20060098 Ver 1_COMPLETE FILE_20060117

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April 21, 2006
Mr. Mathew E. Blankinship
507 S 4 h Street
Mebane, NC 27302
Subject Property:
Minor Variance
Pace Street Subdivision-Raleigh, NC
[030402, 27-33-18-2, C, NSW]
REQUEST FOR MORE INFORMATION
Dear Mr. Blankinship:
DWQ # 06-0098
Wake County
On January 17, 2006, the Division of Water Quality (DWQ) received your application dated January 16,
2006, with additional information received February 1, 2006 and March 29, 2006, to impact 1,172 square
feet (ft) of Zone 2 of the protected riparian buffers. The DWQ has determined that your application was
incomplete and/or provided inaccurate information as discussed below. The DWQ will require additional
information in order to process your application to impact protected wetlands and/or streams on the
subject property. Therefore, unless we receive five copies of the additional information requested below,
we will have to move toward denial of your application as required by 15A NCAC 2H.0506 and will
place this project on hold as incomplete until we receive this additional information. Please provide the
following information so that we may continue to review your project.
Additional Information Requested:
Please provide an operation and maintenance agreement for the three(3) bioretention areas.
Please contact the DWQ within three weeks of the date of this letter to verify that you have received this
letter and that you remain interested in continuing to pursue permitting of your project and will be
providing the DWQ the requested information at a later date. Please contact me in writing and Eric Kulz
of the Raleigh Regional Office. If we do not hear from you within three weeks, we will assume that you
no longer want to pursue this project and we will consider the project as withdrawn.
This letter only addresses the application review and does not authorize any impacts to wetlands, waters
or protected buffers. Please be aware that any impacts requested within your application are not
authorized (at this time) by the DWQ. Please call Ms. Cyndi Karoly or Mr. Ian McMillan at 919-733-
1786 if you have any questions regarding or would like to set up a meeting to discuss this matter.
401 Oversight/Express Review Permitting Unit
1650 Mail Service Center, Raleigh, North Carolina 27699-1650
2321 Crabtree Boulevard, Suite 250, Raleigh, North Carolina 27604
Phone [phone] / Fax [phone]
Internet: http://w,,?w.ncwaterquality.org
Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E. Director
Division of Water Quality
NOn;`tltCarolina
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An Equal Opportunity/Affirmative Action Employer - 50% Recycled/10% Post Consumer Paper
Matt Blankenship
Page 2 of 2
April 21, 2006
Sincerely,
C ndi Karoly, Supervisor
401 Oversight/Express Review Permitting Unit
CBKlasc
cc: Eric Kulz, Raleigh Regional Office
USACE Raleigh Regulatory Field Office
Jason Payne; S&EC; 11010 Raven Ridge Road; Raleigh, NC 27614
File Copy
Central Files
Filename: 060098PaceStSubdivision(wake)On_Ilold

D Construction Group, Inc.
October 12, 2006
Ms. Cyndi Karoly
NCDENR - Division of Water Quality
401 Oversight / Express Review Program
1650 Mail Service Center
Raleigh, NC 27699-1650
RE: 506 & 508 Pace Street Subdivision - DWQ Project # 06 - 0098
Commencement of Construction
Dear Ms. Karoly:
aT F
pLo_ uDg8
Per your letter of 9/13/2006, we are writing to advise the Division of Water Quality that
construction at the 506 & 508 Pace Street Subdivision has commenced.
We will be coordinating construction and inspection of the stormwater systems with Soil &
Environmental Consultants, our engineer for the project.
If you have any questions, please feel free to contact us - I can be reached at O: [phone]
or M: [phone].
Sincerely,
LEGACYXOISTXVCTION GROUP, INC.
Matt Blankii
Vice Preside
MB
cc: Patrick Smith - S&EC
OCT 10 X986
[1! 'i? ? 'IWAT1IR WA I
LEGACY CONSTRUCTION GROUP, INC. 'j PO Box 6664 ?j RALEIGH, NORTH CAROLINA 27628 ?j 919-829-2545 ?j FAX [phone]
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PROGRAM
RECEIPT
June 2, 2006
DWQ#: 06-0098
COE#: N/A
Matthew Blankinship
507 S. 4`s Street
Mebane, NC 27302
Project: 506 & 508 Pace Street Subdivision County: Wake
() U- 00g8
The North Carolina Ecosystem Enhancement Program (NC EEP) has received a check in the amount of $1,687.68, check
number 2398, as payment for the compensatory mitigation requirements of the 401 Water Quality Certification and/or US
Army Corps of Engineers 404 and/or Division of Coastal Management CAMA permit(s) issued for the above referenced
project. This receipt serves as notification that the compensatory mitigation requirements accepted by NC EEP for this
project have been satisfied. Please note that you must also comply with all other conditions of the certification/permit(s)
including any additional mitigation conditions not accepted by NC EEP and any other state, federal or local government
permits or authorization associated with this activity.
The NC EEP, by acceptance of this payment, acknowledges that the NC EEP is responsible and agrees to provide the
compensatory mitigation requirements as indicated in the table below. The mitigation will be performed in accordance with
the Memorandum of Understanding between the NC Department of Environment and Natural Resources and the US Army
Corps of Engineers dated November 4, 1998.
Wetlands (credits) Stream (credits)
River Basin Cataloging
Unit
Riparian
Non-
Coastal
Cold
Cool
Warm
(sqf fr )
Riparian Marsh
Neuse 03020201 0 0 0 0 0 0 1,758
Please note that a payment made to the Ecosystem Enhancement Program is not reimbursable unless a request for
reimbursement is received within 12 months of the date of the receipt. Any such request must also be accompanied by letters
from the permitting agencies stating that the permit and/or authorization have been rescinded.
If you have any questions or need additional information, please contact Chris Mankoff at [phone].
cc: Cyndi Karoly, Wetlands/401 Unit
Monte Matthews, USACE - Raleigh
Eric Kulz, DWQ Regional Office - Raleigh
File
Sincerely,
bam D. Gilmore, PE
Director p [573
JUN 2 z?a?
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R?StDYGK?... E ... Prot e, Oar It-ate.
NCDENR
North Carolina Ecosystem Enhancement Program, 1652 Mail Service Center, Raleigh, NC 27699-1652 / 919-715-0476 / www.nceep.net
W AT
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Mr. Mathew E. Blankinship
507 S. 4`h Street
Mebane, NC 27302
Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
September 13, 2006
Subject Property: 506 & 508 Pace Street Subdivision
UT Cemetery Branch [030402, 27-33-18-2, C, NSW]
APPROVAL OF STORM WATER MANAGEMENT PLAN
Dear Mr. Blankinship:
Alan W. Klimek, P.E. Director
Division of Water Quality
DWQ Project # 06-0098
County: Wake
The Division of Water Quality (DWQ) has reviewed the Storm Water Management Plan dated received by
DWQ on September 8, 2006 prepared by your engineer, Mr. Patrick K. Smith, P.E., of S&EC. This Plan
satisfies the stormwater conditions required by the Minor Variance issued to you.
The storm water treatment system, which includes bioretention areas, as approved by this Office, and the
drainage patterns depicted on the plan sheets, must be maintained in perpetuity. No changes to the
structural storm water practices shall be made without written authorization from the Division of Water
Quality. The storm water easements shall allow for the ability to maintain the structures, perform
corrective actions, and shall provide protection of the structures from potential alternations by future
property owners.
The applicant and/or authorized agent shall contact the DWQ 401 Oversight/Express Review
Program in writing at the letterhead address within ten (10) days of the commencement of
construction.
This letter completes the review of the Division of Water Quality under Section 401 of the Clean Water
Act. If you have any questions, please contact Cyndi Karoly or Ian McMillan at 919-733-1786.
Sincerely, C,L-?5
/ 4"?
Cyn i B. Karoly, Program Manager
401 Oversight, Express Review Program
CBK/asc
cc: Eric Kulz, DWQ Raleigh Regional Office
Patrick Smith; S&EC; 11010 Raven Ridge Rd; Raleigh, NC 27614
File Copy
Central Files
Filename: 060098BIankinsh ip(Wake)S WMP
401 Oversight/Express Review Permitting Unit
1650 Mail Service Center, Raleigh, North Carolina 27699-1650
2321 Crabtree Boulevard, Suite 250, Raleigh, North Carolina 27604
Phone: [phone] / FAX [phone] / Internet: http7/1h2o enr state nc us/ncwctlands
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An Equal Opportunity/Affirmative Action Employer- 50% Recycled/10% Post Consumer Paper
?oF wArF9p Michael F. Easley, Governor
William G. Ross Jr., Secretary
r North Carolina Department of Environment and Natural Resources
5 y
0 -? Alan W. Klimek, P.E. Director
Division of Water Quality
August 10, 2006
DWQ Project # 06-0098
Wake County
CERTIFIED MAIL: RETURN RECEIPT REQUESTED
Mr. Mathew E. Blankinship
507 S 4ei Street
Mebane, NC 27302
Subject Property: 506 & 508 Pace Street-Pace Street Subdivision, Raleigh, Wake County, NC
Ut to Cemetery Branch [030402, 27-33-18, C, NSW]
APPROVAL OF REQUEST FOR EXTENSION OF BIORETENTION AREA FINAL DESIGN DUE DATE
Dear Mr. Blankinship:
On August 08, 2006, the Division of Water Quality received your letter dated August 3, 2006, regarding an
extension to the due date for submitting the final plans on your bioretention area to meet stormwater
requirements for the project, as required in Condition No. 2 of your Minor Variance, issued to you on May 4,
2006. You have requested an additional 30-day extension of the due date for submitting the final plans on your
bioretention area, which required the plans be submitted by July 4, 2006. The DWQ will hereby grant an
extension for the above-referenced submittal of your final plans for your bioretention area to September 10,
2006. If the required final bioretention area plans are not received by the DWQ by September 10, 2006, your
existing Minor Variance for the above-referenced project may be considered revoked by the DWQ and you will
need to reapply for DWQ approval. This includes submitting a complete application package and all applicable
information.
This letter only addresses the granting of an extension to the due date for submitting the final bioretention area plans
to DWQ to meet the stormwater requirement for the project, as required in Condition No. 2 of your Minor Variance
and does not authorize any impacts to wetlands, waters or protected buffers. Please be aware that any impacts
requested within your application are not authorized (at this time) by the DWQ. Please call Ms. Cyndi Karoly or
Ms. Amy Chapman at 919-733-1786 if you have any questions regarding or would like to set up a meeting to
discuss this matter.
Sincerely,
Cyndi Karoly, Supervisor
401 Oversight/Express Review Permitting Unit
CB K/asc
cc: Eric Kulz, DWQ Raleigh Regional Office
USACE Raleigh Regulatory Field Office
File Copy
Central Files
Patrick Smith, P.E.; S&EC; 11010 Raven Ridge Rd; Raleigh, NC 27614
Filename: 060098PaccStSD(NVakc)Biorctcntion-Due-Date-Extension
401 Oversight/Express Review Permitting Unit
1650 Mail Service Center, Raleigh, North Carolina 27699-1650
2321 Crabtree Boulevard, Suite 250, Raleigh, North Carolina 27604
Phone: [phone] / FAX [phone] / Internet: h"p://h2o.enr.state.nc.us/ncwetlands
_ Dne Carolina
NNf!lrally
An Equal Opportunity/Affirmative Action Employer- 50% Recycled/10% Post Consumer Paper
Soil & Environmental Consultants, PA
11010 Raven Ridge Road • Raleigh, North Carolina 27614 • Phone: [phone] • Fax: [phone]
www.SandEC.com
August 3, 2006
S&EC Project No. 9840.D1
Mr. Ian McMillan
NCDENR - DWQ
Parkview Building
2321 Crabtree Boulevard
Raleigh, NC 27604
J12@2flW70M
AUG 0 8 2006
li7 TigNOS pSTORMV ?I B?RUCH
Reference: Pace Street Subdivision
REVISED Bioretention Area Design - Requested Modifications
DWQ# 06-0098
Dear Mr. McMillan:
The purpose of this letter is to formally apprise you of a delay in the final design
associated with Pace Street Storm Water Project.
As described in my email of July 24, 2006 due to some delays in the development of site
data and prior design commitments we have exceeded the 60 day deadline (from the date
of authorization of the 401) for submittal of the Final Storm Water Plan. As of the date
of this letter we have begun the development of our final design on the proposed bio-
retention areas. We anticipate the need for an additional 4 to 5 weeks for the completion
of our design. We will continue to keep you informed of our progress.
If you have any questions please do not hesitate to contact me via email or phone.
Sincerely,
SO ENVIROMENTAL CONSULTANTS, PA
Patrick KeSi?itl E .
Design Project Manager
Cc: Mr. Matt Blankinship
Mr. Eric Kulz
Pa-e I of I
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May 4, 2006
Mr. Mathew E. Blankinship
507 S 4`h Street
Mebane, NC 27302
Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E. Director
Division of Water Quality
DWQ # 06-0098
Wake County
Subject Property: 506 & 508 Pace Street-Pace Street Subdivision, Raleigh, Wake County, NC
UT to Cemetery Branch [030402, 27-33-18, C NSW]
AUTHORIZATION of Neuse River Riparian Buffer Protection Rules MINOR VARIANCE [15A
NCAC 2B.0233(9)(b)] with ADDITIONAL CONDITIONS
Dear Mr. Blankinship,
You have our authorization, in accord4nce with the conditions listed below, to impact 1,172 (ft)
of Zone 2 of the protected buffers for the proposed residential subdivision on the subject property as
described within your variance request dated January 16, 2006 with additional information received by
the Division of Water Quality on February 1, 2006; February 13, 2006; March 29, 2006 and May 2, 2006.
This letter shall act as your Minor Variance authorization as described within 15A NCAC 213 .0233(9)(b).
In addition, you should get any other required federal, state or local permits before you proceed with your
project including (but not limited to) Sediment and Erosion Control.
This authorization is only valid for the purpose and design that you described in your Minor
Variance Request dated January 16, 2006. If you change your project, you must notify us and you may be
required to send us a new request for authorization. If the property is sold, the new owner must be given
a copy of this authorization and is thereby responsible for complying with all conditions. For this
authorization to be valid, you must follow the conditions listed below.
1. No impacts (except for "exempt" uses as identified within 15A NCAC 2B .0233) shall
occur to Zone 1 of the protected riparian buffers.
2. Written Stormwater Plan (No Further Approval Needed)
The final, written bio-retention plans must be submitted within 60 days from the date of
this authorization to 401 Oversight/Express Review Permitting Unit, North Carolina
Division of Water Quality, 1650 Mail Service Center, Raleigh, NC, 27699-1650. Your
plans must be implemented and the stormwater management facilities shall be
constructed and operational before any permanent building is occupied at the subject site.
The structural stormwater practices as approved by this Office as well as drainage
patterns must be maintained in perpetuity. No changes to the structural stormwater
practices shall be made without written authorization from the Division of Water Quality.
3. Deed Notifications: Deed notifications or similar mechanisms shall be placed on all
retained protective buffers in order to assure compliance for future buffer impacts. These
401 Oversight/Express Review Permits Unit
1650 Mail Service Center, Raleigh, North Carolina 27699-1650
2321 Crabtree Boulevard, Suite 250, Raleigh, North Carolina 27604
Phone: [phone] /FAX [phone] / Internet: http://h2o. e n r. state. nc. us/ncvvetla nds
An Equal Opportunity/Affirmative Action Employer- 50% Recycled/10% Post Consumer Paper
N?o,r? Carolina
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May 4, 2006
Blankinship Variance
Page 2 of 3
mechanisms shall be put in place prior to impacting any buffers approved for impact
under this Authorization Certificate. A sample deed notification can be downloaded from
the 401/Wetlands Unit web site at http://h2o.enr.state.nc.us/ncwetlands. The text of the
sample deed notification may be modified as appropriate to suit to this project.
4. Certificate of Completion
Upon completion of all work approved within this Buffer Authorization, the applicant is
required to return the attached certificate of completion to the 401 Oversight/Express
Review Permitting Unit, North Carolina Division of Water Quality, 1650 Mail Service
Center, Raleigh, NC, 27699-1650.
5. Mitigation: Compensatory Mitigation Using the Ecosystem Enhancement Program (EEP)
Mitigation must be provided for the proposed impacts as specified in the table below. We
understand that you wish to make a payment to the NC Ecosystem Enhancement Program
(EEP) to meet this mitigation requirement. This has been determined by the DWQ to be
a suitable method to meet the mitigation requirement. Until the EEP receives and clears
your check (made payable to: DENR - Ecosystem Enhancement Program Office), no
impacts specified in this Authorization Certificate shall occur. The EEP should be
contacted at [phone] if you have any questions concerning payment into a
restoration fund. You have one month from the date of this authorization to make this
payment. For accounting purposes, this Authorization Certificate authorizes
payment into the Buffer Restoration Fund to meet the following compensatory
mitigation requirement:
Compensatory Mitigation Reference
Required
Zone 2 Buffers 1,172 (square feet) Page 3 on the Minor Variance
Request Form
If you do not accept any of the conditions of this authorization, you may ask for and adjudicatory
hearing. You must act within 60 days of the date that you receive this letter. To ask for a hearing, send a
written petition which conforms to Chapter 150B of the North Carolina General Statutes to the Office of
Administrative Hearings, 6714 Mail Service Center, Raleigh, NC 27699-6714. This authorization and its
conditions are final and binding unless you ask for a hearing.
This letter completes the review of the Division of Water Quality under the Neuse River Riparian
Buffer Protection Rules [15A NCAC 2B.0233(9)(b)]. Please call Amy Chapman at 919-715-6823 if you
have any questions or require copies of our rules or procedural materials.
401 Oversight/Express Review Permits Unit
1650 Mail Service Center, Ralegh, North Carolina 27699-1650
2321 Crabtree Boulevard, Suite 250, Raleigh, North Carolina 27604
Phone: [phone] /FAX [phone] / Internet: http://h2o.enr.state.nc.us/ncwetlands
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Blankinship Variance
Page 3 of 3
Sincerely,
/,7-)Alan W. Klimek, P.E., Director
Division of Water Quality
Cc: Jason Payne; S&EC; 11010 Raven Ridge Rd; Raleigh, NC 27614
Eric Kulz, DWQ Raleigh Regional Office
File Copy
Central Files
AWK/cbk/asc
File: 060098B]ankinship(Wake)VAR
401 Oversight/Express Review Permits Unit
1650 Mail Service Center, Raleigh, North Carolina 27699-1650
2321 Crabtree Boulevard, Suite 250, Raleigh, North Carolina 27604
Phone: [phone] /FAX [phone] / Internet: http://h2o.enr.state.nc.us/ncvvetlands
N r Carolina
?turally
An Equal Opportunity/Affirmative Action Employer- 50% Recycled/10% Post Consumer Paper
W A TFj9p Michael F. Easley, Governor
G William G. Ross Jr., Secretary
r North Carolina Department of Environment and Natural Resources
p Alan W. Klimek, P.E. Director
e__ _Z0' Division of Water Quality
North Carolina Division of Water Quality
401 Water Quality Certification
Summary of Permitted Impacts and Mitigation Requirements
In accordance with 15A NCAC 2H.0500, Mathew E. Blankinship, has permission as outlined below to impact 1,172
square feet (ft) of protected Zone 2 Neuse River basin riparian buffer for the purpose of constructing the proposed
subdivision on the subject property. All activities associated with these authorized impacts must be conducted with
the conditions listed in the attached Permit transmittal letter. THIS PERMIT IS NOT VALID WITHOUT THE
ATTACHMENTS.
COMPENSATORY MITIGATION REQUIREMENTS, ECOSYSTEM ENHANCEMENT PROGRAM
LOCATION: Raleigh, NC
COUNTY Wake
BASIN/ SUB BASIN Neuse/030402, 27-33-18-2
As required by 15A NCAC 2H.0500, and the conditions of this Permit, you are required to compensate for the above
impacts through the restoration, creation, enhancement or preservation of wetlands and surface waters as outlined
below prior to conducting any activities that impact or degrade the waters of the state.
Note: Acreage requirements proposed to be mitigated through the Ecosystem Enhancement Program must be
rounded to one-quarter acre increments and linear foot requirements must be rounded up to the nearest foot
according to 15 2R.0503(b).
Impacts Mitigation
1,172 square feet of Zone 2 Buffers 1,758 square feet of buffers
One of the options you have available to satisfy the compensatory mitigation requirement is through the payment of
a fee to the Buffer Restoration Fund per NCAC 2R.0503. If you choose this option, please sign this form and mail
the form along with a copy of your 401 Certification or Buffer Approval to the Ecosystem Enhancement Program at
the address below. An invoice for the appropriate amount of payment will be sent to you upon receipt of this form.
PLEASE NOTE, THE ABOVE IMPACTS ARE NOT AUTHORIZED UNTIL YOU RECEIVE NOTIFICATION
THAT YOUR PAYMENT HAS BEEN PROCESSED BY THE ECOSYTEM ENHANCMENT PROGRAM.
Signature
Date
ECOSYSTEM ENHANCEMENT PROGRAM
1652 Mail Service Center
RALEIGH, N.C. 27699-1652
[phone]
Filename: 060098BIankinshop(Wake)NBR_EEP
401 Oversight/Express Review Permits Unit
1650 Mail Service Center, Raleigh, North Carolina 27699-1650
2321 Crabtree Boulevard, Suite 250, Raleigh, North Carolina 27604
Phone: [phone] /FAX [phone] / Intemet http://h 2o. en r. state.nc.us/ncwetlands
N One hCarolma
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MATT & WENDY BLANKINSHIP
507 South 4`" Street - Mebane, NC - 27302 - [phone]
May 2, 2006 - Hand Delivery
Ms. Cyndi Karoly
Supervisor
NC DENR Division of Water Quality
Wetlands/ 401 Unit
2321 Crabtree Boulevard, Suite 250
Ralei h NC 27604
RE: Pace Street Subdivision - Raleigh, NC
DWQ Project # 06-0098
Dear Ms. Karoly:
I am writing to respond to your letter of 4/21/2006, regarding the Pace Street subdivision (DWQ project #
06-0098).
In your letter and request for additional information, you requested five copies of operation and
maintenance agreements for the three bioretention areas proposed for lots 1, 2, and 3 of the Pace Street
subdivision.
Enclosed with this letter are five copies of operation and maintenance agreements for each lot - lot # 1,
2, and 3 - original signatures and notary seals are on each copy.
If you have any questions, you can contact me as follows:
Office: [phone]
Cell: [phone]
Home: [phone]
MB
Enclosures
D
MAY 2 zoos
14 0, RkiD STM q W,CH
Cc, w/encl's: Patrick Smith, S&EC (1 copy of each agreement)
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OPERATION AND MAINTENANCE PLAN (O&ND
FOR
BIORETENTION AREA
STORM WATER TREATMENT DEVIC ?,GCOdG D
LOT NO. ? MAY 2 2006
Vi'ET m AtJD STViAr BRANCH
This is the proposed Operation and Maintenance (O&M) Plan for the Bioretention Area
(Storm Water Treatment Device) on Lot No. _L at the Pace Street Subdivision in
Raleigh, NC.
1. Inspection Frequency
The treatment device shall be inspected on a monthly basis and after every significant
runoff producing rainfall event (roughly 1.0 inches of rainfall within a 24-hour period).
2. General Inspection
General inspection activities for the Bioretention Area shall include:
a. Inspection for trash accumulation, condition of vegetative cover including plant
material (trees and shrubs), organic/mulch surface layer, and general device
condition. Litter and debris shall be removed from Bioretention Area.
b. Check and clear any obstructions such that the outlet structure (riser and/or
overflow spillway) functions as intended by the design.
c. Inspect contributing storm water collection system (ie. drains, piping, swales,
riprap, etc.) for condition and proper function.
3. Structural Inspection
Structural inspections of the Bioretention Area shall include the following:
a. Inspect for erosion at the device inlet and outlet. Identify any deficiencies with
the installed method of stabilization to include displacement of mulch, matting,
sod, riprap, or geotextile fabric.
b. Inspect for erosion along the wetland perimeter slopes. Inspect perimeter slopes
for cracking or settling, slope stability, ground cover, the presence of undesirable
or nuisance vegetation.
Pagel of 3
c. Inspect outlet sructures, including but not limited to, the riser, barrel, and
overflow spillway (if applicable) for general condition, deterioration, and proper
operation. Inspect structure for evidence of cracks or leakage in structure.
4. Maintenance and Repairs
Maintenance and repair activities shall include:
a. Repair eroded areas to include perimeter slopes and bed area immediately, re-seed
or apply sod mats as'necessary to maintain good vegetative cover. Mow
bioretention area perimeter cover to maintain maximum height of six (6) inches.
Remove unwanted, undesirable, or invasive herbaceous or woody vegetation.
b. Make repairs to contributing storm water collection system, inlets and outlets, and
outflow structure to maintain proper function.
c. Remove accumulated sediment, organic debris or cake layer, and other debris
from bioretention area. Area shall be regraded to design elevation. Remulch any
areas of missing or thinning mulch. Replace entire mulch layer at least once
every two (2) years.
NOTE: This may be necessary on a more frequent basis early on after
construction until such point as site is stabilized and sediment accumulation is
limited.
NOTE: Removed sediment from any device shall be disposed of in an
appropriate manner (in accordance with local, state, and federal regulations)
and shall be handled in a manner that will not adversely impact water quality.
d. Bioretention area plant densities and species shall be maintained and re-planted in
bare areas as needed. Replant as described in construction drawings. Fertilization
should be kept to a minimum. Treat all diseased trees and shrubs. Remove and
replace all those beyond reasonable treatment. Replace vegetation support stakes
and wires as needed to maintain stability and desired aesthetic.
e. Water newly planted species at a rate of not less than 1-inch per week (including
rainfall) for a period of 90 days after planting. Water entire bioretention area as
necessary during periods of drought to ensure plant health and vegetation density.
It shall be the responsibility of the Owner to schedule the repair of any deficiencies noted
during an inspection.
Permanent access to the Bioretention Area will be granted to NCDENR - Division of
Water Quality (DWQ) by the Owner for the purpose of inspection and/or maintenance.
It will be the responsibility of the Owner to secure the appropriate agreements with
Future Owners should the property be sold. Inspections and maintenance (routine or
otherwise) and their scheduling will be the responsibility of the new Owner upon
completion of sale.
Page 2 of 3
ACKNOWLEDGEMENT:
I acknowledge and agree by my signature below that I am responsible for the
performance of the above listed inspection and maintenance procedures. I agree to notify
NCDENR - DWQ of any problems, other that routine maintenance, with the system prior
to any changes to the system or responsible party.
PrintName• MA"1_U.
Title: (f;I -=Q
Address:
IV I= ? l/ !ate A I r -
Phone: ( (llcf-)
{--
Signature:
Date:
I, Z4WR-d' & 6M?!5 a Notary Public for the State of North Carolina,
County of w1)4-<1< , do hereby certify that /U,&7-7 71z?rO 15-, P
Personally appeared before me this Ny day of and
acknowledged the due execution of the forgoing wetland detention maintenance
requirements. Witness my hand and official seal, *J , ....... NOTARY N=
My commission expires (,l
nnnmut? ``
Page 3 of 3
OPERATION AND MAINTENANCE PLAN (O&A4)
FOR
BIORETENTION AREA
STORM WATER TREATMENT DEVICE
LOT NO. 2-
This is the proposed Operation and Maintenance (O&M) Plan for the Bioretention Area
(Storm Water Treatment Device) on Lot No. 2. at the Pace Street Subdivision in
Raleigh, NC.
1. Inspection Frequency
The treatment device shall be inspected on a monthly basis and after every significant
runoff producing rainfall event (roughly 1.0 inches of rainfall within a 24-hour period).
2. General Inspection
General inspection activities for the Bioretention Area shall include:
a. Inspection for trash accumulation, condition of vegetative cover including plant
material (trees and shrubs), organic/mulch surface layer, and general device
condition. Litter and debris shall be removed from Bioretention Area.
b. Check and clear any obstructions such that the outlet structure (riser and/or
overflow spillway) functions as intended by the design.
c. Inspect contributing storm water collection system (ie. drains, piping, swales,
riprap, etc.) for condition and proper function.
3. Structural Inspection
Structural inspections of the Bioretention Area shall include the following:
a. Inspect for erosion at the device inlet and outlet. Identify any deficiencies with
the installed method of stabilization to include displacement of mulch, matting,
sod, riprap, or geotextile fabric.
b. Inspect for erosion along the wetland perimeter slopes. Inspect perimeter slopes
for cracking or settling, slope stability, ground cover, the presence of undesirable
or nuisance vegetation.
Page 1 of 3
c. Inspect outlet sructures, including but not limited to, the riser, barrel, and
overflow spillway (if applicable) for general condition, deterioration, and proper
operation. Inspect structure for evidence of cracks or leakage in structure.
4. Maintenance and Repairs
Maintenance and repair activities shall include:
a. Repair eroded areas to include perimeter slopes and bed area immediately, re-seed
or apply sod mats as necessary to maintain good vegetative cover. Mow
bioretention area perimeter cover to maintain maximum height of six (6) inches.
Remove unwanted, undesirable, or invasive herbaceous or woody vegetation.
b. Make repairs to contributing storm water collection system, inlets and outlets, and
outflow structure to maintain proper function.
c. Remove accumulated sediment, organic debris or cake layer, and other debris
from bioretention area. Area shall be regraded to design elevation. Remulch any
areas of missing or thinning mulch. Replace entire mulch layer at least once
every two (2) years.
NOTE: This may be necessary on a more frequent basis early on after
construction until such point as site is stabilized and sediment accumulation is
limited.
NOTE: Removed sediment from any device shall be disposed of in an
appropriate manner (in accordance with local, state, and federal regulations)
and shall be handled in a manner that will not adversely impact water quality.
d. Bioretention area plant densities and species shall be maintained and re-planted in
bare areas as needed. Replant as described in construction drawings. Fertilization
should be kept to a minimum. Treat all diseased trees and shrubs. Remove and
replace all those beyond reasonable treatment. Replace vegetation support stakes
and wires as needed to maintain stability and desired aesthetic.
e. Water newly planted species at a rate of not less than 1-inch per week (including
rainfall) for a period of 90 days after planting. Water entire bioretention area as
necessary during periods of drought to ensure plant health and vegetation density.
It shall be the responsibility of the Owner to schedule the repair of any deficiencies noted
during an inspection.
Permanent access to the Bioretention Area will be granted to NCDENR - Division of
Water Quality (DWQ) by the Owner for the purpose of inspection and/or maintenance.
It will be the responsibility of the Owner to secure the appropriate agreements with
Future Owners should the property be sold. Inspections and maintenance (routine or
otherwise) and their scheduling will be the responsibility of the new Owner upon
completion of sale.
Page 2 of 3
ACKNOWLEDGEMENT:
I acknowledge and agree by my signature below that I am responsible for the
performance of the above listed inspection and maintenance procedures. I agree to notify
NCDENR - DWQ of any problems, other that routine maintenance, with the system prior
to any changes to the system or responsible party.
Print Name: -rtl ? lU 145641 F
Title: ©V0, j ?Q
Address: ')n-7 S. --
Phone: (CI L61
Signature:
oFa?°
72
Date: 5 Xyz?'
a Notary Public for the State of North Carolina,
County of , do hereby certify that /1213-7-77f-ErtJ E , LtI-n/k/N5#1p
Personally appeared before me this day of V , _ ZQ and
acknowledged the due execution of the forgoing wetland detention maintenance
requirements. Witness my hand and official seal,
6*zx
My commission expires IqV 4 U S?' / ? Z-Oq
NOTg9y n
?z L
Page 3 of 3

