NC0082376_Permit Issuance_19990628

'e-
State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
James B. Hunt, Jr., Governor
Wayne McDevitt, Secretary
Kerr T. Stevens, Director
June 28, 1999
Mr. H. Dale Crisp
Public Utilities Director
P.O. Box 590
Raleigh, North Carolina 27602
/ ••
NCDENR
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
Subject: Issuance of NPDES Permit NCO082376
E.M. Johnson WTP
Wake County
Dear Mr. Crisp:
In accordance your request for an NPDES permit renewal received on October 9, 1997, the
Division is forwarding herewith the subject NPDES permit. This permit is issued pursuant to the
requirements of North Carolina General Statute 143-215.1 and the Memorandum of Agreement
between North Carolina and the US Environmental Protection Agency dated December 6, 1983.
The following changes (which originally appeared in the draft permit) appear in the final permit:
• Monitoring requirements for Total Nitrogen and Total Phosphorus have been included in the
permit renewal. Special conditions A.(2) and A.(3) have been added to the permit renewal to
guide you through the revised monitoring requirements and load calculations. This action
is a result of the rule supporting the Neuse River Basin Nutrient Sensitive Waters
Management Strategy, recently adopted by the Environmental Management Commission.
• The permit expiration date has been changed. The permit will expire on February 28, 2003.
• The following note was included on the effluent monitoring page "There shall be no discharge of
waste or chemicals that do not directly result from the responsible treatment of raw water." This note was added to
clarify that the only activities covered by this permit are those described on the Supplement
to Permit Cover Sheet.
Two special conditions were included in the final permit at the request of the Division's Raleigh
Regional Office. Special Condition A. (4.) was included to outline the procedures that must be followed
when discharging wastewater from the filter flume drain, pump wet well and/or the raw water
reservoir drain. Special condition A. (5.) was included to clarify that the subject facility may discharge
any compound associated with the treatment of raw water as long as such discharges comply with all
effluent limits present in the final permit.
If any parts, measurement frequencies or sampling requirements contained in this permit are
unacceptable to you, you have the right to an adjudicatory hearing upon written request within thirty
(30) days following receipt of this letter. This request must be in the form of a written petition,
conforming to Chapter 150B of the North Carolina General Statutes, and filed with the Office of
Administrative Hearings, Post Office Drawer 27447, Raleigh, North Carolina 27611-7447. Unless such
demand is made, this decision shall be final and binding.
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

Please take notice that this permit is not transferable except after notice to the Division of
Water Quality. Contact Division personnel in case of any change in ownership or control of this
discharge. The Division of Water Quality may require modification or revocation and reissuance of the
permit.
This permit does not affect the legal requirements to obtain other permits which may be
required by the Division of Water Quality or permits required by the Division of Land Resources, the
Coastal Area Management Act or any other Federal or Local governmental permit that may be
required. If you have any questions concerning this permit, please contact Charles Weaver at
telephone number [phone], extension 511.
Sincerely,
Original Signed By
David A. Goodrich
Kerr T. Stevens
cc: Central Files
Mr. Roosevelt Childress / EPA
Raleigh Regional Office / Water Quality Section
NPDES Unit
Point Source Compliance Enforcement Unit

A
Permit NCO082376
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, the
City of Raleigh
is hereby authorized to discharge wastewater from a facility located at the
E.M. Johnson WTP
10301 Falls of Neuse Road
Raleigh
Wake County
to receiving waters designated as an unnamed tributary to the Neuse River (outfall 001) and
an unnamed tributary to Honeycutt Creek (Outfall 002) in the Neuse River Basin
in accordance with effluent limitations, monitoring requirements, and other conditions set
forth in Parts I, II, III, and IV hereof.
The permit shall become effective August 1, 1999.
This permit and the authorization to discharge shall expire at midnight on February 28, 2003
Signed this day June 28, 1999.
Original Signed By
David A. Goodrich
Kerr T. Stevens, Director
Division of Water Quality
By Authority of the Environmental Management Commission

SUPPLEMENT TO PERMIT COVER SHEET
City of Raleigh
is hereby authorized to:
Permit No. NC0082376
1. Continue to discharge treated filter backwash water and residuals from the settling tanks
in the raw water treatment process, which consists of dual (north and south) settling
basins, sludge basin, flow splitter box, three sludge thickeners, four sludge holding tanks,
two belt filter presses, polymer feed system, sludge pumps, filtrate pumps, sand drying
beds (one half used for spill containment purposes and incidental stormwater, another
half used for residuals stockpiling, with filtrate routed back through the backwash
treatment system), and parshall flume with ultrasonic flow measurement, located at the
Raleigh Water Treatment Plant, 10301 Falls of Neuse Road, Wake County (See Part III
of this permit), and
2. Discharge from said treatment works at the locations specified on the attached map into
an unnamed tributary of the Neuse River (outfall 001) which is classified as C-NSW
waters in the Neuse River Basin and into an unnamed tributary to Honeycutt Creek
(outfall 002) which is classified as WS-IV-NSW-CA waters in the Neuse River Basin.

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ROAD CLASSIFICATION
PRIMARY HIGHWAY LIGHT -DUTY ROAD, HARD OR
HARD SURFACE IMPROVED SURFACE
SECONDARY HIGHWAY
HARD SURFACE =011111111=1 UNIMPROVED ROAD = -
Latitude 35n54'38"
Longitude 78°35'25"
Map # D24NE
Sub -basin 03-04-02
Stream Class
C-NSW
Discharge Class
21
Receiving Stream
LIT to Neuse River
Design 0 Not Limited Permit expires 02/28/03
SCALE 1:24 000
0 1 MILE
0 7000 FEET
1 0 1 KILOMETER
CONTOUR INTERVAL 10 FEET
QUAD LOCATION
E.M. Johnson WTP
NCO082376
Wake County

ROAD CLASSIFICATION
PRIMARY HIGHWAY LIGHT -DUTY ROAD, HARD OR
HARD SURFACE IMPROVED SURFACE
SECONDARY HIGHWAY
HARD SURFACE C=3111111111r= UNIMPROVED ROAD
Latitude 35°54'56' Longitude 78035'59°
Map # D24NE Sub -basin 03-04-02
Stream Class WS-IV-NSW-CA
Discharge Class 21
Receiving Stream LIT to Honeycutt Creek
Design Q Not Limited Permit expires 02/28/03
SCALE 1:24 000
0 1 MILE
0 7000 FEET
CONTOUR INTERVAL 10 FEET
QUAD LOCATION
E.M. Johnson WTP
NCO082376
Wake County

A.(1) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS FINAL
Permit No. NC0082376
During the period beginning on the effective date of the permit and lasting until expiration, the Permittee is authorized to discharge from outfall serial number 001
and 002. Such discharges shall be limited and monitored by the Permittee as specified below for each outfall:
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Flow
Weekly
Estimate
E
Total Suspended Solids
30.0 m /l
45.0 m /I
2/Month
Grab
E
Settleable Solids
0.1 mill
0.2 mill
Weekly
Grab
E
Turbidity2
Week
Grab
U D
Total Nitro en3
Month
Composite
E
Total Nitro en3
Monthly
Calculated
E
Total Nitro en3
Annually
Calculated
E
Total Phosphorus
Monthly
Composite
E
Total Iron
Wee Iv
Grab
E
Total Residual Chlorine
Weekly
Grab
E
H4
Weekly
Grab
E
Total Aluminum
Weekly
Grab
E
of •
Sample locations: E - Effluent, U - Upstream at a feasible location above the discharge point, D - Downstream at a feasible location below the discharge point
2 The discharge shall not cause the turbidity of the receiving water to exceed 50 NTU. If the turbidity exceeds these levels due to natural background conditions,
the discharge level cannot cause any increase in the turbidity in the receiving water.
3 See special condition A.(2). on the Supplement to Effluent Limitations and Monitoring Requirements Page.
4 The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units.
All samples collected should be of a representative discharge.
There shall be no discharge of floating solids or visible foam in other than trace amounts.
There shall be no discharge of waste or chemicals that do not directly result from the responsible treatment of raw water.

Permit No. NCO082376
SUPPLEMENT TO EFFLUENT LIMITATIONS
AND MONITORING REQUIREMENTS
SPECIAL CONDITIONS
A.(2). Total Nitrogen Monitoring
The Permittee shall calculate annual total nitrogen mass loading as the sum of monthly loadings,
according to the following equations:
(L) Monthly Loading (lb) = Days x TN x QW x 8.34
where:
Days = The number of discharge days in that month
TN = The average total nitrogen concentration (mg/1) of the composite samples
collected during the month
QW = The average daily waste flow (MGD) for the month
8.34 = Conversion factor, from (mg/1 x MGD) to pounds
The annual mass loading is the sum of the monthly loadings:
(2.) Annual Mass Loading (lb/yr)= E (Monthly Loadings) for the calendar year.
The Permittee shall report the total nitrogen concentration for each sample and the monthly mass
loading, in the appropriate monthly self -monitoring report; and the annual total nitrogen mass
loading, in the self -monitoring report for December of each year.
A.(3).
CHANGE IN COALITION MEMBERSHIP
At the time of permit issuance, the Permittee had expressed interest in joining a Nutrient Trading
Coalition. The Permittee shall notify the Division in writing within five (5) working days if, at
any time during the term of this permit, the Permittee elects not to join the coalition, or if it
withdraws or otherwise loses its membership in the coalition. Notification shall be sent to:
Division of Water Quality, NPDES Unit, P.O. Box 29535, Raleigh, NC 27626-0535.
A.(4).
DISCHARGE FROM NON-STORMWATER DRAINS
The Raleigh Regional Office must be notified if the E.M. Johnson plant discharges wastewater
from the filter flume drain, pump wet well, and / or the raw water reservoir drain. Additionally,
during the drainage time, the stormwater/groundwater outfall should be monitored daily for the
parameters specified for outfalls 001 and 002 until such time that the discharge ceases.
Should monitoring of the stormwater/groundwater outfall indicate exceedances of the limited
parameters for outfalls 001 and 002, the Division of Water Quality may require that this outfall
be designated as an effluent outfall or that this drainage water be rerouted through the existing
backwash treatment system.

SOC PRIORITY PROJECT: Yes: No: X
If Yes, SOC No.:
NPDES STAFF REPORT A' D RECOMMENDATIONS
FOR RALEIGH WATE' TREATMENT PLANT
(E.M. JOHNSON WTP, NPDES RENEWAL)
Date: 1/21/98
To: NPDES Unit
Water Quality Section
Attention: Neff Myrha
County: Wake
Permit No.: NCO082376
PART I - GENERAL INFORMATION
1. Facility and Address: City of Raleigh (E.M. Johnson Water Treatment Plant)
P.O. Box 590
Raleigh, NC 27602
Attn: Dempsey Benton, Jr., City Manager
Location: 301 Falls of the Neuse Road
Raleigh, NC 27614
2. Date of Investigation: January 9, 1998
3. Report Prepared by: Susan A. Wilson
4. Persons Contacted and Telephone Number: John Garland, WTP
Superintendent, (919) 870 - 2870.
5. Directions to Site: From the beltline, go north onto Wake Forest Road.
Continue north on Falls of the Neuse Road. The WTP is on the left prior to
Falls Lake.
6. Discharge Point(s), List for all discharge points:
001 002
Latitude: 35" 54' 38" 35" 54' 56"
Longitude: 78 " 35' 25" 78 " 35' 59"
Attach a USGS map extract and indicate treatment facility site and discharge point
NPDES Staff Report
Raleigh (E.M. Johnson) WTP NCO082376
Page 1

