NC0024325_Permit (Issuance)_20120824

NPDES DOCUMENT SCANNINO COVER SHEET
NPDES Permit:
NC0024325
North Buffalo Creek WWTP
Document Type: I
Permit Issuance
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Complete File - Historical
Engineering Alternatives (EAA)
Correspondence
Owner Name Change
Staff Report
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Document Date:
August 24, 2012
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Permit No. NC0024325
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 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
City of Greensboro
is hereby authorized to discharge wastewater from a facility located at the
North Buffalo WWTP
2199 White Street, Greensboro
Guilford County
to receiving waters designated as North Buffalo Creek 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 October 1, 2012.
This permit and authorization to discharge shall expire at midnight on June 30, 2016.
Signed this day August 24, 2012.
for`G34rles Wakild, P.E., Director
Division of Water Quality
By Authority of the Environmental Management Commission

Permit No. NC0024325 r .
SUPPLEMENT TO PERMIT COVER SHEET
All previous NPDES Permits issued to this facility, whether for operation or discharge are hereby revoked. As of
this permit 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 included herein.
The City of Greensboro
is hereby authorized to:
1. Continue to operate an existing 16.0 MGD activated sludge wastewater treatment facility located at
the North Buffalo WWTP (2199 White Street, Greensboro, Guilford County). This facility includes
the following treatment components:
• Mechanical bar screens
• Influent flow measurement (Parshall flume and magnetic flow meter)
• Aerated grit removal
• Four primary settling tanks
• 80 MGD flow transfer pump station to TZ Osborne
From here the flow continues through one of the following treatment trains:
Original Train
• Two trickling filters (decommissioned)
• Activated sludge with nitrification (4 aeration basins with fine bubble diffusers)
• Step feed process (removed)
• Chemical addition for phosphorus removal
• Five secondary clarifiers
#2 Train - decommissioned
Activated sludge with nitrification (1)
Secondary clarifiers (2)
The flows from the two separate trains come together and continue through the following
treatment processes:
• Four tertiary sand filters
• Effluent flow measurement (Parshall flume)
• Chlorination & Dechlorination
• Effluent aeration
2. Discharge from said treatment works (via Outfall 001) into North Buffalo Creek, a Class WS-V,
NSW stream in the Cape Fear River Basin, at the location specified on the attached map.
ii

Adair
USGS Quad #: C20SW
Lat. 36° 06' 34" Long. -79° 44' 53"
SCALE o
1:24,000
(1" = 2000')
City of Greensboro — North Buffalo WWTP
N C0024325
County:
Receiving Stream:
Stream Classification:
River Basin:
Sub-Basin/8-Digit HUC #:
Guilford
North Buffalo Creek
WS-V, NSW
Cape Fear
03-06-02 / 03030002
111

Permit No. NC0024325
S �l
A.(1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS - Outfall 001
During the period beginning on the effective date of this permit and lasting until 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:
EFFLUENT
CHARACTERISTICS
EFFLUENT LIMITATIONS •
MONITORING RTS EQUIREMEN
�. _ �__._ _, _ _ .w ,.
Monthly
Average
Weekly
' Average
_
Daily'
Maximum
Measur.'emeni
Frequency
.Sample;Typ
SampleLocafion
How
16.0 MGD
Continuous
Recording
Influent or Effluent
Total Monthly Flow (MG)
Monitor & Report
Monthly
-
Rec. or Calc.
Influent or Effluent
CBOD, 5-day, 20°C (Summer)2
8.0 mg/L
12.0 mg/L
Daily
Composite
Influent & Effluent
CBOD, 5-day, 20°C (Winter)2
16.0 mg/L
24.0 mg/L
Daily
Composite
Influent & Effluent
Total Suspended Solids2
30.0 mg/L
45.0 mg/L
•
Daily
Composite
Influent & Effluent
NH3 as N (Summer)
4.0 mg/L
12.0 mg/L
Daily
Composite
Effluent
NH3 as N (Winter)
8.0 mg/L
24.0 mg/L
Daily
Composite
Effluent
Fecal Coliform
(geometric mean)
200/100mL
400/100mL
Daily
.
Grab
Effluent
Dissolved Oxygen 3
Daily
Grab
Effluent
Temperature (°C)
Daily
Grab
Effluent
pH 4
.
Daily
Grab
Effluent
Total Residual Chlorine 5
17.0 µg/L
Daily
Grab
Effluent
TKN
Monitor & Report (mg/L)
Weekly
Composite
Effluent
NO3-N + NO2-N
Monitor & Report (mg/L)
Weekly
Composite
Effluent
Total Nitrogen, TN 6
• Monitor & Report (mg/L)
Weekly
Composite
Effluent
TN Load'$ [parameter codes]
Monitor &Report (Ib/mo) [QM600]
Monitor & Report (Ib/yr) [QY600]
Monthly
Annually
Calculated
Effluent
Total Phosphorus, TP
Monitor & Report (mg/L)
Weekly
Composite
Effluent
TP Load''$ [parameter codes]
MMonitoronitor &&ReportReport (Ib/moyr)) [QM665]
([b/[QY665]
Monthly
Annually
Calculated
Effluent
Total Cyanide 9
Quarterly
Grab
Effluent
Total Mercury 10
0.012 pg/L
0.036 pg/L
Quarterly
Grab
Effluent
Fluoride
Quarterly
Composite
Effluent
Total Copper
Quarterly
Composite
Effluent
Total Zinc
Quarterly
Composite
Effluent
Chronic Toxicity 11
Quarterly
Composite
Effluent
Effluent Pollutant Scan
Monitor & Report
See Special Condition A.(4.)
Dissolved Oxygen 12
12
Grab
U, D1, D2, D3
Fecal Coliform 12
12
Grab
U, D1, D2, D3
Temperature (°C) 12
12
Grab
U, D1, D2, D3
Conductivity 12
!2
Grab
U, D1, D2, D3
All footnotes are listed on the following page.
PART I, Page 1 of 8

Permit No. NC0024325
Footnotes:
(Summer): April 1- October 31
(Winter): November 1- March 31
(Daily): every day on which a wastewater discharge occurs except Saturdays, Sundays, and legal
holidays unless otherwise specified by the Director.
1. U: Upstream at the influent conduit. D1: Downstream at the unimproved road 0.8 miles east of
White/Nealtown Road intersection. D2: Downstream at Rankin Mill Road. D3: Downstream in
Buffalo Creek at McCleansville Road.
2. The monthly average effluent CBOD5 and TSS concentrations shall not exceed 15% of the
respective influent value (85% removal).
3. The daily effluent dissolved oxygen concentration shall not be less than 6.0 mg/L.
4. The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units.
5. The Division shall consider all effluent TRC values reported below 50 ug/L to be in compliance
with the permit. However, the Permittee shall continue to record and submit all values reported by
a North Carolina certified laboratory (including field certified), even if these values fall below 50
ug/ L.
6. TN is Total Nitrogen = TKN + NO3-N + NO2-N, where TKN is Total Kjeldahl Nitrogen, NO3-N and
NO2-N are Nitrate and Nitrite Nitrogen, respectively.
7. TN or TP Load is the mass quantity of Total Nitrogen or Phosphorus discharged in a given period
of time. See Special Condition A.(7.), Calculation and Reporting of Nutrient Loads.
8. The facility is subject to nutrient limitations as specified in Special Condition A.(2.), Combined
Limitations for Nutrients.
9. The quantitation limit for cyanide shall be 20 µg/L; levels reported below 20 µg/L shall be
considered zero for compliance purposes.
10. Effluent samples must be analyzed by an EPA -approved low level mercury analysis method.
The City can request that the mercury limits be modified once the mercury TMDL is adopted.
11. Chronic Toxicity (Ceriodaphnia) at 90% with testing in January, April, July and October (see
Special Condition A. (3.)). TOXICITY MONITORING SHALL COINCIDE WITH METALS
MONITORING.
12. Instream monitoring requirements are waived as long as facility retains membership in the
UCFRBA. If membership is cancelled, facility will monitor 3/Week (June -September) and 1/Week
(October -May). Stream sampling may be discontinued at such times as flow conditions in the
receiving waters or extreme weather conditions will result in a substantial risk of injury or death to
persons collecting samples. Upon such discontinuance, stream sampling shall be resumed at the
first opportunity after the risk period has ceased.
There shall be no discharge of floating solids or visible foam in other than trace amounts.
PART I, Page 2 of 8

Permit No. NC0024325 •
•
A.(2.) COMBINED LIMITATIONS FOR NUTRIENTS - Outfall CO1
(a.) During the period beginning on the dates specified below and lasting until permit expiration,
the Permittee is further authorized to discharge Total Nitrogen and Total Phosphorus from the
T.Z. Osborne WWTP (NC0047384, Outfall 001) and the North Buffalo WWTP (NC0024325,
Outfall 001) subject to the following combined, delivered load limitations:
Total Nitrogen,
Delivered (Ib/yr)1
Total Phosphorus,
Delivered (Ib/yr)1
Permit
Facility
Active
Allocations
Combined
Limit
Active
Allocations
Combined
Limit
NC0047384
T.Z. Osborne WWTP
290,375
35,708
NC0024325
North Buffalo WWTP
110,698
13,591
(b.)
401,073
(effective 1/1/2016)2
Footnote:
49,299
(effective 1/1/2010)
1 Allocations and limits in this table are expressed as delivered loads. See Condition A.(7.) regarding
calculation of delivered loads from discharge loads.
2 Per the Jordan Lake Wastewater Discharge Rule (15A NCAC 02B .0270) as modified by North Carolina
Session Law 2011-394 (HB119), the annual mass Total Nitrogen limit shall be effective beginning with
calendar year 2016, unless the discharger has received by December 31, 2016, an authorization -to -construct
permit for construction, installation, or alteration of the treatment works for purposes of complying with
this limit, in which case the limit shall be effective beginning with calendar year 2018.
Compliance with these limits shall be determined in accordance with Special Conditions A.(6.),
Annual Limits for Total Nitrogen and Total Phosphorus, and A.(7.), Calculation and Reporting
of Nutrient Loads.
(c.) Nutrient monitoring and reporting requirements are specified in Special Conditions A.(1.),
Effluent Limitations and Monitoring Requirements, and A.(7.), Calculation and Reporting of
Nutrient Loads.
(d.) Pursuant to N.C. General Statute Section 143-215.1 and the implementing rules found in Title
15A of the North Carolina Administrative Code, specifically, 15A NCAC 02B.0270, and Part II,
Sections B-12 and B-13 of this permit, the Division of Water Quality (Division) may reopen the
permits listed above and establish more stringent nutrient limits upon finding that such limits
are necessary to prevent the discharges from causing localized water quality impacts in the
receiving streams.
(e.) The Permittee may request that its permits be modified to rescind these combined limits and
establish individual mass discharge limits for each facility. The Division may, after written
notification to the Permittee, rescind these combined limits and establish individual mass
discharge limits for each facility if it determines that the combined limits do not support the
objectives of the Jordan Lake Nutrient Management Strategy. The Division shall provide for
public review of the proposed permit modifications and include in the permit an appropriate
schedule of compliance for the proposed nutrient limits.
PART I, Page 3 of 8

Permit No. NC0024325
A.(3.) CHRONIC TOXICITY PASS/FAIL PERMIT LIMIT
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant
mortality to Ceriodaphnia dubia at an effluent concentration of 90%.
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
January, April, July, and October. 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:
NCDENR/ 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 Section 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.
PART I, Page 4 of 8

Permit No. NC0024325 ;
A.(4.) EFFLUENT POLLUTANT SCAN
The Permittee shall perform a total of three (3) Effluent Pollutant Scans for all parameters listed below. One scan
must be performed in each of the following years: 2013, 2014, and 2015. Analytical methods shall be in
accordance with 40 CFR Part 136 and shall be sufficiently sensitive to determine whether parameters are present
in concentrations greater than applicable standards and criteria. Samples should be collected with one quarterly
toxicity test each year, and must represent seasonal variation [i.e., do not sample in the same quarter every year].
Unless otherwise indicated, metals shall be analyzed as "total recoverable."
Ammonia (as N) Trans-1,2-dichloroethylene Bis (2-chloroethyl) ether
Chlorine (total residual, TRC) 1,1-dichloroethylene Bis (2-chloroisopropyl) ether
Dissolved oxygen 1,2-dichloropropane Bis (2-ethylhexyl) phthalate
Nitrate/Nitrite 1,3-dichloropropylene 4-bromophenyl phenyl ether
Kjeldahl nitrogen Ethylbenzene Butyl benzyl phthalate
Oil and grease Methyl bromide 2-chloronaphthalene
Phosphorus Methyl chloride 4-chlorophenyl phenyl ether
Total dissolved solids Methylene chloride Chrysene
Hardness 1,1,2,2-tetrachloroethane Di-n-butyl phthalate
Antimony Tetrachloroethylene Di-n-octyl phthalate
Arsenic Toluene Dibenzo(a,h)anthracene
Beryllium 1,1,1-trichloroethane 1,2-dichlorobenzene
Cadmium 1,1,2-trichloroethane 1,3-dichlorobenzene
Chromium Trichloroethylene 1,4-dichlorobenzene
Copper Vinyl chloride 3,3-dichlorobenzidine
Lead Acid -extractable compounds: Diethyl phthalate
Mercury (EPA Method 1631E) P-chloro-m-cresol Dimethyl phthalate
Nickel 2-chlorophenol 2,4-dinitrotoluene
Selenium 2,4-dichlorophenol 2,6-dinitrotoluene
Silver 2,4-dimethylphenol 1,2-diphenylhydrazine
Thallium 4,6-dinitro-o-cresol Fluoranthene
Zinc 2,4-dinitrophenol Fluorene
Cyanide 2-nitrophenol Hexachlorobenzene
Total phenolic compounds 4-nitrophenol Hexachlorobutadiene
Volatile organic compounds: Pentachlorophenol Hexachlorocyclo-pentadiene
Acrolein Phenol Hexachloroethane
Acrylonitrile 2,4,6-trichlorophenol Indeno(1,2,3-cd)pyrene
Benzene Base -neutral compounds: Isophorone
Bromoform Acenaphthene Naphthalene
Carbon tetrachloride Acenaphthylene Nitrobenzene
Chlorobenzene Anthracene N-nitrosodi-n-prgpylamine
Chlorodibromomethane Benzidine N-nitrosodimethylamine
Chloroethane Benzo(a)anthracene N-nitrosodiphenylamine
2-chloroethylvinyl ether . Benzo(a)pyrene Phenanthrene
Chloroform 3,4 benzofluoranthene Pyrene
Dichlorobromomethane Benzo(ghi)perylene 1,2,4-trichlorobenzene
1, 1-dichloroethane Benzo(k)fluoranthene
1,2-dichloroethane Bis (2-chloroethoxy) methane
Reporting: Test results shall be reported on DWQ Form A MR-PPA1 (or in a form approved by the
Director) by December 31st of each designated sampling year. The report shall be submitted to the
following address: NC DENR/ DWQ/ Central Files, 1617 Mail Service Center, Raleigh, North
Carolina 27699-1617.
PART I, Page 5 of 8

