NC0047597_Permit Issuance_20020417

State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
Michael F. Easley, Governor
William G. Ross, Jr., Secretary
Gregory J. Thorpe, Ph.D., Acting Director
Mr. A. Terry Rolan
City of Durham
101 City Hall Plaza
Durham, North Carolina 27701
Dear Mr. Rolan:
A inA
NCDENR
April 17, 2002
Subject: Issuance of NPDES Permit NC0047597
South Durham Water Reclamation Facility
Durham County
Division personnel have reviewed and approved your application for renewal of the subject permit.
Accordingly, we are forwarding the attached NPDES discharge permit. This permit is issued pursuant to
the requirements of North Carolina General Statute 143-215.1 and the Memorandum of Agreement
between North Carolina and the U.S. Environmental Protection Agency dated May 9, 1994 (or as
subsequently amended.)
The final permit allows the City of Durham to discharge up to 20.0 MGD of treated wastewater from
the South Durham Water Reclamation Facility to New Hope Creek, a class WS-IV NSW water in the Cape
Fear River Basin. The permit includes discharge limitations for flow, biochemical oxygen demand (BOD),
total suspended solids (TSS), ammonia, dissolved oxygen, fecal coliform bacteria, pH, total phosphorus, and
chronic toxicity.
The following modification has been added to the final permit:
• The Division may re -open this permit to require weekly average limits for ammonia. After
calculating allowable concentrations, the Division will perform an analysis of past ammonia data to
determine if there is a reasonable potential for this discharge to exceed these potential limits. If
there is, this permit will be re -opened. If there is not, the permit will not be re -opened, but will
contain weekly average limits for ammonia upon renewal
The following modifications were included in the draft permit and remain in the final permit:
• Mercury monitoring has been deleted. A reasonable potential analysis of effluent data indicated
that the water quality standard would not be violated.
• Copper monitoring has been deleted. A reasonable potential analysis of effluent data indicated
that the State action level would not be violated.
• Silver monitoring has been deleted. A reasonable potential analysis of effluent data indicated that
the water quality action level would not be violated.
• A fluoride effluent limit of 1808 µg/l for was added to the permit. A reasonable potential
analysis of effluent data indicated that the water quality standard of 1800 ug/l could be violated
ins tream.
1617 Mail Service Center, Raleigh, North Carolina 27699-1617 Telephone [phone]/FAX [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled/ 10% post -consumer paper

• Zinc monitoring has been increased to 2/month. A reasonable potential analysis of effluent
data indicated that the water quality standard of 50 µg/1 could be violated instream.
• Effluent samples for dissolved oxygen, fecal coliform, and temperature shall be daily grab
samples based on 15 NCAC 2B .0500. The frequencies for upstream and downstream monitoring
for these parameters are designated in the Part I. A. (3.).
• Please note that this facility discharges to nutrient sensitive water (NSW) and has total
phosphorus limits as a result of the NSW strategy. In 1997, the Clean Water Responsibility Act
(House Bill 515) was enacted, with the intent to strengthen the control of nutrients from all
discharges to NSW waters. Facilities permitted to discharge >_ 500,000 gallons per day (and any new
or expanding facilities) will be subject to nutrient limitations for total nitrogen and total phosphorus
according to House Bill 515 requirements. The nutrient limitations are effective January 1, 2003
and are included in this permit. Please note that modeling results may result in limits lower than
those mandated by House Bill 515.
If any parts, measurement frequencies or sampling requirements contained in this permit are
unacceptable to you, you have the right to an adjudicatory hearing upon written request within thirty (30)
days following receipt of this letter. This request must be in the form of a written petition, conforming to
Chapter 150B of the North Carolina General Statutes, and filed with the office of Administrative Hearings,
6714 Mail Service Center, Raleigh, North Carolina 27699-6714. Unless such a demand is made, this permit
shall be final and binding.
Please take notice that this permit is not transferable. The Division may require modification or
revocation and reissuance of the permit. This permit does not affect the legal requirements to obtain other
permits which may be required by the Division of Water Quality or permits required by the Division of
Land Resources, Coastal Area Management Act, or any other Federal or Local governmental permits may
be required.
If you have any questions or need additional information, please contact Ms. Jacquelyn Nowell at
[phone], extension 512.
Sincerely,
Original Signed By
David A. Goodrich
Gregory J. Thorpe, Ph.D.
cc: Central Files
Raleigh Regional Office / Water Quality Section
Aquatic Toxicology Unit
Point Source Compliance/Enforcement Unit
Technical Assistance & Certification Unit
NPDES Unit/Permit File ,
EPA Region IV/Attn: Roosevelt Childress

Permit NC0047597
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provision of North Carolina General Statute 143-215.1, other lawful
standards and regulations promulgated and adopted by the North Carolina Environmental
Management Commission, and the Federal Water Pollution Control Act, as amended,
City of Durham
is hereby authorized to discharge wastewater from a facility located at the
South Durham Water Reclamation Facility
6605 Farrington Road
Durham
Durham County
to receiving waters designated as the New Hope 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 June 1, 2002
This permit and authorization to discharge shall expire at midnight on April 30, 2006.
Signed this day April 17, 2002
Original Signed By
David A. Goodrich
Gregory J. Thorpe, Ph.D., Acting Director
Division of Water Quality
By Authority of the Environmental Management Commission

Permit No. NC0047597
SUPPLEMENT TO PERMIT COVER SHEET
City of Durham
is hereby authorized to:
1. Continue to operate an existing 20.0 MGD wastewater treatment facility
consisting of screening and grit removal, primary clarification, aeration,
secondary clarification, flocculation basins, tertiary filters, ultraviolet
disinfection, residual anaerobic digesters, aerobic digesters, gravity belt
thickeners, clarifier, sand drying beds, and belt filter press, located at
South Durham Water Reclamation Facility, 6605 Farrington Road,
Durham, Durham County, and
2. Discharge from said treatment works at the location specified on the
attached map into New Hope Creek, which is classified WS-IV NSW
water in the Cape Fear River Basin.

Permit NC0047597
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS — FINAL
During the period beginning on the effective date of the permit and lasting until December 31, 2002,
the Permittee is authorized to discharge from outfall 001. Such discharges shall be limited and
monitored by the Permittee as specified below:
EFFLUENT
CHARACTERISTICS
LIMITS
MONITORING -REQUIREMENTS
Monthly
Average
Weekly
Average
Daily
Maximum
Measurement
Frequency
Sample Type .
R
Sample Location'
Flow
20.0 MGD
Continuous
Recording
Influent or Effluent
BOD, 5-day, 20°C
(April 1- October 31) 2
5.0 mg/L
7.5 mg/L
Daily
Composite
Influent & Effluent
BOD, 5-day, 20°C
(November 1- March 31) 2
7.0 mg/L
10.5 mg/L
Daily
Composite
Influent & Effluent
Total Suspended Residue 2
30.0 mg/L
45,0-m
Daily
Composite
Influent & Effluent
NH3 as N3
(April 1- October 31)
1.0 mg/L
/,,= - _,
/
Daily
Composite
Effluent
NH3 as N3
(November 1- March 31)
2.0 mg/L (
/
-
Daily
Composite
Effluent
Dissolved 0xygen4
=
Daily
Grab
Effluent
Dissolved Oxygen
See Note 1
Grab
Upstream & Downstream'
pH5
Daily
Grab
Effluent
Total Residual Chlorine6
1.7.0 pg/L
Daily
Grab
Effluent
Total Nitrogen
(NO2+NO3+TKN)
--- - --
Monthly
Composite
Effluent
Total Phosphorus 7
(April 1- October 31)
0.5 m
- �-
---- --.
.%
Weekly
Composite
Effluent
Total Phosphorus 7
(November 1- March 31)
'-2.0_g.._/L
- __ _._
_.__.__._____
____.-__
__�...-_
Weekly
Composite
Effluent
Temperature, °C
Daily
Grab
Effluent
Temperature, °C
See Note 1
Grab
Upstream & Downstream'
Fecal Coliform
(geometric mean)
200 / 100 ml
400 / 100 ml
Daily
Grab
Effluent
Fecal Coliform
(geometric mean)
200 / 100 ml
400 / 100 ml
See Note 1
Grab
Upstream & Downstream'
Conductivity
See Note 1
Grab
Upstream & Downstream'
Total Fluoride
1810 pg/l
,
Weekly
Composite
Effluent
Total Zinc
2/Month
, Composite
Effluent
PO4
See Note 1
Grab
Upstream & Downstream'
TKN
See Note 1
Grab
Upstream & Downstream'
Total Phosphorus
See Note 1
Grab
Upstream & Downstream'
NO2+NO3
See Note 1
Grab
Upstream & Downstream'
Chronic Toxicity8
Quarterly
Composite
Effluent
Notes on following page:

Permit NC0047591
4
Notes
1. Upstream = New Hope Creek at I-40, Downstream = At NCSR 1107, See A (3) Special Conditions of the
Supplement to Effluent Limitations). Instream monitoring requirements in this NPDES permit shall be
provisionally waived so long as the Permittee remains a member of the Upper Cape Fear River Basin
Association. See A (4) Special Conditions of the Supplement to Effluent Limitations.
2. The monthly average effluent BOD5 and Total Suspended Residue concentrations shall not exceed 15% of the
respective influent value (85% removal).
3. The Division may re -open this permit to require weekly average limits for ammonia. After calculating
allowable concentrations, the Division will perform an analysis of past ammonia data to determine if there is a
reasonable potential for this discharge to exceed these potential limits. If there is, this permit will be re-
opened . If there is not, the permit will not be re -opened, but will contain weekly average limits for ammonia
upon renewal.
4. The daily average dissolved oxygen effluent concentration shall not be less than 6.0 mg/L.
5. The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units.
6. Monitoring requirement and limit applies only if chlorine is added for disinfection.
7. Compliance shall be based upon a quarterly average of weekly samples.
8. Chronic Toxicity (Ceriodaphnia) P/F ® 90%; January, April, July, and October (See A (6) Special Conditions of
the Supplement to Effluent Limitations).
There shall be no discharge of floating solids or visible foam in other than trace amounts.

Permit NC0047597
A. (2.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS — FINAL
During the period beginning on January 1, 2003 and lasting until expiration, the Permittee is
authorized to discharge from outfall 001. Such discharges shall be limited and monitored by the
EFFLUENT
CHARACTERISTICS
LIMITS
MONITORING REQUIREMENTS
Monthly .
Average
Weekly
Average
Daily
Maximum
Measurement
Frequency
Sample Type
Sample Location1
Flow
20.0 MGD
Continuous
Recording
Influent or Effluent
BOD, 5-day, 20°C
(April 1- 0ctober 31) 2
5.0 mg/L
7.5 mg/L
Daily
Composite
Influent & Effluent
BOD, 5-day, 20°C
(November 1- March 31) 2
7.0 mg/L
10.5 mg/L
Daily
Composite
Influent & Effluent
Total Suspended Residue 2
30.0 mg/L
45.0_,mg/1.--,,
Daily
Composite
Influent & Effluent
NH3 as N3
(April 1- 0ctober 31)
1.0 mg/L
1
j
/
)
Daily
Composite
Effluent
NH3 as N3
(November 1- March 31)
2.0 mg/L
______ /
,
Daily
Composite
Effluent
Dissolved 0xygen3
Daily
Grab
Effluent
Dissolved Oxygen
See Note 1
Grab
Upstream & Downstream1
pH5
Daily
Grab
Effluent
Total Residual Chlorine6
17.0pg1L
Daily
Grab
Effluent
Total Nitrogen 7
(NO2+NO3+TKN)
No)mit (mgiI)
Nplimit (Ibs/month)
Annual Limit: 334,705 ibs/yearr D 4-
Weekly
Monthly
Annual
Composite
Calculated
Calculate
Effluent
Effluent
Effluent
Total Phosphorus 8 7
(April 1- October 31)
0.5 mg/L
`wJ
r
� l-Ci" /
Weekly
Composite
Effluent
Total Phosphorus 8
(November 1- March 31)
2.0 mg/L
g
-
,"
WeeklyComposite
Effluent
Temperature, °C
_
Daily
Grab
Effluent
Temperature, °C
See Note 1
Grab
Upstream & Downstream1
Fecal Coliform
(geometric mean)
200 / 100 ml
400 / 100 ml
Daily
Grab
Effluent
Fecal Coliform
(geometric mean)
200 / 100 ml
400 / 100 ml
See Note 1
Grab
Upstream & Downstream1
Conductivity
_
See Note 1
Grab
Upstream & Downstream1
Total Fluoride
(1810 Ngll
) Weekly
Composite
Effluent
Total Zinc
`,_
2/Month
Composite
Effluent
PO4
See Note 1
Grab
Upstream & Downstream1
TKN
See Note 1
Grab
Upstream & Downstream1
Total Phosphorus
See Note 1
Grab
Upstream & Downstream1
NO2+NO3
See Note 1
Grab
Upstream & Downstream1
Chronic Toxicity9
Quarterly
Composite
Effluent
Notes on following page:

Permit NC0047597
Notes
1. Upstream = New Hope Creek at I-40, Downstream = At NCSR 1107, See A (3) Special Conditions of the
Supplement to Effluent Limitations). Instream monitoring requirements in this NPDES permit shall be
provisionally waived so long as the Permittee remains a member of the Upper Cape Fear River Basin
Association. See A (4) Special Conditions of the Supplement to Effluent Limitations.
2. The monthly average effluent BOD5 and Total Suspended Residue concentrations shall not exceed 15% of the
respective influent value (85% removal).
3. The Division may re -open this permit to require weekly average limits for ammonia. After calculating
allowable concentrations, the Division will perform an analysis of past ammonia data to determine if there is a
reasonable potential for this discharge to exceed these potential limits. If there is, this permit will be re-
opened . If there is not, the permit will not be re -opened, but will contain weekly average limits for ammonia
upon renewal.
4. The daily average dissolved oxygen effluent concentration shall not be less than 6.0 mg/L.
5. The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units.
6. Monitoring requirement and limit applies only if chlorine is added for disinfection.
7. Refer to Special Condition A (5) for Total Nitrogen Loading Calculation. The TN annual mass limit and TN
annual loading calculations become effective with the calendar year beginning January 1, 2003.
8. Compliance shall be based upon a quarterly average of weekly samples.
9. Chronic Toxicity (Ceriodaphnia) P/F @ 90%; January, April, July, and October (See A (6) Special Conditions of
the Supplement to Effluent Limitations).
There shall be no discharge of floating solids or visible foam in other than trace amounts.
4

Permit NC0047597
A. (3.) INSTREAM MONITORING REQUIREMENTS
Monitoring Locations:
Upstream - New Hope Creek at I-40
Downstream - At NCSR 1107
Parameter
Frequency
Sample Type
Dissolved Oxygen
3/week, June 1— September 30;1 /week, October 1— May 31
Grab
Fecal Coliform
3/week, June 1 — September 30; 1/week, October 1 — May 31
Grab
Temperature
3/week, June 1— September 30; 1/week, October 1— May 31
Grab
Conductivity
3/week, June 1— September 30; 1/week, October 1— May 31
Grab
pH
3/week, June 1 — September 30; 1/week, October 1 — May 31
Grab
Total Phosphorus
1 /week, June 1 — September 30
Grab
NO2 + NO3
1 /week, June 1 — September 30
Grab
TKN
1 /week, June 1— September 30
Grab
PO4
1 /week, June 1 — September 30
Grab
A. (4.) PROVISIONAL WAIVER OF INSTREAM MONITORING REQUIREMENTS
Instream monitoring requirements in this NPDES permit shall be provisionally waived so long as the Permittee
remains a member of the Upper Cape Fear River Basin Association and the Association continues to function as
approved by the Division and Environmental Management Commission. If the Permittee does not participate in the
Association or if the Association ceases to function, the instream monitoring requirements in this permit become
effective immediately; and the Division may reopen this permit by administrative letter to establish additional instream
monitoring requirements it deems necessary to adequately characterize the effects of the discharges on water quality in
the receiving stream.
A (5.) TOTAL NITROGEN LOADING CALCULATIONS
The Permittee shall calculate and report the annual mass loading of total nitrogen (TN) as the sum of monthly
loadings, according to the following equations:
(1) Monthly Mass Loading (pounds/month) = TN x Q x 8.34
where:
TN = The average TN concentration (mg/L) of the weekly composite samples collected during the month
Q = The total wastewater flow discharged during the month (MG/month)
8.34 = Conversion factor, from (mg/L x MG) to pounds
(2) Annual Mass Loading (pounds/year) = Sum of Monthly Mass Loadings for the calendar year
The Permittee shall report the total nitrogen concentrations for each sample and the monthly mass
loading in the appropriate monthly self -monitoring report, and the annual mass loading of total nitrogen
in the December self -monitoring report for the year. TN loading calculations are required with the
calendar year beginning January 1, 2003.

