WQ0031211_Regional Office Historical File Pre 2018

Qq WilliamG. Ross .Tr., Secretary
North Carolina Department of Environment and Natural Resources
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OF�W--A.1 Michael . Easley, Governor
Alan W. Klimek, P.E., Director
MAY 2 2 rtjsion of Water Quality
May 9, 2007
Honorable Joe Lowder, Mayor
Town of Oakboro
P. O. Box 610
Oakboro, North Carolina 28129
Dear Mayor Lowder:
!PATEN QUALITY SECTION
Subject: Permit No. WQ0031211
NC 205 Sewer
Pressure Sewer Extension
Stanly County
In accordance with your permit application received January 5, 2007, and subsequent
additional information received March 29, 2007, we are forwarding herewith Permit No. WQ0031211
dated May 9, 2007, to Town of Oakboro for the construction and operation of the subject wastewater
collection extension. This permit shall be effective from the date of issuance until rescinded, and shall
be subject to the conditions and limitations as specified therein.
Please be advised that the downstream pump station operated by the Town of Oakboro is
currently having issues with compliant operations. Until a plan to return to compliance and
documented evidence is submitted that demonstrates a reduction in inflow and infiltration, other permits
will not be issued for collection systems that are tributary to that pump station.
Please pay particular attention to Permit Condition 3 which requires that the wastewater
collection facilities be properly operated and maintained in accordance with 15A NCAC 2T .0400 or
any individual system wide collection system permit issued to the Permittee.
Permitting of this project does not constitute an acceptance of any part of the project that does
not meet 15A NCAC 2T .0300; the Division of Water Quality's (Division) Gravity Sewer Minimum Design
Criteria adopted February 12, 1996 as applicable; and the Division's Minimum Design Criteria for the
Fast -Track Permitting of Pump Stations and Force Mains adopted June 1, 2000 as applicable, unless
specifically mentioned herein. Division approval is based on acceptance of the certification provided
by a North Carolina -licensed Professional Engineer in the application. It shall be the Permittee's
responsibility to ensure that the as -constructed project meets the appropriate design criteria and rules.
Failure to comply may result in penalties in accordance with North Carolina General Statute § 143-
215.6A through §143-215.6C, construction of additional or replacement wastewater collection facilities,
and/or referral of the North Carolina -licensed Professional Engineer to the licensing board.
If any parts, requirements, or limitations contained in this permit are unacceptable, you have the
right to request an adjudicatory hearing upon written request within 30 days following receipt of this
permit. This request must be in the form of a written petition, conforming to Chapter 150B of North
Carolina General Statutes, and filed with the Office of Administrative Hearings, 6714 Mail Service Center,
Raleigh,, NC 27699-6714. Unless such demands are made this permit shall be final and binding.
hor thCarolina
atura!!i
Pretreatment, Emergency Response and Collection Systems Unit
1617 Mail Service Center, Raleigh, NC 27699-1617
Telephone [phone] Fax [phone]
Internet http://h2o.enr.nc.state.us/ndpu
An Equal Opportunity Action Employer
50% recycled/10% post -consumer paper

Honorable Joe Lowder
May 9, 2007
Page 2
One set of approved plans and specifications is being forwarded to you. If you need additional
information concerning this matter, please contact Bennie Goetze, Jr., P. E. at [phone] extension
375.
Cc:
Sincerely
Alan . Klimek, P. E.
my County Health Departmen
phen Chambers, P. Chambers Engineering, PA, P. O. Box 1726,, Albemarle, NC 28002
ter Quality Central Files
PERCS Files
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NORTH CAROLINA
ENVIRONMENTAL MANAGEMENT COMMISSION
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
RALEIGH
WASTEWATER COLLECTION 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
Town of Oakboro
5tanly County
FOR THE
construction and operation of a pressure sewer collection system consisting of 6, 9-15 GPM pump
stations with simplex pumps, on -site audible and visual high water alarms and approximately 650 linear
feet of 1.5-inch pressure sewer, and approximately 440 linear feet of 2-inch pressure sewer, to serve 6
single family residences in the NC 205 Sewer area, and the discharge of 2,160 GPD of collected
wastewater into the Town of Oakboro's existing sewerage system, pursuant to the application received
January 5, 2007, and subsequent additional information received by the Division, and in conformity with
the project plans, specifications, and other supporting data subsequently filed and approved by the
Department of Environment and Natural Resources and considered a part of this permit.