Permit No. NC0024325
A.(5.) NUTRIENT ALLOCATIONS
(a.) The following table lists the Total Nitrogen (TN) and Total Phosphorus (TP) allocations
assigned to, acquired by, or transferred to the Permittee in accordance with the Jordan Lake
nutrient management rule (T15A NCAC 02B .0270) and the status of each as of permit issuance.
For compliance purposes, this table does not supersede any TN or TP limit established
elsewhere in this permit or in the NPDES permit of a compliance association of which the
Permittee is a Co-Permittee Member.
Total Nitrogen Allocation
ALLOCATION
{
TYPE'
,
SOURCE .. :.
DATE ;
, d t
ALLOCATION AMOUNT'i `
STATUS
: -
Delivered
(Ili/yr)
Discharge
(Ib/yr);
Base
Assigned by Rule
(T15A NCAC 0213 .0270)
8/11/09
110,698
257,438
Active
TOTAL
110,698
257,438
Active
Footnote:
1 Nitrogen Transport Factor = 43%
• Total Phosphorus Allocation
ALLOCATION
TYPE
SOURCE
DATE
,
ALLOCATION AMOUNT
STATUS
. Delivered
(lb/yr)
Discharge , .
(Ib/yr)
Base
Assigned by Rule
(T15A NCAC 02B .0270)
8/11/09
13,591
32,359
Active
TOTAL
13,591
32,359
Active
Footnote:
1 Phosphorus Transport Factor = 42%
(b.) Any addition, deletion, or modification of the active allocation(s) listed above (other than to
correct typographical errors) or any change of allocation to 'active' status shall be considered a
major modification of this permit and shall be subject to the public review process afforded
such modifications under state and federal rules.
PART I, Page 6 of 8

Permit No. NC0024325 •
A.(6.) ANNUAL LIMITS FOR TOTAL NITROGEN AND TOTAL PHOSPHORUS
(a.) Total Nitrogen (TN) and Total Phosphorus (TP) allocations and load limits for NPDES
dischargers in the Jordan Lake watershed are annual loads and apply on a calendar year basis.
(b.) For any given calendar year, the Permittee shall be in compliance with the annual TN (or TP)
Discharge Load limit in this Permit if:
(i.) the Permittee's annual TN (or TP) Discharge Load is not greater than the effective limit, or
(ii.) the Permittee is a Co-Permittee Member of a compliance association.
(c.) The TN (or TP) limit in this Permit may be modified as the result of allowable changes in the
Permittee's allocation.
(i.)
(H.)
Allowable changes include those resulting froth purchase of TN (or TP) allocation from an
authorized mitigation banker, the Ecosystem Enhancement Program, or other source
allowed under applicable regulations; purchase, sale, trade, or lease of allocation between
the Permittee and other dischargers; regionalization; and other transactions approved by
the Division.
The Permittee may request a modification of the TN (or TP) limit in this Permit to reflect
allowable changes in its allocation(s).
(A) Upon receipt of timely and proper application, the Division will modify the permit as
appropriate and in accordance with state and federal program requirements.
(B) Changes in TN (or TP) limits become effective on January 1 of the year following
permit modification. The Division must receive application no later than August 31
for changes proposed for the following calendar year.
Any requests for modification should be sent to:
NCDENR/ DWQ/ NPDES Programs
Attn: Jordan Lake Watershed Coordinator
1617 Mail Service Center
Raleigh, NC 27699-1617
(d.) If the Permittee is a member and co-permittee of an approved compliance association on
January 1 of a given year, its TN and TP discharges during that year are governed by that
association's group NPDES permit and the limits therein.
The Permittee shall be considered a Co-Permittee Member for any given calendar year in
which it is identified as such in Appendix A of the association's group NPDES permit.
Association roster(s) and members' TN and TP allocations will be updated annually and in
accordance with state and federal program requirements.
If the Permittee intends to join or leave a compliance association, the Division must be
notified of the proposed action in accordance with the procedures defined in the
association's NPDES permit.
(A) Upon receipt of timely and proper notification, the Division will modify the permit as
appropriate and in accordance with state and federal program requirements.
(B) Membership changes in a compliance association become effective on January 1 of the
year following modification of the association's permit.
(e.) The TN and TP monitoring and reporting requirements in this Permit remain in effect
throughout the term of the Permit and are not affected by the Permittee's membership in a
compliance association.
PART I, Page 7 of 8

4' t
Permit No. NC0024325
A.(7.) CALCULATION AND REPORTING OF NUTRIENT LOADS
The Permittee shall calculate and report monthly and annual nutrient loads for the T.Z. Osborne
(NC0047384) and North Buffalo (NC0024325) WWTPs as follows:
(a.) Calculation of Discharge Loads: The Permittee shall calculate monthly and annual discharge
loads for each facility as follows:
(i.) Monthly Discharge Load (Ib/mo, TN or TP) = TN (or TP) x TMF x 8.34
where:
TN (or TP) = the average Total Nitrogen (or Total Phosphorus) concentration
(mg/L) of the composite samples collected during the month
TMF = the Total Monthly Flow of wastewater discharged during the
month (MG/mo)
8.34 = conversion factor, from (mg/L x MG) to pounds
(ii.) Annual Discharge Load (lb/yr, TN or TP) = Sum of the 12 Monthly TN (or TP) Loads for
the calendar year
(b.) Calculation of Delivered Loads:
(i.) The Permittee shall calculate delivered loads as follows:
(A) Individual, Annual Delivered Load (lb/yr, TN or TP) =
Annual Discharge Load (lb/yr, TN or TP) x TF
where TF = Transport Factor, as follows:
PERMIT
FACILITY
TFTN
TFrp
NC0047384
T.Z. Osborne WWTP
45%
44%
NC0024325
North Buffalo WWTP
43%
•42%
(A) Combined Annual Delivered Load (lb/yr) = Sum of the facilities' Individual Annual
Delivered TN (or TP) Loads for the calendar year
(c.) Reporting of Nutrient Discharges: The Permittee shall report each facility's monthly TN and
TP discharge loads in that facility's discharge monitoring report.
(d.) Reporting of Combined Delivered Loads: The Permittee shall report each calendar year's
combined delivered loads with the T.Z. Osborne WWTP's December report for that year and
shall append the report with a summary of monthly loads and calculations. The reported
Combined Delivered Loads should be clearly labeled in the December report.
A.(8.) NITROGEN OPTIMIZATION PLAN
On February 17, 2010 The City of Greensboro submitted a plan to optimize the reduction of nitrogen in
its wasterwater discharges. It is expected that the City of Greensboro will implement these measures
and continue to evaluate its treatment facilities and operational processes to make reasonable efforts to
reduce nitrogen discharges until process improvements are completed.
PART I, Page 8 of 8

NCDENR / DWQ
Final FACT SHEET/NPDES PERMIT RENEWAL
City of Greensboro/North Buffalo WWTP
NPDES No. NC0024325
Facility Information,:
(1.) Facility Name:
North Buffalo WWTP
(2.) Permitted Flow,MGD:
16.0 MGD
(6.) County:
Guilford
(3.) Facility Class:
4
(7.) Regional Office:
Winston Salem
(4.) Facility Status:
Existing
(8.) USGS Topo Quad:
C20SW
(McLeansville)
(5.) Permit Status:
Renewal
Stream Characteristics
(1.) Receiving Stream:
North Buffalo Creek
(2.) Subbasin/8-Digit HUC:
030602/03030002.
(8.) Drainage Area (mi2):
22.00
(3.) River Basin:
Cape Fear
(9.) Summer 7Q10 (cfs)
0.9
(4.) Stream Class:
WS-V; NSW
(10.) Winter 7Q10 (cfs):
2.6
(5.) 303(d) Listed:
YES
(11.) 30Q2 (cfs):
3.2
(6.) Index No.:
16-11-14-1b
(12.) Average Flow (cfs):
25.00
(7.) Use Support:
Not Supporting
(13.) IWC (%):
96.5 cYo
SUMMARY
This facility is a major municipal treatment plant operating in Guilford County. This
permit application was submitted by the City of Greensboro for the renewal of the
North Buffalo WWTP permit at the current plant design flow of 16 MGD. North Buffalo
WWTP discharges into North Buffalo Creek and has a separate sewer collection system.
For the past 3 years the average discharge flow was 5.6 MGD with a maximum of 10
MGD. A portion of the flow received at N.Buffalo is sent to T.Z. Osborne. The N.
Buffalo WWTP receives wastewaters from 5 significant industrial users and has a full-
scale pretreatment program.
WWTPs, TZ Osborne and North Buffalo, owned and operated by the City of Greensboro
ultimately discharge to the Haw River arm of Jordan Lake. The City has proposed to
expand the TZ Osborne facility to include biological nutrient removal and to close
down and receive wastewaters treated at the N. Buffalo facility (16 MGD). In 2010, the
City requested and received speculative limits for a combined discharge of 56 MGD
from the TZ Osborne facility to South Buffalo Creek. The City is currently pursuing
approval for the expansion of TZ Osborne to 56 MGD under the State Environmental
Policy Act (SEPA) Program.
The N. Buffalo WWTP discharges to North Buffalo Creek, which then discharges to
Buffalo Creek>Reedy Fork>Haw River>Jordan Lake. North Buffalo Creek is an
effluent -dominated stream, with the Greensboro discharge representing 96.5% of the
in -stream waste concentration. North Buffalo Creek is listed in the Draft 2012 303(d)
list for Cu, Zn, and Nitrite -Nitrate Nitrogen impairments. The nitrates impairment is
being addressed through nutrient limitation requirements specified in the Jordan
Lake Nutrient Management Strategy.

NPDES PERMIT FACT SHEET
Page 2
City of Greensboro- North Buffalo WWTP
NPDES No. NC0024325
With the adoption of the Jordan Lake Nutrient Management Strategy in Aug. 2009,
the City of Greenboro WWTPs will have to control nitrogen to meet the following
annual TN mass loadings by the year 2016.
Jordan Lake Rules End -of -Pipe Target TN Annual Mass Loadings
POTW
Permitted Flow
Annual Mass Load
Concentration
North Buffalo
16.0 MGD
257,438 pounds
5.29 mg/L
TZ Osborne
40.0 MGD
645,277 pounds
5.29 mg/L
The permit was modified in 2010 to reflect these requirements and this Draft permit
includes some revisions made to that rule in July 2011 which are noted in Section A.
(2.) Footnote 2. The revision extends the TN Combined Limit if an ATC is aquired for
purposes of complying with the allocation
As part of the Nutrient Management Strategy, North Buffalo Creek was reclassified as
a WS-V stream. The closest downstream intake on the Haw River is the Town of
Pittsboro's which is approximately 65 river miles below the TZ Osborne outfall.
Concerns regarding TN, ammonia and nitrates in South and North Buffalo Creek will
be addressed through the NPDES permits as the City proceeds with the expansion/
upgrades at TZ Osborne, the closing of N. Buffalo, and the City's implementation of a
nitrogen optimization plans.
North Buffalo Creek receives large amounts of urban runoff from the City of
Greensboro, as well as point source additions from Greensboro North Buffalo WWTP.
The City of Greensboro has developed a stormwater program that addresses problems
associated with nonpoint sources. North Carolina finalised the fecal TMDL for the
upper most section of North Buffalo Creek in April 2004. The TMDL does not require
any reductions in fecal load from point sources.
REASONABLE POTENTIAL ANALYSIS
Reasonable potential analyses were conducted for As, Be, Cd, Cr, Cu, CN, F, Pb, Hg,
Ni, Se, Zn, Fe and Chloride (see attached).
TOXICITY TESTING:
Type of Toxicity Test:
Existing Limit:
Recommended Limit:
Monitoring Schedule:
Chronic P/F
001: Chronic P/F @ 90%
001: Chronic P/F @ 90%
January, April, July, and October
The facility has passed 17 WET tests during the past five years with one failure in
2008. All subsequent tests passed.
COMPLIANCE SUMMARY:
DMRs have been reviewed for the period January 2008 through December 2011. The
facility received two Notice's of Violation (NOV's) pertaining to that time period. One
was for a Total Residual Chlorine daily maximum exceedance in Jan. 2009 and the
other was for a mercury exceedance in May 2009. No additional NOV's have been
issued to the WWTP since 2009.
A compliance evaluation inspection was conducted on July 20, 2010 and found the
facility satisfactory and compliant.
Page 2
Version: August 28, 2012