Permit NC004759V
A (6.) CHRONIC TOXICITY PERMIT LIMIT (Quarterly)
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:
Attention: NC DENR / DWQ / Environmental Sciences Branch
1621 Mail Service Center
Raleigh, North Carolina 27699-1621
Completed Aquatic Toxicity Test Forms shall be filed with the Environmental Sciences Branch no later than 30 days
after the end of the reporting period for which the report is made.
Test data shall be complete, accurate, include all supporting chemical/physical measurements and all
concentration/response data, and be certified by laboratory supervisor and ORC or approved designate signature.
Total residual chlorine of the effluent toxicity sample must be measured and reported if chlorine is employed for
disinfection of the waste stream.
Should there be no discharge of flow from the facility during a month in which toxicity monitoring is required, the
permittee will complete the information located at the top of the aquatic toxicity (AT) test form indicating the facility
name, permit number, pipe number, county, and the month/year of the report with the notation of "No Flow" in the
comment area of the form. The report shall be submitted to the Environmental Sciences Branch at the address cited
above.
Should the permittee fail to monitor during a month in which toxicity monitoring is required, monitoring *ill 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.

DEC-13-2201 16:59 FROM DEM WATER QUALITY SECTION TO 89195604479 P.01/01
i. Poste] I oft t et on
LI Fa: Nvte
Aiton
AMENDMENT TO NPDES PERMIT APPLICATION F,�m ` 19 - S60 - 77
,T AJ
DEC 4 2001
Background Pn°"es 9/s • 7.13 - 57:13 xS/
In mid-2001 the U.S. Environmental Protection Agency, which oversees North Carolina's
NPDES permit program, determined that the state's application form for major municipal
dischargers is inadequate. The EPA indicated that the form does not require a summary of the
applicant's wastewater characteristics, as EPA's standard form does, and does not
provide the necessary public record for permit issuance. Since July 2001, EPA has objected to
the issuance of approximately forty permit renewals until thc permittces provide complete
applications.
In recent discussions with the Division of Water Quality, the EPA recently agreed that the
Division may provide the monitoring information on each permittee's behalf rather than require
the facilities to complete new applications. The permittees have already submitted discharge
monitoring reports (DMRs) under thc terms of their NPDES permits, and the Division
can easily produce summaries for each facilty. However, the Division does not have the legal
authority to amend a facility's application; each permittee must give its consent in order for the
Division to submit this information on its behalf. North Carolina will provide a summary of
discharge monitoring reports as additional documentation to ensure the record is complete.
The statement below is designed to give the Division the authority to submit this data on behalf
of the permitter for this one instance. Other than signing the statement below, no further
action will be required on the part of the permit holder. Furthermore, this will not
change the substance of the draft permit already issued by the Division.
PLEASE SIGN AND RETURN THE FOLLOWING STATEMENT AS SOON AS
POSSIBLE. THIS STATEMENT WILL CONSTITUTE AN OFFICIAL PERMIT
AMENDMENT. In order to expedite the renewal of your permit, please fax the signed
form to (919)-733-0719 and send the original to:
NCDENR/DWQ/NPDES UNIT
1617 Mail Service Center crv,
Raleigh, NC 27699-1617 c
r n (yam
c)
Cirri
Certification of Permit Application Amendment
"I certify that this information, to the best of my knowledge and belief, is true, complet
accurate. This information, including any data provided, amends the current applicatio
reissuance of NPDES permit number NC0047597 submitted to the North Carolina De
of Environment and Natural Resources, Division of Water Quality, on August 24, 2000."
Signature of Permit Holder
artnent-----

Re: comments on South Durham Water - NC0047597
Subject: Re: comments on South Durham Water - NC0047597
Date: Mon, 25 Feb 2002 13:43:06 -0500
From: [e-mail]
To: Jackie Nowell <[e-mail]>
thanks for the responses - I'm satisfied. Once the weekly avg ammonia
issue is resolved, we'll be able to send a no comment letter for this.
see you wed. Marshall
1 of 1 2/25/02 2:15 PM

Re: comments on South Durham Water - NC0047597
Subject: Re: comments on South Durham Water - NC0047597
Date: Fri, 22 Feb 2002 12:12:30 -0500
From: Jackie Nowell <[e-mail]>
Organization: NC DENR DWQ
To: [e-mail]
BCC: Dave Goodrich <[e-mail]>
Marshall, in response to your South Durham comments.
Item #1 - No limit for Cd. There were 10 datapoints evaluated for Cd,
based on quarterly data that was submitted. All datapoints were below
detection level of <0.001 mg/1 or <1 ug/1. This data was erroneously
entered in the spreadsheet as < 0.005 mg/1 or <5 ug/1. With the RPA program
entering < data as 1/2 of the value, values of 2.5 ug/1 were input. The
maximum predicted value of 2.5 ug/1 was calculated, was greater than the
allowable concentration of 2 ug/1, and it would appear that an effluent
limit should be given. However, if all the reported values are below
detection level, DWQ determines that Cd is not a parameter of concern,
therefore no limit or monitoring in the NPDES permit would be recommended.
South Durham will continue to monitor quarterly for Cd in the LTMP of the
pretreatment program.
Item #2 - This was an oversight on my part. A mass based limit for TN
should have been included in the draft permit. South Durham has not
received a compliance extension and an annual TN limit of 334,705 #/year
will be placed in the final permit.
Item #3 - After consultation with Dave and Tom, it was determined that the
summer and winter concentration TP limits should remain in the permit
because they are more stringent than an annual average mass based limit by
HB515. These existing concentration limits were given for protection
against localized impacts in the Jordan/Haw River watershed.
Item #4 - resolved by adding "total" to all metals
Please let me know if additional information is needed.
[e-mail] wrote:
> 1. I can't tell from the RPA provided the rationale for why there is
> not a limit for Cd. Pis help me understand this.
> 2. The permit does not contain weekly average limits for total ammonia,
> as required by 40 CFR 122.45(d)(2). I know this is a global issue for
> many NC municipal permits and we are in discussions with Dave to resolve
> this.
> 3. re TN, is the reason this isn't limited is because modeling work for
> Jordan Lake is still ongoing?
> 4. The permit does contain total P conc limits based on House Bill 515,
> but it doesn't contain mass annual average limits as required. I know
> that the permit does indirectly meet that through limiting flow and
> concentration, but to me that isn't implementating what the state law
> says. I have reviewed some Durham permits by Tom Belnick where such
> annual avg mass limits were included.
> 5. 40 CFR 122.45(c) requires that metals in permits be expressed as
> total recoverable, unless another form is appropriate. Why aren't the
> metals in this permit expressed this way?
I of 2 2/25/02 2:37 PM

State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
Michael F. Easley, Governor
William G. Ross, Jr., Secretary
Kerr T. Stevens, Director
MEMORANDUM
To:
From:
Subject:
IINT - 5 2001
D; HNR RAIEIGN
REGIONAI Ot am„
October 3, 2001
Michael Douglas
NC DENR / DEH / Regional Engineer
Raleigh Regional Office
Jacquelyn M. Nowell
NPDES Unit
Review of Draft NPDES Permit NC0047597
South Durham Water Reclamation Facility
Durham County
J
CDENR
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
Please indicate below your agency's position or viewpoint on the draft permit and return this form by November 5,
2001. If you have any questions on the draft permit, please contact me at the telephone number or e-mail address
listed at the bottom of this page.
RESPONSE: (Check one)
Concur with the issuance of this permit provided the facility is operated and maintained properly, the stated effluent limits
re 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:
Signed/(
s. col ? 0 2001
Date (I /
1617 Mail Service Center, Raleigh, North Carolina 27699-1617 919 733-5083, extension 511 (fax) 919 733-0719
VISIT US ON THE INTERNET @ http://h2o.enr.state.nc.us/NPDES Charles.Weaver@ ncmail.net

DENR/ DWQ
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
NPDES No. NC0047597
Facility Information
Applicant/Facility Name:
City of Durham- South Durham Water Reclamation Facility
Applicant Address:
Env. Resources Dept. 101 City Hall Plaza Durham, N.C. 27701
Facility Address:
6605 Farrington Road Durham, N.C.
Permitted Flow
20.0 MGD
Type of Waste:
Domestic and industrial
Facility/Permit Status:
Renewal
Facility Classification
IV
County:
Durham
Miscellaneous
Receiving Stream:
ew Hope Creek
Regional Office:
Raleigh
Stream Classification:
WS-IV NSW
USGS Topo Quad:
D230/Southwest Durham,
N.C. M
303(d) Listed?:
Yes
Permit Writer:
Jackie Nowell
Subbasin:
03-06-05
Date:
September 19, 2001
Drainage Area (mi2):
75
Summer 7Q10 (cfs)
0.15
Winter 7Q 10 (cfs):
2.0
Average Flow (cfs):
77 i
IWC (%):
(,k
/90j CA -
Primary SIC Code:
-4952
SUMMARY OF FACILITY INFORMATION AND WASTELOAD ALLOCATION
The City of Durham has requested renewal of the South Durham Reclamation WWTP. The
20.0-MGD WWTP discharges into New Hope Creek (a tributary to Back Creek), a class WS-IV
NSW stream, in CPF05 subbasin. New Hope Creek is listed on North Carolina's 2000 303(d)
list. It is a low flow stream that was rated not supporting in the 1996 Cape Fear River Basin
management plan. In 1996 the Cape Fear River Basin management plan recommended that no
new discharges should be permitted in this watershed and existing discharges should conduct
an engineering alternatives and economic analysis including connection to a regional facility. If
there were no alternatives, then BOD5 = 5 mg/1, NH3 = 2 mg/1, and DO = 6 mg/1 would be
recommended.
The waste treatment components of the South Durham Water Reclamation Facility are as
follows:
• 2 - Mechanically cleaned Barscreens
• 4 - Long Channel Grit Chambers
• 4 - Primary Clarifiers with grease and scum concentrator
• 2 - Anaerobic tanks for biological phosphorous removal
• 8 - Aeration basins configured for nitrogen removal
• 6 - Final Clarifiers with return activated pump stations
• 4 - flocculation basins with polymer feed system
• 4 - traveling bridge effluent sand filters
• 6 - Ultraviolet disinfection Units
• 4 - Anaerobic digesters
• 2 - Aerobic digesters
• 1 - Gravity Sludge Thickener
• 2 - gravity Belt sludge thickeners
• 2 - blend tanks for blending aerobic and anaerobic sludge before dewatering
• 3 - belt filter presses
• 36 sand drying beds
• 1 - concrete sludge stockpile containment pad
• 2 - reactor clarifiers for sidestream phosphorus removal
• 2 - engine driven blowers
South Durham Water Reclamation Facility Fact Sheet
NPDES Renewal
Page 1

• 4 - electric blowers
• 3 - emergency generators
Durham currently has an active pretreatment program with Long Term Monitoring Program.
There are eight significant industrial users discharging to the system. The facility has an
average industrial flow of 0.240 MGD. The permitted industrial flow is 0.446 MGD.
SIUs - for South Durham WWTP are as follows:
• Servitex - commercial laundry - 0.168 MGD - continuous flow
�•) Technicoat Corporation - electrostatic bake on coating - 0.02 MGD- continuous flow
•� FaireyFinishingPlant- hosierydin and finishing- 0.04 MGD- continuous flow
dying
- • Pifer Industries - electroplated and coated parts - 0.012 MGD - tinuous flow
• IVA - Piedmont Gravure - gravure cylinder (photo engra ' - 0.001 MGD - continuous
flow
• SNP, Inc. - paper coating powder - 0.02 MGD - ntinuous flow **This industry is only
doing dry processing now. Do not have any w to discharge.
UniFirst Corporation- commercial laundry - 0.120 MGD - continuous flow ** Will be coming
on line in fall of year 2000.
• Duke Hospital Laundry- commercial laundry for hospital- 0.150 MGD - continuous flow**
Will be coming on line in fall of year 2000.
Existing Effluent Limits c(�, 20.0 MGD
Qw = 20 MGD
BOD5 = 5 mg/1 (summer)
BOD5 = 7 mg/1 (winter)
NH3 = 1.0 mg/1 (summer)
NH3 = 2.0 mg/1 (winter)
DO = 6 mg/1
TSS = 30 mg/1
Fecal Coliform = 200/ 100m1
TRC = 17 ug/1
pH = 6-9 SU
Total Phosphorus = 0.5 mg/1 (summer)
Total Phosphorus = 2.0 mg/1 (winter)
2/month monitoring for Mercury
Monthly monitoring for copper, and zinc
Chronic Toxicity P/F @ 90%; January April July October
RECEIVING STREAM INFO:
Benthic macroinvertebrate collection data on nearby sites on New Hope Creek;
1) @ SR2220 in Durham County in March 1987 rated a bioclassification of Fair;
2) @ I-40, Durham in October 1985 rated a bioclassification of Fair;
3) @ SR1107 in Durham in July 1998 rated a bioclassification of Fair; this is an
improvement from the October 1985 rating of Poor
The fish community assessment of the Cape Fear River Basin -- @ New Hope Creek @ SR2220
on May 18, 1998 was rated Poor.
The use support rating for the segment of New Hope Creek where South Durham discharges:
From a point 0.3 miles upstream of Durham County SR2220 to a point 0.8 mile downstream of
Durham County SR1107. This is a 24.5 miles segment; 1994 -1998 chemical rating was Fully
supporting, the 1998 benthos rating was Fair, the 1998 fish rating was poor. The Biological
rating was Partially supporting. The use support rating is partially supporting. Problem
parameters listed are fecals and habitat degradation. Major sources are nonpoint and point.
Possible sources are listed as urban runoff and the Durham County South WWTP.
A review of ambient data sampled by the Upper Cape Fear River Basin Association at the
upstream site of New Hope Creek at I-40 and the downstream site of New Hope at SR 1007
(Stagecoach Road). Overall the water quality is compliant with most water quality standards,
however there were some instream exceedances of WQ standards:
• In 26 observations from April 2000 to April 2001, there were five exceedances (19%) of the
turbidity standard of 25 mg/1 for lakes.
South Durham Water Reclamation Facility Fact Sheet
NPDES Renewal
Page 2