OPERATION AND MAINTENANCE PLAN (O&AI)
FOR
BIORETENTION AREA
STORM WATER TREATMENT DEVICE
LOT NO. t?:;,
This is the proposed Operation and Maintenance (0&M) Plan for the Bioretention Area
(Storm Water Treatment Device) on Lot No. _?> at the Pace Street Subdivision in
Raleigh, NC.
1. Inspection Frequency
The treatment device shall be inspected on a monthly basis and after every significant
runoff producing rainfall event (roughly 1.0 inches of rainfall within a 24-hour period).
2. General Inspection
General inspection activities for the Bioretention Area shall include:
a. Inspection for trash accumulation, condition of vegetative cover including plant
material (trees and shrubs), organic/mulch surface layer, and general device
condition. Litter and debris shall be removed from Bioretention Area.
b. Check and clear any obstructions such that the outlet structure (riser and/or
overflow spillway) functions as intended by the design.
c. ' Inspect contributing storm water collection system (ie. drains, piping, swales,
riprap, etc.) for condition and proper function.
3. Structural Inspection
Structural inspections of the Bioretention Area shall include the following:
a. Inspect for erosion at the device inlet and outlet. Identify any deficiencies with
the installed method of stabilization to include displacement of mulch, matting,
sod, riprap, or geotextile fabric.
b. Inspect for erosion along the wetland perimeter slopes. Inspect perimeter slopes
for cracking or settling, slope stability, ground cover, the presence of undesirable
or nuisance vegetation.
Page 1 of 3
c. Inspect outlet sructures, including but not limited to, the riser, barrel, and
overflow spillway (if applicable) for general condition, deterioration, and proper
operation. Inspect structure for evidence of cracks or leakage in structure.
4. Maintenance and Repairs
Maintenance and repair activities shall include:
a. Repair eroded areas to include perimeter slopes and bed area immediately, re-seed
or apply sod mats as-necessary to maintain good vegetative cover. Mow
bioretention area perimeter cover to maintain maximum height of six (6) inches.
Remove unwanted, undesirable, or invasive herbaceous or woody vegetation.
b. Make repairs to contributing storm water collection system, inlets and outlets, and
outflow structure to maintain proper function.
c. Remove accumulated sediment, organic debris or cake layer, and other debris
from bioretention area. Area shall be regraded to design elevation. Remulch any
areas of missing or thinning mulch. Replace entire mulch layer at least once
every two (2) years.
NOTE: This may be necessary on a more frequent basis early on after
construction until such point as site is stabilized and sediment accumulation is
limited.
NOTE: Removed sediment from any device shall be disposed of in an
appropriate manner (in accordance with local, state, and federal regulations)
and shall be handled in a manner that will not adversely impact water quality.
d. Bioretention area plant densities and species shall be maintained and re-planted in
bare areas as needed. Replant as described in construction drawings. Fertilization
should be kept to a minimum. Treat all diseased trees and shrubs. Remove and
replace all those beyond reasonable treatment. Replace vegetation support stakes
and wires as needed to maintain stability and desired aesthetic.
e. Water newly planted species at a rate of not less than 1-inch per week (including
rainfall) for a period of 90 days after planting. Water entire bioretention area as
necessary during periods of drought to ensure plant health and vegetation density.
It shall be the responsibility of the Owner to schedule the repair of any deficiencies noted
during an inspection.
Permanent access to the Bioretention Area will be granted to NCDENR - Division of
Water Quality (DWQ) by the Owner for the purpose of inspection and/or maintenance.
It will be the responsibility of the Owner to secure the appropriate agreements with
Future Owners should the property be sold. Inspections and maintenance (routine or
otherwise) and their scheduling will be the responsibility of the new Owner upon
completion of sale.
Page 2 of 3
ACKNOWLEDGEMENT:
I acknowledge and agree by my signature below that I am responsible for the
performance of the above listed inspection and maintenance procedures. I agree to notify
NCDENR - DWQ of any problems, other that routine maintenance, with the system prior
to any changes to the system or responsible party.
Print Name' tvjA-T-rV-sw ,
Title: O
Address: J5207 -7? 2
1?oM? oFf3tus 1?lotytt..?
Phone: ?lL?i - la - Z L9 •?l?Z
Signature:
Date: 5 2
I, 46-URA- Notary Public for the State of North Carolina,
County of do hereby certify that f1-7Ti?i?//?,1 P
Personally appeared before me this day of IRA and
acknowledged the due execution of the forgoing wetland detention maintenance
requirements. Witness my hand and official seal,
uFsA Ep
ou? NOT'
:O
v Ue /C
My commission expires lly4 ,l S7' Zuorl'
MY
/II11h RiN atl11111\ \\
Page 3 of 3
0 la- 009 8
OPERATION AND MAINTENANCE PLAN (O&M)
FOR
BIORETENTION AREA n [ C@ Ni
STORM WATER TREATMENT DEVICE w
MAY 2 2006
LOT NO. / DENR - WATER QUALITY
WETLANDS AND STORMNATER BRANCH
This is the proposed Operation and Maintenance (0&M) Plan for the Bioretention Area
(Storm Water Treatment Device) on Lot No. _L at the Pace Street Subdivision in
Raleigh, NC.
1. Inspection Frequency
The treatment device shall be inspected on a monthly basis and after every significant
runoff producing rainfall event (roughly 1.0 inches of rainfall within a 24-hour period).
2. General Inspection
General inspection activities for the Bioretention Area shall include:
a. Inspection for trash accumulation, condition of vegetative cover including plant
material (trees and shrubs), organic/mulch surface layer, and general device
condition. Litter and debris shall be removed from Bioretention Area.
b. Check and clear any obstructions such that the outlet structure (riser and/or
overflow spillway) functions as intended by the design.
c. Inspect contributing storm water collection system (ie. drains, piping, swales,
riprap, etc.) for condition and proper function.
3. Structural Inspection
Structural inspections of the Bioretention Area shall include the following:
a. Inspect for erosion at the device inlet and outlet. Identify any deficiencies with
the installed method of stabilization to include displacement of mulch, matting,
sod, riprap, or geotextile fabric.
b. Inspect for erosion along the wetland perimeter slopes. Inspect perimeter slopes
for cracking or settling, slope stability, ground cover, the presence of undesirable
or nuisance vegetation.
Page 1 of 3
c. Inspect outlet sructures, including but not limited to, the riser, barrel, and
overflow spillway (if applicable) for general condition, deterioration, and proper
operation. Inspect structure for evidence of cracks or leakage in structure.
4. Maintenance and Repairs
Maintenance and repair activities shall include:
a. Repair eroded areas to include perimeter slopes and bed area immediately, re-seed
or apply sod mats as necessary to maintain good vegetative cover. Mow
bioretention area perimeter cover to maintain maximum height of six (6) inches.
Remove unwanted, undesirable, or invasive herbaceous or woody vegetation.
b. Make repairs to contributing storm water collection system, inlets and outlets, and
outflow structure to maintain proper function.
c. Remove accumulated sediment, organic debris or cake layer, and other debris
from bioretention area. Area shall be regraded to design elevation. Remulch any
areas of missing or thinning mulch. Replace entire mulch layer at least once
every two (2) years.
NOTE: This may be necessary on a more frequent basis early on after
construction until such point as site is stabilized and sediment accumulation is
limited.
NOTE: Removed sediment from any device shall be disposed of in an
appropriate manner (in accordance with local, state, and federal regulations)
and shall be handled in a manner that will not adversely impact water quality.
d. Bioretention area plant densities and species shall be maintained and re-planted in
bare areas as needed. Replant as described in construction drawings. Fertilization
should be kept to a minimum. Treat all diseased trees and shrubs. Remove and
replace all those beyond reasonable treatment. Replace vegetation support stakes
and wires as needed to maintain stability and desired aesthetic.
e. Water newly planted species at a rate of not less than 1-inch per week (including
rainfall) for a period of 90 days after planting. Water entire bioretention area as
necessary during periods of drought to ensure plant health and vegetation density.
It shall be the responsibility of the Owner to schedule the repair of any deficiencies noted
during an inspection.
Permanent access to the Bioretention Area will be granted to NCDENR - Division of
Water Quality (DWQ) by the Owner for the purpose of inspection and/or maintenance.
It will be the responsibility of the Owner to secure the appropriate agreements with
Future Owners should the property be sold. Inspections and maintenance (routine or
otherwise) and their scheduling will be the responsibility of the new Owner upon
completion of sale.
Page 2 of 3
ACKNOWLEDGEMENT:
I acknowledge and agree by my signature below that I am responsible for the
performance of the above listed inspection and maintenance procedures. I agree to notify
NCDENR - DWQ of any problems, other that routine maintenance, with the system prior
to any changes to the system or responsible party.
Print Name: MA t { V.
Title: cOVA/t'j?Q
Address: ?-7 S. t,).,- -
Phone:

7Z
Signature:
I, 4/t ARd- E-4om:gL S , a Notary Public for the State of North Carolina,
County of WW-kE , do hereby certify that /R#77"ffApO E. /3l?/l?K/NS /P
Personally appeared before me this day of /R , . and
acknowledged the due execution of the forgoing wetland detention maintenance
requirements. Witness my hand and official seal,
KV,
6faa'4? _q
5`?ALA R Y
My commission expires lq-U461 S7: F U B L 1 C;
Page 3 of 3