on map.
U. S.G.S. Quad No.: D24NE U. S.G.S. Quad Name: Wake Forest
7. Site size and expansion area consistent with application? Yes: X
No: If No, explain:
8. Topography (relationship to flood plain included): The site has been graded, but
appears to be above the flood plain (flood plain elevation unknown).
9. Location of nearest dwelling: New dwellings have been built within 1000 ft. of
the treatment plant.
10. Receiving stream or affected surface waters:
001- Unnamed tributary to the Neuse River, Neuse River Basin.
002 - Unnamed tributary to Honeycutt Creek, Neuse River Basin.
a. Classification: 001- C NSW, SI: 27-(20.7)
002 - W S IV, NSW, CA SI: 27-20-(2)
b. River Basin and Subbasin No.: 030401
C. Describe receiving stream features and pertinent
downstream uses: The currently used discharge point (002), is
on the borderline of the critical area which feeds to Falls Lake.
The stream is a typical suburban stream.
PART II- DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
1. a. Volume of Wastewater to be permitted: N/A. Any discharge is dependent on the
filter backwash. Recent flow records indicate the typical discharge volume to
be 3 - 4 MGD.
b. What is the current permitted capacity of the Waste Water Treatment facility?
N/A
C. Actual treatment capacity of the current facility (current design capacity)?
N/A
d. Date(s) and construction activities allowed by previous Authorization to
Construct issued in the previous two years: None. An Authorization to
Construct permit for the treatment facilities (for backwash water and
sludge dewatering) was issued March 14, 1994. The City has stated in
their renewal request that the construction of these facilities has
proceeded in two phases, with the second phase currently under
construction. The RRO assumes that what is currently under
construction was permitted with the 3/14/94 ATC.
NPDES Staff Report
Raleigh (E.M. Johnson) WTP NC0082376
Page 2

e. Please provide a description of existing or substantially constructed
wastewater treatment facilities: The existing treatment facility consists of
dual (north and south) settling basins for filter backwash water, sludge
basin, flow splitter box, three sludge thickeners (clarifier types), 4 sludge
holding tanks (prior to filter presses), 2 belt filter presses, polymer feed
system, slud a um s filtrate pumps, sand drying beds (one portion
use s ill containment, another portion used for residuals
stockpiling), pars a ume with ultrasonic flow measurement.
v�- f. Please provide a description of proposed wastewater treatment facilities: Per
' Rohn Garland, the facility will add another belt press, additional polymer
4if feed and reconfigure some piping (especially rerouting the filtrate from
the sand drying beds used for spill containment to the filtrate pumps).
pNz g. Possible toxic impacts to surface waters: Potentially, the typical residual
constituents used in the treatment of drinking water (iron sulfate,
sodium hydroxide, potassium permanganate, calcium carbonate,
activated carbon, sodium hypochlorite, hydroflourosilic acid). The
facility also uses ammonia in drinking water treatment; residual amounts
may be discharged in the effluent and have the potential for nutrient
additions to Fa11s�Lake. "%e ��d hsCkbou"e-'d_
-0
d a F� .cam.
h. Pretreatment Program (POTWs only): N/A
2. Residuals handling and utilization/disposal scheme: The facility has landfllled residuals
in the past. However, per John Garland, the City is in the process of hiring a
contractor to use the residuals as a soil amender (land application). The RRO has no
knowledge that the City or its contractor has applied for any residuals disposal permit.
The residuals permitting requirements will be clarified in the inspection letter to the
City.
3. Treatment plant classification (attach completed rating sheet) : Class I, by definition.
However, due to the complexities of the plant, the RRO requests that this facility be
rated at least a Class H. (See rating sheet for points determination).
4. SIC Code(s): 4941
Wastewater Code(s) of actual wastewater, not particular facilities i.e.., non -contact
cooling water discharge from a metal plating company would be 14, not 56.
Primary: 21
Main Treatment Unit Code: 510x3; "3" is future disposal method.
PART III - OTHER PERTINENT INFORMATION
NPDES Staff Report
Raleigh (E.M. Johnson) WTP NCO082376
Page 3

1. Is this facility being constructed with Construction Grant Funds or are any public
monies involved. (municipals only)? N/A
2. Special monitoring or limitations (including toxicity) requests: Due to HB 515 and
the fact that this facility discharges into Falls Lake, the Division may wish to
require the City to monitor NH3-N to determine possible nutrient impacts from
water treatment plants which add NH3-N. The RRO is unsure what quantity, if
any, may be present in the discharge.
Additionally, due to confusion at the plant, please specifiy in the permit that
upstream samples should be taken at a feasible location upstream of the
discharge. The RRO will work with plant personnel to determine the most
feasible location. l-e-e 0,e[o(,,) . TW
3. Important SOC, JOC or Compliance Schedule dates: (Please indicate) N/A
4. Alternative Analysis Evaluation: Has the facility evaluated all of the non -discharge
options available? Please provide regional perspective for each option evaluated.
N/A - existing facility.
PART IV - EVALUATION AND RECOMMENDATIONS
The City of Raleigh treats raw water from Falls Lake. The treatment system for filter
backwash water and settling sludge is more complex than many existing facilites.
The RRO requests that the effluent discharge description state (generally) that the facility
discharges treated wastewater originating from filter backwash water and residuals from
settling tanks in the raw water treatment process. Additionally, the City may discharge
treated filtrate wastewater from drying beds used for emergency spill control and
incidental stormwater.
Only outfall 002 (UT Honeycutt Creek) is being used currently. Mr. Garland was unsure
if outfall 001 was still needed. This should be confirmed prior to permit issuance (this will
be stated in the inspection letter).
Signature of report preparer (Susan A. Wilson) Date
FZ, r. ,,A� t— I as
D Wail Qu ity Regional Supervisor ate g,
h:\82376.sr 'l p_M•e.� Ob
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4,0- 4.
`o^n. NPD S Staff Report
V �`Q Raleigh (E.M. Johnson) WTP NCO082376
Pa 4 d gP L)
apeDQ.

DIVISION OF WATER QUALITY
April 2, 1998
MEMORANDUM
TO: File
FROM: Jeff Myhra
DATE: April 2, 1998
SUBJECT: Permit file review for Raleigh WTP (NC0082376)
Facility Information:
Qw = Not Limited
Outfall 001 = UT to Neuse River
Outfall 002 = UT to Honeycutt Creek
04-02-01
Stream Class:
Outfall 001
UT to Neuse River
C-NSW
27-(20.7)
Stream Class:
Outfall 002
UT to Honeycutt Creek
WS-IV-NSW-CA
27-20-(2)
• Staff report was prepared on 1-21-98.
The existing system consists of dual (north and south) settling basins for filter backwash
water, sludge basin, flow splitter box, three sludge thickeners (clarifier types), 4 sludge
holding tanks (prior to filter presses), 2 belt filter presses, polymer feed system, sludge
pumps, filtrate pumps, sand drying beds (one portion used for spill containment, another
portion used for residuals stockpiling), parshall flume with ultrasonic flow measurement.
Region requests that the facility be rated as a Class R facility.
Region offered the following comment in reference to the spill containment area at the facility:
U
<--0 ✓
J
Spilled materials should not be discharged through the effluent outfall unless appropriate
limits are established.
The city should not be allowed to discharge waste or spilled chemicals that do not result
from the treatment of raw water.
Due to HB 515 and the fact that this facility discharges into Falls Lake, the Division may
wish to require the city to monitor for N143-N to determine possible nutrient impacts.
RRO recommended that we include a condition in the permit requiring them to perform
upstream monitoring at a feasible location upstream of the discharge.
RRO requests that the effluent discharge description state that the facility discharges treated
wastewater originating from filter backwash water and residuals from the settling tanks in
the raw water treatment process. Additionally, the City may discharge treated filtrate
wastewater from the drying beds used for emergency spill control and incidental
stormwater. Region also added that this permit does not allow the city to discharge

Raleigh WTP (NC0082376)
Page 2 of 2
�7 wastewater resulting from the treatment of raw water, not spilled chemicals or waste
chemicals. If the city plans to discharge spilled chemicals, there must be limits in the
permit for these materials. The NPDES permit does not give them free reign to discharge
\ any spilled chemical if "there is no limit in the permit." The city should be required to
submit a Spill Prevention Containment and Cleanup Disposal Plan.
RRO recommended that the need for outfall 001 should be confirmed prior to permit
issuance.
• Application was received on October 7, 1997.
The discharge facilities originally permitted and authorized for construction by the Division
have been constructed in two phases. The first phase of the project was completed in 1994.
The second phase of the filter backwash waster / sludge treatment facilities is currently under
construction and is scheduled to be completed in October 1998.
Facility indicated that the chemicals used at the water plant as a coagulated aid have changed.
The city now uses ferric sulfate and aluminum sulfate. Other chemicals used at the plant in the
drinking water treatment process include: sodium hydroxide, potassium permanganate,
calcium carbonate, power activated carbon, sodium hypochlorite, hydroflourosilic acid, and
ammonia.
• DMR Review:
DMR effluent data and the instream data appeared to be consistent with the permit conditions.
• Notice of Violation was sent to the facility on December 15, 1997. Violation was for a
discharge of petroleum which reached surface waters at the E.M. Johnston Water Treatment
Plant.
• Notice and recommendation for enforcement was sent to the facility on November 8, 1996.
Violation was in response to a report of discoloration in a tributary to Falls Lake. It was found
that the plant was discharging potassium permanganate at high levels (very toxic to aquatic
life).

Permit No. NCO082376
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT, HEALTH, AND NATURAL RESOURCES
DIVISION OF ENVIRONMENTAL MANAGEMENT
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
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 Raleigh
is hereby authorized to discharge wastewater from a facility located at
F—M. Somas Water Treatment Plant 163o r +//s 8 A✓ 4�a
past-NC-SfaTe7Road-"6
Raleigh
Wake County
to receiving waters designated as UT to the Neuse Ri. andZHoneycutt Ck. respectively in the Neuse
River Basin
in accordance with effluent limitations, monitoring requirements, and other conditions set forth in
Parts I, 11, and III hereof.
This permit shall become effective At99
Z —Z,f'
This permit and the authorization to discharge shall expire at midnight on 4day31, 1998
Signed this day MMrh—t2 1993
Original Signed By
C„leen 1-1. Sullins
A. Preston Howard, Jr., Acting Director
Division of Environmental Management
By Authority of the Environmental Management Commission

is hereby authorized to:
Permit No. NC0082376
SUPPLEMENT TO PERMIT COVER SHEET
City of Raleigh
County (See Part III of this Permit), and
tI Qo�l
Discharge from said treatment works at location specified on the at�hed map into
an unnamed tributary to the Neuse Rivetlassified Class C-NSW and'Honeycutt Creek eaLJ
classified Class WS-MCA waters in the Neuse River Basin.
05w

A. (). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS FINAL
Permit No. NC0082376
During the period beginning on the effective date of the permit and lasting until expiration, the Permittee is authorized to discharge from
outfall(s) serial number 001. Such discharges shall be limited and monitored by the pemrittee as specified below:
10 OaL
Eff
luent Ph aracterlatIe.
Flow
tJ Total Suspended Solids
Settleable Solids
Turbidity
Iron
Total Residual Chlorine
Aluminum
Pt4
Discharge Llmltatlonr Moaltoring Reaulrements
Lbs/day Units (specify Measurement Sample
Mon, Avg. Daily Max Mon. Ava. Daily Max. Freguency Type
30.0 mg/I 45.0 mg/I
0.1 ml/I 0.2 ml/I
•GHQ, L'OC� ` � � � l
Weekly
2/Month
Weekly
Weekly
Weekly
Weekly
Weekly
4445
Instantaneous
'Sample
Location
E
Grab
E
Grab
E
Grab
U,D
Grab
E
Grab
Grab
E
E
I jai a lf&4' �-
XSample locations: E - Effluent, U - Upstream�D - Downstream P{ A s'bC 0�'j
Z`*<The discharge shall not cause the turbidity of the receiving water to exceed 50 NTU. If the turbidity exceeds these levels due to natural
background conditions, the discharge level cannot cause any increase in the turbidity in the receiving water.
All samples collected should be of a representative discharge.
3 The pH shall not be less than 6.0 standard units nor greater than 9.Q standard uni and-skall bo monitored weekly at the effluent bygrab-
There shall be no discharge of floating solids or visible foam in other than trace amounts.
prt� s{et61 bc, ra
Ott .d 7 Doti., wok..

