NC0022691_Authorization to Construct_20030519

NPDES DOCIMENT 5CANNINO COVER :SHEET
NC0022691
Autumn Forest WWTP
NPDES Permit:
Document Type:
Permit Issuance
Wasteload Allocation
Authorization to Construct
(AtC)
Permit Modification
Complete File - Historical
Engineering Alternatives (EAA)
Plan of Action
Instream Assessment (67b)
Speculative Limits
Environmental
Assessment (EA)
Permit
History
Document Date:
May 19, 2003
ThiEl document is printed on reuse paper - ignore any
contest on the reirersse Elide

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Srvironmenta!
Cairsultants;
�P O BoX2245 Jamestown, WC 27282 336-889-5650
May 19, 2003
Department of Environment and Natural Resources
NPDES Unit
1617 Mail Service Center
Raleigh, NC 27699-1617
Dear Sirs:
Enclosed is the Engineer's Certification for ATC Project No 022691A01, Autumn
Forest WWI?, NPDES Permit No. NC0022691. This project is completed and the
wastewater treatment plant is in operation. If you have any questions concerning this
matter please contact me.
C: Eric Zimmerman, Regional Manager, Chateau Communities
Robert Munro, Facilities Manager, Chateau Communities
Larry Stevens, Community Manager, Chateau Communities

State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
Michael F. Easley, Governor
William G. Ross, Jr., Secretary
Gregory J. Thorpe, Ph.D., Acting Director
ATA
NCDENR
PROFESSIONAL ENGINEER'S CERTIFICATION
FOR
CONSTRUCTION OF WASTEWATER TREATMENT FACILITIES
ATC PROJECT NUMBER: 022691A01
Chateau Communities, Inc. — Autumn Forest WWTP
NPDES Permit No. NC0022691
1 HIarold Jensen
am a duly registered Professional Engineer
(please print)
in the State of North Carolina and have been authorized to observe (circle one: periodically, weekly, full
time) the construction of the subject project for the Permittee:
Project No.: 022691A01
Project: Autumn Forest WWTP
Guilford County
Miscellaneous treatment plant renovations
Location: 3700 East Sourwood Drive
Browns Summit, North Carolina
The project consists of:
• Installation of new 20, 500 gallon equalization tank with bar screen and transfer
pumps
• Installation of a new splitter weir
• Renovation of old backwash holding basin into chlorine contact chamber with tablet
style chlorination
The Division of Water Quality hereby
...acknowledgesof
• Installation of new effluent weir with renovations to the flow meter
• Installation of air blower to equalization basin.
I hereby certify that I did regularly observe this project with due care and diligence
that the construction was completed in substantial conformance with the Authoriza
Construct and with the approved plans and specifications.
Signature
Date S
S.t!� Registration No.
11933
Upon comp etion of construction and prior to operation of the modified facility, the Permittee shall provide the
Division with a certification from a professional engineer certifying that the permitted facility has been installed in
accordance with the NPDES Permit, this Authorization to Construct, and the approved plans and specifications.
The Certification should be submitted to:
NCDENR/DWQ, NPDES Unit, 1617 Mail Service Center, Raleigh, North Carolina 27699-1617