This permit shall be effective from the date of issuance until rescinded, and shall be subjec
following specified conditions and limitations:
0
he
1. This permit shall become revocable unless the wastewater collection facilities are constructed in
accordance with the conditions of this permit; 15A NCAC 2T .0300; the Division of Water Quality's
(Division) Gravity Sewer Minimum Design Criteria adopted February 12, 1996 as applicable; the
Division's Minimum Design Criteria for the Fast -Track Pemnitting of Pump Stations and Force Mains
adopted June 1, 2000 as applicable; and other supporting materials unless specifically mentioned
herein.
2. This permit is effective only with respect to the nature and volume of wastes described in the
application and other supporting data.
3. The wastewater collection facilities shall be properly maintained and operated at all times. The
Permittee shall maintain compliance with an individual system -wide collection system permit for the
operation and maintenance of these facilities as required by 15A NCAC 2T .0400. If an individual
permit is not required, the following performance criteria shall be met as provided in 15A NCAC 2T
.0400:
a. The sewer system shall be effectively maintained and operated at all times to prevent
discharge to land or surface waters, and any contravention of the groundwater standards in
15A NCAC 2L .0200 or the surface water standards in 15A NCAC 2B .0200.
b. A map of the sewer system shall be developed and shall be actively maintained.
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c. An operation and maintenance plan including pump station inspection frequency,
preventative maintenance schedule, spare parts inventory and overflow response shall be
developed and implemented.
d. Pump stations that are not connected to a telemetry system (Le. remote alarm system) shall
be inspected every day (Le. 365 days per year). Pump stations that are connected to a
telemetry system shall be inspected at least once per week, This requirement does not apply
to pump stations serving a single building associated with a properly permitted pressure sewer
system.
e. High -priority sewer lines shall be inspected by the permittee or its representative at least once
every six -months and inspections documented.
A general observation by the permittee or its representative of the entire sewer system shall be
conducted at least once per year.
Overflows and bypasses shall be reported to the appropriate Division regional office in
accordance with 15A NCAC 2B .0506(a), and public notice shall be provided as required by
North Carolina General Statute §143-215.1C.
h. A Grease Control Program shall be in place as follows.
(1) For publicly owned collection systems, the grease Control Program shall include at least
biannual distribution of educational materials for both commercial and residential users
and the legal means to require grease interceptors for new construction and retrofit, if
necessary, of grease interceptors at existing establishments. The plan shall also include
the legal means for inspection of the grease interceptors, enforcement for violators and
the legal means to control grease entering the system from other public and private
satellite sewer systems.
(2) For privately owned collection systems, the Grease Control Program shall include at lease
biannual distribution of educational materials to users of the collection system by the
permittee or its representative.
Grease education materials shall be distributed more often than required in Parts (1) and
(2) of this subparagraph if necessary to prevent grease related sanitary sewer overflows.
i. Rights -of -ways and easements shall be maintained in the full easement width for personnel
and equipment accessibility.
j. Documentation shall be kept for Subparagraphs 3(a) through 3(i) of this section for a minimum
of three years with the exception of the map, which shall be maintained for the life of the
system.
g.
(3)
4. The sewage and wastewater collected by this system shall be treated in the Town of Oakboro
Wastewater Treatment Facility (NPDES Permit No. NC0043532) prior to being discharged into the
receiving stream.
5. This permit is not transferable. In the event there is a desire for the facilities to change ownership, or
there is a name change of the Permittee, a formal permit request must be submitted to the Division
of Water Quality (Division) accompanied by documentation from the parties involved and other
supporting materials as may be appropriate. The approval of this request will be considered on its
merits and may or may not be approved.
6. Construction of the sewers, pump station(s) and force main shall be scheduled so as not to interrupt
service by the existing utilities nor result in an overflow or bypass discharge of wastewater to the
surface waters of the State.
