NC0003719_Permit (Modification)_20020206

NPDES DOCUMENT 5CANNINO COVER !MEET
NC0003719
Cedar Creek site WWTP
NPDES Permit:
Document Type:
Permit Issuance
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification)
Complete File - Historical
Engineering Alternatives (EAA)
Correspondence
Owner Name Change
Monitoring Report
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Document Date:
February 6, 2002
This; document is printed on reuse paper - more ;my -
content on the resterse side

State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
Michael F. Easley, Governor
William G. Ross, Jr., Secretary
Gregory J. Thorpe, Ph.D., Acting Director
February 6, 2002
Ms. Deborah R. Small, Plant Manager
Monsanto Company
P.O. Box 2307
Fayetteville, North Carolina 28302
M
NCDENR
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
Subject: Modification to NPDES Permit NC0003719
Monsanto - Fayetteville W\XTTP
Cumberland County
Dear Ms. Small:
On January 15, 2002, a draft permit for the subject facility was sent to the Monsanto Company. On
January 29, 2002, we had a conversation regarding the extension of the first phase of Monsanto's permit. As per
our discussion, I am extending all clean-up related schedules from September 30, 2002 to January 31, 2003. This
concerns Parts A. (1.)-(4.) and Parts A. (9.) and A.(10.). As you know, this is the longest extension permissible
without Monsanto's applying for a major modification. As you proceed further along in your clean-up efforts, you
may decide that you wish to extend the first phase of the permit further; the application form and fees for a major
modification are available on the NPDES Unit web site at: http://h2o.enr.state.nc.us/NPDES/NPDESweb.html.
Please find enclosed the revised permit pages. The revised pages should be inserted into your
permit. The old pages may then be discarded. All other terms and conditions contained in the original
permit remain unchanged and in full effect. This permit modification is issued under the requirements of
North Carolina General Statutes 143-215.1 and the Memorandum of Agreement between North Carolina
and the U. S. Environmental Protection Agency.
If any parts, measurement frequencies or sampling requirements contained in this permit modification 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 a written petition conforming to Chapter 150B of the North
Carolina General Statutes, filed with the Office of Administrative Hearings (6714 Mail Service Center, Raleigh,
North Carolina 27699-6714). Unless such demand is made, this decision shall be final and binding.
Attached please find the modified permit pages. Please insert these into your permit and discard the relevant pages
in your existing permit.
Please note that this permit is not transferable except after notice to the Division. The Division may
require modification or revocation and reissuance of the permit. This permit does not affect the legal requirements
to obtain other permits which may be required by the Division of Water Quality or permits required by the
Division of Land Resources, the Coastal Area Management Act or any other Federal or Local governmental permit
that may be required.
If you have any questions concerning this permit modification, please contact me at [phone],
extension 551.
Sincerely,
o2x C egory J. Thorpe, Ph.D.
cc: Fayetteville Regional Office, Water Quality Section
EPA Region 4
Central Files
NPDES Unit
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled / 10% post -consumer paper

Permit NC0003719
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provision of North Carolina General Statute 143-215.1, other lawful standards
and regulations promulgated and adopted by the North Carolina Environmental Management
Commission, and the Federal Water Pollution Control Act, as amended,
Monsanto Company
is hereby authorized to discharge wastewater from a facility located at
Monsanto - Fayetteville
3468 Cedar Creek Road
Fayetteville
Cumberland County
to receiving waters designated as the Cape Fear River in the Cape Fear River Basin
in accordance with effluent limitations, monitoring requirements and other
conditions set forth in Parts I, II, III and IV hereof.
This permit shall become effective March 1, 2002.
This permit and authorization to discharge shall expire at midnight on October 31, 2006.
Signed this day February 6, 2002.
op -!Gregory J. Thorpe, Ph.D., Acting Director
Division of Water Quality
By Authority of the Environmental Management Commission

