WQ0002708_Final Permit_20200504

ROY COOPER
Governor
MICHAEL S. REGAN
Secretary
S. DANI£L SMITH
Director
NORTH CAROLINA
Environmental Quality
May 4, 2020
CHRIS PHELPS — WASTEWATER TREATMENT PLANT SUPERINTENDENT
CITY OF RALEIGH
POST OFFICE BOX 590
RALEIGH, NORTH CAROLINA 27602-0590
Subject: Permit No. WQ0002708
Wrenn Road WWTF
Wastewater Irrigation System
Wake County
Dear Mr. Phelps:
In accordance with your permit renewal request received November 6, 2019 and subsequent
additional information received February 12, 2020, we are forwarding herewith Permit No. WQ0002708
dated May 4, 2020, to the City of Raleigh for the continued operation of the subject wastewater treatment
and irrigation facilities. Please note that this renewed permit shall become effective on July 1, 2020 (i.e.,
the day after the expiration date of the existing permit).
This permit shall be effective from July 1, 2020 through September 30, 2026, shall void Permit No.
WQ0002708 issued July 14, 2015, and shall be subject to the conditions and limitations therein. The
Permittee shall submit a renewal application no later than April 3, 2026.
Please pay attention to the monitoring requirements listed Attachments A, B, and C for they may
differ from the previous permit issuance. Failure to establish an adequate system for collecting and
maintaining the required operational information shall result in future compliance problems.
The Division has removed the following permit condition since the last permit issuance dated
July 14, 2015:
➢ Old Condition 1. 1. — The flow measurement device has been installed.
➢ Old Condition L3. — A residuals source certification package was sent to the Division May 23,
2016.
➢ Old Condition VL2. — This condition has been removed because the permit is not voidable.
The following permit conditions are new since the last permit issuance dated July 14, 2015:
➢ Condition IIL 16. —Requires metering equipment to be tested and calibrated annually.
➢ Condition IV.10.b. —Requires the date of irrigation equipment calibration to be recorded in the
maintenance log.
➢ Condition VL 10. —Prevents this permit from being renewed if the Penn ittee or any affiliation
has not paid the required annual fee.
D E Qom, _ North Carolina Department of Environmental Quality I Division of Water Resources
v��}/� 512 North Salisbury Street 1 1617 Mail Service Center I Raleigh, North Carolina 27699-1617
N(1HTH (:A�i(11_INA
0­O'torF'WM'"'WQualify 919,707.9000

Mr. Chris Phelps
May 4, 2020
Page 2 of 2
➢ Attachment A — Total Residual Chlorine has been added to the required effluent monitoring
parameters because this system utilizes a sodium hypochlorite disinfection system that may
result in a chlorine residual.
➢ Attachment A - Total Nitrogen has been added to the required effluent monitoring parameters
in lieu of Total Ammonia Nitrogen, Total Kjeldahl Nitrogen, and Total Nitrate Nitrogen as
these are only seen in small concentrations at this facility.
➢ Attachment A - Total Phosphorus has been added to the required effluent monitoring
parameters to use in concurrence with the groundwater data to track phosphorus leaching.
➢ Attachment C —Total Phosphorus has been added to the required groundwater effluent
monitoring parameters in an effort to track phosphorus leaching statewide.
If any parts, requirements, or limitations contained in this permit are unacceptable, the Permittee
has the right to request an adjudicatory hearing upon written request within 30 days following receipt of
this permit. This request shall 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 at 6714 Mail Service
Center, Raleigh, NC 27699-6714. Otherwise, this permit shall be final and binding.
If you need additional information concerning this permit, please contact Nathaniel Thornburg at
[phone] or nathaniel.thomburgkncdenr.gov.
