolina 27407
Subject: NPDES Stormwater Permit, NCS000567
ECOFLO Holding, Inc.
Guilford County
Dear Mr. Ray:
PAT MCCRORY
Governor
DONALD R. VAN DER VAART
Secrrror-y
In response to your renewal application for continued coverage under NPDES stormwater permit
NCS000567, the Division of Energy, Mineral and Land Resources is forwarding herewith the subject
state - NPDES permit. This permit is issued pursuant to the requirements of North Carolina General
Statute 143-215 .l and the Memorandum of Agreement between North Carolina and the U.S.
Environmental Protection Agency dated October 15, 2007 (or as subsequently amended).
This final permit includes no major changes from the draft permit sent to you on December 12, 2014.
The monitoring strategy remains the same (semi-annual). Please note that analytical and qualitative
monitoring is required in this permit. Failure to complete the monitoring as required is a violation of
the permit and any permit noncompliance constitutes a violation of the Clean Water Act. Reference
Part III, Section A, Item 2 "Duty to Comply", Item 9 "Penalties for Tampering" and Item 10
"Penalties for Falsification of Reports" of your permit for further information.
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 15013 of the North Carolina General Statutes, and filed with the Office of
Administrative Hearings, Post Office Drawer 27447, Raleigh, North Carolina 2761 1-7447. Unless
such demand is made, this decision shall be final and binding.
Please take notice this permit is not transferable. Part III, 5.2. addresses the requirements to be
followed in case of change in ownership or control of this discharge. This permit does not affect the
legal requirements to obtain other permits which may be required by the Division of Energy, Mineral,
and Land Resources, or permits required by the Division of Water Resources, Coastal Area
Management Act or any other federal or local governmental permit that may be required.
Nothing Compares.`
State of North Carolina I Environmental Quality
1601 Mail Service Center I Raleigh, North Carolina27699-1601
919-707.8600

If you have any questions or comments concerning this permit, contact Mike Randall at (919) 807-
6374 or at mike. randall@,ncdenr.,qov.
Sincerely,
Original Signed by Micheal F. Randall
for Tracy E. Davis, P.E., CPM, Director
Division of Energy, Mineral and Land Resources
cc: Winston-Salem Regional Office
DEMLR Stormwater Permitting Program Files
Attachments: NPDES Stormwater Permit, NCS000567

Permit No. NC5000567
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF ENERGY, MINERAL, AND LAND RESOURCES
PERMIT
TO DISCHARGE STORMWATER 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,
ECOFLO Holding Inc.,
is hereby authorized to discharge stormwater from a facility located.at
2750 Patterson Street, Greensboro, NC
in Guilford County
to receiving waters designated as South Buffalo Creek, a class WS-V; NSW stream in the
Cape Fear River Basin, in accordance with the discharge limitations, monitoring
requirements, and other conditions set forth in Parts 1, II, III, and IV hereof.
This permit shall become effective January 1, 2016.
This permit and the authorization to discharge shall expire at midnight on December 31,
2021.
Signed this day November 16, 2015.
Original Signed by Micheal F. Randall
for Tracy E. Davis, P.E., CPM, Director
Division of Energy, Mineral and Land Resources
By the Authority of the Environmental Management Commission

NCDENR
North Carolina Department of Environment and Natural Resources
Pat McCrory John E. Skvarla, III
Governor Secretary
December 2, 2014
Mr. Dudley Ray
Manager Environmental Compliance and Safety
ECOFLO Holding, Inc.
2750 Patterson Street
Greensboro, North Carolina 27407
Subject: Draft NI'DES Stormwater Permit
ECOFLO Holding, Inc.
Guilford County
Dear Mr. Ray:
The Division of Energy, Mineral, and Land Resources' Stormwater Permitting Program
acknowledges receipt of your application for coverage under a NPDES Permit on March 8, 2013. We
are currently beginning our review of your application.
We look forward to our site visit, December 10, 2014 at 10:00 am. Please notify us if any
significant changes have taken place at this facility since you submitted the renewal package. If you
have any questions about this matter, please contact me at [phone] or [e-mail].