A. O. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS FINAL Permit No. NC0082376
During the peri6dkeginning on the effective date of the permit and lasting until expiration, the Permittee is authorized to discharge from
outfall(s) serial num 002. Such discharges shall be limited and monitored by the permittee as specified below:
Effluent Characteristic. Discharge Limitation, Monitoring Requirements
bs/da Units (specify Measurement Sample
'Sample
Mon. Ava. Daily Max Mon. Ava. Daily Max. Frequency Tvpe Locatlon
Flow Weekly Instantaneous E
Total Suspended Solids 30.0 mg/I 45.0 mg/I 2/Month Grab E
Settleable Solids 0.1 ml/I 0.2 ml/I Weekly Grab E
Turbidity Weekly Grab U,D
Iron Weekly Grab E
Total Residual Chlorine Weekly Grab E
Aluminum Weekly Grab E
e-
* Sample locations: E - Effluent, U - Upstream, D - Downstream t7 [
** The discharge shall not cause the turbidity of the receiving water to exceed 50 NTU. If the turbidity exceeds these levels due to natural
background conditions, the discharge level cannot cause any increase in the turbidity in the receiving water.
All samples collected should be of a representative discharge.
The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall be monitored weekly at the effluent by grab
sample.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

�otio?�
City Of CRaleigh
-Worth Carolina
October 6, 1997
Mr. A. Preston Howard, Director
N. C. Division of Water Quality
P. O. Box 27687
Raleigh, N. C. 27611-7687
RE: Renewal Request for NPDES Permit No. NCO082376
City of Raleigh E. M. Johnson Water Plant
Dear Mr. Howard:
This letter is to request renewal of the City's NPDES
NCO082376 for the discharge of treated effluent from
plant filter backwash water / sludge treatment and
facilities located at the E. M. Johnson Water Plan
Falls of Neuse Road.
� V00 '--
i0-c-1_q7
Permit No.
the water
dewatering
t at 10301
Enclosed please find a check for $400.00 for the permit
application renewal processing fee, three (3) copies of a
completed permit application form (short form C), supporting
information regarding the existing water plant sludge treatment
facilities and a copy of the existing NPDES permit which expires
May 31, 1998. Please renew this permit for the continued
operation of these facilities for the full five (5) year period.
The discharge facilities originally permitted and authorized for
construction by the Division have been constructed in two
phases, due to funding limitations. The first phase of the
project was completed in 1994. The second phase of the filter
backwash water / sludge treatment facilities is currently under
construction and is scheduled to be completed in October 1998.
The wastewater streams treated by these facilities consist of
primarily of filter backwash water and sludge from the suspended
sediment coagulation / settling drinking water treatment
process.
The chemicals used at the water plant as a coagulate aid to
enhance the suspended sediment settling process (that produces
the water plant sludge) have changed recently. The City now
utilizes ferric sulfate, along with use of a polymer seasonally,
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OFFICES • 222 WEST HARGETT STREET • POST OFFICE BOX 590 • RALEIGH, NORTH CAROLINA 27602
Recycled Paper

as the primary drinking water treatment coagulates. The City
has also retained the capability to utilize aluminum sulfate as
a drinking water treatment coagulate aid, our primary coagulate
aid when this permit was originally issued. The switch to ferric
sulfate allows the City to recycle and reuse the water plant
sludge, instead of simply landfilling it, as is required for
alum sludge. The quality of the effluent from the filter
backwash / sludge treatment and dewatering facilities has been
positively effected by this change of coagulant aids, since
aluminum has all but been eliminated from the effluent.
Other chemicals used at the plant in the drinking water
treatment process include sodium hydroxide, potassium
permanganate, calcium carbonate, powder activated carbon, sodium
hypochlorite, hydroflourosilic acid, ammonia and soon, liquid
oxygen and ozone (May, 1998). Residual amounts in low
concentrations of these chemicals are present in the filter
backwash water and water plant sludge. However, due to the
expensive cost of these chemicals, the staff has added incentive
to insure that the discharged effluent has as little of these
residual chemicals as possible.
Please note that the drinking water treatment chemicals spill
containment facilities are connected (valved and piped) to the
backwash water / sludge treatment and dewatering facilities at
the Johnson Water Plant. This constituents very little of the
wastewater stream treated by the NPDES permitted facilities and
occurs infrequently. The City's chemical spill containment plan
requires that the NCDWQ Raleigh Regional Office be notified
prior to the discharge of any of the spill contained drinking
water treatment chemicals from the spill containment facility to
the backwash / sludge treatment facilities. These chemicals will
only be discharged to the backwash water / sludge treatment
facilities if they will be beneficial to the wastewater
treatment process and if they will not adversely effect the
quality of the the discharge effluent. All of the drinking water
treatment chemicals are beneficial to the backwash / sludge
treatment process, so long as they are discharged in proper
dosage concentrations that are monitored by the plant staff.
If you or your staff have any questions regarding this request,
please contact me at this number (919)-890-3400.
Yours truly,
H. Dale Cri p, P. E.
Public Util ti s Director
CC: Water Plant Superintendent
Raleigh Regional Supervisor - NCDEHNR

RATING SCALE FOR CLASSIFICATION OF WATER POLLUTION CONTROL SYSTEMS
Name of Facility:
Owner or Contacl
Mailing Address:
County: WA Ad Telephone: 670 • Z570
Present Classification: S New Facility Existing Facility
NPDES Per. No. NC00162,5% Nondisc. Per. No.WQ Health Dept.Per No.
Rated by: Sus-W Wit-son4 Telephone: G.V7( --& Date: t tS
Reviewed by: Health Dept. Telephone:
Regional Office Telephone:.5 7/- -47-op
Central Office Telephone:
ORC: 'k SvNrisna1 Grade: z Telephone: SID - ZS? O
Check Classification(s): Subsurface Spray Irrigation I Land Application
Wastewater Classification: (Circle One) 1 II III IV Total Points:
► r :►1 �:\� :► � : � I � �►II:\� �.�i11/+\1 ��■.�■ :: :\ ►11-..:: ::� �• \ � � 1: � d:l�i� 1��► ��: \�
_0 __ l 1: =Ul =►1 a -MA"MI IaI. :.►:• ty1=,1. 4* Z.. 711 ATAI ►: 0. J11 t►:.
SUBSURFACE CLASSIFICATION
(check all units that apply)
1. septic tanks
2. pump tanks
3. siphon or pump -dosing systems
4. sand filters
5. grease traprnterceptor
6. oil/water separators
7. gravity subsurface treatment and disposal:
8. pressure subsurface treatment and disposal:
SPRAY IRRIGATION CLASSIFICATION
(check all units that apply)
1. preliminary treatment (definition no. 32 )
2. lagoons
3. septic tanks
4_
pump tanks
5.
pumps
6.
sand filters
7.
grease trapfinterceptor
8.
oiVwater separators
9.
disinfection
10.
chemical addition for nutrient/algae control
11.
spray Irrigation of wastewater
W"A
In addition to the above classifications, pretreatment of wastewater in excess of these components shall
be rated using the point rating system and will require an operator with an appropriate dual certification.
LAND APPLICATION/RESIDUALS CLASSIFICATION (Applies only to permit holder)
1. Land application of biosolids, residuals or contaminated soils on a designated site.
WASTEWATER TREATMENT FACILITY CLASSIFICATION
The following systems shall be assigned a Class I classification, unless, the flow is of a significant quantity or the technology is unusually
complex, to require consideration by the Commission on a case -by -case basis: (Check if Appropriate)
1. OiUwater Separator Systems consisting only of physical separation, pumps and disposal;
2. Septic Tank/Sand Filter Systems consisting only of septic tanks, dosing apparatus, pumps,sand filters, disinfection
and direct discharge;
3. Lagoon Systems consisting only of preliminary treatment, lagoons, pumps, disinfection, necessary chemical treatment for
algae or nutrient control, and direct discharge;
4. Closed -loop Recycle Systems;
5. Groundwater Remediation Systems consisting only of oiVwater separators, pumps, air -stripping, carbon adsorption, disinfection
and disposal;
6._Aquaculture operations with discharge to surface waters;
7. Water Plant sludge handling and back -wash water treatment; Sir
8. Seafood processing consisting of screening and disposal.
9. Single-family discharging systems, with the exception of Aerobic Treatment Units, will be classified If permitted after July 1,
1993 or if upon inspection by the Division, it is found that the system Is not being adequately operated or maintained. Such
systems will be notified of the classification or reclassification by the Commission, In writing.

The following scale is used for rating wastewater treatment facilities: (circle appropriate points)
ITEM POINTS
(1)
Industrial Pretreatment Units or Industrial Pretreatment Program (see definition No. 33)...................................................4
(2)
DESIGN FLOW OF PLANT IN gpd [not applicable. to non -contaminated cooling waters. sludge handling facilities for
water purification plants. totally closed cycle systems(see definition No. 11). and facilities consisting only of hem
(4)(d) or Items (4)(d) and (11)(d)) .
0 - 20.000..........................................................................................................................................1
20,001 - 50,000............................................................................:.........................................................2
60.001 - 100,000.....................................................................................................................................3
100,001 = 250,000...................................................................................................................................4
250.001 - 500.000..................................................................................................................................5
500.001 - 1,000,000................................................................................................................................8
1,000,001 - 2.000.000........................................................................................................................... C�T1MhTcQ)
2.000.001 (anti up) rate 1 point additional for each 200.000 gpd capacity up to a maximum of .............. .30
Design Flow (gpd) Nmmve
(3)
PRELIMINARY
UNITS/PROCESSES (see defin klon No.32)
(a)
Bar Screens...............................................................................................................................................i
or
(b)
Mechanical Screens. Static Screens or Comminuting Devices..........................................................................2
(c)
Grit Removal.............................................................................................................................................1
or
(d)
Mechanical or Aerated Grit Removal.............................................................................................................2
(e)
Flow Measuring Devlce.................................................................................................................................1
or
(f )
Instrumented Flow Measurement................................................................................................................2
(g)
Preaeratlon...............................................................................................................................................2
(h)
Influent Flow Equalization.................................................................................................................2
(I)
Grease or Oil Separators Gravity.................................................................................................................2
Mechanical.................................................................................................................................................3
DissolvedAir Flotation................................................................................................................................a
())
Prechtorination.........................................................................................................................................5
(4)
PRiMARYTRFATMENT UNITSIPROCESSES
(a)
Septic Tank (see definition No. 43)............................................................................................................2
(b)
Imhoff Tank...........................................................................................................................................5
(c)
Primary Clariflers.. ...... ...... ..........................................................5
........ . ............. ...... ............................ . ..... . .
(d)
Settling Ponds or Settling Tanks for Inorganic Non-toxk; Materials (sludge handling facilities for water
purification plants, sand. gravel. stone. and other mining operations except recreational activities such as gem
orgold mining).....................................................................................................................................ICJ
(5)
SECONDARYTREATMENT Lt4r IPFK)CESSES �J
(a)
Carbonaceous Stage
(i) Aeration -High Purity Oxygen System..............................................................................20
DiffusedAir System.......................................................................................................10
Mechanical Air System (fixed. floating or rotor).................................................................8
SeparateSludge Reaeration............................................................................................3
Trickling Filter
HighRate.......................................................................................................................7
StandardRate...............................................................................................................5
PackedTower.................................................................................................................6
(ill) Biological Aerated Filter or Aerated Biological Filter............................................................10
(!v) Aerated Lagoons.......................................................................................................10
(v) Rotating Biological Contactors....................................................................................10
(v!) Sand Filters -intermittent biological..................................................................................2
Recirculatingbiological....................................................................................................3
(vli) Stabilization Lagoons....................................................................................................5
(vial) Cladfi...........................................................................................................................5
(ix) Single stage system for combined carbonaceous removal of BOD and nitrogenous removal by
nitrification (see definition No. 12)(Points for this hem have to be In addition to hams
(5)(a)(1) through (5)(a)(vi!!).
utilizing the extended aeration process (see definition No.3a)..........................................2
utilizingother than the extended aeration process............................................................a
(x) Nutrient additions to enhance BOD removal......................................................................5
(XI) Biological Culture ('Super Bugs')addhion........................................................................5
(b)
Nitrogenous Stage
(1) Aeration - High Purity Oxygen System............................................................................20
Diffused AIr System............................................................................................10
.........
Mechanical Air System (fixed. floating or rotor) ................. .,.............................................. A
SeparateSludge Reaeration............................................................................................3
(If) Trickling Filter -High Rate...................................................................................................7
StandardRate................................................................................................................6
PackedTower................................................................................................................5
(!it) Biological Aerated Filter or Aerated Biological Flher.............................................................10
(IV) Rotating Biological Contactors......................................................................................10
(v) Sand Filter - intermittent billogical...................................................................................2
Recirculatingbiological......................................................:.............................................3
(VI) Clarifier............................. .............................................................................................5
(6)
TERTIARY OR ADVANCED TREATMENTUNiT&PROCESSES
(a)
Activated Carbon Beds -
whhoutcarbon regeneration...................................................................................................5
withcarbon regeneration.......................................................................................................16
(b)
Powdered or Granular Activated Carbon Food -
withoutcarbon regeneration.................................................................................................5
withcarbon regeneration.....................................................................................................18
(c)
Air stripping.............................................................................................................................................5
(d)
Denhriflcatlon Process............................................................................................................................:.10
(0)
Electrodlalysls............................................................................................................................................5
(f )
Foam Separation.......................................................................................................................................5
(g)
ion Exchange............................................................................................................................................5
(h)
Land Application of Treated Effluent (see definition No. 22b) (not applicable for sand. gravel. stone
and other similar mining operations) by high rate Infiltration.........................................................................4
(i)
Microscreens. ...... .................... ... ............................................................5
... ........................... .......... .... .... ...
())
Phosphorous Removal by Biological Processes (See definition No. 26)........................................................2 0
(k)
Polishing Ponds - without aeration............................................................................................................2
withaeration.................................................................................................................5