Sincerely,
S. Daniel Smith, Director
Division of Water Resources
cc: Wake County Health Department (Electronic Copy)
Raleigh Regional Office, Water Quality Regional Operations Section (Electronic Copy)
Laserfiche File (Electronic Copy)
Digital Permit Archive (Electronic Copy)

NORTH CAROLINA
ENVIRONMENTAL MANAGEMENT COMMISSION
DEPARTMENT OF ENVIRONMENTAL QUALITY
RALEIGH
WASTEWATER IRRIGATION SYSTEM PERMIT
In accordance with the provisions of Article 21 of Chapter 143, General Statutes of North Carolina as
amended, and other applicable Laws, Rules, and Regulations
PERMISSION IS HEREBY GRANTED TO
City of Raleigh
Wake County
FOR THE
continued operation of a 704,618 gallon per day (GPD) wastewater treatment and irrigation facility
consisting of
an influent splitter box; an influent pH meter; an influent flowmeter; a 25-acre 80 million gallon (MG) clay -
lined gravity -thickening lagoon with a baffle curtain, staff gauges, and a concrete/fabric apron; a back-up
25-acre 80 million gallon (MG) clay -lined gravity -thickening lagoon with staff gauges and a concrete/fabric
apron; a liquid sodium hypochlorite disinfection system including three 15-gallon double -wall poly tanks;
an irrigation pump station with four 100 horsepower (hp) 1,500 gallon per minute (GPM) vertical turbine
pumps; a 268.68 acre spray irrigation area; and all associated piping, valves, controls, and appurtenances
to serve the Wrenn Road WWTF, with no discharge of wastes to surface waters, pursuant to the application
received November 6, 2019, subsequent additional information received February 12, 2020, and in
conformity with the Division -approved plans and specifications considered a part of this permit.
This permit shall be effective from July 1, 2020 through September 30, 2026, shall void Permit No.
WQ0002708 issued July 14, 2015, and shall be subject to the following conditions and limitations:
I. SCHEDULES
1. The Permittee shall request renewal of this permit on Division -approved forms no later than April 3,
2026. [15A NCAC 02T .0105(b), 02T .0109]
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IL PERFORMANCE STANDARDS
The Permittee shall maintain and operate the subject non -discharge facilities so there is no discharge to
surface waters, nor any contravention of groundwater or surface water standards. In the event the
facilities fail to perform satisfactorily, including the creation of nuisance conditions due to improper
operation and maintenance, or failure of the irrigation areas to assimilate the effluent, the Permittee
shall take immediate corrective actions, including Division required actions, such as the construction
of additional or replacement wastewater treatment or disposal facilities. [15A NCAC 02T
.0108(b)(1)(A)]
2. This permit shall not relieve the Permittee of their responsibility for damages to groundwater or surface
water resulting from the operation of this facility. [15A NCAC 02T .0108(b)(1)(A)]
3. Groundwater monitoring wells shall be constructed in accordance with 15A NCAC 02C .0108
(Standards of Construction for Wells Other than Water Supply), and any other jurisdictional laws and
regulations pertaining to well construction. [15A NCAC 02C .0108]
4. Effluent quality shall not exceed the limitations specified in Attachment A. [15A NCAC 02T
.0108(b)(1)(A)]
5. Application rates, whether hydraulic, nutrient, or other pollutant, shall not exceed those specified in
Attachment B. [15A NCAC 02T .0108(b)(1)(A)]
6. Wastewater irrigation fields permitted on or after December 30, 1983 have a compliance boundary that
is either 250 feet from the wastewater irrigation area, or 50 feet within the property boundary,
whichever is closest to the wastewater irrigation area. Any exceedance of groundwater standards at or
beyond the compliance boundary shall require corrective action. Division -approved relocation of the
compliance boundary shall be noted in Attachment B. Multiple contiguous properties under common
ownership and permitted for use as a disposal system shall be treated as a single property with regard
to determination of a compliance boundary. [15A NCAC 02L .0106(d)(2), 02L .0107(b), 02T .0105(h),
G.S. 143-215.1(1), G.S. 143-215.1(k)]
7. The review boundary is midway between the compliance boundary and the wastewater irrigation area.
Any exceedance of groundwater standards at or beyond the review boundary shall require preventative
action. [15A NCAC 02L .0106(d)(1), 02L .0108]
8. The Permittee shall apply for a permit modification to establish a new compliance boundary prior to
any sale or transfer of property affecting a compliance boundary (i.e., parcel subdivision). [ 15A NCAC
02L .0107(c)]
9. No wells, excluding Division -approved monitoring wells, shall be constructed within the compliance
boundary except as provided for in 15A NCAC 02L .0107(g). [15A NCAC 02L .0107]
10. Except as provided for in 15A NCAC 02L .0107(g), the Permittee shall ensure any landowner who is
not the Permittee and owns land within the compliance boundary shall execute and file with the Wake
County Register of Deeds an easement running with the land containing the following items:
a. A notice of the permit and number or other description as allowed in 15A NCAC 02L .0107(f)(1);
b. Prohibits construction and operation of water supply wells within the compliance boundary; and
c. Reserves the right of the Permittee or the State to enter the property within the compliance boundary
for purposes related to the permit.
The Director may terminate the easement when its purpose has been fulfilled or is no longer needed.