Sincerely
Mike Randall
Storrwater Permitting Program
cc: Winston-Salem Regional Office
DEM.LR Stormwater Permitting Program Files
Division of Energy, Mineral, and Land Resources
Energy Section • Geological Survey Section • Land Quality Section
1612 Mail Service Center, Raleigh, North Carolina 27699-1612 - 919-707-92001 FAX: [phone]
512 North Salisbury Street, Raleigh, North Carolina 27604 • Internet: http:llportal.ncdenr.org/webllr/
An Equal Opportunity k Affirmative Action Employer - 50% Recycled 110% Post Consumer Paper

AWWA
AM
NCDENR
North Carolina Department of Environment and Natural Resources
Pat McCrory John E. Skvarla, III
Governor Secretary
[date]
Mr. Dudley Ray
Manager Environmental Compliance and Safety
or
Mr. Paul McAllister, President/CEO
ECOPLO Holding, Inc.
2750 Patterson Street
Greensboro, North Carolina 27407
Subject: Draft NPDES Stormwater Permit
ECOFLO Holding, Inc.
Guilford County
Dear Mr. Ray [McAllister]:
Enclosed with this letter is a copy of the draft stormwater permit for your facility. Please review the
draft very carefully to ensure a thorough understanding of the conditions and requirements it contains.
Please submit any comments to me no later than thirty (30) days following your receipt of the draft.
Comments should be sent to the address listed on the front page of this letter. If no adverse comments
are received from the public or from you, this permit will likely be issued in about two months.
If you have any questions or comments concerning this draft permit, contact me at [phone] or
[e-mail]
Sincerely,
Mike Randall
Stormwater Permitting Unit
cc: Winston-Salem Regional Office, DEM1.R LQS
Stormwater Permitting Program
Attachments: Draft Permit
Division of Energy, Mineral, and Land Resources
Energy Section • Geological Survey Section • Land Quality Section
1612 Mail Service Center, Raleigh, North Carolina 27699-1612.919-707-92001 FAX: [phone]
512 North Salisbury Street, Raleigh, North Carolina 27604 • Internet: http://Portal.ncdenr.org/web/Irl
An Equal Opportunity l Affirmative Action Employer — 50% Recycled l 10% Post Consumer Paper

NCDENR
North Carolina Department of Environment and Natural Resources
Pat McCrory John E. Skvarla, III
Governor Secretary
[date]
Mr. Dudley Ray
Manager Environmental Compliance and Safety
or
Mr. Paul McAllister, President/CEO
ECOFLO Holding, Inc.
2750 Patterson Street
Greensboro, North Carolina 27407
Subject: Final NPDES Stormwater Permit
Permit No. NCS000567
ECOFLO Holding, Inc.
Guilford County
Dear Mr. Ray [McAllister]:
In response to your application for coverage under a NPDES Industrial Activity Stormwater Permit the
Division of Energy, Mineral, and I..and Resources is forwarding herewith the subject state - NPDES
permit, NCS000567. This permit is issued pursuant to the requirements of North Carolina General
Statute 143-215 .1 and the Memorandum of Agreement between North Carolina and the U.S.
Environmental Protection Agency dated October 15, 2007 (or as subsequently amended)..
This final permit includes no major changes from the draft permit sent to you on Idatel.
Please note that analytical and qualitative monitoring is required in this permit. Failure to complete the
monitoring as required is a violation of the permit and any permit noncompliance constitutes a violation
of the Clean Water Act. Reference Part 111, Section A, Item 2 "Duty to Comply", Item 9 "Penalties for
Tampering" and Item 10 "Penalties for Falsification of Reports" of your permit for further information.
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 2761 1-7447. Unless such demand is
made, this decision shall be final and binding.
Please take notice this permit is not transferable. Part III, B.2. addresses the requirements to be followed
in case of change in ownership or control of this discharge. This permit does not affect the legal
requirements to obtain other permits which may be required by the Division of Energy, Mineral, and
Division of Energy, Mineral, and Land Resources
Energy Section • Geological Survey Section • Land Quality Section
1612 Mail Service Center, Raleigh, North Carolina 27699-1612.919-707-9200 / FAX: [phone]
512 North Salisbury Street, Raleigh, North Carolina 27604 • Internet: http://Portal,ncdenr.org/web/Irl
An Equal Opportunity 1 Affirmative Action Employer - 50% Recycled 110% Post Consumer Paper

Mr. Ray
January 12, 2014
Page 2 of 2
Land Resources, or permits required by any other federal or local governmental permit that may be
required.