OPERATION AND MAINTENANCE PLAN (O& A/1)
FOR
BIORETENTION AREA
STORM WATER TREATMENT DEVICE
LOT NO. 2
This is the proposed Operation and Maintenance (0&M) Plan for the Bioretention Area
(Storm Water Treatment Device) on Lot No. 2. at the Pace Street Subdivision in
Raleigh, NC.
1. Inspection Frequency
The treatment device shall be inspected on a monthly basis and after every significant
runoff producing rainfall event (roughly 1.0 inches of rainfall within a 24-hour period).
2. General Inspection
General inspection activities for the Bioretention Area shall include:
a. Inspection for trash accumulation, condition of vegetative cover including plant
material (trees and shrubs), organic/mulch surface layer, and general device
condition. Litter and debris shall be removed from Bioretention Area.
b. Check and clear any obstructions such that the outlet structure (riser and/or
overflow spillway) functions as intended by the design.
c. Inspect contributing storm water collection system (ie. drains, piping, swales,
riprap, etc.) for condition and proper function.
3. Structural Inspection
Structural inspections of the Bioretention Area shall include the following:
a. Inspect for erosion at the device inlet and outlet. Identify any deficiencies with
the installed method of stabilization to include displacement of mulch, matting,
sod, riprap, or geotextile fabric.
b. Inspect for erosion along the wetland perimeter slopes. Inspect perimeter slopes
for cracking or settling, slope stability, ground cover, the presence of undesirable
or nuisance vegetation.
Page 1 of 3
c. Inspect outlet sructures, including but not limited to, the riser, barrel, and
overflow spillway (if applicable) for general condition, deterioration, and proper
operation. Inspect structure for evidence of cracks or leakage in structure.
4. Maintenance and Repairs
Maintenance and repair activities shall include:
a. Repair eroded areas to include perimeter slopes and bed area immediately, re-seed
or apply sod mats as necessary to maintain good vegetative cover. Mow
bioretention area perimeter cover to maintain maximum height of six (6) inches.
Remove unwanted, undesirable, or invasive herbaceous or woody vegetation.
b. Make repairs to contributing storm water collection system, inlets and outlets, and
outflow structure to maintain proper function.
Remove accumulated sediment, organic debris or cake layer, and other debris
from bioretention area. Area shall be regraded to design elevation. Remulch any
areas of missing or thinning mulch. Replace entire mulch layer at least once
every two (2) years.
NOTE: This may be necessary on a more frequent basis early on after
construction until such point as site is stabilized and sediment accumulation is
limited.
NOTE: Removed sediment from any device shall be disposed of in an
appropriate manner (in accordance with local, state, and federal regulations)
and shall be handled in a manner that will not adversely impact water quality.
d. Bioretention area plant densities and species shall be maintained and re-planted in
bare areas as needed. Replant as described in construction drawings. Fertilization
should be kept to a minimum. Treat all diseased trees and shrubs. Remove and
replace all those beyond reasonable treatment. Replace vegetation support stakes
and wires as needed to maintain stability and desired aesthetic.
e. Water newly planted species at a rate of not less than 1-inch per week (including
rainfall) for a period of 90 days after planting. Water entire bioretention area as
necessary during periods of drought to ensure plant health and vegetation density.
It shall be the responsibility of the Owner to schedule the repair of any deficiencies noted
during an inspection.
Permanent access to the Bioretention Area will be granted to NCDENR - Division of
Water Quality (DWQ) by the Owner for the purpose of inspection and/or maintenance.
It will be the responsibility of the Owner to secure the appropriate agreements with
Future Owners should the property be sold. Inspections and maintenance (routine or
otherwise) and their scheduling will be the responsibility of the new Owner upon
completion of sale.
Page 2 of 3
ACKNOWLEDGEMENT:
I acknowledge and agree by my signature below that I am responsible for the
performance of the above listed inspection and maintenance procedures. I agree to notify
NCDENR - DWQ of any problems, other that routine maintenance, with the system prior
to any changes to the system or responsible parry.
Print Name: - tyU- :M,
Title: 0Wt,jp-F Q
Address: 1520'7
l?oM? oFpt? M©b??
Phone: 1fl) '-1 - 4t?Z
Signature:
Date:
I, 4&-taw- S -"a Notary Public for the State of North Carolina,
County of - WWI< L? , do hereby certify that Ad- & 1?4j BG9n?X/?S?f?P
Personally appeared before me this day of /? , . and
acknowledged the due execution of the forgoing wetland detention maintenance
requirements. Witness my hand and official seal,
NOTAR1;:N
?z'•?uBLIC,
My commission expires 1q-V4i <7: l C'f J y' ''%,,9' :C , . • ?G;??'
Page 3 of 3
OPERATION AND MAINTENANCE PLAN (O&M)
FOR
BIORETENTION AREA
STORM WATER TREATMENT DEVICE
LOT NO. ?
This is the proposed Operation and Maintenance (O&M) Plan for the Bioretention Area
(Storm Water Treatment Device) on Lot No. _? at the Pace Street Subdivision in
Raleigh, NC.
1. Inspection Frequency
The treatment device shall be inspected on a monthly basis and after every significant
runoff producing rainfall event (roughly 1.0 inches of rainfall within a 24-hour period).
2. General Inspection
General inspection activities for the Bioretention Area shall include:
a. Inspection for trash accumulation, condition of vegetative cover including plant
material (trees and shrubs), organic/mulch surface layer, and general device
condition. Litter and debris shall be removed from Bioretention Area.
b. Check and clear any obstructions such that the outlet structure (riser and/or
overflow spillway) functions as intended by the design.
c. Inspect contributing storm water collection system (ie. drains, piping, swales,
riprap, etc.) for condition and proper function.
3. Structural Inspection
Structural inspections of the Bioretention Area shall include the following:
a. Inspect for erosion at the device inlet and outlet. Identify any deficiencies with
the installed method of stabilization to include displacement of mulch, matting,
sod, riprap, or geotextile fabric.
b. Inspect for erosion along the wetland perimeter slopes. Inspect perimeter slopes
for cracking or settling, slope stability, ground cover, the presence of undesirable
or nuisance vegetation.
Page 1 of 3
c. Inspect outlet sructures, including but not limited to, the riser, barrel, and
overflow spillway (if applicable) for general condition, deterioration, and proper
operation. Inspect structure for evidence of cracks or leakage in structure.
4. Maintenance and Repairs
Maintenance and repair activities shall include:
a. Repair eroded areas to include perimeter slopes and bed area immediately, re-seed
or apply sod mats as necessary to maintain good vegetative cover. Mow
bioretention area perimeter cover to maintain maximum height of six (6) inches.
Remove unwanted, undesirable, or invasive herbaceous or woody vegetation.
b. Make repairs to contributing storm water collection system, inlets and outlets, and
outflow structure to maintain proper function.
c. Remove accumulated sediment, organic debris or cake layer, and other debris
from bioretention area. Area shall be regraded to design elevation. Remulch any
areas of missing or thinning mulch. Replace entire mulch layer at least once
every two (2) years.
NOTE: This may be necessary on a more frequent basis early on after
construction until such point as site is stabilized and sediment accumulation is
limited.
NOTE: Removed sediment from any device shall be disposed of in an
appropriate manner (in accordance with local, state, and federal regulations)
and shall be handled in a manner that will not adversely impact water quality.
d. Bioretention area plant densities and species shall be maintained and re-planted in
bare areas as needed. Replant as described in construction drawings. Fertilization
should be kept to a minimum. Treat all diseased trees and shrubs. Remove and
replace all those beyond reasonable treatment. Replace vegetation support stakes
and wires as needed to maintain stability and desired aesthetic.
e. Water newly planted species at a rate of not less than 1-inch per week (including
rainfall) for a period of 90 days after planting. Water entire bioretention area as
necessary during periods of drought to ensure plant health and vegetation density.
It shall be the responsibility of the Owner to schedule the repair of any deficiencies noted
during an inspection.
Permanent access to the Bioretention Area will be granted to NCDENR - Division of
Water Quality (DWQ) by the Owner for the purpose of inspection and/or maintenance.
It will be the responsibility of the Owner to secure the appropriate agreements with
Future Owners should the property be sold. Inspections and maintenance (routine or
otherwise) and their scheduling will be the responsibility of the new Owner upon
completion of sale.
Page 2 of 3
ACKNOWLEDGEMENT:
I acknowledge and agree by my signature below that I am responsible for the
performance of the above listed inspection and maintenance procedures. I agree to notify
NCDENR - DWQ of any problems, other that routine maintenance, with the system prior
to any changes to the system or responsible party.
Print Name: fvjg-(-Ig.t.,4{J1Ut?s l#?
Title• Owt jr- ?
Address' Z -7
Phone:
Signature:
?Z
I, z4w)ek E-40M?z ?5a Notary Public for the State of North Carolina,
County of w)4-k , do hereby certify that 94-772}6M) L &AUkl,)sff/P
Personally appeared before me this day of and
acknowledged the due execution of the forgoing wetland detention malt?}??e
requirements. Witness my hand and official seal, J,•• p
3 ?'• 0 T A R •y :N
•N -
,PUBLI
?
My commission expires u 7-
Page 3 of 3
DID - 009 g
OPERATION AND MAINTENANCE PLAN (O&M)
FOR
BIORETENTION AREA
STORM WATER TREATIVIENTDEVICE 6g
=
LOT NO. ? MAY 2 2006
DENR - WATER QUALITY
VOLANDS AND STORMWATER BRANCH
This is the proposed Operation and Maintenance (0&M) Plan for the Bioretention Area
(Storm Water Treatment Device) on Lot No. _L at the Pace Street Subdivision in
Raleigh, NC.
1. Inspection Frequency
The treatment device shall be inspected on a monthly basis and after every significant
runoff producing rainfall event (roughly 1.0 inches of rainfall within a 24-hour period).
2. General Inspection
General inspection activities for the Bioretention Area shall include:
a. Inspection for trash accumulation, condition of vegetative cover including plant
material (trees and shrubs), organic/mulch surface layer, and general device
condition. Litter and debris shall be removed from Bioretention Area.
b. Check and clear any obstructions such that the outlet structure (riser and/or
overflow spillway) functions as intended by the design.
c. Inspect contributing storm water collection system (ie. drains, piping, swales,
riprap, etc.) for condition and proper function.
3. Structural Inspection
Structural inspections of the Bioretention Area shall include the following:
a. Inspect for erosion at the device inlet and outlet. Identify any deficiencies with
the installed method of stabilization to include displacement of mulch, matting,
sod, riprap, or geotextile fabric.
b. Inspect for erosion along the wetland perimeter slopes. Inspect perimeter slopes
for cracking or settling, slope stability, ground cover, the presence of undesirable
or nuisance vegetation.
Pagel of 3
c. Inspect outlet sructures, including but not limited to, the riser, barrel, and
overflow spillway (if applicable) for general condition, deterioration, and proper
operation. Inspect structure for evidence of cracks or leakage in structure.
4. Maintenance and Repairs
Maintenance and repair activities shall include:
a. Repair eroded areas to include perimeter slopes and bed area immediately, re-seed
or apply sod mats as'necessary to maintain good vegetative cover. Mow
bioretention area perimeter cover to maintain maximum height of six (6) inches.
Remove unwanted, undesirable, or invasive herbaceous or woody vegetation.
b. Make repairs to contributing storm water collection system, inlets and outlets, and
outflow structure to maintain proper function.
c. Remove accumulated sediment, organic debris or cake layer, and other debris
from bioretention area. Area shall be regraded to design elevation. Remulch any
areas of missing or thinning mulch. Replace entire mulch layer at least once
every two (2) years.
NOTE: This may be necessary on a more frequent basis early on after
construction until such point as site is stabilized and sediment accumulation is
limited.
NOTE: Removed sediment from any device shall be disposed of in an
appropriate manner (in accordance with local, state, and federal regulations)
and shall be handled in a manner that will not adversely impact water quality.
d. Bioretention area plant densities and species shall be maintained and re-planted in
bare areas as needed. Replant as described in construction drawings. Fertilization
should be kept to a minimum. Treat all diseased trees and shrubs. Remove and
replace all those beyond reasonable treatment. Replace vegetation support stakes
and wires as needed to maintain stability and desired aesthetic.
e. Water newly planted species at a rate of not less than 1-inch per week (including
rainfall) for a period of 90 days after planting. Water entire bioretention area as
necessary during periods of drought to ensure plant health and vegetation density.
It shall be the responsibility of the Owner to schedule the repair of any deficiencies noted
during an inspection.
Permanent access to the Bioretention Area will be granted to NCDENR - Division of
Water Quality (DWQ) by the Owner for the purpose of inspection and/or maintenance.
It will be the responsibility of the Owner to secure the appropriate agreements with
Future Owners should the property be sold. Inspections and maintenance (routine or
otherwise) and their scheduling will be the responsibility of the new Owner upon
completion of sale.
Page 2 of 3
ACKNOWLEDGEMENT:
I acknowledge and agree by my signature below that I am responsible for the
performance of the above listed inspection and maintenance procedures. I agree to notify
NCDENR - DWQ of any problems, other that routine maintenance, with the system prior
to any changes to the system or responsible party.
Print Name: bdAnT-zi 1-U.
Title: ©wtjI Q
Address: 4.x-7 S. --
Phone:

72
Signature:
Date: ?J
I, 4&MA- 94004:RZ S , a Notary Public for the State of North Carolina,
County of WJ47K , do hereby certify that 41t777?j ?. B &Vle/r- I-llp
Personally appeared before me this day of and
acknowledged the due execution of the forgoing wetland detention maintenance
requirements. Witness my hand and official seal, 'p,??p"?%
N O T A
L I C ,'•
My commission expires /1-a 6e S?' 1JPfT'q
Page 3 of 3
OPERATION AND MAINTENANCE PLAN (O& AI)
FOR
BIORETENTION AREA
STORM WATER TREATMENT DEVICE
LOT NO. 2-
This is the proposed Operation and Maintenance (O&M) Plan for the Bioretention Area
(Storm Water Treatment Device) on Lot No. 2. at the Pace Street Subdivision in
Raleigh, NC.
1. Inspection Frequency
The treatment device shall be inspected on a monthly basis and after every significant
runoff producing rainfall event (roughly 1.0 inches of rainfall within a 24-hour period).
2. General Inspection
General inspection activities for the Bioretention Area shall include:
a. Inspection for trash accumulation, condition of vegetative cover including plant
material (trees and shrubs), organic/mulch surface layer, and general device
condition. Litter and debris shall be removed from Bioretention Area.
b. Check and clear any obstructions such that the outlet structure (riser and/or
overflow spillway) functions as intended by the design.
c. Inspect contributing storm water collection system (ie. drains, piping, swales,
riprap, etc.) for condition and proper function.
3. Structural Inspection
Structural inspections of the Bioretention Area shall include the following:
a. Inspect for erosion at the device inlet and outlet. Identify any deficiencies with
the installed method of stabilization to include displacement of mulch, matting,
sod, riprap, or geotextile fabric.
b. Inspect for erosion along the wetland perimeter slopes. Inspect perimeter slopes
for cracking or settling, slope stability, ground cover, the presence of undesirable
or nuisance vegetation.
Pagel of 3
c. Inspect outlet sructures, including but not limited to, the riser, barrel, and
overflow spillway (if applicable) for general condition, deterioration, and proper
operation. Inspect structure for evidence of cracks or leakage in structure.
4. Maintenance and Repairs
Maintenance and repair activities shall include:
a. Repair eroded areas to include perimeter slopes and bed area immediately, re-seed
or apply sod mats as necessary to maintain good vegetative cover. Mow
bioretention area perimeter cover to maintain maximum height of six (6) inches.
Remove unwanted, undesirable, or invasive herbaceous or woody vegetation.
b. Make repairs to contributing storm water collection system, inlets and outlets, and
outflow structure to maintain proper function.
c. Remove accumulated sediment, organic debris or cake layer, and other debris
from bioretention area. Area shall be regraded to design elevation. Remulch any
areas of missing or thinning mulch. Replace entire mulch layer at least once
every two (2) years.
NOTE: This may be necessary on a more frequent basis early on after
construction until such point as site is stabilized and sediment accumulation is
limited.
NOTE: Removed sediment from any device shall be disposed of in an
appropriate manner (in accordance with local, state, and federal regulations)
and shall be handled in a manner that will not adversely impact water quality.
d. Bioretention area plant densities and species shall be maintained and re-planted in
bare areas as needed. Replant as described in construction drawings. Fertilization
should be kept to a minimum. Treat all diseased trees and shrubs. Remove and
replace all those beyond reasonable treatment. Replace vegetation support stakes
and wires as needed to maintain stability and desired aesthetic.
e. Water newly planted species at a rate of not less than 1-inch per week (including
rainfall) for a period of 90 days after planting. Water entire bioretention area as
necessary during periods of drought to ensure plant health and vegetation density.
It shall be the responsibility of the Owner to schedule the repair of any deficiencies noted
during an inspection.
Permanent access to the Bioretention Area will be granted to NCDENR - Division of
Water Quality (DWQ) by the Owner for the purpose of inspection and/or maintenance.
It will be the responsibility of the Owner to secure the appropriate agreements with
Future Owners should the property be sold. Inspections and maintenance (routine or
otherwise) and their scheduling will be the responsibility of the new Owner upon
completion of sale.
Page 2 of 3
ACKNOWLEDGEMENT:
I acknowledge and agree by my signature below that I am responsible for the
performance of the above listed inspection and maintenance procedures. I agree to notify
NCDENR - DWQ of any problems, other that routine maintenance, with the system prior
to any changes to the system or responsible party.
Print Name: MAI-I U. Title: ©W?J?1?

Address:
Phone:
Signature:
.7Z
I, 4 & L4- & LA?-2? a Notary Public for the State of North Carolina,
County of wJ?K ?. , do hereby certify that /V t7-tH C j A &,q7V 4tJS fI i-P
Personally appeared before me this day of /R and
acknowledged the due execution of the forgoing wetland detention maintenance
requirements. Witness my hand and official seal,
My commission expires /Iy4a ?7: l Cf', lr'
>J.• ARY'.
• SEA \C)
PUB\'
Page 3 of 3
I
OPERATION AND MAINTENANCE PLAN (O&AI)
FOR
BIORETENTION AREA
STORM WATER TREATMENT DEVICE
LOT NO. ?
This is the proposed Operation and Maintenance (0&M) Plan for the Bioretention Area
(Storm Water Treatment Device) on Lot No. _? at the Pace Street Subdivision in
Raleigh, NC.
1. Inspection Frequency
The treatment device shall be inspected on a monthly basis and after every significant
runoff producing rainfall event (roughly 1.0 inches of rainfall within a 24-hour period).
2. General Inspection
General inspection activities for the Bioretention Area shall include:
a. Inspection for trash accumulation, condition of vegetative cover including plant
material (trees and shrubs), organic/mulch surface layer, and general device
condition. Litter and debris shall be removed from Bioretention Area.
b. Check and clear any obstructions such that the outlet structure (riser and/or
overflow spillway) functions as intended by the design.
c. Inspect contributing storm water collection system (ie. drains, piping, swales,
riprap, etc.) for condition and proper function.
3. Structural Inspection
Structural inspections of the Bioretention Area shall include the following:
a. Inspect for erosion at the device inlet and outlet. Identify any deficiencies with
the installed method of stabilization to include displacement of mulch, matting,
sod, riprap, or geotextile fabric.
b. Inspect for erosion along the wetland perimeter slopes. Inspect perimeter slopes
for cracking or settling, slope stability, ground cover, the presence of undesirable
or nuisance vegetation.
Page 1 of 3
c. Inspect outlet sructures, including but not limited to, the riser, barrel, and
overflow spillway (if applicable) for general condition, deterioration, and proper
operation. Inspect structure for evidence of cracks or leakage in structure.
4. Maintenance and Repairs
Maintenance and repair activities shall include:
a. Repair eroded areas to include perimeter slopes and bed area immediately, re-seed
or apply sod mats as necessary to maintain good vegetative cover. Mow
bioretention area perimeter cover to maintain maximum height of six (6) inches.
Remove unwanted, undesirable, or invasive herbaceous or woody vegetation.
b. Make repairs to contributing storm water collection system, inlets and outlets, and
outflow structure to maintain proper function.
c. Remove accumulated sediment, organic debris or cake layer, and other debris
from bioretention area. Area shall be regraded to design elevation. Remulch any
areas of missing or thinning mulch. Replace entire mulch layer at least once
every two (2) years.
NOTE: This may be necessary on a more frequent basis early on after
construction until such point as site is stabilized and sediment accumulation is
limited.
NOTE: Removed sediment from any device shall be disposed of in an
appropriate manner (in accordance with local, state, and federal regulations)
and shall be handled in a manner that will not adversely impact water quality.
d. Bioretention area plant densities and species shall be maintained and re-planted in
bare areas as needed. Replant as described in construction drawings. Fertilization
should be kept to a minimum. Treat all diseased trees and shrubs. Remove and
replace all those beyond reasonable treatment. Replace vegetation support stakes
and wires as needed to maintain stability and desired aesthetic.
e. Water newly planted species at a rate of not less than 1-inch per week (including
rainfall) for a period of 90 days after planting. Water entire bioretention area as
necessary during periods of drought to ensure plant health and vegetation density.
It shall be the responsibility of the Owner to schedule the repair of any deficiencies noted
during an inspection.
Permanent access to the Bioretention Area will be granted to NCDENR - Division of
Water Quality (DWQ) by the Owner for the purpose of inspection and/or maintenance.
It will be the responsibility of the Owner to secure the appropriate agreements with
Future Owners should the property be sold. Inspections and maintenance (routine or
otherwise) and their scheduling will be the responsibility of the new Owner upon
completion of sale.
Page 2 of 3
ACKNOWLEDGEMENT:
I acknowledge and agree by my signature below that I am responsible for the
performance of the above listed inspection and maintenance procedures. I agree to notify
NCDENR - DWQ of any problems, other that routine maintenance, with the system prior
to any changes to the system or responsible party.
Print Name: bdA-f :M, ? ?1Y ? - j }?
Title: (f P
V??Q
Address:
'7
6 L?oMt. _oFptc Nlobtt,.lt.
Phone: 1'q ?zKC1 I co S 2? 61m -15117Z
Signature:
Date:
I, z4WR-'4- gioO 4-?O!5 -, a Notary Public for the State of North Carolina,
County of W1 do hereby certify that /RL77'/? Ey() !5? SL 1410 eW -5+1P
Personally appeared before me this day of /74 a and
acknowledged the due execution of the forgoing wetland detention maintenance
requirements. Witness my hand and official seal, ????•?```0 EDr?Wq%
`
NOTARY N

My commission expires /IV 464 ST Z
?nniuniu
Page 3 of 3
o c'P - coq %
OPERATION AND MAINTENANCE PLAN (O&M)
FOR
BIORETENTION AREA
STORM WATER TREATMENT DEVIC MAy 2 Zpo6
LOT NO. v ros ?osT vA rFJa'L;ti,
This is the proposed Operation and Maintenance (0&M) Plan for the Bioretention Area
(Storm Water Treatment Device) on Lot No. _L at the Pace Street Subdivision in
Raleigh, NC.
1. Inspection Frequency
The treatment device shall be inspected on a monthly basis and after every significant
runoff producing rainfall event (roughly 1.0 inches of rainfall within a 24-hour period).
2. General Inspection
General inspection activities for the Bioretention Area shall include:
a. Inspection for trash accumulation, condition of vegetative cover including plant
material (trees and shrubs), organic/mulch surface layer, and general device
condition. Litter and debris shall be removed from Bioretention Area.
b. Check and clear any obstructions such that the outlet structure (riser and/or
overflow spillway) functions as intended by the design.
c. Inspect contributing storm water collection system (ie. drains, piping, swales,
riprap, etc.) for condition and proper function.
3. Structural Inspection
Structural inspections of the Bioretention Area shall include the following:
a. Inspect for erosion at the device inlet and outlet. Identify any deficiencies with
the installed method of stabilization to include displacement of mulch, matting,
sod, riprap, or geotextile fabric.
b. Inspect for erosion along the wetland perimeter slopes. Inspect perimeter slopes
for cracking or settling, slope stability, ground cover, the presence of undesirable
or nuisance vegetation.
Pagel of 3
c. Inspect outlet sructures, including but not limited to, the riser, barrel, and
overflow spillway (if applicable) for general condition, deterioration, and proper
operation. Inspect structure for evidence of cracks or leakage in structure.
4. Maintenance and Repairs
Maintenance and repair activities shall include:
a. Repair eroded areas to include perimeter slopes and bed area immediately, re-seed
or apply sod mats as-necessary to maintain good vegetative cover. Mow
bioretention area perimeter cover to maintain maximum height of six (6) inches.
Remove unwanted, undesirable, or invasive herbaceous or woody vegetation.
b. Make repairs to contributing storm water collection system, inlets and outlets, and
outflow structure to maintain proper function.
c. Remove accumulated sediment, organic debris or cake layer, and other debris
from bioretention area. Area shall be regraded to design elevation. Remulch any
areas of missing or thinning mulch. Replace entire mulch layer at least once
every two (2) years.
NOTE: This may be necessary on a more frequent basis early on after
construction until such point as site is stabilized and sediment accumulation is
limited.
NOTE: Removed sediment from any device shall be disposed of in an
appropriate manner (in accordance with local, state, and federal regulations)
and shall be handled in a manner that will not adversely impact water quality.
d. Bioretention area plant densities and species shall be maintained and re-planted in
bare areas as needed. Replant as described in construction drawings. Fertilization
should be kept to a minimum. Treat all diseased trees and shrubs. Remove and
replace all those beyond reasonable treatment. Replace vegetation support stakes
and wires as needed to maintain stability and desired aesthetic.
e. Water newly planted species at a rate of not less than 1-inch per week (including
rainfall) for a period of 90 days after planting. Water entire bioretention area as
necessary during periods of drought to ensure plant health and vegetation density.
It shall be the responsibility of the Owner to schedule the repair of any deficiencies noted
during an inspection.
Permanent access to the Bioretention Area will be granted to NCDENR - Division of
Water Quality (DWQ) by the Owner for the purpose of inspection and/or maintenance.
It will be the responsibility of the Owner to secure the appropriate agreements with
Future Owners should the property be sold. Inspections and maintenance (routine or
otherwise) and their scheduling will be the responsibility of the new Owner upon
completion of sale.
Page 2 of 3
ACKNOWLEDGEMENT:
I acknowledge and agree by my signature below that I am responsible for the
performance of the above listed inspection and maintenance procedures. I agree to notify
NCDENR - DWQ of any problems, other that routine maintenance, with the system prior
to any changes to the system or responsible party.
Print Name: MA7 - v. Title: (f:)Wt !?Q

