NC0036269_Permit Issuance_20131108

AwA
NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Resources
Water Quality Programs
Pat McCrory Thomas A. Reeder John E. Skvarla, III
Governor Director Secretary
November 8, 2013
Mr. T. Mark Fowler, Director
Water and Sewer Authority of Cabarrus County
P.O. Box 428
Concord, North Carolina 28026-0428
Subject: NPDES Final Permit
Permit NC0036269
Rocky River Regional WWTP
Cabarrus County
Class IV Facility
Dear Mr. Fowler:
Division personnel have reviewed and approved your application for renewal of the
subject permit. Accordingly, we are forwarding the attached 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 U.S. Environmental Protection
Agency dated October 15, 2007 (or as subsequently amended).
' The Division reviewed your comments on the draft permit. Your comments are
summarized below followed by the Division's response:
• Revise the flow trigger for the effluent monitoring requirements to go from 24 MGD to
26.5 MGD to reflect language in 15A NCAC 02H .0223 (from 90% of permitted flow on
a maximum monthly basis to 90% of permitted flow on annual average flow basis) —
The 90% rule in 15A NCAC 02H .0223 is designed to insure that WWTPs don't exceed the
hydraulic treatment capacity of the treatment system. Based on this rule the permittee must
initiate permitting when flow reaches 90% of average annual flow to allow for enough time
to obtain the necessary permits and complete construction of new facilities. Your permit was
modified in 2010 to allow for the higher flow tier. An Authorization to Construct was
approved in 2011 and an Engineering Certification received for the modification of the
WWTP to handle the interim flow of 26.5 MGD, therefore the trigger was established as
90% of the permitted flow on a monthly average basis.
1617 Mail Service Center, Raleigh, North Carolina 27699-1617
Location: 512 N. Salisbury St. Raleigh, North Carolina 27604
Phone: [phone] FAX: [phone]
Internet: www.ncwaterquality.orq
NorthCarolina
!aturallij
An Equal Opportunity 1 Affirmative Action Employer

Water and Sewer Authority of Cabarrus County
November 8, 2013
Page 2 of 4
• Reduce monitoring frequency for CBOD, TSS, NH3N, and fecal coliform (24 MGD) -
The Division performed an evaluation of your request according to the 2010 Guidance
Regarding the Reduction of Monitoring Frequencies in NPDES Permits for Exceptionally
Performing Facilities. The three year data period used for the evaluation was April 2010 to
April 2013 which corresponded to the same data period used for your RPA and permit
renewal. All the parameters except TSS meet the criteria for monitoring reduction. The three
year arithmetic mean of effluent data for TSS is higher than fifty percent of the monthly
average permit limit. Monitoring frequencies for CBOD, NH3N and fecal coliform were
reduced to 2/week.
• Change sample type for mercury from composite to grab - The Division agrees that the
sample type was incorrect and the change is reflected in the final permit.
• Modify monitoring frequency for Total Mercury and Selenium to quarterly for two
years, then annually for the remainder of the permit term — Quarterly sampling will
remain in the permit. After collecting 2 years of data you can request that the Division
modifies the permit to reduce monitoring based on the results of the collected data.
• Reduce monitoring frequency for CBOD, TSS, NH3N, and fecal coliform (26.5 MGD &
34 MGD) — The Division can't grant this request until the facility has been operating and
collecting data for three years at the higher flow tiers.
• Modify instream monitoring frequency to correspond with the monitoring frequencies
specified in the YPDRBA Memorandum of Agreement with the DWR —The frequencies
specified in the permit for instream monitoring follow monitoring frequencies established in
15A NCAC 2B .0508. The frequencies established in the agreement are less stringent than
the permit so that the collaborative monitoring efforts are more efficient and effective. By
participating in the YPDRBA the permittee is exempted from the instream monitoring
requirements in the permits (See A.(1.) note 6 on your permit).
• Revise note 7 in in Condition A.(2) to reduce record retention period specified in 7(a)
and delete 7(c) — The requirements included in note 7 were developed at the time of the
WWTP re -rate to ensure that the pump stations are adequately sized to handle the higher
flow. This condition was agreed upon with WSACC at the time the permit was modified. As
the facility is still operating at the lower flow tier of 24 MGD and the system has not been
tested for the higher flows note 7 will remain in the permit as previously written.
• Delete last paragraph in Chronic Toxicity test condition that states "If the Permittee
monitors any pollutant more frequently than required by this permit, the results of such
monitoring shall be included in the calculation & reporting of the data submitted on the
DMR & all AT Form submitted." — This language comes from requirements in 40 CFR 122
and is included in the whole effluent toxicity special condition as it applies to data collected
for the WET tests as well as data collected for the DMRs. The whole effluent toxicity special
conditions are standard for every permit therefore the Division will not modify the language
in the permit at this time.
• Delay development of Mercury Minimization Plan (MMP) — The Division can't delay the
implementation of the MMP. As part of the implementation strategy of the Statewide
Mercury TMDL the Division implemented a permitting guidance approved by the
Environmental Management Commission and the EPA establishing criteria to develop a

Water and Sewer Authority of Cabanas County
November 8, 2013
Page 3 of 4
MMP. Your facility meets the criteria of discharging greater than 2 MGD and has detected
mercury in the effluent above 1 ng/1.
• Review reasonable potential analysis for copper and nickel — The Division found a
transcription error in the data used for the RPA for copper and nickel and reviewed the
calculations with the correct values. The high values for nickel (33 ug/1) and copper (43 ug/1)
were corrected to 4 ug/1 for copper and 3 ug/1 for nickel. The results of the RPA did not
change after the revision was made therefore no changes are necessary in the permit for these
parameters.
In addition to the modifications to the permit in response to your comments the permit includes a
special condition describing new requirements for electronic reporting. Proposed federal
regulations require electronic submittal of all discharge monitoring reports (DMRs) and specify
that, if a state does not establish a system to receive such submittals, then permittees must submit
DMRs electronically to the Environmental Protection Agency (EPA). The Division anticipates
that these regulations will be adopted and is beginning implementation.
The requirement to begin reporting discharge monitoring data electronically using the NC
DWR's Electronic Discharge Monitoring Report (eDMR) interne application has been added to
your final NPDES permit. [See Special Condition A. (8.)] For information on eDMR,
registering for eDMR and obtaining an eDMR user account, please visit the following web page:
http://portal.ncdenr.org/web/wq/admin/bog/ipu/edmr.
For information on EPA's proposed NPDES Electronic Reporting Rule, please visit the
following web site:
http://www2.epa. gov/compliance/proposed-npdes-electronic-reporting-rule.
If any parts, measurement frequencies or sampling requirements contained in this permit
are unacceptable to you, you have the right to an adjudicatory hearing upon written request
within thirty (30) days following receipt of this letter. This request must be in the form of a
written petition, conforming to Chapter 150B of the North Carolina General Statutes, and filed
with the Office of Administrative Hearings (6714 Mail Service Center, Raleigh, North Carolina
27699-6714). Unless such demand is made, this decision shall be final and binding.
Please note that this permit is not transferable except after notice to the Division. The
Division may require modification or revocation and reissuance of the permit. This permit does
not affect the legal requirements to obtain other permits which may be required by the Division
of Water Resources or permits required by the Division of Land Resources, .the Coastal Area
Management Act or any other federal or local governmental permits that may be required.

Water and Sewer Authority of Cabarrus County
November 8, 2013
Page 4 of 4
If you have any questions concerning this permit, please contact Teresa Rodriguez at
telephone number [phone] or at email [e-mail].
Sincerely,
homas A. Reeder
cc: NPDES Files
Central Files
EPA Region 4 (e-copy)
Mooresville Regional Office / Surface Water Protection Section
Aquatic Toxicology Unit (e-copy)
ESS Ecosystem Unit (e-copy)

Permit NC0036269
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER RESOURCES
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM (NPDES)
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,
Water and Sewer Authority of Cabarrus County
is hereby authorized to discharge wastewater from an outfall located at
Rocky River Regional Wastewater Treatment Plant
6400 Breezy Lane
Concord, NC
Cabarrus County
into receiving waters designated as the Rocky River located within the Yadkin - Pee Dee River Basin,
in accordance with effluent limitations, monitoring requirements, and other conditions set forth in
Parts I, II, III and IV hereof.
This permit shall become effective December 1, 2013.
This permit and authorization to discharge shall expire at midnight October 31, 2018.
Signed this day November 8, 2013.
mas A. Reeder, Director
Division of Water Resources
By Authority of the Environmental Management Commission
Page 1 of 14

•
Permit NC0036269f
SUPPLEMENT TO PERMIT COVER SHEET
All previous NPDES Permits issued to this facility, whether for operation or discharge are hereby
revoked. As of this permit issuance, any previously issued permit bearing this number is no longer
effective. Therefore, the exclusive authority to operate and discharge from this facility arises under
the permit conditions, requirements, terms, and provisions included herein.
The Water and Sewer Authority of Cabarrus County
is hereby authorized to:
1. to continue operating a 24 MGD wastewater treatment facility consisting of:
• influent bar screens;
• influent pump station;
• four (4) primary clarifiers;
• grit removal system;
• first stage aeration (pure oxygen);
• four (4) intermediate clarifiers;
• second stage aeration (pure oxygen);
• four (4) final clarifiers;
• chlorine disinfection (sodium hypochlorite);
• pure oxygen generator;
• sludge disposal by pumping to two gravity -flow sludge thickeners;
• sludge conditioning (polymer addition);
• two (2) Centrifuges;
• sludge incinerator;
• two (2) sludge -ash settling basins;
• alkalinity addition;
• imported Bisolids Handling Facility
• odor control system;
• RAS automative flow controls;
• plant automation control system;
• one (1) standby power generator;
located at the Rocky River Regional Wastewater Treatment Plant, 6400 Breezy Lane,
Concord, Cabarrus County; and
2. After receiving an Authorization to Construct from the Division, construct and operate
additional facilities needed to expand the facility to 34 MGD; and
3. Discharge from said treatment system via Outfall 001 (see attached map) into the Rocky
River, a stream classified as C waters within the Yadkin -Pee Dee River Basin.
Page 2of14

