NCS000010_FINAL PERMIT_19940831

-- —STORMWATER-DIVISION-CODINGSHEET-
PERMIT NO.
/v (,S oco oio
DOC TYPE
k FINAL PERMIT
❑ MONITORING INFO
❑ APPLICATION
❑ COMPLIANCE
❑ OTHER
DOC DATE
❑ `1 0 it
YYYYM M DD

Permit No. NCS000010
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT, HEALTH, AND NATURAL RESOURCES
DIVISION OF ENVIRONMENTAL MANAGEMENT
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,
Stockhausen, Inc.
is hereby authorized to discharge stormwater from a facility located at
Doyle and Higgins Streets
Greensboro
Guilford County
to receiving waters designated as Mile Run Creek, a class C-NSW stream, in the Cape Fear River Basin
in accordance with the discharge limitations, monitoring requirements, and other conditions set forth in
Parts I, II, 11I, and IV hereof.
This permit shall become effective October 1, 1994.
This permit and the authorization to discharge shall expire at midnight on August 31, 1999.
Signed this day August 31 1994.
Original Siena-+ n„
Coleen
A. Preston Howard, Jr., P.E., Director
Division of Environmental Management
By the Authority of the Environmental Management Commission

Permit No. NCS000010
PERMITTED ACTIVITIES
Until this permit expires or is modified or revoked, the permittee is authorized to discharge
stormwater to the surface waters of North Carolina or separate storm sewer system which has been
adequately treated and managed in accordance with the terms and conditions of this Permit. All
discharges shall be in accordance with the attached schedules as follows:
Part I: Monitoring, Controls, and Limitations for Permitted Discharges
Part 11: Standard Conditions for NPDES Stormwater Permits
Part III: Limitations Reopener
Part IV: Administering and Compliance Monitoring Fee Requirements
Any other point source discharge to surface waters of the state is prohibited unless covered by
another permit, authorization or approval.
This permit does not relieve the permittee from responsibility for compliance with any other
applicable federal, state, or local law, rule, standard, ordinance, order, judgement, or decree.
Page 2

I

Permit No. NCS000010
PART I
MONITORING, CONTROLS, AND LIMITATIONS FOR PERMITTED
DISCHARGES
ECTION_A; FINAL LIMITATIONS AND CONTROLS FOR STORMWATER DISC1 ARGE
During the period beginning on the effective date of the permit and lasting until expiration, the
Permittee is authorized to discharge stormwater associated with industrial activity. Such
discharges shall be controlled, limited and monitored as specified below.
1. Stormwater Pollution Prevention Plan
The Permittee shall develop a Stormwater Pollution Prevention Plan, herein after referred to as the
Plan. This Plan shall be considered public information in accordance with Part II, Standard
Conditions, Section E.8. of this permit. The Plan shall include, at a minimum, the following
items:
a. Site Plan. The site plan shall provide a description of the physical facility and the potential
pollutant sources which may be expected to contribute to contamination of stormwater
discharges. The site plan shall contain the following:
(1) A general location map (USGS quadrangle map or appropriately drafted equivalent
map), showing the facility's location in relation to transportation routes and surface
waters, the name of the receiving water(s) to which the stormwater outfall(s)
discharges, or if the discharge is to a municipal separate storm sewer system, the
name of the municipality and the ultimate receiving waters; and accurate latitude
and longitude of the point(s) of discharge.
(2) A narrative description of storage practices, loading and unloading activities,
outdoor process areas, dust or particulate generating or control processes, and
waste disposal practices.
(3) A site map drawn to scale with the distance legend indicating location of industrial
activities (including storage of materials, disposal areas, process areas and loading
and unloading areas), drainage structures, drainage areas for each outfall and
activities occurring in die drainage area, building locations and impervious surfaces,
and the percentage of each drainage area that is impervious. For each outfall, a
narrative description of the potential pollutants which could be expected to be
present in the stormwater discharge.
(4) A list of significant spills or leaks of pollutants that have occurred at the facility
during the 3 previous years and any cotrective actions taken to mitigate spill
impacts.
(5) Certification that the stormwater outfalls have been evaluated for the presence of
non-Stormwater discharges. The certification statement will be signed in
accordance with the requirements found in Part LI, Standard Conditions, Section
B.9.
Page 4