Permit NC0003719
SUPPLEMENT TO PERMIT COVER SHEET
Monsanto Company, is hereby authorized to:
1. Continue to operate an existing 1.25 MGD wastewater treatment facility consisting
of flow equalization, spill basin, pH adjustment, oil skimming, comminute, dual
aeration basins, clarifier, parshall flume, sludge pump station, dual aerobic
digesters, aerated biosolids holding basin, biosolids drying beds and other
associated equipment located at Monsanto company, Fayetteville Plant, on NC
Highway 53, south of Fayetteville in Cumberland County.
2. Upon closure and clean-up of the Monsanto RoundUp plant, continue to operate
an existing 1.25 MGD wastewater treatment facility with a permitted discharge of
0.5 MGD consisting of flow equalization, spill basin, pH adjustment, oil skimming,
comminute, dual aeration basins, clarifier, parshall flume, sludge pump station,
dual aerobic digesters, aerated biosolids holding basin, biosolids drying beds and
other associated equipment located at Monsanto Company, Fayetteville Plant, on
NC Highway 53, south of Fayetteville in Cumberland County.
3. Discharge water from said treatment works at the location specified on the
attached map into the Cape Fear River which is classified C waters in the Cape
Fear River Basin
4. Upon sale of the Monsanto Fayetteville facility, the new owner shall request a
modification to the NPDES permit and complete a new application for discharge in
accordance with special condition A. (5.) for an ultimate permitted flow of 1.25
MGD.
5. Discharge stormwater from the outfall specified on the attached map (and other
outfalls specified in the July 31, 1992 stormwater permit application) into the
Cape Fear River which is classified C waters in the Cape Fear River Basin.
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.

Permit NC0003719
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS — FINAL
During the period beginning on the effective date of this permit and lasting until January 31, 2003, the Permittee
is authorized to discharge from outfall 002. Such discharges shall be limited and monitored by the Permittee as
specified below:
Ff Ou •.t Ci iarac�is t s.: -
- ` Limits
11 a�nitxnir g ET equirernen
.
Olith Avenge
_ ..
t lyMaxim-UM
Measurement '
, 1uncy_.......
ample
O
Sat p eLot tiotit:.
.•_... _...
Flow
1.25 MGD
Continuous
Recording
Influent or Effluent
Total Suspended Solids (TSS)
457.0 IbJday
914.0 IbJday
3/Week
Composite
Effluent
BOD5, 20°C (April 1— October 31)
191.0 lb./day
382.0 IbJday
3/week
Composite
Effluent
BOD5, 20°C (November 1— March
31)
382.0 IbJday
764.0 IbJday
3/week
Composite
• Effluent
COD
5000.0 Ib./day
8000Ib./day
3/week
Composite
Effluent
NH3-N (April 1-October 31)
35.0 IbJday
70.0 lb./day
3/week
Composite
Effluent
NH3-N (November 1— March 31)
70.0 IbJday
140.0 IbJday
3/week
Composite
Effluent
Fecal Coliform (geometric mean)
3/week
Grab
Effluent
Total Nitrogen (NO2 + NO3 + TKN)
Quarterly
Composite
Effluent
Total Phosphorus
Quarterly
Composite
Effluent
Giyphosate3
2/month
Composite
Effluent
Total Residual Chlorine
3/Week
Grab
Effluent
Acute Toxicity2
Quarterly
Composite
Effluent
pH4
3/week
Grab
Effluent
_Dissolved 0xygens
Weekly
Grab
Effluent
Dissolved 0xygens
(June 1— September 30)
3/week
Grab
Upstream,
Downstream6.7
Temperature (4C)
Weekly
Grab
Effluent
Temperature (°C)
(June 1— September 30)
3/week
Grab
Upstream,
Downstream6.7
Conductivity
(June 1— September 30)
3/Week
Grab
Upstream,
Downstreamv
Notes:
1 Sample locations: Upstream - upstream 2 miles from outfall; Downstream - downstream, 100 yards upstream of Lock and
Dam #3.
2 Whole Effluent Toxicity shall be measured by a P/F at 90% acute toxicity test using Fathead Minnow. Test shall be
conducted in February, May, August and November. See Part A. (5.). Samples for toxicity testing shall be collected at the
combined outfall box located below outfalls 001 and 002.
3 Once cleanup of glyphosate production area is complete, Monsanto Company shall submit a letter to the Division giving
the shutdown and cleanup dates. After this date, Monsanto shall sample for glyphosate six (6) additional times over the
course of three months. If these samples result in non -detects for glyphosate, glyphosate monitoring may be terminated.
If glyphosate is detected, the source should be identified and cleaned; glyphosate monitoring shall continue until such
point at which it is not detected in six (6) samples.
4 The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units.
5 The daily average dissolved oxygen effluent concentration shall not be less than 5.0 mg/L. Effluent samples for dissolved
oxygen testing shall be collected at the combined outfall box located below outfalls 001 and 002.
6 Instream monitoring shall be conducted as follows: 3/week June 1 - September 30; 1 /week: October 1-May 31.
7 As a participant in the Middle Cape Fear River Basin Association, the instream monitoring requirements as stated above
are waived. Should your membership in the agreement be terminated, you shall notify the Division immediately and the
instream monitoring requirements specified in your permit shall be reinstated.
There shall be no chromium, zinc, or copper added to the treatment system except as pre -approved
additives to biocide compounds or that which results from the normal degradation of piping and
equipment used in process units.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