Permit NC0036269
Part I
A. (1) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS [24.0 MGD]
During the period beginning on the effective day of this permit and lasting until flow reaches 90% of permitted
flow (i.e., 21.6 MGD on a maximum monthly average basis), or permit expiration, the Perrnittee is authorized to
discharge from Outfall 001. Such discharges shall be limited and monitored by the Per7nittee as specified
below:
PARAMETER -
LIMITS
MONITORING REQUIREMENTS
Monthly
Average
Weekly
,, _Average
' Daily
•_ Average
Measurement
,. Frequency
Sample
Type
Sample
Location?'
Flow
24.0 MGD
Continuous
Recording
Influent or
Effluent
CBOD, 5 day, 20°C Summer
(April 1 - October 31)3
17.0 mg/L
25.5 mg/L
2/Week
Composite
Influent &
Effluent
CBOD, 5 day, 20°C Winter
(November 1 - March 31) 3
25.0 mg/L
37.5 mg/L
2/Week
Composite
Influent &
Effluent
Total Suspended Solids (TSS) 3
30.0 mg/L
45.0 mg/L
Daily
Composite
Influent &
Effluent
NH3 as N Summer
(April 1— October 31)
4.0 mg/L
12.0 mglL
2/Week
Composite
Effluent
NH3 as N Winter
(November 1 - March 31)
10.0 mg/L
30.0 mg/L
2/Week
Composite
Effluent
Dissolved Oxygen
Daily average > 6.0 mg/L
Daily
Grab
Effluent
Total Residual Chlorine4
28 pg/L
Daily
Grab
Effluent
Fecal Coliform
(geometric mean)
200 / 100 mL
400 / 100 mL
2/ Week
Grab
Effluent
Total Nitrogen
(NO2 + NO3 + TKN)
Monthly
Composite
Effluent
Total Phosphorus
Monthly
Composite
Effluent
Chronic Toxicity5
Quarterly
Composite
Effluent
Temperature, °C
Daily
Grab
Effluent
pH
> 6.0 and < 9.0 standard units
Daily
Grab
Effluent
Total Copper
Quarterly
Composite
Effluent
Total Zinc
Quarterly
Composite
Effluent
Total Mercury
Quarterly
Grab
Effluent
Total Selenium
Quarterly
Composite
Effluent
Temperature, °C6
Variable 7
Grab
U, D
Conductivity6
Variable 7
Grab
U, D
Dissolved Oxygen6
Variable 7
Grab
U, D
Fecal Coliform
(geometric mean) 6
Variable 7
Grab
U, D
Table Footnotes:
1. No later than 90 days from the effective date of this permit, begin submitting discharge monitoring reports
electronically using NC DWR's eDMR application system. See Special Condition A (9).
2. U: Upstream at NCSR 1132; Di: Downstream at U.S. Highway 601; D2: Downstream at NCSR 1006.
3. Monthly average effluent values for Carbonaceous Biochemical Oxygen Demand (CBOD5) and TSS shall not exceed
15% of the respective influent values (i.e. 85% removal).
4. Total Residual Chlorine (TRC). The facility shall report all effluent TRC values reported by a NC certified laboratory
including field certified. However, effluent values below 50 ug/L will be treated as zero for compliance purposes.
5. Chronic Toxicity (Ceriodaphnia) at 59.6%: sample quarterly during February, May, August, and November [see A. (4)].
Page 3 of 14

Permit NC0036269
6. Monitoring upstream (U) and downstream (Dr and D2) are provisionally waived, based on membership in the Yadkin —
Pee Dee River Basin Association. If at any time during the term of this permit, membership is terminated, the Permittee
shall notify the Division immediately, and immediately conduct instream monitoring as stipulated in this permit.
7. Variable Frequency — The Permittee shall collect instream samples three times per week (3/week) during the months of
June, July, August, and September; and once per week (1/ week) during April, May, and October only.
Effluent shall contain no floating solids or foam visible in other than trace amounts.
Page 4 of 14

Permit NC0036269
A. (2) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS [26.5 MGD]
During the period beginning with flow > 21.6 MGD on a maximum monthly average basis and lasting until
permit expiration or expansion to 34 MGD, the Permittee is authorized to discharge from Outfall 001. Such
discharges shall be limited and monitored by the Permittee as specified below:
PARAMETER - '
_ - LIMITS
MONITORING; REQUIREMENTS
Monthly
'Average ; '
-Weekly
Average
" Daily
Average '
Measurement
' Frequency
Sample
Type
' Sample
Locatiodl.
Flow
26.5 MGD
•
Continuous
Recording
Influent or
Effluent
CBOD, 5 day, 20°C Summer
(April 1 - October 31)2
15,4 mg/L
23.1 mg/L
Daily
Composite
Influent &
Effluent
CBOD, 5 day, 20°C Winter
(November 1 - March 31) 2
22.6 rrig/L
33.9 mg/L
Daily
Composite
Influent &
Effluent
Total Suspended Solids (TSS) 2
30.0 mg/L
45.0 mg/L
Daily
Composite
Influent &
Effluent
NH3 as N Summer
(April 1— October 31)
3.6 mg/L
10.8 mg/L
Daily
Composite
Effldent
NH3 as N Winter
(November 1 - March 31)
9.0 mg/L
27.0 mg/L
Daily
Composite
Effluent
Dissolved Oxygen
Daily average > 6.0 mg/L
Daily
Grab
Effluent
Total Residual Chlorine3
_
27 pg/L
Daily
Grab
Effluent
Fecal Coliform
(geometric mean)
200 / 100 mL
400 / 100 mL
Daily
Grab
Effluent
Total Nitrogen
(NO2 + NO3 + TKN)
Monthly
Composite
Effluent
Total Phosphorus
Monthly
Composite
Effluent
Chronic Toxicity4
Quarterly
Composite
Effluent
Temperature, °C
Daily
Grab
Effluent
pH
> 6.0 and < 9.0 standard units
Daily
Grab
Effluent
Total Copper
Quarterly
Composite
Effluent
Total Zinc
•
Quarterly
Composite
Effluent
Total Mercury
Quarterly
Grab
Effluent
Total Selenium
- Quarterly
Composite
Effluent
Temperature, °C5
Variable 6
Grab
U, D
Conductivity5
Variable 6
Grab
U, D
Dissolved Oxygen5
Variable 6
Grab
U, D
Fecal Coliform
(geometric mean) 5
Variable 6
Grab
U, D
Influent Pump Station Flow7
Footnote 7
Footnote 7
Influent
Table Footnotes:
1. U: Upstream at NCSR 1132; D1: Downstream at U.S. Highway 601; D2: Downstream at NCSR 1006.
2. Monthly average effluent values for Carbonaceous Biochemical Oxygen Demand (CBOD5) and TSS shall not exceed
15% of the respective influent values (i.e. 85% removal).
3. Total Residual Chlorine (TRC). The facility shall report all effluent TRC values reported by a NC certified laboratory
including field certified. However, effluent values below 50 ug/L will be treated as zero for compliance purposes
4. Chronic Toxicity (Ceriodaphnia) at 62.0%: sample quarterly during February, May, August, and November [see A. (4)].
5. Monitoring upstream (U) and downstream (D1 and D2) are provisionally waived, based on membership in the Yadkin —
Pee Dee River Basin Association. If at any time during the term of this permit, membership is terminated, the Permittee
shall notify the Division immediately, and immediately conduct instream monitoring as stipulated in this permit.
Page 5 of 14

Permit NC0036269
• 6. Variable Frequency — The Permittee shall collect instream samples three times per week (3/week) during the summer
months of June, July, August, and September; and once per week (1/ week) during the months of April, May, and
October only.
7. Additional Influent Pump Station/Flow Monitoring Requirements specific to 26.5 MGD Rerate Effluent Sheet:
a. Flow monitoring for the two influent pump stations (Lower Rocky River and Main) including peak hourly
flow, and daily flow. Monitoring shall also include pump run times, both for individual pumps and pumps
running in combination, in order to establish the number of pumps required to run for peak flow events.
Records shall be maintained for 10 years and made available to the Division upon request.
b. Annual reporting for each influent pump station outlining all wet weather events where all pumps were
required to run to handle peak flows. This annual report shall be submitted to the Mooresville Regional
Office along with rainfall amounts specific to the wet weather flow event. This report does not supersede any
other reporting requirements. The report shall also indicate whether any reportable overflows occurred at
either pump station.
c. Flow monitoring of individual jurisdictional bulk customers (i.e., local government units) that are tributary to
the WSACC system. Records shall be maintained for 10 years and made available to the Division upon
request. Basins with the highest peak flows compared to average daily flow shall be discussed with the local
government unit and the WSACC Board with respect to targeted sewer rehabilitation in those specific
individual drainage basins.
Effluent shall contain no floating solids or foam visible in other than trace amounts.
Page 6 of 14

Permit NC0036269
A. (3) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS [34.0 MGD]
During the period beginning with the receipt of an Engineer's Certification of Completion for expansion to 34
MGD, and lasting until permit expiration, the Permittee is authorized to discharge from Outfall 001. Such
discharges shall be limited and monitored by the Permittee as specified below:
PARAMETER
LIMITS
MONITORING REQUIREMENTS
" Monthly
Average
Weekly
Average •
, . Daily
' Average
Measurement
Frequency
Sample
Type
Sample
Locations
Flow
34.0 MGD
•
Continuous
Recording
Influent or
Effluent
CBOD, 5 day, 20°C Summer
(April 1 - October 31)2
10.0 mg/L
25.0 mg/L
Daily
Composite
Influent &
Effluent
CBOD, 5 day, 20°C Winter
(November 1 - March 31) 2
20.0 mg/L
35.0 mg/L
Daily
.
Composite
Influent &
Effluent
Total Suspended Solids (TSS) 2
30.0 mg/L
45.0 mg/L
Daily
Composite
Influent &
Effluent
NH3 as N Summer
(April 1— October 31)
2.0 mg/L
6.0 mg/L
Daily
Composite
Effluent
NH3 as N Winter
(November 1 - March 31)
4.0 mglL
12.0 mg/L
Daily -
Composite
Effluent
Dissolved Oxygen
Daily average > 6.0 mg/L
Daily
Grab
Effluent
Total Residual Chlorine3
25 pg/L
Daily
Grab
Effluent
Fecal Coliform
(geometric mean)
200 / 100 mL
400 / 100 mL
Daily
Grab
Effluent
Total Nitrogen
(NO2 + NO3 + TKN)
Monthly
Composite
Effluent
Total Phosphorus
•
Monthly
Composite
Effluent
Chronic Toxicity4
Quarterly
Composite
Effluent
Temperature, °C
Daily
Grab
Effluent
pH
> 6.0 and < 9.0 standard units
Daily
Grab
Effluent
Total Copper
Quarterly
Composite
Effluent
Total Zinc
Quarterly
Composite
Effluent
Total Mercury
Quarterly
Grab
Effluent
Total Selenium
Quarterly
Composite
Effluent
Temperature, °C5
Variable 6
Grab
U, D
Conductivity5
Variable 6
Grab
U, D
Dissolved Oxygen5
Variable 6
Grab
U, D
Fecal Coliform
(geometric mean) 5
Variable 6
Grab
U, D
Table Footnotes:
1. U: Upstream at NCSR 1132; Di: Downstream at U.S. Highway 601; D2: Downstream at NCSR 1006.
2. Monthly average effluent values for Carbonaceous Biochemical Oxygen Demand (CBOD5) and TSS shall not exceed
15% of the respective influent values (i.e. 85% removal).
3. Total Residual Chlorine (TRC). The facility shall report all effluent TRC values reported by a NC certified laboratory
including field certified. However, effluent values below 50 ug/L will be treated as zero for compliance purposes
4. Chronic Toxicity (Ceriodaphnia) at 67.7%: sample quarterly during February, May, August, and November [see A. (4)].
5. Monitoring upstream (U) and downstream (Di and D2) are provisionally waived, based on membership in the Yadkin —
Pee Dee River Basin Association. If at any time during the term of this permit, membership is terminated, the Permittee
shall notify the Division immediately, and immediately conduct instream monitoring as stipulated in this permit.
Page 7of14