If you have any questions or comments concerning this permit, contact Mike Randall at [phone]
or at [e-mail].
Sincerely,
for Tracy E. Davis, P.E., CPM, Director
Division of Encrgy, Mineral and Land Resources
cc: Winston-Salem Regional Office
DEMLR Stormwater Permitting Program Files
Attachments: Final Permit

Individual Permit Renewal File Checklist:
When the renewal permit is issued, make sure the Stormwater Permitting Program
permit file contains the following items:
Stormwater Permitting Program Permit file:
1. Previous permits (NA, new application)
2. Original applications (new application)
3. Renewal correspondence
4. Staff Report & supporting documentation
S. Draft permit cover letter (letter only)
6. Copy of public notice affidavit (must have before issuance)
7. Any public comment correspondence
8. Cover letter and final permit (copy)
9. Tracking slip (copy)
The following items should be clipped together and sent to Central Files. It is
important the original application is included because it will he sent to State
Archives in accordance with the agency's retention schedule:
Central Files:
1. Original application
2. Draft permit (detach from cover letter, which stays in Permit file)
3. Copy of public notice language (e.g., fax to newspaper)
4. Any duplicates of public comment letters and/or other correspondence
S. Cover letter and final permit (signed original)
6. Tracking slip (on top, with Permit Number highlighted)
Regional Office Files:
1. Cover letter and final permit

NCDENR
North Carolina Department of Environment and Natural Resources
Division of Energy, Mineral, and Land Resources
Land Quality Section
Tracy E. Davis, PE, CPM Pat McCrory, Governor
Director .John E. Skvarla, III, Secretary
DATE: December 2, 2014
TO: [RECIPIENT]
EMAIL: [E-MAIL]
FROM: Mike Randall, DIVISION OF ENERGY, MINERAL, AND LAND RESOURCES
SUBJECT: PUBLIC NOTICE
PAGES: 1 or 1
Please publish only the information (Public Notice) attached, ONE TIME in the legal section of your paper by [date]. Please fax a
copy of the proof to me at f phone number] for final approval prior to publication. Within 10 days after publish date, please
send the invoice and two copies of the original affidavit to:
Need Contact Name Here
NCDENR/DEMLR Stormwater Permitting Program
1612 Mail Service Center
Raleigh, NC 27699-1617
NC DIV. OF ENERGY, MINERAL, AND LAND RESOURCES' INTENT TO ISSUE A STORMWATER DISCHARGE PERMIT
Public comment or objection to the draft permits is invited. Submit written comments to DWQ at the address
below. All comments received prior to [date] will be considered in the final determination regarding permits
issuance and permit provisions.
Application: ECOFLO Holding, Inc. has applied for an NPDES permit to discharge stormwater from an industrial
facility at: ECOFLO Holding, Inc. 2750 Patterson Street, Greensboro, North Carolina 27407 in Guilford County. The
facility discharges to South Buffalo Creek, a class WS-V; NSW stream in the Cape Fear River Basin.
A copy of the draft permit, NCS000567, is available at: httt)://portal.ncdenr.orp/web/Ir/public-notices. Additional
permit documents are available for the reproduction cost at:
DEMLR Stormwater Permitting Program
512 N. Salisbury�Street (location, zip 27604)
1612 Mail Service Center (mail)
Raleigh, NC 27699-1617
Stormwater Permitting Contact: Mike Randall
[phone]
mike.randall@ncdenr,gov
1612 Mail Service Center, Raleigh, North Carolina 27699-1612 • Telephone [phone] FAX: [phone]
512 North Salisbury Street, Raleigh, North Carolina 27604 • Internet: http://portal.nodenr.org/webfrAand-quality
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NC DEMLR Stormwater Permitting Program
Stormwater Benchmarks and Sources
October 25, 2013
Most values listed in this table represent freshwater values. Permit writers should investigate whether criteria for saltwater and
human health (water supply waters) are applicable and would serve as a more appropriate basis for a permit benchmark. Also
note that some facilities may have different benchmarks to address unique circumstances.
Parameter
Benchmark Conc.