•
(1)
Post Aeration - cascade........................................................................................................0
(m)
diffusedor mechanical .............................. .2
Reverse Osmosis......................................................................................................................................5
.................................................2
(n)
Sand or Mixed -Media Filters - low rate ......................................................
`
...................................................
high rate
(o)
......................................................................5
Treatment processes for removal of metal or cyanide...................................................................................15
(p)
treatment processes for removal of toxic materials other than metal or cyanide..............................................1 5
(7)
SWDGETREATMENT
(a)
Sludge Digestion Tank - Heated (anaerobic)...............................................................................................10
Aerobic..............................................................................................................................................5
Unheated
(anaerobic). - ..............................................................................................
(b)
.3
Sludge Stabilization (chemical or thermal) ..........................................................................................
(c)
.5
Sludge Drying Beds - Gravity......................................................... ..........................................................--.5
Vacuum Assisted.............................................
(d)
Sludge Efutriation.... ....... .........................................................................................................5
...... .... ... ......................................................
(e)
(f)
Sludge Conditioner (chemical or
thermal).......................................................... ........................................ Sludge Thickener (gravity)...................................................... ....................................................................
(g)
Dissolved Air Flotation Unit [not applicable to a unit rated as (3)(i)]......................................�.....
(h)
Sludge Gas Utilization (includingas storage) ..............
(i)
Sludge Holding Tank - Aerated....................................................................... ............................................
Non-aerated............................................................................................................................................
(j)
Sludge Incinerator (not Including activated carbon regeneration)............................................................. ..
(k)
Vacuum Fitter. Centrifuge. or Filter Press or other similar dewatering devices.................................................
(8)
RESIDUALS UTILIZATION/DISPOSAL (Including Incinerated ash)
(a)
Lagoons..................................................................................................................................................2
(b)
Land Application (surface and subsurface) (see definition 22a)
by contracting to a land application operator or landfill operator who holds the land application permit•
or landfill permit �"'
(c)
-,,,,, „„„--.........-
Dedicated Landfill(budal)�by•the �permhtee•of the wastewater treatment facility...............................................
(9)
DGNFECi1CN
(a)
Chlorination........................................................................................................... ............................5
(b)
Dechlorination..............................................................................................................5
. ...........................
(c}
Ozone......................................................................................................................................................5
(d)
Radiation..................................................................................................................................................6
(10)
CHEMICAL ADDITION SYSTEM(S) ( see definition No. 9) [not applicable to chemical additions rated as hem (3)0).
(5)(a)(xij,
List................................-..............................................................................................
(6)(a) 6)(b). (7)(b). (7)(e). (9a). (9)(b) or (9)(c) 5 points each:
.................................................................................................................................... S
(11)
...................................................................................................................................... 5
MISCELLANEOUS UN(TS/PROCESSES
(a)
Holding Ponds. Holding Tanks or Settling Ponds for Organic or Toxic Materials including wastes from mining
operations containing nitrogen or phosphorus compounds In amounts significantly greater than Is common
fordomestic wastewater...........................................................................................................................A
(b)
Effluent Flow Equalization (not applicable to storage basins which are Inherent In land application systems) ..... 2
(c)
(d)
Stage Discharge (not applicable to storage basins Inherent in land application systems) ................................
Pumps....................................................................................................................................................
(0)
Stand -By Power Supply............................................................................................................................
(f)
Thermal Pollution Control Device............................................................................................................ ...3
TOTALPOINTS..........................................................................—
CLASSiFICATION
ClassI ......................................................................................................5-25 Points
Class11.........................................................................................................26-50 Points
ClassIII........................................................................................................ 51-65 Points
ClassIV .............. ......................................................................................... 66-Up Points
Facilities having a rating of one through four points. Inclusive, do not require a certified operator.
Facilities having an activated sludge process will be assigned a minimum classification of Class II.
Facilities having treatment processes for the removal of metal or cyanide will be assigned a minimum classification of Class 11.
Facilities having treatment processes for the biological removal of phosphorus will be assigned a minimum classification of Class Ill.
.0004 DEFINITIONS
The following definitions shall apply throughout this Subchapter.
(1) Activated Carbon Beds. A physical/chemical method for reducing soluble organic material from wastewater effluent; The column -type beds used in this
method will have a flow rate varying from two to eight gallons per minute per square foot and may be either upfiow or downfiow carbon beds. Carbon may or
may not be regenerated on the wastewater treatment plant site;
(2) Aerated Lagoons. A basin in which all solids are maintained In suspension and by which biological oxidation or organic matter is reduced through artificially
accelerated transfer of oxygen on a flow -through basis;
(3) Aeration. A process of bringing about Intimate contact between air or high purity oxygen In a liquid by spraying. agitation or diffuslon;(3a) Extended
Aeration. An activated sludge process utilizing a minimum hydraulic detention time of 16 hours.
(4) Agriculturally managed site. Any she on which a crop is produced. managed. and harvested (Crop includes grasses. grains. trees. etc.);
(6) Air Stripping. A process by which the ammonium ion Is first converted to dissolved ammonia (pH adjustment) with the ammonia then released to the
atmosphere by physical means; or other similar processes which remove petroleum products such as benzene. toluene. and xylene;
(6) Carbon Regeneration. The regeneration of exhausted carbon by the use of a furnace to provide extremely high temperatures which volatilize and oxidize the
absorbed impurities;
(7) Carbonaceous Stage. A stage of wastewater treatment designed to achieve 'secondary• effluent iimits:
(8) Centrifuge. A mechanical device in which centrifugal force Is used to separate solids from liquids or to separate liquids of different densftias;
(9) Chemical Addition Systems- The addition of chemical(s) to wastewater at an application point for purposes of Improving solids removal. pH adjustment,
alkalinity control, etc.; the capability to experiment with different chemicals and different application points to achieve a specific result will be considered one
system; the capability to add chemicals) to dual units will be rated as one system; capability to add a chemical at a different application points for different
purposes will result In the systems being rated as separate systems;
(10) Chemical Sludge Conditioning. The addition of a chemical compound such as lime, ferric chloride, or a polymer to wet sludge to coalesce the mass prior to
its application to a dewatering device;
(11) Closed Cycle Systems. Use of holding ponds or holding tanks for containment of wastewater containing Inorganic. non -toxic materials from sand. gravel,
crushed stone or other similar operations. Such systems shall carry a maximum of two points regardless of pumping facilities or any other appurtenances;
(12) Combined Removal of Carbonaceous BOD and Nitrogenous Removal by Nitrification- A single stage system required to achieve pertnR effluent limits on BOD
and ammonia nitrogen within the same biological reactor,
(13) Dechlorinatton. The partial or complete reduction of residual chlorine in a liquid by any chemical or physical process;
(14) Denitrification Process. The conversion of nhrate-nhrogen to nitrogen gas;