Address:
Phone:
Signature:
72
I, 4jgYAR-& , a Notary Public for the State of North Carolina,
County of W)4-k E , do hereby certify that kltZZI-1-? r , &-AnyeiA&I P
Personally appeared before me this day of and
acknowledged the due execution of the forgoing wetland detention maintenance
requirements. Witness my hand and official seal,
C?Cw? wG?u?
My commission expires /I-U461S2 l ? y'
cc.
5: 0
WAKeG? N
'??nurrmn?qu"``
Page 3 of 3

OPERATION AND MAINTENANCE PLAN (O&NI)
FOR
BIORETENTION AREA
STORM WATER TREATMENT DEVICE
LOT NO. 2-
This is the proposed Operation and Maintenance (0&M) Plan for the Bioretention Area
(Storm Water Treatment Device) on Lot No. 2 at the Pace Street Subdivision in
Raleigh, NC.
1. Inspection Frequency
The treatment device shall be inspected on a monthly basis and after every significant
runoff producing rainfall event (roughly 1.0 inches of rainfall within a 24-hour period).
2. General Inspection
General inspection activities for the Bioretention Area shall include:
a. Inspection for trash accumulation, condition of vegetative cover including plant
material (trees and shrubs), organic/mulch surface layer, and general device
condition. Litter and debris shall be removed from Bioretention Area.
b. Check and clear any obstructions such that the outlet structure (riser and/or
overflow spillway) functions as intended by the design.
c. Inspect contributing storm water collection system (ie. drains, piping, swales,
riprap, etc.) for condition and proper function.
3. Structural Inspection
Structural inspections of the Bioretention Area shall include the following:
a. Inspect for erosion at the device inlet and outlet. Identify any deficiencies with
the installed method of stabilization to include displacement of mulch, matting,
sod, riprap, or geotextile fabric.
b. Inspect for erosion along the wetland perimeter slopes. Inspect perimeter slopes
for cracking or settling, slope stability, ground cover, the presence of undesirable
or nuisance vegetation.
Page 1 of 3
c. Inspect outlet sructures, including but not limited to, the riser, barrel, and
overflow spillway (if applicable) for general condition, deterioration, and proper
operation. Inspect structure for evidence of cracks or leakage in structure.
4. Maintenance and Repairs
Maintenance and repair activities shall include:
a. Repair eroded areas to include perimeter slopes and bed area immediately, re-seed
or apply sod mats as necessary to maintain good vegetative cover. Mow
bioretention area perimeter cover to maintain maximum height of six (6) inches.
Remove unwanted, undesirable, or invasive herbaceous or woody vegetation.
b. Make repairs to contributing storm water collection system, inlets and outlets, and
outflow structure to maintain proper function.
c. Remove accumulated sediment, organic debris or cake layer, and other debris
from bioretention area. Area shall be regraded to design elevation. Remulch any
areas of missing or thinning mulch. Replace entire mulch layer at least once
every two (2) years.
NOTE: This may be necessary on a more frequent basis early on after
construction until such point as site is stabilized and sediment accumulation is
limited.
NOTE: Removed sediment from any device shall be disposed of in an
appropriate manner (in accordance with local, state, and federal regulations)
and shall be handled in a manner that will not adversely impact water quality.
d. Bioretention area plant densities and species shall be maintained and re-planted in
bare areas as needed. Replant as described in construction drawings. Fertilization
should be kept to a minimum. Treat all diseased trees and shrubs. Remove and
replace all those beyond reasonable treatment. Replace vegetation support stakes
and wires as needed to maintain stability and desired aesthetic.
e. Water newly planted species at a rate of not less than 1-inch per week (including
rainfall) for a period of 90 days after planting. Water entire bioretention area as
necessary during periods of drought to ensure plant health and vegetation density.
It shall be the responsibility of the Owner to schedule the repair of any deficiencies noted
during an inspection.
Permanent access to the Bioretention Area will be granted to NCDENR - Division of
Water Quality (DWQ) by the Owner for the purpose of inspection and/or maintenance.
It will be the responsibility of the Owner to secure the appropriate agreements with
Future Owners should the property be sold. Inspections and maintenance (routine or
otherwise) and their scheduling will be the responsibility of the new Owner upon
completion of sale.
Page 2 of 3
ACKNOWLEDGEMENT:
I acknowledge and agree by my signature below that I am responsible for the
performance of the above listed inspection and maintenance procedures. I agree to notify
NCDENR - DWQ of any problems, other that routine maintenance, with the system prior
to any changes to the system or responsible party.
Print Name:
Title: O
Address:' 5) o ? - - Nl $ati1 ? G - 2 7
uoMc? oF?t?- Mobtt.?
Phone: ?tl? la Z .2 l9 -D172
Signature: INVOW 7. ff" ` Date:
r4JAV1414 , a Notary Public for the State of North Carolina,
County of WA<tl:-:? , do hereby certify that P+77//-Y?17 E, ?44nl,?j,?,x?P
Personally appeared before me this j? day of M, 4V , and
acknowledged the due execution of the forgoing wetland detention maintenance
requirements. Witness my hand and official seal, tE tDrr{ y
o ?-
.?NOTA Ij
;tL.pUBLIG.?
My commission expires 7: .Z-6Vy' '%9 ,, •`V
/1111111111110
Page 3 of 3
OPERATION AND MAINTENANCE PLAN (O&AI)
FOR
BIORETENTION AREA
STORM WATER TREATMENT DEVICE
LOT NO.
This is the proposed Operation and Maintenance (O&M) Plan for the Bioretention Area
(Storm Water Treatment Device) on Lot No. _? at the Pace Street Subdivision in
Raleigh, NC.
1. Inspection Frequency
The treatment device shall be inspected on a monthly basis and after every significant
runoff producing rainfall event (roughly 1.0 inches of rainfall within a 24-hour period).
2. General Inspection
General inspection activities for the Bioretention Area shall include:
a. Inspection for trash accumulation, condition of vegetative cover including plant
material (trees and shrubs), organic/mulch surface layer, and general device
condition. Litter and debris shall be removed from Bioretention Area.
b. Check and clear any obstructions such that the outlet structure (riser and/or
overflow spillway) functions as intended by the design.
c. Inspect contributing storm water collection system (ie. drains, piping, swales,
riprap, etc.) for condition and proper function.
3. Structural Inspection
Structural inspections of the Bioretention Area shall include the following:
a. Inspect for erosion at the device inlet and outlet. Identify any deficiencies with
the installed method of stabilization to include displacement of mulch, matting,
sod, riprap, or geotextile fabric.
b. Inspect for erosion along the wetland perimeter slopes. Inspect perimeter slopes
for cracking or settling, slope stability, ground cover, the presence of undesirable
or nuisance vegetation.
Page I of 3
A c. Inspect outlet sructures, including but not limited to, the riser, barrel, and
overflow spillway (if applicable) for general condition, deterioration, and proper
operation. Inspect structure for evidence of cracks or leakage in structure.
4. Maintenance and Repairs
Maintenance and repair activities shall include:
a. Repair eroded areas to include perimeter slopes and bed area immediately, re-seed
or apply sod mats as necessary to maintain good vegetative cover. Mow
bioretention area perimeter cover to maintain maximum height of six (6) inches.
Remove unwanted, undesirable, or invasive herbaceous or woody vegetation.
b. Make repairs to contributing storm water collection system, inlets and outlets, and
outflow structure to maintain proper function.
c. Remove accumulated sediment, organic debris or cake layer, and other debris
from bioretention area. Area shall be regraded to design elevation. Remulch any
areas of missing or thinning mulch. Replace entire mulch layer at least once
every two (2) years.
NOTE: This may be necessary on a more frequent basis early on after
construction until such point as site is stabilized and sediment accumulation is
limited.
NOTE: Removed sediment from any device shall be disposed of in an
appropriate manner (in accordance with local, state, and federal regulations)
and shall be handled in a manner that will not adversely impact water quality.
d. Bioretention area plant densities and species shall be maintained and re-planted in
bare areas as needed. Replant as described in construction drawings. Fertilization
should be kept to a minimum. Treat all diseased trees and shrubs. Remove and
replace all those beyond reasonable treatment. Replace vegetation support stakes
and wires as needed to maintain stability and desired aesthetic.
e. Water newly planted species at a rate of not less than 1-inch per week (including
rainfall) for a period of 90 days after planting. Water entire bioretention area as
necessary during periods of drought to ensure plant health and vegetation density.
It shall be the responsibility of the Owner to schedule the repair of any deficiencies noted
during an inspection.
Permanent access to the Bioretention Area will be granted to NCDENR - Division of
Water Quality (DWQ) by the Owner for the purpose of inspection and/or maintenance.
It will be the responsibility of the Owner to secure the appropriate agreements with
Future Owners should the property be sold. Inspections and maintenance (routine or
otherwise) and their scheduling will be the responsibility of the new Owner upon
completion of sale.
Page 2 of 3
10
ACKNOWLEDGEMENT:
I acknowledge and agree by my signature below that I am responsible for the
performance of the above listed inspection and maintenance procedures. I agree to notify
NCDENR - DWQ of any problems, other that routine maintenance, with the system prior
to any changes to the system or responsible party.
Print Name: MAM- U a?,?)f-4? -1}>
Title: ©wt'jmQ
Address: 'E':)o-7 S. ? ST -- ,
Phone:
Signature:
..?Z
I, i4?0 W4-Rb j , a Notary Public for the State of North Carolina,
County of w1 , do hereby certify that /j1 77f-?540 15 . 19Z4n40IU!511/P
Personally appeared before me this day of and
acknowledged the due execution of the forgoing wetland detention mainte ce
requirements. Witness my hand and official seal,
4dWVI(--- fia6?
My commission expires 14G wy Sz: 1 ? ZzoF
01 P,
= g? G•
PSm'?AL ' Zs
ICoU?`\\
Page 3 of 3
d(p - ongg
OPERATION AND MAINTENANCE PLAN (O&VI)
FOR
BIORETENTION AREA
STORM WATER TREATMENT DEVICE
M AY ? 2006
LOT NO. oEN? _ wAYEK QUALIN
This is the proposed Operation and Maintenance (O&M) Plan for the Bioretention Area
(Storm Water Treatment Device) on Lot No. at the Pace Street Subdivision in
Raleigh, NC.
1. Inspection Frequency
The treatment device shall be inspected on a monthly basis and after every significant
runoff producing rainfall event (roughly 1.0 inches of rainfall within a 24-hour period).
2. General Inspection
General inspection activities for the Bioretention Area shall include:
a. Inspection for trash accumulation, condition of vegetative cover including plant
material (trees and shrubs), organic/mulch surface layer, and general device
condition. Litter and debris shall be removed from Bioretention Area.
b. Check and clear any obstructions such that the outlet structure (riser and/or
overflow spillway) functions as intended by the design.
c. Inspect contributing storm water collection system (ie. drains, piping, swales,
riprap, etc.) for condition and proper function.
3. Structural Inspection
Structural inspections of the Bioretention Area shall include the following:
a. Inspect for erosion at the device inlet and outlet. Identify any deficiencies with
the installed method of stabilization to include displacement of mulch, matting,
sod, riprap, or geotextile fabric.
b. Inspect for erosion along the wetland perimeter slopes. Inspect perimeter slopes
for cracking or settling, slope stability, ground cover, the presence of undesirable
or nuisance vegetation.
Page 1 of 3
c. Inspect outlet sructures, including but not limited to, the riser, barrel, and
overflow spillway (if applicable) for general condition, deterioration, and proper
operation. Inspect structure for evidence of cracks or leakage in structure.
4. Maintenance and Repairs
Maintenance and repair activities shall include:
a. Repair eroded areas to include perimeter slopes and bed area immediately, re-seed
or apply sod mats as'necessary to maintain good vegetative cover. Mow
bioretention area perimeter cover to maintain maximum height of six (6) inches.
Remove unwanted, undesirable, or invasive herbaceous or woody vegetation.
b. Make repairs to contributing storm water collection system, inlets and outlets, and
outflow structure to maintain proper function.
c. Remove accumulated sediment, organic debris or cake layer, and other debris
from bioretention area. Area shall be regraded to design elevation. Remulch any
areas of missing or thinning mulch. Replace entire mulch layer at least once
every two (2) years.
NOTE: This may be necessary on a more frequent basis early on after
construction until such point as site is stabilized and sediment accumulation is
limited.
NOTE: Removed sediment from any device shall be disposed of in an
appropriate manner (in accordance with local, state, and federal regulations)
and shall be handled in a manner that will not adversely impact water quality.
d. Bioretention area plant densities and species shall be maintained and re-planted in
bare areas as needed. Replant as described in construction drawings. Fertilization
should be kept to a minimum. Treat all diseased trees and shrubs. Remove and
replace all those beyond reasonable treatment. Replace vegetation support stakes
and wires as needed to maintain stability and desired aesthetic.
e. Water newly planted species at a rate of not less than 1-inch per week (including
rainfall) for a period of 90 days after planting. Water entire bioretention area as
necessary during periods of drought to ensure plant health and vegetation density.
It shall be the responsibility of the Owner to schedule the repair of any deficiencies noted
during an inspection.
Permanent access to the Bioretention Area will be granted to NCDENR - Division of
Water Quality (DWQ) by the Owner for the purpose of inspection and/or maintenance.
It will be the responsibility of the Owner to secure the appropriate agreements with
Future Owners should the property be sold. Inspections and maintenance (routine or
otherwise) and their scheduling will be the responsibility of the new Owner upon
completion of sale.
Page 2 of 3
ACKNOWLEDGEMENT:
I acknowledge and agree by my signature below that I am responsible for the
performance of the above listed inspection and maintenance procedures. I agree to notify
NCDENR - DWQ of any problems, other that routine maintenance, with the system prior
to any changes to the system or responsible party.
Print Name: tvjA-"r'TV .l„4
Title: OV??J?Q
Address: 5'o-7 S, -• l? _L?dh1 1?G - 2
Phone:
Signature:
?Z
aNotary Public for the State of North Carolina,
County of ?/()ZEK ?. , do hereby certify that 10,f 77y E-gJ F- P
Personally appeared before me this day of / Y l a , .204? and
acknowledged the due execution of the forgoing wetland detention maintenance
requirements. Witness my hand and official seal,

My commission expires 1'9V 461 S7:
'. ,q4AR
Page 3 of 3

OPERATION AND MAINTENANCE PLAN (O&IVI)
FOR
BIORETENTION AREA
STORM WATER TREATMENT DEVICE
LOT NO. f
This is the proposed Operation and Maintenance (O&M) Plan for the Bioretention Area
(Storm Water Treatment Device) on Lot No. 2. at the Pace Street Subdivision in
Raleigh, NC.
1. Inspection Frequency
The treatment device shall be inspected on a monthly basis and after every significant
runoff producing rainfall event (roughly 1.0 inches of rainfall within a 24-hour period).
2. General Inspection
General inspection activities for the Bioretention Area shall include:
a. Inspection for trash accumulation, condition of vegetative cover including plant
material (trees and shrubs), organic/mulch surface layer, and general device
condition. Litter and debris shall be removed from Bioretention Area.
b. Check and clear any obstructions such that the outlet structure (riser and/or
overflow spillway) functions as intended by the design.
c. Inspect contributing storm water collection system (ie. drains, piping, swales,
riprap, etc.) for condition and proper function.
3. Structural Inspection
Structural inspections of the Bioretention Area shall include the following:
a. Inspect for erosion at the device inlet and outlet. Identify any deficiencies with
the installed method of stabilization to include displacement of mulch, matting,
sod, riprap, or geotextile fabric.
b. Inspect for erosion along the wetland perimeter slopes. Inspect perimeter slopes
for cracking or settling, slope stability, ground cover, the presence of undesirable
or nuisance vegetation.
Pagel of 3
c. Inspect outlet sructures, including but not limited to, the riser, barrel, and
overflow spillway (if applicable) for general condition, deterioration, and proper
operation. Inspect structure for evidence of cracks or leakage in structure.
4. Maintenance and Repairs
Maintenance and repair activities shall include:
a. Repair eroded areas to include perimeter slopes and bed area immediately, re-seed
or apply sod mats as necessary to maintain good vegetative cover. Mow
bioretention area perimeter cover to maintain maximum height of six (6) inches.
Remove unwanted, undesirable, or invasive herbaceous or woody vegetation.
b. Make repairs to contributing storm water collection system, inlets and outlets, and
outflow structure to maintain proper function.
c. Remove accumulated sediment, organic debris or cake layer, and other debris
from bioretention area. Area shall be regraded to design elevation. Remulch any
areas of missing or thinning mulch. Replace entire mulch layer at least once
every two (2) years.
NOTE: This may be necessary on a more frequent basis early on after
construction until such point as site is stabilized and sediment accumulation is
limited.
NOTE: Removed sediment from any device shall be disposed of in an
appropriate manner (in accordance with local, state, and federal regulations)
and shall be handled in a manner that will not adversely impact water quality.
d. Bioretention area plant densities and species shall be maintained and re-planted in
bare areas as needed. Replant as described in construction drawings. Fertilization
should be kept to a minimum. Treat all diseased trees and shrubs. Remove and
replace all those beyond reasonable treatment. Replace vegetation support stakes
and wires as needed to maintain stability and desired aesthetic.
e. Water newly planted species at a rate of not less than 1-inch per week (including
rainfall) for a period of 90 days after planting. Water entire bioretention area as
necessary during periods of drought to ensure plant health and vegetation density.
It shall be the responsibility of the Owner to schedule the repair of any deficiencies noted
during an inspection.
Permanent access to the B ioretentionArea will be granted to NCDENR - Division of
Water Quality (DWQ) by the Owner for the purpose of inspection and/or maintenance.
It will be the responsibility of the Owner to secure the appropriate agreements with
Future Owners should the property be sold. Inspections and maintenance (routine or
otherwise) and their scheduling will be the responsibility of the new Owner upon
completion of sale.
Page 2 of 3
ACKNOWLEDGEMENT:
I acknowledge and agree by my signature below that I am responsible for the
performance of the above listed inspection and maintenance procedures. I agree to notify
NCDENR - DWQ of any problems, other that routine maintenance, with the system prior
to any changes to the system or responsible party.
Print Name: N/(A-rV , 'F,4 ?11L1 a.)
Title: (fPWt4t-='F?,
Address: 1---,o-7 S, -T- -
Phone:
Signature:
72
I, OM::g L!5 , a Notary Public for the State of North Carolina,
County of k))4-1< , do hereby certify that
Personally appeared before me this day of IRA V and
acknowledged the due execution of the forgoing wetland detention maintenance
requirements. Witness my hand and official seal,
My commission expires Z?Ivy'
o``? ``P• D' W A R c S
JQ'• Y
R
01
P
"1111111111 o" \
Page 3 of 3
' OPERATION AND MAINTENANCE PLAN (O&NI)
FOR
BIORETENTION AREA
STORM WATER TREATMENT DEVICE
LOT NO.
This is the proposed Operation and Maintenance (O&M) Plan for the Bioretention Area
(Storm Water Treatment Device) on Lot No. _? at the Pace Street Subdivision in
Raleigh, NC.
1. Inspection Frequency
The treatment device shall be inspected on a monthly basis and after every significant
runoff producing rainfall event (roughly 1.0 inches of rainfall within a 24-hour period).
2. General Inspection
General inspection activities for the Bioretention Area shall include:
a. Inspection for trash accumulation, condition of vegetative cover including plant
material (trees and shrubs), organic/mulch surface layer, and general device
condition. Litter and debris shall be removed from Bioretention Area.
b. Check and clear any obstructions such that the outlet structure (riser and/or
overflow spillway) functions as intended by the design.
c. Inspect contributing storm water collection system (ie. drains, piping, swales,
riprap, etc.) for condition and proper function.
3. Structural Inspection
Structural inspections of the Bioretention Area shall include the following:
a. Inspect for erosion at the device inlet and outlet. Identify any deficiencies with
the installed method of stabilization to include displacement of mulch, matting,
sod, riprap, or geotextile fabric.
b. Inspect for erosion along the wetland perimeter slopes. Inspect perimeter slopes
for cracking or settling, slope stability, ground cover, the presence of undesirable
or nuisance vegetation.
Pagel of 3
r c. Inspect outlet sructures, including but not limited to, the riser, barrel, and
overflow spillway (if applicable) for general condition, deterioration, and proper
operation. Inspect structure for evidence of cracks or leakage in structure.
4. Maintenance and Repairs
Maintenance and repair activities shall include:
a. Repair eroded areas to include perimeter slopes and bed area immediately, re-seed
or apply sod mats as necessary to maintain good vegetative cover. Mow
bioretention area perimeter cover to maintain maximum height of six (6) inches.
Remove unwanted, undesirable, or invasive herbaceous or woody vegetation.
b. Make repairs to contributing storm water collection system, inlets and outlets, and
outflow structure to maintain proper function.
c. Remove accumulated sediment, organic debris or cake layer, and other debris
from bioretention area. Area shall be regraded to design elevation. Remulch any
areas of missing or thinning mulch. Replace entire mulch layer at least once
every two (2) years.
NOTE: This may be necessary on a more frequent basis early on after
construction until such point as site is stabilized and sediment accumulation is
limited.
NOTE: Removed sediment from any device shall be disposed of in an
appropriate manner (in accordance with local, state, and federal regulations)
and shall be handled in a manner that will not adversely impact water quality.
d. Bioretention area plant densities and species shall be maintained and re-planted in
bare areas as needed. Replant as described in construction drawings. Fertilization
should be kept to a minimum. Treat all diseased trees and shrubs. Remove and
replace all those beyond reasonable treatment. Replace vegetation support stakes
and wires as needed to maintain stability and desired aesthetic.
e. Water newly planted species at a rate of not less than 1-inch per week (including
rainfall) for a period of 90 days after planting. Water entire bioretention area as
necessary during periods of drought to ensure plant health and vegetation density.
It shall be the responsibility of the Owner to schedule the repair of any deficiencies noted
during an inspection.
Permanent access to the Bioretention Area will be granted to NCDENR - Division of
Water Quality (DWQ) by the Owner for the purpose of inspection and/or maintenance.
It will be the responsibility of the Owner to secure the appropriate agreements with
Future Owners should the property be sold. Inspections and maintenance (routine or
otherwise) and their scheduling will be the responsibility of the new Owner upon
completion of sale.
Page 2 of 3
ACKNOWLEDGEMENT:
I acknowledge and agree by my signature below that I am responsible for the
performance of the above listed inspection and maintenance procedures. I agree to notify
NCDENR - DWQ of any problems, other that routine maintenance, with the system prior
to any changes to the system or responsible party.
Print Name: h/(A- U. Title: O V?/r.J?Q