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7. Per 15A NCAC 2T .01 ] 6, upon completion of construction and prior to operation of these permitted
facilities, the completed Engineering Certification form attached to this permit shall be submitted
with the required supporting documents to the address provided on the form. A complete
certification is one where the form is fully executed and the supporting documents are provided as
applicable.
8. A copy of the approved plans and specifications shall be maintained on file by the Permittee for the
life of the wastewater collection facilities.
9. Failure to abide by the conditions and limitations contained in this permit; 15A NCAC 2T .0300; the
Division's Gravity Sewer Design Criteria adopted February 12, 1996 as applicable; the Division's
Minimum Design Criteria for the Fast -Track Permitting of Pump Station and Force Mains adopted
June 1, 2000 as applicable; and other supporting materials may subject the Permittee to an
enforcement action by the Division, in accordance with North Carolina General Statutes § 143-
215.6A through §143-215.6C.
10. The issuance of this permit does not exempt the Permittee from complying with any and all statutes,
rules, regulations, or ordinances that may be imposed by other government agencies (i.e., local,
state, and federal) having jurisdiction, including but not limited to applicable river buffer rules in 15A
NCAC 2B .0200, soil erosion and sedimentation control requirements in 15A NCAC Chapter 4 and
under the Division's General Permit NCG010000, and any requirements pertaining to wetlands under
15A NCAC 2B .0200 and 15A NCAC 2H .0500.
11. The Permittee shall provide the following items for the pressure sewer system:
a. Pump on/off elevations located so that 2-8 pumping cycles may be achieved per hour in any
centralized pump station serving more than one building.
b. A minimum of 154 gallons of storage capacity above the pump -on activation level to meet the
greater of the Permittee response time for service or the longest non -catastrophic power
outage of the previous three years for any simplex pump station serving a single family
residence.
c. An air relief valve -located at all high points along the force main.
d. A screened vent for the wet well.
e. Fillets located in the wet well(s) at the intersection of the flooring and side walls.
f. Three feet of cover (minimum) over the force main or the use of ferrous material where three
feet cannot be maintained.
g. Sufficient devices which will protect the pump station from vandals.
h. Flood protection if the pump station is located below the 100-year flood elevation.
i. Adherence with the following minimum separations:
(i) Storm sewers (vertical) 12 inches
(ii) Water mains (vertical -water over sewer) 18 inches or (horizontal) 10 feet
(iii) In benched trenches (vertical) 18 inches
(iv) Any private or public water supply source, including any WS-I waters or Class I or Class II
impounded reservoirs used as a source of drinking water 100 feet
(v) Waters classified WS (other than WS-1), B, SA, ORW, HQW, or SB [from normal high water
(or tide elevation)] 50 feet
(vi) Any other stream, lake or impoundment 10 feet
(vii) Any building foundation 5 feet
(viii) Any basement 10 feet
(ix) Top slope of embankment or cuts of 2 feet or more vertical height 10 feet
(x) Drainage systems
(I) Interceptor drains 5 feet
(II) Ground water lowering and surface drainage ditches 10 feet
(xi) Any swimming pool 10 feet
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(xii) Ferrous sewer pipe with joints equivalent to water main standards, shall be used where
these minimum separations cannot be maintained. The minimum separation shall
however not be less than 25 feet from a private well or 50 feet from a public water supply
well;
12. In the event that the facilities fail to perform satisfactorily, including the creation of nuisance
conditions, the Permittee shall take immediate corrective action, including those that may be
required by this Division, such as the construction of additional or replacement wastewater
collection facilities.
13. Noncompliance Notification:
The Permittee shall verbally report to a water quality staff member at the Mooresville Regional
Office, telephone number [phone], as soon as possible, but in no case more than 24 hours or
on the next working day following the occurrence or first knowledge of the occurrence of either of
the following:
a. Any process unit failure, due to known or unknown reasons, that render the facility incapable of
adequate wastewater transport such as mechanical or electrical failures of pumps, line
blockage or breakage, etc.
b. Any failure of a pumping station or sewer line resulting in a by-pass directly to receiving waters
without treatment of all or any portion of the influent to such station or facility.