Units
Source
Acetone
17
mg/I
Y2 FAV (N. Remington; 9/2008).
crylamide
28
mg/I
Y� FAV (N. Remington, 10/2009).
crylonitrile
3.8
mg/1
Y2 Lowest Observed Effect Level (LOEL); EPA's 1986 Water Quality
Criteria for acrylonitrile
Aluminum, total recoverable
0.75
mg/I
: FAV (Final Acute Value); EPA's National Recommended Water
Quality Criteria (Acute) for aluminum. Not hardness dependent.
Aluminum Sulfate
1.1
mg/I
2 FAV derived from EPA's ECOTOX Database (Feb 2005, J. Wynn).
Ammonium Sulfate
19
mg/l
: FAV derived from EPA's ECOTOX Database (Feb 2005, J. Wynn).
Ammonia, total as Nitrogen
7.2
mg/I
12 FAV @pH 8; EPA's 1999 Update of Ambient Water Quality Criteria
or ammonia
Ammonia, total as Nitrogen
5.6
mg/I
Y. FAV @ pH 8; EPA's 1999 Update of Ambient Water Quality Criteria
(Trout)
for ammonia. More.stringent to protect trout species.
nthracene
0.005
mg/I
Y2 FAV derived from EPA's ECOTOX Database (Feb 2005, J. Wynn).
Antimony, total recoverable
0.09
mg/I
Y. FAV; EPA's National Recommended Water Quality Criteria (Acute)
Or antimony (III).
Arsenic, total recoverable
0.34
mg/I
2 FAV; EPA's National Recommended Water Quality Criteria (Acute)
or dissolved arsenic (not hardness dependent), converted to total
ith EPA partition translator = 1.0 (revised 2013). Note human
ealth standard is 10 ug/t, but normally would not use that for a
tormwater benchmark.
Bacteria, enterococcus
500
Entero-
Enterococcus includes: Enterococcus faecolis, Enterococcus
coccus/100
faecium, Enterococcus avium, and Enterococcus gallinarium
ml
Require for saltwaters if necessary. See Rationale Document.
This value is based on EPA's 1986 Ambient Water Quality Criteria
for Bacteria. (July 2007, K. Johnson and C. Brower)
Based on single sample maximum value.
Bacteria, fecal coliform
1000
col/100 ml
Require for freshwaters if necessary. See Rationale Document.
(June 2007, K. Johnson and C. Brower)
Based on geometric mean of 10+ samples/year. See Rationale
Document.
Benzene
6.7
mg/I
Y2 FAV derived from EPA's ECOTOX Database (Feb 2005, J. Wynn).
Benzo(a)pyrene (PAH),
2.5
ug/I
K FAV (N. Remington, 9/2010)
CAS # 50-32-8
0.0025
mg/I
Beryllium
0.065
mg/I
% FAV; EPA's National Recommended Water Quality Criteria (Acute)
or dissolved beryllium (not hardness dependent), converted to total
ith EPA partition translator = 1.0 (revised 2013)
BOD$ (Biological Oxygen Demand,
30
mg/I
BPJ, Based on Secondary Treatment Regulation (40 CFR 133.03).
day)
Cadmium
0.003
mg/I
2 FAV; EPA's National Recommended Water Quality Criteria (Acute)
or dissolved cadmium, calculated with assumed 25 mg/I hardness,
nd then converted to total with EPA partition translator based on
ssumed 10 mg/I TSS (revised 2013)
admium (Trout)
0.002
mg/I
FAV; EPA's National Recommended Water Quality Criteria (Acute)
�or dissolved cadmium, calculated with assumed 25 mg/I hardness,
NC Stormwater Permitting Program Benchmarks
Last revised October 25, 2013
Page 1

Parameter
Benchmark Conc.
Units -
ource-
nd then converted to total with EPA partition translator based on
ssumed 10 mg/I TSS. More stringent to protect trout species
revised 2013).
Chloride
860
mg/I
PA's National Recommended Water Quality Criteria, 2006 (Note:
here was previously a water supply chloride value. K. Johnson
emoved it on 12 June 2007 after discussion with C. Brower and J.
ent.)
hlorine, Total Residual (TRC)
28
ug/l
2 FAV (NC's calculation, not EPA's); See 'Total Residual Chlorine: An
0.028
mg/I
Dverview of North Carolina's Standard Development' (value from
arns et al., 1978).