(15) Electrodialysis. Process for removing Ionized salts from water through the use of ion -selective Ion -exchange membranes;
(16) Filter Press. A process operated mechanically for partially dewatering sludge;
(17) Foam Separation. The planned frothing of wastewater or wastewater effluent as a means of removing excessive amounts of detergent materials through
the introduction of air in the form of fine bubbles; also called foam fractionation;
(18) Grit Removal. The process of removing grit and other heavy mineral matter from wastewater;
(19) Imhoff Tank. A deep two story wastewater tank consisting of an upper sedimerdation chamber and a lower sludge digestion chamber.
(20) Instrumented Flow Measurement. A device which Indicates and records rate of flow;
(21) Ion Exchange. A chemical process In which Ions from two different molecules are exchanged;
(22) Land application:
(a) Sludge Disposal. A final sludge disposal method by which wet sludge may be applied to land either by spraying on the surface or by subsurface injection
(i.e.. chisel plow); (not applicable for types of sludge described In (11) of this Rule);
(b) Treated Effluent. The process of spraying treated wastewater onto a land area or other methods of application of wastewater onto a land area as a
means of final disposal or treatment;
(23) Microscrean. A low speed, continuously back -washed, rotating drum filter operating under gravity condillons as a polishing method for removing
suspended solids from effluent;
(24) Nitrification Process. The biochemical conversion of unoxidized nitrogen (ammonia and organic nitrogen) to oxidized nitrogen (usually nitrate);
(25) Nitrogenous Stage. A separate stage of wastewater treatment designed for the specific purpose of converting ammonia nitrogen to nitrate nitrogen;
(26) Phosphate Removal, Biological. The removal of phosphorus from wastewater by an ox€clanoxic process designed to enhance luxury uptake of phosphorus
by the microorganisms;
(27) Polishing Pond. A holding pond following secondary treatment with sufficient detention time to allow settling of finely suspended solids.
(28) Post Aeration. Aeration following conventional secondary treatment units to Increase effluent D.O. or for any other purpose;
(29) Post Aeration. (Cascade) A polishing method by which dissolved oxygen Is added to the effluent by a nonmechanical. gravity means of flowing down a
series of steps or weirs; The flow occurring across the steps or weirs moves in a fairly thin layer and the operation of the cascade requires no operator
adjustment; thus, zero points are assigned even though this is an essential step to meeting the limits of the discharge permit;
(30) Powdered to Granular Activated Carbon Feed. A biophysical carbon process that utilizes biological activity and organic absorption by using powdered or
granular activated carbon; Virgin or regenerated carbon Is feed controlled Into the system;
(31) Preaeration. A tank constructed to provide aeration prior to primary treatment;
(32) Preliminary Units. Unit operations In the treatment process. such as screening and comminution, that prepare the liquor for subsequent major operations;
(33) Industrial Pretreatment.
(a) Pre-treatment Unit, Industrial. The conditioning of a waste at its source before discharge. to remove or to neutralize substances Injurious to sewers and
treatment processes or to effect a partial reduction in load on the treatment process which is operated by the same governing body as the wastewater
treatment plant being rated:
b) Pre-treatment Program, Industrial - must be a State or EPA required program to receive points on the rating sheet;
(34) Primary Clarifiers. The first settling tanks through which wastewater is passed In a treatment works for the purpose of removing settleable and suspended
solids and BOD which Is associated with the solids;
(35) Pumps. All Influent, effluent and in -plant pumps;
(36) Radiation. Disinfection or. sterilization process utilizing devices emitting ultraviolet or gamma rays;
(37) Reverse Osmosis. A treatment process In which a heavy contaminated liquid Is pressurized through a membrane forming nearly pure liquid free from
suspended solids;
(38) Rotating Biological Contractors. A fixed biological growth process In which wastewater flows through tanks In which a series of partially submerged circular
surfaces are rotated;
(39) Sand Filters:
(a) Intermittent Biological. Filtration of effluent following septic tanks, lagoons, or some other treatment process In which further biodecomposhlon Is
expected to pmduoe desired effluents; Hydraulic loading rates on these filters are computed in gpd/ac and have a resulting low gpm/sf (less than one);
b) Recirculating biological - the same type of sand filter as defined in Subparagraph (39) (a) of this Rule with the added capability to recycle effluent back
through the sand filter.
(40) Sand or Mixed -Media Filters. A polishing process by which effluent limits are achieved through a further reduction of suspended solids;
(a) low rate — gravity, hydraulically loaded filter with loading rates In the one to three gpm/sf range;
(b) high rate -- a pressure. hydraulically loaded filter with loading rates In the five gpmisl range; At any rate, the loading rate will exceed three gprMsf;
(41) Secondary Clarifiers. A tank which follows the biological unit of treatment plant and which has the purpose of removing sludges associated with the
biological treatment units;
(42) Separate Sludge Reaeratlon. A part of the contact stabilization process where the activated sludge Is transferred to a tank and aerated before returning it
to the contact basin;
(43) Septic Tank A single -story settling tank in which settled sludge Is in contact with the wastewater flowing through the tank; shall not be applicable for
septic tank systems serving single family residences having capacity of 2.000 gallons or less which discharge to a nitrification field;
(44) Sludge Digestion. The process by which organic or volatile matter and sludge is gasified. liquefied. mineralized or converted Into more stable organic matter
through the activity of living organisms. which includes aerated holding tanks;
(45) Sludge Drying Beds. An area comprising natural or artificial layers of porous materials upon which digested sewage sludge Is dried by drainage and
evaporation;
(46) Sludge Elutriatlon. A process of sludge conditioning In which certain constituents are removed by successive washings with fresh water or plant effluent;
(47) Sludge Gas Utilization. The process of using sewage gas for the purpose of heating buildings. driving engines. etc.;
(48) Sludge Holding Tank (Aerated and Nonaerated). A tank utilized for small wastewater treatment plants not containing a digester In which sludge may be
kept fresh, and supernatant withdrawn prior to a drying method (i.e. sludge drying beds); This may be done by adding a small amount of air simply to keep the
sludge fresh. but not necessarily an amount that would be required to achieve stabilization of organic matter. A nonaerated tank would simply be used to
decant sludge prior to dewaterfng and would not allow long periods (several days of detention) wihout resulting odor problems;
(49) Sludge Incinerators. A furnace designed to bum sludge and to remove all moisture and combustible materials and reduce the sludge to a sterile ash;
(50) Sludge Stabilization (Chemical or Thermal), A process to make treated sludge less odorous and putrescble, and to reduce ft pathogenic organism
content; This may be done by pH adjustment. chlorine dosing. or by heat treatment;
(51) Sludge Thickener. A type of sedimentation tank In which the sludge Is permitted to settle and thicken through agitation and gravity;
(52) Stabilization Lagoon. A type of oxidation lagoon in which biological oxidation of organic matter Is effected by natural transfer of oxygen to the water from
air (not a polishing pond);
(53) Stand -By Power Supply. On site or portable electrical generating equipment;
(54) Static Screens. A stationary screen designed to remove solids, including nomblodegradable particulate (ffoatable solids. suspended solids and BOD
reduction) from municipal and Industrial wastewater treatment systems;
(55) Tertiary Treatment. A stage of treatment following secondary which Is primarily for the purpose of effluent polishing; A settling lagoon or sand or coal filter
might be employed for this purpose;
(56) Thermal Pollution Control Device. A device providing for the transfer of heat from a fluid flowing In tubes to another fluid outside the tubes, or vice versa;
or other means of regulating liquid temperatures;
(57) Thermal Sludge Conditioner. A conditioning process by which heat is added for a protracted period of time to Improve the dewaterabllhy of sludge by the
solubilizing and hydraulizing of the smaller and more highly hydrated sludge particles;
(58) Toxic Materials. Those wastes or combinations of wastes. Including disease -causing agents which after discharge and upon exposure, Ingestion. Inhalation
or assimilation into any organism, either directly from the environment or Indirectly by Ingestion through food chains, will cause death, disease, behavioral
abnormalities. cancer. genetic mutations, physiological malfunctions (Including malfunctions In reproduction) or physical deformations. In such organisms or their
offspring; Toxic materials Include. by way of Illustration and not limitation: lead, cadmium, chromium. mercury. vanadium. arsenic. zinc. onho-Ntro-cNorobenzene
(ONCE), polychlorinated blphenyls (PCBs) and dichlorodiphenyl tdchloroethane (DDT); and any other materials that have or may hereafter be determined to have
toxic properties;
(59) Trickling Filter. A biological treatment unit consisting of a material such as broken stone or rock over which wastewater Is distributed; A high rate trickling
filter is one which operated at between 10 and 30 mgd per acre. A low rate trickling filter is one which is designed to operate at one to four mgd per acre:
(60) Trickling Filter (Packed Tower). A plug flow type of operation In which wastewater flows down through successive layers of media or filtrate material; Organic
material is removed continually by the active biological fixed growth In each successNe layer. This method may produce •secondary• quality effluent. or may be
adapted to produce a nitrified effluent;
(61) Vacuum Filter, Centrifuges. or Filter Presses. Devices which are designed to remove excess water from either digested or undigested sludge prior to disposal
or further treatment.

SUMMARY OF
WASTE SYSTEM PROCESS STUDY
E.M. JOHNSON WATER TREATMENT PLANT
CITY OF RALEIGH, NORTH CAROLINA
PIEDMONT OLSEN HENSLEY, INC.
Engineers, Architects, Planners
Raleigh, North Carolina
Project Number 38807.12

TABLE OF CONTENTS
SECTION 1 - EXECUTIVE SUMMARY
SECTION 2 - SUMMARY OF RECOMMENDATIONS
General
Sludge Production
Sludge Thickening
Sludge Dewatering
Dewatered Sludge Storage and Disposal
Effluent Clarification
Effluent Discharge
System Operation
Page Number
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SECTION 1
EXECUTIVE SUMMARY
The purpose of this study was to evaluate methods for reducing the
recycling of manganese at the E.M. Johnson Water Treatment Plant from the
' alum sludge waste system to the raw water pretreatment reservoir. The
initial focus of this study was to evaluate improvements for removing
dissolved manganese from the recycled waste system effluent. It -was
discovered during the study that high solids carry over from the waste
treatment system to the pretreatment reservoir also occurs. This indicated
that the waste stream was not receiving adequate clarification and the
study was expanded to include an evaluation of improvements to reduce or
resolve the high solids recycling problem.
The objectives of the study were: (1) to evaluate the benefits of
separating the settling tank alum sludge waste stream from the filter
backwash waste stream, (2) to evaluate the potential for chemical
precipitation of the manganese, and (3) to evaluate improvements for the
reduction of solids recycling.
The study included a field trial of the proposed process modifications
and a series of tests to collect data to evaluate the modifications. Based
91 on field observations and test data, the recommendations for treatment
system improvements were developed and cost i)mates were prepared.
S
The existing plant capacity is.62—.-rMGD and current plant flows
average approximately 40 MGD or 65% of existing capacity. The plant is
capable of expansion to 100 MGD in the future. The alum sludge waste
treatment system improvements recommended to be implemented at this time
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are designed for the existing capacity of�MGD. The future waste
treatment improvements required for future expansion to 100 MGD are also
discussed in this report.
A process flow schematic for the recommended improvements is included
in this section.
The conclusions and recommendations of this study are summarized as
follows:
CONCLUSIONS
1. Monitoring of the Falls Reservoir and pretreatment reservoir
water quality indicated a higher manganese level in the
pretreatment reservoir than in Falls Reservoir.
2. The higher manganese level in the pretreatment reservoir appears
to be due to recycle of the alum sludge waste system effluent,
which contains concentrations of manganese that are higher than
those normally found in the Falls Reservoir.
3. The combining of the settling tank waste stream and the filter
backwash waste stream in the existing waste clarifiers lowers the
pH of the backwash waste and causes some of the particulate
manganese in the backwash waste stream to become dissolved. This
results in a higher concentration of dissolved manganese in the
combined waste stream than in each waste stream individually.
4. Monitoring of the settling tank and filter backwash waste streams
separately indicated that the settling tank waste stream contains
higher concentrations of both particulate and dissolved manganese
than the filter backwash waste stream. The data is summarized in
the table below.
WASTE STREAM MANGANESE CONCENTRATIONS (MG/L)
Settling Tank Filter Backwash
Waste Stream Waste Stream
Average Total Manganese 7.9 2.5
Average Dissolved Manganese 4.1 1.6
5. Based on data accumulated during the early months of the study,
it was concluded that a significant portion of the recycled
manganese was due to inadequate solids removal.
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6.
Data indicates that the THM formation potential of the recycled
water is not significantly different from the THM formation
potential of the pretreatment reservoir or Falls Reservoir water.
The data is summarized in the table below.
AVERAGE THM FORMATION POTENTIAL
Water Filtered Unfiltered
Source Samples Samples
Falls Reservoir 510.03 549.59
_
Pretreatment
Reservoir 451.82 539.29
Recycle 425.86 514.23
Settling Tanks 287.70 275.10
7.
The existing clarifiers are not adequate to simultaneously
provide sludge storage, thickening, and clarification, which are
conflicting functions. This is the primary cause of the high
amount of solids recycled to the pretreatment reservoir.
8.
The sludge feed to the existing belt presses appears to be in the
optimum range for dewatering. Recent data indicates that the
presses can produce cake solids within the typical range for:J41Wi I
sludge i f properly maintained and operated. . "' -
P P Y P e rhC 5
3
RECOMMENDATIONS
- 9.
The installation of three new sludge thickener/storage tanks for
separate treatment of the settling tank waste stream is
recommended. The tanks would provide capacity for storage and
thickening of the sludge. Two tanks are adequate to provide
treatment of the total flow and the third tank would provide a
factor of safety and allow any one tank to be removed from
service without loss of treatment capacity.
10. The single existing 25,000 gallon sludge blending tank is not
adequate to serve the existing and proposed belt presses and
should be supplemented with three additional tanks. The tanks
would provide additional thickening and homogenizing of the
sludge prior to dewatering.
11. It is recommended that the City continue to dewater the sludge
with belt presses and operate the dewatering facility on a two
shift basis. It is recommended that the dewatering building be
expanded to accommodate the installation of two new 2-meter belt
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presses now and provisions to expand in the future for a total of
six presses if necessary.
12. To facilitate additional drying of dewatered sludge and provide
storage during periods when the landfill is closed, it is
recommended that two of the existing sand drying beds be paved
and used for storage of dewatered sludge.
13. It is recommended that the existing sludge thickener/clarifiers
be used for effluent clarification only.
14. The sludge removal system and the recycle pump system in the
existing clarifiers is not effective and should be modified to
provide adequate sludge removal and final effluent clarification.
A new sludge withdrawal system is recommends . /
15
. This line will be used for discharging the
waste system effluent when the concentration of manganese and/or
the potential for forming THMs are high in the pretreatment
resource. An NPDES permit should be obtained for this '
discharge. Cou�`Kv�u,
16. Additional personnel will be required for operation of the belt
presses and to dispose of sludge at the landfill and deliver
sludge to the paved sludge storage area. It is recommended that
4 people be provided initially to operate the system for two
shifts. As plant flows increase to MGD, the number of
personnel should be increased to 7 f r a two shift operation.
17 (1 Cat e C)
17. It is recommended that the City implement a new system of
monitoring and reporting data which is important for the proper
operation of the new facilities.
COST ESTIMATE
18. The allocation of City funds for this project make it necessary
to divide the work into several phases to be implemented as the
funds are available.
19. The most important items for improved operation of the waste
_ system are: the sludge thickening system, additional sludge
blending tanks, and improvements to the existing clarifiers. It
is recommended that these improvements be constructed in Phase 1
of the work. Also included in Phase 1 work are improvements to
` the existing sludge drying beds. The estimated budget for this
work is $1,689,200.
20. The work recommended to be accomplished in Phase 2 includes:
expansion of the dewatering building, installation of two new
belt presses, and construction of a new clarifier sludge
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i
r _ .
e
v
withdrawal system. The estimated budget for this work is
$1 J88,800.
21. Several items of special equipment will be needed for dewatered
sludge handling and recycled water sampling. These items include
a rubber tire loader and an automatic sampler. The estimated
budget for this equipment is $63,500.
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Y
S
SECTION 2
SUMMARY OF RECOMMENDATIONS
GENERAL
This section discusses the recommendations of the report.
SLUDGE PRODUCTION
The rate of sludge production at the plant is based in part on the
relationship between turbidity and total suspended solids. This
relationship is variable. It is recommended that the City implement a
program to collect total suspended solids and turbidity data in order to
provide a long term database to better establish this relationship
specifically for the E.M. Johnson Plant.
SLUDGE THICKENING
It is recommended that three 50 foot diameter gravity thickener/
storage tanks be installed for treatment of the settling tank waste and
filter backwash streams. The tanks would provide capacity for storage and
thickening of the sludge. Two tanks are adequate to provide treatment of
the total flow and the third tank would provide a factor of safety and
allow any one tank to be removed from service without loss of treatment
capacity. For future plant expansion to 100 MGD, one additional 50 foot
diameter tank would need to be installed.
Supernatant from the new tanks would be returned to the existing
clarifiers. It may be beneficial to add polymer, hydrated lime, or
chlorine to the supernatant to precipitate remaining dissolved manganese
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and to aid in settling the remaining solids. It is recommended that these
chemicals be field-tested to confirm the benefits and to establish the
required dosages. The existing polymer feed system in the dewatering
building will be relocated to the thickened sludge pump station for
chemical feed.
SLUDGE DEWATERING
It is recommended that the City continue to dewater sludge with belt
filter presses and operate the dewatering facility on a two shift basis.
It is recommended that two new 2-meter belt presses be installed now to
meet the needs of the existing plant's capacity of 62.5 MGD. Two
additional belt presses should be installed in the future for a total of
six to handle the sludge generated at the future plant flow of 100 MGD.
Expansion of the dewatering building will be necessary to accommodate
4
the two new belt presses. Additionally, the sludge conveyor system must be
extended to meet the requirements of the expanded facility.
Three additional sludge blending tanks and two sludge feed pumps are
recommended such that there will be one tank and one feed pump per belt
press. A new polymer batching system will be required to meet the need of
the expanded facility, and four new polymer feed pumps are recommended such
that there will be one feed pump per belt press.
DEWATERED SLUDGE STORAGE AND DISPOSAL
It is recommended that two of the existing sand drying beds be paved
to provide an area for dewatered sludge storage and additional drying prior
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.s
to disposal in the landfill. A cover over the paved storage area could be
added in the future.
It is recommended that a 1.25-cubic yard rubber tire loader be
purchased to spread dewatered sludge onto the drying beds and then to
collect and load the dewatered sludge from the drying beds onto trucks for
disposal in the landfill.
EFFLUENT CLARIFICATION
The existing clarifiers and recycle system should be modified to
provide adequate final effluent clarification and an adequate volume of
water for proper operation of the recycle pumps.
It is recommended that the eastern end of the clarifiers be modified
to function as a large wet well. It will be necessary to construct a fixed
.r weir wall across the eastern end of the two tanks and remove the center
wall at this end. The recycle pumps should be modified to operate with
level controls in the new wet well.
The existing sludge scraper equipment should be rehabilitated for more
dependable service. Improvements should include new controls and
safeguards for proper operation of the tracking mechanism.
A new sludge withdrawal system is recommended which would provide for
the controlled draw -off of sludge from each clarifier sludge collection
hopper. The new system should consist of a sludge collection channel at
the end of the clarifiers and a new sludge transfer pumping system.
- 8 -