Address:

Phone: (411ci?? r? { ,(? la)8Z?1- 2 ?(R1q?41?--?!?Z
Signature:
Date:
I, z4WR-'4- "-ter-wy'r' ,&5 "a Notary Public for the State of North Carolina,
County of w)4-J<E , do hereby certify that M&7 1'giO o ? 1C1ALW1P
Personally appeared before me this Nli day of and
acknowledged the due execution of the forgoing wetland detention maintenance
requirements. Witness my hand and official seal,
\`?p?U?UUUrrrrrq?i
01 `J?PEDWA,q?? ??'
PRY•
My commission expires f}'Lf C,(,l s? l7•? P?U B LAG • V
Page 3 of 3
Pace St - Matt Blankenship - S&EC project
Subject: Pace St - Matt Blankenship - S&EC project
From: Ian McMillan <[e-mail]>
Date: Thu, 20 Apr 2006 11:27:00 -0400
To: Amy Chapman <[e-mail]>
Please be sure to condition this one to request final bio-retention plans within 60
days of issuance of buffer approval. Thanks, Ian
M.H
6?-t'S t l>1 1?2k ?Zr {JcJ'r
???J'1 l r. ? 'L 6 CP
C?
1 of 1 4/20/2006 11:34 AM
LA uto - C) C) Ct 00
• _
Soil & Environmental Consul:ta-nts,PA
11010 Raven Ridge Road • Raleigh, North Carolina 27614 • Phone: (919) 846=5900` .i• Fax: (919)8'4 ! 467
www.SandEC.com
'r?AK ? :? 2006
Transmittal
To: 0i ?Cara? U Project q, Ll O.b l Date: ?" 2 ?'' Ulo
We, tbEN R - -r?Lj Q Project Name:
V l
23 2 l C talol-r?G ?Jl vG?
We Transmit to you Herewith:
4
File:
? Drawings ? For your information and files
? Specifications For comment or approval
? Brochures or photos Returned for correction, resubmit
? Correspondence ? Approved as noted
? As per your request
/ 411
I '?
No. Copies Document No. Date Description

2 x-28-0?
t?t orsFev, ?-1 u,) Lvov . -eiS
.. Pre, . Sire ??

Remarks:
If enclosures afe not as listed as above, kindly notify us at once.
By: r-f J6 ou- Y, e.
Under Separate Cover:
? By mail
? By courier
? • By express
d`

lyced
Charlotte Office:
236 LePhillip Court, Suite C
Concord, NC 28025
Phone: [phone]
F-Y• O(Uu 7?0_q.1n6

i (s
`.....,..oww, i`il. Ll4JJ
Phone:; [phone]
Fax: [phone]
Soil & Environmental Consultants, PA
11010 Raven Ridge Road • Raleigh, North Carolina 27614 • Phone: [phone] • Fax: [phone]
www.SandEC.com
March 28, 2006
S&EC Project No. 9840.1) 1
Ms. Cindy Karoly
NCDENR - DWQ
Parkview Building
2321 Crabtree Boulevard
Raleigh, NC 27604

1?1?? R??" l1Y .•?H
Reference: Pace Street Subdivision
REVISED Bioretention Area Design - Requested Modifications
DWQ# 06-0098
Dear Ms. Karoly:
The purpose of this letter is to formally submit modifications to our previously submitted
Preliminary Design Calculations & Concept Plan for a series of bioretention areas on the
above reference project in Wake County, NC. The enclosed data and information
provides an updated description of the proposed sizing modifications for site storm water
features.
If you will recall, on January 27, 2006 in a letter from your office, additional information
was requested regarding a series of three (3) previously proposed storm water
bioretention areas, including one on each of the three lots which comprise the Pace Street
Subdivision. Since receipt of your letter we have discussed the project with Mr. Ian
McMillan and Mr. Sam Aghimien of your office on various occasions to seek guidance
regarding potential modifications to our Concept Plan. Based on these discussions it is
our understanding that our proposed modifications (discussed herein) will provide DWQ
with sufficient information to make a decision regarding the approval of our client's
requested buffer impacts.
Based on input from your office and a review of site conditions (including numerous site
constraints) we have modified our plan such that a minimum Required Cell Area of 200
square feet is achieved on each of the three proposed bioretention areas.
Page 1 of 2
Pace Street Subdivision - Modifications Request Letter March 28, 2006
Soil & Environmental Consultants, PA Project No. 9840.D1
The following table includes the proposed modified summary of our preliminary design
results:
Required Recommended
Lot # / Drainage Area Weighted Bioretention Construction
Cell # sq. ft. (ac.) Rational
Coefficient Cell Area Area
(sq. ft.) (sq. ft.)
1 5,675 (0.12) 0.72 285 428
2 3,998 (0.092) 0.69 200 300
3 3,277 (0.08) 0.71 200 300
For planning purposes we have recommended that the Owner consider a total
construction area of 1.5 times the design surface area footprint required for the proposed
bioretention areas. This area is reflected in the table above.
The proposed bioretention areas will be integrated into the site landscaping plan to
provide the desired appearance. We have attached copies of the REVISED DWQ
Worksheet for each of the proposed bioretention areas for the proposed site development.
Also please find a REVISED Preliminary Site Plan reflected the proposed site conditions
including the size and location of the three bioretention areas. The remainder of our
design as described in our Preliminary Design Calculations & Concept Plan remains
unchanged.
Please review the enclosed documents and provide and comments or further questions at
your earliest opportunity. We appreciate your consideration on this modification request.
Sincerely,
SOIL & ENVIROMEN`To'O' gf3&TANTS, PA
?FAL
Patrick K. S- p 25525 Z
N.C. License No. 25A5,fl s-2?-o o
RJ: `? ?i ?? . ae
Attachments: ?`ap?`r e 4 ?»iea?
1. REVISED DWQ - Bioretention Worksheets, 3 each
2. REVISED Preliminary Site Plan - Figure 5
Cc: Mr. Matt Blankinship
Mr. Jason Payne
Page 2 of 2
DWQ Project No.
DIVISION OF WATER QUALITY - BIORETENTION AREA WORKSHEET
1. PROJECT INFORPkTION (please complete the following information):
Project Name : ace- e.2 -3 Af, Contact Person: aEETeb? ') F" Phone Number. (919) 0 65
For projects with multiple basins, specify which basin this worksheet applies to: kof- j
Permanent Pool Elevation -roD ft. (elevation of the orifice invert out)
Temporary Pool Elevation Tp. P ft. (elevation of the outlet structure invert in)
Sioretention Surface Area 2RS sq. ft.
Drainage Area /??. j 3 ac. (on-site and off-site drainage to the basin)
Impervious Area 0.09 ac. (on-site and off-site drainage to the basin)
Rational C Coefficient /?. 7'L [ ?,?, •, f f1G v?.F C
Size % -2 % (either 5% in w/sand under drain or 7% in w/o)
Inlet Velocity 'T]?D fps
Inlet flow depth -in
Depth to Ground Water ::ZF; Q ft.
Planting Soil Infiltration Rate Too? in./hr. (the soil layer down to 4 feet)
In-Situ Soil Infiltration Rate TO P in./hr. (the soil layer below 4 feet or below the sand bed)
II. REQUIRED ITEMS CHECKLIST
Initial in the space provided to indicate the following design requirements have been met and supporting documentation is attached. If a
requirement has not been met, attach an explanation of why. At a minimum, a complete stormwater management plan submittal includes
a worksheet for each BMP, design calculations, plans and specifications showing all BMPs and outlet structure details, a detailed
drainage plan and a fully executed operation and maintenance agreement. An incomplete submittal package will result in a request for
additional information and will substantially delay final review and approval of the project.
No vertical sand bed is proposed
The bioretention area is at least 40 feet by 15 feet.
Sheet flow is provided at inlet.
Water table depth is greater than 6 feet.
Minimum of 6" ponding is provided.
The ponded area will draw down in less than 4 days.
Planting soil infiltration rate is greater than 0.52 in/hr.
,The in-situ soil infiltration rate is greater than 0.2 in/hr.
A planting plan with species and densities is provided.
Mulch layer is specified in plans.
Planting soil meets minimum soil specifications (NCDENR Stormwater Best Management
Practices Manual, April 1999)
Plan details for the bioretention area provided.
Plan details for the inlet and outlet are provided.
An operation and maintenance agreement signed and notarized by the responsible party is provided.
Please note that underdrains beneath the planting soil are acceptable in the Piedmont and Mountains

DWQ Project
DIVISION OF WATER QUALITY - BIORETENTION AREA WORKSHEET
1. PROJECT INFOR TION (please comp) to the following information):
Project Name : PCI ?7 fi c ? v
Contact Person: ?2. - K1 C K ?r14 1 - Phone Number C - -/00 .
For projects with multiple basin s, specify which basin this Worksheet applies to:
Pool Elevation ft. (elevation of the orifice invert out)
Temporary Pool Elevation T I-2, D ft. (elevation of the outlet structure invert in)
Bioretention Surface Area __)nn- sq. It.
Drainage Area g , Qua ac. (on-site and off-site drainage to the basin)
Impervious Area ( ac. (on-site and off-site drainage to the basin)
Rational C Coefficient ( L""-,) A k 1 /a /4
._ c
I Ic
Size % % .
.
(either 5% in w/sand under drain or 7% in w/o)
Inlet Velocity > fps
Inlet flow depth in
Depth to Ground Water ft
Planting Soil Infiltration Rate T]?; t in./hr. (the soil layer down to 4 feet)
In-Situ Soil Infiltration Rate in./hr. (the soil layer below 4 feet or below the sand bed)
II. REQUIRED ITEMS CHECKLIST
Initial in the space provided to indicate the following design requirements have been met and supporting documentation is attached. If a
requirement has not been met, attach an explanation of why. At a minimum, a complete stormwater management plan submittal includes
a worksheet for each BMP, design calculations, plans and specifications showing all BMPs and outlet structure details, a detailed
drainage plan and a fully executed operation and maintenance agreement. An incomplete submittal package will result in a request for
additional information and will substantially delay final review and approval of the project.
No vertical sand bed is proposed
The bioretention area is at least 40 feet by 15 feet.
Sheet flow is provided at inlet.
Water table depth is greater than 6 feet.
Minimum of 6" ponding is provided.
The ponded area will draw down in less than 4 days.
Planting soil infiltration rate is greater than 0.52 in/hr.
The in-situ soil infiltration rate is greater than 0.2 in/hr.
A planting plan with species and densities is provided.
Mulch layer is specified in plans.
Planting soil meets minimum soil specifications (NCDENR Stormwater Best Management
Practices Manual, April 1999)
Plan details for the bioretention area provided.
Plan details for the inlet and outlet are provided.
.An operation and maintenance agreement signed and notarized by the responsible party is provided.
Please note that underdrains beneath the planting soil are acceptable in the Piedmont and Mountains
7 l t ?1rI d 1
l pj,,i y1, (ppG'? ?t, ? f, i L:? c..a ??'• ? j E_?'f,:?
DWQ Project No.
DIVISION OF WATER QUALITY - BIORETENTION AREA WORKSHEET
1. PROJECT INFOR ION (please complete the follo 'ng information):
Project Name : O J{ 2 .'.?
Contact Person: r i i, 1 Phone Number. o- qc?0 G
For projects with multiple basins, specify which basin this worksheet applies to: L--0+3
Permanent Pool Elevation -17"-1P ft. (elevation of the orifice invert out)
Temporary Pool Elevation 772- P ft. (elevation of the outlet structure invert in)
Bioretention Surface Area 130n sq. ft.
Drainage Area 6-09 ac.
Impervious Area / S ac.
Rational C Coefficient ?./
Size % ?- %
Inlet Velocity _ fps
Inlet flow depth in
Depth to Ground Water ` ft.
Planting Soil Infiltration Rate :aD in./hr,
In-Situ Soil Infiltration Rate ( in./hr.
(on-site and off-site drainage to the basin)
(on-site and off- ite drainage to the basin
tw[(' 9tr"? 0,A"".I L
(either 5% in w/sand under drain or 7% in w/o)
(the soil layer down to 4 feet)
(the soil layer below 4 feet or below the sand bed)
II. REQUIRED ITEMS CHECKLIST
Initial in the space provided to indicate the following design requirements have been met and supporting documentation is attached. If a
requirement has not been met, attach an explanation of why. At a minimum, a complete stormwater management plan submittal includes
a worksheet for each BMP, design calculations, plans and specifications showing all BMPs and outlet structure details, a detailed
drainage plan and a fully executed operation and maintenance agreement. An incomplete submittal package will result in a request for
additional information and will substantially delay final review and approval of the project.
Applicants Initials
l No vertical sand bed is proposed
The bioretention area is at least 40 feet by 15 feet.
Sheet flow is provided at inlet.
Water table depth is greater than 6 feet.
Minimum of 6" ponding is provided.
T__The ponded area will draw down in less than 4 days.
J ??D Planting soil infiltration rate is greater than 0.52 in/hr.
f The in-situ soil infiltration rate is greater than 0.2 in/hr.
A planting plan with species and densities is provided.
Mulch layer is specified in plans.
Planting soil meets minimum soil specifications (NCDENR Stormwater Best Management
Practices Manual, April 1999)
Plan details for the bioretention area provided.
Plan details for the inlet and outlet are provided.
V An operation and maintenance agreement signed and notarized by the responsible party is provided.
Please note that underdrains beneath the planting soil are acceptable in the Piedmont and Mountains
Id 6J"6SC-11-'
.F-7
' B-B
Lot #2 Bioretention Cell
EXIST NG 6" 4'rATER Surface area = 200 5q. ft. Lot #3 Bloretention Cell
Drainage Area = 0.092 ac. Surface area = 200 5q. ft.
Lot # I Bioretentlon Cell - Drainage Area = 0.08 ac.
Surface area = 285 5q. ft, -7
Drainage Area = 0.13 ac.
?-
4 ' PUB IC
Note:
51te and Vicinity Mapping and Data
Provided By:
John A. Edwards and Company
Con5Ulting Engineers
333 Wade Ave., Raleigh, NC 27605
Phone [phone]
Fax [phone]
E-mail [e-mail]
-SIPPOPO5ED IMPERVIOUS AREA
/ WITHIN NEU5E RIPARIAN BUFFER
LOT I - 33 5Q. IT.
LOT 2 - 160 5Q. PT.
LOT 3 - 8215Q. FT.
TOTAL - 1014 5Q. IT.
\V
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20 10 0 20
1224 AC *
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March 28, 2006
S&EC Project No. 9840.1) 1
Ms. Cindy Karoly
NCDENR - DWQ
Parkview Building
2321 Crabtree Boulevard
Raleigh, NC 27604
Environmental Consultants, PA
Road • Raleigh, North Carolina 27614 • Phone: [phone] • Fax: [phone]
www.SandEC.com
oc?
10
b1h".LITY
Reference: Pace Street Subdivision
REVISED Bioretention Area Design - Requested Modifications
DWQ# 06-0098
Dear Ms. Karoly:
The purpose of this letter is to formally submit modifications to our previously submitted
Preliminary Design Calculations & Concept Plan for a series of bioretention areas on the
above reference project in Wake County, NC. The enclosed data and information
provides an updated description of the proposed sizing modifications for site storm water
features.
If you will recall, on January 27, 2006 in a letter from your office, additional information
was requested regarding a series of three (3) previously proposed storm water
bioretention areas, including one on each of the three lots which comprise the Pace Street
Subdivision. Since receipt of your letter we have discussed the project with Mr. Ian
McMillan and Mr. Sam Aghimien of your office on various occasions to seek guidance
regarding potential modifications to our Concept Plan. Based on these discussions it is
our understanding that our proposed modifications (discussed herein) will provide DWQ
with sufficient information to make a decision regarding the approval of our client's
requested buffer impacts.
Based on input from your office and a review of site conditions (including numerous site
constraints) we have modified our plan such that a minimum Required Cell Area of 200
square feet is achieved on each of the three proposed bioretention areas.
Page 1 of 2
a
Pace Street Subdivision - Modifications Request Letter March 28, 2006
Soil & Environmental Consultants, PA Project No. 9840.D1
The following table includes the proposed modified summary of our preliminary design
results:
Required Recommended
Lot # / Drainage Area Weighted Bioretention Construction
Cell # sq. ft. (ac.) Rational
Coefficient Cell Area Area
(sq. ft.) (sq. ft.)
1 5,675 (0.12) 0.72 285 428
2 3,998 (0.092) 0.69 200 300
3 3,277 (0.08) 0.71 200 300
For planning purposes we have recommended that the Owner consider a total
construction area of 1.5 times the design surface area footprint required for the proposed
bioretention areas. This area is reflected in the table above.
The proposed bioretention areas will be integrated into the site landscaping plan to
provide the desired appearance. We have attached copies of the REVISED DWQ
Worksheet for each of the proposed bioretention areas for the proposed site development.
Also please find a REVISED Preliminary Site Plan reflected the proposed site conditions
including the size and location of the three bioretention areas. The remainder of our
design as described in our Preliminary Design Calculations & Concept Plan remains
unchanged.
Please review the enclosed documents and provide and comments or further questions at
your earliest opportunity. We appreciate your consideration on this modification request.
Sincerely,
SOIL & ENVIROMENT ' 9VJ,.TANTS, PA
.??yei
`,? ??(? ? ?? _ifi 1 Ors
w
8EAL
Patnck K. Smit , P.Er 025525 e
N.C. License No. 25525 3-28-0
- 141
Attachments: •?``""""?`,
1. REVISED DWQ - Bioretention Worksheets, 3 each
2. REVISED Preliminary Site Plan - Figure 5
Cc: Mr. Matt Blankinship
Mr. Jason Payne
Page 2 of 2