Chromium (total)
N/A
mg/I
1EMOVED. Assume all chromium III in most cases; chromium VI only
f suspected source (revised 2013).
Chromium III, total recoverable
0.905
mg/L
6 FAV; EPA's National Recommended Water Quality Criteria (Acute)
'or dissolved chromium lll, calculated with assumed 25 mg/I
ardness, and then converted to total with EPA partition translator
ased on assumed 10 mg/I TSS (revised 2013).
Chromium Vi, total recoverable
0.016
mg/1
: FAV; EPA's National Recommended Water Quality Criteria (Acute)
or dissolved chromium VI (not hardness dependent), converted to
otal with EPA partition translator = 1.0 (revised 2013).
Cobalt
N/A
mg/I
qo longer use %2 FAV from 200S that was based on limited data.. '
here is human health information. Consult DWR Planning Section.
COD (Chemical Oxygen Demand)
120
mg/I
BPJ, Generally found at levels 4 x (BODg) in -domestic wastewaters.
Copper, total recoverable
0.010
mg/I
Y2 FAV; EPA's National Recommended Water Quality Criteria (Acute)
or dissolved copper, calculated with assumed 25 mg/I hardness, and
hen converted to total with EPA partition translator based on
assumed 10 mg/I TSS (revised 2013).
Creosote
0.3
mg/I
2 EPA's FAV, EPA's ECOTOX Database (Feb 2005, J. Wynn).
Cresol
4.0
mg/I
Y2 FAV, based on p-Cresol (4-methyl phenol) form. Derived from
EPA's ECOTOX Database (July 2003, J. Wynn).
Cyanide
0.02
mg/I
Y2 FAV, EPA's 1984 Ambient Water Quality Criteria for Cyanide
expressed as free CN)
2,4-Dimethylphenol
1
mg/I
Y, LOEL, EPA's 1980 Ambient Water. Quality Criteria for 2,4-
imethylphenol
1,4-Dioxane
0.73
mg/IIn-stream
standards for general human health exposures, Class C
waters. May not be best benchmark for all permits; consult DWR
tanning Section.
Dioxin
Any Detection
-
onnie Brower, May 2007_ Dioxins are bioaccumulants. Any
etection is recognition of a problem.
Enterococcus
-
-
iee "Bacteria"
Ethanol
3,900
mg/L
2 FAV (Verschueren, Karel. Handbook of Environmental Data on
rganic Chemicals. 3rd Ed. 1996.) (March 2007, J. Dent)
Ethylene Glycol
8,000
mg/I
Y2 FAV derived from EPA's ECOTOX Database (N. Remington, 9/2010).
Correction to previous benchmark.
Fecal Coliform (See "Bacteria")
-
Fluoranthene (PAH),
0.6
ug/I
Y2 FAV (N. Remington, DWQ, 9/2010)
CAS #206-44-0
0.0006
mg/I
Fluorene (PAH),
0.3
mg/I
Y2 FAV (N. Remington, DWQ, 9/2010)
CAS # 86-73-7
NC Stormwater Permitting Program Benchmarks
Dist revised October 25, 201:3
Page 2

Parameter
Benchmark Conc.
units
�ource
Fluoride
6
mg/I
2 FAV derived from EPA's ECOTOX Database (Aug. 2006)
Formaldehyde
0.5 •
mg/I
2 FAV derived from EPA's ECOTOX Database (Sept 2005, J. Wynn).
Hexamine
25,000
mg/I
: FAV derived from PAN Pesticides Database (Dec 2005, J. Wynn). .
ased on limited data; consult DWR Planning Section.
Iron
N/A
mg/1
REMOVED. Ubiquitous in NC soils and current NC Water Quality
standard proposed to be removed (revised 2013).
Isopropyl Alcohol
4,300
mg/L
X FAV (ECOTOX 3/07) (March 2007, J. Dent)
Lead, total recoverable
0.075
mg/l
4 FAV; EPA's National Recommended Water Quality Criteria (Acute)
or dissolved lead, calculated with assumed 25 mg/1 hardness, and
hen converted to total with EPA partition translator based on
ssumed 10 mg/1 TSS (revised 2013).
Magnesium
32
mg/I
2 FAV derived from EPA's ECOTOX Database (Feb 2005,1. Wynn).
Manganese
N/A
mg/I
14o benchmark. See Rationale Document.