• In 32 observations from April 2000 to April 2001, there were three exceedances (9%) of the
dissolved oxygen standard of 5 mg/1.
• In 21 observations from April 2000 to April 2001, there were eight exceedances (38%) of the
manganese standard of 200 mg/1.
• In 25 observations from April 2000 to April 2001, there were two exceedances (8%) of the
nickel standard of 25 mg/1.
• In 26 observations from April 2000 to April 2001, there were six exceedances (23%) of the
fecal coliform standard of 200/ 100m1.
• In 25 observations from April 2000 to April 2001, there was one exceedance (4%) of the
action level of 7 mg/1 for copper and two samples equal to 7 ug/1.
• In 25 observations from April 2000 to April 2001, there were fifteen exceedances (60%) of
the action level of 1 mg/1 for iron.
TOXICITY TESTING:
Current Requirement: Chronic Toxicity P/F @ 90%; January April July October
The South Durham WWTP has consistently passed the toxicity test since 1997. No FAILS
reported to present.
Recommended Requirement: Chronic Toxicity P/F @ 90%; January April July October
COMPLIANCE SUMMARY:
Facility has maintained an excellent compliance record.
For January thru April 2001, Qw = 10.2 MGD (approximately 51% of capacity), BODS=
0.48 mg/1, NH3=0.16 mg/1, TSS=1.3 mg/1, TN=6.6 mg/ and TP=0.37 mg/1.
In 2000, Avg. Qw = 9.95 MGD (approximately 50% of capacity), BOD5=0.91 mg/1, NH3=0.19
mg/1, TSS=1.7 mg/1, TN=7.8 mg/ and TP=0.35 mg/1.
In 1999, Avg. Qw = 10.5 MGD (approximately 53% of capacity), BOD5=0.90 mg/1, NH3=0.10
mg/1, TSS=1.2 mg/1, TN=5.5 mg/ and TP=0.46 mg/1.
In 1998, Avg. Qw = 10.4 MGD (approximately 52% of capacity), BOD5=1.6 mg/1, NH3=0.06
mg/1, TSS=1.0 mg/1, TN=5.4 mg/ and TP=0.52 mg/1.
REASONABLE POTENTIAL ANALYSIS:
Analysis was conducted using daily monitoring report data from 1999, and 2000 and
pretreatment Long Term Monitoring Data from 1999 and 2000. The parameters that were
analyzed were arsenic, cadmium, chromium, copper, cyanide, lead, mercury, nickel, selenium,
silver, zinc, and fluoride.
• A review of mercury data indicated that there is not a reasonable potential for the water
quality standard to be exceeded instream. The 2/month monitoring frequency will be
deleted. Mercury will be monitored during the long term monitoring plan of the
pretreatment program.
• A review of copper and silver data indicated that there is not a reasonable potential for the
action levels to be exceeded instream. The monthly monitoring frequencies will be deleted.
Copper and silver will be monitored during the long term monitoring plan of the
pretreatment program.
• A review of zinc data indicated that there was a reasonable potential for the action level to
be exceeded instream. The monitoring frequency will be increased to 2/month.
• A review of fluoride data indicated that there was a reasonable potential for the water
quality standard to be exceeded instream. A weekly effluent limit of 1809 ug/1 will be
added to the permit.
South Durham Water Reclamation Facility Fact Sheet
NPDES Renewal
Page 3

INSTREAM MONITORING:
Durham is a participant in the Upper Cape Fear River Basin Association and the coordinated
instream monitoring effort. Individual instream monitoring requirements for DO, temperature,
conductivity, and fecal coliform have been waived from the Durham permit, although still listed
on the permit. Will recommend continuation of waiver of instream monitoring for
dissolved oxygen and temperature while South Durham WRF is a member of the Upper
Cape Fear River Basin Association.
PROPOSED CHANGES:
The following modifications have been made to the permit:
• Mercury monitoring has been deleted based on results of reasonable potential
analysis, which indicated that the water quality standard would not be violated. All
46 observations of mercury all below detection level. Mercury will be monitored in
the LTMP.
• Copper monitoring has been deleted based on results of reasonable potential analysis,
which indicated that the State action level would not be violated. There were 26 of
27 observations that were below detection level.
• Silver monitoring has been deleted based on results of reasonable potential analysis,
which indicated that the water quality action level would not be violated. All 27
observations that were below detection level.
• An effluent limit of 1808 ug/1 for fluoride will be added to the permit based on results
of the reasonable potential analysis (8 data points) that indicated that the water
quality standard of 1800 ug/1 could be violated instream.
• Zinc monitoring has been increased to 2/month based on results of the reasonable
potential analysis (26 data points) that indicated that the water quality standard of 50
ug/1 could be violated instream.
PROPOSED SCHEDULE FOR PERMIT ISSUANCE:
Draft Permit to Public Notice: 09/26/2001
Permit Scheduled to Issue: 11/09/2001
Tentative Effective Date: 12 / 01 / 2001
STATE CONTACT:
If you have any questions on any of the above information or on the attached permit, please
contact Jackie Nowell at [phone] ext. 512.
DATE:
South Durham Water Reclamation Facility Fact Sheet
NPDES Renewal
Page 4

Fr4 rZEGIONAL OFFICE COMMENT: " I S {��a{C,f, L (' S �-S A'S
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C P \J Ai per, �w `-ke U. Q d u � P�v�z- C
SPa g- k PA4vi.1 c - / N u A t- < `-1 iL c�- h c .L ( - AO 7 g,‘) .
NAME: /2-(git- DATE: 6 3 (I f 10 [
NPDES SUPERVISOR COMMENT:
NAME: DATE:
%Y 6 Oo 7S ?
South Durham Water Reclamation Facility Fact Sheet
NPDES Renewal
Page 5

Facility Name =
Qw (MGD) =
WWTP Classification
NPDES # =
Receiving Stream
IWC (%) =
Final Results:
ouch Durhams>Iieclntnation Facile
Lilts io e'Ceieek
99.52
Reasonable Potential Summary
Stream Classification
7Q1Os (cfs)=
30Q2 (cfs)
Qavg (cfs)
10
2°
30
4°
=iv
4
Arsenic
Max. Pred Cw
Allowable Cw
:Implementation
2.5 µg/1 !Are all reported values less than?
50.2 µg/1 I Is the detection limit acceptable?
Yes Limit?
Yes ; Monitor?
No
No
:
!Monitoring
'Frequency None
Aluminum
Max. Pred Cw
Allowable Cw
:Implementation
Not a POC µg/I 'Are all reported values less than?
Not a POC µg/I !Is the detection limit acceptable?
Yes Limit?
:Yes , '; Monitor?
No
No
:
'Monitoring
Frequency None
Barium
Max. Pred Cw
Allowable Cw
'Implementation
Not a POC µg/1 jAre all reported values less than?
1004.8 1 'Is the detection limit acceptable?
µg/ p
Yes Limit?
Y , ;r`=' '
;ems> ¢g,,,.�E Monitor?
No
No
I
jMonitoring
None
Benzene
Max. Pred Cw
Allowable Cw
,
,Implementation
Not a POC µg/1 (Are all reported values less than?
3.7 µg/1 'Is the detection limit acceptable?
Yes Limit?
Yes Monitor?
No
No
+Frequency
,
(Monitoring
j Frequency None
Beryllium
Max. Pred Cw
Allowable Cw
:Implementation
Not a POC µg/1 ,Are all reported values less than?
2.5 µg/l !is the detection limit acceptable?
Yes Limit?
Yes Monitor?
No
No
:
'Monitoring
! Frequency None
Carbon Tetrachloride
Max. Pred Cw
Allowable Cw
'Implementation
Not a POC µg/1 :Are all reported values less than?
2.74 µg/l 'Is the detection limit acceptable?
Yes Limit?
Yes Monitor?
No
No
I
jMonitoring
'Frequency None
Cadmium
Max. Pred Cw
Allowable Cw
,Implementation
2.5 µg/1 'Are all reported values less than?
2.0 µg/l jIs the detection limit acceptable?
Yes Limit?
Yes . Monitor?
YIP:*
Yet
sjFrequency
�',:
,
I Monitoring
Weekly
I
1/2 EAV (ndn ?rout)
. , ..
, .... •,
-.
_
a.. _:.
fig(( 1 .
�112 EA,V, Tram)
, ...., ` �°
e'W {
•
, ,._ '�. , 2
g1p1 "lhA:,
1/2 FAV
.:.....
_ ° 42
µg/1 I
Chloride
Max. Pred Cw
Allowable Cw
Implementation
Not a POC mg/L :Are all reported values less than?
251.2 mg/L ,Is the detection limit acceptable?
Yes Limit?
" 'es - Monitor?
No
No
I
:Monitoring
, Frequency None
Chlorinated Benzenes
Max. Pred Cw
Allowable Cw
!Implementation
Not a POC µg/I lAre all reported values less than?
490.5 µg/l :Is the detection limit acceptable?
Yes Limit?
Yes ` `s,` Monitor?
No
No
�
'Monitoring
:Frequency None
Chloroform
Max. Pred Cw
Allowable Cw
'Implementation
Not a POC µg/1 !Are all reported values less than?
Not aPOC µg/l Its the detection limit acceptable?
Yes Limit?
Yes Monitor?
No
No
! Monitoring
'Frequency None

Facility Name =
Qw (MGD) =
1WC (%) =
NPDES # =
Receiving Stream
Final Results:
..
.:!*r
1 =
lj
AM.}r _
M •��
S7..
._. I .:
•-
��
..
.f�Si
c.t. L •u��i' :'
" r r
�r
j..
a3, s,J
war
?t�i±.
eT,e�Fw#t
Reasonable Potential Summary
i
Stream Classification
7Q10s (cfs)=
30Q2 (cfs)
Qavg (cfs)
1°
2°
30
4°
Chromium
Max. Pred Cw
Allowable Cw
:Implementation
2.5 µg/1 ,Are all reported values less than?
50.2 µg/1 Its the detection limit acceptable?
Yes Limit?
Yes. Monitor?
No
No
:
1 Monitoring
!Frequency None
1
1/2 FAV
:
10221µg
.. I
Copper
Max. Pred Cw
Allowable Cw
Implementation
0.5 µg/1 'Are all reported values less than?
7.0 µg/1 !Is the detection limit acceptable?
Yes Limit?
Yes Monitor?
No
No
:
' Monitoring
!Frequency None
'
1
_ 1/2 A�
'. . ..... .. is
,.,...J
r.
i.,a ... ,...
...., ,7.
ifiC l
1/2:FAY
: 5.8
µfin .:
Cyanide
Max. Pred Cw
Allowable Cw
'Implementation
0.5 µg/1 !Are all reported values less than?
5.0 µg/1 'Is the detection limit acceptable?
Yes Limit?
Yes Monitor?
.... ._
No
No
'
1 Monitoring
I Frequency None
I
'
^41
a✓.: 7, • ax .r.4. "
' T.
- , -
-,•
-'t t
r
t-•2.0
of l'f A
1/2 FAV
1 O
µg/l .:'
Dioxin
Max. Pred Cw
Allowable Cw
'Implementation
Not a POC pg/1 !Are all reported values less than?
15.5 pg/1 Its the detection limit acceptable?
Ycs Limit?
Yes . Monitor?
No
No
1
I Monitoring
'Frequency None
Fluoride
Max. Pred Cw
Allowable Cw
:Implementation
2022.9 µg/1 'Are all reported values less than?
1808.7 µg/1 !Is the detection limit acceptable?
No Limit?
:Yes Monitor?
Yes
Yes
i
'Monitoring
!Frequency Weekly
Hexachlorobutadiene
Max. Pred Cw
Allowable Cw
(Implementation
Not a POC µg/1 :Are all reported values less than?
2.9 µg/1 'Is the detection limit acceptable?
Yes Limit?
Yes Monitor?
No
No
I
j Monitoring
'Frequency None
Iron
Max. Pred Cw
Allowable Cw
10;tY
emit-1/4- `
ir
,Implementation
Not a POC 141 'Are all reported values less than?
1.0 µg/1 !Is the detection limit acceptable?
Yes Limit?
Yes Monitor?
No.
No
,
I Monitoring
;Frequency None
Lead
Max. Pred Cw
Allowable Cw
'Implementation
2.5 µg/1 ,Are all reported values less than?
25.1 µg/1 Its the detection limit acceptable?
Yes Limit?
Yes- Monitor?
No
No
'
'Monitoring
!Frequency None
'
1/2:Fay
534
µfill .:. j
i/2 FAV
221"0
µfill ; :
Manganese
Max. Pred Cw
Allowable Cw
'Implementation
Not a POC µg/1 'Are all reported values less than?
201.0 nil !Is the detection limit acceptable?
Yes Limit?
Ye sY ,_ Monitor?
No
No
1
!Monitoring
!Frequency None

Facility Name =
Qw (MGD) =
IWC (%) =
NPDES # =
Receiving Stream
Final Results:
FL, ''''.1' '.
: V. '
' wozatoli_mminire
f j ^t
f
1 ri • !r WA
Reasonable Potential Summary
Stream Classification
7Q10s (cfs)=
30Q2 (cfs)
Qavg (cfs)
J0
kot
2°
30
4°
MBAS
Max. Pred Cw
Allowable Cw
:Implementation
Not a POC µg/1 'Are all reported values less than?
502.4 µg/1 Its the detection limit acceptable?
Yes Limit?
Yes ` Monitor?
No 5 Monitoring
No I Frequency None
Mercury
Max. Pred Cw
Allowable Cw
'Implementation
0.1000 µg/1 :Are all reported values less than?
0.0121 µg/1 'Is the detection limit acceptable?
X Limit?
Yes Monitor?
it '
J :Monitoring
1).8. Alt)' Frequency Weekly
Nickel
Max. Pred Cw
Allowable Cw
!Implementation
5.0 µg/1 'Are all reported values less than?
25.1 µg/1 jIs the detection limit acceptable?
No Limit?
Yes Monitor?
I
No !Monitoring
No i Frequency None
I
1/2 FAQ
r
�.= 2f 1 0
!$/1 f '' ;
1/2 FAV
75.0
AO .: i
Oil & Grease
Max. Pred Cw
Allowable Cw
Implementation
Not a POC mg/L 'Are all reported values less than?
30.1 mg/L :Is the detection limit acceptable?
Yes Limit?
Yes Monitor?
No 'Monitoring
No :Frequency None
PCB
Max. Pred Cw
Allowable Cw
'Implementation
Not a POC µg/I !Are all reported values less than?
0.0058 µg/l Its the detection limit acceptable?
Yes Limit?
Yes , : , Monitor?
No !Monitoring
No 'Frequency None
Phenol
Max. Pred Cw
Allowable Cw
:Implementation
Not a POC µg/l 'Are all reported values less than?
1.0048 µg/1 Its the detection limit acceptable?
Yes Limit?
Yes Monitor?
No 'Monitoring
No 'Frequency None
Silver
Max. Pred Cw
Allowable Cw
IImpeementation
1.0 µg/1 'Are all reported values less than?
0.1 141 'Is the detection limit acceptable?
t Limit?
Yes : Monitor?
I
No 1 Monitoring
".es'. ; Frequency 2/Month
flu
I
1/2 FAV
:
a.2
µg/1 ,::"I
1/2 FAV
ii9
µg/1: ; '':I
Selenium
Max. Pred Cw
Allowable Cw
!Implementation
Not a POC µg/1 :Are all reported values less than?
5.0 µg/l Its the detection limit acceptable?
Yes Limit?
Yes Monitor?
I
No :Monitoring
No I Frequency None
Tetrachloroethane
Max Pred. Cw
Allowable Cw
!Implementation
Not a POC µg/1 lAre all reported values less than?
2.66 µg/l ils the detection limit acceptable?
Yes Limit?
Yes ' Monitor?
i
No 'Monitoring
No :Frequency None
Tetrachloroethylene
Max Pred. Cw
Allowable Cw
'Implementation
Not a POC µg/1 !Are all reported values less than?
3.29 µg/1 lIs the detection limit acceptable?
Yes ' Limit?
Yes , .; Monitor?
i
No !Monitoring
No I Frequency None
Total Dissolved Solids
:Implementation
I