NPDES PERMIT FACT SHEET City of Greensboro- North Buffalo WWTP
Page 3 NPDES No. NC0024325
INSTREAM MONITORING:
Instream monitoring is required for temperature, dissolved oxygen, fecal coliform, and
conductivity. The facility is a member of the Upper Cape Fear Monitoring Coalition,
and all their instream monitoring is conditionally waived for the duration of their
membership in the Coalition.
NUTRIENTS:
The permit for this facility was modified and re -issued on Nov. 5, 2010 to reflect the
Jordan Lake Nutrient Management Strategy rules consistent with the Director's
October 1, 2009 letter.
PROPOSED CHANGES:
In an effort to reduce costs for Permittees, a reduction in sampling for toxicants
became effective on 7/15/2010. Sampling reductions affected by this change are
noted below along with other proposed permit renewal changes:
• Cr, Ni, Se, Fe and chloride sample results showed no reasonable potential to violate Water
Quality Standards (WQS) and were removed from the permit.
• Mercury sampling results showed reasonable potential to violate WQS. Mercury monitoring
remains in the permit with a daily maximum limit of 36 ng/L and a monthly average limit
of 12 ng/ L. Chronic and acute limits were required by US EPA Region IV. Monitoring was
reduced to quarterly.
• Cu and Zn sampling results showed reasonable potential to violate WQS, however, they are
action level parameters and limits are set in conjuction with toxicity test results. North
Buffalo WWTP is passing its toxicity tests so limits are not necessary. Both parameters
remain in the permit and sampling was reduced from monthly to quarterly.
• The level of detection for CN is 20 ug/L and thic PQL results in a max predicted
concentration greater than the standard, therefore, limits will remain in the permit.
Snmpling-fer N wasr reduced to monthly—A11 CN samples reported by the City were less
than 20 ug/L, therefore, the limits for CN were removed and monitoring was reduced to
quarterly in accordance with Division guidance. The City should consider using improved
equipment or sampling techniques to achieve a lower PQL (corrected 8-23-2012).
• Fluoride did not show reasonable potential to violate WQS but predicted concentrations
were greater than 50% of the allowable concentration. Since this is not a required
Pretreatment Long Term Monitoring Program parameter it will remain in the permit with a
reduced sampling frequency of quarterly and no limitation.
• A second footnote has been added to Section A. (2.) Combined Limitations for Nutrients-
Outfall C01 to recognize Session Law 2011-394, H.B. 119.
• Section A. (4.) on the Effluent Pollutant Scan now designates the three years in which the
scans are to be performed. Please review.
• Section A. (8.) Nitrogen Optimization Plan was added to confirm that the City of Greensboro
will implement these measures and continue to evaluate its treatment facilities and
operational processes to make reasonable efforts to reduce nitrogen discharges until
process improvements are completed as stated in its nitrogen optimization plan dated
2/11/2010.
PROPOSED SCHEDULE FOR PERMIT ISSUANCE:
Draft Permit to Public Notice: April 25, 2012 (est.)
Permit Scheduled to Issue: June 11, 2012 August 23, 2012 (est.)
STATE CONTACT:
If you have any questions on any of the above information or on the attached permit,
please contact Julie Grzyb at [phone].
Page 3
Version: August 28, 2012

NPDES PERMIT FACT SHEET City of Greensboro- North Buffalo WWTP
Page 4 NPDES No. NC0024325
ADDENDUM TO FACT SHEET: JULY 20, 2012
On July 16, 2012 the NC Governor signed Senate Bill 810 which included the following
clarification on WS-V waters:
SECTION 12.1. Rules adopted by the Environmental Management Commission
pursuant to S.L. 2009-216 and S.L. 2009-486 to implement nutrient management strategies for
the B. Everett Jordan Reservoir and the Falls of the Neuse Reservoir watersheds shall not be
uiteipreted to apply surface water quality standards set out in 15A NCAC 2B .0218(3)(e)
through (3)(h) to waters designated in the nutrient management rules as WS-V except where:
(i) the designation of WS-V is associated with a water supply intake used by an industry to
supply drinking water for their employees; or (ii) standards set out in 15A NCAC 02B
.0218(3)(e) through (3)(h) are violated at the upstream boundary of waters within those
watersheds that are classified as WS-IL WS-III, or WS-IV. This section shall not be construed
to alter the nutrient reduction requirements set out in 15A NCAC 2B .0262(5) or 15A NCAC
2B .0275(3).
Currently, there is no evidence that this discharge will affect the upstream boundary
of Water Supply waters located approximately 65 river miles downstream of this
facility.
PROPOSED SCHEDULE FOR PERMIT ISSUANCE:
Permit Scheduled to Issue: August 10, 2012 (est.)
STATE CONTACT:
If you have any questions on any of the above information or on the attached permit,
please contact Julie Grzyb at [phone].
NAME: l,G d DATE: 2 — °� ?-- a o l�
AGEN REVIEWS & COMMENTS
NO COMMENTS, PROCEED TO ISSUE. MIKE MICKEY 8-1-2012 RRO/DWQ
OUR REVIEW IS COMPLETE. KARRIE-JO SHELL, US EPA REGION IV 7-2-2012
COMMENT LETTER FROM CITY RECEIVED 8-3-2012 FROM MARTIE GROOME. GENERAL COMMENT ON
MONITORING FREQUENCY REDUCTIONS. NO SPECIFIC COMMENTS RELATING TO PERMIT.
CONCURRENCE FROM LISA EDWARDS, DWR RECEIVED ON 7-20-2012
Page 4
Version: August 28, 2012

North Buffalo
NC0024325
REASONABLE POTENTIAL ANALYSIS
Qw (MGD) = 16.00
1 Q 1 OS (cfs) = 0.76
7Q10S(cfs)= 0.90
7QIOW (cfs)= 2.60
30Q2 (cfs) = 3.20
Avg. Stream Flow, QA (cfs) = 25.00
Receiving Stream: North Buffalo Creek
WWTP/WTP Class: IV
IWC 1 Q 1 OS = 97.03%
IWC ® 7Q10S = 96.50%
IWC Q7Q10W= 90.51%
IWC ® 30Q2 = 88.57%
IWC QA = 49.80%
Stream Class: WS-V, NSW
Ouffall 1
Ow=16MGp
PARAMETER
TYPE
(1)
STANDARDS & CRITERIA (2)
J
a
m
REASONABLE POTENTIAL RESULTS
RECOMMENDED ACTION
NC WQS /
Chronic
Applied
Standard
'/z FAV /
Acute
ri
# Det. Max Pred Allowable Cw
Cw •
Arsenic
Arsenic
C
C
50
10
FW(7Q10s)
HH/WS(Qavg)
ug/L
ug/L
12
12
0
0
5.0
5.0
Acute: NO WQS
Chronic: 51.8
No o value > Allowable Cw_
Chronic---- 20.1---
No value > Allowable Cw
all values less than detect
----�—-----_----- —�---
Beryllium
NC
6.5
FW(7Q10s)
ug/L
12
0
2.5
Acute: NO WQS
Chronic: 6.7
No value > Allowable Cw
all values less than detect
_ — — — - —_ —
Cadmium
NC
2
FW(7Q10s)
15
ug/L
88
0
1.0
Acute: 15.5
Chronic: 2.1
No value > Allowable Cw
all values less than detect
——�—�--- �— — --- — - —_
Chromium
•
NC
50
FW(7Q10s)
1022
ug/L
104
1
5.7
Acute: 1,053.3
_--_- --
Chronic: 51.8
No value > Allowable Cw
No --- ___
remove from permit
Copper (AL)
NC
7
FW(7Q10s)
7
ug/L
95
26
19
Acute: 7.5
_
Chronic: 7
23 value(s) > Allowable Cw
RR for AL(Cu,Zn,Ag,Fe,CI) -. apply. Quarterly
Monitoring iris onjUnotion with TOX Test
remains in permit reduce sampling to Quarterly
Cyanide
NC
5
FW(7Q10s)
22
10
ug/L
102
0
10.0
Acute: 22.7
_ __ _____ ____
Chronic: 5.2
102 value(s) > Allowable Cw
all values less than detect (PQL =20 ug/L)
_ __ ___ ________________
remains In permit reduce sampling to Monthly
Fluoride
NC
1800
FW(7Q10s)
ug/L
103
98
1,310.0
Acute: NO WQS
Chronic: 1,865.3
No value > Allowable Cw
No RP , Predicted Maio a 50°%`of Allowable Cw -
apply Quarterly Monitoring
remains •
in permit reduce sampling to Quarterly
Lead
NC
25
FW(7Q10s)
33.8
ug/L
82
0
14.5
Acute: 34.8
Chronic: 25.9_
No value > Allowable Cw
all values less than detect
--- — — —�— — — —
Mercury
NC
12
FW(7Q10s) .
0.5
ng/L
104
93
13.8
Acute: NO WQS
_ _ ______ __—_
Chronic: 12.4
No value > Allowable Cw
RP for non AL - apply Quarterly Monitoring with Limit
_ reduce sampiin_ _
remains in permit gto Quarterly at low•
level Hg testing
Page 1 of 2
NC0024325-N Buffalo RPA 2012 version-2.xlsm. rpa
4/23/2012

North Buffalo
NC0024325
REASONABLE POTENTIAL ANALYSIS
Outfall 1
w = 16 MGD
Nickel
NC
25
WS(7Q10s)
261
ug/L
102
3
13.4
Acute: 269.0
Chronic---- 25.9---
No value > Allowable Cw
No RP
remove from permit —---------_---
,
Selenium
NC
_
5
FW(7Q10s)
56
ug/L
12
0
5.0
Acute: 57.7
Chronic: 5.2
No value > Allowable Cw
ah.values less than► detect
remove from permit -- ----- '— — -
Zinc (AL)
NC
50
FW(7Q I0s)
67
ug/L
96
96
87.8
Acute: 69.1
Chronic: 51.8
17 value(s) > Allowable Cw
RP,far AL(Cu,Zn,Ag,Fe;Clj apply Quarterly
Monitoring, in conjunction with TOX Test
remains in'permit reduce sampling to Quarterly
Iron
NC
1000
FW(7Q10s)
ug/L
92
92
404.3
Acute: NO WQS
_ _ _ _ _
Chronic---- 1036 --
No value > Allowable Cw
No RP, remove from permit
— —----------------------•
Chlorides
NC
250
WS(7Q10s)
mg/L
12
12
185.7
Acute: NO WQS
Chronic: ---- 259 ---
No value > Allowable Cw
No RP , action level standard, remove from permit
— — — -- — —-----------.
NC0024325-N Buffalo RPA 2012 version-2.xlsm, rpa
Page 2 of 2 4/23/2012

REASONABLE P•TENTIAL ANALYSIS
Arsenic - FW Standard
Date Data BDL=1/2DL Results
1 6/1/2011 < 10 5 Std Dev. 0.0000
2 2/1/2011 < 10 5 Mean 5.0000
3 12/1/2010 < 10 5 C.V. 0.0000
4 9/1/2010 < 10 5 n 12
5 6/1/2010 < 10 5
6 3/1/2010 < 10 5 Mult Factor 1.00
7 12/1/2009 < 10 5 Max. Value 5.0 ug/L
8 9/1/2009 < 10 5 Max. Pred Cw 5.0 ug/L
9 6/1/2009 < 10 5
10 91/2011 < 10 5
11 3/1/2009 < 10 5
12 12/1/2008 < 10 5
Beryllium
13
14
15
16
USE ONLY
"PASTE
SPECIAL -
Values" WITH
_ "COPY"
Date Data BDL=1/2DL Results
U E.`
"PASTE
SPECIAL -
Values" WITH
"COPY"
1 6/1/2011 < 5 2.5 Std Dev. 0.0000
2 2/1/2011 < 5 2.5 Mean 2.5000
3 12/1/2010 < 5 2.5 C.V. 0.0000
4 9/1/2010 < 5 2.5 n 12
5 6/1/2010 < 5 2.5
6 3/1/2010 < 5 2.5 Mult Factor = 1.00
7 12/1/2009 < 5 2.5 Max. Value 2.5 ug/L
8 9/1/2009 < 5 2.5 Max. Pred Cw 2.5 ug/L
9 6/1/2009 < 5 2.5
10 91/2011 < 5 2.5
11 3/1/2009 < 5 2.5
12 12/1/2008 `<- 5 2.5
13
14
15
16
NC0024325-N Buffalo RPA 2012 version-2.xlsm, data
- 1 - 2/27/2012