Permit NC0036269
6. Variable Frequency — The Permittee shall collect instream samples three times per week (3/week) during the summer
months of June, July, August, and September; and once per week (1/ week) during the months of April, May, and
October only.
Effluent shall contain no floating solids or foam visible in other than trace amounts.
A. (4) CHRONIC TOXICITY PERMIT LIMIT (QUARTERLY)
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to
Ceriodaphnia dubia at an effluent concentration of 59.6% (24 MGD); 62% (26.5 MGD) and 67.7% (34
MGD).
The permit holder shall perform at a minimum, quarterly monitoring using test procedures outlined in the
"North Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure," Revised December 2010, or subsequent
versions or "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised- December
2010) or subsequent versions. The tests will be performed during the months of February, May, August and
November. These months signify the first month of each three month toxicity testing quarter assigned to the
facility. Effluent sampling for this testing must be obtained during representative effluent discharge and shall
be performed at the NPDES permitted final effluent discharge below all treatment processes.
If the test procedure performed as the first test of any single quarter results in a failure or ChV below the
permit limit, then multiple -concentration testing shall be performed at a minimum, in each of the two
following months as described in "North Carolina Phase II Chronic Whole Effluent Toxicity Test
Procedure" (Revised -December 2010) or subsequent versions.
All toxicity testing results required as part of this permit condition will be entered on the Effluent Discharge
Monitoring Form (MR-1) for the months in which tests were performed, using the parameter code TGP3B for
the pass/fail results and '1'HP3B for the Chronic Value. Additionally, Form AT-3 (original) is to be sent to the
following address:
Attention: North Carolina Division of Water Resources
Environmental Sciences Section
1621 Mail Service Center
Raleigh, North Carolina 27699-1621
Completed Aquatic Toxicity Test Forms shall be filed with the Environmental Sciences Section no later than 30
days after the end of the reporting period for which the report is made.
Test data shall be complete, accurate, include all supporting chemical/physical measurements and all
concentration/response data, and be certified by laboratory supervisor and ORC or approved designate signature.
Total residual chlorine of the effluent toxicity sample must be measured and reported if chlorine is employed for
disinfection of the waste stream.
Should there be no discharge of flow from the facility during a month in which toxicity monitoring is required,
the permittee will complete the information located at the top of the aquatic toxicity (AT) test form indicating
the facility name, permit number, pipe number, county, and the month/year of the report with the notation of
"No Flow" in the comment area of the form. The report shall be submitted to the Environmental Sciences
Section at the address cited above.
Should the permittee fail to monitor during a month in which toxicity monitoring is required, monitoring will be
required during the following month. Assessment of toxicity compliance is based on the toxicity testing quarter,
Page 8 of 14

Permit NC0036269
which is the three month time interval that begins on the first day of the month in which toxicity testing is
required by this permit and continues until the fmal day of the third month.
Should any test data from this monitoring requirement or tests performed by the North Carolina Division of
Water Resources indicate potential impacts to the receiving stream, this permit may be re -opened and modified
to include alternate monitoring requirements or limits.
If the Permittee monitors any pollutant more frequently than required by this permit, the results of such
monitoring shall be included in the calculation & reporting of the data submitted on the DMR & all AT Form
submitted.
NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control
organism survival, minimum control organism reproduction, and appropriate enviromnental controls, shall
constitute an invalid test and will require immediate follow-up testing to be completed no later than the last day
of the month following the month of the initial monitoring.
Page 9 of 14

•
Permit NC0036269
A. (5) EFFLUENT POLLUTANT SCAN
The Perrnittee shall perform a total of three (3) Effluent Pollutant Scans for all parameters listed below. One scan
must be performed in each of the following years: 2015, 2016, and 2017. Analytical methods shall be in
accordance with 40 CFR Part 136 and shall be sufficiently sensitive to determine whether parameters are present in
concentrations greater than applicable standards and criteria. Samples should be collected with one quarterly
toxicity test each year, and must represent seasonal variation [i.e., do not sample in the same quarter every year].
Unless otherwise indicated, metals shall be analyzed as "total recoverable."
Ammonia (as N)
Chlorine (total residual, TRC)
Dissolved oxygen
Nitrate/Nitrite
Kjeldahl nitrogen
Oil and grease
Phosphorus
Total dissolved solids
Hardness
Antimony
Arsenic
Beryllium
Cadmium
Chromium
Copper
Lead
Mercury (EPA Method 1631E)
Nickel
Selenium
Silver
Thallium
Zinc
Cyanide
Total phenolic compounds
Volatile organic compounds:
Acrolein
Acrylonitrile
Benzene
Bromoform
Carbon tetrachloride
Chlorobenzene
Chloro dibromometh ane
Chloroethane
2-chloroethylvinyl ether
Chloroform
Dichlorobromomethane
1,1-dichloroethane
1,2-dichloroethane
Trans-1,2-dichloroethylene
1,1-dichloroethylene
1,2-dichloropropane
1,3-dichloropropylene
Ethylbenzene
Methyl bromide
Methyl chloride
Methylene chloride
1,1,2,2-tetrachloroethane
Tetrachloroethylene
Toluene
1,1,1-trichloro ethane
1,1,2-trichloroethane
Trichloroethylene
Vinyl chloride
Acid -extractable compounds:
P-chloro-m-cresol
2-chlorophenol
2,4-dichlorophenol
2,4-dimethylphenol
4,6-dinitro-o-cresol
2,4-dinitrophenol
2-nitrophenol
4-nitrophenol
Pentachlorophenol
Phenol
2,4,6-trichlorophenol
Base -neutral compouuds:
Acenaphthene
Acenaphthylene
Anthracene
Benzidine
Benzo(a)anthracene
Benzo(a)pyrene
3,4 benzofluoranthene
Benzo(ghi)perylene
Benzo(k)fluoranthene
Bis (2-chloroethoxy) methane
Bis (2-chloroethyl) ether
Bis (2-chloroisopropyl) ether
Bis (2-ethylhexyl) phthalate
4-bromophenyl phenyl ether
Butyl benzyl phthalate
2-chloronaphthalene
4-chlorophenyl phenyl ether
Chrysene
Di-n-butyl phthalate
Di-n-octyl phthalate
Dibenzo(a,h)anthracene
1,2-dichlorobenzene
1,3-dichlorobenzene
1,4-dichlorobenzene
3,3-dichlorobenzidine
Diethyl phthalate
Dimethyl phthalate
2,4-dinitrotoluene
2,6-dinitrotoluene
1,2-diphenylhydrazine
Fluoranthene
Fluorene
Hexachlorobenzene
Hexachlorobutadiene
Hexachlorocyclo-pentadiene
Hexachloroethane
In deno (1, 2, 3 -c d)pyren e
Isophorone
Naphthalene
Nitrobenzene
N-nitrosodi-n-propylamine
N-nitro sodimethylamine
N-nitrosodiphenylamine
Phenanthrene
Pyrene
1,2,4-trichlorobenzene
Reporting. Test results shall be reported on DWR Form -A 1V1R-PPA1 (or in a form approved by the Director)
by December 31st of each designated sampling year. The report shall be submitted to the following address: NC
DENR / DWR / Central Files, 1617 Mail Service Center, Raleigh, North Carolina 27699-1617.
Page 10 of 14

Permit NC0036269
A. (6) CLARIFICATION OF COMPLIANCE WITH PERMIT LIMITS SET AT OR
BELOW MINIMUM LABORATORY PROCEDURE LEVELS
1. The following definitions apply to this permit [REF: EPA National Guidance for the Permitting,
Monitoring and Enforcement of Water Quality -Based Effluent Limitations Set below Analytical Detection/
Quantitation Levels (DRAFT), March 22, 1994].
• The. Method Detection Limit (MDL), as defined by a specific laboratory method, is the minimum
concentration that can be measured and reported with 99 percent confidence that the parameter is
greater than zero (i.e., the analyte is detectable or identifiable at this level, but not quantifiable).
• The Minimum Level (ML) is higher than the MDL, and is defined as the sample concentration
equivalent to the lowest detectable level of the calibration standard not requiring extrapolation, i.e.
the lowest quantifiable level, as defined by a specific analytical procedure.
2. In cases where the Division sets a parameter limit at the ML (as required to protect the receiving -stream
enviromment), the Division shall consider any report of that parameter at or below the ML to be in
compliance.
• Example 1: If the ML is 10.0 µg/L and the permit limit is 10.0 µg/L, any report of 10.0 µg/L or
<10.0 µg/L shall be considered compliant with the permit.
3. In cases where the Division sets a parameter limit below the ML (as required to protect the receiving -
stream environment), the Division shall consider any report of that parameter below the ML to be in
compliance.
• Example 2: If the ML is 10.0 µg/L and the permit limit is 2.0 µg/L, a report of 10µg/L shall not be
compliant, but a report of <10.0 shall be considered compliant.
A. (7) CLARIFICATION OF SAMPLE COLLECTING UNDER
HAZARDOUS CONDITIONS
In accordance with North Carolina State Regulations 15A NCAC 2B.0505(c)(4), the Pennittee may discontinue
receiving -stream monitoring and sample collecting when flow conditions or extreme weather conditions could
result in injury or death of the person(s) collecting the samples. In such cases on the day of sampling, the
Permittee shall record and justify the discontinuance, and furthermore, shall include this justification in that
month's monitoring report. This provision shall also apply to influent and effluent sampling.
Page 11 of 14