[I5A NCAC 02L .0107(f)]
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11. The facilities herein were permitted per the following setbacks:
a. The irrigation sites were originally permitted May 31, 1988. The setbacks for spray irrigation sites
originally permitted or modified from October 1, 1987 to January 31, 1993 are as follows (all
distances in feet):
I.
Each habitable residence or place of assembly under separate ownership:
4001° 3
ii.
Each private or public water supply source:
100
iii.
Surface waters:
100
iv.
Groundwater lowering ditches:
100
v.
Surface water diversions (upslope):
100
vi.
Surface water diversions (downslope):
100
vii. Each well with exception of monitoring wells: 100
viii. Each property line: 150 2
ix. Top of slope of embankments or cuts of two feet or more in vertical height: 100
x. Each water line: 10
xi. Each swimming pool: 100
xii. Public right of way: 50
xiii. Nitrification field: 20
xiv. Each building foundation or basement: 100
' Habitable residences or places of assembly under separate ownership constructed after the
facilities herein were originally permitted or subsequently modified are exempt from this
setback.
2 Setbacks to property lines are not applicable when the Permittee, or the entity from which the
Permittee is leasing, owns both parcels separated by the property line.
3 Per a setback waiver recorded in the Wake County Register of Deeds, reduced setbacks from
the wetted area to any habitable residence or place of assembly under separate ownership are
as follows:
Parcels
Deed Book / Page
Setback
Easement
All parcels contained
in Buffaloe Preserve
16083 / 1710
200 feet
200 feet
[15A NCAC 02H .02190)(5)]
b. The storage and treatment units were originally permitted May 31, 1988. The setbacks for storage
and treatment units originally permitted or modified from October 1, 1987 to January 31, 1993 are
as follows (all distances in feet):
I. Each habitable residence or place of assembly under separate ownership: 400 1
ii. Each private or public water supply source: 100
iii. Each well with exception of monitoring wells: 100
iv. Each property line: 50 Z
v. Nitrification field: 20
' Habitable residences or places of assembly under separate ownership constructed after the
facilities herein were originally permitted or subsequently modified are exempt from this
setback.
2 Setbacks to property lines are not applicable when the Permittee, or the entity from which the
Permittee is leasing, owns both parcels separated by the property line.
[15A NCAC 02H .02190)(5)]
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III. OPERATION AND MAINTENANCE REQUIREMENTS
1. The Permittee shall operate and maintain the subject facilities as anon -discharge system. [15A NCAC
02T .0500]
2. The Permittee shall maintain an Operation and Maintenance Plan, which shall include operational
functions, maintenance schedules, safety measures, and a spill response plan. [15A NCAC 02T
.0507(a)]
3. Upon the Water Pollution Control System Operators Certification Commission's (WPCSOCC)
classification of the subject non -discharge facilities, the Permittee shall designate and employ a certified
operator in responsible charge (ORC), and one or more certified operators as back-up ORCs. The ORC
or their back-up shall operate and visit the facilities as required by the WPCSOCC. [15A NCAC 02T
.0117]
4. The Permittee shall maintain vegetative cover on the irrigation sites, such that crop health is optimal,
allows even effluent distribution, and allows inspection of the irrigation system. [15A NCAC 02T
.0507(b)]
5. The Permittee shall take measures to prevent effluent ponding in or runoff from the irrigation sites
listed in Attachment B. [15A NCAC 02T .0507(c)]
6. The Permittee shall not irrigate treated effluent during inclement weather, or when the soil is in a
condition that will cause ponding or runoff. [15A NCAC 02T .0505(x)]
7. Irrigation equipment shall be tested and calibrated once per permit cycle. [ 15A NCAC 02T .0507(d)]
8. Only treated effluent from the Wrenn Road WWTF shall be irrigated on the sites listed in Attachment
B. [15A NCAC 02T .0501]
9. The Permittee shall not allow vehicles or heavy machinery on the irrigation area, except during
equipment installation or maintenance activities. [15A NCAC 02T .0507(e)]
10. The Permittee shall prohibit public access to the wastewater treatment, storage, and irrigation facilities.
[15A NCAC 02T .0505(q)]
11. The Permittee shall dispose or utilize generated residuals in a Division -approved manner. [15A NCAC
02T .0508, 02T .I 100].