Permit NC0003719
A. (2.) EFFLUENT LIMITATIONS AND MONITORING REQIREMENTS - FINAL
During the period beginning on the effective date of the permit and lasting until January 31, 2003, the Permittee
is authorized to discharge from outfall 002. Such discharges shall be limited and monitored by the Permittee as
suecified below:
Effluent
Characteristics
Limits
DAILY
MAXIMUM
(1bs./day)
MONTHLY
AVERAGE
(lbs./day)
Monitoring
MEASUREMENT
FREQUENCY
Requirements
SAMPLE
SAMPLE
LOCATION'
Acenaphihene
0.107
0.040
Annual
Grab
E
Acenaphthylene
0.107
0.040
Annual
Grab
E
Acrylonitrile
0.440
0.174
Annual
Grab
E
Anthracene
0.107
0.040
Annual
Grab
E
Benzene
0.247
0.067
Annual
Grab
E
Benzo(a)anthracene
0.107
0.040
Annual
Grab
E
3,4-Benzofluoranthene
0.111
0.042
Annual
Grab
E
Benzo(k)fluoranthene
0.107
0.040
Annual
Grab
E
Benzo(a)pyrene
0.111
0.042
Annual
Grab
E
Bis(2-ethylhexyl) phthalate
0.507
0.187
Annual
Grab
E
Carbon Tetrachloride
0.069
0.033
Annual
Grab
E
Chlorobenzene
0.051
0.027
Annual
Grab
E
Chloroethane
0.487
0.189
Annual
Grab
E
Chloroform
0.084
0.038
Annual
Grab
E
2-Chlorophenol
0.178
0.056
Annual
Grab
E
Chrysene
0.107
0.040
Annual
Grab
E
Di-n-butyl phthalate
0.104
0.049
Annual
Grab
E
1,2-Dichlorobenzene
0.296
0.140
Annual
Grab
E
1,3-Dichlorobenzene
0.080
0.056
Annual
Grab
E
1,4-Dichlorobenzene
0.051
0.027
Annual
Grab
E
1,1-Dichloroethane
0.107
0.040
Annual
Grab
E
1,2-Dichloroethane
0.383
0.124
Annual
Grab
E
1,1-Dichloroethylene
0.045
0.029
Annual
Grab
E
1,2-trans-Dichloroethylene
0.098
0.038
Annual
Grab
E
2,4-Dichlorophenol
0.204
0.071
Annual
Grab
E
1,2-Dichloropropane
0.418
0.278
Annual
Grab
E
1,3-Dichloropropylene
0.080
0.053
Annual
Grab
E
Diethyl phthalate
0.369
0.147
Annual
Grab
E
2,4-Dimethylphenol
0.065
0.033
Annual
Grab
E
Dimethyl phthalate
0.085
0.035
Annual
Grab
E
4,6-Dinitro-o-cresol
0.503
0.142
Annual
Grab
E
2,4-Dinitrophenol
0.224
0.129
Annual
Grab
E
2,4-Dinitrotoluene
0.518
0.205
Annual
Grab
E
2,6-Dinitrotoluene
1.165
0.463
Annual
Grab
E
Ethylbenzene
0.196
0.058
Annual
Grab
E
Fluoranthene
0.124
0.045
Annual
Grab
E
Fluorene
0.107
0.040
Annual
Grab
E
Hexachlorobenzene
Annual
Grab
E
Hexachlorobutadiene
0.089
0.036
Annual
Grab
E
Hexachloroethane
0.098
0.038
Annual
Grab
E
I , y Corn anic -