REASONABLE POTENTIAL ANALYSIS
4
Cadmium
Date Data BDL=1/2DL Results
1 6/1/2011 Std Dev.
2 Mean
3 C.V.
4 n
5
6 5/1/2011 < 2.00 1 Mult Factor =
7 < 2.00 1 Max. Value
8 < 2.00 1 Max. Pred Cw
9 < 2.00 1
10
11 4/1/2011 < 2.00 1
12 < 2.00 1
13 < 2.00 1
14 < 2.00 1
15
16 3/1/2011 < 2.00 1
17 < 2.00 1
18 < 2.00 1
19 < 2.00 1
20
21 2/1/2011 < 2.00 1
22 < 2.00 1
23
24
25
26 1/1/2011 < 2.00 1
27 , < 2.00 1
28 < 2.00 1
29 < 2.00 1
30
31 12/1/2010
32
33
34
35
36 11/1/2010
37
38
39
40
41 10/1/2010 < 2.00 1
42 < 2.00 1
43 < 2.00 1
44 < 2.00 1
45
46 9/1/2010 < 2.00 1
47 < 2.00 1
48 < 2.00 1
49 < 2.00 1
50 < 2.00 1
51 8/1/2010 < 2.00 1
52 < 2.00 1
53 < 2.00 1
54 < 2.00 1
55
56 7/1/2010 < 2.00
57 < 2.00
58
59
60
61 6/1/2010 < 2.00
62 < 2.00
63 < 2.00
64 < 2.00
65 < 2.00
66 5/1/2010 < 2.00
67 < 2.00
USE ONLY
"PASTE
SPECIAL -
Values" WITH
_ "COPY" _
0.0000
1.0000
0.0000
88
1.00
1.0 ug/L
1.0 ug/L
8
Chromium
Date Data BDL=1/2DL Results
1 6/1/2011 < 5.00 2.5 Std Dev, 1.0076
2 < 5.00 2.5 Mean 4.5437
3 < 5.00 2.5 C.V. 0.2218
4 < 5.00 2.5 n 104
5 < 5.00 2.5
6 5/1/2011 < 10.00 5 Mult Factor = 1.14
7 < 10.00 5 Max. Value 5.0 ug/L
8 < 10.00 5 Max. Pred Cw 5.7 ug/L
9 < 10.00 5
10
11 4/1/2011 < 10.00 5
12 < 10.00 5
13 < 10.00 5
14 . < 10.00 5
15
16 3/1/2011 < 10.00 5
17 < 10.00 5
18 < 10.00 5
19 < 10.00 5
20
21 2/1/2011 < 10.00 5
22 < 10.00 5
23 < 10.00 5
24 < 10.00 5
25
26 1/1/2011 ' < 10.00 5
27 < 10.00 5
28 `< 10.00 5
29 < 10.00 5
30
31 12/1/2010 <• 5.00 2.5
32 < 5.00 2.5
33 < 5.00 2.5
34 -< 5.00 2.5
35 -< 5.00 2.5
36 11/1/2010 < 10.00 5
37 < 2.00 1
38 2.00 2
39 < 5.00 2.5
40
41 10/1/2010 < 10.00 5
42 ` < 10.00 5
43 .< 10.00 5
44 < 10.00 5
45
46 9/1/2010 < 5.00 2.5
47 < 5.00 2.5
48 < 5.00 2.5
49 < 5.00 2.5
50 < 5.00 2.5
51 8/1/2010 < 10.00 5
52 < 10.00 5
53 < 10.00 5
54 < 10.00 5
55
56 7/1/2010 < 10.00 5
57 < 10.00 5
58
59
60
61 6/1/2010 < 10.00
62 < 10.00 5
63 < 10.00 5
64 < 10.00 5
65 < 10.00 5
66 5/1/2010 < 10.00 5
67 < 10.00 5
NC0024325-N Buffalo RPA 2012 version-2.xlsm, data
- 1 - 2/27/2012
USE ONLY
"PASTE
SPECIAL -
Values" WITH
__ _ "COPY_"

REASONABLE POTENTIAL AKIALYS S
68 < 2.00
69 < 2.00
70
71 4/1/2010 < 2.00
72 < 2.00
73 < 2.00
74 < 2.00
75
76 3/1/2010 < 2.00
77 < 2.00
78 < 2.00
79 < 2.00
80
81 2/1/2010 < 2.00
82 < 2.00
83 < 2.00
84 < 2.00
85
86 1/1/2010 < 2.00
87 < 2.00
88 < 2.00
89 < 2.00
90
91 12/1/2009 < 2.00
92 < 2.00
93 < 2.00
94 < 2.00
95
96 11/1/2009 < 2.00 1
97 < 2.00 1
98 < 2.00 1
99 < 2.00 1
100
101 10/1/2009 < 2.00 1
102 < 2.00 1
103 < 2.00 1
104 < 2.00 1
105
106 9/1/2009 < 2.00 1
107 < 2.00 1
108 < 2.00 1
109 <, 2.00 1
110 < 2.00 1
111 8/1/2009 < 2.00 1
112 .< 2.00 1
113 < 2.00 1
114 < 2.00 1
115
116 7/1/2009 < 2.00 1
117 < 2.00 1
118 < 2.00 1
119 < 2.00 1
120 < 2.00 1
121 6/1/2009 < 2.00 1
122 < 2.00 1
123 < 2.00 1
124 < 2.00 1
125
68 < 10.00 5
69 < 10.00 5
70
71 4/1/2010 < 10.00 5
72 < 10.00 5
73 < 10.00 5
74 < 10.00 5
75
76 3/1/2010 < 10.00 5
77 < 10.00 5
78 < 10.00 5
79 < 10.00 5
80
81 2/1/2010 < 10.00 5
82 <' 10.00 5
83 < 10.00 5
84 < 10.00 5
85
86 1/1/2010 < 10.00 5
87 ‘< 10.00 5
88 < 10.00 5
89 < 10.00 5
90
91 12/1/2009 < 10.00 5
92 < 10.00 5
93 10.00 5
94 10.00 5
95
96 11/1/2009 -< 10.00 5
97 < 10.00 5
98 < 10.00 5
99 < 10.00 5
100
101 10/1/2009 < 10.00 5
102 < 10.00 5
103 < 10.00 5
104 < 10.00 5
105
106 9/1/2009 < 10.00 5
107 < 10.00 5
108 < 10.00 5
109 < 10.00 5
110 <. 10.00 5
111 8/1/2009 < 10.00 5
112 < 10.00 5
113 < 10.00 5
114 < 10.00 5
115
116 7/1/2009 < 10.00 5
117 < 10.00 5
118 < 10.00 5
119 < 10.00 5
120 < 10.00 5
121 6/1/2009 < 10.00 5
122 < 10.00 5
123 < 10.00 5
124 < 10.00 5
125
NC0024325-N Buffalo RPA 2012 version-2.xlsm, data
- 2 - 2/27/2012

REASON ABLE POTENTIAL ANALYSIS
S
9
Copper (AL)
1
2
3
4
5
6 5/1/2011 12.00
7 < 10.00
8 < 10.00
9 < 10.00
10
11 4/1/2011 < 10.00
12 < 10.00
13 < 10.00
14 < 10.00
15
16 3/1/2011 12.00
17 10.00
18 < 10.00
19 11.00
20
21 2/1/2011 < 10.00
22 < 10.00
23 9.00
24
25
26 1/1/2011 < 10.00
27 < 10.00
28 < 10.00
29 11.00
30
31 12/1/2010 9.00
32 5.00
33
34
35
36 11/1/2010 15.00
37 7.00
38
39
40
41 10/1/2010 10.00
42 < 10.00
43 < 10.00
44 < 10.00
45
46 9/1/2010 6.00
47 8.00
48 10.00
49 12.00
50 9.00
51 8/1/2010 11.00
52 11.00
53 10.00
54 11.00
55
56 7/1/2010 < 10.00
57 10.00
58
59
60
61 6/1/2010 < 10.00
62 < 10.00
63 < 10.00
64 < 10.00
65 < 10.00
66 5/1/2010 < 10.00
67 < 10.00
Date Data BDL=1/2DL
6/1/2011 8.00 8
8.00 8
12
5
5
5
5
5
5
5
12
10
5
11
5
5
9
5
5
5
11
9
5
15
7
10
5
5
5
6
8
10
12
9
11
11
10
11
5
10
5
5
5
5
5
5
5
Results
Std Dev.
Mean
C.V.
n
Mult Factor =
Max. Value
Max. Pred Cw
USE ONLY `.
"PASTE.
SPECIAL -
Values" WITH
"COPY." ._
10
Cyanide
2.4068
6.3158
0.3811
95
1.27
15.0 ug/L
19.1 ug/L
Date Data BDL=1/2DL
1 6/1/2011 < 20.00 10
2 < 20.00 10
3 < 20.00 10
4 < 20.00 10
5
6 5/1/2011 < 20.00 10
7 < 20.00 10
8 < 20.00 10
9 < 20.00 10
10
11 4/1/2011 < 20.00 10
12 < 20.00 10
13 < 20.00 10
14 < 20.00 10
15
16 3/1/2011 < 20.00 10
17 < 20.00 10
18 . < 20.00 10
19 < 20.00 10
20
21 2/1/2011 < 20.00 10
22 < 20.00 10
23 , < 20.00 10
24 < 20.00 10
25
26 1/1/2011 < 20.00 10
27 < 20.00 10
28 .< 20.00 10
29 < 20.00 10
30
31 12/1/2010 < 20.00 10
32 < 20.00 10
33 < 20.00 10
34 < 20.00 10
35
36 11/1/2010 : < 20.00 10
37 < 20.00 10
38 < 20.00 10
39 < 20.00 10
40
41 10/1/2010 < 20.00 10
42 < 20.00 10
43 < 20.00 10
44 < 20.00 10
45
46 9/1/2010 < 20.00 10
47 < 20.00 10
48 < 20.00 10
49 < 20.00 10
50
51 8/1/2010 < 20.00 10
52 < 20.00 10
53 < 20.00 10
54 < 20.00 10
55
56 7/1/2010 < 20.00 10
57 < 20.00 10
58 < 20.00 10
59 < 20.00 10
60
61 6/1/2010 < 20.00 10
62 < 20.00 10
63 < 20.00 10
64 < 20.00 10
65
66 5/1/2010 < 20.00
67 < 20.00
NC0024325-N
-1-
Results
Std Dev.
Mean
C.V.
n
Mult Factor =
Max. Value
Max. Pred Cw
.USE ONLY
"PASTE
SPECIAL-
Values" WITH
"COPY"_
0.0000
10.00
0.0000
102
1.00
10.0 ug/L
10.0 ug/L
10
10
Buffalo RPA 2012 version-2.xlsm, data
2/27/2012

REAS
•
NA
LE POTENTIAL ANALYSIS
68 < 10.00 5
69 < 10.00 5
70
71 4/1/2010 < 10.00 5
72 < 10.00 5
73 < 10.00 5
74 < 10.00 5
75
76 3/1/2010 < 10.00 5
77 < 10.00 5
78 < 10.00 5
79 < 10.00 5
80
81 2/1/2010 < 10.00 5
82 < 10.00 5
83 < 10.00 5
84 < 10.00 5
85
86 1/1/2010 < 10.00 5
87 < 10.00 5
88 < 10.00 5
89 < 10.00 5
90
91 12/1/2009 11.00 11
92 < 10.00 5
93 < 10.00 5
94 < 10.00 5
95
96 11/1/2009 < 10.00 5
97 < 10.00 5
98 < 10.00 5
99 <. 10.00 5
100
101 10/1/2009 .< 10.00 5
102 < 10.00 5
103 < 10.00 5
104 < 10.00 5
105
106 9/1/2009 < 10.00 5
107 <. 10.00 5
108 < 10.00 5
109 < 10.00 5
110 < 10.00 5
111 8/1/2009 < 10.00 5
112 10.00 5
113 < 10.00 5
114 < 10.00 5
115
116 7/1/2009 < 10.00 5
117 < 10.00 5
118 < 10.00 5
119 < 10.00 5
120 < 10.00 5
121 6/1/2009 10.00 10
122 < 10.00 5
123 9.00 9
124 < 10.00 5
125
68 < 20.00 10
69 < 20.00 10
70
71 4/1/2010 < 20.00 10
72 < 20.00 10
73 < 20.00 10
74 < 20.00 10
75
76 3/1/2010 < 20.00 10
77 < 20.00 10
78 < 20.00 10
79 < 20.00 10
80
81 2/1/2010 < 20.00 10
82 < 20.00 10
83 < 20.00 10
84 < 20.00 10
85
86 1/1/2010 <, 20.00 10
87 < 20.00 10
88 <- 20.00 10
89 < 20.00 10
90
91 12/1/2009 < 20.00 10
92 < 20.00 10
93 < 20.00 10
94 < 20.00 10
95
96 11/1/2009 < 20.00 10
97 < 20.00 10
98 <. 20.00 10
99 20.00 10
100
101 10/1/2009 <' 20.00 10
102 < 20.00 10
103 < 20.00 10
104 20.00 10
105
106 9/1/2009 < 20.00 10
107 < 20.00 10
108 < 20.00 10
109 < 20.00 10
110 < 20.00 10
111 8/1/2009 < 20.00 10
112 < 20.00 10
113 20.00 10
114 < 20.00 10
115
116 7/1/2009 < 20.00 10
117 < 20.00 10
118 < 20.00 10
119 <' 20.00 10
120 < 20.00 10
121 6/1/2009 < 20.00 10
122 '< 20.00 10
123 < 20.00 10
124 < 20.00 10
125
NC0024325-N Buffalo RPA 2012 version-2.xlsm, data
- 2 - 2/27/2012