DWQ Project No.
DIVISION OF WATER QUALITY " BIORETENTION AREA WORKSHEET
1. PROJECT INFORPkTION (please complete the following information):
Project Name. aCe
Contact Person: ?hTeb? 5o'141 PG* Phone Number. (919
For projects with multiple basins, specify which basin this worksheet applies to: kof• I
Permanent Pool Elevation -rOD ft. (elevation of the orifice invert out)
Temporary Pool Elevation '1`f? U ft. (elevation of the outlet structure invert in)
Bioretention Surface Area 2R5 sq. ft.
Drainage Area 2 f 3 ac. (on-site and off-site drainage to the basin)
Impervious Area U• 09 ac. (on-site and off-site drainage to the basin)
Rational C Coefficient n.'L !r Wt r'°? ?c )2'141 v,4A / C
Size % % (either 5% in w/sand under drain or 7% in wio)
Inlet Velocity 7/RD fps
Inlet flow depth -r/l ?LL in
Depth to Ground Water ? jQ ft
Planting Soil Infiltration Rate :EOP in./hr. (the soil layer down to 4 feet)
In-Situ Soil Infiltration Rate 7'f? P inJhr. (the soil layer below 4 feet or below the sand bed)
II. REQUIRED ITEMS CHECKLIST
Initial in the space provided to indicate the following design requirements have been met and supporting documentation is attached. If a
requirement has not been met, attach an explanation of why. At a minimum, a complete stormwater management plan submittal includes
a worksheet for each BMP, design calculations, plans and specifications showing all BMPs and outlet structure details, a detailed
drainage plan and a fully executed operation and maintenance agreement. An incomplete submittal package will result in a request for
additional information and will substantially delay final review and approval of the project.
No vertical sand bed is proposed
The bioretention area is at least 40 feet by 15 feet.
Sheet flow is provided at inlet.
Water table depth is greater than 6 feet.
Minimum of 6" ponding is provided.
The ponded area will draw down in less than 4 days.
Planting soil infiltration rate is greater than 0.52 in/hr.
The in-situ soil infiltration rate is greater than 0.2 in/hr.
.A planting plan with species and densities is provided.
Mulch layer is specified in plans.
Planting soil meets minimum soil specifications (NCDENR Stormwater Best Management
Practices Manual, April 1999)
Plan details for the bioretention area provided.
Plan details for the inlet and outlet are provided.
An operation and maintenance agreement signed and notarized by the responsible party is provided.
Please note that underdrains beneath the planting soil are acceptable in the Piedmont and Mountains
1 ? be- ? ?G?-? r v r t ?'y??? 4 QVl ? ??°.SGr. I ??? ? I s• ?.
Tap - /
DWQ Project No.
DIVISION OF WATER QUALITY " BIORETENTION AREA WORKSHEET
1. PROJECT INFOR TION (please complg?tethe following information):
Project Name : P -n I-/ f c ?,:',L3
Contact Person: ?2 4Yf C K - `y7 0-n I ,.- Phone Number. LW f,q6, - /oU ?t. -
For projects with multiple basins, specify which basin this worksheet applies to: ? 6 -7_
Permanent Pool Elevation ft. (elevation of the orifice invert out)
Temporary Pool Elevation '772, 1') ft. (elevation of the outlet structure invert in)
Bioretention Surface Area -)n sq. ft.
Drainage Area Oct ?ac. (on-site and off-site drainage to the basin)
Impervious Area ( ac. (on-site and off-site drainage to the basin)
Rational C Coefficient 1 wt''S 1, /i1 /a ?i
?.. r I C
Size % % .
(either 5% in w/sand under drain or 7% in w/o)
Inlet Velocity fps
Inlet flow depth in
Depth to Ground Water ft
Planting Soil Infiltration Rate ?'1` Z') in./hr. (the soil layer down to 4 feet)
In-Situ Soil Infiltration Rate ! OD in./hr. (the soil layer below 4 feet or below the sand bed)
II. REQUIRED ITEMS CHECKLIST
Initial in the space provided to indicate the following design requirements have been met and supporting documentation is attached. If a
requirement has not been met, attach an explanation of why. At a minimum, a complete stormwater management plan submittal includes
a worksheet for each BMP, design calculations, plans and specifications showing all BMPs and outlet structure details, a detailed
drainage plan and a fully executed operation and maintenance agreement. An incomplete submittal package will result in a request for
additional information and will substantially delay final review and approval of the project.
No vertical sand bed is proposed
The bioretention area is at least 40 feet by 15 feet.
Sheet flow is provided at inlet
Water table depth is greater than 6 feet.
Minimum of 6" ponding is provided.
The ponded area will draw down in less than 4 days.
Planting soil infiltration rate is greater than 0.52 in/hr.
The in-situ soil infiltration rate is greater than 0.2 in/hr.
.A planting plan with species and densities is provided.
Mulch layer is specified in plans.
Planting soil meets minimum soil specifications (NCDENR Stormwater Best Management
Practices Manual, April 1999)
Plan details for the bioretention area provided.
Plan details for the inlet and outlet are provided.
.An operation and maintenance agreement signed and notarized by the responsible party is provided.
Please note that underdrains beneath the planting soil are acceptable in the Piedmont and Mountains

r re f {"Vvf-: l
DWQ Project
DIVISION OF WATER QUALITY • BIORETENTION AREA WORKSHEET
1. PROJECT INFORM ION (please complete the follo 'ng information):
Project Name : Q ee J{ T c .,'-I
Contact Person: < ,i hf , E Phone Number: PJI) O- ti?
For projects with multiple basins, specify which basin this worksheet applies to: l- 0+
Permanent Pool Elevation 11?P ft. (elevation of the orifice invert out)
Temporary Pool Elevation -7"T [% ft. (elevation of the outlet structure invert in)
Bioretention Surface Area ate sq. ft.
Drainage Area • 09 ac.
Impervious Area %'j • ra ac.
Rational C Coefficient
Size % '?- %
Inlet Velocity 7-RD ___ fps
Inlet flow depth in
Depth to Ground Water ft.
Planting Soil Infiltration Rate ?L3b in./hr
In-Situ Soil Infiltration Rate ? f in./hr
(on-site and off-site drainage to the basin)
(on-site and off ite drain a to the basin
Lv,<<ti 114t J O A_ --- L
(either 5% in w/sand under drain or 7% in w/o)
(the soil layer down to 4 feet)
(the soil layer below 4 feet or below the sand bed)
II. REQUIRED ITEMS CHECKLIST
Initial in the space provided to indicate the following design requirements have been met and supporting documentation is attached. If a
requirement has not been met, attach an explanation of why. At a minimum, a complete stormwater management plan submittal includes
a worksheet for each BMP, design calculations, plans and specifications showing all BMPs and outlet structure details, a detailed
drainage plan and a fully executed operation and maintenance agreement. An incomplete submittal package will result in a request for
additional information and will substantially delay final review and approval of the project.
Applicants Initials
l No vertical sand bed is proposed
The bioretention area is at least 40 feet by 15 feet.
Sheet flow is provided at inlet.
Water table depth is greater than 6 feet.
Minimum of 6" ponding is provided.
The ponded area will draw down in less than 4 days.
? Planting soil infiltration rate is greater than 0.52 in/hr.
I The in-situ soil infiltration rate is greater than 0.2 in/hr.
A planting plan with species and densities is provided.
Mulch layer is specified in plans.
Planting soil meets minimum soil specifications (NCDENR Stormwater Best Management
Practices Manual, April 1999)
Plan details for the bioretention area provided.
Plan details for the inlet and outlet are provided.
An operation and maintenance agreement signed and notarized by the responsible party is provided.
Please note that underdrains beneath the planting soil are acceptable in the Piedmont and Mountains

Lot #2 Bioretention Cell
EX,IS- NG 6" i,;'ATER Surface area = 200 5q. ft, - Lot #3 Bloretentlon Cell
Drainage Area = 0.092 ac. Surface area = 200 5q. ft.
Lot # I Bioretention Cell - Drainage Area = 0.08 ac.
Surface area = 2,55 5q. ft.
Drainage Area = 0.13 ac, -{?
FAZ 4 ' PUB IC
EX W.S.
Note:
Site and Vicinity Mapping and Data
Provided By:
John A. Edwards and Company
Consulting Engmeer5
333 Wade Ave., Raleigh, NC 27605
Phone [phone]
Fax [phone]
E-mail [e-mail]
?SIPROPOSED IMPERVIOUS ARPA
/WITHIN NEUSE RIPARIAN BUFFER
LOT I - 33 SQ. FT.
LOT 2 - 160 SQ. Ff.
LOT 3 - 821 SQ. FT.
TOTAL - 1014 SQ. Ff.
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FEE-1 200F.(M IN? 16 32
MATT & WENDY BLANKINSHIP
507 South 4ei Street - Mebane NC - 27302 - [phone]
February 13, 2006 - Via fax: [phone]
1v1s. Cyndi Karoly
Supervisor
NC DENR Division of Water Quality
Wetlands / 401 Unit
2321. Crabtree Boulevard, Suite 250
Raloigh, NC 27604
J:l-. 41:06 / 508 Pace Street - Raleigh, NC
DWQ Project u 06-0095
J)ea:r ;ti1s. Karoly:
P. 001/001
?D
FEe D
1 3 2006
tti °g4no r? R UALA1Y
?ef?y
Lim -writing to respond to you. letter of 2/2/2006, regardurg the Paco Street subdivision (DWQ project #
06-0098).
Ili your letter and request Ibr additional information, you requested detailed constriction drawings and
specifications for the three bioretention areas. It is my understanding that Jason Payne with Sail &
Environmental Consultants has contacted your office regarding the information required - S&T'C will be
forwarding the desiglr information requested as soon as possible.
As requested, 1 am writing to verify that your letter of 2/2/06 was received, and to indicate that we are
still interested in pursuing permitting for the property.
if you have any question:, you can contact me as follows:
Off,ce: [phone]
Cell: [phone]
1I0111c: (919) 30.1-5167
Since el
Matt Blankinsl
MB
MI]IJ lE1:2G TEL:91'-74 JJh89 ^ IICAHE:ElHO-HETLRIDS: Pi. 1
OF W A'149 Michael F. Easley, Governor
?
0
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i
? William G. Ross Jr., Secretary
? rI [ North Carolina Department of Environment and Natural Resources
L
p -? Alan W. Klimek, P.E. Director
Division of Water Quality
February 2, 2006
DWQ Project # 06-0098
Wake County
Page 1 of 2
CERTIFIED MAIL: RETURN RECEIPT REQUESTED
Mr. Matthew E. Blankinship
507s.4 th Street
Mebane, NC 27302
Subject Property: Matthew E. Blankinship - Pace Street Subdivision
Ut to Cemetary Branch [030402, 27-33-18-2, C, NSW]
REQUEST FOR MORE INFORMATION
Dear Mr. Blankinship:
On January 17, 2006, the Division of Water Quality (DWQ) received your application dated
January 16, 2006, to impact 1,172 square feet (ft2) of protected riparian buffers to construct the
proposed residential subdivision. On February 1, 2006, the DWQ received additional
information from you. The DWQ has determined that your application remains incomplete
and/or provided inaccurate information as discussed below. The DWQ will require additional
information in order to process your application to impact protected wetland, streams and/or
buffers on the subject property. Therefore, unless we receive the additional information
requested below, we will have to move toward denial of your application as required by 15A
NCAC 2H .0506 and 213 .0233(8) and will place this project on hold as incomplete until we
receive this additional information. Please provide the following information so that we may
continue to review your project.
Additional Information Requested:
Please provide the detailed construction drawings and technical specifications (as discussed
within the last paragraph on page 3 of 4 of your narrative) for the three proposed
bioretention areas.
Please contact the DWQ within three weeks of the date of this letter to verify that you have
received this letter and that you remain interested in continuing to pursue permitting of your
project and will be providing the DWQ the requested information at a later date. Please contact
me in writing and Eric Kulz of the DWQ Raleigh Regional Office. If we do not hear from you
within three weeks, we will assume that you no longer want to pursue this project and we will
consider the project as withdrawn.
401 Oversight/Express Review Permitting Unit
1650 Mail Service Center, Raleigh, North Carolina 276994650
2321 Crabtree Boulevard, Suite 250, Raleigh, North Carolina 27604
Phone: [phone] / FAX [phone] / Internet: httn://h2o.enr.state.nc.us/ncwetlands
None Carolina
Ntumily
An Equal Opportunity/Affirmative Action Employer- 50% Recycled/10% Post Consumer Paper
Mr. Matthew E. Blankinship
Page 2 of 2
February 2, 2006
This letter only addresses the application review and does not authorize any impacts to wetlands,
waters or protected buffers. Please be aware that any impacts requested within your application
are not authorized (at this time) by the DWQ. Please call Ms. Ian McMillan at 919-733-1786 if
you have any questions regarding or would like to set up a meeting to discuss this matter.
Sincerely,
Cyn i Karoly, Supervisor
401 Oversight/Express Review Permitting Unit
CBK/ijm
cc: Eric Kulz, DWQ Raleigh Regional Office
USACE Raleigh Regulatory Field Office
File Copy
Central Files
Jason Payne, Soil & Environmental Consultants, P.A., 11010 Raven Ridge Road,
Raleigh, NC 27614
Filename: 060098BIankinshipPaceStSD(W ake)On_Hold2
DWQ 4 C"-0098 Matthew Blankinship Pace St S/D
Subject: DWQ # 06-0098 Matthew Blankinship Pace St S/D
From: Laurie Dennison <lauri [e-mail]>
Date: Thu, 02 Feb 2006 15:21:10 -0500
To: [e-mail]
Please see attached the Division of Water Quality's request for more information
related to your recent application. Please note that this message is being forwarded
to you electronically so that you may expedite preparation of your response. Please
do not send your response as a reply to this e-mail or via fax. The hard copy is
being sent via US Mail. All response correspondence is to be mailed via hard copy to
the 401 oversight and Express Permits Unit, 2321 Crabtree Blvd., Raleigh, NC, 27604
unless otherwise noted.
060098BlankinshipPaceStSD(Wake)On_Hold2.doe Content-Type: application/msword
Content-Encoding: base64
1 of 1 2/2/2006 3:21 PM
Soil & Environmental Consultants, PA
11010 Raven Ridge Road • Raleigh, North Carolina 27614 • Phone: [phone] • Fax: [phone]
w ww.SandEC.com
ou - C)L
N.C. Division of Water Quality
401 Oversight and Express Permits Unit
Attn: Cyndi Karoly
2321 Crabtree Boulevard, Suite 250
Raleigh, NC 27604-2260
RE: Response to the January 27 Request for More Information
Pace Street Subdivision
Raleigh, Wake County, North Carolina
To Whom It May Concern:
January 31, 2006
S&EC Project # 9840.W 1
FE R it 2006
UEkR - f_.1 QUA I IY
VIE-i'J:!;3I::DSTi .- , I; E i t iv",i,CH
On January 30, 2006, S&EC received a request for more information from your office
regarding DWQ Project No. 06-0098. The purpose of this letter is to provide information your office
requested in the correspondence. Specifically, the request asks that the applicant provide site plans
including the three bioretention areas.
I am enclosing a copy of the site plan you requested for your review. I am also copying Ian
McMillan (DWQ) and Eric Kulz (DWQ) with a copy of the same plan.
We feel this additional information addresses the requests you made and should be sufficient for
approval of the proposed impacts. Please contact me at this office or by e-mail
(jpayne a SandEC.com) with specific requests if further information is required.
Sincerely,
Jason Payne
Environmental Scientist
cc: Mr. Eric Kulz / NC-DWQ Raleigh Regional Office
Mr. Ian McMillan / NC-DWQ
Charlotte Office:
236 LcPhillip Court, Suite C
Concord, NC 28025
Phone: [phone]
Fax: [phone]
Greensboro Office:
3817-E Lawndale Drive
Greensboro, NC 27455
Phone: [phone]
Fax: [phone]
PRELIMINARY DESIGN CALCULATIONS
& CONCEPT PLAN
STORM WATER
BffORETENTffON AREAS
WAKE COUNTY, NORTH CAROLINA
Prepared for:
John A. Edwards and Company
Pace Street Subdivision
Raleigh, NC 27606
January 11, 2006
S&EC Project No. 9840.131
Patrick K. Smith,
NC License No. 25
10
8EAL
5`r FF,'i ?go o a w °?``?
Soil & Environmental Consultants, PA
11010 Raven Ridge Road • Raleigh, North Carolina 27614 • Phone: [phone] • Fax: [phone]
www.SandEC.com
Soil & Environmental Consultants, PA
Pace Street Subdivision
S&EC Project No. 9840.1) 1
January 1 I, 2006
Project Location
The project is located within the City of Raleigh, in Wake County, NC.
Privately owned and consists of approximately 0.50 acres located on the SThe
ou property is
Pace Street approximately 100 feet cast of the intersection of Pace Street and side of
Street. See Figures 1, 2, and 3. and Northeast
Storm Water Treatment
It is anticipated that the treatment of storm water runoff will be re q of Water Quality (DWQ) as part of the permi project. Current
q by the Division
tting requirements for impacts
existing buffers associate with the proposed residential development
plans call for the demolition of the existing Pacts to the
into three separate lots containing b structure and subdividing two existing 50%) an the existing structure and a
three separate residences. n attached deck are located A significant portion (olots
ver
and 2). See Figure 4. The overall footprint of the proposed stru tunes ase buffer (Zones 1
shown
Figure 5 provides for a significant reduction of overall buffer impacts i in
The concept plan calls for the construction of a single B • in Zone 1.
each individual property. These bioretention areas will serve toltreat Area to storm be located on
associated with the proposed impervious area including roof, road, sidewalks,
and driveways. n water runoff
We understand that a stone water collection and drainage system will ,be
designed, and installed during site grading
and eb
convey a significant portion of site drainage to each proposed treatment
Depending on site conditions and future draina construction operations, to
device.
bioretention area may be necessary. be delig n b (y others) d more than one
Our preliminary evaluation of this feature has included device sizing f
Total Suspended Solids (TSS) reduction in accordance with generally accepted as outlined in the North Carolina Department of Environment and Natural Resources?ce
Manual and,othersappliicable references (DWQ)' Best Management Practices BM
s. ( P)
Total Suspended Solids (TSS) and Total Nitrogen (TN) Removal
The BMP manual outlines design requirements necessary to meet the
design standard of 85 percent removal of Total Suspended Solids TS pollutant removal
BMP manual, a bioretention area is assumed to have a TSS removal e
percent. Sized appropriately one or more biorete tion ( S)• Based on the
requirements for the proposed residence and assorted other site impervious areas.
Constructed properly, bioretention areas also contribute significant) to
Total Nitrogen. According to the Draft BMP Stormwater Manual from the N.
of Water Quality (DW Y the removal of
Efficiencies" Q), dated July 2005, and "Updates to StormwaterBMP C. Division
Memo from DWQ, dated September 8, 2004, bioretention areas are
I ofd
Soil & Environmental Consultants, PA
Pace Street Subdivision
S&EC Project No. 9840.131
January 11, 2006
currently considered to remove 35 percent of the TN from storm water inflow. And
although it is our understanding that no formal nitrogen removal evaluation is necessary,
the use of bioretention areas will clearly provide considerable benefits to the quality of
the surface water reaching the receiving watercourse.
Bioretcntion Area Planning & Design
Preliminary calculations for the sizing of the total footprint of the bioretention areas have
been perfonned. All necessary preliminary storm water design calculations and
supporting documentation are attached.
From available topographic data (site topographic data provided by John A. Edwards &
Company and site observations, the total drainage area for Lots 1, 2, and 3 are estimated
at 5,675 square feet (0.13 acres), 3,998 square feet (0.092 acres), and 3,277 square feet
(0.08 acres), respectively. Considering a distribution of the site land usage between
impervious area, maintained lawn, and forested areas, we estimated weighted Rational
Coefficients for each lot. Using the methods described in the BMP Manual we
detennined required bioretention surface areas needed to treat site runoff (assuming 7% -
no sand bed). These areas can be separated into one or more specific treatment areas if
appropriate. Whenever possible minimum length, width, and length to width ratios (and
other sizing criteria) as described in the BMP manual will be met or exceeded during
final design.
For planning purposes we have recommended that the Owner consider a total
construction area of 1.5 times the design surface area footprint required for the proposed
bioretention areas. These areas will be integrated into the site landscaping plan to
provide the desired appearance. We have attached the required DWQ Worksheet for the
proposed bioretention areas for the proposed site development. The following table
provides a summary of our preliminary design results:
Weighted Required Recommended
Lot # / Drainage Area Bioretcntion Construction
Cell # sq.ft. (ac.) Rational Cell Area Area
CocfGcient (sq. ft.) (sq. ft.)
1 5,675 (0.12) 0.72 285 428
2 3,998 (0.092) 0.69 200 300
3 3,277 (0.08) 0.71 170 255
Preliminary plans call for discharges from Cell 1 to be released into a level spreader
device located outside of Zone 2 of the buffer to allow for diffuse flow. Cells 2 and 3 are
proposed to discharge into the existing storm drainage system along Pace Street. Based
2 of 4
Soil & Environmental Consultants, PA S&EC Project No. 9340.131
Pace Street Subdivision January 11, 2006
on our discussion with the Division of Water Quality, we understand that once treated for
TSS storm water from a bioretention area can be discharged directly into the receiving
watercourse (in this case the immediately adjacent stream). However, it should be noted
that if done, this discharge must be made in a non-erosive fashion.
Once approval of this Concept Plan is received and the buffer variance is granted, a Final
Design including detailed Construction Drawings and Technical Specifications will be
prepared. The exact location and dimension for each bioretention area will be described
in detail in the final construction documents. Detailed design of the bioretention area(s)
to include but not limited to inflow distribution, treatment soil characteristics, plant
species, ponding depth, outlet structure sizing, and feature elevations will be determined
during Final Design. Certain planning assumptions have been made with regard to the
proposed discharge points. These assumptions will be confirmed during Final Design
and, if necessary, plans will be modified to meet regulatory requirements. An Operations
and Maintenance (O&M) Agreement will also be prepared at that time.
3 of4
Soil & Environmental Consultants, PA
Pace Street Subdivision
List of Attachments and Fip_ures
Attachments:
Preliminary Storm Water Calculations
Division of Water Quality Bioretention Area Worksheet
Breakdown of Square Footage of Existing and Proposed Houses
Figures:
Figure I - USGS Topographic Map
Figure 2 - Soil Survey Map
Figure 3 - Overall Site Development Plan
Figure 4 - Footprint of Current House and Impervious Surfaces
Figure 5 - Proposed Buffer Impact Map
S&EC Project No. 9840.131
January 11, 2006
6 pages
3 pages
I page
4 of4
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11010 Raven Ridge Road • Raleigh, North Carolina 27614 • Phone: [phone] • Fax: [phone] DATE JU
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Soil & Environmental Consultants, PA SHEET OF
11010 Raven Ridge Road • Raleigh, North Carolina 27614 • Phone: [phone] • Fax: [phone] DATE n 'O C
www.SandEC.com
DWQ Project No,
DIVISION OF WATER QUALITY - BIORETENTION AREA WORKSHEET
1. PROJECT INFOR ATION (please complete the following information):
Project Name : fl . S ?! ?' f , .,tea ~r
Contact Person: _ 61 ?y'l e w 1 ?i'- Phone Number. (?/%%) ?s"r! fr - `
For projects with multiple basins, specify which basin this worksheet applies to: _- )
Permanent Pool Elevation T G ft. (elevation of the orifice invert out)
Temporary Pool Elevation "I ft. (elevation of the outlet structure invert in)
Bioretention Surface Area 7 sq. ft.
Drainage Area 13 ac. (on-site and off-site drainage to the basin)
Impervious Area , O9 ac. (on-site and off-site drainage to the basin)
Rational C Coefficient i)';Ae j
Size % % (either 5% in wlsand under drain or 7% in w1o)
Inlet Velocity "r" 12i-? fps
Inlet flow depth "T QD in
Depth to Ground Water ft.
Planting Soil Infiltration Rate in./hr. (the soil layer down to 4 feet)
In-Situ Soil Infiltration Rate in./hr. (the soil layer below 4 feet or below the sand bed)
11. REQUIRED ITEMS CHECKLIST
Initial in the space provided to indicate the following design requirements have been met and supporting documentation is attached. If a
requirement has not been met, attach an explanation of why. At a minimum, a complete stormwater management plan submittal includes
a worksheet for each BMP, design calculations, plans and specifications showing all BMPs and outlet structure details, a detailed
drainage plan and a fully executed operation and maintenance agreement. An incomplete submittal package will result in a request for
additional information and will substantially delay final review and approval of the project.
Applicants Initials
Yt?S No vertical sand bed is proposed
The bioretention area is at least 40 feet by 15 feet.
Sheet flow is provided at inlet.
Water table depth is greater than 6 feet.
Minimum of 6" ponding is provided.
The ponded area will draw down in less than 4 days.
h Planting soil infiltration rate is greater than 0.52 in1hr.
The in-situ soil infiltration rate is greater than 0.2 in/hr.
A planting plan with species and densities is provided.
Mulch layer is specified in plans.
Planting soil meets minimum soil specifications (NCDENR Stormwater Best Management
Practices Manual, April 1999)
Plan details for the bioretention area provided.
Plan details for the inlet and outlet are provided.
An operation and maintenance agreement signed and notarized by the responsible party is provided.
Please note that underdrains beneath the planting soil are acceptable in the Piedmont and Mountains