Permit NC0036269
A. (8) . MERCURY MINIMIZATION PLAN
The permittee will develop and implement a mercury minimization plan during the term of this permit. The
MMP shall be developed 180 days from the effective day of the permit, and shall be available for inspection on -
site. A sample MMP was developed through a stakeholder review process and has been placed on the Division
website for guidance (http://portal.ncdenr.org/web/wq/swp/ps/npdes, under Mercury Minimization Plan). The
MMP should place emphasis on identification of mercury contributors and goals for reduction. Results shall be
summarized and submitted with the next permit renewal.
A. (9) ELECTRONIC REPORTING OF DISCHARGE MONITORING REPORTS
Proposed federal regulations require electronic submittal of all discharge monitoring reports (DMRs) and
specify that, if a state does not establish a system to receive such submittals, then permittees must submit DMRs
electronically to the Environmental Protection Agency (EPA). The Division anticipates that these regulations
will be adopted and is beginning implementation in late 2013.
NOTE: This special condition supplements or supersedes the following sections within Part ]I of this permit
(Standard Conditions for NPDES Permits):
• Section B. (11.)
• Section D. (2.)
• Section D. (6.)
• Section E. (5.)
Signatory Requirements
Reporting
Records Retention
Monitoring Reports
1. Reporting [Supersedes Section D. (2.) and Section E. (5.) (a)1
Beginning no later than 90 days from the effective date of this permit, the pernittee shall begin reporting
discharge monitoring data electronically using the NC DWR's Electronic Discharge Monitoring Report
(eDMR) internet application.
Monitoring results obtained during the previous month(s) shall be summarized for each month and
submitted electronically using eDMR. The eDMR system allows permitted facilities to enter monitoring
data and submit DMRs electronically using the internet. Until such time that the state's eDMR application
is compliant with EPA's Cross -Media Electronic Reporting Regulation (CROMERR), permittees will be
required to submit all discharge monitoring data to the state electronically using eDMR and will be required
to complete the eDMR submission by printing, signing, and submitting one signed original and a copy of the
computer printed eDMR to the following address:
NC DENR / DWR / Information Processing Unit
ATTENTION: Central Files / eDMR
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
If a permittee is unable to use the eDMR system due to a demonstrated hardship or due to the facility being
physically located in an area where less than 10 percent of the households have broadband access, then a
temporary waiver from the NPDES electronic reporting requirements may be granted and discharge
monitoring data may be submitted on paper DMR forms (MR 1, 1.1, 2, 3) or alternative forms approved by
the Director. Duplicate signed copies shall be submitted to the mailing address above.
Requests for temporary waivers from the NPDES electronic reporting requirements must be submitted in
writing to the Division for written approval at least sixty (60) days prior to the date the facility would be
required under this permit to begin using eDMR. Temporary waivers shall be valid for twelve (12) months
Page 12 of 14

Permit NC0036269
and shall thereupon expire. At such time, DMRs shall be submitted electronically to the Division unless the
pennittee re -applies for and is granted a new temporary waiver by the Division.
Information on eDMR and application for a temporary waiver from the NPDES electronic reporting
requirements is found on the following web page:
http://portal.ncdenr.org/web/wq/admin/bog/ipu/edmr
Regardless of the submission method, the first DMR is due on the last day of the month following the
issuance of the permit or in the case of a new facility, on the last day of the month following the
commencement of discharge.
2. Signatory Requirements [Supplements Section B. (11.) (b) and supersedes Section B. (11.) (d)j
All eDMRs submitted to the permit issuing authority shall be signed by a person described in Part II,
Section B. (11.)(a) or by a duly authorized representative of that person as described in Part II, Section B.
(11.)(b). A person, and not a position, must be delegated signatory authority for eDMR reporting purposes.
For eDMR submissions, the person signing and submitting the DMR must obtain an eDMR user account
and login credentials to access the eDMR system. For more information on North Carolina's eDMR
system, registering for eDMR and obtaining an eDMR user account, please visit the following web page:
http://portal.ncdenr.org/web/wq/admin/bog/ipu/edmr
Certification. Any person submitting an electronic DMR using the state's eDMR system shall make the
following certification [40 CFR 122.22]. NO OTHER STATEMENTS OF CERTIFICATION WILL BE
ACCEPTED:
'7 cert, under penalty of law, that this document and all attachments were prepared under nay direction or
supervision in accordance with a system designed to assure that qualified personnel properly gather and
evaluate the information submitted. Based on my inquiry of the person or persons who manage the system,
or those persons directly responsible for gathering the information, the information submitted is, to the best
of my knowledge and belief true, accurate, and complete. I am aware that there are significant penalties for
submitting false information, including the possibility of fines and imprisonment for knowing violations."
3. Records Retention [Supplements Section D. (6.)]
The pennittee shall retain records of all Discharge Monitoring Reports, includingeDMR submissions.
These records or copies shall be maintained for a period of at least 3 years from the date of the report. This
period may be extended by request of the Director at any time [40 CFR 122.41].
Page 13 of 14

Permit NC0036269
•
Rocky River Regional WWTP — NC0036269
Water and Sewer Authority of Cabarrus County
Receiving Stream: Rocky River Stream Class: C
Drainage Basin: Yadkin -Pee Dee River Basin Sub -Basin: 03-07-12
Permitted Flow: 24, 26.5 & 34 MGD HUC: 03040105
State Grid/USGS Quad: F16SE / Concord SE, N.C.
IN
Facility Location (not to scale)
Latitude 35° 19' 35" Longitude 80° 32' 12"
Page 14 of 14

rindependent Trlbu"ne
Advertising Affidavit
PO_B_.oz 968--�
NCDENR/DWQ
1617 MAIL SERVICE CENTER
RALEIGH, NC 27699-1617
Account Number
3619028� .
Date
September.13'2013- rt
•
Date Category
Description
Ad Number Ad Size
09/19/2013
Legal Notices
Public Notice
North Carolina Environmental Management
Commission/NPDES Unit
1617 Mail Service Center
Raleigh, NC 27699-1617
Notice of Intent to Issue a
NPDES Wastewater Permit
The North Carolina Environmental Management
Commission proposes to issue a NPDES wastewa-
ter discharge permit to the person(s) listed below.
Written comments regarding the proposed permit
will be accepted until 30 days after the publish
date of this notice. The Director of the NC Division
of Water Resources (DWR) may hold a public hear-
ing should there be a significant degree of public
interest. Please mail comments and/or informa-
tion requests to DWR at the above address. Inter-
ested persons may visit the DWR at 512 N. Salis-
bury Street, Raleigh, NC to review information on
file. Additional information on NPDES permits and
this notice may be found on our website: htt :// o
rtal.ncdenr.org/web/wq/swp/ps/npdes/ca en ar,
or by calling [phone]. The Water and Sewer
Authority of Cabarrus Co. has applied for renewal
of NPDES permit NC0036269 for the Rocky River
WWTP in Cabarrus County, discharging domestic
wastewater to the Rocky River In the Yadkin -Pee
Dee River Basin.
Publish: September 13, 2013
Public Notice North Carolina Environmental Managemen
0003095011
Publisher of
Independent Tribune
Cabarrus County
1 x 29 L
Before the undersigned, a Notary Public of Catawba County, North
Carolina, duly commissioned, qualified, and authorized by law to
administer oaths, in said County and State; that he/she is authorized to
make this affidavit and sworn statement; that the notice or other legal
advertisement, a copy of which is attached hereto, was published in the
Independent Tribunp on the following dates:
7
09/13/2013
that the said newspaper in which such notice, or legal advertisement
J/was published, was a newspaper meeting all the requirements and
qualifications of Section 1-597 of the General Statutes of North Carolina.
Newspaper reference: 0003095011
Sworn to and subscribed before me, this
otary Pu lic
My Commission expires:
cyci
.3 day of
Assistant Bookkeeper
11111110
�0TAi
THIS IS NOT A BILL. PLEASE PAY FROM INVOICE. THANK YO(J
n '°LJ B k-\G z
• -',/visit covr;•`•

DENR/DWR
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
NPDES No. NC0036269
Applicant/Facility Name
Facility Information
Water & Sewer Authority of Cabarrus County/Rocky River Regional
WWTP
Applicant Address:
Facility Address:'
Permitted Flow
PO Box 428, Concord, NC 28025
6400 Breezy Lane, Concord, NC 28026
24, 26.5 & 34 MGD
Type of Waste:
Fac lity/Permit Status ""
Domestic 95% / Industrial 5%
Class IV/renewal
Court
Cabarrus
Miscellaneous':.
Receiving; Stream:
Rocky River
Regional Office
Mooresville
Stream .Class ttication:�,
303(d) Listed?
C
Yes
State Grid /.USES:"Quad:.:
Permit ° Writer:
F 16E/Concord SE
Teresa Rodriguez
C:
03040105
Date:
9/4/2013
Drainage Area (ill'
278
Summer 7Q10 (cfs)
25.2
Winter 7Q10 (cfs);
35.2
Average Flow (cfs):
300
59.6 % (24 MGD)
62 % (26.5 MGD)
67.7 % (34 MGD)
Lat. 35° 19' 30.5" N Long. 80° 32' 9.6" W
SUMMARY
The Water and Sewer Authority of Cabarrus County (WSACC) currently operates a Class IV
WWTP with a permitted flow of 24 MGD and phased flows of 26.5 MGD and 34 MGD. The
Rocky River Regional Wastewater Treatment Plant (RRRWWTP) serves a population of 172,415
which includes the Town of Harrisburg, Town of Mount Pleasant, City of Kannapolis, City of
Concord and a portion of Charlotte Mecklenburg Utility service area. The existing WWTP
consists of: influent bar screen, grit removal, four primary clarifiers, first stage aeration, four
secondary -intermediate clarifiers, second stage aeration, four secondary clarifiers, chlorine
disinfection, de -chlorination, sludge thickener, sludge conditioner, biosolids handling facility,
centrifuges, sludge incinerator, sludge ash settling basin, odor control system, and power
generator.
`—The facility has an active pretreatment program with 2 CIU and 12 non -categorical SIUs. The
permit will continue to require the WSACC to implement their pretreatment program.
WSACC submitted the renewal application, Form 2-A, on April 23, 2013. The current permit
expires on October 31, 2013. Two permit modifications have been issued since the permit was
issued in 2008; one in March 2010 to add interim limits for a flow of 26.5 MGD and one in July
2010 to further detail the transition from 24 MGD to 26.5 MGD. The current average monthly
flow is still below the threshold for the tiered limit of 26.5 MGD.
RECEIVING STREAM
This facility discharges to Rocky River in the Yadkin -Pee Dee River Basin, classified C waters in
the Lower Rocky River watershed, HUC 03040105. The Rocky River is listed as impaired for
copper and turbidity in the 2012 303(d) list. The Yadkin -Pee Dee River Basin Plan lists
construction activities and stormwater runoff as the possible causes of high turbidity in the
stream. The cause for the copper impairment is unknown.
Fact/Sheet
NPDES NC00366269 Permit Renewal
Page 1

DMR DATA REVIEW AND VERIFICATION OF EXISTING CONDITIONS
A review of the DMRs for January 2008 through April 2013 shows compliance within permit
limits. Data are summarized in Table 1.
Table 1. Data Summ
Parameter o
Units
Average
Max
Mt• n.
Flow
MGD
14.4
96.6
11
CBOD
mg/1
5.1
20.5
< 2
NH3N
mg/1
1.5
29
< 0.1
TSS
mg/1
17
62
< 25
pH
SU
6.4
8.1
6
DO
mg/1
8.5
12.4
6.1
Temperature
°C
21
26
15
TRC
µg/1
26
49
< 25
TN -
mg/1
21.6
29.2
9.9
TP
mg/1
3.2
6.4
1.0
Fecal Coliform
#/ 100 ml
16.5
> 23000
< 1
MERCURY EVALUATION:
A full mercury evaluation as prescribed in the Permitting Guidance developed for the
implementation of the statewide Mercury TMDL was not completed due to a limited amount of
data. The facility provided the results of four samples for mercury. Based on dilution the water
quality based effluent limitation (WQBEL) for mercury is 20.1 ng/1, while the TBEL is 47 ng/1.
None of the sampling results is greater than the WQBEL. All the sample results are greater
than 1 ng/L, therefore a Mercury Minimization Plan will be required in the permit. A condition
will be added to the permit describing the requirements for the MMP. Monitoring for mercury
will be included in the permit to collect more effluent data.
LIMITS AND MONITORING REQUIREMENTS:
Current conditions, as well as the basis for the limits are summarized in Table 2.
Violations/enforcement cases.
Table 2. Current Permit Conditions and Proposed Changes
CBOD5 (summer)
CBOD5 (winter)
NH3-N (summer)
NH3-N (winter)
TSS
Permit Condfflon
17 mg/1 M.A.
25 mg/1 W.A.
25 mg/1 M.A.
37.5 mg/1 W.A.
4 mg/1 M.A.
12 mg/1 W.A.
10 mg/1 M.A.
30 mg/L W.A
30 mg/1 M.A.
45 mg/1 W.A.
Ixange from Previous:
Permit
No changes
No changes
No changes
Based on modeling results
for protection of DO
standard
Based on modeling results
for protection of DO
standard
40 CFR 122, T15A 2B
.0400: NPDES rules for
secondary treatment of
domestic wastewater
D.O.
> 6 mg/1
No changes
Based on modeling results
Fact Sheet
NPDES NC0036269 Pennit Rene
Page 2
al