Permit NC00037 19
A. (2.) Continued
(�,, f� ties..., 2.
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Methyl Chloride
0.345
0.156
Annual
Grab
E
Methylene Chloride
0.162
0.073
Annual
Grab
E
Naphthalene
0.107
0.040
Annual
Grab
E
Nitrobenzene
0.124
0.049
Annual
Grab
E
2-Nitrophenol
0.125
0.075
Annual
Grab
E
4-Nitrophenol
0.225
0.131
Annual
Grab
E
Phenanthrene
0.107
0.040
Annual
Grab
E
Phenol
0.047
0.027
Annual
Grab
E
Pyrene
0.122
0.045
Annual
Grab
E
Tetrachloroethylene
0.102
0.040
Annual
Grab
E
Toluene
0.145
0.047
Annual
Grab
E
Total Chromium
5.034
2.017
Quarterly
Grab
E
Total Copper
6.142
2.635
Quarterly
Grab
E
Total Cyanide
2.181
0.763
Quarterly
Grab
E
Total Lead
1.254
0.582
Quarterly
Grab
E
Total Nickel
7.233
3.071
Quarterly
Grab
E
Total Zinc
Quarterly
Grab
E
1,2,4-Trichlorobenzene
0.254
0.124
Annual
Grab
E
1,1,1-Trichloroethane
0.098
0.038
Annual
Grab
E
1,1,2-Trichloroethane
0.098
0.038
Annual
Grab
E
Trichloroethylene
0.098
0.038
Annual
Grab
E
Vinyl Chloride
0.487
0.189
Annual
Grab
E
} 1`rg
a, a ,.,c n r "'
4.ti
(..
i
91;4,4J
FP Le Ji 0
.: ,apt
,
a^s
tT IQN'''..
Total PAHs2
69.70
Quarterly
Composite
E
Hexachlorobenzene
1.73
Quarterly
Composite
E
Notes:
1. Sample Location: E - Effluent, I - Influent
2. Total PAHs are comprised of Benzo(a)anthracene; Benzo(a) pyrene; 3,4-Benzofluoranthene;
Benzo(k)fluoranthene; Chrysene; Dibenz(a,h)anthracene and Indeno(1,2,3-ed)pyrnene.
Note: Composite samples must be refrigerated

Permit NC0003719
A. (3.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS - FINAL
During the period beginning on February 1, 2003 and lasting until expiration, the Permittee is authorized to
discharge from outfall 002. Such discharges shall be limited and monitored by the Permittee as specified below:
Effluent Characteristics
Limi s : =:'
Monitoring Requirements
Mohlhty. avvrage .
D--ii ax`imum:
Measurement
at a
Sa npte• .ocatloil
Flow
0.5 MGD
Continuous
Recording
Influent or Effluent
Total Suspended Solids (TSS)
72.5 lb./day
235.7 Ibfday
Weekly
Composite
Effluent
BOD5, 200C
43.4 lb./day
115.7 lb./day
Weekly
Composite
Effluent
COD
Weekly
Composite
Effluent
NHs-N (April 1-0ctober 31)
35.0 lb./day
70.0 lb./day
Weekly
Composite
Effluent
NH3-N (November 1- March 31)
70.0 IbJday
140.0 Ib./day
Weekly
Composite
Effluent
Fecal Coliform (geometric mean)
Weekly
Grab
Effluent
Total Nitrogen (NO2 + NO3 + TKN)
Quarterly
Composite
Effluent
Total Phosphorus
Quarterly
Composite
Effluent
Total Residual Chlorine
Weekly
Grab
Effluent
Acute Toxicity2
Quarterly
Composite
Effluent
pH3
Weekly
Grab
Effluent
Dissolved Oxygen4
Weekly
Grab
Effluent
Dissolved 0xygen4
(June 1- September 30)
3/week
Grab
Upstream,
Downstream5.6
Temperature (9C)
Weekly
Grab .
Effluent
Temperature (4C)
(June 1- September 30)
3/week
Grab
Upstream,
Downstream5.6
Conductivity
(June 1- September 30)
3/Week
Grab
Upstream,
Downstream5.6
Notes:
1 Sample locations: Upstream - upstream 2 miles from outfall; Downstream - downstream, 100 yards
upstream of Lock and Dam #3.
2 Whole Effluent Toxicity shall be measured by a P/F at 90% acute toxicity test using Fathead Minnow. Test
shall be conducted in February, May, August and November. See Part A. (5.). Samples for toxicity testing
shall be collected at the combined outfall box located below outfalls 001 and 002.
3 The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units.
4 The daily average dissolved oxygen effluent concentration shall not be less than 5.0 mg/L. Effluent samples
for dissolved oxygen testing shall be collected at the combined outfall box located below outfalls 001 and 002.
5 Instream monitoring shall be conducted as follows: 3/week June 1 - September 30
1/week: October 1-May 31.
6 As a participant in the Middle Cape Fear River Basin Association, the instream monitoring requirements as
stated above are waived. Should your membership in the agreement be terminated, you shall notify the
Division immediately and the instream monitoring requirements specified in your permit shall be reinstated.
There shall be no chromium, zinc, or copper added to the treatment system except as pre -
approved additives to biocide compounds or that which results from the normal degradation of
piping and equipment used in process units.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