12. The Permittee shall not divert or bypass untreated or partially treated wastewater from the subject
facilities. [15A NCAC 02T .05050)]
13. Freeboard in the two 80 MG clay -lined gravity -thickening lagoons shall not be less than two feet at any
time. [15A NCAC 02T .0505(d)]
14. Gauges to monitor waste levels in the two 80 MG clay -lined gravity -thickening lagoons shall be
provided. These gauges shall have readily visible permanent markings, at inch or tenth of a foot
increments, indicating the following elevations: maximum liquid level at the top of the temporary liquid
storage volume; minimum liquid level at the bottom of the temporary liquid storage volume; and the
lowest point on top of the dam. [15A NCAC 02T .0507(f)]
15. A protective vegetative cover shall be established and maintained on all berms, pipe runs, erosion
control areas, surface water diversions, and earthen embankments (i.e., outside toe of embankment to
maximum allowable temporary storage elevation on the inside of the embankment). Trees, shrubs, and
other woody vegetation shall not be allowed to grow on the earthen dikes or embankments. Earthen
embankments shall be kept mowed or otherwise controlled and accessible. [15A NCAC 02T .0507(g)]
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16. Metering equipment shall be tested and calibrated annually. [15A NCAC 02T .0507(d)]
IV. MONITORING AND REPORTING REQUIREMENTS
The Permittee shall conduct and report any Division required monitoring necessary to evaluate this
facility's impact on groundwater and surface water. [15A NCAC 02T .0108(c)]
2. A Division -certified laboratory shall conduct all analyses for the required effluent, groundwater, and
surface water parameters. [15A NCAC 02H .0800]
3. Flow through the treatment facility shall be continuously monitored, and daily flow values shall be
reported on Form NDMR. Facilities with a permitted flow less than 10,000 GPD may estimate their
flow from water usage records provided the water source is metered. [15A NCAC 02T .0105(k), 02T
.0108(c)]
4. The Permittee shall monitor the treated effluent at the frequencies and locations for the parameters
specified in Attachment A. [15A NCAC 02T .0108(c)]
5. The Permittee shall maintain records tracking the amount of effluent irrigated. These records shall
include the following information for each irrigation site listed in Attachment B:
a. Date of irrigation;
b. Volume of effluent irrigated;
c. Site irrigated;
d. Length of time site is irrigated;
e. Continuous weekly, monthly, and year-to-date hydraulic (inches/acre) loadings;
f. Continuous monthly and year-to-date loadings for any non -hydraulic parameter specifically
limited in Attachment B;
g. Weather conditions; and
h. Maintenance of cover crops.
[15A NCAC 02T .0108(c)]
6. Freeboard (i.e., waste level to the lowest embankment elevation) in the two 80 MG clay -lined gravity -
thickening lagoons shall be measured to the nearest inch or tenth of a foot, and recorded weekly.
Weekly freeboard records shall be maintained for five years, and shall be made available to the Division
upon request. [15A NCAC 02T .0108(c)]
7. Three copies of all monitoring data (as specified in Conditions IV.3. and IVA.) on Form NDMR for
each PPI and three copies of all operation and disposal records (as specified in Conditions IV.S. and
IV.6.) on Form NDAR-1 for every site in Attachment B shall be submitted on or before the last day of
the following month. If no activities occurred during the monitoring month, monitoring reports are still
required documenting the absence of the activity. All information shall be submitted to the following
address:
Division of Water Resources
Information Processing Unit
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
[15A NCAC 02T .0105(l)]
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8. Pursuant to G.S. 143-215.1C(a), the Permittee shall provide to its users and the Division of Water
Resources an annual report summarizing the performance of the wastewater treatment and irrigation
facility and the extent to which the facility has violated this permit, or federal or State laws, regulations,
or rules related to the protection of water quality. This report shall be prepared on either a calendar or
fiscal year basis and shall be provided no later than 60 days after the end of the calendar or fiscal
year. Two copies of the annual report provided to the Permittee's users shall be submitted to:
Division of Water Resources
Water Quality Permitting Section
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
[G.S. 143-215.1C(a)]
9. The Permittee shall maintain a record of all residuals removed from this facility. This record shall be
maintained for five years, and shall be made available to the Division upon request. This record shall
include:
a. Name of the residuals hauler;
b. Non -Discharge permit number authorizing the residuals disposal, or a letter from a municipality
agreeing to accept the residuals;
c. Date the residuals were hauled; and
d. Volume of residuals removed.
[15A NCAC 02T .0508(b)]
10. A maintenance log shall be kept at this facility. This log shall be maintained for five years, and shall
be made available to the Division upon request. This log shall include:
a. Date of flow measurement device calibration;
b. Date of irrigation equipment calibration;
c. Visual observations of the plant and plant site; and
d. Record of preventative maintenance (e.g., changing of equipment, adjustments, testing, inspections
and cleanings, etc.).