Max Pred. Cw
Allowable Cw
Not a POC mg/L 'Are all reported values less than?
500.0 mg/L !Is the detection limit acceptable?
Yes Limit? No I Monitoring
Yes ; Monitor? No !Frequency done
Facility Name =
Qw (MGD) =
IWC(%) =
NPDES # =
Receiving Stream
Final Results:
a e
jyi.�'
L S4.
��s
r
..F:
OYwr�acan-•'c
.r - `'`v.-
i.�
i.u.,
w�.�.
.k�oRS .a vat _
; � �',�ns,.�: '.4
Reasonable Potential Summary
Stream Classification
7QIOs (cfs)=
30Q2 (cfs)
Qavg (cfs)
1° 2°
30
4°
7:2;
tgra
roo
aa.. spp �11QQ"� yyn.
{ TT�ii jl�p' S
'0.
Toluene
Max. Pred Cw
Allowable Cw
•
'Implementation
Not a POC µg/1 jAre all reported values less than?
10.9 µg/1 'Is the detection limit acceptable?
Yes
Yes
Limit?
Monitor?
No
No
I
:Monitoring
'Frequency None
Triaklyltin
Max. Pred Cw
Allowable Cw
Implementation
Not a POC µg/1 'Are all reported values less than?
0.0 µg/1 jls the detection limit acceptable?
Yes
Yes
Limit?
Monitor?
No
No
'Monitoring
;Frequency None
Trichloroethylene
Max. Pred Cw
Allowable Cw
'Implementation
Not a POC µg/1 ,Are all reported values less than?
5.6 µg/1 Its the detection limit acceptable?
Yes
Yes:_
Limit?
Monitor?
No
No
Monitoring
!Frequency None
Turbidity
Max. Pred Cw
Allowable Cw
'Implementation
Not a POC NTU :Are all reported values less than?
• 50.2 NTU .Is the detection limit acceptable?
Yes
Yes
Limit?
- Monitor?
No
No
I
: Monitoring
1 Frequency None
Vinyl Chloride
Max. Pred Cw
Allowable Cw
Implementation
Not a POC µg/1 Arc all reported values less than?
4.5 µg/1 jls the detection limit acceptable?
Yes
Yes
Limit?
Monitor?
No
No
1
'Monitoring
i Frequency None
Zinc
Max. Pred Cw
Allowable Cw
'Implementation
133.9 µg/1 !Are all reported values less than?
50.2 µg/1 'Is the detection limit acceptable?
No
Yes
Limit?
' " Monitor?
.No
Yes
1
!Monitoring
!Frequency 2/Month
1
1/2 FA'V
...• ...
:
.:.
.,.. . . Xi
It ;..
1/2 FAV
::.
95.0
gel.:; ,;

lJy z77
Z.4 &I.ML

comments on South Durham Water - NC0047597
Subject: comments on South Durham Water - NC0047597
Date: Fri, 08 Feb 2002 11:19:08 -0500
From: [e-mail]
To: [e-mail]
CC: [e-mail], [e-mail],
[e-mail]
1. I can't tell from the RPA provided the rationale for why there is
not a limit for Cd. Pls help me understand this.
2. The permit does not contain weekly average limits for total ammonia,
0v as required by 40 CFR 122.45(d)(2). I know this is a global issue for
0°. many NC municipal permits and we are in discussions with Dave to resolve
this.
ro 3. re TN, is the reason this isn't limited is because modeling work for
Jordan Lake is still ongoing?
4. The permit does contain total P conc limits based on House Bill 515,
but it doesn't contain mass annual average limits as required. I know
that the permit does indirectly meet that through limiting flow and
concentration, but to me that isn't implementating what the state law
says. I have reviewed some Durham permits by Tom Belnick where such
annual avg mass limits were included.
5. 40 CFR 122.45(c) requires that metals in permits be expressed as
total recoverable, unless another form is appropriate. Why aren't the
metals in this permit expressed this way?
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/,O
75', 7, mod✓ 07p
{ r4Je.ovi
d/
c,A4 T //Z/tdQ/
zc) al

Facility Name =
NPDES # =
Qw (MGD) =
7Q10s (cfs)=
1WC (%) =
South Durham Reclamation Facility
NC0047597
20
0.15
99.52
FINAL RESULTS
Cadmium
Max. Pred Cw
Allowable Cw
RESULTS
Std Dev.
Mean
C.V.
Number
of data points
Mull Factor =
Max. Value
Max. Pred Cw
Allowable Cw
0.0000
2.5
0.0000
8
1.00
2.5 µg/l
2.5 µg/1
2.0 µg/1
Parameter
Standard =
Cadmium
2.0
Date n < Actual Data BDL=1/2DL
Jul-99 1 < 5 2.5
Oct-99 2 < 5 2.5
Jan-00 3 < 5 2.5
Apr-00 4 < 5 2.5
Ju1-00 5 < 5 2.5
Oct-00 6 < 5 2.5
Jan-01 7 < 5 2.5
Apr-01 8 < 5 2.5
511'44-01 . 4 04%, u' c l
L/WMA 9// /&t,/
1)4; /4 7', d-

Facility Name =
NPDES # =
Qw (MGD) =
7QIOs (cfs)=
IWC(%) =
Durham South WWTP
NC0047597
20
0.15
99.52
FINAL RESULTS
Cadmium
Max. Pred Cw
Allowable Cw
0.5
2.0
RESULTS
Std Dev.
Mean
C.V.
Number
of data points
Mult Factor =
Max. Value
Max. Pred Cw
Allowable Cw
0
0.5000
0
10
1.00
0.50 µg/1
0.5 µg/l
2.0 µg/1
Parameter =
Standard =
Cadmium
2.0
Date n < BDL=1/2DL Actual Data
JuI-99 1 < 0.5000 1.00
Oct-99 2 < 0.5000 1.00
Jan-01 3 < 0.5000 1.00
Jan-01 4 < 0.5000 1.00
Apr-00 5 < 0.5000 1.00
JuI-00 6 < 0.5000 1.00
Oct-00 7 < 0.5000 1.00
Oct-00 8 < 0.5000 1.00
Jan-01 9 < 0.5000 1.00
Apr-01 10 < 0.5000 1.00
µg/1

NPDES/Non-Discharge Permitting Unit Pretreatment Information Request Fort
NPDES OR NONDISCHARGE PERMITTING UNIT COMPLETES THIS PART:
Date of Request 1/26/01
Facility
Durham (City) South WWTP
Permit #
NC0047597
Region
Raleigh Regional Office
Requestor
Jackie Nowell
Pretreatment A_D Towns- Keyes McGee (ext. 580)
Contact
PRETREATMENT UNIT COMPLETES THIS PART:
Status of Pretreatment Program (circle all that apply)
1) the facility has no SIU's and does have a Division approved Pretreatment Program that isINACTIVE
2) the facility has no SIU's and does not have a Division approved Pretreatment Program
3 the - • - - • • in • a Pretreatment Program
or 2b) is Modified Program with STMP
4) t e a ' ■ . ' - • p a - retreatment Program - Full Modified
5) additional conditions regarding Pretreatment attached or listed below
Row
% Industrial
Domestic
Permitted
2.33
97.7
Actual
1.37
98.63
STMP time frame:
most recent
next cycle
(S) L
T
MP
Pollutant
Check List
POC due to
NPDES/Non-
Discharge
Permft Limit
Required
by EPA'
Required by
503 Sludge**
POC due to SIU"
Site specific POC (Provide Explanation)****
STMP
Frequency at
effluent
4
BOD
4
4
TSS
-1
4
NH3
4
4
Arsenic
4
4
Cadmium
I/
4
4
Chromium
4
4
4
Copper
4
4
4
Cyanide
q
I
Lead
-
-J
-J
Mercury
4
4
Molybdenum
4
I
Nickel
1/
/
Silver
q
I1
Selenium
4
4
Zinc
4
4
4
Fluoride
I/
Total Phosphor
d
*Always in the LTMP
"Only in the LTMP if the POTW land appl es sludge
"' Only in LTMP while the SIU is connected to the POTW
"" Only in LTMP when the pollutant is a specific concern to the POTW (ex -Chlorides for a POTW who accepts Textile waste)
0= Quarterly
M=Monthly
Comments: Bill Sun, City of Durham's Pretreatment Coordinator [tel: [phone]]
sent the LTMP data.
version W23/00
PIRF_Durham City
Revised: August 4, 2000

Effluent LTMP Data for South Durham Water Reclamation Facility (NC0047597)
1 /13/97:
4/14/97
7/7197
10/6/97
1 /12/98,
6/15/98
7/6/98
10/12/98,
1 /11 /99
4/5/99
7/12/99
10/11/99
1 /11 /00
4/3/00
7/10/00
10/23/00
Flow (MGD)
9.92
9.98
9.92
8.51
9.240
10.7
9.13
8.5
9.09
10.53
9.51
10.87
13.23
10.32
8.97
9.36
Boa
1
2
1
1
2
2
1
1
2
2
2
<2
<2
2
8
<2
TSS
1
1
1
<1
<1
1
1
1
<1
1
1
1
1
1
<1
2
NH3
<0.1
<0.1
0.1
<0.05
<0.05
<0.05
<0.05
<0.05
<0.05
<0.05
<0.05
<0.05
<0.05
<0.05
<0.05
<0.05
Cyanide
<0.005
---
<0.005
<0.005
<0.005
<0.005
<0.005
-
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
Fluoride
0.7
0.8
0.9
1.2
0.7
0.4
0.6
1
0.8
0.7
1.1
0.9
0.8
0.87
0.98
0.84
Phosphorus
0.2
1.3
1.3
1.1
0.3
0.2
0.3
1.1
0.17
0.16
0.11
0.88
1.4
0.99
0.26
0.2
Arsenic
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
Cadmium
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
Chromium
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
Copper
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
0.0071
<0.005
<0.005
<0.005
Lead
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
Mercury
<0.0002
<0.0002
<0.0002
<0.0002
<0.0002
<0.0002
<0.0002
<0.0002
<0.0002
<0.0002
<0.0002
<0.0002
<0.0002
<0.0002
<0.0002
<0.0002
Molybdenum
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005.
0.006
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
0.01
0.0069
Nickel
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
' <0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
Selenium
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
<0.005
Silver
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
<0.001
Zinc
0.022
0.036
0.044
0.049
0.045
0.027
0.027
0.062
0.03
0.036
<0.01
0.029
0.058
0.03
0.021
0.04
Concentration = mg/L

S_Durham City Industrial
Permitted and Average Daily Flow From Industries
South Durham Water Relcamation Facility (NC 0047597)
2000
PERMIT LIMIT
Daily Avg.
6 Month
Daily
Industry
Permit #
Flow
Average
Maximum
Duke Hospital Laundry
2015
0
150000
210000
Fairey
2008
15776
28000
42000
IVA-Piedmont
2003
2000
4000
5000
Pifer
2004
1000
7000
12000
Servitex
2006
107380
120000
168000
SNP
2014
0
20000
28000
Technicoat
2013
10192
17000
20000
Unifirst
2016
0
120000
168000
SUM
136348
466000
653000
0 flow = industries under construction or have not started wet process
Flows in gallons
Page 1

Facility Name =
Qw (MGD) =
WWTP Classification
NPDES # =
Receiving Stream
IWC (%) =
South Durham Reclamation Facility
20
4
NC0047597
New Hope Creek
99.52
Reasonable Potential Summary
Stream Classification
7Q10s (cfs)=
30Q2 (cfs)
Qavg (cfs)
1°
2°
30
4°
ws-iv
NSW
0.15
3.6
77
Final Results:
Arsenic
Max. Pred Cw
Allowable Cw
2.5 µg/I
50.2 µg/I
:Implementation
!Are all reported values less than?
lIs the detection limit acceptable?
Yes
Yes
Limit?
Monitor?
No
No
!monitoring
I Frequency None
Aluminum
Max. Pred Cw
Allowable Cw
Not a POC µg/I
Not a POC µg/I
jmmplementation
'Are all reported values less than?
!Is the detection limit acceptable?
Yes
Yes
Limit?
Monitor?
No
No
i Monitoring
'Frequency None
Barium
Max. Pred Cw
Allowable Cw
Not a POC µg/I
1004.8 µg/I
(Implementation
!Are all reported values less than?
GIs the detection limit acceptable?
Yes
Yes
Limit?
Monitor?
No
No
; Monitoring
' Frequency None
Benzene
Max. Pred Cw
Allowable Cw
Not a POC µg/I
3.7 µg/I
Implementation
!Are all reported values less than?
ils the detection limit acceptable?
Yes
Yes
Limit?
Monitor?
No
No
t
I Monitoring
'Frequency None
Beryllium
Max. Pred Cw
Allowable Cw
Not a POC µg/l
2.5 µg/I
iImplementation
.Are all reported values less than?
!Is the detection limit acceptable?
Yes
Yes
Limit?
Monitor?
No
No
, Monitoring
' Frequency None
Carbon Tetrachloride
Max. Pred Cw
Allowable Cw
Not a POC µg/I
2.74 µg/I
(Implementation
jAre all reported values less than?
'Is the detection limit acceptable?
Yes
Yes
Limit?
Monitor?
No
No
: Monitoring
' Frequency None
Cadmium
Max. Pred Cw
Allowable Cw
2.5 µg/I
2.0 µg/1
Implementation
lAre all reported values less than?
iIs the detection limit acceptable?
Yes
Yes
Limit?
Monitor?
Y‘i4
"e
ys
}
I Monitoring
li Frequency Weekly
1/2 FAV (non Trout)
15.0
µg/I
'
1/2 FAV (Trout)
2.1
µg/1
,
1/2 FAV
42
µg/I
1
Chloride
Max. Pred Cw
Allowable Cw
Not a POC mg/L
251.2 mg/L
'Implementation
jAre all reported values less than?
Is the detection limit acceptable?
Yes
Yes
Limit?
Monitor?
NoMonitoring
No
I Frequency None
Chlorinated Benzenes
Max. Pred Cw
Allowable Cw
Not a POC µg/1
490.5 µg/1
'Implementation
'Are all reported values less than?
jIs the detection limit acceptable?
Yes
Yes
Limit?
Monitor?
No
No
'Monitoring
i Frequency None
Chloroform
Max. Pred Cw
Allowable Cw
Not a POC µg/1
Not aPOC µg/I
'Implementation
!Are all reported values less than?
Its the detection limit acceptable?
Yes
Yes
Limit?
Monitor?
No
No
'
I Monitoring
I Frequency None