Voice mail messages or faxed inforrnation is permissible but this shall not be considered as the initial
verbal report. Overflows and spills occurring outside normal business hours may also be reported to
the Division of Emergency Management at telephone number [phone] or [phone].
Persons reporting any of the above occurrences shall file a spill report by completing Part I of Form
CS-SSO (or the most current Division approved form), within five days following first knowledge of the
occurrence. This report shall outline the actions taken or proposed to ensure that the problem does
not recur. Per Condition 1(2), Part II of Form CS-SSO (or the most current Division approved form) can
also be completed to show that the SSO was beyond control.
14. The Permittee shall maintain on hand for immediate installation a supply of spare, fully operational
pump units of each type used in the pressure sewer system. The number of pumps on hand shall not
be less than 10 percent of the number of installed units or one unit, whichever is greater.
15. Each pump station shall be clearly and conspicuously posted with the telephone number of the
owner/operator of the pressure sewer system and instructions to call the number in the event of high
water alarm activation.
Permit issued this the 9th day of May, 2007
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
Klimek, P. E., Director
Division of Water Quality
By Authority of the Environmental Management Commission
Permit Number WQ0031211
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Permit No. WQ003]211
May 9, 2007
System Description:
a pressure sewer collection system consisting of 6, 9-15 GPM pump stations with
simplex pumps, on -site audible and visual high water alarms and approximately
650 linear feet of 1.5-inch pressure sewer, and approximately 440 linear feet of 2-
inch pressure sewer,
Complete and submit this form to the permit issuing office as indicated below with the following:
• One copy of the project record drawings (plan & profile views of sewer lines) of the wastewater
collection -system extension
• Changes to the project should be clearly identified on the record drawings or in written summary
form. Permit modifications are reauired for any changes resultinq_in non-compliance with this permit,
regulations or minimum design criteria.
This project shall not be considered complete nor allowed to operate until this Engineer's Certification
and all required supporting documentation have been received by the Division. Therefore, it is highly
recommended that this certification be sent in a manner that provides proof of receipt by the Division.
ENGINEER'S CERTIFICATION
❑ Partial ❑ Final
I, , as a duly registered Professional Engineer in the State of North Carolina,
having been authorized to observe (❑ periodically, ❑ weekly, ❑ full time) the construction of the
subject project for the Permittee hereby state that, to the best of my abilities, due care and diligence
was used in the_observation of the construction such that the construction was observed to be built
.within substantial compliance of this permit; 15A NCAC 2H .0200; the Division of Water Quality's (Division)
Gravity Sewer Minimum Design Criteria adopted February 12, 1996 as applicable; the Division's Minimum
Design Criteria for the Fast -Track Permitting of Pump Stations and Force Mains adopted June 1, 2000 as
applicable; and other supporting materials.
North Carolina Professional Engineer's seal, signature, and date:
SEND THIS FORM & SUPPORTING DOCUMENTATION
WITH REQUIRED ATTACHMENTS
TO THE FOLLOWING ADDRESS
DIVISION OF WATER QUALITY
PREIREATMENT, EMERGENCY RESPONSE & COLLECTION SYSTEMS UNIT
1617 MAIL SERVICE CENTER
RALEIGH NC 27699-1617
The Permittee is responsible for tracking all partial certifications up until a final certification is received.
Any wastewater flow made tributary to the wastewater collection system extension prior to completion
of this Engineer's Certification shall be considered a violation of the permit and shall subject the
Permittee to appropriate enforcement actions.
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A
v
North Carolina Department of �tt�ttaii
Alan W. KJimek, P.E., Director
Division of Water Quality
March 27, 2007
Honorable Joe Lowder, Mayor
Town of Oakboro
P.O.Box 61©
Oakboro, North Carolina 28129
Subject: Application No. WQ0031211
Additional Information Request
NC 205 Sewer
Wastewater Collection System Extension
Stanly County
Dear Mayor Lowder:
The Pretreatment, Emergency Response and Collection System Unit has conducted a preliminary review of the
subject permit application package. Additional information is required before we can continue our review.