REASONABLE P
TENTIAL ANALYSIS
11
Fluoride
Date Data BDL=1/2DL Results
1 6/1/2011 100.00 100 Std Dev.
2 100.00 100 Mean
3 100.00 100 C.V.
4 100.00 100 n
5
6 5/1/2011 200.00 200 Mult Factor =
7 200.00 200 Max. Value
8 200.00 200 Max. Pred Cw
9 100.00 100
10
11 4/1/2011 < 100.00 50
12 < 100.00 50
13 < 100.00 50
14 100.00 100
15
16 3/1/2011 400.00 400
17 100.00 100
18 < 100.00 50
19 200.00 200
20
21 2/1/2011 200.00 200
22 100.00 100
23 100.00 100
24 200.00 200
25
26 1/1/2011 500.00 500
27 100.00 100
28 200.00 200
29 <` 100.00 50
30
31 12/1/2010 500.00 500
32 300.00 300
33 400.00 400
34 300.00 300
35 500.00 500
36 11/1/2010 500.00 500
37 400.00 400
38 600.00 600
39 500.00 500
40
41 10/1/2010 400.00 400
42 300.00 300
43 200.00 200
44 500.00 500
45
46 9/1/2010 500.00 500
47 600.00 600
48 600.00 600
49 700.00 700
50 500.00 500
51 8/1/2010 600.00 600
52 600.00 600
53 600.00 600
54 400.00 400
55
56 7/1/2010 300.00 300
57 400.00 400
58
59
60
61 6/1/2010 500.00 500
62 400.00 400
63 400.00 400
64 500.00 500
65
66 5/1/2010 700.00 700
67 200.00 200
USE ONL
"PASTE
SPECIAL -
Values" WITH
„COPY
12
Lead
180.7337
389.8058
0.4637
103
1.31
1000.0 uglL
1310.0 ug/L
USE ONLY
"PASTE
SPECIAL -
Values" WITH
"COPY"
Date Data BDL=1/2DL Results
1 6/1/2011 Std Dev. 2.3588
2 Mean 11.6768
3 C.V. 0.2020
4 n 82
5
6 5/1/2011 < 25.00 12.5 Mult Factor = 1.16
7 < 25.00 12.5 Max. Value 12.5 ug/L
8 < 25.00 12.5 Max. Pred Cw 14.5 ug/L
9 < 25.00 12.5
10
11 4/1/2011 < 10.00 5
12 -< 10.00 5
13 ,.< 10.00 5
14 ;<, 10.00 5
15
16 3/1/2011 [.< 25.00 12.5
17 < 25.00 12.5
18
is
19
20
21 2/1/2011 <'. 25.00 12.5
22 < 25.00 12.5
23
24
25
26 1/1/2011 < 25.00 12.5
27 <:. 25.00 12.5
28
29
30
31 12/1/2010
32
33
34
35
36 11/1/2010
37
38
39
40
41 10/1/2010 <' 25.00 12.5
42 < 25.00 12.5
43 < 25.00 12.5
44 < 25.00 12.5
45
46 9/1/2010 < 10.00 5
47 < 10.00 5
48 < 10.00 5
49 < 10.00 5
50
51 8/1/2010 < 25.00 12.5
52 < 25.00 12.5
53 < 25.00 12.5
54 < 10.00 5
55
56 7/1/2010 < 25.00 12.5
57 < 25.00 12.5
58
59
60
61 6/1/2010 < 25.00 12.5
62 < 25.00 12.5
63 < 25.00 12.5
64 < 25.00 12.5
65
66 5/1/2010 < 25.00 12.5
67 < 25.00 12.5
NC0024325-N Buffalo RPA 2012 version-2.xlsm, data
- 1 - 2/27/2012

REASONABLE POTEN` I L ANALYSIS
68 400.00 400
69 400.00 400
70
71 4/1/2010 . 400.00 400
72 400.00 400
73 400.00 400
74 600.00 600
75
76 3/1/2010 400.00 400
77 400.00 400
78 400.00 400
79 400.00 400
80
81 2/1/2010 400.00 400
82 300.00 300
83 400.00 400
84 400.00 400
85
86 1/1/2010 400.00 400
87 400.00 400
88 500.00 500
89 300.00 300
90
91 12/1/2009 300.00 300
92 400.00 400
93 400.00 400
94 400.00 400
95 300.00 300
96 11/1/2009 500.00 500
97 500.00 500
98 400.00 400
99 .300.00 300
100 •
101 10/1/2009 600.00 600
102 600.00 600
103 600.00 600
104 500.00 . 500
105
106 9/1/2009 - #/#/## 1000
107 600.00 600
108 500.00 500
109 400.00 400
110 600.00 600
111 8/1/2009 500.00 500
112 600.00 600
113 500.00 500
114 600.00 600
115
116 7/1/2009 500.00 500
117 400.00 400
118 500.00 500
119 600.00 600
120 600.00 600
121 6/1/2009 400.00 400
122 400.00 400
123 400.00 400
124 500.00 500
125
68 < 25.00 12.5
69 < 25.00 12.5
70
71 4/1/2010 < 25.00 12.5
72 < 25.00 12.5
73 < 25.00 12.5
74 < 25.00 12.5
75
76 3/1/2010 < 25.00 12.5
77 < 25.00 12.5
78 < 25.00 12.5
79 < 25.00 12.5
80
81 2/1/2010 < 25.00 12.5
82 <. 25.00 12.5
83 < 25.00 12.5
84 < 25.00 12.5
85
86 1/1/2010 < 25.00 12.5
87 < 25.00 12.5
88 < 25.00 12.5
89 <, 25.00 12.5
90
91 12/1/2009 < 25.00 12.5
92 < 25.00 12.5
93 < 25.00 12.5
94 < 25.00 12.5
95
96 11/1/2009 < 25.00 12.5
97 < 25.00 12.5
98 < 25.00 12.5
99 < 25.00 12.5
100
101 10/1/2009 -< 25.00 12.5
102 < 25.00 12.5
103 < 25.00 12.5
104 < 25.00 12.5
105
106 9/1/2009 < 25.00 12.5
107 < 25.00 12.5
108 • < 25.00 12.5
109 < 25.00 12.5
110 < 25.00 12.5
111 8/1/2009 < 25.00 12.5
112 < 25.00 12.5
113 .< 25.00 12.5
114 < 25.00 12.5
115
116 7/1/2009 <. 25.00 12.5
117 < 25.00 12.5
118 < 25.00 12.5
119 < 25.00 12.5
120 < 25.00 12.5
121 6/1/2009 < 25.00 12.5
122 < 25.00 12.5
123 < 25.00 12.5
124 < 25.00 12.5
125
NC0024325-N Buffalo RPA 2012 version-2.xlsm, data
- 2 - 2/27/2012

REASONA
f�3
LE POTENT1 L ANALYSIS
13
Mercury
SE ONLY
"PASTE
SPECIAL -
Values" WITH
"COPY"..
15
Nickel
Date Data BDL=1/2DL Results
1 6/1/2011 1.30 1.3 Std Dev. 1.5258
2 < 1.00 0.5 Mean 2.2933
3 1.50 1.5 C.V. 0.6653
4 2.00 2 n 104
5 1.50 1.5
6 5/1/2011 8.30 8.3 Mult Factor = 1.45
7 5.10 5.1 Max. Value 9.5 ng/L
8 3.30 3.3 Max. Pred Cw 13.8 ng/L
9 2.20 2.2
10
11 4/1/2011 < 1.00 0.5
12 2.20 2.2
13 3.60 3.6
14 4.30 4.3
15
16 3/1/2011 1.90 1.9
17 < 1.00 0.5
18 2.80 2.8
19 < 1.00 0.5
20
21 2/1/2011 2.10 2.1
22 1.40 1.4
23 1.50 1.5
24 1.30 1.3
25
26 1/1/2011 2.10 2.1
27 1.20 1.2
28 3.50 3.5
29 < 1.00 0.5
30
31 12/1/2010 3.60 3.6
32 2.90 2.9
33 1.00 1
34 < 1.00 0.5
35
36 11/1/2010 1.10 1.1
37 3.70 3.7
38 3.60 3.6
39 3.80 3.8
40
41 10/1/2010 1.60 1.6
42 < 1.00 0.5
43 1.90 1.9
44 2.60 2.6
45 9.50 9.5
46 9/1/2010 < 1.00 0.5
47 1.20 1.2
48 3.10 3.1
49
50
51 8/1/2010 1.20 1.2
52 3.50 3.5
53 3.00 3
54 2.30 2.3
55
56 7/1/2010 1.30 1.3
57 1.60 1.6
58
59
60
61 6/1/2010 2.70 2.7
62 1.90 1.9
63 2.00 2
64 1.10 1.1
65 < 1.00 0.5
66 5/1/2010 3.00 3
67 2.30 2.3
USE ONLY
"PASTE
SPECIAL -
Values" WITH
"COPY."
Date Data BDL=1/2DL Results
1 6/1/2011 < 10.00 5 Std Dev. 0.9758
2 < 10.00 5 Mean 5.1667
3 < 10.00 5 C.V. 0.1889
4 < 10.00 5 n 102
5
6 5/1/2011 < 10.00 5 Mult Factor = 1.12
7 < 10.00 5 Max. Value 12.0 ug/L
8 < 10.00 5 Max. Pred Cw 13.4 ug/L
9 < 10.00 5
10
11 4/1/2011 < 10.00 5
12 < 10.00 5
13 < 10.00 5
14 < 10.00 5
15
16 3/1/2011 < 10.00 5
17 .< 10.00 5
18 '< 10.00 5
19 10.00 5
20
21 2/1/2011 < 10.00 5
22 --< 10.00 5
23 ''< 10.00 5
24 <;, 10.00 5
25
26 1/1/2011 10.00 5
27 < 10.00 5
28 <, 10.00 5
29 < 10.00 5
30
31 12/1/2010 < 10.00 5
32 < 10.00 5
33 .< 10.00 5
34 < 10.00 5
35
36 11/1/2010 < 10.00 5
37 < 10.00 5
38 < 10.00 5
39 < 10.00 5
40
41 10/1/2010 < 10.00 5
42 .< 10.00 5
43 < 10.00 5
44 < 10.00 5
45
46 9/1/2010 < 10.00 5
47 < 10.00 5
48 < 10.00 5
49 < 10.00 5
50
51 8/1/2010 < 10.00 5
52 < 10.00 5
53 < 10.00 5
54 < 10.00 5
55
56 7/1/2010 < 10.00 5
57 < 10.00 5
58 < 10.00 5
59 < 10.00 5
60
61 6/1/2010 < 10.00 5
62 < 10.00 5
63 < 10.00 5
64 < 10.00 5
65 5/1/2010 < 10.00 5
66 < 10.00 5
67 < 10.00 5
NC0024325-N Buffalo RPA 2012 version-2.xlsm, data
- 1 - 2/27/2012

REASONABLE POTE T DAL ANALYSIS
PSIS
68 1.80 1.8
69 7.10 7.1
70 2.00 2
71 4/1/2010 2.00 2
72 1.60 1.6
73 6.30 6.3
74 2.90 2.9
75
76 3/1/2010 4.90 4.9
77 2.20 2.2
78 1.30 1.3
79 2.30 2.3
80
81 2/1/2010 2.10 2.1
82 1.10 1.1
83 3.40 3.4
84 1.50 1.5
85
86 1/1/2010 1.70 1.7
87 2.60 2.6
88 1.40 1.4
89 2.20 2.2
90
91 12/1/2009 ,1.30 1.3
92 1.90 1.9
93 1.10 1.1
94 < 1.00 0.5
95 1.60 1.6
96 11/1/2009 3.00 3
97 3.10 3.1
98 1.10 1.1
99 1.10 1.1
100
101 10/1/2009 3.60 3.6
102 1.40 1.4
103 2.40 2.4
104 3.40 3.4
105
106 9/1/2009 2.50 2.5
107 2.60 2.6
108 1.30 1.3
109 1.10 1.1
110 < 1.00 0.5
111 8/1/2009 2.40 2.4
112 3.70 3.7
113 2.30 2.3
114 1.90 1.9
115
116 7/1/2009 1.30 1.3
117 1.50 1.5
118 1.80 1.8
119 2.00 2
120
121 6/1/2009 2.90 2.9
122 2.10 2.1
123 3.30 3.3
124 2.90 2.9
125 3.4 3.4
126
127
68 < 10.00 5
69
70 4/1/2010 < 10.00 5
71 < 10.00 5
72 < 10.00 5
73 < 10.00 5
74
75 3/1/2010 12.00 12
76 < 10.00 5
77 < 10.00 5
78 < 10.00 5
79
80 2/1/2010 < 10.00 5
81 < 10.00 5
82 < 10.00 5
83 < 10.00 5
84
85 1/1/2010 < 10.00 5
86 < 10.00 5
87 < 10.00 5
88 < 10.00 5
89
90 12/1/2009 < 10.00 5
91 < 10.00 5
92 < 10.00 5
93 < 10.00 5
94
95 11/1/2009 < 10.00 5
96 < 10.00 5
97 < 10.00 5
98 < 10.00 5
99
100 10/1/2009 < 10.00 5
101 < 10.00 5
102 < 10.00 5
103 <. 10.00 5
104
105 9/1/2009 < 10.00 5
106 < 10.00 5
107 < 10.00 5
108 < 10.00 5
109 < 10.00 5
110 8/1/2009 10.00 10
111 <, 10.00 5
112 < 10.00 5
113 10.00 10
114
115 7/1/2009 < 10.00 5
116 < 10.00 5
117 :< 10.00 5
118 < 10.00 5
119 , < 10.00 5
120 6/1/2009 < 10.00 5
121 < 10.00 5
122 < 10.00 5
123 < 10.00 5
124
125
126
127
NC0024325-N Buffalo RPA 2012 version-2.xlsm, data
- 2 - 2/27/2012