[15A NCAC 02T .0507(h)]
11. Monitoring wells MW-3, MW-8, and MW-9 shall be sampled at the frequencies and for the parameters
specified in Attachment C. All mapping, well construction forms, well abandonment forms and
monitoring data shall refer to the permit number and the well nomenclature as provided in Attachment
C and Figure 1. [15A NCAC 02T .0105(m)]
12. Two copies of the monitoring well sampling and analysis results shall be submitted on a Compliance
Monitoring Form (GW-59), along with attached copies of laboratory analyses, on or before the last
working day of the month following the sampling month. The Compliance Monitoring Form (GW-59)
shall include this permit number, the appropriate well identification number, and one GW-59a
certification form shall be submitted with each set of sampling results. All information shall be
submitted to the following address:
Division of Water Resources
Information Processing Unit
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
[15A NCAC 02T .0105(m)]
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13. An annual representative soils analysis (i.e., Standard Soil Fertility Analysis) shall be conducted on
each irrigation site listed in Attachment B. These results shall be maintained at the facility for five
years, and shall be made available to the Division upon request. Each Standard Soil Fertility Analysis
shall include the following parameters:
Acidity
Exchangeable Sodium Percentage
Phosphorus
Base Saturation (by calculation)
Magnesium
Potassium
Calcium
Manganese
Sodium
Cation Exchange Capacity
Percent Humic Matter
Zinc
Copper
pH
[15A NCAC 02T .0108(c)]
14. Noncompliance Notification:
The Permittee shall report to the Raleigh Regional Office, telephone number [phone], within
24 hours of first knowledge of the following:
a. Treatment of wastes abnormal in quantity or characteristic, including the known passage of a
hazardous substance.
b. Any process unit failure (e.g., mechanical, electrical, etc.) rendering the facility incapable of
adequate wastewater treatment.
c. Any facility failure resulting in a discharge to surface waters.
d. Any time self -monitoring indicates the facility has gone out of compliance with its permit
limitations.
e. Ponding in or runoff from the irrigation sites.
Emergencies requiring reporting outside normal business hours shall call the Division's Emergency
Response personnel at telephone number [phone], [phone], or [phone]. All
noncompliance notifications shall file a written report to the Raleigh Regional Office within five days
of first knowledge of the occurrence, and this report shall outline the actions proposed or taken to ensure
the problem does not recur. [15A NCAC 02T .0108(b)(1)(A)]
V. INSPECTIONS
1. The Permittee shall perform inspections and maintenance to ensure proper operation of the wastewater
treatment and irrigation facilities. [15A NCAC 02T .0507(i)]
2. The Permittee shall inspect the wastewater treatment and irrigation facilities to prevent malfunctions,
facility deterioration, and operator errors that may result in discharges of wastes to the environment,
threats to human health, or public nuisances. The Permittee shall maintain an inspection log that
includes the date and time of inspection, observations made, and maintenance, repairs, or corrective
actions taken. The Permittee shall maintain this inspection log for a period of five years from the date
of the inspection, and this log shall be made available to the Division upon request. [15A NCAC 02T
.0507(h), 02T .0507(i)]
3. Division authorized representatives may, upon presentation of credentials, enter and inspect any
property, premises, or place related to the wastewater treatment and irrigation facilities permitted herein
at any reasonable time for determining compliance with this permit. Division authorized
representatives may inspect or copy records maintained under the terms and conditions of this permit,
and may collect groundwater, surface water, or leachate samples. [G.S. 143-215.3(a)(2)]
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VI. GENERAL CONDITIONS
1. Failure to comply with the conditions and limitations contained herein may subject the Permittee to a
Division enforcement action. [G.S. 143-215.6A, 143-215.613, 143-215.6C]
2. This permit is effective only with respect to the nature and volume of wastes described in the permit
application, and Division -approved plans and specifications. [G.S. 143-215.1(d)]
3. Unless specifically requested and approved in this permit, there are no variances to administrative codes
or general statutes governing the construction or operation of the facilities permitted herein. [15A
NCAC 02T .0105(n)]
4. The issuance of this permit does not exempt the Permittee from complying with all statutes, rules,
regulations, or ordinances that other jurisdictional government agencies (e.g., local, state, and federal)
may require. [15A NCAC 02T .0105(c)(6)]
5. If the permitted facilities change ownership, or the Permittee changes their name, the Permittee shall
submit a permit modification request on Division -approved forms. The Permittee shall comply with
all terms and conditions of this permit until the permit is transferred to the successor -owner. [G.S. 143-
215.1(d3)]
6. The Permittee shall retain a set of Division -approved plans and specifications for the life of the facilities
permitted herein. [15A NCAC 02T .0105(o)]
7. The Permittee shall maintain this permit until the proper closure of all facilities permitted herein, or
until the facilities permitted herein are permitted by another authority. [15A NCAC 02T .01050)]
8. This permit is subject to revocation or modification upon 60-day notice from the Division Director, in
whole or part for:
a. violation of any terms or conditions of this permit or Administrative Code Title 15A Subchapter
02T;
b. obtaining a permit by misrepresentation or failure to disclose all relevant facts;
c. the Permittee's refusal to allow authorized Department employees upon presentation of credentials:
I. to enter the Permittee's premises where a system is located or where any records are required
to be kept;
ii. to have access to any permit required documents and records;
iii. to inspect any monitoring equipment or method as required in this permit; or
iv. to sample any pollutants;
d. the Permittee's failure to pay the annual fee for administering and compliance monitoring; or
e. a Division determination that the conditions of this permit are in conflict with North Carolina
Administrative Code or General Statutes.