Temperature
Daily monitoring
No changes
State WQ standards, T15A
2B .0200
pH
6 to 9 SU
No changes
State WQ standards, T15A
2B .0200
Total residual
chlorine
28 pg/1
No changes
State WQ standards, T15A
2B .0200
Fecal Coliform
200/ 100m1 M.A.
400/100 ml W.A.
No changes
State WQ standards, T15A
2B .0200
TN, TP
Monthly
Monitoring
No changes
T15A 02B .0508
<
Total Copper
Total Zinc
None
Quarterly monitoring
Reasonable potential to
exceed the action level
standards
Total Mercury
Total Selenium
None
Quarterly monitoring
Reasonable potential to
exceed the water quality
standards
Total Chromium
Quarterly
monitoring
Eliminate monitoring
No reasonable potential to
exceed water quality -
standards
REASONABLE POTENTIAL ANALYSIS:
A reasonable potential analysis was performed for arsenic, chromium, copper, zinc, mercury,
nickel and selenium. The analysis showed that copper, mercury, selenium and zinc present
reasonable potential to exceed allowable concentrations. There is limited data for mercury and
selenium and since no value is greater than the allowable limits, monitoring will be required to
obtain enough data to perform reasonable potential gt the next permit renewal. See attached
RPA table for results and recommendations.
INSTREAM MONITORING:
The permit includes instream monitoring at three instream locations, one upstream and two
downstream of the discharge. Monitoring is waived based on the permittee's participation in
the Yadkin -Pee Dee River Basin Association.
PRIORITY POLLUTANT ANALYSIS:
The application includes the results of three priority pollutant analyses. No priority pollutants
were detected in the scan.
AQUATIC TOXICITY TESTING:
Permit requires chronic toxicity, ceriodaphnia dubia, 59.6%, the months of February, May,
August and November. The facility passed all the test except for one test on February 2011 for
which an NOV was issued.
SUMMARY OF PROPOSED CHANGES:
1. Based on the results of the RPA quarterly monitoring for copper, zinc, mercury and
selenium will be added to the permit.
2. A special condition for a Mercury Minimization Plan will be included in the permit.
PROPOSED SCHEDULE FOR PERMIT ISSUANCE
Draft Permit to Public Notice( September 10, 2013
November 4, 2013
Permit Scheduled to Issue:
Fact Sheet:
NPDES NC0036269 Permit Renewal
Page 3

NPDES DIVISION CONTACT
If you have questions regarding any of the above information or on the attached permit, please
contact Teres Rodriguez at 919-807-6387.
NAME:/� v J DATE:
REGIONAL OFFICE COMMENTS
NAME: DATE:
SUPERVISOR: DATE:
Fact Sheet
NPDES NC0036269 Permit Renewal
Page4

n1nw' eed-
RRRWWTP
NC0036269
REASONABLE POTENTIAL ANALYSIS
Qw (MGD) = 24.00
1 Q 10S (cfs) = 20.77
7Q10S(cfs)= 25.20
7Q1OW (cfs)= 35.20
30Q2 (cfs) = NO 30Q2 DATA
Avg. Stream Flow, QA (cfs) = 300.00
Receiving Stream: RockyRiver
WWTP/WTP Class:
IWC @ 1Q10S = 64.17%
IWC @ 7Q1OS = 59.62%
IWC @ 7Q1OW = 51.38%
IWC @ 30Q2 = N/A
IWC@QA= 11.03%
Stream Class: C
Outfall'001
Qw=24MGD'
CHRONIC TEST CONCENTRATION = 59.6%
PARAMETER
TYPE
(1)
STANDARDS & CRITERIA (2)
NC WQS / Applied '/2 FAV /
Chronic Standard
Acute
0
a
REASONABLE POTENTIAL RESULTS
ri #bet. Max Pred
Cw
Allowable Cw
RECOMMENDED ACTION
Arsenic
Arsenic
Chromium
C
C
NC
50 FW(7Q10s)
10 HH/WS(Qavg)
50 FW(7Q10s) 1022
ug/L
.ug/L
ug/L
37 23
37 23
37 8
5.4
5.4
6.8
Acute: NO WQS
Chronic: 83.9
No value > Allowable Cw _ _
Chronic: 90.7
No value > Allowable Cw
Acute: 1,592.6
Chronic: 83.9
No value > Allowable Cw
Copper (AL)
NC
7 FW(7Q10s) 7.3
ug/L
58 43
14
Acute: 11.4
Chronic: 11.7
No value > Allowable Cw
RP, action level` standard, monitor quarterly
Mercury
NC
12 FW(7Q10s)
0.5
ng/L
4 4
Note: n<_9
Limited data set
28.6
Default C.V.
Acute: NO WQS
Chronic: 20.1
No value > Allowable Cw
Limited data, monitor quarterly
Nickel
NC
88 FW(7Q10s) 261
ug/L
37 33
21.6
Acute: 406.7
Chronic: 147.6
No value > Allowable Cw
Selenium
NC
5 FW(7Q10s) 56
ug/L
4 3
Note: n < 9
Limited data sel
12.8
Default C.V.
Acute: 87.3
Chronic: 8.4
No value > Allowable Cw
limited data,'.monitor. quarterly,
Zinc (AL)
NC
50 FW(7Q10s) 67
ug/L
58 58
0 0
0 0
142.0
N/A
N/A
Acute: 104.4
Chronic: 83.9
1 value(s) > Allowable Cw
Acute:
Chronic:
Acute:
Chronic:
RP, action level standard, monitor quarterly . .
Page 1 of 2
36269 RPA 2013 ammended.xlsm, rpa
11/4/2013

REASONABLE POTENTIAL ANALYSIS
Arsenic - FW Standard
1
2
3
4
5
6
7 '
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
Date Data
BDL=1/2DL Results
1 0.5 Std Dev.
1 1 Mean
1 1 C.V.
1 1 n
1 0.5
1 0.5 Mult Factor =
1 0.5 Max. Value
1 0.5 Max. Pred Cw
1 0.5
1 0.5
1 0.5
1 0.5
1 0.5
2 2
1 1
2 2
3 3
1 1
1 0.5
1.5 1.5
1 1
1.4 1.4
1.3 1.3
1.5 1.5
1.3 1.3
1.8 1.8
1.7 1.7
1.3 1.3
1.9 1.9
1.1 1.1
1.3 1.3
1.3 1.3
1.5 1.5
1 0.5
1 0.5
1.1 1.1
1 0.5
USE ONLY
"PASTE
SPECIAL -
Values" WITH
"COPY"
0.5911
1.0811
0.5467
37
1.79
3.0 ug/L
5.4 ug/L
Arsenic - HH/WS Standards
NO "COPY"
THIS SECTION
Date Data BDL=1/2DL Results
1 < 1 0.5 Std Dev. 0.5911
2 0 1 1 Mean 1.0811
3 0 1 1 C.V. 0.5467
4 0 1 1 n 37
5 < 1 0.5
6 < 1 0.5 Mult Factor = 1.79
7 < 1 0.5 Max. Value 3.0 ug/L
8 < 1 0.5 Max. Pred Cw 5.4 ug/L
9 < 1 0.5
10 < 1 0.5
11 < 1 0.5
12 < 1 0.5
13 < 1 0.5
14 0 2 2
15 0 1 1
16 0 2 2
17 0 3 3
18 0 1 1
19 < 1 0.5
20 0 1.5 1.5
21 0 1 1
22 0 1.4 1.4
23 0 1.3 1.3
24 0 1.5 1.5
25 0 1.3 1.3
26 0 1.8 1.8
27 0 1.7 1.7
28 0 1.3 1.3
29 0 1.9 1.9
30 0 1.1 1.1
31 0 1.3 1.3
32 0 1.3 1.3
33 0 1.5 1.5
34 < 1 0.5
35 < 1 0.5
36 0 1.1 1.1
37 < 1 0.5
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
36269 RPA 2013 ammended.xlsm, data
11/4/2013