Please address the attached items no later than April 26, 2007.
Please note that comments from the Regional Office are pending at this time, and additional requests may be
necessary to address these comments. Please be aware that you are responsible for meeting all requirements set
forth in North Carolina rules and regulations. Any oversights that occurred in the review of the subject
application package are still the responsibility of the applicant. In addition, any omissions made in responding to
the above items may result in future requests for additional information.
Please reference the subject application number when providing the requested information. Two copies of all
revised and/or additional documentation should be signed, sealed, dated, including a point -by -point response to
the items in the letter, and submittedto the address below. Please note that failure to provide this additional
information on or before the above requested date may result in your application being returned as incomplete.
If you have any questions regarding this request, please do not hesitate to contact Bennie Goetze, Jr., P. E. at
[phone], extension 375. You may also check the future status of this project online at
http://www.ncwaterquality,orgibims/ and following the report links. Thank you for your cooperation.
Sincerely,
Alan W. Klimek, P. E.
nvironmental. Engineer
cc: Ms, Dee Browder, Mooresville Regional Office, Surface Water Protection Section
Mr, Stephen Chambers, P. E., Chambers Engineering, PA, P. O. Box 1726, Albemarle, NC 28002
Permit Application File WQ0O31211
Pretreatment, Emergency Respone & Collection Systems Unit
Location:, 512 N. Salisbury St. Raleigh, NC 27604
Internet: wuw;ncwateruualily.org.
1617 Mail Service Center
Phone [phone]
Fax [phone]
An Equal Opportunity/Affirmative Action Employer ® 50% Recycle /10% Post Consumer Paper
Raleigh, NC 27699-1617
Customer Service
1.877-623-6748

Town of Oakboro
NC 205 Sewers
Pressure Sewers
Application Number WQ0031211
Review Comments
March 27, 2007
General
1. ' Based on the A/E's certification in the Permit Application that all 15A NCAC 2T .0300
requirements regarding gravity sewers and force mains, and the Division of Water Quality's
Gravity Sewer Minimum Design Criteria adopted February 12, 1996 have been met, a review of
these items has not been performed. It shall be the permittee's responsibility to ensure the plans
and specifications meet the appropriate design criteria and rules. Final approval of these
documents will not imply approval of any variance from these criteria unless specifically
requested and granted. Failure to comply may result in penalties in accordance with North
Carolina General Statute 143-215.6A—143-215.6C, construction of additional facilities, and/or
referral of the N.C. Professional Engineer to the licensing board.
2. Please do not bind multiple documents in a single binder with a single A/E seal. When the
documents are separated for filing by this office, the seal is lost for most documents.
3. The application indicates that the entire project is not subject to flooding. The letter provided by
the A/E was not signed and sealed by the engineer as required
4. Calculations
a. Provide the velocities in the force mains.
b. Provide emergency storage calculations in accordance with the attached policy. Show
that the maximum water level in the wetwell will not back waste up into the residences.
The application states that 154 gallons of storage is provided. Sheet 6 of the plans shows
this volume to the top of the wetwell. It is recommended that at least 6 inches of
freeboard be provided as a safety factor.
c. Pump Station Evaluation - Indicate why only the selected days were used in the
evaluation. The analysis does not appear to take into account the alternating pumps.
From the data provided, it appears that the run time should be almost double that shown
in the calculations.
d. The sheet titled Down Stream Sewers mentions a pump station with a 2-inch force main.
The application indicates that the downstream sewer is a 4-inch force main. Please
clarify.
Specifications
1. Special Provisions, Page SP-2, Pipe Separations - Note that DIP is not available in the pipe sizes
being used on this project.
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2. Special Provisions, Page SP-3, Removal of Existing Asphalt - Confirm if DOT will allow open
cut of NC 205 for the lateral installation. Provide bore and jack specifications as appropriate.
3. Special Provisions, Page SP-4 - The leakage formula must be modified. The maximum leakage
is 10 gpdim. See Section 15060, Part 3.3.C.2.