State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
Michael F. Easley, Governor
William G. Ross, Jr., Secretary
Gregory J. Thorpe, Ph.D., Acting Director
April 29, 2002
Mr. Larry Stephens
Chateau Communities, Inc./Autumn Forest MHP
3700 East Sourwood Drive
Browns Summit, North Carolina 27214
AVA
NCDENR
Subject: Authorization to Construct
ATC No. 022691A01
NPDES Permit No. NC0022691
Autumn Forest WWTP
Guilford County
Dear Mr. Stephens:
The Division of Water Quality's NPDES Unit has reviewed your request for an Authorization to Construct at
the Autumn Forest WWTP. The Division finds the proposed improvements to be satisfactory and hereby
grants authorization for the following:
• Installation of new 20, 500 gallon equalization tank with bar screen and transfer
pumps
• Installation of a new splitter weir
• Renovation of old backwash holding basin into chlorine contact chamber with tablet
style chlorination
• Installation of new effluent weir with renovations to the flow meter
• Installation of air blower to equalization basin.
This Authorization to Construct is issued in accordance with NPDES Permit No. NC0022691, issued
May 31, 2001, and shall be subject to revocation unless the wastewater treatment facilities are
constructed in accordance with the terms and conditions of the permit. This permit in no way
affects the permitted flow of 82,000 gallons per day.
The Permittee shall notify the Water Quality Supervisor of the Winston-Salem Regional Office, telephone
number [phone], at least forty-eight (48) hours prior to operation of the installed facilities, so that an
in -place inspection can be made. Notification shall be made during the normal office hours of 8:00 a.m. until
5:00 p.m., Monday through Friday.
Engineer's Certification
Upon completion of construction and prior to operation of the modified facility, the Permittee shall provide
the Division with a certification (copy enclosed) from a professional engineer registered in North Carolina
certifying that the permitted facility has been installed in accordance with the NPDES Permit, this
Authorization to Construct, and the approved plans and specifications. The Certification should be submitted
to: NCDENR / DWQ, NPDES Unit, 1617 Mail Service Center, Raleigh, North Carolina 27699-1617.
1617 Mail Service Center, Raleigh, North Carolina 27699-1617 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer Internet: http://h2o.enr.state.nc.us/

Autumn Forest WWTP
NPDES Permit No. NC0022691
ATC No. 022691A01
Page 2
Requirements for Certified Operator
The Permittee shall employ a certified wastewater treatment plant operator to be in responsible charge (ORC)
of the wastewater treatment facilities. The operator must hold a certificate of the type and grade at least
equivalent to or greater than the classification assigned to the wastewater treatment facilities by the
Certification Commission. The Permittee must also employ a certified back-up operator of the appropriate
type and grade to comply with the conditions of Title 15A, Chapter 8G, .0200. The ORC of the facility must
visit each Class I facility at least weekly and each Class 11, III, and IV facility at least daily, excluding
weekends and holidays; and must properly manage and document daily operation and maintenance of the
facility and comply with all other conditions of Title 15A, Chapter 8G, .0200.
Additional Requirements
The Operational Agreement between the Permittee and the Environmental Management Commission is
incorporated herein by reference and is a condition of this Permit. Noncompliance with the terms of the
Operational Agreement shall subject the Permittee to all sanctions provided by G. S. 143-215.6 for violation
of or failure to act in accordance with the terms and conditions of this Permit.
Failure to abide by the requirements contained in this Authorization to Construct may subject the Permittee
to an enforcement action by the Division of Water Quality in accordance with North Carolina General Statute
143-215.6A to 143-215.6C.
The issuance of this Authorization to Construct does not preclude the Permittee from complying with any and
all statutes, rules, regulations, or ordinances which may be imposed by other government agencies (local,
state, and federal) which have jurisdiction.
The Permittee shall maintain a copy of the approved plans and specifications on file for the life of the
facility. One (1) copy of the approved plans and specifications is enclosed for your records.
If you have any questions about this Authorization to Construct, please contact Natalie Sierra, at (919) 733-
5083, extension 551.
Sincerely,
0v regory J. Thorpe, Ph.D.
Enclosures: Project Plans and Specifications (approved)
Engineer's Certification Form
cc: Winston-Salem Regional Office, Water Quality
Technical Assistance and Certification Unit
Central Files
NPDES Unit Files '
Mr. Harold Jensen, P.E. — Jensen Environmental Consultants
P.O. Box 2245
Jamestown, North Carolina 27282