EFFLUENT DISCHARGE
It is recommended that a f �ce main be constructed to discharge the
waste system effluent when the concentration of manganese reaches elevated
levels in the waste system effluent. Effluent should be discharged when
the concentration of manganese in the pretreatment reservoir is greater
than 0.3 mg/l and/or greater than the concentration of manganese found in
Falls Reservoir. Effluent may also be discharged when the concentration of
total organic carbon in the waste system effluent reservoir is such that
the potential for forming trihalomethanes is elevated and its concentration
is greater than that in Falls ReservoirAain
To accomplish this, it is
Q� �VV50
recommended that a j,�inch diameter A of approximately *,-SUT feet
be installed. m pia -ion---
See
opo _
4-m+nu .
. This discharge is anticipated to be used on an jVrequent basis.
An NPDES permit is required for this discharge.
SYSTEM OPERATION
Additional personnel will be required to operate the belt presses, to
dispose of sludge at the landfill, and to deliver it to the paved sludge
storage area. It is recommended that 4 people be provided initially for
proper operation of the system. As plant flows increase to.5 MGD, the
number of personnel should be increased to 7. T7
It is recommended that a program of monitoring and reporting which
will cover all aspects of the new system be implemented. Samples of the

L
f `
t
i
a
recycle water should be collected by use of an automatic sampler to provide
the best and most -reliable continuous record of recycle water quality in
the plant.
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Permit No. NCO082376
SUPPLEMENT TO EFFLUENT LIMITATIONS
AND MONITORING REQUIREMENTS
SPECIAL CONDITIONS (Continued)
CHRONIC TOXICITY PROTECTION
The Permittee is required to comply with 15A NCAC 2B.0208(a), which requires that toxic
substances shall not render waters injurious to aquatic life or wildlife, recreational activities,
public health, or impair the waters for any designated uses. To protect aquatic toxicity, the
concentration of substances shall not be such as to result in chronic toxicity.

Division of Water Quality
May 14, 1998
MEMORANDUM
To:
Jeff Myhra, Environmental Engineer
NPDES Unit
Through:
Judy Garrett
C13
Regional Water Quality Supervisor, RRO
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From:
Susan Wilson, Environmental Engineer
LO
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Raleigh Regional Office
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Subject:
J
City of Raleigh, E.M. Johnson Water Treatment Plant
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Draft Permit Comments
Permit No. NC0082376
Wake County
Attached for your review is the Raleigh Regional Office's comments on the City of Raleigh's
E.M. Johnson Water Treatment Plant.
In the City's response to a prior Notice of Violation, the RRO discovered that several "non
stormwater" drains are tied into the stormwater/groundwater discharge point prior to outfall 002.
The "non stormwater" drains tied into the "stormwater/groundwater" outfall are filter flume drain,
pump wet well, venturi vault (stormwater), and raw water reservoir drain. I met with Mr. John
Garland, Water Treatment Plant Superintendent, May 13, 1998 to clarify the "non stormwater"
discharges to this outfall and the frequency of the discharges. Per Mr. Garland the filter flume
drain has not been drained since 1982, and would require a complete shutdown. The pump wet
well has been drained approximately I/year. The reservoir overflow drain is capable of draining
the entire reservoir and is of the most concern; only during an emergency event would this
discharge outlet be used. Because these discharges will only be released periodically, the RRO
does not recommend designating this as a separate outfall with weekly monitoring requirements.
However, the RRO requests that the following special condition (or similar version) be inserted
into the final permit:
Should the E.M. Johnson plant discharge wastewater from the filter flume drain, pump
wet well, and / or the raw water reservoir drain, the Raleigh Regional Office must be
notified. Additionally, during the drainage time, the stormwater/groundwater outfall
should be monitored daily for those parameters specified for outfalls 001 and 002 until
such time that the drainage ceases.
Should monitoring of the stormwater/groundwater outfall indicate exceedances of the
limited parameters given in outfalls 001 and 002, the Division of Water Quality may
require that this outfall be designated as an effluent outfall or that this drainage water be
rerouted through the existing backwash treatment system.

A,gi,
e City has indicated in their response to the Compliance Evaluation Inspection that they wish
to retain outfall 001. Please note that the map submitted with the draft permit indicates outfall
002 at the wrong location. Outfall 002 is at the filtration plant (see staff report).
f This office has corresponded with the City on several occasions and stated that disposal of
chemicals via the sand drying beds is not a permitted activity. However, correspondence from
Mr. Crisp does not imply total agreement with this concept [ref. response no. 8, attached]. This
office knows of no other way to make it clearer to the City. The RRO is unsure if the statement
"There shall be no discharge of waste chemicals that do not directly result from the responsible
treatment of raw water" really clarifies the issue. Please state in the letter with the final permit
that only those activities described in the supplement to permit cover sheet are permitted. With
that regard, you may wish to modify the supplement page to include "...sand drying beds (one
half used for spill containment purposes and incidental stormwater, another half used for
residuals stockpiling, with filtrate routed back through the backwash treatment system)."
Also, please note in the final letter to the permit, or as a special condition, that the City must
comply with 15A NCAC 2B .0208(a), which requires, in summary, that toxic substances shall
not render waters injurious to aquatic life or wildlife, recreational activities, public health, or
impair the waters for any designated uses. This may help clarify Mr. Crisp's confusion that the
treatment plant may discharge any compor�nd associated with the treatment of raw water as long
as the limits presented in the permit are 9 mplied with.
Should you have any questions, plea( contact me at 571-4700.
aMAXU
A�

Micheal Allen with NCDWQ Non -discharge Permitting Unit by
telephone as you suggested, and confirmed with Mr. Allen that
such a NCDEH permitted operation as R T Soils is deemed
permitted by DWQ, as disposal of the City's alum based water
plant sludge in a DEH permitted landfill was in the past.
4. The water plant staff will test and calibrate the effluent
flowmeter at least annually and will maintain records of all of
the calibrations. The flow meter was last calibrated when it was
installed in 1994; however, the flow meter was calibrated after
receiving your letter on April 10, 1998 and was found to still
be within the acceptable range of accuracy. The water plant
staff have contacted the effluent flow meter parshall flume
manufacturer about the addition of a staff gauge. The staff is
proceeding with the purchase and installation of the staff
gauge, as you recommended.
7. The City's NPDES permit for this facility is currently due
for renewal. In the renewal request submitted by the City
October 7, 1997, we requested that the current permit be
reissued as it currently exists with two discharge locations.
DWQ has not yet re -issued this NPDES permit for extension. It is
unlikely that the City will use discharge location #001, but we
do wish to retain it in the renewed permit, in case the City's
East Raw Water Reservoir at the Johnson Plant site must ever be
drained for maintenance or repair purposes.
8. The City, on it's own initiative, developed a spill
prevention plan and constructed facilities several years ago, to
prohibit any accidental discharge of chemicals or petroleum
products due to a leak or a spill at the Johnson Water Plant
site. This information has been previously provided to DWQ (Ken
Schuster) as recently as January, 1998. I have enclosed with
this letter another copy of the spill containment map and
associated narrative memo. The City is not aware of a permit
condition or regulatory requirement to develop or provide the
information that you have requested, but we are pleased to do
so. The chemicals which the City's containment plan is intended
to contain are all chemicals approved for use in drinking water
treatment and many are frequently used in wastewater treatment.
Examples are chlorine, sodium hydroxide, lime and potassium
hydroxide. TThe City staff understands it's responsibility to
properly monitor the use of these chemicals, spilled or not, to
insure that water quality violations do not occur. If water
treatment chemicals or fuel are spilled� at the water plant, DWQ
staff will be notified. However, the City reserves the right to
manage the water and wastewater treatment facilities at the
water plant as the staff and City procedures and policy deem
appropriate, so long as that operation is within the conditions
and requirements of the appropriate federal and state operating
permits] As we have previously indicated, this includes the use
of the "old sand drying beds" as modified to function as a
chemical spill containment basin.