"I tons

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JOB NO. ql qy , DI
Soil & Environmental Consultants, PA SHEET OF
11010 Raven Ridge Road • Raleigh, North Carolina 27614 • Phone: [phone] • Fax: [phone] DATE J? ' U
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DWQ Project
1. PROJECT INFORf
Project Name : J
Contact Person: _
For projects with multiple
Permanent Pool Elevation
Temporary Pool Elevation
Bioretention Surface Area
Drainage Area
Impervious Area
Rational C Coefficient
Size %
T Q `J ft. (elevation of the orifice invert out)
T & It. (elevation of the outlet structure invert in)
'201) sq. ft.
DO ac. (on-site and off-site drainage to the basin)
fir,, ac. (on-site and off-site drainage to the basin)
% (either 5% in w/sand under drain or 7% in w/o)
Inlet Velocity 7_012 fps
Inlet flow depth T7L) -in
Depth to Ground Water T3P ft.
Planting Soil Infiltration Rate TRH in./hr. (the soil layer down to 4 feet)
In-Situ Soil Infiltration Rate 'h_3, C) in./hr. (the soil layer below 4 feet or below the sand bed)
II. REQUIRED ITEMS CHECKLIST
Initial in the space provided to indicate the following design requirements have been met and supporting documentation is attached. If a
requirement has not been met, attach an explanation of why. At a minimum, a complete stormwater management plan submittal includes
a worksheet for each BMP, design calculations, plans and specifications showing all BMPs and outlet structure details, a detailed
drainage plan and a fully executed operation and maintenance agreement. An incomplete submittal package will result in a request for
additional information and will substantially delay final review and approval of the project.
Aoolicants Initials
//!11-' No vertical sand bed is proposed
The bioretention area is at least 40 feet by 15 feet.
Sheet flow is provided at inlet.
Water table depth is greater than 6 feet.
Minimum of 6'ponding is provided.
The ponded area will draw down in less than 4 days.
Planting soil infiltration rate is greater than 0.52 in/hr.
The in-situ soil infiltration rate is greater than 0.2 in/hr.
A planting plan with species and densities is provided.
Mulch layer is specified in plans.
Planting soil meets minimum soil specifications (NCDENR Stormwater Best Management
Practices Manual, April 1999)
Plan details for the bioretention area provided.
Plan details for the inlet and outlet are provided.
An operation and maintenance agreement signed and notarized by the responsible party is provided.
Please note that underdrains beneath the planting soil are acceptable in the Piedmont and Mountains
T?G D - ? a v?

By DIVISION OF WATER QUALITY • BIORETENTION AREA WORKSHEET
JAB Hr,.
SHIEE-7 I0 OF
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TION (please completq the following information):
Phone Number: (91A) (/(a - '-"` ,Xf)
specify which basin this worksheet applies to: L,2}-Z
Soil &r Environmental Consultants, PA
11010 Raven Ridge Road • Raleigh, North Carolina 27614 • Phone: [phone] • Fax: [phone]
www.SandEC.com
JOB NAME
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SUBJECT

JOB NO. '7,N O, D/
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JOB NAME elc /F:7
SUBJECT /;Ijt(t)17
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DWQ Project No.
DIVISION OF WATER QUALITY - BIORETENTION AREA WORKSHEET
1. PROJECT INFO7746'e-Tr ION (please complete the following information):
Project Name : -7"t f Contact Person: k I< ti `. ? !VPhone Number: (171 ) For projects with multiple basins, specify which basinlhis worksheet applies to:

Permanent Pool Elevation ft. (elevation of the orifice invert out)
Temporary Pool Elevation 7; D ft. (elevation of the outlet structure invert in)
Bioretention Surface Area sq. ft.
Drainage Area e?!) . 09 ac. (on-site and off-site drainage to the basin)
Impervious Area 0.05 ac. (on-site and off-site drainage to the basin)
Rational C Coefficient f).'7 f ( w ". "p, W
Size % ?- % (either 5% in w/sand under drain or 7% in w/o)
Inlet Velocity
fps
Inlet flow depth in
Depth to Ground Water ft.
Planting Soil Infiltration Rate in./hr. (the soil layer down to 4 feet)
In-Situ Soil Infiltration Rate ?M- in./hr. (the soil layer below 4 feet or below the sand bed)
II. REQUIRED ITEMS CHECKLIST
Initial in the space provided to indicate the following design requirements have been met and supporting documentation is attached. If a
requirement has not been met, attach an explanation of why. At a minimum, a complete stormwater management plan submittal includes
a worksheet for each BMP, design calculations, plans and specifications showing all BMPs and outlet structure details, a detailed
drainage plan and a fully executed operation and maintenance agreement. An incomplete submittal package will result in a request for
additional information and will substantially delay final review and approval of the project.
A lican Ini ' Is
No vertical sand bed is proposed
The bioretention area is at least 40 feet by 15 feet.
Sheet flow is provided at inlet.
Water table depth is greater than 6 feet.
Minimum of 6" ponding is provided.
The ponded area will draw down in less than 4 days.
T 17 Planting soil infiltration rate is greater than 0.52 in/hr.
The in-situ soil infiltration rate is greater than 0.2 in/hr.
A planting plan with species and densities is provided.
Mulch layer is specified in plans.
Planting soil meets minimum soil specifications (NCDENR Stormwater Best Ma
Practices Manual, April 1999)
Plan details for the bioretention area provided.
Plan details for the inlet and outlet are provided.
An operation and maintenance agreement signed and notarized by the respon
Please note that underdrains beneath the planting soil are acceptable in the Piedmont and Mountains
nagement
risible party is provided.

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Site and Vicinity Mapping and Data
Provided By:
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333 Wade Ave., Raleigh, NC 27605
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E-mail [e-mail]
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FROJCCT NO.:
9840.D I MAP 50UPL[: 5ilUT TRIL: _
FKOAC J b16R .: Preliminary Site Plan EX15TING FOOTPRINT-IMPACT MAP '
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Note:
51te and Vicinity Mapping and Data NORTH
Provided By: Scale 1 30'
John A. Edwards and Company
Con5ultin3 Engineers PROPOSED IMPERVIOUS AREA
__
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333 Wade Ave., Raleigh, NC 2 7605
LOT 1 - 33 50. FT. 1777 = 1
Phone [phone] LOT 2 - 1 GO 50. FT.
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Pax (919) 828-471 I LOT 3 -5 2 150. FT.
E-mail [e-mail]
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PROJECT NO. MAP 50UKCC: 5n ELT TmL:
9 PROPOSED BUFFER IMPACT MAP '-?- '
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PROJECT CT MGR.: PreliminaN Site Plan - O
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DRAWN BY: PROJECT NAME Soil a Consu
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Environmenta
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PACE STREET SUBDIVISION 1101 0 RavcnRidge Road • Relcigh, North Cuolin+27614
Phone: [phone] • Fax: [phone]
SHEET NO.: LOCATION: CucNr: J
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FIGURE 5 WAKE COUNTY, NC
JOHN A EDWARDS AND COMPANY
? n , n0 0 98
Soil & Environmental Consultants, PA
11010 Raven Ridge Road • Raleigh, North Carolina 27614 • Phone: [phone] • Fax: [phone]
www.SandEC.com
January 16, 2006
S&EC Project # 9840.W1
To: N.C. Division of Water Quality - 7
401 Oversight and Express Permits Unit l
Attn: Cyndi Karoly
2321 Crabtree Boulevard, Suite 250
Raleigh, NC 27604-2260
From: Jason Payne
Soil & Environmental Consultants, P.A.
11010 Raven Ridge Road h '
Raleigh, NC 27614 U? JP p?r??ycN
Re: MINOR VARIANCE REQUEST - Neuse Buffer Rule
CtlGnty, NC
Pace Street Subdivision, 506 & 508 Pace Street, Raleigh, Wak%
On behalf of the owners, Mr. & Mrs. Blankinship, please find attached a complete Minor Variance
Request, Stormwater Management Plan and supplemental information for the subject property as
described within 15A NCAC 02B .0233(9)(b). Please contact me at [phone] if you have
any questions or require additional information.
PROJECT SUMMARY
Project Name Pace Street Subdivision
Project Type Residential
Owner / Applicant Mathew E. Blankinship
Count Wake
Nearest Town Raleigh
Waterbod Name UT to Cemetery Branch
Basin / Sub-basin 03-04-02
Index Number 27-33-18-2
Class C-NSW
IMPACT SUMMARY
Buffer Impact - Zone 1 0
Buffer Impact - Zone 2 1,172 sf
Buffer Impact-Total 1,172 sf
Attachments:
Minor Variance Request Form
Stormwater Management Plan
Agent Authorization Form
Figure 1. USGS Quadrangle
Figure 2. NRCS Soil Survey Map
Figure 3. Wake County GIS Site Vicinity
Charlotte Office: Greensboro Office:
236 LePhillip Court, Suite C 3817-E Lawndale Drive
Concord, NC 28025 Greensboro, NC 27455
Phone: [phone] Phone: [phone]
Fax: [phone] Fax: [phone]
OFFICE USE ONLY: Date Received Request #
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality 2 0 0 6 0 0 9 8
Variance Request Form - for Minor Variances
Protection and Maintenance of Riparian Areas Rules
NOTE. This form may be photocopied for use as an original.
Please identify which Riparian Area (Buffer) Protection Rule applies.
® Neuse River Basin: Nutrient Sensitive Waters Management
Strategy Protection and Maintenance of Riparian Areas Rule (15A
NCAC 02B.0233)
? Tar-Pamlico River Basin: Nutrient Sensitive Waters Management
Strategy Protection and Maintenance of Riparian Areas Rule (15A
NCAC 0213.0259)
? Catawba River Basin: Protection and Maintenance of Existing
Riparian Buffers (15A NCAC 02B.0243)
Part 1: General Information
(Please include attachments if the room provided is insufficient.)
1. Applicant's name (the corporation, individual, etc. who owns the property):
Mr. Mathew E. Blankinship & Mrs. Wendy J. Blankinship (Owners)
2. Print Owner/Signing Official (person legally responsible for the property and its compliance)
Name: Mr. Mathew E. Blankinship
Title: Owner
Street address: 507 S 4`r' Street
City, State, Zip: Mebane, NC 27302
Telephone: [phone]
Fax: [phone]
3. Contact person who can answer questions about the proposed project:
Name: Jason Payne, S&EC, PA
Telephone: [phone]
Fax: [phone]
Email: jpayne .sandec.com
4. Project Name (Subdivision, facility, or establishment name -consistent with project name on
plans, specifications, letters, operation and maintenance agreements, etc.):
Pace Street Subdivision - 506 & 508 Pace Street, Raleigh, NC
Version 2: November 2002
5. Project Location:
Street address: 506 & 508 Pace Street
City, State, Zip: Raleigh, NC 27604
County: Wake
Latitude/longitude: 35.7887° N / 78.6313° W (WGS84/NAD83)
6. Directions to site from nearest major intersection (Also, attach an 8 %2 x 11 copy of the USGS
topographic map indicating the location of the site):
The property is located at 506 & 508 Pace Street: from the intersection of Capital Blvd and 1-
440, take Capital Blvd South to the Atlantic Avenue exit. Turn Left onto Atlantic Avenue /
Wake Forest Road. Continue -0.8 miles to Sasser St, and turn left onto Sasser St. Fallow
Sasser St to N Bloodworth St and turn Right onto N Bloodworth St. Follow Bloodworth St
south to E Franklin St and turn left onto E Franklin St. Follow E. Franklin St approximately
one block to N East St and turn Right onto N East St. Follow N East St South approximately
one block and turn left onto Pace St. The project is located at the second house on the right.
7. Stream to be impacted by the proposed activity:
Stream name (for unnamed streams label as "UT" to the nearest named stream):
UT Cemetery Branch 03-04-02; 27-33-18-2
Stream classification [as identified within the Schedule of Classifications 15A NCAC 213.0315
(Neuse) or.0316 (Tar-Pamlico)]:
C', NSW
8. Which of the following permits/approvals will be required or have been received already for
this project?
Required: Received: Date received: Permit Type:
NO CAMA Major
NO CAMA Minor
NO 401 Certification/404 Permit
NO On-site Wastewater Permit
NO NPDES Permit (including stormwater)
NO Non-discharge Permit
NO Water Supply Watershed Variance
YES NO Others (specify) Construction Permit
Part 2: Proposed Activity
(Please include attachments if the room provided is insufficient.)
1. Description of proposed activity [Also, please attach a map of sufficient detail (such as a plat
map or site plan) to accurately delineate the boundaries of the land to be utilized in carrying
out the activity, the location and dimension of any disturbance in the riparian buffers
associated with the activity, and the extent of riparian buffers on the land. Include the area
of buffer impact in ftz.]:
The proposed activity includes the demolition of an existing house within Zone 1 and Zone 2
of the riparian buffer. The lot will be combined with the adjacent empty lot and then
subdivided into three lots. The applicant then proposes to construct three new homes (see
overall site Dian in the attached °Stormwater Bio-Retention Area. Concent Plans").
A portion of the existing house is located in Zone 1 and Zone 2 of the riparian buffer. New
homes and other associated impervious surface will alloy the recoverv of Zone 1 buffer
Variance Request Form, page 2
Version 2: November 2000
currently occupied by the current structure. Existing structures will be removed from Zone 1
and Zone 2 and new structures will be located in a different location with only Zone 2 impacts
proposed.
Only non-native/exotic nuisance vegetation (as listed in the "Exotic Plant Guideline") will be
removed from the riparian buffer. No existing trees will be removed from Zone 1. A total of
977 square feet of existing structures located within the buffer will be converted to grass,
landscaped or other pervious surfaces (mulch, etc.).
The project will result in the removal of 977 square feet of structures from the buffer, and
1 172 square feet of new impervious surfaces will be located within the buffer (Zone 2 only)
where it did not previously exist.
As such, we are requesting a minor variance for 1,172 square feet.
Although the proposed project will result in a net loss of 195 square feet of riparian buffer, the
project will allow the recovery of 356 square feet of Zone 1 riparian buffer. We are not
proposing to pay into the Riparian Buffer Restoration Fund to mitigate for this activity given
that the project will result in the recovery of 356 square feet of Zone 1 riparian buffer and a
net loss of only 551 square feet of Zone 2 buffer. Moreover, the proposed project will involve
the removal of structures from the protected buffer and the installation of a bio-retention area
on each lot to treat the stormvrater runoff from the new homes. If payment is determined to
be required, then %ve request a conditional approval that this payment be made.
2. State reasons why this plan for the proposed activity cannot be practically accomplished,
reduced or reconfigured to better minimize or eliminate disturbance to the riparian buffers:
The properties consist of (2) existing residential lots. The first lot already has a house on it
and the second lot does not. Due to the location of the stream a variance would be required
to construct a house on the second lot. We are proposing to subdivide the hvo lots into three
lots and to remove the existing house: by doing so we will be able to remove all existinq
impervious surfaces from Zone 1 of the buffer. Therefore, the project will improve the
functions of the existing buffer by removing existing structures from Zone 1 and treating
stormwater runoff from the new impervious surface. Due to the surrounding lot size and
homes in the community, the proposed houses and lot configuration would also be more
compatible with the existing, surrounding neighborhood. Construction of the three single
family residences is reasonable use of the property, to be compatible with the existing
surroundina neiahborhood.
Note: Leaving the property in its current condition of 2 separate larger lots does not eliminate the need to
request a minor variance to make reasonable use of the property.
3. Description of any best management practices to be used to control impacts associated with
the proposed activity (i.e., control of runoff from impervious surfaces to provide diffuse flow,
re-planting vegetation or enhancement of existing vegetation, etc.):
The proposed BMPs to be used primarily include bio-retention areas / rain gardens on each
lot desiqned to DENR specifications (see attached " Stonnwater Bio-retention Areas"
conceptual plan°). Roof surface runoff from the proposed houses and new impervious
surface will be directed to and treated by these bio-retention areas. Runoff from the existing
house is currently not treated by an engineered designed stormvrater BMP device. Existing
structures within Zone 1 will be removed and the buffer will be enhanced by replanting and/or
replacing exotic vegetation with native species. The variance requested includes removal of
an existing structure within the buffer: which will help mitigate or offset the proposed activity in
the variance reauested
Variance Request Form, page 3
Version 2: November 2000
4. Please provide an explanation of the following:
(1) The practical difficulties or hardships that would result from the strict application of this
Rule.
See attached Requirements Listed within 15A NCAC 02B .0233(9)(a)
(2) Now these difficulties or hardships result from conditions that are unique to the property
involved.
The hardship is unique to the applicant's property. The open stream (i.e. "Lin-piped) on the
property has been previously piped on the neighboring properties upstream and downstream
from this property.
(3) If economic hardship is the major consideration, then include a specific explanation of the
economic hardships and the proportion of the hardship to the entire value of the project.
The major consideration is reasonable use of the property, which is to build three single-
family residences of a size and style compatible with the existing neighborhood. Economic
hardship is not the major consideration, but it is a result of the major consideration, which is
reasonable use of the property. If a minor variance is not granted, then a majority of the
property cannot be reasonably used which is to construct a single family residence on each
lot - the existing 508 Pace Street lot is not even reasonably "buildable" if a minor variance is
not granted, If the minor variance is not granted, then the proportion of the hardship is close
to 100%. We would have to try to sell the property to someone who would want to build a
huge house on one large lot, which would cost more than the market will alloy in the area
around Pace Street
Part 3: Deed Restrictions
By your signature in Part 5 of this application, you certify that all structural stormwater best
management practices required by this variance shall be located in recorded stormwater
easements, that the easements will run with the land, that the easements cannot be changed or
deleted without concurrence from the State, and that the easements will be recorded prior to the
sale of any lot.
Part 4: Agent Authorization
If you wish to designate submittal authority to another individual or firm so that they may provide
information on your behalf, please complete this section:
Designated agent (individual or firm): Jason Payne. Soil & Environmental Consultants, PA
Mailing address: 11010 Raven Ridge Road
City, State, Zip: Raleigh, NC 27614
Telephone: [phone]
Fax: [phone]
Email: inavnensandec.com
Part 5: Applicant's Certification
I, Mr. Mathew E. Blankinship (print or type name of person listed in Part I, Item 2), certify that the
information included on this permit application form is correct, that the project will be constructed
in conformance with the approved plans and that the deed restrictions in accordance with Part 5
of this form will ba-recorded with Al required permit conditions.
Signature: ?-I ;L/%
Date: Janraary 16. 2006
Title: En -mental Scientist, S&EC, PA
Variance Request Form, page 4
Version 2: November 2000
RESPONSES TO REQUIREMENTS
LISTED WITHIN 15A NCAC 02B.0233(9)(a)
(i) There are practical difficulties or unnecessary hardships that prevent compliance with the strict
letter of the riparian buffer protection requirements. Practical difficulties or unnecessary hardships
shall be evaluated in accordance with the following:
(A) If the applicant complies with the provisions of this Rule, he/she can secure no reasonable
return front, nor make reasonable use of, h is/her property. Merely proving that the variance
would permit a greater profit front the property shall not be considered adequate justification
for a variance. Moreover, the Division or delegated local authority shall consider whether the
variance is the mininttan possible deviation front the terms of this Rule that shall make
reasonable use of the property possible.
Response: The properties consist of (2) existing residential lots. The first lot already
has a house on it and the second lot does not. Due to the location of the stream, a
variance would be required to construct a house on the second lot. We are proposing
to subdivide the two lots into three lots and to remove the existing house; by doing so
we will be able to remove all existing impervious surfaces from Zone 1 of the buffer.
Therefore, the project will improve the functions of the existing buffer by removing
existing structures from Zone 1 and treating stormwater runoff from the new
impervious surface. Due to the surrounding lot size and homes in the community, the
proposed houses and lot configuration would also be more compatible with the
existing, surrounding neighborhood. Construction of the three single family
residences is reasonable use of the property, to be compatible with the existing
surrounding neighborhood.
Note: Leaving the property in its current condition of 2 separate larger lots does not
eliminate the need to request a minor variance to make reasonable use of the property.
(B) The hardship results front application of this Rule to the property rather than front other
factors such as deed restrictions or other hardship.
Response: The hardship results solely from application of the Rule. Planned
construction on the property is feasible, except when the Rule is applied.
(C) The hardship is due to the physical nature of the applicant's property, such as its size,
shape, or topography, which is different front that of neighboring property.
Response: The hardship is created by the location of the open stream through the rear
portion of the property. Neighboring properties do not have the open stream as the
neighboring properties have previously piped the stream (on the upstream and
downstream side adjacent to the property).
(D) The applicant did not cause the hardship by knowingly or unknowingly violating this Rule.
Response: The applicant has not knowingly violated the Rule or created the hardship.
The applicant purchased the property without knowledge of the Rule being applied to
the property (buffer protection requirements were not disclosed to the applicant, or
discovered by the applicant until after the property was purchased).
Variance Request Form, page 5
Version 2: November 2000
(E) The applicant did not purchase the property after the effective date of this Rule, and theft
requesting an appeal.
Response: (Similar to "D" above) - The applicant was not aware of the Rule being
applied to the property until after the property was purchased and subdivision
applications had been reviewed by local authority.
(F) The hardship is unique to the applicant's property, rather than the result of conditions that
are widespread. If other properties are equally subject to the hardship created in the
restriction, then granting a variance would be a special privilege denied to others, and would
not promote equal justice;
Response: The hardship is unique to the applicant's property. The open stream on the
property has been previously piped by neighboring properties on the upstream side of
the property and the downstream side of the property.
(ii) The variance is in harmony with the general purpose and intent of the State's riparian beer
protection requirements and preserves its spirit; and
Response: The requested variance follows the purpose and intent of the buffer
protection requirements. The end result if approved will be the recovery of area
within Zone 1 of the buffer and stormwater treatment in the form of bioretention areas
for all impervious surfaces on the lots.
(iii) In granting the variance, the public safety and welfare have been assured water quality has been
protected, and substantial justice has been done.
Response: the variance requested will assure public safety and welfare. Proper steps
will be taken to protect water quality in the form of treatment of all impervious
surfaces using bioretention areas.
Variance Request Form, page 6
Version 2: November 2000
SITE PHOTOS
Variance Request Form, page 7
Version 2: November 2000
51 I L HHU I U 1. tX15 I INCA t1UUJt LUUb - f KUN I VItVV I
Variance Request Form, page 8 i
Version 2: November 2000
SITE PHOTO 2. EXISTING HOUSE 2006 - From NE Corner I
Variance Request Form, page 9
Version 2: November 2000