Facility Name =
Qw (MGD) _
IWC (Y) =
NPDES # =
Receiving Stream
South Durham Reclamation Facility
20
99.52
NC0047597
New Hope Creek
Reasonable Potential Summary
Stream Classification
7Q1os (cfs)=
30Q2 (cfs)
Qavg (cfs)
1° 70 3°
4O
ws-iv
NSW
()
0
0.15
3.6
77
Final Results:
Chromium
Max. Pred Cw
Allowable Cw
2.5 µg/I
50.2 µg/I
ilmplementation
.Are all reported values less than?
!Is the detection limit acceptable?
Yes
Yes
Limit?
Monitor?
No
No
, Monitoring
!Frequency
1
None
1/2 FAV
1022
µg/1
I
Copper
Max. Pred Cw
Allowable Cw
0.5 µg/I
7.0 µg/I
ilmplementation
'Are all reported values less than?
!Is the detection limit acceptable?
Yes
Yes
Limit?
Monitor?
No
No
' Monitoring
! Frequency
None
1/2 FAV
7.3
µg/I
1/2 FAV
5.8
µg/l
i
Cyanide
Max. Pred Cw
Allowable Cw
0.5 µg/1
5.0 µg/I
'Implementation
;Are all reported values less than?
Its the detection limit acceptable?
Yes
Yes
Limit?
Monitor?
No
No
, Monitoring
!Frequency
None
1/2 FAV
22.0
µg/I
1
1/2 FAV
1.0
µg/I
'
Dioxin
Max. Pred Cw
Allowable Cw
Not a POC pg/l
15.5 pg/I
'Implementation
'Are all reported values less than?
Its the detection limit acceptable?
Yes
Yes
Limit?
Monitor?
No
No
!monitoring
!Frequency
None
Fluoride
Max. Pred Cw
Allowable Cw
2022.9 µg/I
1808.7 µg/I
:Implementation
.Are all reported values less than?
!Is the detection limit acceptable?
No
Yes
limit?
Monitor:'
Yes
Yes
i Monitoring
!Frequency
Weekly
I-Iexachlorobutadiene
Max. Pred Cw
Allowable Cw
Not a POC µg/I
2.9 µg/1
I Implementation
:Are all reported values less than?
'Is the detection limit acceptable?
Yes
Yes
Limit?
Monitor?
No
No
1
i Monitoring
, Frequency
None
Iron Twsfy�✓ages
Cic E.E,.l ' rt- mihnd-
Max. Pred Cw
Allowable Cw
Not a POC µg/1
1.0 µg/1
Implementation
'Are all reported values less than?
jis the detection limit acceptable?
Yes
Yes
Limit?
Monitor?
No
No
;
!Monitoring
i Frequency
None
Lead
Max. Pred Cw
Allowable Cw
2.5 µg/1
25.1 µg/1
'Implementation
'Are all reported values less than?
!Is the detection limit acceptable?
Yes
Yes
Limit?
Monitor?
No
No
, Monitoring
I Frequency
1
I
None
1/2 Fay
33.8
µg/1
I
1/2 FAV
221.0
µg/1
I
Manganese
Max. Pred Cw
Allowable Cw
Not a POC µg/1
201.0 µg/1
'Implementation
!Are all reported values less than?
lIs the detection limit acceptable?
Yes
Yes
Limit?
Monitor?
No
No
!Monitoring
I Frequency
None

Facility Name =
Qw (MGD) =
IWC (%) =
NPDES # =
Receiving Stream
Final Results:
South Durham Reclamation Facility
20
99.52
NC0047597
New Hope Creek
Reasonable Potential Summary
Stream Classification
7Q10s (cfs)
30Q2 Ks)
Qavg (cfs )
I°
7o
4°
ws-iv
NSW
0
0
0.15
3.6
77
MBAS
Max. Pred Cw Not a POC µg/l
Allowable Cw 502.4 µg/1
ilmplementation
,Are all reported values less than?
!Is the detection limit acceptable?
Yes
Yes
Limit?
Monitor?
No
No
, Monitoring
I Frequency
None
Mercury
Max. Pred Cw 0.1000 µg/1
Allowable Cw 0.0121 µg/1
[Implementation
;Are all reported values less than?
'Is the detection limit acceptable?
Yes
Yes
Limit?
Monitor?
v tw
) e
Y9s'�`
i Monitoring
' Frequency
Weekly
Nickel
Max. Pred Cw 5.0 µg/1
Allowable Cw 25.1 14/1
!Implementation
lAre all reported values Tess than?
;Is the detection limit acceptable?
No
Yes
Limit?
Monitor?
/
No
No
f
!Monitoring
i Frequency
�
None
1/2 FAV
261.0
µg/1
1/2 FAV
75.0
14/1
!
Oil & Crease
Max. Pred Cw Not a POC mg/L
Allowable Cw 30.1 mg/L
(Implementation
'Are all reported values less than?
:Is the detection limit acceptable?
Yes
Yes
Limit?
Monitor?
No
No
1
i Monitoring
i Frequency
None
PCB
Max. Pred Cw Not a POC WI
Allowable Cw 0.0058 WI
Implementation
!Are all reported values less than?
lIs the detection limit acceptable?
Yes
Yes
Limit?
Monitor?
No
No
!Monitoring
1 Frequency
None
Phenol
Max. Pred Cw Not a POC µg/I
Allowable Cw 1.0048 µg/I
;Implementation
'Are all reported values less than?
!Is the detection limit acceptable?
Yes
Yes
Limit?
Monitor?
No
No
' Monitoring
!Frequency
None
Silver
Max. Pred Cw 1.0 µg/I
Allowable Cw 0.1 µg/I
(Implementation
'Are all reported values less than?
'Is the detection limit acceptable?
.
I ��i(
Yes
Limit?
Monitor?
No
".
Wn
!Monitoring
1 Frequency
I
I
2/Month
1/2 FAV
1.2
41
!
1/2 FAV
1.9
µg/l
1
Selenium
Max. Pred Cw Not a POC µg/1
Allowable Cw 5.0 µg/1
Implementation
'Are all reported values less than?
,Is the detection limit acceptable?
Yes
Yes
Limit?
Monitor?
No
No
:Monitoring
!Frequency
None
Tetrachloroethane
Max Pred. Cw Not a POC µg/I
Allowable Cw 2.66 µg/1
!Implementation
'Are all reported values less than?
the detection limit acceptable?
Yes
Yes
Limit?
Monitor?
No
No
l
I Monitoring
i Frequency
None
Tetrachloroethylene
Max Pred. Cw Not a POC µg/1
Allowable Cw 3.29 µg/1
;Is
Implementation
!Are all reported values less than?
PIs the detection limit acceptable?
Yes
Yes
Limit?
Monitor?
No
No
!Monitoring
I Frequency
None
Total Dissolved Solids
iImplementation

Max Pred. Cw
Allowable Cw
Not a POC mg/L 'Are all reported values less than?
500.0 mg/L !Is the detection limit acceptable?
Yes Limit? No (Monitoring
Yes Monitor? No ! Frequency None
Facility Name =
Qw (MGD) =
IWC (%) =
NPDES # --
Receiving Stream
South Durham Reclamation Facility
20
99.52
NC0047597
New Hope Creek
Reasonable Potential Summary
Stream Classification
7Q10s (cfs)=
30Q2 (cfs)
Qavg (cfs)
/0
30
4°
\VS-iV
NSW
()
0
0.15
3.6
77
Final Results:
Toluene
Max. Pred Cw
Allowable Cw
Not a POC µg/1
10.9 µg/1
(Implementation
Are all reported values less than?
'Is the detection limit acceptable?
Yes
Yes
Limit?
Monitor?
No
No
I
i Monitoring
i Frequency
None
Triaklyltin
Max. Pred Cw
Allowable Cw
Not a POC µg/1
0.0 µg/1
!Implementation
lAre all reported values less than?
jIs the detection limit acceptable?
Yes
Yes
Limit?
Monitor?
No
No
I
I Monitoring
li Frequency
None
Trichloroethylene
Max. Pred Cw
Allowable Cw
Not a POC µg/1
5.6 µg/1
'Implementation
;Are all reported values less than?
Its the detection limit acceptable?
Yes
Yes
Limit?
Monitor?
No
No
'
I Monitoring
I Frequency
None
Turbidity
Max. Pred Cw
Allowable Cw
Not a POC NTU
• 50.2 NTU
!Implementation
iAre all reported values less than?
GIs the detection limit acceptable?
Yes
Yes
Limit?
Monitor?
No
No
I
i Mon itoring
!Frequency
None
Vinyl Chloride
Max. Pred Cw
Allowable Cw
Not a POC µg/1
4.5 µg/1
!Implementation
lAre all reported values less than?
ils the detection limit acceptable?
Yes
Yes
Limit?
Monitor?
No
No
I Monitoring
i Frequency
None
Zinc
Max. Pred Cw
Allowable Cw
133.9 µg/1
50.2 µg/1
'Implementation
!Are all reported values less than?
Its the detection limit acceptable?
No
Yes
Limit?
Monitor?
No
Yes
1
!Monitoring
I Frequency
2/Month
1/2 FAV
67.0
µg/1
1
1/2 FAV
95.0
µg/1

Whole Effluent Toxicity Testing Self -Monitoring Summary February 16, 2001
FACILITY REQUIREMENT YEAR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC
South Durham WRF Perm chr lim: 90%
NC0047597/001 Begin:10/1/1996 Frequency: Q P/F 4 Jan Apr Jul Oct
County: Durham Regina: RRO Subbasin: CPF05
PF: 20.0 Special
7Q10: 0.15 IWC(%)99.s Orden
NonCnmp:Singlc
Y 1997 Late
1998 Pass
1999 Pass
2000 Pass
2001 P4 j5
Pass
Pass - - Pass
Pass - - Pass
Pass - - Pass
Pass - Pass
Pass - -
Pass - -
Pass - -
Pass - -
Southchcm, Inc. Perm chr lim: 90%
NC0086827/001 Begin:12/1/2000 Frequency: Q Jan Apr Jul Oct
County: Durham Region: RRO Subbasin: CPF05
PF: 0.0144 Special
7Q10: 0.0 IWC(%):100 Order:
+ NonComp:Single
1997
1998
1999
2000
2001
Southern States CoopJS.S. Fertilizer Perm chr lim; 3% (grab)
NC0082821/001 Begin:11/1/2000 Frequency: Q Feb May Aug Nov
County: Iredell Region: MRO Subbasin: YADO6
PF: 0.144 special
7Q10: 7.5 IWC(%)-2.89 Order:
+ NonComp:Single
1997 - Pass - - Pass - -- Pass - Pass --
1998 - Pass - - Fall Pass Pass Late Pass
1999 - Pass - - H - -- H - - Pass -
2000 - Pass - - NRM - .-. H - - NR/H -
2001
Southport WWTP Perm 241v p/fac lim: 90%. 1997 - Fail Fail Pass Pass - - Pass --- Pass
NC0021334f00I Begim7/1/1996 Frequency: Q + Feb May Aug Nov NonComp:Single 1998 -- Pass - - Fail Pass - Pass - -- Pass
County: Brunswick Region: WIRO Subbasin: CPF17 1999 -- Pass - - Pass - Pass - - Pass
PF: 0.80 Special 2000 _. at Pass - Pass - - Pau - -- Pass
7Q10: TIDAL IWC(%):NA order: 2001
Sparta WWTP Penn chr lira: 9°/. (New perm 4/12001) 1997 Pass - Pass - - Pass - - Pass - - Pass
NC0026913/00I Begin:1/1/1996 Frequency: Q P/F + Mar Jun Sep Dec NonComp:Single 1996 -. -- Pass - - Pass - - Pass - - Pass
County: Alleghany Region: WSRO Subbasin: NEW03 1999 -- - Pass - -- Pass - Pass - - Pass
PF: 04 Special 2000 _- pass Pass - -- Pass - - Pass
7Q10: 9.9 IWC(%)9.0 Order. 2001
Spindalc WWTP Perm chr lim: 26%; 32%if6MGD Y 1997 - - 66.2 -- >73 - - 53.7 - - 66.2
NC0020664/001 Begin:1/1/1999 Frequency: Q P/F + Mar Jun Sep Dec NonComp:SINGLE 1998 - - 29.6 - - 29.6 - - <24 49.0 - 49.0
County: Rutherford Region: ARO Subbasin: BRD02 1999 - - 31.0 - - 49 31 -- 53.7 - - 41.9
PF: 4.5 Special 2000 - - 41.9 - - Fail <24 >75,36.1 Pass - - NR
7Q10: 20 IWC(%):26 order: 2001
Spring Lake WWTP Perm chr lim: 5.5% 1997 - Pass - - Pass - - Pass - - Pass
NC0030970/00I Begin:9/I/1996 Frequency: Q P/F + Feb May Aug Nov NonComp:Single 1998 - Pass - - Pass - - Pass - - Pass
County. Cumberland Region: FRO Subbasin: CPFI4 1999 - Pass - - Pass - - P865 - - Pass
PF: 1.5 Special 2000 - Pass -- Pass - - Pass - - Pass
7Q10: 40.0 IWC(%)5.5 order 2001
Springs Industries Penn 24hr prfac lint 90% flld
NC0005754/001 Begim12/1/1999 Frequency: Q P/F + Jan Apr Jul Oct
County: Scotland Region: FRO Subbasin: LUMSS
PF: 0.03 Special
7010: 34.0 1WC(%)0.14 Order.
+ NonComp:Single
1997 Pass - - Pass -- - Pass - - Pass -
1998 Pass - -- Pass - - Pass - - Fail Pass --
1999 Pau - - Pass - - Pass - - Pass - -
2000 Pass - - Pass Pass - Pass -- - Pass - -
2001
Spruce Pine W WTP Perm chr lim: 6.6% I' 1997 - Pass -- - Pass - - Pass - - Pass
NC0021423/001 Begin:7/1/1997 Frequency: Q P/F + Feb May Aug Nov + NonComp:Single 1998 - Pass - - Pass - - Pass - Pau
County: Mitchell Region: ARO Subbasin: FR606 1999 - Pass - Pass - Pass - Pass
PF: 2.0 Special 2000 _- Pass - - Pass - - Pass - Pass
7Q10: 44.0 IWC(%):6.6 Order: 2001
Square D-Phase I Penn chr lim: 14%; upon exp to 0.0432 MGD chr lim 25%(Gmb 1997 - Pass - - Pass -- - Poss. - Late
NC0081540/001 Begin:8/1/1997 Frequency: Q P/F + Feb May Aug Nov + NonComp:Single 1998 - Pass - - P865 - - Pass - Pass
County: Wake Region: RRO Subbasin: NEU02 1999 - Pass - Pass - - Pass - Pass
PF: 0.021 Special 2000 - Pau -- Pass - - Pass -- - Pass
7Q10: 0.20 IWC(%):14 Order. 2001
Pass
Stanley WWTP Perm chr lim: 74%; if PF 1.0 chr lim 79% Y 1997 Pass - - Pass - - Pass - - Pass - -
N00020036/001 Begin:8/1/1995 Frequency: Q P/F + Jan Apr Jul Oct NonComp:Single 1998 Pass - - Pass - - Fail Pass - Fa:,Pass - -
Counly: Gaston Region: MRO Subbasin: Cf1J35 1999 Pau - - Fail Fail Fail 79.3 <40 >I00 79.3 - --
PF: 0.5 Special 2000 pass - - Pass - - Fail 94.9 35.4 >100 - -
7Q10: 0.27 IWC(%):74 Order: 2001
4 Pre 1997 Data Available
LEGEND:
PERM = Permit Requirement LET = Administrative Letter- Target Frequency = Monitoring frequency: Q- Quarterly; M- Monthly; BM- Bimonthly; SA- Semiannually; A- Annually; OWD- Only when discharging; D- Discontinued monitoring requirement
Begin = First month required 7Q10 = Receiving stream low flow criterion (cfs) + = quarterly monitoring increases to monthly upon failure or NR Months that testing must occur - ex. Jan, Apr, Jul, Oct NonComp = Current Compliance Requirement
PF = Permitted flow (MGD) IWC% = Instream waste concentration P/F = Pass/Fail test AC = Acute CHR = Chronic
Data Notation: f - Fathead Minnow; • - Ceriodaphnia sp.; my - Mysid shrimp; ChV - Chronic value; P - Mortality of stated percentage at highest concentration; at - Performed by DWQ Aquatic Tox Unit; bt - Bad test
Repotting Notation: -- = Data not required; NR - Not reported Facility Activity Status: I - Inactive. N - Newly lssued(To construct); H - Active but not discharging; t-More data available for month in question; • = ORC signature needed
42