REAS
•
NA
LE POTENTAAL ANALYSOS
16
Selenium
Date Data BDL=1/2DL Results
1 6/1/2011 < 10 5 Std Dev.
2 2/1/2011 < 10 5 Mean
3 12/1/2010 < 10 5 C.V.
4 9/1/2010 < 10 5 n
5 6/1/2010 < 10 5
6 3/1/2010 < 10 5 Mult Factor =
7 12/1/2009 < 10 5 Max. Value
8 9/1/2009 < 10 5 Max. Pred Cw
9 6/1/2009 < 10 5
10 91/2011 < 10 5
11 3/1/2009 < 10 5
12 12/1/2008 < 10 5
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
USE ONLY
"PASTE
SPECIAL -
Values" WITH
"COPY"
0.0000
5.0000
0.0000
12
1.00
5.0 ug/L
5.0 ug/L
1 6/1/2011
2
3
4
5
18
Zinc (AL)
Date Data
31.00
36.00
BDL=1/2DL
31
36
Results
Std Dev. 9.0927
Mean 44.7813
C.V. 0.2030
n 96
USE ONLY
"PASTE
SPECIAL -
Values" WITH
"COPY"
6 5/1/2011 66.00 66 Mult Factor = 1.14
7 57.00 57 Max. Value 77.0 ug/L
8 62.00 62 Max. Pred Cw 87.8 ug/L
9 62.00 62
10
11 4/1/2011 49.00 49
12 45.00 45
13 49.00 49
14 42.00 42
15
16 3/1/2011 52.00 52
17 49.00 49
18 43.00 43
19 44.00 44
20
21 2/1/2011 48.00 48
22 40.00 40
23 41.00 41
24
25
26 1/1/2011 56.00 56
27 51.00 51
28 48.00 48
29 50.00 50
30
31 12/1/2010 77.00 77
32 47.00 47
33
34
35
36 11/1/2010 64.00 64
37 51.00 51
38
39
40
41 10/1/2010 39.00 39
42 36.00 36
43 46.00 46
44 43.00 43
45
46 9/1/2010 36.00 36
47 26.00 26
48 30.00 30
49 32.00 32
50 24.00 24
51 8/1/2010 39.00 39
52 36.00 36
53 39.00 39
54 40.00 40
55
56 7/1/2010 27.00 27
57 34.00 34
58
59
60
61 6/1/2010 37.00 37
62 42.00 42
63 31.00 31
64 39.00 39
65 37.00 37
66 5/1/2010 61.00 61
67 44.00 44
NC0024325-N Buffalo RPA 2012 version-2.xlsm, data
- 1 - 2/27/2012

REASON
LE POTENTIAL
NALYSIIS
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
68 47.00 47
69 55.00 55
70
71 4/1/2010 50.00 50
72 55.00 55
73 57.00 57
74 49.00 49
75
76 3/1/2010 46.00 46
77 52.00 52
78 49.00 49
79 51.00 51
80
81 2/1/2010 42.00 42
82 40.00 40
83 47.00 47
84 46.00 46
85
86 1/1/2010 48.00 48
87 53.00 53
88 54.00 54
89 40.00 40
90
91 12/1/2009 . 50.00 50
92 49.00 49
93 46.00 46
94 36.00 36
95 44.00 44
96 11/1/2009 42.00 42
97 50.00 50
98 49.00 49
99 35.00 35
100
101 10/1/2009 38.00 38
102 47.00 47
103 59.00 59
104 49.00 49
105
106 9/1/2009 41.00 41
107 39.00 39
108 44.00 44
109 41.00 41
110 35.00 35
111 8/1/2009 46.00 46
112 42.00 42
113 38.00 38
114 39.00 39
115
116 7/1/2009 36.00 36
117 38.00 38
118 34.00 34
119 38.00 38
120 43.00 43
121 6/1/2009 58.00 58
122 47.00 47
123 43.00 43
124 44.00 44
125
NC0024325-N Buffalo RPA 2012 version-2.xlsm, data
- 2 - 2/27/2012

1 6/1/2011
2
3
4
5
1.1
EASONABLE POTENTIAL ANALYSIS
19
Iron
Date Data BDL=1/2DL
93 93
91 91
6 5/1/2011 293 293
7 233 233
8 100 100
9 122 122
10
11 4/1/2011 66 66
12 113 113
13 97 97
14 183 183
15
16 3/1/2011 88 88
17 75 75
18
19
20
21 2/1/2011 79 79
22 58 58
23 56 56
24 100 100
25
26 1/1/2011 92 92
27 62 62
28 64 64
29 86 86
30
31 12/1/2010 247 247
32
33
34
35
36 11/1/2010 130 130
37
38
39
40
41 10/1/2010 81 81
42 103 103
43 240 240
44 190 190
45
46 9/1/2010 81 81
47 57 57
48 68 68
49 105 105
50 51 51
51 8/1/2010 69 69
52 118 118
53 132 132
54 100 100
55
56 7/1/2010 149 149
57 106 106
58
59
60
61 6/1/2010 82 82
62 117 117
63 104 104
64 101 101
65
66 5/1/2010 147 147
67 103 103
Results
Std Dev.
Mean
C.V.
n
USE ONLY
"PASTE
SPECIAL -
Values" WITH
"COPY."
20
Chlorides
47.2445
92.6739
0.5098
92
Mult Factor = 1.38
Max. Value 293.000000 ug/L
Max. Pred Cw 404.340000 ug/L
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58.
59
60
61
62
63
64
65
66
67
Date Data
9/1/2011
6/1/2011
3/1/2011
12/1/2010
9/1/2010
6/1/2010
3/1/2010
9/1/2009
6/1/2009
3/1/2009
12/1/2008
5/1/2008
48
86
88
44
38
43
52
53
63
45
39
9
BDL=1/2DL
48
86
88
44
38
43
52
53
63
45
39
9
Results
Std Dev.
Mean
C.V.
n
Mult Factor =
Max. Value
Max. Pred Cw
USE ONLY
"PASTE
SPECIAL -
Values" WITH
"COPY"
21.2703
50.6667
0.4198
12
2.11
88.000000 mg/L
185.680000 mg/L
NC0024325-N Buffalo RPA 2012 version-2.xlsm, data
- 1 - 2/27/2012

REAS
�l
NABLE POTENTB L ANALYSES
68 87 87
69 110 110
70
71 4/1/2010 99 99
72 125 125
73 150 150
74 163 163
75
76 3/1/2010 177 177
77 61 61
78 74 74
79 67 67
80
81 2/1/2010 113 113
82 91 91
83 77 77
84 73 73
85
86 1/1/2010 77 77.
87 67 67
88 68 68
89 96 96
90
91 12/1/2009 52 52
92 49 49
93 45 45
94 60 60
95 55 55
96 .11/1/2009 71 71
97 66 66
98 54 54
99 48 48
100
101 10/1/2009 50 50
102 70 70
103 103 103
104 70 70
105
106 9/1/2009 49 49
107 41 41
108 48 48
109 45 45
110 50 50
111 8/1/2009 71 71
112 56 56
113 70 70
114 57 57
115
116 7/1/2009 76 76
117 55 55
118 55 55
119 54 54
120 67 67
121 6/1/2009 73 73
122 79 79
123 84 84
124 96 96
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
NC0024325-N Buffalo RPA 2012 version-2.xlsm, data
- 2 - 2/27/2012

j
NPDES/Aquifer Protection Permitting Unit Pretreatment Information Request Form
PERMIT WRITER COMPLETES THIS PART:
PERMIT WRITERS - AFTER you get this form back
Check all that
from PERCS:
•
apply
Notify PERCS if LTMP/STMP data be
Date of Request
1/19/2012
municipal renewal
y
- we said should
on DMRs is not really there, so we can get it for you
Requestor
Julie Grzyb
new industries
(or NOV POTW).
Facility Name
North Buffalo
WWTP expansion
- Notify PERCS if you want us to keep a specific POC
Permit Number
NC0024325
Speculative limits
in LTMP/STMP so you will have data for next permit
Region
WSRO
stream reclass.
renewal.
- Email PERCS draft permit, fact sheet, RPA.
Basin
Cape Fear
outfall relocation
- Send PERCS paper copy of permit (w/o NPDES
7Q10 change
boilerplate), cover letter, final fact sheet. Email RPA if
other
changes.
other
check
applicable PERCS staff:
Other Comments to
PERCS:
v
BRD, CPF, CTB, FRB, TAR - Sarah Morrison (807-6310)
CHO, HIW, LUM, LTN, NES, NEW, ROA, YAD - Monti
Hassan (807-6314)
5 SIU's listed in permit application:
1 non -categorical and 4CIU's
PERCS
Status
PRETREATMENT STAFF COMPLETES THIS PART:
of Pretreatment Program (check all that apply)
1) facility has no SIU's, does have Division approved Pretreatment Program that is INACTIVE
2) facility has no SIU's, does not have Division approved Pretreatment Program
X
3) facility has Sills and DWQ approved Pretreatment Program (list "DEV" if program still under development)
X
3a) Full Program with LTMP
3b) Modified Program with STMP
4) additional conditions regarding Pretreatment attached or listed below
Flow, MGD
Permitted
Actual
Time period for Actual
STMP time frame:
Industrial
0.3215
0.1
May 05-June 07
Most recent:
Uncontrollable
n/a
11.16
May 05-June 07
Next Cycle:
POC in LIMP!
STMP
Parameter of
Concern (POC)
Check List
POC due to
NPDES/ Non-
Disch Permit
Limit
Required by
EPA*
Required
by 603
Sludge**
POC due
to S IU***
POTW POC
(Explain
)**"
below"
STMP
Effluent
Freq
LIMP
Effluent
Freq
X
BOD
X
Q
X
TSS
X
Q
Q = Quarterly
X
NH3
X
Q
M = Monthly
X
Arsenic
X
Q
Ni
Cadmium
4
X
X
Q
'I
Chromium
X
J
X
Q
4
Copper
4
Q
.
X
Cyanide
X
X
Q
Is all data on DMRs?
4
Lead
4
X
X
Q
YES
X
Mercury
X
X
Q
NO (attach data)
X*
Molybdenum
'I
Nickel
X
4
X
Q
X
Silver
Q
X
Selenium
Q
4
Zinc
4
Q
Is data in spreadsheet?
X
Total Nitrogen
Q
YES (email to writer)
X
Phosphorus
X
Q
NO
X
X
Beryllium
X
Q
X
Fluoride
Q
X
Iron
Q
*Always in the LTMP/STMP ** Only in LTMP/STMP if sludge land app or composte (dif POCs for incinerators)
*** Only in LTMP/STMP while SIU still discharges to POTW **** Only in LTMP/STMP when pollutant is still of concern to POTW
Comments to Permit Writer (ex.. explanation of any POCs; info you have on IU related investigations into NPDES problems):
Selenium and Iron were included in the LTMP as they were noted as NPDES monitoring requirements. Nitrogen and Fluoride were listed as
having an NPDES permit limit.
* The DMRs are missing Cd data from June -Nov 2011. There is monthly data from Jan -May 2011 and quarterly data prior to that. Also Ag
—data is not included and Se data is missing from 2008-2010. Ag and Se are included in the LTMP; however, are not required as the POTW
does not land apply their sludge and there are no SIU permit limits for these parameters.
—
N Buffalo PERCS NPDES request Jan 25 2012adsx
Revised: July 24, 2007

2012 Draft North Carolina 303(d) List -Category 5
Cape Fear River Basin
> f.U5 Nun.,ber Name
10-digit Watershed 0303000201
Description
Length or Ama
Reedy Fork
Category Rating Use
Reason for Rating
Parameter
Year
Category
> 16-11-14-ib
North Buffalo Creek
From North Buffalo Creek WWTP to Buffalo Creek
8.1
FW Miles
WS-V;NSW 5
5 Impaired Aquatic Life Standard Violation Copper
5 Impaired Aquatic Life Standard Violation Zinc
5 Impaired Water Supply Standard Violation NO2+NO3-N
2008
2008
2012
12-digit Subwatershed
030300020102
Reedy Fork -Lake Brandt
> 16-11-4-(1)a1 Brush Creek
From source to UT at SR 2085
2.4 FW IViiles W5-III;NSW
5 Impaired Aquatic Life
Fair Bioclassification Ecological/biological Integrity Benthos
1998
> 16-11-4-(1)a3
Brush Creek
From UT 0.3 miles downstream of SR 3820 to a point 0.5 mile
downstream of Guilford County SR 2190
1.6 FW Miles WS-III;NSW 5
5 Impaired Aquatic Life
5 Impaired Aquatic Life
Fair Bioclassification Ecological/biological Integrity FishCom 1998
Fair Bioclassification Ecological/biological Integrity Benthos
1998
> 16-11-5-(0.5)a
Horsepen Creek
From source to Ballinger Road
1.8
FW Miles
WS-III;NSW 5
5 Impaired Aquatic Life
Poor Bioclassification Ecological/biological Integrity Benthos
1998
> 16-11-5-(0.5)b
Horsepen Creek
From Ballinger Road to U.S. Hwy 220
3.2
FW Miles
WS-III;NSW 5
5 Impaired Aquatic Life
Poor Bioclassification Ecological/biological Integrity Benthos
2000
> 16-11-5-(2)
Horsepen Creek
From U.S. Hwy 220 to Lake Brandt, Reedy Fork
1.8
FW Miles
WS-III;NSW,CA 5
5 Impaired Aquatic Life
Fair Bioclassification Ecological/biological Integrity Benthos
2000
> 16-11-5-1-(2)
Unnamed Tributary at
Guilford College
From dam at Guilford College bathing lake to Horsepen Creek
1.3
FW Miles
WS-III;NSW 5
5 Impaired
Aquatic Life
Poor Bioclassification Ecological/biological Integrity Benthos
2006
S'Q i uffalo Creek.
Friday, February 10, 2012
Draft NC 303(d) List- Comments due March 12, 2012
Page 4 of 177