[15A NCAC 02T .0110]
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9. Unless the Division Director grants a variance, expansion of the facilities permitted herein shall not
occur if any of the following apply:
a. The Permittee or any parent, subsidiary, or other affiliate of the Permittee has been convicted of
environmental crimes under G.S. 143-215.6B, or under Federal law that would otherwise be
prosecuted under G.S. 143-215.6B, and all appeals of this conviction have been abandoned or
exhausted.
b. The Permittee or any parent, subsidiary, or other affiliate of the Permittee has previously abandoned
a wastewater treatment facility without properly closing the facility.
c. The Permittee or any parent, subsidiary, or other affiliate of the Permittee has not paid a civil
penalty, and all appeals of this penalty have been abandoned or exhausted.
d. The Permittee or any parent, subsidiary, or other affiliate of the Permittee is currently not compliant
with any compliance schedule in a permit, settlement agreement, or order.
e. The Permittee or any parent, subsidiary, or other affiliate of the Permittee has not paid an annual
fee.
[15A NCAC 02T .0120(b), 02T .0120(d)]
10. This permit shall not be renewed if the Permittee or any affiliation has not paid the required annual fee.
[15A NCAC 02T .0120(c)]
Permit issued this the 4rh day of May 2020
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
7L4a,�7z
S. Daniel Smith, Director
Division of Water Resources
By Authority of the Environmental Management Commission
Permit Number WQ0002708
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ATTACHMENT A — LIMITATIONS AND MONITORING REQUIREMENTS Permit Number: WQ0002708 Version: 4.0
PPI 001— WWTF Effluent
EFFLUENT CHARACTERISTICS 3
EFFLUENT LIMITS
MONITORING REQUIREMENTS 2
PCS
Code
Parameter Description
Units of
Measure
Monthly Monthly
Average Geometric Mean Daily Minimum Daily Maximum
Measurement
Frequency
Sample
Type
01002
Arsenic, Total (as As)
µg/L
Monthly
Grab
00310
BOD, 5-Day (20 °C)
mg/L
Monthly
Grab
00916
Calcium, Total (as Ca)
mg/L
Monthly
Grab
00940
Chloride (as Cl)
mg/L
3 x Year'
Grab
50060
Chlorine, Total Residual
mg/L
Weekly
Grab
31616
Coliform, Fecal MF, M-FC Broth, 44.5 °C
#/100 mL
Monthly
Grab
50050
Flow, in Conduit or thru Treatment Plant
GPD
704,618
Continuous
Recorder
01045
Iron, Total (as Fe)
µg/L
Monthly
Grab
00927
Magnesium, Total (as Mg)
mg/L
Monthly
Grab
01055
Manganese, Total (as Mn)
µg/L
Monthly
Grab
00600
Nitrogen, Total (as N)
mg/L
Monthly
Grab
00400
pH
su
Weekly
Grab
00665
Phosphorus, Total (as P)
mg/L
Monthly
Grab
00931
Sodium Adsorption Ratio
ratio
Monthly
Calculated
00929
Sodium, Total (as Na)
mg/L
Monthly
Grab
70300
Solids, Total Dissolved — 180 °C
mg/L
3 x Year'
Grab
00530
Solids, Total Suspended
mg/L
Monthly
Grab
00945
Sulfate, Total (as SOa)
mg/L
Monthly
Grab
1. 3 x Year monitoring shall be conducted in March, July, and November.