Permit No. NCS000010
Stormwater Management Plan. The stormwater management plan shall contain a narrative
description of the materials management practices employed which control or minimize the
exposure of significant materials to stormwater, including structural and nonstructural
measures. The stormwater management plan, at a minimum, shall incorporate the
following:
(1) A study addressing the technical and economic feasibility of changing the methods
of operations and/or storage practices to eliminate or reduce exposure of materials
and processes to stormwater. Wherever practicable the permittee shall cover all
storage areas, material handling operations, manufacturing or fueling operations to
prevent materials exposure to stormwater. In areas where elimination of exposure
is not practicable, the stormwater management plan shall document the feasibility of
diverting the stormwater runoff away from areas of potential contamination.
(2) A schedule to provide secondary containment for bulk storage of liquid materials,
storage of Section 313 of Title III of the Superfund Amendments and
Reauthorization Act (SARA) water priority chemicals, or storage of hazardous
materials to prevent leaks and spills from contaminating stormwater runoff. If the
secondary containment devices are connected directly to stormwatcr conveyance
systems, the connection shall be controlled by manually activated valves or otlier
similar devices [which shall be secured with a locking mechanism] and any
stormwater that accumulates in the containment area shall be at a minimum visually
observed for color, foam, and visible sheens, prior to release of the accumulated
stormwater. Accumulated stormwater shall be released if found to be
uncontaminated. Records documenting the individual making the observation, the
description of the accumulated stormwater and the date and time of the release shall
be kept for a period of five years.
(3) A narrative description shall be provided of Best Management Practices (BMPs) to
be considered such as, but not limited to, oil and grease separation, debris control,
vegetative filter strips, infiltration and stormwater detention or retention, where
necessary. The need for structural BMPs shall be based on the assessment of
potential of sources to contribute significant quantities of pollutants to stormwater
discharges and data collected through monitoring of stormwater discharges.
(4) Inspection schedules of stormwater conveyances and controls and measures to be
taken to limit or prevent erosion associated with the stormwater systems.
Spill Prevention and Response Plan. The Spill Prevention and Response Plan shall
incorporate a risk assessment of potential pollutant sources based on a materials inventory
of the facility. Facility personnel (or team) responsible, for implementing the plan shall be
identified in the plan. A responsible person shall be on -site at all times during facility
operations that have the potential to contaminate stormwatcr runoff through spills or
exposure of materials associated with the facility operations.
d. Preventative Maintenance and Good Housekeeping Program. A preventative maintenance
program shall be developed. The program shall document schedules of inspections and
maintenance activities of stormwater control systems, plant equipment and systems.
Inspection of material handling areas and regular cleaning schedules of these areas shall be
incorporated into the program.
Employee Training. Training schedules shall be developed and training provided at a
minimum on an annual basis on proper spill response and cleanup procedures and
preventative maintenance activities for all personnel involved in any of the facility's
Page 5

Permit No. NCS000010
operations that have the potential to contaminate stormwater runoff. Facility personnel (or
team) responsible for implementing the training shall be identified in the Plan.
Responsible Party. The Stormwater Pollution Prevention Plan shall identify a specific
position(s) responsible for the overall coordination, development, implementation, and
revision to the Plan. Responsibilities for all components of the Plan shall be documented
and position(s) assignments provided.
Plan Ammendment. The permittee shall amend the Plan whenever there is a change in
design, construction, operation, or maintenance which has a significant effect on the
potential for the discharge of pollutants to surface waters. The Stormwater Pollution
Prevention Plan shall be reviewed and updated on an annual basis.
The Director may notify the permittee when the Plan does not meet one or more of the
minimum requirements of the permit. Within 30 days of such notice, the permittee shall
submit a time schedule to the Director for modifying the Plan to meet minimum
requirements. The permittee shall provide certification in writing (in accordance with Part
II, Standard Conditions, Section B, #9) to the Director that the changes have been made.
Facility Inspections. Inspections of the facility, and all storniWater systems shall occur at a
minimum on a semiannual schedule, once in the fall (September -November) and once
during the spring (April - June). The inspection and any subsequent maintenance activities
performed shall be documented, recording date and time of inspection, individual(s)
making the inspection and a narrative description of the facility's stormwater control
systems, plant equipment and systems. Records of these inspections shall be incorporated
into the Stormwater Pollution Prevention Plan.
Visual monitoring as required in I.A.2.g.(3) shall be performed in addition to facility
inspections.
Implementation. Implementation of the plan shall include documentation of all monitoring,
measurements, inspections and maintenance activities and training provided to employees,
including the log of the sampling data and of activities taken to implement BMPs associated
with the industrial activities, including vehicle maintenance activities. Such documentation
shall be kept on -site for a period of five years and made available to the Director or his
authorized representative immediately upon request.
Page 6