REASONABLE POTENTIAL ANALYSIS
6
USE ONLY
"PASTE
9
USE ONLY
"PASTE
15
USE ONLY
"PASTE
Chromium
SPECIAL-
Copper (AL)
SPECIAL-
Nickel
SPECIAL -
Values" WITH
Values" WITH
Values" WITH
Date Data
BDL=1/2DL
Results
"COPY"
Date Data
BDL=1/2DL
Results
"COPY"
Date Data
BDL=1/2DL
Results
"COPY"
1
<
0.5 0.25
Std Dev.
0.8254
1
<
20 10
Std Dev.
2.6679
1
4.0 4
Std Dev.
2.0920
2
<
0.5 0.25
Mean
1.2946
2
<
20' 10
Mean
6.2690
2
5.0 5
Mean
3.7919
3
<
0.5 0.25
C.V.
0.6376
3
<
20 10
C.V.
0.4256
3
5.01 5
C.V.
0.5517
4
<
0.5 0.25
n
37
4
<
20' 10
n
58
4
4.0 4
n
37
5
<
2 1
5
<
201 10
5
6
<
2 1
Mult Factor =
1.94
6
<
20 10
Mult Factor =
1.44
6
Mult Factor =
1.80
7
<
2 1
Max. Value
3.5 ug/L
7
<
20 10
Max. Value
10.0 ug/L
7
<'
2.0 1
Max. Value
12.0 ug/L
8
<
2 1
Max. Pred Cw
6.8 ug/L
8
<
20. 10
Max. Pred Cw
14.4 ug/L
8
2.0 2
Max. Pred Cw
21.6 ug/L
9
<
2 1
9
<
20 10
9
-
2.0 2
10
3 3
10
<
20 10
10
4.0 4
11
<
2 1
11
<
20 10
11
6,0 6
12
<
2 1
12
<
20 10
12
3.0 3
13
<
2 1
13
<
20 10
13
3.0 3
14
<
2 1
14
<
20 10
14
3.0 3
15
<
2 1
15
<
20 10
15
3.0 3
16
<
2 1
16
3. 3
16
<
2.0 1
17
<
2 1
17
5 5
17
<-
2.0 1
18
2.5 2.5
18
4 4
18
2.0 2
19
2 2
19
4 4
19
2.0 2
20
3.5 3.5
20
2 2
20
4.0 4
21
2.8. 2.8
21
2 2
21
12.0 12
22
2.5 2.5
22
3 3
22
4.5 4.5
23
<
2 1
23
3 3
23
3.9 3.9
24
2.7 2.7
24
7.3 7.3
24
5.5 5.5
25
2.9 2.9
25
6 ' 6
25
7.3 7.3
26
<
2 1
26
3 3
26
<,
2.0 1
27
<
2 1
27
4• 4
27
2.3 2.3
28
<
2 1
28
3. 3
28
2.8 2.8
29
<
2 1
29
3 3
29
3.0 3
30
<
2 1
30
4 4
30
7.0 7
31
<
2 1
31
4 4
31
4.0 4
32
<
2 1
32
4 4
32
4.7 4.7
33
<
2 1
33
4 4
33
2.6 2.6
34
<
2 1
34
3 3
34
;..j
3.8 3.8
35
<
2 1
35
5' 5
35
4.7 4.7
36
<
2 1
36
4' 4
36
2.8 2.8
37
.<
2 1
37
5; 5
37
!
4.0 4
38
38
5 5
38
4.8 4.8
39
39
6, 6
39
4.6 4.6
40
40
7 7
40
41
41
9.1 9.1
41
42
42
6.1 6.1
42
ryw
43
43
7.9 7.9
43
44
44
6.3 6.3
44
45
45
5, 5
45
46
46
5.2 5.2
46
47
47
5.8 5.8
47
48
48
5.7 5.7
48
49
49
8 8
49
50
50
5. 5
50
51
51
5.3 5.3
51
52
52
5.1, 5.1
52 '
53
53
4 4
53
g,
54
54
4.7 4.7
54
55
55
5.1 5.1
55
m_
56
56
6 6
56
57
57
7.6 7.6
57
58
58
8:4 8.4
58
-2-
36269 RPA 2013 ammended.xlsm, data
11/4/2013

To: Western NPDES Program Unit
Surface Water Protection Section
Attention: Charles Weaver
Date: June 17, 2013
NPDES STAFF REPORT AND RECOMMENDATION
County: Cabarrus
Permit No. NC0036269
PART I - GENERAL INFORMATION
1. Facility and Address: Rocky River WWTP
Water and Sewer Authority of Cabarrus County
PO Box 428
Concord, North Carolina 28026-0428
2. Date of Investigation: June 12, 2013
3. Report Prepared By: Samar Bou-Ghazale, Env. Engineer II
4. Persons Contacted and Telephone Number: Douglas Triece, ORC; [phone]
5. Directions to Site: From the junction of Hwy 601 and Flowes Store Road, travel
southwest on Flowes Store Road approximately 2.1 miles and turn left onto Simplicity
Road. Travel approximately 0.8 mile on Simplicity Road and turn right onto Breezy
Lane. The wastewater treatment plant is located at the end of Breezy Lane.
6. Discharge Point(s). List for all discharge points:
Latitude: 35°19' 22" Longitude: 80° 32' 19"
U.S.G.S. Quad No.: G 16 SE U.S.G.S. Name: Concord, SE N.C.
7. Receiving stream or affected surface waters: Rocky River
a.
b.
c.
Classification: C
River Basin and Subbasin No.: Yadkin Pee -Dee; 03-07-12
Describe receiving stream features and pertinent downstream uses: The receiving
stream in this area is approximately 65-75 feet wide (bank to bank) and has
considerable flow. General C classification uses downstream.
PART II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
1. a. Volume of wastewater to be permitted: 26.5 MGD.

b. What is the current permitted capacity of the wastewater treatment facility? 26.5
MGD
c. Actual treatment capacity of the current facility (current design capacity)? 26.5
MGD
d. Please provide a description of existing or substantially constructed wastewater
treatment facilities: The existing treatment facility consists of two (2) mechanical
influent bar screens, four (4) pump stations; grit removal system, four primary
clarifiers, first stage aeration (pure oxygen); four (4) secondary clarifiers; 5 screw
pumps, second stage aeration (pure oxygen); four (4) final clarifiers; two trains
chlorine disinfection chambers (sodium Hypochlorite); de -chlorination (sodium
bio-sulfate); two (2) sludge thickeners; sludge conditioner (polymer addition);
biosolids handling facility; odor control system, two (2) centrifuges, two (2)
sludge incinerators, two (2) sludge ash basins, alkalinity addition, odor control
system, RAS automotive flow controls, plant automation control system, standby
power generator and pure oxygen generator.
e. Possible toxic impacts to surface waters: None
PART IV - EVALUATION AND RECOMMENDATIONS
The Water and Sewer Authority of Cabarrus County is requesting renewal of its NPDES
Permit for the discharge of treated wastewater.
The Permittee is requesting a list of changes to the permit and includes tiered permit,
supplement to effluent limitations/monitoring requirements -special conditions, sludge
management plan, and other. The request is listed on page 2 and 3 of the application submitted
on April 23, 2013. The MRO agrees with the sludge management plan as proposed in section C
of the renewal application. Regarding the proposed monitoring information listed in section D,
the MRO prefer to treat each occurrence of missed data on a case by case scenario.
The wastewater treatment plant appeared to be in good operational condition during the
time of the investigation.
Pending review and approval by the NPDES Unit, It is recommended that the NPDES
permit be renewed upon the resolution of all requests as listed on page 2 and 3 of this
application.
nature of Repo Preparer Date
War r Quality Regional Supervisor

April 23, 2013
CERTIFIED MAIL
RETURN RECEIPT REQUESTED
Mr. John Hennessy
NCDENR/DWQ/Point Source Branch
1617 Mail Service Center
Raleigh, N.C. 27699-1617
SUBJECT: RENEWAL - NPDES PERMIT NO. NC0036269
ROCKY RIVER REGIONAL WASTEWATER
TREATMENT PLANT
Dear Mr. Hennessy:
The Rocky River Regional Wastewater Treatment Plant (RRRWWTP) is currently
permitted to discharge 24 MGD and 26.5 MGD, respectively, to the Rocky River under
tiered Permit No. NC0036269, which expires on October 31, 2013. There is language
and limits in the current permit that allow for expansion to 34 MGD. This application is
submitted for renewal of the current permit in accordance with the requirement to apply
for renewal six months prior to the expiration of the current permit. Please find enclosed
three (3) copies of the application for the subject permit.
Facility and Operational Changes
Upgrades to RRRWWTP since its last permit cycle are as follow:
1) Installed Imported Biosolids Handling Facility
2) Installed (5) disc pumps in thick sludge and primary pump stations
3) Replacement of (2) Sodium Hypochlorite pumps and ORP meters
4) Odor control system
5) Plant automation control system
6) Upgraded Mt. Pleasant Pump Stations #1 and #2
7) Constructed Reedy Creek Pump Station and Mt. Pleasant Pump Station #3
8) Replacement of Oxygen Plant Cooling Tower

Page 2
Renewal - NPDES Permit No. NC0036269
April 23, 2013
The Plant expansion to 34 MGD will occur when RRRWWTP's effluent flow reaches the
90% mark of its current 26.5 MGD limit. We project this expansion to occur beyond the
next permit cycle.
Permit Renewal Requests
We would appreciate the Division of Water Quality (DWQ) considering the following
requests for this permit renewal. We have grouped information into the following areas:
tiered peiinit, supplement to effluent limitations/ monitoring requirements —special
conditions, sludge management plan, and other.
A. Tiered Permit
WSACC's current permit limits are calculated using a tiered flow rating of 24
MGD, 26.5 MGD, and 34 MGD. We request that the permit renewal include the
existing tiered limits:
O 24 MGD — During the period beginning on the effective date of the permit and
lasting until the flow reaches > 21.6 MGD monthly maximum permit or
permit expiration, the permittee is authorized to discharge from Outfall 001.
O 26.5 MGD — During the permit period beginning when the flow reaches >
21.6 MGD on a maximum monthly basis and lasting until the Division
receives an Engineer's Certification of Completion for expansion above 26.5
MGD or permit expiration, the permittee is authorized to discharge from
Outfall 001.
O 34 MGD — During the period beginning with the receipt of an Engineer's ;j-a
Certification of Completion for expansion above 26.5 MGD and lasting until 3�
permit expiration, the permittee is authorized to discharge from Outfall 001.
B. Supplement to Effluent Limitations/Monitoring Requirements —Special Conditions
Included in RRRWWTP's current perruit is a section titled Supplement to Effluent
Limitations and Monitoring Requirements Special Conditions. We are requesting
that this section, as well as the current language in A. (5) and A. (6) be included in
this permit renewal.

Page 3
Renewal - NPDES Permit No. NC0036269
April 23, 2013
C. Sludge Management Plan
RRRWWTP's primary sludge disposal method is incineration, permitted by the
Division of Air Quality Permit No. 4475R15. In the event of incineration
operation failure, the sludge will be taken to the BFI Landfill, Harrisburg, N.C.
for disposal. Approval from BFI and the Division of Solid Waste has been
obtained for the disposal of both ash and sludge.
The ash is collected in a dual -chamber ash -holding basin which has a four year
capacity. Ash has been sent to the BFI Landfill and was used as daily top cover.
On January 1, 2008, WSACC was issued a Distribution/Land Application Permit
(No. WQ0032332) for various beneficial reuses of incinerator ash.
D. Other
In the event that WSACC experiences the loss of reportable monitoring
information due to events beyond its control, WSACC requests the following
language be included in this NPDES permit renewal as a special condition:
"The loss of acceptable monitoring data shall not constitute a violation of
this permit provided the cause of the loss was unavoidable by the permittee
and/or was beyond the permittee's control. Examples of such a loss
include: samples lost or delayed during shipping and improperly performed
analyses (incorrect analytical methods, expired holding times caused by the
laboratory, over -or -under -dilution of samples, contamination in the
laboratory, etc.). The permittee shall re -sample immediately upon learning
of the sample loss. In such cases, on each event that samples are lost,
written justification for the loss shall be specified in the monitoring report
for the month in which the loss occurred. This provision shall be strictly
construed and may not be utilized to avoid the requirements of this permit
when performance of all monitoring requirements is attainable."
Please provide the fact sheet prepared as part of the draft permit development as soon as
it is available, with justification, if any changes to the permit limits or conditions are
proposed. Include NCDENR documentation that outlines the policies on the use of
metals partitioning and bioavailability in developing peiiiiit limits, policies or procedures
related to establishing monitoring requirements, and procedures to remove monitoring
requirements.