2. This facility is not subject to the monitoring requirements listed in the Non -Discharge Effluent Monitoring Policy because the wastewater source for this facility is not domestic.
3. Total Ammonia Nitrogen, Total Kjeldahl Nitrogen, and Total Nitrate Nitrogen have been excluded in the required effluent monitoring and replaced with Total Nitrogen because the facility has
shown these constituents are present in only very small concentrations.
WQ0002708 Version 4.0 Attachment A Page I of I

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ATTACHMENT B - APPROVED LAND APPLICATION SITES AND LIMITATIONS
City of Raleigh - Wrenn Road WWTF
Permit Number: WQ0002708 Version: 4.0
IRRIGATION AREA INFORMATION
APPLICATION LIMITATIONS
Field
Owner
County
Latitude
Longitude
Net
Acreage
Dominant
Soil Series
Parameter
Hourly
Rate
Yearly
Max
Units
IA
City of Raleigh
Wake
35.635815'
-78.587499'
19.60
Fuquay/Dothan
01284 - Non -Discharge Application Rate
0.11
26.0
inches
1B
City of Raleigh
Wake
35.636626'
-78.590417'
16.18
Fuquay/Dothan
01284 - Non -Discharge Application Rate
0.13
26.9
inches
2A
City of Raleigh
Wake
35.632354'
-78.585632'
20.24
Appling/Wedowee/
Cecil
01284 - Non -Discharge Application Rate
0.15
36.7
inches
2B
City of Raleigh
Wake
35.633313'
-78.587917'
20.15
Appling/Wedowee/
Cecil
01284 - Non -Discharge Application Rate
0.13
28.9
inches
3A
City of Raleigh
Wake
35.636286'
-78.580364'
23.38
Appling/Wedowee/
Cecil
01284 - Non -Discharge Application Rate
0.16
42.3
inches
3B
City of Raleigh
Wake
35.632772'
-78.582274'
16.71
Appling/Wedowee/
Cecil
01284 - Non -Discharge Application Rate
0.17
44.1
inches
4A
City of Raleigh
Wake
35.642765'
-78.577725'
21.87
Helena/Vance
01284 - Non -Discharge Application Rate
0.16
41.4
inches
4B
City of Raleigh
Wake
35.642486'
-78.579764'
15.40
Helena/Vance
01284 - Non -Discharge Application Rate
0.18
40.9
inches
5A
City of Raleigh
Wake
35.648659'
-78.577983'
20.05
Fuquay/Dothan
01284 - Non -Discharge Application Rate
0.15
29.0
inches
5B
City of Raleigh
Wake
35.646287'
-78.577897'
20.47
Appling/Wedowee/
Cecil
01284 - Non -Discharge Application Rate
0.18
39.0
inches
6A
City of Raleigh
Wake
35.646339'
-78.580085'
19.18
Helena/Vance
01284 - Non -Discharge Application Rate
0.18
41.3
inches
6B
City of Raleigh
Wake
35.648205'
-78.579678'
18.25
Helena/Vance
01284 - Non -Discharge Application Rate
0.18
39.7
inches
7A
City of Raleigh
Wake
35.641283'
-78.587145'
18.69
Appling/Wedowee/
Cecil
01284 - Non -Discharge Application Rate
0.16
41.7
inches
7B
City of Raleigh
Wake
35.644125'
-78.583004'
18.51
Appling/Wedowee/
Cecil
01284 - Non -Discharge Application Rate
0.18
43.9
inches
Totals
268.68
1. Irrigation shall not occur in areas identified with shallow groundwater and/or low-lying areas prone to runoff during the months of November, December, January, and February.