u
T)
cc
c
Cii c
al V1Seu 9n5
STORET Station ID
15
TEMPERATURE (degrees C) [000101
TURBIDITY (NTU) [00076]
SPECIFIC COND. (umhos/cm @) [00095]
DISSOLVED 02 (mg/L) [00300]
PH (SU) [00400]
TSS [mg/L] [00530]
AMMONIA NITROGEN (mg/L) [00610]
TKN (mg/L) [00625]
NITRATE/NITRITE (mg/L) [00630]
PHOSPHOROUS,TOTL (mg/L) [00665]
ARSENIC, TOTAL (ug/L) [01002]
CADMIUM, TOTAL (ug/L) [01027]
CHROMIUM, TOTAL (ug/L) [01034]
COPPER, TOTAL (ug/L) [010421
IRON, TOTAL (ug/L) [01045]
LEAD, TOTAL (ug/L) [01051]
MANGANESE, TOTAL (ug/L) [01055]
NICKEL, TOTAL (ug/L) [01067]
ZINC, TOTAL [ug/L] [01092]
ALUMINUM, TOTAL (ug/L) [01105]
FECAL COLIFORM (CFU/100 mL) [31613]
MERCURY, TOTAL (ug/L) [71900]
19
5
B3020000
4/05/01
12
25
84.6
8.06
6.92
6.0
0.04
0.5
0.20
0.02
<5
<0.04
1.8
2.5
1,200
0.6
100
<2.0
7.9
620
58
<0.2
20
5
B3040000
4/05/01
12.7
32.
133
7.86
6.96
16.0
0.03
0.6
0.78
0.07
<5
<0.04
1.5
3.3
1,300
• 1.1
98
<2.0
12
880
42
<0.2
19
5
B3020000
3/14/01
13
13
157
7.93
7.34
30.0
0.04
0.4
0.12
0.03
<5
<0.04
5.9
2.8
;' 1,400
1.5
180
4.9
5.8
320
78
<0.2
20
5
83040000
3/14/01
15
.38.'
246
8.30
7.37
34.0
0.05
0.7
2.2
0.14
<5
0.11
13
3.5
11,6004.
2.1
;'220• %
33
17
720
40
<0.2
19
5
B3020000
2/15/01
9.7
13
171
8.9
7.27
9.5
<0.01
0.7
0.15
0.02
<5
0.07
2.8
4
1,100
1.3
160
2
5
290
74
<0.2
20
5
B3040000
2/15/01
12.2
9.5
265
8.94
7.30
6.0
<0.01
0.8
2.12
0.07
<5
0.05
2.4
7
770
1.0
66
2
23
250
86
<0.2
19
5
B3020000
1/17/01
5.1
7.5
169.4
10.95
7.60
3.5
0.02
0.3
0.03
0.05
<5
<0.04
<0.7
<2
910
<0.2
190
<2
<5
80
6
<0.2
20
5
B3040000
1/17/01
10.3
6.6
352
9.78
7.45
4.5
0.04
1.1
5.86
0.14
<5
0.04
<0.7
<2
310
<0.2
60
<2
37
80
182
<0.2
.qg.
4-
B-2450000
4/25/00
18
14
113.5
7.37
7.08
12.5
U' -.
U'
U"
012
19
19
5
5
63020000
B3020000
4/26/00
5/04/00
13
20.2
17
135.9
133.7
7.36
436'1
6.80
6.87
30.0
10.0
U'
U'
U'
U'
U'
U'
0.10
0.17
<5
<5
0.05
0.07
<0.7
2.4
3
3
2000
-
v2500
36--
2.4
1.5
C30C
!1200'.
4
5
6
<5
680
960
190
60
<0.2
<0.2
20
5
B3040000
5/04/00
21.3
21
201.2
6.72
7.25
33.0
U'
U'
U'
0.22
<5
0.06
3.1
4
2000
2.1
310.
5
9
850
62
<0.2
19 5 63020000 5/18/00 22.8
20 5 B3040000 5/18/00 23.8
126.1 5.71 7.20
286.6 6.56 7.46
19
5
B3020000
6/05/00
22.0
9.8
146.3
5.23
6.97
24.0
9'
U'
U'
0.02
<5
0.06
1.5
3
1900,
2.2
(340
<2
5
510
120
<0.2
20
5
63040000
6/05/00
22.7
5.0
279.5
6.12
7.17
26.0
U'
U'
U'
0.09
<5
0.06
1.7
3
. 1200 !
2.1
230 ,
3
14
600
180
<0.2
19
5
B3020000
6/19/00
26.7
149.7
5.12
7 22
20
5
B3040000
6/19/00
29.1
342.9
6.37
7.50
19
5
B3020000
7/06/00
26.3
11
149.3
, 4.84
6.87
24.0
U'
U"
U'
0.05
<5
<0.04
<0.7
3
1800
1.9
270
<2
<5
570
560'
<0.2
20
5
83040000
7/06/00
27.7
7.1
318.4
6.86
7.41
12.0
U'
U'
U'
0.27
<5
0.11
<0.7
2
780
0.7
150
<2
12
360
i, 370)
<0.2
19 5 B3020000 7/19/00 26.5
147.3
20
5
B3040000 7/19/00
29.4
359.3
3.93) 6.85
7.95
7.11

Station Ref 11
19
Sub Basin ID
5
STORET Station ID
B3020000
8/02/00
TEMPERATURE (degfees C) [00010]
24.6
SPECIFIC COND. (umhos/cm @) [00095]
85.6
DISSOLVED 02 (mg/L) [00300]
5.46
PH [SU] [00400]
6.23
TSS [mg/L] [00530]
50.0
AMMONIA NITROGEN (mg/L) [00610]
U`
TKN (mg/L) [00625]
07
NITRATE/NITRITE (mg/L] [00630]
PHOSPHOROUS,TOTL (mg/L] [00665]
0.02
[ARSENIC, TOTAL (ug/L) [01002]
CADMIUM, TOTAL (ug/L) [01027]
<5 <0.04
CHROMIUM, TOTAL [ug/L) [01034]
5.2
C7)
c2800
LEAD, TOTAL (ug/L) [01051]
7
MANGANESE. TOTAL [ug/L] [01055]
140
NICKEL. TOTAL (ug/L) [01067]
2
ZINC, TOTAL (ug/L) [01092]
13
0
O
ALUMINUM, TOTAL [ug/L)
2300
FECAL COLIFORM [CFU/100 mL] [31613]
>6,000
MERCURY, TOTAL fug/L) [71900]
<0.2
20
5
B3040000
8/02/00
24.2
120:
93.6
5.40
6.51
78.0
U'
0.8
U`
0.20
<5 0.08
8.5
12
'4800'
8.9
180
6
26
5500
>12,000'
<0.2 li
19
5
B3020000
8/21/00
21.1
150.9
6.16
7.31
20 5 B3040000 8/21/00 24.0
342.9 6.88 7.43
19
5
B3020000
9/06/00
20.3
24
132.3
6.39
6.97
23
U'
U'
U`
0.11
<5
<0.04
<0.7
2
2100 '
2.4
170
<2
5
780
i 500'
<0.2
20
5
B3040000
9/06/00
23.4
22
214.5
6.38
7.62
30
U`
U*
U'
0.17
<5
<0.04
3.3
5
1800`
2.8
160
3
10
1000
740 ".
<0.2
19 5 B3020000 9/20/00 21.2
157.6 5.75 6.79
20
5
B3040000
9/20/00
23.5
282.8
6.78
7.23
19
5
83020000
10/10/00
12.3
3.6
164.3
5.82
6.57
4.0
0.02
1.0
NR
0.11
<5
<0.04
<0.7
4
630
0.7
150
4
6
100
88
<0.2
20
5
B3040000
10/ 10/00
17.9
3.5
360.7
8.45
7.53
12.0
0.04
0.5
NR
0.14
<5
<0.04
<0.7
2
430
0.6
96
3
21
140
42
<0.2
19
5
B3020000
11/20/00
6.9
5.4
181
8.23
7.43
8.0
0.05
0.6
0.02
0.06
<5
<0.04
<0.7
4
720
0.7
260J
<2
<5
80
191
<0.2
20
5
B3040000
11/20/00
13.5
4.3
395
7.85
7.37
2.0
0.01
1.1
5.31
0.53
<5
<0.04
<0.7
3
280
0.4
84
2
32
150
153
<0.2
19
5
B3020000
12/05/00
6.4
8.1
167
7.78
7.25
3.0
0.03
0.3
0.03
<0.01
<5
<0.04
<0.7
3
730
0.4
180
2
<5
<50
17
<0.2
20
5
83040000
12/05/00
10.8
5.3
341
7.44
7.31
2.0
0.04
0.9
4.34
0.09
<5
0.07
19
3
330
0.7
69
80
24
50
36
<0.2
Station 19 - New Hope Cr. upstream of Durham V V TP
Station 20 - New Hope Cr. @ SR1007 (Stagecoach Rd.)

Reasonable Potential Request Form
Facility Name
,)u/I 44n i4 Wwil"
NPDES Number
Ak oo i7$7 7
Permitted Flow Rate (MGD)
,2 6.e/4 Gd
7Q10 Stream Flow (cfs)
hicli
Receiving Stream
If' f t..,,, , Cer-eic,
Stream Classification
r,
c NsLA/
30Q2 Stream Flow (cfs)
3. b
Average Stream Flow (Qavg) (cfs)
77
Date Requested: 4/ii/a /
Projected Date for Completion (add one week to date requested):
Requested Parameters (Spell out): Al&z7 —cojery H
$; lvs,, — A 9
•
,4vwlc , A
corimiu"1
64fIN,EIw G r"
tcppuie
-r N r
6//7/0/

AFFIDAVIT OF PUBLICATION
State of North Carolina
County of Durham
Donna B. Minor being duly sworn says that she is the
Principal Clerk of The Durham Herald Co., Inc., publishers
of The Herald -Sun, a newspaper published in and of general
circulation in said County, and that a notice of which the
annexed is a true copy, was published in said newspaper one
time on the 8th day of October, 2001.
Principal Clerk
Sworn to and subscribed before me this 9th day of October,
2001.
My commission expires December 16, 2001.
Durham County, North Carolina
`
r;:aiiililk
'PUBLIC NOTICE
STATE OF
NORTH CAROLINA
ENVIRONMENTAL
MANAGEMENT
COMMISSION/
NPDES UNIT
1617 MAIL SERVICE '
CENTER
RALEIGH, NC
27699-1617
NOTIFICATION OF
INTENT TO ISSUE A
NPDES WASTEWATER
PERMIT
On the basis of thorough
staff review and applica-
tion of NC General Stat-
ute 143.21, Public law 92-
500 and other lawful
standards and regulations
, the North Carolina Envi-
ronmental Management
Commission proposes to
issue a National Pollutant
Discharge Elimination Sys-
tem (NPDES) wastewater
discharge permit to the
person(s) listed on the at-
tached pages effective 45
doys from he publish date
of this notice.
Written comments regard-
ing the proposed permit
will be accepted until 30
doys after the publish
date of this notice. All
comments received prior
to that dote are consid-
ered in the final determi-
nation regarding the pro-
posed permit. The Direc-
tor of the NC Division of
Water Quality may decide
to hold a public meeting
for the proposed permit
should -the Division re-
ceive o significant degree
of public interest.
Copies of the draft permit
and other supporting infor-
mation on file used to de-
termine conditions pres-
ent in the draft permit are
available upon request
and payment of the costs
of reproductions. Mail
comments and/or re-
quests for informotion to
the NC Division of Water
Quality at the above ad-
dress or call Ms. Christie
Jackson at (919) 733-
5083, extension 538.
Please include the NPDES
Permit number (attached)
in any communication. In-
terested persons may also
visit the Division of Water
Quality at 512 N. Salis-
bury Street, Raleigh, NC
27604-1148 between the
hours of 8:00 a.m. and
5:00 p.m. to receive infor-
mation on file.
NPDES Permit Number
NC0047597, City of
Durham -South Durham
Water Reclamation Facili-
ty, 101 City Hall Plaza,
Durham, NC 27701 has
applied for a permit re-
newal for o facility located
in Durham County dis-
charging treated wastewa-
ter into New Hope Creek
in the Cape Fear River Ba-
sin. Currently BOD5
NH3, TSS, DO, Fecal
Coliform, total residual
chlorine, total phosphorus
and fluoride are water
quality limited. This dis-
charge may affect future
allocations in this portion
of the receiving stream.
H-S: October 8, 2001

OCT-17-01 13:23 FROM:WATER MGMT DIV REG4
ID:404 562 9316
PAGE 1/3
facsimile
TRANSMITTAL
REGION 4
z ATLANTA FEDERAL CENTER
61 Forsyth Street
o�' Atlanta, GA 30303-896044 PRO -CS
Name: • Cole ullins
Organization: DEQ
Fax: [phone]
Phone: [phone] x-550
From: Beverly Banister
Date: October 17, 2001
Subject: Interim Objection Letter
Pages: • 3 (including cover)
Comments:
►tea
(1,1,
iv
tt
Please call Becky Cover at 404-562-9322, if you experience any problems with tb.i.s fax
transmission. Thanks

OCT-17-01 13.23 FROM:WATER MGMT DIV REG4 ID$404 562 831e PAGE 3/3
4
00 674,4 UNi'i i f) STATES ENVIRONMENTAL ENTAL PROTECTION AGENCY
-tom ATL ANTA FERAL CENTER61 �`ORSY X MEET
r 4. ATLANTA,GEORGTh 30303
RI. mole
Ms. Coleen Sullins, Chief
Water Quality Section
North Carolina Department of Environment and Natural Resources
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
SUSS: NC0047597 - South Durham Water Reclamation Facility
Dear Ms. Sufis:
We have received the North Carolina Dept of Environment and Natural Resources
(NC DEER) National Pollutant Discharge Elimination System (NPDES) draft permit for the
referenced municipal facility. At this tiine, EPA is unable to complete its review of this draft
permit because the related permit application does not sufficiently characterize the effluent quality
of the proposed discharge. Therefore, the information provided is inadequate to determine
whether the draft permit meets the guidelines and requirements of the Clean Water Act.
Section 123.25(a) of Title 40 of the Code of Federal Regulations (C.F.R.) provides that
permit applications used by the State must require, at a z ainimum, the same information required
in the pertinent EPA application forms. The information as required on pages It 6, 17 and If-8
of EPA Standard Fo1731 A was not provided. EPA requests that the State or permittee provide
expanded effluent testing data for each applicable outfall for which permit coverage is sought.
This request is made pursuant to 40 C.F.R- § 123.44(dX2) and the NC/EPA State NPDES
Progam Memorandum of Agreement (IVMOA) and thus constitutes an interim objection to
issuance -of this permit. Upon receipt of the complete application materials, EPA will complete its
review.
If you have any questions, please do not hesitate to contact me or Ms. Caroline Bji.mofor
of my staff, at 404-562-9309 or [e-mail].
Sincerely,
Beverly H. Banister, Director
Water Management Division
ce: Dave Goodrich, NC DENR, Division of Water Quality, NPDES Unit
Bill Reid, NC DENR, Division of Water Quality, Point Source Branch
Kevin B. Smith, Senior Attorney, Office of Legal Support, EPA Region 4
A. Terry Rolm, City of Durham

DURHAM
1 8 6 9
CITY OF MEDICINE
August 23, 2000
Mr. Dave Goodrich
Department of Environment and Natural Resources
Water Quality NPDES Permitting
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
Dear Mr. Goodrich:
City of Durham
North Carolina
Environmental Resources Department
101 City Hall Plaza
Durham, NC 27701
[phone] FAX [phone]
Enclosed please find one original and two copies of the NC DENR/DWQ/NPDES Permit
Application - Standard Form A, for the South Durham Water Reclamation Facility,
NC0047597. The existing permit will expire on February 28, 2001. If you have any
questions, please call me at 919-560-4386.
Sincerely,
Robert Dodson
Superintendent
Enclosure
cc: A. T. Rolan
AN EQUAL OPPORTUNITY/AFFIRMATIVE ACTION EMPLOYER