AM
NCDENR
JAMES B. HUNTJR.
GOVERNOR -.
WAYNE McDEVITT
SECRETARY
MDA C. SMALL
DIRECTOR
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF ENVIRONMENTAL HEATH
PUBLIC WATER SUPPLY
MEMORANDUM
TO: David Goodrich
Discharge Permits Unit
Division of Environmental Management
FROM: Linda Sewall`
Division Director
Division of Environmental Health
DATE: April 30, 1998
MAY 0 8 1998 Db
POINT SOURCE BRANCH
SUBJECT: Draft National Pollutant Discharge
► `#'= ' Elimination System Permit #NC0082376
x " E.M. Johnson WTP
> r
Wake County
i Reference is made to the above mentioned Draft National Pollutant
l _ e
Discharge Elimination System Permit. We have reviewed this permit
lz,
application and determined that the proposed discharge will not be
sufficiently close to any existing or known proposed public water supply
intake so as to create an adverse effect on water quality.
w
We concur with the issuance of this permit provided the facility is
-z operated and maintained properly, the stated effluent limits are met prior to
E
` discharge, and the discharge does not contravene the designated water
quality standards.
If we can be of further assistance, please contact us.
LS/WAH/ncp
cc: J. Wayne Munden
k Michael L. Douglas
0600 BARRETT DRIVE, SUITE 101, RALEIGH, NORTH CAROLINA 27609
PHoNEDIP-571-4700 FAX9I9-571-4718
- AN EQUAL OPPORTUNITY /AFFIRMATIVE ACTION EMPLOYER - 50% RECYCLED/10% POST -CONSUMER PAPER

NO M1CaO]6 tk in Jon stq County Pw tl of Comm ss one s, Pos Ol a vox 10.16 Smithlie t ,1571 has called fore permit'erer.cl for a lac f ly loomed at the Cenim; Jphn5lPn Count
T 0 ,i' 1 gppf 5 ,rl J M151onC '.T i I' En ttll5tnpr9e .��L-lremeC C:m?<LC OrC-'Icvslr cn•CileV ate•flout OnepUtf011 into theN^USp Ri,,,n,.Clp;
\ \I' .EC tf_[5 B C spV nC. e. _ 0 1 941-,BDD-OTmOnIC 1oC I;kov.ICh D: .oj Iola anCsanOJUS ye501Ved bXVgeh Gev:atergU011M lmilea. Fpr ontl.
Cf Me l le Inc I.O.C" P 1i mrnecialE race nF Clef wi l l ne consumed.Tole may CH<C' v,Ctef qualr baiea efro'm milati0'151pratldiOxygi C:nprgerswl inlet titan of In
lµl
I c n 0 Cel o v e Inz. of NIX_ Past Office Box 2407C: Cnorlotlo. NC 2M me Damon, for c permit renewal for P facility 10ca1 ASNay HIP$ Su rvision, o NCSR 2P:
sa c Y-+ fit ael4c- o Tnr ors to s012> IJGD of treated comeslic wastewater from one 0utfallimo �oplpr Creex,aC ass GNSW 5lream m the Neuse River Basin which hasa]Ol
ho e r The to' �c a -.,=s ,ant cooacin loC.250MGD BOD. ammonio,total residual cnlorinecnodissolved oxygenate Mnerquality limilec. For sameon rameI.ers,iCheas a 701
loac mob.. t o me m, tc p re \ .- \ lh be consume[ Tnis mat' Pried future water quality Pasea efflvcm hmilotiom for additional dischargers wit I hi ro �0 1 tershe[
6, NPDES No. NC006 7Tt, L o Lee anc ass: b1 5. PO 6oz ]c: Wake For 11, NC 27587 has applied for a Permit renewol for o f.cilih, lormen m noor rm..e c ,en:..I
Water WIII be consUmen. tons matonec- iVtlRe worst quality Posed effluent limitations for OC
9. NPDES No. NCDW60E. Word Transformer Company, PO Box 3000E Raleigh, NC 27612 has aoplie
The facdlly d,schorpes O.Ov MCD of ireote. naisiriol waslevleier from one ouffoll into on unnometl
cis and 0 3002 flow of 6 cfs. No Parame•ers ore water quolily limited, bell this d:saarge may
10. NPDES No. NCDD62219. Carol ino Water Service Inc. of N.C.. Post Office Box 24075. Char lone NC
25E. southwest of ShmweH. Wake County.7 ne facility currently tlischorges 0.070 MGD of lremeo dor
the Neuse River Basin within nos a 7010flOv. 010 cis and o3002f10w 00.08 cts. Thetocility is oermitte
are water qual ity, limited. For so me DOroneler5 then co lob a load capacity Of the immediate receiV',
dischargers within this Portion of the watershed.
11. NP D ES No. NC0065714. Trodewinds Homeowners satiation, Inc., 302 Peeble Creek Drive, NC 27
of Wake C rogroods. Wake County. The Facility discharges 0.050 MGD of treated domestic wastewat
too. of1.1 cis. Ammonia is water quality l i mired. For some parameters, the dvoIt isCitytmlon: for additional dischargers within this Portion Of th¢ watershed. a I
1_2, NPDES No. NCOO6a40E.Whitewood Properties, Inc.dWNeuse Crossin-Utilltvtd W.C. tPO Be
wostevlate, Trealmem Plant, exeuse Crossing Subdivision, nortneasl of Raleigh, off MitChell MITI Re
. rheesl,c wastewater iron one nutfall into Neuse River, a Class GNSW stream in the Neuse Rivers
Forsome oprometers. tosavoilable load capacity of the immediate receiving water wl0 be consume
j vor;ian 0I the watershed. W/K/VwxJTd-.
1 13. NPDES No. NCD06410. Jones Dairy Form Ui lities,Inc., PO Box 1108 Woke Forest, NC 27587 has
P. act. Wake Forest, Wake County. The foci l it, currenly discharges 0.09 MGD of treated domestic we
7010 flow of 0. 15 cis. BODE 5, ammonia, one d solved oxygen ore wmet quoin Y-limiled. For these,
often future water quality based effluent limitations for additional dischargers within this port
14. NPDES No. N00031011. Colonial Pipeline Company. Post Office Box 18403. Greensboro, NC 2741
nor l0510f SFimo,Johnston Courti, Thefecifty i5cermittetllPdisCna,ge, slofmgwmer,washwmer.
. stream In Me Neuse River Basin. For some odremerer , theavai'IpbIF Ir 0000acity of Ine immetliat
atltlitianal tlischorgers within this portion o, Ins watershed. l/'iI(M/�
15. NPDES No. NCO027006. Exxon Compcnt, 11SA, 2555 west On, Streeh Selma, NC 2]5]6 has applii
Johnston Counly. The facility is Permitted Ic c's;narge stormwmer, Wosnwater, ontl nvotestatic test
River Basin. Forsomepar.meters, the v ,� -' lone cOPOcity 011ne Immediate recewing water will
within this Portion o! ine wme'sned. L' � �/ -
16. NPDES No. NC0065706. Crosby Utilities IrtarpOrmed 2117 Averelte Rmd, Woke Forest. NC 275
north of Poole Rood on Bethlehem Rood, Kn,F•nwle, NC in Wake Counly. The facility discharges 0.00
Neuse River Basin which has o 7010 How of C.3i Js. BOD, Cmmoroe an dissolved oxygen ore water q
be Consumed. This may amen future Wme' quality based eHlveni IITIIali0n5 for additional disc
17. NPDES No. NCOD03549. Ameratlp Hess Corporation, 1 Hess Plaxc. Woodbridge. kJ moil he, neat
a
may affect future water quality
I for a Permit renewal for is tacit
or from one overall into Auslin C,
hers. ineavailable loan capacity
gets Watershed. &1A4Cr-
Called for a Permit renewal for
CrCstatic lest wine, from one out
vine waler will M consumed. Th
I Permit renewal for o facility h
rom one outfoll info on unnamed
:umec. This may affect future wl
opolied for a permit renewal for
of treated domestic wastewater
belied. Farthest PCmmelers. a
rs within this PO,llon of the We
P permh renewal for ellnrili v if
10. NPDc$ No, NC004903a. County of Woke, W Ohe ceULiy fsll. Auburn Sheriff's Training Center, PO Box 550, Raleigh, NC 27602 t
Aubum Training Center on NCSR 1004, east c! Avourn, Wake Count. The loci lily dische roes 0.OD24 MGD of treated poorest is was
Class GNSW stream Intl [apOCItY Of the in the Neuse River 6as;n v: n ,h nose 7010 Lon of 0 cts one a 3002 flow of 0.02 cis. BODE, ammonia ontl Chose
immediale receiving water will be consumed. This may affect future water plicitly based effluent.) T
19. NPDES No. NC0064378. Conelinq Water Services, Inc., M N.C.. Past Office Box2407U Chor;olte, NC 20224 has applied to,M,aa n
NCSR 1004, northwest Of Clayton, Wake Count,. The facility currently discharges 0.03 MGD of treated domestic vm5leymer from c
- NSW stream hither Neuse Rive. 5osin when r,:s 0010feew. of 0 CisanOo3002 howof0.0_ cis. The facility is Perre to tncreas
'F dissolved oxygen are water quolily Ilmilend r0- some Parameters, me ovailobjf land Capacity of the Immediate receiving war
'- limitations for addition, dischargers w'imir. MIS Portion of the watershed.
20. NPDES No. NC0080519. Lamaeond MalPhIvs Lumber Company, formerly Guy C. Lee Lumber Co., PO Bcx 150. Smithfielc, N
Tents Street Smithfield, Johnston County. Tr-'.ci I Ilv dischorge-industrial wOsievmler from wet decking tccilllies inrough two(
in the Neuse River Basin. No Parameters Or2 were, aumily Lmiteo, but Tnis mscnarge may affect future PII.cm Tars. e
11, NPDES No, NC0021227, Crown Central Pe7Meum Camormion, One North Cleric, Sweet Post Office Box 1111. 5ollimorc, Mar
Termihc;, on West OOk Street, northwest of 5eima, Johnston Counly. The locilily is Permitted to discharge 5lorm.cler and hyar,
River, O Class W'S-W NSW stream in the Neuse River Basin which has a ]Oi0 flow of Dots and 0=2 flow of 0 cis. No parameters c
22. NPDIEE No. NCO036764. Mr. Thomas Tilley, Poole Rootl, Raleigh, NC 77514 has applietl for a Permit renewal for 0 facility Loci
Raleign, Wake County. The foci l,tv discharges CA35 MGD of tremetl dourest is wastewater from one omfoll ine the Neuse River, c
from Falls Lake Dom. No Parameters are water quality limited, but this dischargE may affectfuture allocations. MCI,
23. NPDES No. NC0112545. The Town of Cloynon. PO Box 09, Clayton, NC 27520 has owned for a permit renewal faro facility to
County. The facility discharges l 9 MGDof treated domestic and industrial wastewater from one Cuticle into the Neuse River, a Oa!
186 cfs. BOD5, ammonia, dissolved Oxygen, Potential residual chlorine are water qua lily limited. For same parameters, the evoi In
may affect future water quality based effluent limitations for oadifional dischargers within this portion of me wolerined. l
2i. NPDES No. NC0036145 6P Oil Compam, 20E loll. Square, Clevebod 0
the Neuse
Johnston County. The facility is Permitted to discharge stormwmer. v
lets Neuse River Basin which has a 7010 how, o! C' cis and d 3002 flaw of 0 cis.
.a.- gallp' hosed effiven' IimilelionE tie- ddd9ionoi dischargers r,ilhin
26, N'POEF Nc NCC05337d ..: R^r lP; °: .59C. Roorl Rooeipc, N
I KaackCltcln yfale CPUnl1'. Tne mer trenlmen' en,ku
a5
--- -- .---• ..,,. .,„ lutge me, pnen suture .......ions. I" L I h
28. NPEES No. NC0052311. William Energy Ventures, Inc., Post Office Box 70, Tulsa, OK 74101.007D It
the Neuse st ORivem Basin which has o 7010 flowyis of 0!cis Ltted and 003007 flow Of 0 ns f No Parameters o
19. NPDES No. NC000752. Town of Woke Fares:, 4m Elm Avenue, \Hoke Forest NC 27587 has applied to
We
eke Forest Woke Counly. The
lacilior tlischorges filter backwash from one ouftall into Smith Creek,
diedhonce on alien future allocations. WL�ts aw
30. NPDES No. NCWT331 E. ra D. Lee and
Ass::iaee Inc.. PO Box 7u2. Vtaxe Fares'., NC 27587 has OOP;
is 1.81I Rwtl;NC-c.:_:„\;ai:e Fore;: ,•Dice County. Tne tn:iiily current mscno,ges0.050MG1
.eess GIJSYy Stream in 'me
Neuse River 6
a5ir, v:nich has a 7010 flow al 015 cts. BOD, ammonia and di
Immediate receiving wmer Wii be Consumed. This m0Y aflMi future water quality hosed effluent
1 31. NPDES No. NC0060771. Bannister antl Glover Properties, Intllan Creek Overlook, 17131ntlian CreE
Overlook. NC Highway 5o, noor Garner. Wake Cauniv. Tne mcility discharges 0.064 MGD m treated don
Creek o Cims C. NSW stream to the Neuse River Basin which has o 7010 flow of 0.90 cis. BODS, ammonia
the i PDESmoreeto receiving water Will ce consumed. This may a}left future water quality based effl4
32. it
County
The
oil Town m Smithfield PO Box ]6L Smithfield, NC 27577 has applied for 0 per
Johnston County. The facility tlischorges ttlferbockwosh water from one ouftall Into Buffalo Creek, a
tlis[herq! may often future allocat Ions.
1 b3. NPDES No. NCOU32875 Phillips Pipe Lt company, 370 Adams Building, Bartlesville, OK 74M ha,
Ilnorthwest of Selma Johnston County. The facility is cermimetltp tlischarg!stormwmer and hydrostatic
e Neuse River Basin which has a 7010 }low of 0 cis and a 3002 flow 1 0 Cie. No Parameters are
may
Dairy Form. Subdivision. Jones Dairy Farm
sl ream in ire Neuse River Basin which tees a
receiving water will be consumed. This may
may
fora
a
has applied for a permit renewal for a facility located of 21D North
into an unnamed tributary to Sufimo Creek, 0 Class GNSW stream
NCSR 1D07 (Poole Rood), east of
Basin which has. repmmetl flow
water I
Ipued for a Permit renewal for a facility located on Falls of Neuse Rood. Raleigh, Wake County. The
Iss C-NSW steam in the Neuse River Basin which has a regulated flow fromthe Falls lake dam. No
cscached for a Permit renewal for a facility located at Selma Products Terminal, Highway 1928,
I waterfront one ouffoll info on unnametl h ibut.ry lothe Neuse River, Class WS-IV NSW stream in
e water quality limited, but this discharge may affect future allocations.
r o permit renewal fora facility locotetl m Wake Forest WaterTreatment Facility. 1143 Wail Avenue,
a Class C-NSW stream in the Neuse River Basin. NO Parameters ore wafer quality limited, but,
his
ledfe-Cne•m^ renePT' brafacilitY IPCPI<dm Whiny milt Vnllpv Wnrbwnter Trpnlmpnl Plant
:n are wmer gv0l try Ilmlle i. rar some Parameters, me OVoeeOle IWO COPOCiIy 01
r odditionol dischargers within this Portion of the watershed. M[fn.11.
facility located of Smithfield Water Treatment Plant on 2nd Street, Smithfield
im in the Neuse River Basin. No Parameters are water quality limited but this
nil renewal for o facility located an Selma Terminal, On Highway 1003 and 1929,
'0 autfalls into on unnamed tributary to Mi ll Creek, a Class WS-�IVNg5Wstream in
flied, but this discharge may affect future a110calions.0 6L4je-'•
, locotetl of the Johnston County Water Treatment Facility, 600 Clearwater Drive,
cry 10 the Neuse River, P Class WS.IV NEW CA stream in the Neuse River Basin.