4. Section 01010, Part 1.10 - Clarify the types of permits required. The DWQ Non -Discharge
permit must be issued before the award of contracts.
5. Section 01900, Part 1.1.B, Pipe Cover, Side Ditches - The 3-feet minimum cover must be
maintained.
6. Section 02221, Part 3.3.C.2 - All water removed by dewatering operations shall be disposed of in
a manner that will not violate the NC Sedimentation Pollution Control Act.
7. Section 02660. Part 2.1.A - Sections 15061 and 15062 are not included in these specifications.
S. Section 02660, Part 3.8.A - Structural bridging may also be used where the 24-inch clearance
cannot be met.
9. Section 11077, Part 2.1.A - This section is not in compliance with NCGS 133-3 regarding
procurement. While not a specific requirement of this review, it is recommended that this
section be reviewed and revised as appropriate to avoid the potential for complaints and possible
law suits.
10. Section 15060, Part 3.3.B - The testing given here does not agree with that given in the Special
Provisions - 2-hr vs 4 hr and 200 psi vs 150 psi.
11. Section 15114, Part 2.2 - Consideration should be given to the use of Air/Vacuum release valves
due to severe down slope just past the valve location.
Plans
1. Sheet 2, Note 4 - Confirm if the A/E is to provide site inspection during construction. If not,
indicate who is to do the inspection and provide the certification as required by the permit.
2. Sheet 3
a. Provide calculations to show that the line is actually performing as a force main (i.e. that
based on the slope of the line the flow by gravity is less than the pumped flow.)
b. Due to the possibility of flow away, it is recommended that the ARV be replaced with an
Air/Vacuum release valve.
c. Consideration should be given to' providing an anti -siphon valve in the pump stations
along this down slope portion of the force main.
d. Show the end -of -line cleanout in the profile view.
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Verify the station number at the existing wetwell. By grid it appears to be approximately
10+80. By note it is 18+32.5.
3. Sheet 4 - Add the 1.5-inch pipe to the thrust blocking table.
4. Sheet 5 - Provide an end -of -line cleanout detail.
5. Sheet 6
a. The electrical panel must be labeled with the name and phone number of the 24-hour
emergency contact.
b. The ballast dimensions as shown provide for less than the required 1 cy. of concrete.
These dimensions do not need to be modified, as the soil cover will be more than
adequate to make up the difference. Soil weight was not included in the buoyancy
calculations.
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Policy for Meeting the Reliability Requirements of 5A NCAC 2T .0305(h)( )(D) for
Pressure Sewers Utilizing Simplex Pump Stations
These rules require that multiple pumps be provided with the capacity to pump peak flow with the
largest pump out of service and to provide power reliability respectively. Simplex pump stations will
only be approved for single family residences, all other pump stations shall be required to meet these
rules. To help ensure protection from overflows for simplex pump stations, the following policy will be
implemented in lieu of requiring dual pumps and power reliability.
The first option for meeting reliability requirements is to provide 24 hours storage in the wet well above
the pump -on elevation as requested in the permit application. However, since this may add to the cost
and make installation difficult in certain areas, another option may be pursued.
Alternatively, the applicant may provide documentation regarding both power reliability and response
times for pump replacement.
In the case of power reliability, 3 years of power history data in the area from the power company must
be provided. The amount of storage required shall be equal to the duration of the longest power outage
(minus catastrophic events such hurricanes). Storage shall be provided above the pump -on elevation.
For response times, the applicant shall provide an estimate of the response time to replace a failed pump.
The estimate shall include time for answering after hours calls, travel time to maintenance shop,
preparing equipment to respond, travel time to site, and time to replace the pump. For existing systems,
the Perrnittee should indicate if they currently maintains a supply of pumps on hand at this time (a permit
condition). Also, personnel must be on -call 24 hours a day, 7 days a week as well as a phone number
with 24-hour answering service clearly posted on the pump station. Storage shall be provided above the
high water alarm. A minimum of 120 gallons of storage above alarm shall be included in the evaluation.
These storage requirement are not curnulative, rather, the storage which provides the largest wet weli
shall be specified.
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