South Durham Water Reclamation Facility
The South Durham Water Reclamation Facility was originally built in 1984 as a 10 MGD
activated sludge facility. In 1990, the facility was upgraded to include processes for
chemical and biological phosphorous removal in addition to belt filter presses for sludge
dewatering. Traveling bridge effluent filters were also added to improve effluent quality.
In 1994, the facility was expanded to 20 MGD and upgraded to include biological nutrient
removal, gravity belt thickeners, ultraviolet disinfection, odor scrubbing and a computer
control system. Primary sludges are digested in two (2) anaerobic digesters that are
operated in the mesophillic range. All gas from the digesters is used on -site to drive
engines coupled to blowers for the activated sludge process. Hot water off the engines is
than used to heat the digesters in addition to the main control building. Waste activated
sludge is digested aerobically. Construction should be complete in the Fall of 2000 of two
additional anaerobic digesters. Once all anaerobic digesters are available, all sludge will be
digested anaerobically. All the digested sludge is land applied as a Class B product.
The South Durham facility is home to the Water and Wastewater Laboratory. This
laboratory runs all analyses for two (2) water and two (2) wastewater treatment plants.
No other construction is planned in the next five years.
The installed wastewater treatment components are as follows:
2 - Mechanically Cleaned Barscreens
4 - Long Channel Grit Chambers
4 - Primary Clarifiers with Grease and Scum Concentrator
2 - Anaerobic Tanks for Biological Phosphorous Removal
8 - Aeration Basins Configured for Nitrogen Removal
6 - Final Clarifiers with Return Activated Pump Stations
4 - Flocculation Basins with Polymer Feed System
4 - Traveling Bridge Effluent Sand Filters
6 - Ultraviolet Disinfection Units
4 - Anaerobic Digesters
2 - Aerobic Digesters
1 - Gravity Sludge Thickener
2 - Gravity Belt Sludge Thickeners
2 - Blend Tanks for Blending Aerobic and Anaerobic Sludges before
Dewatering
3 - Belt Filter Presses
36 - Sand Drying Beds
1 - Concrete Sludge Stockpile Containment Pad
2 - Reactor Clarifiers for Sidestream Phosphorous Removal
2 - Engine Driven Blowers
4 - Electric Blowers
3 - Emergency Generators
See Attached for Sizes and Capacities

SOUTH DURHAM WRF
DESIGN DATA
20 MGD DESIGN CAPACITY
Influent Pump Station
Influent Bar Screens
Number
Clear opening between bars
Method of cleaning
Influent Pumps
Number
Capacity range of each pump
Total dynamic head at maximum capacity
Motor horsepower
Grit Collectors
Number
Capacity of each unit
Type
Method of velocity control
Method of cleaning
Primary Settling Basins
Number
Dimensions of each basin
Length
Width
Average depth
Total surface area
Surface overflow rate at design flow
Volume of each basin
Total volume
Detention time at design flow
Primary Solids Pumps
Number
Capacity of each pump
Total dynamic head
Horsepower
Scum Handling Facilities
Scum Pumps
Number
Capacity of each pump
Total dynamic head
Horsepower
2
3/4 inch
Mechanical
(with Timer Control)
4
6.8 to 23 mgd
50 ft.
250
4
Approximately 15 mgd
Horizontal flow,
velocity control
Parshall flume
Mechanical
4
98 ft.
40 ft.
10.5 ft.
_ 15,680 ft.2
1,275 gpd/ft.2
0.31 mil. gal.
1.23 mil. gal.
1.5 hrs.
4
125 gpm
35 ft.
10
2
150 gpm
25 ft.
3

Primary Settling Basins (continued)
Scum Concentrator
Number 1
Maximum flow rate 150 gpm
Influent solids concentration
(by weight) 1 - 2%
Anoxic Tanks (Anaerobic Zone).
Number 2
Dimensions of each tank
Length 240 ft.
Width 30 ft.
Depth Approximately 15.25 ft.
Volume of each tank 0.82 mil. gal.
Total volume 1.64 mil. gal.
Detention time at design flow 2.0 hours
Aeration Basins
Number 8
Dimensions of each basin
Length 304 ft.
Width 4 @ 50 ft.
4 @ 75 ft.
Depth 15 ft.
Volume of each basin 4 @ 1.71 mil. gal.
4 @ 2.56 mil. gal.
Total volume 17.1 mil. gal.
Total detention time at design flow 20.5 hours
First Anoxic Zone
Length 51 ft.
Total volume 2.86 mil. gal.
Total detention time at design flow 3.4 hours
Aerobic Zone
Length 190 ft.
Total volume 1 :66 mil. gal.
Detention time at design flow ff.8 hours
Second Anoxic Zone
Length 51 ft.
Total volume 2.86 mil. gal.
Detention time at design flow 3.4 hours
Reaeration Zone
Length 12 ft.
Total volume 0.67 mil. gal.
Detention time at design flow 0.8 hours

Mixing/Aeration Systems
a) Mixing System
Type
Number of header systems in each aeration basin
Total number of header systems
Number of nozzles per header
Number of pumps per basin
Total number of pumps
Capacity of each pump
Jet nozzle
5
40
4@10
4@ 14
7
56
28 @ 2.9 mgd
28 @ 3.8 mgd
b) Aeration systems
Type Fine bubble diffused air, disc -type
Number of diffusers
Aeration zone
Reaeration zone
Total
4 @ 794
4@ 1,100
4@44
4 @ 96
8,136
c) Recirculation System
Number of pumps per basin 4
Total number of pumps 32
Capacity of each pump 4 @ 3.1 mgd
12 @ 3.0 mgd
4 @ 3.9 mgd
12 @ 5 mgd
d) Blowers
Engine -Driven Blowers
Number 2
Maximum capacity of each blower 8,850 icfm
Motor -Driven Blowers
Number 4
Capacity of each blower 2 @ 6,700 icfm
2@7,900icfm
Final Clarifiers
Number 6
Diameter 4 @ 80 ft.
2 @ 120 ft.
Total surface area 42,730 ft.2
Surface overflow rate at design flow 470 gpd/ft.2
Sidewall water depth 4 @ 16 ft.
2 @ 15.3 ft.
Total volume 5.0 mil. gal.
Detention time at design flow ' 6.0 hours
Type of solids removal system Suction -type
MISCISDURHAM.OWASECTION.1

Return Activated Sludge Pump Stations
Number of pump stations
Total number of pumps
Maximum capacity of each pump
Horsepower
Type of variable speed drive
Flocculation Basins
Number
Dimensions
Length
Width
Depth
Total volume
Detention time at design flow
Rapid Mixers
Number
Horsepower per mixer
Flocculators
Number per basin
Total number
Horsepower per flocculator
Effluent Filters
Number
Type of filters
Dimensions of each filter
Length
Width
Depth of anthracite
Depth of sand
Total surface area
Filtration rate at design flow
Disinfection Facilities
Type
Number of channels
Number of banks per channel
Number of modules oer bank
2
7
2 @ 2,250 gpm
2 @ 2,900 gpm
3 @ 5,000 gpm
4@ 15
3 @ 30
Variable frequency (VFD)
4
70 ft.
15.5 ft.
10.5 ft.
0.34 mil. gal.
24.5 min.
2
15
4
16
1.5
4
Dual -media, traveling
bridge, automatic
backwash type, with air
scour
111.7 ft.
15 ft.
8 in.
8 in.
6,700 ft.2
2.1 gpm/ft.2
Ultraviolet
6
1
20

Effluent Flow Measurement
Type Parshall flume
Throat width 6 ft.
Post Aeration Facilities
Type of post aeration
Height of fall after effluent Parshall flume
Waste Activated Sludge Thickeners
Free fall
8-10ft.
Number 2
Type Gravity belt
Belt width per thickener 2 meters
Maximum feedrate per thickener 500 gpm
Maximum solids loading rate per thickener 2,000 lb./hr.
Anaerobic Digesters (for Primary and Waste Activated Sludoal
Number 2
Dimensions of each digester
Diameter 70 ft.
Sidewall water depth 22.42 ft.
Volume of each digester • 97,840 ft.3
Total volume 195,680 ft.3
Design total solids production
(annual average conditions) 40,670 lb./day
Detention time at design solids production
(40/0 solids) 12 days
Volatile solids loading (75% V.S.) 0.16 lb./ft.3-day
Digested biosolids production (50% VSS destroyed) 25,420 Ib./day
Type of covers Floating
Digester mixing system
Type Expendable piston
pump
Number of mixers per digester 7
Barrel diameter 30 in.
Recirculation pumps
Number 2
Capacity of each pump 410 gpm
Total dynamic head 34 ft.
Horsepower 7-1/2

Anaerobic Digesters Lfor Primary and Waste Activated Sludge) (Continued
Transfer pumps
Number 2
Capacity 1 @ 300 gpm
1 © 200 gpm
Total dynamic head 1 @ 40 ft.
1 @ 48.5 ft.
Horsepower 1 @ 15
1@10
Gas Holder
Number 1
Volume 50,000 ft.3
Aerobic Digesters/Solids Storage Tanks
Number of tanks 2
Dimensions of each tank
Length 70.5 ft.
Width 55 ft.
Depth 16 ft.
Volume of each tank 62,040 ft.3
Total volume 124,080 ft.3
Detention time at design digested biosolids production
(4% solids) 12 days
Aeration system
Diffuser type and pattern Coarse bubble, cross roll
Number of diffusers 280
Aerobic Digester Pump Station
Number of pumps 3
Capacity of each pump 210 gpm
Horsepower 10
Blend Tanks.
Number 2
Diameter 30 ft.
Maximum depth 12 ft.
' Total volume 127,000 gal.
Belt Filter Presses
Number 3
Belt width per press 2 meters
Feed rate per press 60 -140 gpm
Solids loading rate per press 1,600 lb./hr.

Sand Drying Beds
Number
Dimensions
Length
Width
Total area
Digested biosolids loading
Method of biosolids removal
Reactor Clarifiers
Number
Diameter of each unit
Total surface area
Maximum belt filter press filtrate (two presses)
Overflow rate
* Assuming use for biosolids produced over 4 months of the year.
36
135 ft.
48 ft.
233,280 ft.2
13.3 lbJft?-yr*
Front-end loader or
truck -mounted vacuum
2
30 ft.
1,410 ft.2
576,000 gpd
410 gpd/ft.2

FNR/TSU
FBR
PLANT
INFLUENT
BAR
SCREENS
(2)
INFLUENT
PUMP
STATION
CONCENTRATOR
EFFLUENT
GRIT
REMOVAL
FACIUTIES
SCUM
CCNCENTRATOR
LEGEND
RONAL OPERADCN
--- ALTERNATE NPERATIQI
CO DOZSTED DOSODS
Ix DIGESTER CAS
F FLIRATE
FB FLIER BAODIASH
FBR FLIER BACIDFAS1 RETUF N
FE FLIER EFFLUENT
IL 1o_D UCUOR
Y.R _NIXED MUER RE(aNQLATIQN
PE PRIMARY EFFLUENT
PS PRIMARY SCIDS
RAS RETURN ACTIVATED 91DLE
sc scvu
9J 014FSTFR SUPERNATANT
TS 1E10CE N1E0 SEWS
T9J BICKERER SUPERNATANT
UR UFUMAN RETURN
WAS WASTE ACTIVATED SLUDGE
EIPUPS
HEIN SA
SCREENINGS
AND GRIT
TD LANDFILL
ti 4y6lp^y
Environmental Engineers & Scientists
R.LLl1c+. MORTM c•ROUYA
ALUM
irPRIMARY
SETTLING
BASINS
`------
Su
PRIMARY SOUOS
PUMP STATIONS (2)
su
ANoxIC
r TANKS(
(2)
LS
PS L.—J
ANAEROBIC
DIGESTERS
DB
1:1 A'R 0
MLR
AERATION
BASINS
(8)
ALUM
ML
I RAS-35/oFio.a
WAS WAS
CI
L_.(.__ass.p Q.
-�
o
ay
- DG TO ENGINE -DRIVEN BLOWERS
^. 8 o, coo ct�/pad/
FINAL
CLARIFIERS
(6)
ALUM CR
POLYMER
FLOCCULATION
BASINS
(4)
RAS
PUMP
STATIONS
(2)
AEROBIC
DIGESTERS/
SCUDS
TANKS (GEE)
DB
Vow,PnoS Ate. "6A5E15 ON ANINUAL AoEit.Ab-ES.
DS
TSU
EFFLUENT
FILTERS
(4)
0B
F
ULTRAVIOLET
DISINFECTION
F/UR/TSU
EFFLUENT TO
NEW HOPE CREEK to . S%
--- REACTOR
CLARIFIERS
(2)
--ALUM
I
IO0f 4pLs
CA1
3a1ct 8
Op./
IUR
SAND
DRYING
BEDS (36)
BELT
FILTER
PRESSES (3)
rv+ rc
DISPOSAL
SCUDS BY LAND
SJOCKPILE APPUCATICN
AREA
SOUTH DURHAM
WATER RECLAMATION FACILITY
PROCESS FLOW SCHEMATIC
20 MGD DESIGN CAPACITY

NC DENR / DWQ / NPDES PERMIT APPLICATION - STANDARD FORM A
Municipal Facilities with permitted flows > 1 MGD or with pretreatment programs
SECTION 111. INDUSTRIAL WASTE CONTRIBUTION TO MUNICIPAL SYSTEM
Submit a separate Section 111 for each Significant Industrial User.
1. Significant Industrial User (SIU)
An SIU has (or could have) significant impact on the POTW receiving the wastewater or upon the quality of effluent from the receiving POTW.
Specifically, an SIU:
• has a Row of 50,000 gallons or more per average workday;
• has a Row greater than 5 percent of the total flow carried by the municipal system m receiving the waste,. or
• has a toxic material in its discharge.
It may be necessary to alter these administrative criteria in certain cases, such as an instance where two or more contributing industries in
combination can produce an undesirable effect on either the municipal facility or the quality of its effluent.
Name of SIU Servitex, Inc
Street address 1720 Lawson St
City Durham County Durham
State NC Zip Code 27707
Telephone Number ( 919 ) 596-2186
Fax Number ( )
e-mail address
2. Primary Product or Raw Material
Specify either the principal product or the principal raw material and the maximum quantity per day produced or consumed.
Quantities are to be reported in the units of measurement for each SIC category at the facility. SIC categories should use the units of
measurement normally used by that industry.
Product .
Raw Material
Quantity
Units
Commerical laundry
N/A
N/A
N/A
3. Flow
Indicate the volume of water discharged into the POTW and whether this discharge is intermittent or continuous
0.168 MGD
Intermittent ® Continuous
4 of 4-

NC DENR / DWQ / NPDES PERMIT APPLICATION - STANDARD FORM A
Municipal Facilities with permitted flows > 1 MGD or with pretreatment programs
SECTION 11I. INDUSTRIAL WASTE CONTRIBUTION TO MUNICIPAL SYSTEM
Submit a separate Section Ill for each Significant Industrial User.
1.. Significant Industrial User (SIU)
An SIU has (or could have) significant impact on the POTW receiving the wastewater or upon the quality of effluent from the receiving POTW.
Specifically, an SIU:
• has a flow of 50,000 gallons or more per average workday;
• has a flow greater than 5 percent of the total flow carried by the municipal system m receiving the waste,. or
• has a toxic material in its discharge.
It may be necessary to alter these administrative criteria in certain cases, such as an instance where two or more contributing industries in
combination can produce an undesirable effect on either the municipal facility or the quality of its effluent.
Name of SIU Technicoat Corporation
Street address 1669 Cooper St
City Durham
County Durham
State NC Zip Code 27703
Telephone Number
Fax Number
e-mail address
(919 ) 596-1422
2. Primary Product or Raw Material
Specify either the principal product or the principal raw material and the maximum quantity per day produced or consumed.
Quantities are to be reported in the units of measurement for each SIC category at the facility. SIC categories should use the units of
measurement normally used by that industry.
Product
Raw Material
Quantity
Units
Electrostatic bake on
Coating powder
N/A
N/A
coating
-
3. Flow
Indicate the volume of water discharged into the POTW and whether this discharge is intermittent or continuous
0.02 MGD
El Intermittent ® Continuous
4 of 4•