Permit NC0003719
A. (4.) EFFLUENT LIMITATIONS AND MONITORING REQIREMENTS - FINAL
During the period beginning on February 1, 2003 and lasting until expiration, the Permittee is authorized to
discharge from outfa11002. Such discharges shall be limited and monitored by the Permittee as specified below:
.� +K
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Acenaphthene
0.107
0.040
Annual
Grab
E
Acenaphthylene
0.107
0.040
Annual
Grab
E
Acrylonitrile
0.440
0.174
Annual
Grab
E
Anthracene
0.107
0.040
Annual
Grab
E
Benzene
0.247
0.067
Annual
Grab
E
Benzo(a)anthracene
0.107
0.040
Annual
Grab
E
3,4-Benzofluoranthene
0.111
0.042
Annual
Grab
E
Benzo(k)fluoranthene
0.107
0.040
Annual
Grab
E
Benzo(a)pyrene
0.111
0.042
Annual
Grab
E
Bis(2-ethylhexyl) phthalate
0.507
0.187
Annual
Grab
E
Carbon Tetrachloride
0.069
0.033
Annual
Grab
E
Chlorobenzene
0.051
0.027
Annual
Grab
E
Chloroethane
0.487
0.189
Annual
Grab
E
Chloroform .
0.084
0.038
Annual
Grab
E
2-Chlorophenol
0.178
0.056
Annual
Grab
E
Chrysene
0.107
0.040
Annual
Grab
E
Di-n-butyl phthalate
0.104
0.049
Annual
Grab
E
1,2-Dichlorobenzene
0.296
0.140
Annual
Grab
E
1,3-Dichlorobenzene
0.080
0.056
Annual
Grab
E
1,4-Dichlorobenzene
0.051
0.027
Annual
Grab
E
1,1-Dichtoroethane
0.107
0.040
Annual
Grab
E
1,2-Dichloroethane
0.383
0.124
Annual
Grab
E
1,1-Dichloroethylene
0.045
0.029
Annual
Grab
E
1,2-trans-Dichloroethylene
0.098
0.038
Annual
Grab
E
2,4-Dichlorophenol
0.204
0.071
Annual
Grab
E
1,2-Dichloropropane
0.418
0.278
Annual
Grab
E
1,3-Dichloropropylene
0.080
0.053
Annual
Grab
E
Diethyl phthalate
0.369
0.147
Annual
Grab
E
2,4-Dimethylphenol
0.065
0.033
Annual
Grab
E
Dimethyl phthalate
0.085
0.035
Annual
Grab
E
4,6-Dinitro-o-cresol
0.503
0.142
Annual
Grab
E
2,4-Dinitrophenol
0.224
0.129
Annual
Grab
E
2,4-Dtnitrotoluene
0.518
0.205
Annual
Grab
E
2,6-Dinitrotoluene
1.165
0.463
Annual
Grab
E
Ethylbenzene
0.196
0.058
Annual
Grab
E
Fluoranthene
0.124
0.045
Annual
Grab
E
Fluorene
0.107
0.040
Annual
Grab
E
Hexachlorobenzene
- Annual
Grab
E
Hexachtorobutadiene
0.089
0.036
Annual
Grab
E
Hexachloroethane
0.098
0.038
Annual
Grab
E

Permit NC0003719
A.(4.) Continued
:
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Sit i
Methyl Chloride
Methylene Chloride
Naphtha!ene
Nitrobenzene
2-Nitrophenol
4-Nitrophenol
Phenanthrene
Phenol
Pyrene
Tetrachloroethylene
Toluene
Total Chromium
Total Copper
Total Cyanide
Total Lead
Total Nickel
Total Zinc
1,2,4-Trichlorobenzene
1,1,1 Trichloroethane
1,1,2-Trichloroethane
Trichloroethylene
Vinyl Chloride
!
lams•
0.345
0.162
0.107
0.124
0.125
0.225
0.107
0.047
0.122
0.102
0.145
5.034
6.142
2.181
1.254
7.233
0.254
0.098
0.098
0.098
0.487
S
�+
....
0.156
0.073
0.040
0.049
0.075
0.131
0.040
0.027
0.045
0.040
0.047
2.017
2.635
0.763
0.582
3.071
0.124
0.038
0.038
0.038
0.189
s
r r
Annual
Annual
Annual
Annual
Annual
Annual
Annual
Annual
Annual
Annual
Annual
Quarterly
Quarterly
Quarterly
Quarterly
Quarterly
Quarterly
Annual
Annual
Annual
Annual
Annual
4
Grab
Grab
Grab
Grab
Grab
Grab
Grab
Grab
Grab
Grab
Grab
Grab
Grab
Grab
Grab
Grab
Grab
Grab
Grab
Grab
Grab
Grab
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
: ,
Notes:
1. Sample Location: E - Effluent, I - Influent
Note: Composite samples must be refrigerated