MBAS (Methylene Blue Active
0.5
mg/I
C Water Quality Standard 15A NCAC 02B ,0121 for Water Supply
Substances)
3ystems (WS-1) (aesthetic standard to prevent foaming)
Mercury
0.000012
mg/I
C Water Quality Standard 15A NCAC 026, bioaccumulative
(12 ng/L)
ieurotoxin. Not always appropriate for stormwater benchmark if
et deposition influences.
Methanol
7,700
mg/L
2 FAV (ECOTOX 3/07) (March 2007, J. Dent)
Methylene Chloride
110
mg/I
2 FAV (N. Remington, 2/2009). Extremely common lab
contaminant; cross-check blanks on lab sheet data if there are hits.
Methyl Ethyl Ketone (MEK)
1,600
mg/L
Y, FAV ( ECOTOX 1/07) (March 2007, J. Dent)
Methyl Methacryiate
96
mg/I
X. FAV (N. Remington, 2/2009).
Molybdenum
510
mg/I
Ya FAV derived from EPA's ECOTOX Database (Feb 2005, J. Wynn)
Naphthalene
1
mg/I
Y2 Lowest Observed Effect Level (LOEL); EPA's 1980 Water Quality
Criteria for naphthalene
Nickel, total recoverable
0.335
mg/I
2 FAV; EPA's National Recommended Water Quality Criteria (Acute)
or dissolved nickel, calculated with assumed 25 mg/I hardness, and
hen converted to total with EPA partition translator based on
ssumed 10 mg/I TSS (revised 2013).
Nitrate + Nitrite (NO3+NO2)
10
mg/I
National Primary Drinking Water Regulation in 40 CFR 141.11 and
15A NCAC 2B for nitrate (Expressed in mg/I of N).
Nitrogen, Total Kjeldahl (TKN)
20
mg/L
BPJ, based on approximate equivalency to secondary treatment of
wastewater (expressed in mg/I of N).
Nitrogen, Total
30
mg/I
TKN + Nitrate + Nitrite Benchmarks (Expressed in mg/I of N).
an -polar Oil and Grease, Method
15
mg/I
Fargets petroleum -based hydrocarbons with silica gel treatment step
1664 SGT-HEM (Estimate of Total
3nd hexane extraction. Value based on review of other states'
Petroleum Hydrocarbons, or TPH)
aximum daily benchmark concentrations. Equal to one half x [O&G
enchmark]. See Rational Document.
Oil and Grease
30
mg/I
BPJ, Based on wastewater permit limits. Consider "Non -polar O&G"
nstead if targeting petroleum hydrocarbons (e.g., vehicle maint.)
Polychlorinated Biphenyls (PCBs)
"There shall be no
ug/L
he aquatic life standard is 0.001 ug/L. The detection limits for
�rochlors
discharge of
1016, 1221, 1232, 1242, 1248, 1254, 1260, and 1262 are 1
polychlorinatedug/L.
Because we cannot quantify PCBs below the detection limit,
biphenyl
any detection is considered an exceedance of the benchmark. (C.
compounds."
Brower on 8/2010.)
NC StormwaterFermitting Program Benchmarks
Last remised October 25, 2013
I Page 3

�xa6 ' ,�
_
xarameter
Benchmark Canc.
Units a
_ounce
Pentachlorophenol
0.019
mg/I
2 FAV @ pH 7.8, CIVIC from EPA's 1995 Update to Ambient Water
uafity Criteria for Pentachlorophenol
pH (min, max)
6-9
S.U.
Nater Quality Standard (Note Swamp waters can be as low as 4.3,
ut still expect stormwater discharges to fall in neutral range, unless
cid rain influence.) Measured in standard units.
Phenol(Trout)
4.5
mg/I
Y2 FAV derived from EPA's ECOTOX Database (Feb 2005, J. Wynn).
Note-- 0.3 mg/L may exhibit an organoleptic effect. (Note: There
as previously a non -trout phenol value. K. Johnson removed it on 8
June 2007 after discussion with C. Brower and J. Dent. It had been
et.from only one data point.)
Phosphorous, Total
2
mg/l::--:.
BPJ;-based on wastewater permit limits for NSW waters.