Permit No. NCS000010
2. Minimum Monitoring and Reporting Requirements
Minimum monitoring and reporting requirements are as follows unless otherwise approved in
writing by the Director of the Division of Environmental Management.
a. If a facility has multiple discharge locations with substantially identical stormwater
discharges that are required to be sampled, the permittee may petition the Director for
representative outfall status. If it is established that the stormwater discharges are
substantially identical and the permittee is granted representative outfall status, then
sampling requirements may be performed at a reduced number of outfalls.
Visual monitoring for color, odor, solids, foam. outfall staining, visible sheens and dry
weather flow shall be performed at all stormwater discharge outfall locations. All visual
monitoring shall be documented and records maintained with the Stormwater Pollution
Prevention Plan. The initial visual monitoring event shall be performed simultaneously
with the first analytical monitoring event and documentation of only this initial visual
monitoring event shall be submitted along with the required analytical monitoring submittal.
For purposes of the stormwater sampling required in this permit, all samples shall be
collected from a discharge resulting from a representative storm event (See Part 11,
Standard Conditions, Section A). Failure to monitor storm events in accordance with the
specified frequency shall constitute a violation of this permit. If the stormwater runoff is
controlled by a detention pond, the following sampling requirements shall apply:
(1) If the detention pond detains the runoff generated by one inch of rainfall for 24
hours, visual observations for color, foam, outfall staining, visible sheens, and dry
weather flow are required, but analytical sampling shall not be required.
(2) If the detention pond discharges only in response to a storm event exceeding a 25-
year, 24-hour storm (See Part II, Standard Conditions, Section A), the pond shall
be considered a non -discharging stormwater control system and not subject to
NPDES requirements, unless the discharge causes a violation of water quality
standards.
Samples analyzed in accordance with the terms of this permit shall be submitted on forms
provided by the Director no later than January 31 for the previous year in which sampling
was required to be performed.
Analytical results from sampling during the final year of the permit term shall be submitted
with the permit renewal application.
This permit regulates stormwater discharges. Non-stormwater discharges which shall be
allowed in the stormwater conveyance system are: y
(1) All other discharges that are authorized by a non-stormwater NPDES permit.
(2) Uncontaminated groundwater, foundation drains, air -conditioner condensate
without added chemicals, springs, discharges of uncontaminated potable water,
waterline and fire hydrant flushings, water from footing drains, flows from riparian
habitats and wetlands.
(3) Discharges resulting from fire -fighting.
Page 7