WQ0002708 Version 4.0 Attachment B Page I of I

THIS PAGE BLANK

ATTACHMENT C — GROUNDWATER MONITORING AND LIMITATIONS
Monitoring Wells: MW-3, MW-8, and MW-9
Permit Number: WQ0002708 Version: 4.0
GROUNDWATER CHARACTERISTICS
GROUNDWATER STANDARDS
MONITORING REQUIREMENTS
PCS Code
Parameter Description
Daily Maximum
Frequency Measurement
Sample Type
Footnotes
38576
Acrylamide in Water, Total
0.008
µg/L
3 x Year
Grab
1
01002
Arsenic, Total (as As)
0.01
mg/L
3 x Year
Grab
1,8
00680
Carbon, Tot Organic (TOC)
mg/L
3 x Year
Grab
1,6
00940
Chloride (as Cl)
250
mg/L
3 x Year
Grab
1
31616
Coliform, Fecal MF, M-FC Broth, 44.5 °C
#/100 mL
3 x Year
Grab
1
01045
Iron, Total (as Fe)
0.3
mg/L
3 x Year
Grab
1,8
01055
Manganese, Total (as Mn)
0.05
mg/L
3 x Year
Grab
1,8
00620
Nitrogen, Nitrate Total (as N)
10
mg/L
3 x Year
Grab
1
00400
pH
6.5-8.5
su
3 x Year
Grab
1,2
00665
Phosphorus, Total (as P)
mg/L
3 x Year
Grab
1
70300
Solids, Total Dissolved - 180 °C
500
mg/L
3 x Year
Grab
1
00945
Sulfate, Total (as SOa)
250
mg/L
3 x Year
Grab
1
GWVOC
Volatile Compounds (GW)
Present: Yes/No
Annually
Grab
1, 4, 5
82546
Water Level, Distance from measuring point
feet
3 x Year
Calculated
1, 2, 3
1. 3 x Year monitoring shall be conducted in March, July, and November; Annual monitoring shall be conducted in November.
2. The measurement of water levels shall be made prior to purging the wells. The depth to water in each well shall be measured from the surveyed point on the top of the casing. The measurement of
pH shall be made after purging and prior to sampling for the remaining parameters.
3. The measuring points (top of well casing) of all monitoring wells shall be surveyed to provide the relative elevation of the measuring point for each monitoring well. The measuring points (top of
casing) of all monitoring wells shall be surveyed relative to a common datum.
WQ0002708 Version 4.0 Attachment C Page I of 2

4. Volatile Organic Compounds (VOC) - In November only, analyze by one of the following methods:
a. Standard Method 6230D, PQL at 0.5 gg/L or less
b. Standard Method 6210D, PQL at 0.5 gg/L or less
c. EPA Method 8021, Low Concentration, PQL at 0.5 gg/L or less
d. EPA Method 8260, Low Concentration, PQL at 0.5 gg/L or less
e. Another method with prior approval by the Water Quality Permitting Section Chief
Any method used shall meet the following qualifications:
a. A laboratory shall be DWR certified to run any method used.
b. The method used shall include all the constituents listed in Table VIII of Standard Method 6230D.
c. The method used shall provide a PQL of 0.5 gg/L or less that shall be supported by laboratory proficiency studies as required by the DWR Laboratory Certification Unit. Any constituents
detected above the MDL but below the PQL of 0.5 gg/L shall be qualified (estimated) and reported.
5. If any volatile organic compounds (VOC) are detected as a result of monitoring as provided in Attachment C, then the Raleigh Regional Office supervisor, telephone number [phone], shall
be contacted immediately for further instructions regarding any additional follow-up analyses required.
6. If TOC concentrations greater than 10 mg/L are detected in any downgradient monitoring well, additional sampling and analysis shall be conducted to identify the individual constituents comprising
this TOC concentration. If the TOC concentration as measured in the background monitor well exceeds 10 mg/L, this concentration will be taken to represent the naturally occurring TOC
concentration. Any exceedances of this naturally occurring TOC concentration in the downgradient wells shall be subject to the additional sampling and analysis as described above.
7. Monitoring wells shall be reported consistent with the nomenclature and location information provided in Figure 1 and this attachment.
8. Monitoring data suggests that the naturally occurring background concentrations for arsenic, iron, and manganese may exceed the groundwater quality standards. Per 15A NCAC 02L .0202(b)(3),
the Permiee has applied to the Director to establish background concentrations and site -specific water quality standards for these parameters. A groundwater monitoring plan for arsenic, iron,
and manganese was approved by the Division on April 30, 2019. The Division shall use enforcement discretion for any apparent groundwater standard violation for arsenic, iron, or manganese
until background concentrations and site -specific groundwater quality standards can be determined.
WQ0002708 Version 4.0 Attachment C Page 2 of 2

SPLITTER BOX 10
LAGOON
NO. 1
F)""Z
/ FROM
D.E. BENTON WTP
4 RESIDUALS STOF
LAGOON
NO. 2
' IRRIGATION
PUMP
STATION
0
TO SPRAY FIELDS
CHLORINE
CONTACT
CHAMBER
Process Flow Diagram
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City of Raleigh
Wrenn Road
Spray Irrigation
System Modifications
VIEW
OM13-101490-01B