Permit NC0003719
A, (9.) STORMWATER MONITORING REQUIREMENTS/Analytical Monitoring
FINAL
During the period beginning on the effective date of the permit and lasting until January 31, 2003, the Permittee
is authorized to discharge from outfall(s) serial number 001 (Stormwater). Such discharges shall be limited and
monitored by the permittee as specified below:
Total Flow4
MG
Annual
SW-1
Total Rainfall4
Inches
Annual
SW-1
Event Duration`
Minutes
Annual
SW-1
Total Suspended
Solids
mg/L
100.00
Annual
Grab
SW-1
Nickel
Lead
µ9�
789.00
33.78
Annual
Annual
Grab
Grab
SW-1
SW-1
Di-n-butyl phthalate
Glyphosate
mg/L
Annual
Grab
SW-1
Isopropylamine
Surfactants (MBAS)
mg/L
Annual
Grab
SW-1
mg/L
mg/I
100.0
Annual
Annual
Grab
Grab
SW-1
SW-1
Notes:
1. Cutoff Concentration. For each parameter, the arithmetic mean of all analytical sampling results
collected during the first year of the permit shall be calculated for each individual outfall and
compared to the cut-off concentrations listed. If the arithmetic mean is below the specified cut-off
concentration for a given parameter, then the facility is not required to continue annual analytical
monitoring for that parameter at the outfall during the term of the permit unless a significant
change in facility operations or configuration occurs. If cut-off concentration results in
discontinued analytical monitoring at an individual discharge outfall, the permittee is required to
maintain facility operations that ensure the continuation of stormwater runoff quality.
2. Measurement frequency. Once per year. The facility must perform analytical sampling during the
first full year 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. Failure to monitor storm events in accordance with the specified
frequency shall constitute a violation of this permit.
3. Sample Location. Samples to be collected at each stormwater discharge outfall (SW-1) located
north of the river water intake pump overflow and south of the sludge drying beds.
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 build -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 (not to exceed three hours).
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 Parts A. (13) and A. (14.)).

Permit NC0003719
A. (10.) STORMWATER MONITORING REQUIREMENTS/Analytical Monitoring
FINAL
During the period beginning on February 1, 2003 and lasting until permit expiration or expansion, the Permittee
is authorized to discharge from outfall(s) serial number 001 (Stormwater). Such discharges shall be limited and
monitored by the permittee as specified below:
Total Flow`}
MG
Annual
SW-1
Total Rainfall4
Inches
Annual
SW-1
Event Duration`
Minutes
Annual
SW-1
Total Suspended
Solids
mg/L
100.00
Annual
Grab
SW-1
Nickel
MA-
789.00
Annual
Grab
SW-1
Lead
33.78
Annual
Grab
SW-1
Di-n-butyl phthalate
mg/L
Annual
Grab
SW-1
Notes:
1. Cutoff Concentration. For each parameter, the arithmetic mean of all analytical sampling results
collected during the first year of the permit shall be calculated for each individual outfall and
compared to the cut-off concentrations listed. If the arithmetic mean is below the specified cut-off
concentration for a given parameter, then the facility is not required to continue annual analytical
monitoring for that parameter at the outfall during the term of the permit unless a significant
change in facility operations or configuration occurs. If cut-off concentration results in
discontinued analytical monitoring at an individual discharge outfall, the permittee is required to
maintain facility operations that ensure the continuation of stormwater runoff quality.
2. Measurement frequency. Once per year. The facility must perform analytical sampling during the
first full year 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. Failure to monitor storm events in accordance with the specified
frequency shall constitute a violation of this permit.
3. Sample Location. Samples to be collected at each stormwater discharge outfall (SW-1) located
north of the river water intake pump overflow and south of the sludge drying beds.
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 build -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 (not to exceed three hours).
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 Parts A. (13) and A. (14.)).