Permit No. NCS000010
If the storm event monitored and reported in accordance with this permit coincides with a
non-stormwater discharge, the permittee shall separately monitor and report all parameters
as required under the non-stormwater discharge permit and provide this information with
the stormwater discharge monitoring report.
Specific Stormwater Monitoring Requirements
The specific stormwater monitoring requirements includes both analytical and visual monitoring of
stormwater samples. Specific monitoring requirements are defined below.
(1) Analytical Monitoring
Stormwater Discharge
Characteristics
nit
Measurement
Fre uenc I
Sample
T e2
Sample
Location3
BOD5
m
annually
Grab
SDO
Total Suspended Solids
m
annually
Grab
SDO
Chemical Oxygen Demand
m
annually
Grab
SDO
Total Rainfal14
inches
Event Duration4
minutes
Total Flow4
MG
SDO
Footnotes:
I Measurement Frequency: Once per year with samples taken during the sampling
window of April through November. The facility must perform analytical sampling
during the first and last year of the permit term regardless of cut-off concentration
conditions.
2 Sample Type: Defined in Part II, Standard Conditions, Section A.
3 Sample Location: Samples to be taken at each stonnwater discharee
outfall (SDO) unless representative outfall status has been granted.
4 For each sampled representative storm event the total precipitation, storm duration,
and total flow must be monitored. Total flow shall be either; (a) measured
continuously, (b) calculated based on the amount of area draining to the outfall, the
amount of built -upon (impervious) area, and the total amountofrainfall, or (c)
estimated by the measurement of flow at 20 minute intervals during the rainfall
event.
(2) Cut-off Concentrations
The arithmetic mean of all analytical sampling results collected during the term of the permit
shall be calculated for each parameter and compared to the cut-off concentrations listed below.
If the arithmetic mean meets the specified cut-off concentration condition for a given parameter,
then the facility is not required to continue annual analytical monitoring for that parameter
during the term of the permit unless a significant change in facility operations or configuration
occurs. If a cut-off concentration results in discontinued analytical monitoring, the permittee is
Page 8

Permit No. NCS000010
required to maintain facility operations that ensure the continuation of stormwater runoff
quality.
The permittee must perform analytical sampling during the first and last year of the permit term
regardless of cut-off concentration conditions. Analytical results from sampling during the
final year of the permit term must be submitted with the permit renewal application.
Stormwater Discharge
CharactrristiQ
Cut-off Concentration
BOD5
<30 m /l
Total Suspended Solids
<100 mg/l
Chemical Oxygen Demand
< 120 mg/1
(3) Visual Monitoring
Visual monitoring requires a qualitative visual inspection of each stormwater outfall, regardless
of representative outfall status, for the purpose of evaluating the effectiveness of the
Stormwater Pollution Prevention Plan (SPPP) and assessing new sources of stormwater
pollution. No analytical tests are required. Visual monitoring of stormwater outfalls does not
need to be performed during a representative storm event.
Stormwater Discharge
Characteristics
Fre n 1
Monitoring
T 2
Monitoring
Location3
Color
Semi -Annual
Visual
SDO
Odor
Semi -Annual
Visual
SDO
Clarity
Semi -Annual
Visual
SDO
Floating Solids
Semi -Annual
Visual
SDO
Suspended Solids
Semi -Annual
Visual
SDO
Foam
Semi -Annual
Visual
SDO
Oil Sheen
Semi -Annual
Visual
SDO
Other obvious indicators
of stormwater pollution
Semi -Annual
Visual
SDO
Footnotes:
1 Frequency: The first visual monitoring event during the term of the permit must be
performed during the initial analytical monitoring event. All subsequent visual
monitoring will be performed twice per year, once in the spring and once in the fall.
Monitoring Type: Visual monitoring requires a qualitative visual observation of each
stormwater outfall. No analytical testing or sampling is required.
3 Sample Location: Stormwater Discharge Outfall (SDO)
Page 9