Cape Fear River Basin
> AU Number
2012 Draft North Carolina 303(d) List -Category 5
10-digit Watershed 0303000201 Reedy Fork
dame Description
Lent` or .rcv,
Units Classification Category
Category Rating Use
Reason for Rating
Parameter Year
Cape Fear River Basin
Cape Fear River Basin
8-digit Subbasin 03030002
10-digit Watershed 0303000201
12-digit Subwatershed 030300020108
> 16-11-(9)b
Haw River
Reedy Fork
City of Ossipee-Reedy Fork
Reedy Fork (Hardys Mill From Buffalo Creek to Haw River 8.6 FW Miles WS-V;NSW 5
Pond)
5 Impaired Aquatic Life Standard Violation Lint 2008
5 Impaired Recreation Standard Violation Fecal Coliform (recreation) 2004
12-digit Subwatershed 030300020101
> 16-11-(1)a Reedy Creek
From source to UT 0.7 miles downstream of SR 2128
Headwaters Reedy Fork
FW Miles WS-III;NSW 5
Impaired Aquatic Life Fair Bioclassification Ecological/biological Integrity FishCom 2012
> 16-11-(1)b Reedy Fork
From SR 2128 to a point 0.4 mile downstream of Moores Creek
4.2 FW Miles WS-III;NSW S
Impaired Aquatic Life
Fair Bioclassification
Ecological/biological Integrity FishCom 2006
> 16-11-14-1a1
North Buffalo Creek
12 digit S bwa erghed f,si
From source to Philadelphia Lake
03P00020195 •
•
7.5
FW Miles
North Buffalo Creek
WS-V;NSW 5
5 Impaired Aquatic Life
5 Impaired Aquatic Life
Poor Bioclassification Ecological/biological Integrity FishCom 1998
Poor Bioclassification Ecological/biological Integrity Benthos
1998
> 16-11-14-1a2
North Buffalo Creek
From Philadelphia Lake to North Buffalo Creek WWTP
1.6
FW Miles
WS-V;NSW 5
5 Impaired Aquatic Life
5 Impaired Aquatic Life
Poor Bioclassification Ecological/biological Integrity FishCom
2012
Poor Bioclassification Ecological/biological Integrity Benthos 2008
Friday, February 10, 2012
Draft NC 303(d) List- Comments due March 12, 2012
Page 3 of 177

NC 2010 Integrated Report Categories 4 and 5 Impaired Waters
F ti
AU Number AU_Name AU Description
Category Parameter
Reason for Rating
LengthArea AU_Units Classification
Use Category Collection Year 303(d)year
Cape Fear River Basin
Cape Fear R gr Basin
Cape Fear River. Basin
Q 16-11-4-(1)al Brush Creek
5 Ecological/biological Integrity Benthos
From source to UT at SR 2085
Fair Bioclassification Aquatic Life
Reedy Fork.Watershed `' 0303000201
RiverSbba�n:
Reedy Fork Watershed 0303000201
2.4 FW Miles WS-III;NSW
2003 1998
Q 16-11-4-(1)a3 Brush Creek
5 Ecological/biological Integrity Benthos
From UT 0.3 miles downstream of SR 3820
to a point 0.5 mile downstream of Guilford
County SR 2190
Fair Bioclassification Aquatic Life
1.6 FW Miles WS-III;NSW
2003 1998
5 EcologicaUbiological Integrity FishCom
Fair Bioclassification Aquatic Life
2004 1998
Q 16-11-5-(0.5)a Horsepen Creek
5 EcologicaUbiological Integrity Benthos
From source to Ballinger Road 1.8 FW Miles WS-III;NSW .
Poor Bioclassification Aquatic Life
2001 1998
Q 16-11-5-(0.5)b Horsepen Creek
5 Ecological/biological Integrity Benthos
From Ballinger Road to U.S. Hwy 220 3.2 FW Miles WS-III;NSW
Poor Bioclassification Aquatic Life
2000 2000
Q 16-1,1-5-(2) Horsepen Creek
5 EcologicaUbiological Integrity Benthos
From U.S. Hwy 220 to Lake Brandt, Reedy 1.8 FW Miles WS-
Fork
Fair Bioclassification Aquatic Life
I I I;NSW,CA
2008 2000
5 Ecological/biological Integrity FishCom
Fair Bioclassification Aquatic Life
2004 2000
Q 16-11-14-1a1 North Buffalo Creek
5 Ecological/biological Integrity Benthos
From source to Philadelphia Lake 7.5 FW Miles C;NSW
Poor Bioclassification Aquatic Life 1997 1998
5 Ecological/biological Integrity FishCom
Poor Bioclassification Aquatic Life
2004 1998
4t Fecal Coliform (recreation)
Standard Violation Recreation
2008 1998
Q 16-11-14-1a2 North Buffalo Creek
5 Ecological/biological Integrity Benthos
From Philadelphia Lake to North Buffalo 1.6 FW Miles C;NSW
Creek WWTP
Poor Bioclassification Aquatic Life
1998 2008
4t Fecal Coliform (recreation)
Standard Violation Recreation
2008 2008
Q 16-11-14-ib North Buffalo Creek
4b Ammonia
From North Buffalo Creek WWTP to Buffalo 8.1 FW Miles C;NSW
Creek
Data Inconclusive Aquatic Life
2000 2000
5 Copper
Standard Violation Aquatic Life
2008 2008
4s Ecological/biological Integrity Benthos
Fair Bioclassification Aquatic Life
2008 2008
4s Ecological/biological Integrity FishCom
Poor Bioclassification Aquatic Life
2003 2008
5 Zinc
Standard Violation Aquatic Life
2008 2008
NC 2010 Integrated Report Category 4 and 5 303(d) List EPA Approved Aug 31, 201 9/20/2010 Page 3 of 145

•
IWC Calculations
Facility: N. Buffalo Creek WWTP
NC0024325
Prepared By: Julie Grzyb
Enter Design Flow (MGD):
Enter s7Q10 (cfs):
Enter w7Q10 (cfs):
16
0.9
2.6
Total Residual Chlorine (TRC)
Daily Maximum Limit (ug/l)
s7Q10 (CFS)
DESIGN FLOW (MGD)
DESIGN FLOW (CFS)
STREAM STD (UG/L)
Upstream Bkgd (ug/I)
IWC (%)
Allowable Conc. (ug/I)
Fecal Coliform
Monthly Average Limit:
(If DF >331; Monitor)
(If DF<331; Limit)
Dilution Factor (DF)
0.9
16
24.8
17.0
0
96.50
18
Ammonia (Summer)
Monthly Average Limit (mg NH3-N/I)
s7Q10 (CFS)
DESIGN FLOW (MGD)
DESIGN FLOW (CFS)
STREAM STD (MG/L)
Upstream Bkgd (mg/I)
IWC (%)
Allowable Conc. (mgll)
Ammonia (Winter)
Monthly Average Limit (mg NH3-NA)
w7Q10 (CFS)
2001100m1 DESIGN FLOW (MGD)
DESIGN FLOW (CFS)
STREAM STD (MG/L)
• 1.04 Upstream Bkgd (mg/1)
IWC (%)
Allowable Conc. (mg/I)
Total Residual Chlorine
1. Cap Daily Max limit at 28 ug/I to protect for acute toxicity
Ammonia (as NH3-N)
1. If Allowable Conc > 35 mg/I, Monitor Only
2. Monthly Avg limit x 3 = Weekly Avg limit (Municipals); capped at 35 mg/I
3. Monthly Avg limit x 5 = Daily Max limit (Non-Munis); capped at 35 mg/I
4. BAT for Minor Domestics: 2 mg/I (summer) and 4 mg/l (winter)
5. BAT for Major Municipals: 1 mg/l (year-round)
0.9
16
24.8
1.0
0.22
96.50
1.0
2.6
16
24.8
1.8
0.22
90.51
2.0
Fecal Coliform
1. Monthly Avg limit x 2 = 400/100 ml = Weekly Avg limit (Municipals) = Daily Max limit (Non -Muni)
NPDES Server/Current Versions/WLA; TB 1/16/2009

ATA
NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue Charles Wakild. P. E. Dee Freeman
Governor Director Secretary
July 20, 2012
MEMORANDUM
'1'0: Lisa Edwards
NCDENR / DWR / Regional Engineer
Winston-Salem Regional Office
From:
Julie Grzyb
NPDES Unit
Subject Review of Draft NPDES Permit NC0024325
Greensboro — North Buffalo WWTP
Guilford County
Please indicate below your agency's position or viewpoint on the draft permit and return this form within two
weeks (by August 3, 2012). If you have any questions on the draft permit, please contact me at (919) 807-
6389 or e-mail Julie.grzybencdenr.gov.
RESPONSE: (Check one)
X
Signed,
Concur with the issuance of this permit provided the facility is operated and maintained
properly, the stated effluent limits are met prior to discharge, and the discharge does not
contravene the designated water quality standards.
Concurs with issuance of the above permit, provided the following conditions are met:
Opposes the issuance of the above permit, based on reasons stated below, or attached:
Date: 7-20-12
1617 Mail Service Center, Raleigh, North Carolina 27699-1617
Location: 512 N. Salisbury St. Raleigh, North Carolina 27604
Phone: [phone] l FAX: [phone]
Internet www.ncwateraualitv.orq
An Equal Opportunity \ Affirmative Action Employer
Noie
thCarolina
atura!!ij

City of Greensboro
� I North Carolina
August 3, 2012 [via email]
Ms. Julie Grzyb
NC DENR NPDES Unit
1617 Mail Service Center
Raleigh NC 27699-1617
Water Resources Department
RE: City of Greensboro North Buffalo Draft NPDES Permit Comments (NC0024325)
Dear Julie,
We appreciate the opportunity to comment on the draft North Buffalo Permit dated July 20, 2012 and
postmarked July 25, 2012. We have read the permit and permit fact sheet carefully and have no
objections to the conditions and requirements in the current version of the permit.
Please be aware, however, that the City of Greensboro will request a permit modification to allow
reduced monitoring for certain parameters (CBOD, TSS, Fecal, etc.) when the DWQ NPDES Permit Unit
establishes the criteria/policy to implement the reduced monitoring strategy. The strategy was
discussed in a July 25, 2012 meeting with Chuck Wakild, Matt Matthews and the Board of Directors of
the North Carolina Water Quality Association and it was my understanding that the strategy will be
forthcoming soon.
Thank you for your time and efforts in working with us to get the North Buffalo permit renewed. There
were several important issues that developed during the permit renewal process and we are grateful for
your diligence and patience in resolving those issues.
Sincerely,
4ctrt'e� graoi'ne'
Martie Groome
Laboratory and Industrial Waste Section Supervisor
Cc: Kenney McDowell, Water Resources Department Deputy Director (via email)
Don Howard, Water Reclamation Manager (via email)
Ed Osborne, ORC North Buffalo POTW (via email)
Lori Cooper, ORC T. Z. Osborne POTW (via email)
Alicia Goots, Laboratory Coordinator (via email)
Paul Calamita, AquaLaw/North Carolina Water Quality Association (via email)
Matt Matthews, DWQ (via email)
Jeff Poupart, DWQ (via email)
PO Box 3136 , Greensboro, NC 27402-3136 ; www.greensboro-nc.gov , 336-373-CITY (2489) TTY # 333-6930

, Grzyb, Julie
From: Mickey, Mike
Sent: Wednesday, August 01, 2012 2:38 PM
To: Grzyb, Julie
Cc: Basinger, Corey
Subject: RE: N. Buffalo WWTP draft Permit, NC0024325
Julie —The N. Buffalo draft looks fine. Proceed with issuance. Mike.
Mike Mickey
[e-mail]
NC Division of Water Quality
585 Waughtown Street
Winston-Salem, NC 27107
Phone: [phone]
FAX: [phone]
E-mail correspondence to and from this address may be subject to the North
Carolina Public Records Law and may be disclosed to third parties.
From: Basinger, Corey
Sent: Tuesday, July 31, 2012 3:11 PM
To: Mickey, Mike
Subject: FW: N. Buffalo WWTP draft Permit, NC0024325
FYI
W. Corey Basinger
Regional Supervisor
Surface Water Protection Section
Winston-Salem Regional Office
Division of Water Quality
Email: corev.basinger(c@ncdenr.i;ov
Phone: [phone]
Fax [phone]
E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to third
parties.
From: Grzyb, Julie
Sent: Tuesday, July 31, 2012 3:01 PM
To: Basinger, Corey
Cc: Belnick, Tom
Subject: N. Buffalo WWTP draft Permit, NC0024325
Corey,
The Draft North Buffalo permit was public noticed at the end of April 2012 and no comments were received except for
Greensboro's concern over the impact of the WS-V classification. Both Greensboro Permits were then put on hold. On July 16,
2012, Senate Bill 810 was adopted and included the revisions to the WS-V classifications in Jordan and the Falls. The regulations
did not affect the draft permit for the N. Buffalo WWTP. Therefore, I resent the draft for the N. Buffalo WWTP permit back to
1

Greensboro with one minor change per their request (Greensboro wanted to be able to request a permit modification after the
.mercupy TMDL is adopted).
Attached is the draft permit, addendum to original fact sheet, and a new cover letter recognizing the minor change. Martie said
she would have comments to me by Friday, August 3`d. I did not recall WSRO having any comments on the original draft but let
me know. I am hoping to issue the final permit next week provided Greensboro does not have any significant comments.
Julie
Julie A. Grzyb, Environmental Engineer
NC DENR / Division of Water Quality / Surface Water Protection Section
NPDES Complex Permitting, Point Source Branch
1617 Mail Service Center, Raleigh, NC 27699-1617
919/807-6389 (wk); 919/807-6495 (fax)
**Please note, my email address has changed to julie.frzyWncdenr.Jov
E-mail correspondence to and from this address may be subject to the North Carolina Public Records law and may be disclosed
to third parties.
2