� NE
OBSE R
ACCOUNT NUMBER
73370150
DATE BILLED
04/18/98
BILLED TO:
Inwice
for
LEGAL ADVERTISING
ACCOUNT NAME
NC DEPT-OF EHNR
NC DEPT OF QEHNR
DIV OF WATER QUALITY BUDGET E
PO BOX 29535
ATTN: FRANCES COTTEN
RALEIGH NC 27626-0535
q04
INVOICE NR PUBLICATION DATE DESCRIPTION SPACE
TCB9YK401 04/18/98 PUBLIC/ NPDES PERMIT (34)/ P1128.OL
INVOICE AMOUNT DUE
remit to:
LEGAL AIR DEPT.
P.O. BOX 2885
RALEIGH, NC 27602
FOR CUSTOMER SERVICE:
829-4668
EL E" I V E D
MAY 1 1498
DWO BUDGET OFFICE
1 .IENT
RATE COST
2.90 3,271.20
$3,271.20
RETURN REMITTANCE COPY WITH PAYMENT

DENR/DWQ
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
NPDES No. NCO082376
'Far, ` X
(1.) Facility Name:
Raleigh WTP
(2.) Permitted Flow:
Not Limit
(3.) Facility Class:
II ( RRO
Recommended)
(4.) Facility/Permit Status:
(i.e. New, Modification,
Existing or Renewal)
Renewal
tieam . ,-- b
(1.) Receiving Stream:
UT to Neuse Rig
(2.) Stream Classification:
C-NSW (001)
WS-IV-NSW-
CA (002)
.) rcegionai orrice: rcaleign
.) USGS Topo Quad: D24NE
kcterstcs
001) and UT to Honeycutt Creek (002)
.) Winter 7010 (cfs): I N/A
ki.) JuDDasln:
U3-U4-UL
( /.) Juk2z (CIS):
N/A
(4.) Draina a Area (mi ):
N/A
(8.) Average Flow (cfs):
N/A
(5.) Summer 7Q10 (cfs)
N/A
(9.) IWC (%):
N/A
Changes Incorporated into Permit Renewal
Fro osed ..Clari�` es:.
Parairieters...Affected ::.
Basis .:for changes)
Cover Page
Revised expiration date of
Revised as per current SOP
ermit (now expires 2-28-03)
Supplement To Permit Cover
Revised plant description
Revised as per region
Sheet
recommendation
Effluent Limitations and
Added note to effluent page
Added as per Region
Monitoring Requirements
indicating that no discharge of
recommendation
Page
waste or spilled chemicals
shall occur at outfall 001 or
outfall 002.
Effluent Limitations and
Drafted effluent page with TN
Revised as per current Neuse
Monitoring Requirements
and TP monitoring
River Basin Management
Page
requirements
Strategy for facilities with no
permitted flow.
Special Conditions
Added special conditions A.(2)
Added as per current Neuse
and A.(3).
River Basin Management
Strategy for facilities with no
permitted flow.
Summary
Facility has requested a permit renewal with no modifications to the existing facility
operations.
Page 1
Version: April 3, 1998

DENR/DWQ
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
NPDES No. NCO082376
Region offered the following comment in reference to the permit renewal:
1.) Spilled materials should not be discharged through the effluent outfall
unless appropriate limits are established.
A note stating "There shall be no discharge of waste or chemicals that do not
directly result from the responsible treatment of raw water" was included on
the effluent Page.
2.) The city should not be allowed to discharge waste or spilled chemicals that
do not result from the treatment of raw water.
A note stating 'There shall be no discharge of waste or spilled chemicals that
do nottresult from the ^treatment of raw water" was included on the effluent
Page. t'A t A s bk
3.) Due to HB 515 and the fact that this facility discharges into Falls Lake, the
Division may wish to require the city to monitor for NH3-N to determine
possible nutrient impacts.
The monitoring requirements for the Neuse River Management Strategy will
cover nutrient monitoring.
4.) RRO recommended that we include a condition in the permit requiring
them to perform upstream monitoring at a feasible location upstream of the
discharge.
Effluent monitoring page was revised as requested.
5.) If the city plans to discharge spilled chemicals, there must be limits in the
permit for these materials. The NPDES permit does not give them free reign
to discharge any spilled chemical if "there is no limit in the permit." The city
should be required to submit a Spill Prevention Containment and Cleanup
Disposal Plan.
This requirement will be covered in the draft permit cover letter.
6.) RRO recommended that the need for outfall 001 should be confirmed prior
to permit issuance.
This requirement will be covered in the draft permit cover letter.
In the renewal request, the facility indicated that the chemicals used at the
water plant as a coagulated aid have changed. The city now uses ferric sulfate and
aluminum sulfate. Other chemicals used at the plant in the drinking water
treatment process include: sodium hydroxide, potassium permanganate, calcium
Page 2
Version: April 3, 1998

6)
007
DENR/DWQ
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
NPDES No. NC0082376
carbonate, power activated carbon, sodium hypochlorite, hydroflourosilic acid,
and ammonia.
It is recommended that the permit be renewed as drafted. Region please
comment on any additional special conditions required as per the comments
addressed in the staff report.
Proposed Schedule for Permit Issuance
Draft Permit to Public Notice: 04-22-98
Permit Scheduled to Issue: 06-08-98
State Contact
If you have any questions on any of the above information or on the attached
permit, please contact Jeff Myhra at [phone], extension 597.
Regional Office Comments
Signature:
Regional Recommendation bv: ,, &L goe.S/
Reviewed By:
Sig ture:
`
Regional Supervisor:
�Date:
Signature:
llate
NPDES Unit:
Page 3
Version: April 3, 1998

SLUDGE
THICKENER/STORAGE
TANKS
PDGE
UMP
STATION
!uso
RAW WATER
FROM PRETREATMENT
=qRK
DECANT
SPUTTER
BOX
I jl
DECANT
POSSIBLE FUTURE
CHEMICAL ADDITIONS:
LIME OR CHLORINE
FILTER PLANT I N
Lm m N
SLUDGE
CHANNEL W/�
TELESCOPING
VALVES
FINISHED WATER
CLARIFIERS
(SOUTH)
WEIR WALL
DRYING BED EFFL.
DECANT SLUDGE TRANSFER PUMPS POSSIBLE FUTURE
COVER OVER
BLENDING TANK EASTNG SAND
w
DRYING BEDS
u
J I
19
POLYMER
BATCHING TEMPORARY
SYSTEM SLUDGE SLUDGE STORAGE IN
FEED PUMPS EIS BEDSRYING
SLUDGE SFP
E3.ENDING
TANKS
SLUDGE SFP
CONDITIONING
SYSTEM BELT FILTER PRESSES
SFP
BELT PRESS FILTRATE
0
LEGEND
E0STING FACILITIES
RECOMMENDED IMPROVEMEM
TRUCK TO LA OR TO
TDaPORARY SLUDGE STORAGE
E.M. JOHNSON WATER TREATMENT PLANT
RECOMMENDED PROCESS FLOW SCHEMATIC FOR ALUM SLUDGE THICKENING
AND DEWATERING FOR 62.5 MGD CAPACITY
Pledumat oben Inc
Engineers Architects Planners