Permit No. NCS000010
(4) Analytical Monitoring Requirements for Vehicle Maintenance Activities]
Stormwater Discharge
Characteristics
nit
Measurement
Fre u n 2
Sample
Type
Sample
Location3
H
standard
annually
Grab
SDO
Oil and Grease
m
annually
Grab
SDO
New Motor Oil Usagegallons/month
annually
Estimate
SDO
Total Fl0w4
MG
annually
Grab
SDO
Lead, Total Recoverable5
u
annually
Grab
SDO
Total Suspended Solids
m
annually
Grab
SDO
Detergents (MBAS)6
m
annually
Grab
SDO
Footnotes:
1 Stormwater discharges from any vehicle maintenance activity occurring on -site
which uses more than 55 gallons of new motor oil per month when averaged over
the calendar year shall be monitored by the permittee as specified above.
2 Measurement Frequency: Once per year with samples taken within the sampling
window of April through November.
3 Sample Location: Samples to be taken at each Stormwater discharge
outfall (SDO) that discharges Stormwater runoff from area(s) where
vehicle maintenance activities occur.
4 Total flow shall be; (a) measured continuously, (b) calculated based on the amount
of area draining to the outfall, the amount of built -upon (impervious) area, and the
total amount of rainfall, or (c) estimated by the measurement of flow at 20 minute
intervals during the rainfall event. Total Precipitation and duration of the rainfall
event measured shall result from the sampled representative storm event.
5 Total recoverable lead monitoring is required only at facilities where fueling occurs.
6 Detergent monitoring is required only at facilities which conduct vehicle cleaning
operations.
(5) Cut-off Concentrations for Vehicle Maintenance Activities
The arithmetic mean of all analytical sampling results collected during the temi of the permit
shall be calculated for each parameter and compared to the cut-off concentrations listed below.
If the arithmetic mean meets the specified cut-off concentration condition for a given parameter,
then the facility is not required to continue annual analytical monitoring for that parameter
during the term of the permit unless a significant change in facility operations or configuration
occurs. If a cut-off concentration results in discontinued analytical monitoring, the permittee is
Page 10

Permit No. NCS000010
required to maintain facility operations that ensure the continuation of stormwater runoff
quality.
The permittee must perform analytical sampling during the first and last year of the permit term
regardless of cut-off concentration conditions. Analytical results from sampling during the
final year of the permit term must be submitted with the permit renewal application.
t rmwat r Discharge
han cteritic
Cut-off Concentration
H1
within range 6.0 - 9.0
Oil and Grease
< 30 mg/1
Lead, Total Recoverable
< 0.033 m /l
Total Suspended Solids
< 100 mg/1
Detergents (MBAS)
< 0.50 m /l
Footnotes:
1 pH cannot be averaged due to the nature of the logarithmic pH scale. The most recent pH
sample result shall be used for cut-off concentration purposes.
Page 11

Permit No. NCS000010
6'II�il�► '�.X�TCI�I�]i11f�7�I�K���
The permittee shall comply with Final Limitations and Controls specified for stormwater
discharges in accordance with the following schedule:
The Stormwater Pollution Prevention Plan shall be developed and implemented within 12
months of the effective date of this permit and updated thereafter on an annual basis.
Secondary containment, as specified in Part I, Section A, 1. b. 2. of this permit, shall be
accomplished within 12 months of the effective date of this permit.
Permittee shall at all times provide the operation and maintenance necessary to operate the
permitted stormwater controls at optimum efficiency.
Page 12

NEWS & RECORD
Published by
News & Record, Inc.
Greensboro, North Carolina
.th Carolina, Guilford County
AFFIDAVIT OF PUBLICATION
fore the undersigned, a Notary Public of said
runty and State, duly commissioned, qualified and
ithorized by law to administer oaths, personally
)peared Betty Pitchford who being first duly
corn, deposes and says:
That she is Inside Sales Manager of the Greens-
boro News Company, a corporation, engaged in
the publication of newspapers known as "News
and Record", published., issued and entered as
second class mail in the City of Greensboro in
said County and State;
1. That she is authorized to make this affidavit
and sworn statement; that the notice or other
legal advertisement, a true copy paf which is
attached hereto, was published in/1:
GREENSBORO NEWS & RECORDi• F"
on the following : D datesJU` � 4 94
June 30, 1994 DEM B�`�sE7p�F/�
for NPDES and
placed through ENVIRONMENTAL MANAGEMENT BUDGET OF-
FICE
3. That the said newspaper (or newspapers) in
which such notice, paper, document, or legal
advertisement was published was, at the time
of each and every such publication, a newspa-
per meeting all of the requirements and quali-
fications of Section 1-597 of the General
Statutes of North Carolina and was a qualified
newspaper within the meaning of Section 1-597
of the General Statutes of North Carolina.
This 30th day of June , 1994
Sworn to and--�ubscribed before me, this BG day of
JL ne- 119 9 4
oo arm
My commision expires: April. 6, 1996