Grzyb, Julie
From: Karrie-Jo Shell [Shell. [e-mail]]
Sent: Monday, July 02, 2012 1:57 PM
To: Grzyb, Julie
Subject: RE: City of Greensboro plants (NC0047384 and NC0024325)
Thanks. Our review is complete.
Karrie-Jo Robinson -Shell, P.E.
"Grzyb, Julie" ---07/02/2012 12:14:52 PM---Karrie-Jo (Pam), Attached is the Nitrogen optimization plan for both of Greensboro's
WWTPs.
From: "Grzyb, Julie" <[e-mail]>
To: Karrie-Jo Shell/R4/USEPA/US@EPA
Cc: Pamala Myers/R4/USEPA/US@EPA
Date: 07/02/2012 12:14 PM
Subject: RE: City of Greensboro plants (NC0047384 and NC0024325)
Karrie-Jo (Pam),
Attached is the Nitrogen optimization plan for both of Greensboro's WWTPs.
Karrie-Jo, I believe this is the only thing Pam wanted to see on N. Buffalo (NC0024325) to finish out her review.
Please let me know if you need anything else.
Julie
From: Pamala Myers[mailto:Myers,Pamala@&epamail.epa.gov]
Sent: Friday, June 29, 2012 4:17 PM
To: Grzyb, Julie
Cc: myers.pamala©epa.gov
Subject: Fw: City of Greensboro plants (NC0047384 and NC0024325)
Second attempt to send this email.
Please confirm receipt.
Thank you.
Pamala Myers
4°4.562.9421
yers. pamalat@_ e pa.gov
Environmental Engineer and Technical Advisor I Pollution Control and Implementation Branch
Water Protection Division I Municipal and Industrial NPDES Section
U.S. EPA, Region 4 161 Forsyth St. SW I Atlanta, GA 30303
Forwarded by Pamala Myers/R4/USEPA/US on 06/29/2012 04:16 PM
From: Pamala Myers/R4/USEPA/US
To: "Grzyb, Julie" <julie.grzyb a(7ncdenr.gov>, tom.belnick(Thncdenr.gov
Cc: myers.pamala(6 eoa.00v, Mark Nuhfer/R4/USEPA/US@EPA
Date: 06/28/2012 11:07 AM
Subject: Fw: City of Greensboro plants (NC0047384 and NC0024325)
1

Hello Julie,
I am closing out my outstanding permit reviews before I move into my Watershed Coordinator detail next Monday.
We received the July 15, 2012 memo that addresses the first 2 comments [included below] from my original email. Thank you.
If you could send me a brief response to the last comment included here again: "We would also like to see a copy of the nitrogen
optimization plan, dated 2/11/2010 if it is readily available."
I can then close out this review and send you a no -comments letter if that applies.
Thanks for your assistance with this today.
Sincerely,
Pamala Myers
404.562.9421
myers. pamal [e-mail]
Environmental Engineer and Technical Advisor I Pollution Control and Implementation Branch
Water Protection Division I Municipal and Industrial NPDES Section
U.S. EPA, Region 4 161 Forsyth St. SW I Atlanta, GA 30303
Forwarded by Pamala Myers/R4/USEPA/US on 06/28/2012 11:02 AM
From: Pamala Myers/R4/USEPA/US
To: "Grzyb, Julie" <julie.grzyb a�ncdenr.gov> tom.belnick anncdenr.gov
Cc: Mark Nuhfer/R4/USEPA/US@EPA
Date: 05/18/2012 01:24 PM
Subject: City of Greensboro plants (NC0047384 and NC0024325)
Hello Julie,
First, thank you for including the permit application data to assist me with my review of these 2 permits. I only have a couple
comments for you.
If it is available, we would like to see a copy of the NC policy for reducing monitoring frequency. It appears to be contrary to the
guidelines I have recently sent to other NC DWQ permit writers for their use.
The Interim Guidance for Performance -Based Reduction of NPDES Permit Monitoring Frequencies, EPA 833-B-96-001, April
1996.
ask this because the TZ Osborne plant had 4 mercury NOVs in their previous permit cycle and continues to indicate RP for
mercury and yet their monitoring was reduced. The fact sheet states that Copper and Zinc also indicate RP and again their
monitoring was reduced.The same comment applies to Cyanide. Similar comments are included in the North Buffalo permit
We would also like to see a copy of the nitrogen optimization plan, dated 2/11/2010 if it is readily available.
Thank you Julie,
We appreciate your time,
Pam
Pamala Myers
404.562.94.21
[e-mail]
Environmental Engineer and Technical Advisor I Pollution Control and Implementation Branch
Water Protection Division I Municipal and Industrial NPDES Section
2

News & Record
Published by
News & Record, Inc.
Greensboro, North Carolina
North Carolina, Guilford County
Before the undersigned, a Notary Public of said County and State, duly commissioned, qualified and authorized by law to
administer oaths, personally appeared the Publisher's Representative who being first duly sworn, deposed and says:
AFFIDAVIT OF
1. That he/she is the Publisher's Representative of the Greensboro News & Record, Inc. a corporation, engaged in the
publication of newspapers known as "News & Record", published, issued and entered as second class mail in the City of
Greensboro in said County and State.
2. That he/she is authorized to make this affidavit and sworn statement; that the notice or other legal advertisement,
a copy of which is attached hereto, was published in the News & Record on the dates listed below.
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 newspaper meeting all of the requirements and qualifications of
Section 1-597 of the General Statutes of North C•plina and was a qualified newspaper within the meaning of Section 1-59'
of the General Statutes of North Carolina.
Name
NCDENR DWQ NPDES
Publisher's Representative
Sworn to and subscribed before me, this day of
Notary Public
Ad # Date Edition Class PO
34611801 04/28/12 News & Record 400 Notice of In
la 0
Ad Copy
p,NINE /%
IOTA/
My Comm. Exp. —_
6/15/2014 —
PUB LIG )
/ 'TO/CO>J ,\\`\
Public NoticeNorth Carolina Environmenta

Ad ID 134611801 Date
04/26/2012
Time
L2:20 PM
Public Notice
North Carolina Environrrental
Management Corrnission/
NPDES Unit
1617 Mail Service Center
Raleigh, NC 27699-1617
Notice of Intent to Issue a NPDES
Wastewater Permit
The North Carolna Environmental
Management Gorrnission proposes
to issue a NPDES wastewater
discharge permit tothe person(s)
listed below.
Written comments regarding the
proposed pemit will be accepted
until 30 days afterthe pubis h date of
this notice. The Director of the NC
Division of Water Quality (DW) may
hold a public hearing should there be
a signifeant degree of public interest
Please rred corrrrents and/or
information requests to DWQ at the
above address. Interested persons
nay visit the DWQ at 512 N. Salisbury
Street, Raleigh, NC to review
information on file. Additional
information on NPDES permits and
this notice may be found on our
website:
httpl/portal.ncdenrorg'webMq vvp/p
s'npdeskalendar, or by calling (919)
807-6304
City of Greensboro, requested renewal
of permit NC0047384for the T.Z
Osborne WWTP in Guilford County;
this permitted discharge is treated
rrunicipal and industrial wastewater
to South Buffalo Creek, Cape Fear
River Basin.
City of Greensboro, requested renewal
of permit NC0024325 for the N.
Buffalo WWTP in Gulford County,
this peril dtteddischarge is treated
rrunkipal and industrial wastewater
to North Buffab Creek, Cape Fear
River Basin.
Ad shown is not actual print size

J City of Greensboro
North Carolina
December 29, 2010
NC DENR/DWQ
Attn: NPDES Unit
1617 Mail Service Center
Raleigh NC 27699-1617
Water Resources Department
RE: City of Greensboro North Buffalo NPDES Permit Application for Renewal (NC0024325)
To Whom It May Concern:
Enclosed please find three (3) copies of the North Buffalo POTW NPDES Permit Application for Renewal,
along with the required attachments.
On November 16, 2010, the City of Greensboro submitted a Request for Speculative Limits to DWQ for
the T. Z. Osborne POTW at 56 MGD (sent to Chuck Wakild, Matt Matthews and Jeff Poupart). This
request includes the plan to decommission the North Buffalo facility. We have not yet received a reply
and as mentioned in the original document, we would ask for an expedited response. Obviously,
depending on the outcome of the Speculative Limits Request, the City may need/wish to amend the
enclosed permit application.
As soon as possible, please provide written documentation that the NPDES Unit has received the North
Buffalo application and that it is considered complete.
If you have any questions or need additional information, please do not hesitate to contact me.
Sincerely,
Martie Groome
Laboratory and Industrial Waste Section Supervisor
Phone [phone]
Email: [e-mail]
cc: Allan Williams, Director of Water Resources (via email with documents attached)
Kenney McDowell, Deputy Directory of Water Resources (via email with documents attached)
Don Howard, Water Reclamation Manager (via email with documents attached)
Walter Kling, Operations Superintendent (via email with hard copy documents)
Ed Osborne, ORC-North Buffalo (via email with hard copy documents)
PO Box 3136 , Greensboro, NC 27402-3136 , www.greensboro-nc.gov , 336-373-CITY (2489) , TTY # 333-6930

'FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
City of Greensboro North Buffalo, NC0024325
Renewal
Cape Fear
PART F ATTACHMENT 1
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: Greensboro Industrial Platers 01
Mailing Address: 725 Kenilworth Street
Greensboro, NC 27403
F.4. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Cleaning. rinse. nickel plating. electroless nickel
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): Service Industry — Job Shop Etectroplater
Raw materal(s): alkaline cleaner, degreaser. nickel, hydrochloric acid. nitric acid
F.6. Flow Rate.
a. Process wastewater flow rate. indicate the average daily volume of process wastewater discharge into the collection
system in gallons per day (gpd) and whether the discharge is continuous or intermittent.
2926 gpd (X continuous or intermittent)
b. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow discharged into
the collection system 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 0 No
b. Categorical pretreatment standards ® Yes ❑ No
If subject to categorical pretreatment standards, which category and subcategory?
Electroplating 40 CFR Part 413 Subpart A (413.14) and Subpart G (413.74) — Job Shop Discharging Less than 10,000 GPD
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 © No If yes, describe each episode.

• v
FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
City of Greensboro North Buffalo, NC0024325
Renewal
Cape Fear
PART F ATTACHMENT 2
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: Triad Anodizing and Plating Company. Inc.
Mailing Address: 3502 Spring Garden Street
Greensboro. NC 27407
F.4. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Zinc plating, anodize bath. chromate bath. dichromate bath. dyeing and chemical filming
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): Job Shop Electroplater
Raw material(s): ' zinc chloride, potassium chloride. boric acid. hydrochloric acid. sulfuric acid, alkaline cleaners,
caustic soda etch. nitric add, nickel acetate seal, dues. chromate. deox
F.6. Flow Rate.
a. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into the collection
system in gallons per day (gpd) and whether the discharge Is continuous or intermittent.
3110 gpd (X continuous or intermittent)
b. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow discharged into
the collection system 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 ® Yes ❑ No
If subject to categorical pretreatment standards, which category and subcategory?
Electroplating 40 CFR Part 413 Subpart A (413.14) and Subpart D (413.44) Job Shop Discharging Less than 10.000 GPD
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.

FACILI Y NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
'° City of Greensboro North Buffalo, NC0024325
Renewal
Cape Fear
PART F ATTACHMENT 3
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: Guilford Plating Company
Mailing Address: 3318 Church Street Ext.
Greensboro. NC 27405
F.4. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Copper bath, zinc bath. nickel bath. chrome bath. cleaning. parts rinse
F.S. Principal Product(s) and Raw Materia!(s). Describe all of the principal processes and raw materials that affect or
contribute to the SIU's discharge.
Principal product(s): Job Shop Electroolater
Raw material(s): copper, zinc, nickel sulfate, boric acid. brighteners, purifier, sulfuric acid. alkaline cleaner and
chrome
F.6. Flow Rate.
a. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into the collection
system in gallons per day (gpd) and whether the discharge is continuous or intermittent.
126 gpd ( continuous or X intermittent)
b. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow discharged into
the collection system 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
b. Categorical pretreatment standards
® Yes
® Yes
❑ No
❑ No
If subject to categorical pretreatment standards, which category and subcategory?
Electroplating 40 CFR Part 413 Subpart A (413.14) — Job Shop Discharging Less Than 10,000 GPD
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.

•.
ter,
FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
City of Greensboro North Buffalo, NC0024325
Renewal
Cape Fear
PART F ATTACHMENT 4
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: Lorillard Tobacco Co.
Mailing Address: 2525 East Market Street
Greensboro, NC 27401
F.4. Industrial Processes. Describe all the industrial processes that affect or contribute to the S!U's discharge.
Casing, Menthol Preparation, Cigarette Manufacturing. Drying, Mix kitchen
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): Cigarettes
Raw materia!(s): Tobacco. flavorings. menthol. paste
F.6. Flow Rate.
a. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into the collection system in gallons per
day (gpd) and whether the discharge is continuous or intermittent.
210.309 gpd (X continuous or intermittent)
b. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow discharged into the collection
system 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 0 No
b. Categorical pretreatment standards ❑ Yes ® No
If subject to categorical pretreatment standards, which category and subcategory?
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.

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
`e City of Greensboro North Buffalo, NC0024325
Renewal
Cape Fear
PART F ATTACHMENT 5
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: Pugh Metal Finishing
Mailing Address: 802 West Lee Street
Greensboro. NC 27403
F.4. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Zinc plating, cadmium plating, nickel plating, black oxide bath and rinses
F.S. 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): Job Shop Electroplater
Raw material(s): Alkaline cleaner. chromic acid. zinc, nickel, copper. cyanide sodium. sodium hydroxide. muriatic
acid, brightener, black oxide
F.6. Flow Rate.
c. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge Into the collection
system in gallons per day (gpd) and whether the discharge is continuous or intermittent.
3491 gpd (X continuous or intermittent)
d. Non -process wastewater flow rate. indicate the average daily volume of non -process wastewater flow discharged into
the collection system 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 N Yes ❑ No
b. Categorical pretreatment standards N Yes ❑ No
If subject to categorical pretreatment standards, which category and subcategory?
Electroplating 40 CFR Part 413 Subpart A (413.14) — Job Shop Discharging Less Than 10.000 GPD
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 N No If yes, describe each episode.