NC DENR / DWQ / NPDES PERMIT APPLICATION - STANDARD FORM A
Municipal Facilities with permitted flows > 1 MGD or with pretreatment programs
SECTION 111. INDUSTRIAL WASTE CONTRIBUTION TO MUNICIPAL SYSTEM
Submit a separate Section 111 for each Significant Industrial User.
1. Significant Industrial User (SIU)
An SIU has (or could have) significant impact on the POTW receiving the wastewater or upon the quality of effluent from the receiving POTW.
Specifically, an SIU:
• has a flow of 50,000 gallons or more per average workday;
• has a flow greater than 5 percent of the total flow carried by the municipal system m receiving the waste,. or
• has a toxic material in its discharge.
It may be necessary to alter these administrative criteria in certain cases, such as an instance where two or more contributing industries in
combination can produce an undesirable effect on either the municipal facility or the quality of its effluent.
Name of SIU Fairey Finishing Plant
Street address 1604 E. Lawson St
City Durham County Durham
State NC Zip Code 27703
Telephone Number
Fax Number
e-mail address
( 919 ) 596-8221
2. Primary Product or Raw Material
Specify either the principal product or the principal raw material and the maximum quantity per day produced or consumed.
Quantities are to be reported in the units of measurement for each SIC category at the facility. SIC categories should use the units of
measurement normally used by that industry.
Product .
Raw Material
Quantity
Units
Hosiery Dying & Finishing
Various dyes
N/A
N/A
3. Flow
Indicate the volume of water discharged into the POTW and whether this discharge is intermittent or continuous
n_n4 MGD
Intermittent ® Continuous
4 of 4•

NC DENR / DWQ / NPDES PERMIT APPLICATION - STANDARD FORM A
Municipal Facilities with permitted flows > 1 NIGD or with pretreatment programs
SECTION 111. INDUSTRIAL WASTE CONTRIBUTION TO MUNICIPAL SYSTEM
Submit a separate Section !!! for each Significant Industrial User.
1. Significant Industrial User (SIU)
An SIU has (or could have) significant impact on the POTW receiving the wastewater or upon the quality of effluent from the receiving POTW.
Specifically, an SIU:
• has a flow of 50,000 gallons or more per average workday;
• has a flow greater than 5 percent of the total flow carried by the municipal system m receiving the waste,. or
• has a toxic material in its discharge.
It may be necessary to alter these administrative criteria in certain cases, such as an instance where two or more contributing industries in
combination can produce an undesirable effect on either the municipal facility or the quality of its effluent.
Name of SIU Pifer Industries
Street address 2210 E. Pettigrew St
City Durham County Durham
State NC Zip Code 27702
Telephone Number
Fax Number
e-mail address
( 919 ) 596-1356
2. Primary Product or Raw Material
Specify either the principal product or the principal raw material and the maximum quantity per day produced or consumed.
Quantities are to be reported in the units of measurement for each SIC category at the facility. SIC categories should use the units of
measurement normally used by that industry.
Product .
Raw Material
Quantity
Units
Electroplated and coated
Copper, Nickel, Zinc
N/A
N/A
parts
and other metals
-
3. FIow
Indicate the volume of water discharged into the POTW and whether this discharge is intermittent or continuous
0.012 MGD
Intermittent ® Continuous
4 of 4•

NC DENR / DWQ / NPDES PERMIT APPLICATION - STANDARD FORM A
Municipal Facilities with permitted flows > 1 MGD or with pretreatment programs
SECTION 111. INDUSTRIAL WASTE CONTRIBUTION TO MUNICIPAL SYSTEM
Submit a separate Section ill for each Significant Industrial User.
1. Significant Industrial User (SIU)
An SIU has (or could have) significant impact on the POTW receiving the wastewater or upon the quality of effluent from the receiving POTW.
Specifically, an SIU:
• has a flow of 50,000 gallons or more per average workday;
• has a flow greater than 5 percent of the total flow carried by the municipal system m receiving the waste,. or
• has a toxic material in its discharge.
It may be necessary to alter these administrative criteria in certain cases, such as an instance where two or more contributing industries in
combination can produce an undesirable effect on either the municipal facility or the quality of its effluent.
Name of SIU IVA — Piedmont Gravure
Street address 1551 Cooper St
City Durham
County Durham
State NC Zip Code 27703
Telephone Number
Fax Number
e-mail address
(919 ) 596-0657
2. Primary Product or Raw Material
Specify either the principal product or the principal raw material and the maximum quantity per day produced or consumed.
Quantities are to be reported in the units of measurement for each SIC category at the facility. SIC categories should use the units of
measurement normally used by that industry.
Product .
Raw Material
Quantity
Units
Gravure cylinder
Copper & Nickel
N/A
N/A
(Photo engraving)
Plating
-
3. Flow
Indicate the volume of water discharged into the POTW and whether this discharge is intermittent or continuous
0.001 MGD
�] Intermittent E] Continuous
4of4•

NC DENR / DWQ / NPDES PERMIT APPLICATION - STANDARD •FORM A
Municipal Facilities with permitted flows > 1 MGD or with pretreatment programs
SECTION 111. INDUSTRIAL WASTE CONTRIBUTION TO MUNICIPAL SYSTEM
Submit a separate Section 111 for each Significant Industrial User.
1. Significant Industrial User (SIU)
An SIU has (or could have) significant impact on the POTW receiving the wastewater or upon the quality of effluent from the receiving POTW.
Specifically, an SIU:
• has a flow of 50,000 gallons or more per average workday;
• has a flow greater than 5 percent of the total flow carried by the municipal system m receiving the waste,. or
• has a toxic material in its discharge.
It may be necessary to alter these administrative criteria in certain cases, such as an instance where two or more contributing industries in
combination can produce an undesirable effect on either the municipal facility or the quality of its effluent.
Name of SIU SNP, Inc
Street address 1304 Briggs Ave, Suite 104
City Durham
State NC
Telephone Number
Fax Number
e-mail address
County Durham
Zip Code 27703
( 919) 598-0400
( 919) 598-4674
2. Primary Product or Raw Material
Specify either the principal product or the principal raw material and the maximum quantity per day produced or consumed.
Quantities are to be reported in the units of measurement for each SIC category at the facility. SIC categories should use the units of
measurement normally used by that industry.
Product
Raw Material
Quantity
Units
Paper coating powder
Alginate
JT/A
N/A
(Seaweed extract)
•
3. Flow
Indicate the volume of water discharged into the POTW and whether this discharge is intermittent or continuous
0.02 MGD
Intermittent © Continuous
* Note: This industry is only doing dry processing now. They loss their art
process line to competitor. Hence they do not have waste discharge.
4 of 4•

NC DENR / DWQ / NPDES PERMIT APPLICATION - STANDARD FORM A
Municipal Facilities with permitted flows > 1 MGD or with pretreatment programs
SECTION 111. INDUSTRIAL WASTE CONTRIBUTION TO MUNICIPAL SYSTEM
Submit a separate Section 111 for each Significant Industrial User.
1. Significant Industrial User (SIU)
An SIU has (or could have) significant impact on the POTW receiving the wastewater or upon the quality of effluent from the receiving POTW.
Specifically, an SIU:
• has a flow of 50,000 gallons or more per average workday;
• has a flow greater than 5 percent of the total flow carried by the municipal system m receiving the waste,. or
• has a toxic material in its discharge.
It may be necessary to alter these administrative criteria in certain cases, such as an instance where two or more contributing industries in
combination can produce an undesirable effect on either the municipal facility or the quality of its effluent.
Name of SIU UniFirst Coroporation
Street address 1409 Person St
City Durham County Durham
State NC Zip Code 27703
Telephone Number
Fax Number
e-mail address
(336 ) 226-0816
2. Primary Product or Raw Material
Specify either the principal product or the principal raw material and the maximum quantity per day produced or consumed.
Quantities are to be reported in the units of measurement for each SIC category at the facility. SIC categories should use the units of
measurement normally used by that industry.
Product .
Raw Material
Quantity
Units
Commerical laundry
Detergent
N/A
N/A
3. Flow
Indicate the volume of water discharged into the POTW and whether this discharge is intermittent or continuous
0.12 MGD
El Intermittent ES Continuous
* Note: Will be coming on line in fall of 2000.
4 of 4•

NC DENR / DWQ / NPDES PERMIT APPLICATION - STANDARD FORM A
Municipal Facilities with permitted flows > 1 MGD or with pretreatment programs
SECTION 111. INDUSTRIAL WASTE CONTRIBUTION TO MUNICIPAL SYSTEM
Submit a separate Section 111 for each Significant Industrial User.
1. Significant Industrial User (SIU)
An SIU has (or could have) significant impact on the POTW receiving the wastewater or upon the quality of effluent from the receiving POTW.
Specifically, an SIU:
• has a flow of 50,000 gallons or more per average workday;
• has a flow greater than 5 percent of the total flow carried by the municipal system m receiving the waste,. or
• has a toxic material in its discharge.
It may be necessary to alter these administrative criteria in certain cases, such as an instance where two or more contributing industries in
combination can produce an undesirable effect on either the municipal facility or the quality of its effluent.
Name of SIU Duke Hospital Laundry
Street address 4 Anson St
City Durham
State NC
Telephone Number
Fax Number
e-mail address
County Durham
Zip Code 27703
( 919) 684-5283
( 919) 681-7391
2. Primary Product or Raw Material
Specify either the principal product or the principal raw material and the maximum quantity per day produced or consumed.
Quantities are to be reported in the units of measurement for each SIC category at the facility. SIC categories should use the units of
measurement normally used by that industry.
Product .
Raw Material
Quantity
Units
Commerical laundry
Detergent
N/A
N/A
for hospital
3. Flow
Indicate the volume of water discharged into the POTW and whether this discharge is intermittent or continuous
0.15 MGD
Intermittent El Continuous
* Note: Will be coming on line in fall of 2000•
4of4•

N} - 0o4-}59 7-
'1 R
SOUTH DURHAM CATER
RECLAMATION FACILITY
CITY OF DURHAM. DEPARTMENT OF WATER RESOURCES
5605 F ARRINGTON ROAD. CHAPEL MILL. NORTH CAROLINA [phone]
The 10 million gallon
per day Farrington Road
Wastewater Treatment
Plant, designed by the
W.M. Piatt Company, was
built as a modern activated
sludge facility in 1984
at a cost of $18,900,000.
Treatment units consisted
of screening and grit
removal, four primary
clarifiers, four activated
sludge basins, four final
clarifiers and chlorine
disinfection. Sludge, the
settleable solids removed
from the wastewater, was
digested through two
anaerobic and two aerobic
digesters before dewatering
on sand drying beds and
final disposal to permitted
land application sites.
All gas from the digestion
process was designed to
be utilized as fuel for the
engine driven blowers that
provide air to the activated
sludge system and heat for
the digesters. Two new
wastewater collection
pipelines were constructed
to the new plant site.
thereby phasing out four
smaller wastewater plants
which were replaced with
pump stations.
In 1990. the treatment
plant was upgraded at a
cost of $8,000,000. The
upgrade included the
addition of two anoxic
tanks and chemical feed
facilities for the biological
and chemical phosphorus
removal systems. A
sludge dewatering facility
with two belt presses
was added for additional
biosolids dewatering.
Effluent sand filters for
improved effluent quality
were also added.
The latest expansion.
designed by Hazen &
Sawyer Engineers, was
completed in 1994. This
project increased the
capacity of the facility
to 20 million gallons per
day. With most all of the
original processes still
in operation, this project
added biological nutrient
removal, gravity belt
sludge thickeners, a third
belt press for dewatering,
ultraviolet disinfection
and a computerized plant
process control system.
Also included in this
project was a facility
expansion to house the
Department's new
centralized laboratory
and the Industrial Waste
Control section. The total
project cost was
$33,000,000.
The facility was
renamed South Durham
Water Reclamation
Facility to emphasize the
high quality of treated
water and the potential for
non -potable applications
of the reclaimed water.

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34
33
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SOUTH DURHAM
WATER RECLAMATION FACILITY
SITE LAYOUT

State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
James B. Hunt, Jr., Governor
Bill Holman, Secretary
Kerr T. Stevens. Director
August 18, 2000
Mr. A. Terry Rolan
City of Durham
101 City Hall Plaza
Durham, NC 27701
AVA
NCDENR
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
Subject: NPDES Permit Modification
Permit NC0047597
South Durham Water Reclamation Facility
Durham County
Dear Mr. Rolan:
The Division is beginning the cycle of permit renewals for the Cape Fear river basin. An examination of the Cape
Fear basin plan and the NPDES permit schedule has revealed that the existing expiration dates in Cape Fear NPDES
permits do not coincide with the revised permit expiration dates for the basin. This discrepancy could create unnecessary
delays in the processing of over 200 permit renewals. Accordingly, the Division is changing the permit expiration dates for
NPDES permits in the Cape Fear river basin.
This permit modification changes the expiration date of the subject permit in subbasin 30605 to April 30, 2001.
Please find enclosed the revised permit cover page. Insert the new cover page into your permit and discard the old page.
All other terms and conditions contained in the original permit remain unchanged and in full effect. This permit
modification is issued under the requirements of North Carolina General Statutes 143-215.1 and the Memorandum of
Agreement between North Carolina and the U. S. Environmental Protection Agency.
In accordance with the modification of the permit expiration date, the new due date for your renewal application is
November 1, 2000. Renewal application forms will be sent to you approximately 6-8 weeks in advance of the new due
date or you may download the forms from the NPDES web site at http://h2o.enr.state.nc.us/NPDES/documents.html.
You will need to download Standard Form A. If you have already submitted a permit renewal form, there is no need to
submit any other forms to the Division; the application will be processed during the renewal period for your subbasin.
If any part of this permit modification are unacceptable to you, you have the right to an adjudicatory hearing upon
written request within thirty (30) days following receipt of this letter. This request must be a written petition conforming
to Chapter 150B of the North Carolina General Statutes, filed with the Office of Administrative Hearings (6714 Mail
Service Center, Raleigh, North Carolina 27699-6714). Unless such demand is made, this decision shall be final and binding.
If you have any questions concerning this permit modification, please contact Natalie Sierra at [phone],
extension 551.
cc: Central Files
Raleigh Regional Office, Water Quality Section
Point Source Compliance Enforcement Unit
NPDES Unit
1617 Mail Service Center, Raleigh, North Carolina 27699-1617
An Equal Opportunity Affirmative Action Employer
Sincerely,
qurri#1A--
Kerr T. Stevens
Telephone [phone] FAX [phone]
VISIT US ON THE INTERNET @ http://h2o.enr,state.nc.us/NPDES

Permit NC0047597
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provision of North Carolina General Statute 143-215.1, other lawful
standards and regulations promulgated and adopted by the North Carolina Environmental
Management Commission, and the Federal Water Pollution Control Act, as amended,
City of Durham
is hereby authorized to discharge wastewater from a facility located at the
Durham South WRF
6605 Fearrington Road
Durham
Durham County
to receiving waters designated as New Hope 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 September 1, 2000.
This permit and authorization to discharge shall expire at midnight on April 30, 2001.
Signed this day August 18, 2000.
Kerr T. Stevens, irector
Division of Water Quality
By Authority of the Environmental Management Commission