Selenium
0,056
mg/I
Yz FAV based on Selenite and 1986 Study an Sejmpacts in NC..,[July
986;. Report No. 86-02: NC Water Quality Standard Documentation:
�he Freshwater Chemistryand Tozicity`of Selenium With Emphasis
'nOt&. ffects in North Carolina: (O;rrly in.print)] .w
Silver, total recoverable
0.0003
mg/I
z FAV; EPA's National-Recommerded Water Quality Criteria (Acute)
or dissolved silver, calculated with assumed 25 mg/I hardness, and
hen converted to total with EPA partition translator based on
assumed 10 mg/I TSS (revised 0013, typo corrected 11/18/?D13).
Sodium
865
mg/I
:'FAV derived from EPA's.ECOTOX Database (Feb 2005, J: Wynn).
-
lBased on limited data; consult DWR'Planning Section.
Sodium Sulfate
_
125
mg/I
: FAV derived from EPA's ECOTOX Database (Feb 2005, J. Wynn).
ased on limited data; consult DWR Planning Section.
Styrene
1.5
mg/I
N. Remington, 2/2009 .
Sulfate
500
/I
2 FAV derived from EPA's ECOTOX Database (Feb 2005, J. Wynn).
ased on limited data; consult DWR Planning Section. (Note: There
[=�P/z.FAV
as previously a water supply value; removed in June 2007 after
iscussion with C. Brower and J. Dent.)
-butyl Alcohol
3,200
(ECOTOX 3/07)-(J: Dent March 2007)
hiram
0.2
ug/I
z FAV (N. Remington,-7/2009)
0.002
mg/I
Toluene (Non -Trout)
0,055
mg/I
From NC 2B Std. (11 ug/1), based' on April 1986 DWQ internal Report:
N.0 Dept. N.R.C.D., Division of -Environmental Management. No-
tchronic levels or aquatic toxicit : Or anic compounds oun d
Ashland Chemical Site in Ralei h NC.
Toluene (Trout)
0.0018
mg/I
From NC 2B Trout Std. (0.36 ug/1), based on April 1986 DWQ Internal
eport: N.0 Dept. N.R.C.D., Division of Environmental Management.
o-e ect chronic levels for aquatic toxicity: Organic compounds
ound near Ashland Chemical Site in Ralei h NC.
Total Petroleum Hydrocarbons
15
mg/I
ased on review of other states' maximum daily benchmark
(TPH) (see also "Non -polar O&G")
oncentrations. See Rationale Document.
Turbidity
50
ntu
NC Aquatic Life Standard
Turbidity — Lakes and Saltwaters
25
ntu
NC Aquatic Life Standard, Lakes/Reservoirs, saltwaters
urbidity —Trout
10
ntu
NC Aquatic Life Standard, Trout (Tr) waters
SS (Total Suspended Solids)
100
mg/I
National Urban Runoff Program (NURP) study from 1983.
SS -- ORW, HQW (incl. Tr, PNA)
50
mg/I
Based on one-half the standard benchmark of 100 mg/I.
Uranium
Facility -Specific
mg/1
ee the Rational Document
Vinyl Acetate
9.0
mg/I
N. Remington, DWQ, 2/2009. Based on limited data; consult DWR
lanning Section.
NC Stormwater Permitting Program Benchmarks
Last revised Octohcr 25, 2013
Page 4

t'urce
ammeter
8enc4trk Conc.
Unit
ylenes, total
6.7
mg/1
z FAV derived from EPA's ECOTOX Database (Feb 2005, J. Wynn).
m-Xylene
8
mg/I
Y, FAV derived from EPA's ECOTOX Database (Feb 2005, J. Wynn).
o-Xylene
4.03
mg/I
: FAV derived from EPA's ECOTOX Database (Feb 2005, J. Wynn).
p-Xylene
4.2
mg/I
Yz FAV'derived from EPA's ECOTOX Database (Feb 2005, J. Wynn).
inc, total recoverable
0.126
mg/I
Y. FAV; EPA's National Recommended Water Quality Criteria (Acute)
for dissolved zinc, calculated with assumed 25 mg/I hardness, and
hen converted to total with EPA partition translator based on
ssumed 10 mg/I TSS (revised 2013).
NC Stormwater Permitting Program Benchmarks
Last revised October 25, 2013
Page 5