Page 4
Renewal - NPDES Permit No. NC0036269
April 23, 2013
Thank you for your consideration of this matter. If you should have any questions or
need additional information, please contact me at [phone], ext. 11 or Douglas
Triece, Wastewater Operations Manager at ext. 18.
Sincerely,
T. Mark Fowler
Facilities Director
TMF:bll
cc: NCDENR (2)
Douglas Triece, WSACC
Enclosures

FACILITY NAME AND PERMIT NUMBER:
Rocky River Regional Wastewater Treatment Plant, NC0036269
PERMIT ACTION REQUESTED:
Renewal
RIVER BASIN:
Yadkin Pee Dee
SIGNIFICANT INDUSTRIAL USER INFORMATION: i of 14
F.3. Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages
as necessary.
Americhem, Inc
Name:
Address: 723 Commerce Drive
Mailing
Concord, NC 28025
F.4. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
dyes into resins; discharge clean up water
Disperse plastic
F.S. Principal Product(s) and Raw Material(s). Describe at of the principal processes and raw materials that affect or contribute to the SIU's
discharge.
blend of pigment and additives for plastic coloration
Principal product(s): masterbatch(a
surfactants. thermoplastic resin
Raw material(s): pigments,
F.6. Flow Rate.
a. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into
day (gpd) and whether the discharge is continuous or intermittent.
21,000 gpd ( continuous or X intermittent)
the collection system in gallons per
discharged into the collection system
contributed to any problems (e.g.,
b. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow
in gallons per day (gpd) and whether the discharge is continuous or intermittent.
gpd ( continuous or intermittent)
F.7. Pretreatment Standards. Indicate whether the SIU is subject to the
a. Local limits ® Yes
b. Categorical pretreatment standards ❑ Yes
If subject to categorical pretreatment standards, which category and subcategory?
F.B. Problems at the Treatment Works Attributed to Waste Discharge
upsets, interference) at the treatment works in the past three years?
❑ Yes ® No If yes, describe each
following:
❑ No
® No
by the SIU. Has the SIU caused or
episode.
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22.
Page 19 of 35

•
•
FACILITY NAME AND PERMIT NUMBER:
Rocky River Regional Wastewater Treatment Plant, NC0036269
PERMIT ACTION REQUESTED:
Renewal
RIVER BASIN:
Yadkin Pee Dee
SIGNIFICANT INDUSTRIAL USER INFORMATION: 2 of 14
F.3. Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages
as necessary.
Name: Berenfield Containers (S.E.), Ltd.
Mailing Address: 12180 University City Blvd.
Harrisburg, NC 28075
F.4. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Steel drum manufacturer; discharge water from cleaning of steel.
F.5. Principal Product(s) and Raw Material(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's
discharge.
Principal product(s): fabricate steel drums
Raw material(s): cold -rolled steel, cutting oils/lubricants, bolt rings, fittings, silk screen ink, caustic wash, exterior paint, interior chemical
resistant lining, and auxiliary solvents.
F.6. Flow Rate.
a. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into
day (gpd) and whether the discharge is continuous or intermittent.
6,000 gpd ( continuous or X intermittent)
the collection system in gallons per
discharged into the collection system
contributed to any problems (e.g.,
b. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow
in gallons per day (gpd) and whether the discharge is continuous or intermittent.
gpd ( continuous or intermittent)
F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following:
a. Local limits ® Yes
b. Categorical pretreatment standards ❑ Yes
If subject to categorical pretreatment standards, which category and subcategory?
F.8. Problems at the Treatment Works Attributed to Waste Discharge
upsets, interference) at the treatment works in the past three years?
❑ Yes ® No If yes, describe each episode.
❑ No
® No
by the SIU. Has the SIU caused or
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22.
Page 20 of 35

FACILITY NAME AND PERMIT NUMBER:
Rocky River Regional Wastewater Treatment Plant, NC0036269
PERMIT ACTION REQUESTED:
Renewal
RIVER BASIN:
Yadkin Pee Dee
SIGNIFICANT INDUSTRIAL USER INFORMATION: 3 of 14
F.3. Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages
as necessary.
Name: BF! Waste Systems of North America
Mailing Address: 5105 Morehead Road
Concord, NC 28027
F.4. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Pretreated leachate.
F.5. Principal Product(s) and Raw Material(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's
discharge.
Principal landfill: treat contaminated leachate.
product(s):Iined
Raw material(s): NA
F.6. Flow Rate.
c. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into
day (gpd) and whether the discharge is continuous or intermittent.
45,000 gpd ( continuous or X intermittent)
the collection system in gallons per
discharged into the collection system
contributed to any problems (e.g.,
d. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow
in gallons per day (gpd) and whether the discharge is continuous or intermittent.
gpd ( continuous or intermittent)
F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following:
a. Local limits ® Yes
❑ No
® No
b. Categorical pretreatment standards ■ Yes
If subject to categorical pretreatment standards, which category and subcategory?
F.8. Problems at the Treatment Works Attributed to Waste Discharge
upsets, interference) at the treatment works in the past three years?
by the SIU. Has the SIU caused or
IN Yes e No If yes, describe each episode.
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22.
Page 21 of 35

FACILITY NAME AND PERMIT NUMBER:
Rocky River Regional Wastewater Treatment Plant, NC0036269
PERMIT ACTION REQUESTED:
Renewal
RIVER BASIN:
Yadkin Pee Dee
SIGNIFICANT INDUSTRIAL USER INFORMATION: 4 of 14
F.3. Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages
as necessary.
Name: Charlotte -Mecklenburg Utility Department
Mailing Address: 5100 Brookshire Blvd.
Charlotte, NC 28216
F.4. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Domestic, commercial, non -significant industrial users and one significant industrial user.
F.5. Principal Product(s) and Raw Material(s). Describe all of the principal
discharge.
Principal product(s):NA
processes and raw materials that affect or contribute to the SIU's
Raw material(s): NA
F.6. Flow Rate.
e. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into
day (gpd) and whether the discharge is continuous or intermittent.
500 gpd ( continuous or X intermittent)
the collection system in gallons per
discharged into the collection system
contributed to any problems (e.g.,
f. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow
in gallons per day (gpd) and whether the discharge is continuous or intermittent.
3,122,500 gpd (X continuous or intermittent)
F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following:
❑ No
® No
a. Local limits @ Yes
b. Categorical pretreatment standards 0 Yes
If subject to categorical pretreatment standards, which category and subcategory?
F.8. Problems at the Treatment Works Attributed to Waste Discharge
upsets, interference) at the treatment works in the past three years?
by the SIU. Has the SIU caused or
0 Yes CI No If yes, describe each episode.
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22.
Page 22 of 35

FACILITY NAME AND PERMIT NUMBER:
Rocky River Regional Wastewater Treatment Plant, NC0036269
PERMIT ACTION REQUESTED:
Renewal
RIVER BASIN:
Yadkin Pee Dee
SIGNIFICANT INDUSTRIAL USER INFORMATION: 5 of 14
F.3. Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages
as necessary.
Name: Chem -Tex Laboratories
Mailing Address: 2725 Armentrout Drive
Concord, NC 28027
F.4. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Chemical mixer; discharge some rinse water and cleaning of mixing vats.
F.5. Principal Product(s) and Raw Material(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's
discharge.
Principal textile auxiliaries
product(s):
Raw surfactants, alkalies, fatty acids, oils, waxes, and inorganic salts.
material(s):
F.6. Flow Rate.
g. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into
day (gpd) and whether the discharge is continuous or intermittent.
7,000 gpd ( continuous or X intermittent)
the collection system in gallons per
discharged into the collection system
contributed to any problems (e.g.,
h. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow
in gallons per day (gpd) and whether the discharge is continuous or intermittent.
gpd ( continuous or intermittent)
F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following:
a. Local limits 0 Yes • No
b. Categorical pretreatment standards • Yes 0 No
If subject to categorical pretreatment standards, which category and subcategory?
F.8. Problems at the Treatment Works Attributed to Waste Discharge
upsets, interference) at the treatment works in the past three years?
by the SIU. Has the SIU caused or
episode.
❑ Yes 0 No If yes, describe each
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22.
Page 23 of 35

FACILITY NAME AND PERMIT NUMBER:
Rocky River Regional Wastewater Treatment Plant, NC0036269
PERMIT ACTION REQUESTED:
Renewal
RIVER BASIN:
Yadkin Pee Dee
SIGNIFICANT INDUSTRIAL USER INFORMATION: 6 of 14
F.3. Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages
as necessary.
Name: City of Concord — Hillgrove Water Treatment Plant
Mailing Address: P.O. Box 308
Concord, NC 28025
F.4. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Municipal water treatment plant
F.5. Principal Product(s) and Raw Material(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's
discharge.
Principal drinking water
product(s): public
Raw aluminum sulfate, potassium permanganate, sodium hvpochlorite, sodium hydroxide, polymer, polyphosphate and
material(s):
hydrofluosilicic acid.
of process wastewater discharge into
or _intermittent)
of non -process wastewater flow
or intermittent.
or intermittent)
the collection system in gallons per
discharged into the collection system
contributed to any problems (e.g.,
F.6. Flow Rate.
i. Process wastewater flow rate. Indicate the average daily volume
day (gpd) and whether the discharge is continuous or intermittent.
212,000 gpd (X continuous
j. Non -process wastewater flow rate. Indicate the average daily volume
in gallons per day (gpd) and whether the discharge is continuous
gpd ( continuous
F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following:
a. Local limits ® Yes
b. Categorical pretreatment standards ❑ Yes
If subject to categorical pretreatment standards, which category and subcategory?
F.8. Problems at the Treatment Works Attributed to Waste Discharge
upsets, interference) at the treatment works in the past three years?
■ No
® No
by the SIU. Has the SIU caused or
episode.
❑ Yes 02 No If yes, describe each
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22.
Page 24 of 35

FACILITY NAME AND PERMIT NUMBER:
Rocky River Regional Wastewater Treatment Plant, NC0036269
PERMIT ACTION REQUESTED:
Renewal
RIVER BASIN:
Yadkin Pee Dee
SIGNIFICANT INDUSTRIAL USER INFORMATION: 7 of 14
F.3. Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional
pages as necessary.
Name: Galvan Industries, Inc.
Mailing Address: P.O. Box 369
Harrisburg, NC 28075
F.4. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Domestic sewage and boiler blowdown.
F.5. Principal Product(s) and Raw Material(s). Describe all of the principal
discharge.
Principal product(s):NA
processes and raw materials that affect or contribute to the SIU's
Raw caustic, magnesium hydroxide and polymer
material(s):
F.6. Flow Rate.
k. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into
day (gpd) and whether the discharge is continuous or intermittent.
1,100 gpd ( continuous or X intermittent)
the collection system in gallons per
discharged into the collection system
contributed to any problems (e.g.,
I. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow
in gallons per day (gpd) and whether the discharge is continuous or intermittent.
gpd ( continuous or intermittent)
F.7. Pretreatment Standards. Indicate whether the SIU is subject to the
a. Local limits ® Yes
following:
■ No
b. Categorical pretreatment standards ■ Yes :4 No
If subject to categorical pretreatment standards, which category and subcategory?
F8. Problems at the Treatment Works Attributed to Waste Discharge
upsets, interference) at the treatment works in the past three years?
by the SIU. Has the SIU caused or
episode.
• Yes ® No If yes, describe each
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 25 of 35