ATC SUMMARY
Chateau Communities, IncJAutumn Forest
Autumn Forest WWTP
Browns Summit, NC
ATC No. 022691A01
UT to Reedy Fork Creek, Class C-NSW
Cape Fear River Basin, 030602
Guilford County
SCOPE
The scope of the project includes the installation of an equalization basin, renovation of the old
backwash holding basin into a chlorine contact tank with tablet style chlorination, a new splitter
weir, a new effluent weir, renovations to the flow meter and a new air blower for the equalization
basin.
RECOMMENDATIONS
1. Approve installation of new 20, 500 gallon equalization tank with bar
screen and transfer pumps
2. Approve installation of a new splitter weir
3. Approve renovation of old backwash holding basin into chlorine contact
chamber with tablet style chlorination
4. Approve installation of new effluent weir with renovations to the flow
meter
5. Approve installation of air blower to equalization basin.
REVIEW SUMMARY
Executive Summary
The subject facility received an NPDES permit renewal on May 31, 2001. The treatment works
currently consist of:
• Bar screen
• Flow splitter
• Dual aeration basins
• Dual clarifiers
• Chlorine disinfection
• Sludge digester
According to an April 3, 2002 staff report by Jenny Rankin (WSRO), the facility has violated a
number of its permit limitations between January 2000-January 2002. These include flow, BOD,
TSS, NH3-N, fecal coliform and dissolved oxygen. A NOV was issued to the facility after a July 6,
2001 compliance evaluation. Moreover, the April staff report indicates that the facility may require
an SOC while the proposed improvements are underway. It is hoped that the proposed
improvements will allow the operator more control over the facility and generation of a consistent
effluent.
- end -
Page 1

ATC REVIEW NOTES
Project Name: Wastewater Treatment Plant Improvements
Applicant:
Mr. Larry Stephens
Chateau Communities, Inc.
3700 East Sourwood Drive
Browns Summit, North Carolina
Application/Plans Prepared by:
Harold Jensen, P.E.
Jensen Environmental Consultants, P.A.
P.O. Box 2246
Jamestown, North Carolina
Project Location:
Autumn Forest Manufactured Home Community WWTP
Near the intersection of NCSR 2515 and Autumn Forest Drive
Browns Summit, North Carolina
Guilford County
Latitude: 36° 11' 07" Longitude: 79° 43' 17"
Quadrangle: C2ONW/Browns Summit, NC
Chronology:
APP RECD 3/14/02
ACKNOWLEDGED 3/17/02
STAFF RPT REQS 3/17/02
STAFF RPT RECD 4/10/02
Autumn Forest MHP
ATC No. 022691A01
Guilford County
REVIEWED 4/8/02
DENIED NA
RETURNED NA
ISSUED
Does Land Disturbing Activities Exceed One Acre: No
Submissions:
• Letter of Transmittal
• Engineering Plans
• Equipment Vendor Specification Sheets
• Engineering Calculations
Equalization Tank
Number of tanks: one
Type: Square tank, 23'x23'
Capacity: 20,500 gallons (meets 25% permitted flow requirement)
Bar Screen
New bar screens as proposed meet the Metcalf and Eddy requirements for spacing, size, and
approach velocity.
Overflow Weir
The weir seems slightly oversized, if anything, but otherwise fine.
Page 2

Transfer pumps
The peak flow used for the sizing of the transfer pumps is appropriate and pump curves were
provided. Pumps selected are 3" non -clogging submersible pumps sized for 80 gpm.
Chlorine contact chamber
Tablet chlorination has been proposed with 30 minutes of contact time. The size of the existing
(abandoned) backwash tank is more than adequate to hold the peak flow for 30 minutes.
Air blower
The engineer has proposed air blowers sized to 50-cfm/ 1000 ft3 for the equalization basin. This
meets our minimum design criterion. A 15-hp motor will be used to deliver power.
Review Notes:
No provisions have been made for on -site backup power. Given the compliance history of the
facility, I feel it necessary to expedite this project and will place backup power as a requirement of
the Authorization to Construct. Otherwise, I feel this meets our minimum design criteria.
Recommendations
I recommend that the Authorization to Construct be issued for the proposed treatment upgrades.
Page 3