FACILITY NAME AND PERMIT NUMBER:
Rocky River Regional Wastewater Treatment Plant, NC0036269
PERMIT ACTION REQUESTED:
Renewal
RIVER BASIN:
Yadkin Pee Dee
SIGNIFICANT INDUSTRIAL USER INFORMATION: 8 of 14
F.3. Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages
as necessary.
Name: Leq Resource, Inc.
Mailing Address: 138 Buffalo Avenue, NW
Concord, NC 28025
F.4. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Dyeing ladies' and children's hosiery
F.5. Principal Product(s) and Raw Material(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's
discharge.
F.6.
Principal product(s): hosiery
Raw material(s): nylon and dues
Flow Rate.
m. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into the collection system in
gallons per day (gpd) and whether the discharge is continuous or intermittent.
14,000 gpd ( continuous or X intermittent)
n. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow discharged into the collection system
in gallons per day (gpd) and whether the discharge is continuous or intermittent.
gpd ( continuous or
F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following:
a. Local limits ® Yes ❑ No
b. Categorical pretreatment standards ❑ Yes ® No
intermittent)
If subject to categorical pretreatment standards, which category and subcategory?
F.8. Problems at the Treatment Works Attributed to Waste Discharge by the SIU. Has the SIU caused or contributed to any problems (e.g.,
upsets, interference) at the treatment works in the past three years?
❑ Yes ® No If yes, describe each episode.
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22.
Page 26 of 35

•
FACILITY NAME AND PERMIT NUMBER:
Rocky River Regional Wastewater Treatment Plant, NC0036269
PERMIT ACTION REQUESTED:
Renewal
RIVER BASIN:
Yadkin Pee Dee
SIGNIFICANT INDUSTRIAL USER INFORMATION: 9 of 14
F.3. Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages
as necessary.
Name: CMC- Northeast
Address: 920 Church Street, North
Mailing
Concord, NC 28025
F.4. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
General hospital wastewater.
F.5. Principal Product(s) and Raw Material(s). Describe all of the principal
discharge.
Principal product(s): NA
processes and raw materials that affect or contribute to the SIU's
NA
Raw material(s):
F.6. Flow Rate.
o. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into
day (gpd) and whether the discharge is continuous or intermittent.
92,000 gpd (X continuous or intermittent)
the collection system in gallons per
discharged into the collection system
contributed to any problems (e.g.,
p. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow
in gallons per day (gpd) and whether the discharge is continuous or intermittent.
gpd ( continuous or intermittent)
F.7. Pretreatment Standards. Indicate whether the SIU is subject to the
following:
❑ No
® No
a. Local limits _4 Yes
b. Categorical pretreatment standards ❑ Yes
If subject to categorical pretreatment standards, which category and subcategory?
F.8. Problems at the Treatment Works Attributed to Waste Discharge
upsets, interference) at the treatment works in the past three years?
❑ Yes ® No If yes, describe each
by the SIU. Has the SIU caused or
episode.
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22.
Page 27 of 35

•
•
FACILITY NAME AND PERMIT NUMBER:
Rocky River Regional Wastewater Treatment Plant, NC0036269
PERMIT ACTION REQUESTED:
Renewal
RIVER BASIN:
Yadkin Pee Dee
SIGNIFICANT INDUSTRIAL USER INFORMATION: 10 of 14
F.3. Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages
as necessary.
Name: Perdue Farms
Mailing Address: P.O. Box 248
Concord, NC 28025
F.4. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Wastewater generated from various clean up processes
F.5. Principal Product(s) and Raw Material(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's
discharge.
Principal product(s): cooking and packaging chicken products.
Raw material(s): chicken parts and oils.
F.6. Flow Rate.
q. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into
day (gpd) and whether the discharge is continuous or intermittent.
185,000 gpd (X continuous or intermittent)
the collection system in gallons per
into the collection system
contributed to any problems (e.g.,
r. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow discharged
in gallons per day (gpd) and whether the discharge is continuous or intermittent.
gpd ( continuous or intermittent)
F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following:
a. Local limits ® Yes
b. Categorical pretreatment standards 0 Yes
If subject to categorical pretreatment standards, which category and subcategory?
F.8. Problems at the Treatment Works Attributed to Waste Discharge
upsets, interference) at the treatment works in the past three years?
❑ Yes ® No If yes, describe each episode.
0 No
® No
by the SIU. Has the SIU caused or
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22.
Page 28 of 35

FACILITY NAME AND PERMIT NUMBER:
Rocky River Regional Wastewater Treatment Plant, NC0036269
PERMIT ACTION REQUESTED:
Renewal
RIVER BASIN:
Yadkin Pee Dee
SIGNIFICANT INDUSTRIAL USER INFORMATION: 11 of 14
F.3. Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages
as necessary.
Name: Ei, Inc.
Mailing Address: 2865 N. Cannon Blvd.
Kannapolis, NC 28083
F.4. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Manufacture prescription, over the counter pharmaceuticals, and cosmetic liquids, creams, and ointments, and animal health products.
F.5. Principal Product(s) and Raw Material(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's
discharge.
Principal product(s): pharmaceuticals.
Raw material(s): confidential.
F.6. Flow Rate.
s. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into
day (gpd) and whether the discharge is continuous or intermittent.
1,000 gpd (X continuous or intermittent)
the collection system in gallons per
discharged into the collection system
contributed to any problems (e.g.,
t. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow
in gallons per day (gpd) and whether the discharge is continuous or intermittent.
gpd ( continuous or intermittent)
F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following:
a. Local limits ® Yes
■ No
b. Categorical pretreatment standards ® Yes
If subject to categorical pretreatment standards, which category and subcategory?
F.8. Problems at the Treatment Works Attributed to Waste Discharge
upsets, interference) at the treatment works in the past three years?
❑ No
by the SIU. Has the SIU caused or
■ Yes ® No If yes, describe each episode.
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22.
Page 29 of 35

•
FACILITY NAME AND PERMIT NUMBER:
Rocky River Regional Wastewater Treatment Plant, NC0036269
PERMIT ACTION REQUESTED:
Renewal
RIVER BASIN:
Yadkin Pee Dee
SIGNIFICANT INDUSTRIAL USER INFORMATION: 12 of 14
F.3. Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages
as necessary.
Name: Star America, Inc.
Mailing Address: P.O. Box 1501
Concord, NC 28026-1501
F.4. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Dyeing and boarding hosiery
F.5. Principal Product(s) and Raw Material(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's
discharge.
Principal product(s): ladies' hosiery and children's tights
Raw material(s): nylon and dues
F.6. Flow Rate.
u. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into
day (gpd) and whether the discharge is continuous or intermittent.
72,000 gpd ( continuous or X intermittent)
the collection system in gallons per
discharged into the collection system
contributed to any problems (e.g.,
v. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow
in gallons per day (gpd) and whether the discharge is continuous or intermittent.
gpd ( continuous or intermittent)
F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following:
a. Local limits ® Yes
❑ No
® No
b. Categorical pretreatment standards • Yes
If subject to categorical pretreatment standards, which category and subcategory?
F.8. Problems at the Treatment Works Attributed to Waste Discharge
upsets, interference) at the treatment works in the past three years?
❑ Yes ® No If yes, describe each episode.
by the SIU. Has the SIU caused or
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22.
Page 30 of 35

FACILITY NAME AND PERMIT NUMBER:
Rocky River Regional Wastewater Treatment Plant, NC0036269
PERMIT ACTION REQUESTED:
Renewal
RIVER BASIN:
Yadkin Pee Dee
SIGNIFICANT INDUSTRIAL USER INFORMATION: 13 of 14
F.3. Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages
as necessary.
Name: FCC Environmental, LLC
Mailing Address: 2115 Speedrail Court
Concord, NC 28025
F.4. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Treat industrial wastewater, recycle used petroleum products; discharge water after oil recovered.
F.5. Principal Product(s) and Raw Material(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's
discharge.
Principal recovered oil is sold.
product(s):
Raw material(s): coagulates and flocculates.
F.6. Flow Rate.
w. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge
gallons per day (gpd) and whether the discharge is continuous or intermittent.
36,000 gpd (X continuous or intermittent)
into the collection system in
discharged into the collection system
B
x. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow
in gallons per day (gpd) and whether the discharge is continuous or intermittent.
gpd ( continuous or intermittent)
F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following:
a. Local limits 0 Yes
• No
b. Categorical pretreatment standards 0 Yes
■ No
If subject to categorical pretreatment standards, which category and subcategory?
F.8. Problems at the Treatment Works Attributed to Waste Discharge
upsets, interference) at the treatment works in the past three years?
❑ Yes ® No If yes, describe each episode.
40 CFR 437 subcategory
by the SIU. Has the SIU caused or contributed to any problems (e.g.,
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22.
Page 31 of 35

•
4
FACILITY NAME AND PERMIT NUMBER:
Rocky River Regional Wastewater Treatment Plant, NC0036269
PERMIT ACTION REQUESTED:
Renewal
RIVER BASIN:
Yadkin Pee Dee
SIGNIFICANT INDUSTRIAL USER INFORMATION: 14 of 14
F.3. Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages
as necessary.
Stericycle, Inc.
Name:
4403 Republic Court
Mailing Address:
Concord, NC 28027
F.4. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
medical waste containers, boiler blowdown and domestic sewage.
Clean reuseable
F.5. Principal Product(s) and Raw Material(s). Describe all of the principal
discharge.
Principal product(s):NA
processes and raw materials that affect or contribute to the SIU's
materials
Raw material(s): cleaning
F.6. How Rate.
y. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into
day (gpd) and whether the discharge is continuous or intermittent.
22,000 gpd ( continuous or X intermittent)
the collection system in gallons per
discharged into the collection system
contributed to any problems (e.g.,
z. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow
in gallons per day (gpd) and whether the discharge is continuous or intermittent.
gpd ( continuous or intermittent)
F.7. Pretreatment Standards. Indicate whether the SIU is subject to the
a. Local limits ® Yes
b. Categorical pretreatment standards 0 Yes
If subject to categorical pretreatment standards, which category and subcategory?
F.8. Problems at the Treatment Works Attributed to Waste Discharge
upsets, interference) at the treatment works in the past three years?
following:
❑ No
_� No
by the SIU. Has the SIU caused or
episode.
0 Yes _i No If yes, describe each
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22.
Page 32 of 35

•
•
P r "FY I tittk.W.,70.
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Rocky River Regional WWTP
Water and Sewer Authority of Cabarrus County
State Grid/ USGS Quad: F 16 SE / Concord SE, N.C.
Latitude:
Longitude:
Receiving Stream:
Stream Class:
35° 1935" N
80° 32' 12" W
Rocky River
Permitted Flow:
Sub -basin:
Drainage Basin:
Drawing Date:
Phased 24 MGD, 34 MGD
03-07-12
Yadkin Pee Dee River Basin
04-24-2008
N
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