I I IL 1 1\\JI I?L?I\1 ? VV11?1\V 11 ?V 1 IVVV1?
Variance Request Form, page 10
Version 2: November 2000
PROPEERTY BEHIND THE HOUSE
Variance Request Form, page 11
Version 2: November 2000

Variance Request Form, page 12
Version 2: November 2000

STREAMBANK
Variance Request Form, page 13
Version 2: November 2000
I
i
Variance Request Form, page 14
Version 2: November 2000
ENTERS ANOTHER PIPE TO THE EAST
Variance Request Form, page 15
Version 2: November 2000
SITE PHOTO 9. EXISTING STREAMSIDE BUFFER NORTH OF THE STREAM NEAR THE
EASTERN PROPERTY LINE - NOTE THE PRESENCE OF EXOTIC VEGETATION.
PRELIMINARY DESIGN CALCULATIONS
& CONCEPT PLAN
WAKE COUNTY, NORTH CAROLINA
Prepared for:
John A. Edwards and Company
Pace Street Subdivision
Raleigh, NC 27606
January 11, 2006
S&EC Project No. 9840.D1
STORM WATER
BIORETENTION AREAS
Patrick K. Smith, P
NC License No. 25
SEAL
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K 6C. •
Soil & Environmental Consultants, PA
11010 Raven Ridge Road • Raleigh, North Carolina 27614 • Phone: [phone] • Fax: [phone]
www.SandEC.com
Soil & Environmental Consultants, PA S&EC Project No. 9840.131
Pace Street Subdivision January 11, 2006
Project Location
The project is located within the City of Raleigh, in Wake County, NC. The property is
privately owned and consists of approximately 0.50 acres located on the south side of
Pace Street approximately 100 feet east of the intersection of Pace Street and Northeast
Street. See Figures 1, 2, and 3.
Storm Water Treatment
It is anticipated that the treatment of storm water runoff will be required by the Division
of Water Quality (DWQ) as part of the pennitting requirements for impacts to the
existing buffers associate with the proposed residential development project. Current
plans call for the demolition of the existing structure and subdividing two existing lots
into three separate lots containing three separate residences. A significant portion (over
50%) an the existing structure and an attached deck are located within the buffer (Zones 1
and 2). See Figure 4. The overall footprint of the proposed structures as shown in
Figure 5 provides for a significant reduction of overall buffer impacts in Zone 1.
The concept plan calls for the construction of a single Bioretention Area to be located on
each individual property. These bioretention areas will serve to treat storm water runoff
associated with the proposed impervious area including roof, road, sidewalks, porches,
and driveways. We understand that a storm water collection and drainage system will be
designed, and installed during site grading and building construction operations, to
convey a significant portion of site drainage to each proposed treatment device.
Depending on site conditions and future drainage design (by others) more than one
bioretention area may be necessary.
Our preliminary evaluation of this feature has included device sizing for the removal of
Total Suspended Solids (TSS) reduction in accordance with generally accepted practice
as outlined in the North Carolina Department of Environment and Natural Resources
(NCDENR), Division of Water Quality (DWQ), Best Management Practices (BMP)
Manual and other applicable references.
Total Suspended Solids (TSS) and Total Nitrogen (TN) Removal
The BMP manual outlines design requirements necessary to meet the pollutant removal
design standard of 85 percent removal of Total Suspended Solids (TSS). Based on the
BMP manual, a bioretention area is assumed to have a TSS removal efficiency of 85
percent. Sized appropriately one or more bioretention areas will meet the removal
requirements for the proposed residence and assorted other site impervious areas.
Constructed properly, bioretention areas also contribute significantly to the removal of
Total Nitrogen. According to the Draft BMP Stortnwater Manual from the N.C. Division
of Water Quality (DWQ), dated July 2005, and "Updates to Stormwater BMP
Efficiencies" Memo from DWQ, dated September 8, 2004, bioretention areas are
1 of 4
Soil R Environmental Consultants, PA
Pace Street Subdivision
SR EC Project No. 9840.131
January 11, 2006
currently considered to remove 35 percent of the TN from storm water inflow. And
although it is our understanding that no formal nitrogen removal evaluation is necessary,
the use of bioretention areas will clearly provide considerable benefits to the quality of
the surface water reaching the receiving watercourse.
Bioretention Area Planning & Design
Preliminary calculations for the sizing of the total footprint of the bioretention areas have
been performed. All necessary preliminary storm water design calculations and
supporting documentation are attached.
From available topographic data (site topographic data provided by John A. Edwards &
Company and site observations, the total drainage area for Lots 1, 2, and 3 are estimated
at 5,675 square feet (0.13 acres), 3,998 square feet (0.092 acres), and 3,277 square feet
(0.08 acres), respectively. Considering a distribution of the site land usage between
impervious area, maintained lawn, and forested areas, we estimated weighted Rational
Coefficients for each lot. Using the methods described in the BMP Manual we
determined required bioretention surface areas needed to treat site runoff (assuming 7% -
no sand bed). These areas can be separated into one or more specific treatment areas if
appropriate. Whenever possible minimum length, width, and length to width ratios (and
other sizing criteria) as described in the BMP manual will be met or exceeded during
final design.
For planning purposes we have recommended that the Owner consider a total
construction area of 1.5 times the design surface area footprint required for the proposed
bioretention areas. These areas will be integrated into the site landscaping plan to
provide the desired appearance. We have attached the required DWQ Worksheet for the
proposed bioretention areas for the proposed site development. The following table
provides a summary of our preliminary design results:
Required Recommended
Lot # / Drainage Area Weighted Bioretention Construction
Cell # sq.ft. (ac.) Rational Cell Area Area
Coefficient (sq. ft.) (sq. ft.)
1 5,675 (0.12) 0.72 285 428
2 3,998 (0.092) 0.69 200 300
3 3,277 (0.08) 0.71 170 255
Preliminary plans call for discharges from Cell 1 to be released into a level spreader
device located outside of Zone 2 of the buffer to allow for diffuse flow. Cells 2 and 3 are
proposed to discharge into the existing storm drainage system along Pace Street. Based
2 of 4
Soil & Environmental Consultants, PA S&EC Project No. 9840.D1
Pacc Strect Subdivision January 11, 2006
on our discussion with the Division of Water Quality, we understand that once treated for
TSS storm water from a bioretention area can be discharged directly into the receiving
watercourse (in this case the immediately adjacent stream). However, it should be noted
that if done, this discharge must be made in a non-erosive fashion.
Once approval of this Concept Plan is received and the buffer variance is granted, a Final
Design including detailed Construction Drawings and Technical Specifications will be
prepared. The exact location and dimension for each bioretention area will be described
in detail in the final construction documents. Detailed design of the bioretention area(s)
to include but not limited to inflow distribution, treatment soil characteristics, plant
species, ponding depth, outlet structure sizing, and feature elevations will be determined
during Final Design. Certain planning assumptions have been made with regard to the
proposed discharge points. These assumptions will be confirmed during Final Design
and, if necessary, plans will be modified to meet regulatory requirements. An Operations
and Maintenance (O&M) Agreement will also be prepared at that time.
3 of 4
Soil & Environmental Consultants, PA
Pace Street Subdivision
List of Attachments and Figures
Attachments:
Preliminary Storm Water Calculations
Division of Water Quality Bioretention Area Worksheet
Breakdown of Square Footage of Existing and Proposed Houses
Figures:
Figure 1 - USGS Topographic Map
Figure 2 - Soil Survey Map
Figure 3 - Overall Site Development Plan
Figure 4 - Footprint of Current House and Impervious Surfaces
Figure 5 - Proposed Buffer Impact Map
S&EC Project No. 9840.131
January 11, 2006
6 pages
3 pages
1 page
4 of4
Soil & Environmental Consultants, PA
Pace Street Subdivision
List of Attachments and Figures
Attachments:
Preliminary Stormwater Calculations
Division of Water Quality Bioretention Area Worksheet
Breakdown of Square Footage of Existing and Proposed Houses
Figures:
Figure 1-USGS Topographic Map
Figure 2-Soil Survey Map
Figure 3-Preliminary Site Plan
Figure 4-Footprint of Current House and Impervious Surfaces
Figure 5-Proposed Buffer Impact Map
S&EC Project No. 9840.1) 1
January 11, 2005
6 pages
3 pages
1 page
4 of 4
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DWQ Project
DIVISION OF WATER QUALITY - BIORETENTION AREA WORKSHEET
1. PROJECT INFOR ATION (pl ase complete the following information):
Project Name: o et' '
Contact Person: % t ?+6 Phone Number.
For projects with multiple basins, specify which basin this worksheet applies to: oQ}- 1
Permanent Pool Elevation TQ D ft. (elevation of the orifice invert out)
Temporary Pool Elevation T C? ft. (elevation of the outlet structure invert in)
Bioretention Surface Area c7 sq. ft.
Drainage Area 'ep. 13 ac. (on-site and off-site drainage to the basin)
Impervious Area n . d9 ac. (on-site and off-site drainage to the basin)
Rational C Coefficient Q. ?Z (Wei g )1' e j
Size % % (either 5% in w/sand under drain or 7% in w/o)
Inlet Velocity Tt?? fps
Inlet flow depth T >3D in
Depth to Ground Water I-C?D ft.
Planting Soil Infiltration Rate -"PP in./hr. (the soil layer down to 4 feet)
In-Situ Soil Infiltration Rate -FF, in./hr. (the soil layer below 4 feet or below the sand bed)
II. REQUIRED ITEMS CHECKLIST
Initial in the space provided to indicate the following design requirements have been met and supporting documentation is attached. If a
requirement has not been met, attach an explanation of why. At a minimum, a complete stormwater management plan submittal includes
a worksheet for each BMP, design calculations, plans and specifications showing all BMPs and outlet structure details, a detailed
drainage plan and a fully executed operation and maintenance agreement. An incomplete submittal package will result in a request for
additional information and will substantially delay final review and approval of the project.
ADDlicantS Initials
YIQb No vertical sand bed is proposed
The bioretention area is at least 40 feet by 15 feet.
Sheet flow is provided at inlet.
Water table depth is greater than 6 feet.
Minimum of 6" ponding is provided.
The ponded area will draw down in less than 4 days.
Planting soil infiltration rate is greater than 0.52 in/hr.
The in-situ soil infiltration rate is greater than 0.2 in/hr.
A planting plan with species and densities is provided.
Mulch layer is specified in plans.
Planting soil meets minimum soil specifications (NCDENR Stormwater Best Management
Practices Manual, April 1999)
Plan details for the bioretention area provided.
Plan details for the inlet and outlet are provided.
An operation and maintenance agreement signed and notarized by the responsible party is provided.
Please note that underdrains beneath the planting soil are acceptable in the Piedmont and Mountains
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1. PROJECT INFORI
Project Name:
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Contact Person: _
For projects with multiple
Permanent Pool Elevation
Temporary Pool Elevation
Bioretention Surface Area
Drainage Area
Impervious Area
Rational C Coefficient
Size %
Inlet Velocity
Inlet flow depth
Depth to Ground Water
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If. REQUIRED ITEMS CHECKLIST
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(the soil layer down to 4 feet)
(the soil layer below 4 feet or below the sand bed)
Initial in the space provided to indicate the following design requirements have been met and supporting documentation is attached. If a
requirement has not been met, attach an explanation of why. At a minimum, a complete stormwater management plan submittal includes
a worksheet for each BMP, design calculations, plans and specifications shouting all BMPs and outlet structure details, a detailed
drainage plan and a fully executed operation and maintenance agreement. An incomplete submittal package will result in a request for
additional information and will substantially delay final review and approval of the project.
ADDlicants Initials
Nt--, No vertical sand bed is proposed
The bioretention area is at least 40 feet by 15 feet.
Sheet flow is provided at inlet.
Water table depth is greater than 6 feet.
Minimum of 6" ponding is provided.
The ponded area will draw down in less than 4 days.
Planting soil infiltration rate is greater than 0.52 in/hr.
The in-situ soil infiltration rate is greater than 0.2 in/hr.
A planting plan with species and densities is provided.
Mulch layer is specified in plans.
Planting soil meets minimum soil specifications (NCDENR Stormwater Best Management
Practices Manual, April 1999)
Plan details for the bioretention area provided.
Plan details for the inlet and outlet are provided.
An operation and maintenance agreement signed and notarized by the responsible party is provided.
Please note that underdrains beneath the planting soil are acceptable in the Piedmont and Mountains
TI3p - b b?
DIVISION OF WATER QUALITY - BIORETENTION AREA WORKSHEET
specify which basin this
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Soil & Environmental Consultants, PA
11010 Raven Ridge Road • Raleigh, North Carolina 27614 • Phone: [phone] • Fax: [phone]
www.SandEC.com
JOB NAME
SUBJECT

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Soil & Environmental Consultants, PA
11010 Raven Ridge Road • Raleigh, North Carolina 27614 • Phone: [phone] • Fax: [phone]
www.SandEC.com
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DWQ Project
DIVISION OF WATER QUALITY - BIORETENTION AREA WORKSHEET
I. PROJECT INFORMATION (please complete the following information).
Project Name : c ' 24 0i,51
Contact Person: paha"K Phone Number. - G7
For projects with multiple basins, specify which basin 'this worksheet applies to: L04 3
Permanent Pool Elevation ft. (elevation of the orifice invert out)
Temporary Pool Elevation T4? J2 ft. (elevation of the outlet structure invert in)
Bioretention Surface Area f ?-P sq. ft.
Drainage Area z-:!). GS ac.
Impervious Area d . 0- ac.
Rational C Coefficient
Size % ?- %
Inlet Velocity 7 -2-9, Q fps
Inlet flow depth '[31? in
Depth to Ground Water ft.
Planting Soil Infiltration Rate j= L
in./hr.
In-Situ Soil Infiltration Rate TA P in./hr.
(on-site and off-site drainage to the basin)
(on-site and off-site drainage to the basin)
(either 5% in w/sand under drain or 7% in w/o)
(the soil layer down to 4 feet)
(the soil layer below 4 feet or below the sand bed)
II. REQUIRED ITEMS CHECKLIST
Initial in the space provided to indicate the following design requirements have been met and supporting documentation is attached. If a
requirement has not been met, attach an explanation of why. At a minimum, a complete stormwater management plan submittal includes
a worksheet for each BMP, design calculations, plans and specifications showing all BMPs and outlet structure details, a detailed
drainage plan and a fully executed operation and maintenance agreement. An incomplete submittal package will result in a request for
additional information and will substantially delay final review and approval of the project.
ADDlicants Initials
///I--? No vertical sand bed is proposed
The bioretention area is at least 40 feet by 15 feet.
Sheet flow is provided at inlet.
Water table depth is greater than 6 feet.
Minimum of 6' ponding is provided.
The ponded area will draw down in less than 4 days.
7 17 Planting soil infiltration rate is greater than 0.52 in/hr.'
The in-situ soil infiltration rate is greater than 0.2 in/hr.
A planting plan with species and densities is provided.
Mulch layer is specified in plans.
Planting soil meets minimum soil specifications (NCDENR Stormwater Best Management
Practices Manual, April 1999)
Plan details for the bioretention area provided.
Plan details for the inlet and outlet are provided.
An operation and maintenance agreement signed and notarized by the responsible party is provided.
Please note that underdrains beneath the planting soil are acceptable in the Piedmont and Mountains
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333 Wade Ave., Raleigh, NC 27605
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51te and Vicinity Mapping and Data NORTH
Provided By: * Scale 111 = 301
John A. Edwards and Company PROPOSED IMPERVIOUS AREA
Con5ulting Engineers AI. WITHIN NEUSE RIPARIAN BUFFER
333 Wade Ave., Raleigh, NC 27605 LOT I - 33 5Q. FT.
Phone [phone] LOT 2 - I Go 5Q. FT. 30 15 0 30
Pax (919) 828-471 1 _ LOT 3 - 821 SQ. FT.
E-mail [e-mail] TOTAL - 10 14 50. FT. 16 A( * f
.__._------- ._..__-_---- _..______.?._-_.-_.._..__-_
PROJECT NO.: MAP 5OURCE: 5HEET TfTtE: -
9MG Preliminary Site Plan PROPOSED BUFFER IMPACT MAP
PROJECT MGR: Pry Q^
W? EIIP?lOIIII1CIIt? COI1S111t?1IItb? PA
DRAWN BY: 5CAlE: PROJECT NAME: OhM3F
CWD I' = 3a PACE STREET SUBDIVISION 11010 Raven Ridge Road • Raleigh, Nonh Carolina 27614
Phone: [phone] • Fax: [phone]
SHEET NO.: LOCATION: CNCNT: ?.Sandmwm j
FIGURE 5 WAKE COUNTY, NC JOHN A EDWARDS, AND COMPANY Jim-

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FOOTPRINT OF CURRENT HOUSE AND IMPERVIOUS SURFACES
rn Pace Street 5ubdlv151on - Zone I t 2 Footprint
3
Impervlou5 (5cf. ft.) PerviOU5 (5c1. ft.)
Zone 1 4 1 8.0 0
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Zone 2 778.0
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® Zone 2 - 778.0 5cf. ft.
Scale 1 20'
20 10 0 20

PROJECT NO.: AIAP 50URCE. 5n[ET TITLE
'2840,D I
PROJECT 6rCR. : Preliminary 51te Plan EXISTING FOOTPRINT-IMPACT MAP - - -
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SOu et $avil OIImCIItA)L Consultants, PA
DRA'NN ©Y:
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PACE 5TREET SUBDIVISION 11010 R"=Ridp Rood I.IA&hNomhQuolms27614
srntr ..v.: ?ocAnai: curer. P6om: (919) 6465900 Fes: (919)8469467
FIGURE 4 V.'Art COUNTY. ^lcRTN CAROLINA JOHN A. EDWARDS AND COMPANY - www3?C.oom
Soil & Environmental Consultants, PA
11010 Rzvca Ridgo hoed • Raleigh, North Carolina 27614 • f bo= (919) 546-39W - Fax: [phone]
www.S1uQW-.C=
AGENT AUTHORIZATION FORM
All Blanks To Be Filled In By The Current Landowner
,1?e-f
Name:-v1! ti-=-
'
Address:

Phone:

-- 01'7 Z.
Project Name/Description: ? S&EC Projcct 9
G `L' Plrt !'l0 23 "!'b l?RZ'?' 2S 3
Date:
The Department of the Army
U.S. Army Corps of Engineers, Wilmington District
P.O. Box 1890
Wilmington, NC 28402
Attn:
Field Office.
Re: Wetlands Related Consulting and Permitting
To Whom It May Concern:
I, the current rb e' owiuer, hereby designate and authorize Soil & Environmental Consultants, PA to act in my
behalf as my agent in the processing of permit applications, toflimish upon request supplemental information in
support of applications, etc. from this day forward. The 11 ¦ day of , 20co
This notification supersedes any previous correspondence concerning the agent for this project.
NOTICE: This authorization, for liability and professional courtesy reasons, is valid only for government
officials to enter the property when accompanied by S&EC staff. You ho call S arrange a site
meeting prior to visiting the site.
Print Property Owner's Name Property Owners ature
cc: Ms. Cyndi Karoly
NCDENR - DWQ
2321 Crabtree Boulevard
Raleigh, NC 27604
cc: Mr. Jason Payne
Soil & Environmental Consultants, PA
Charlotte Office: Greensboro 9 ice:
236 LcPhillip Court. Suite C 3817-E Lawndale Drive
Concord. NC 28025 Greensboro. NC 27455
Phone: [phone] Phone: [phone]
Fax' [phone] Fax: [phone]
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Project Mgr.: John A. Edwards & Co.
JP Wake County
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Project Manacjcr:
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Scale:
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Date:
I/ I G/OG
Map Title:
Figure 3 - Wake County
GIS Map
Legacy Construction Group, Inc.
Pace Street Subdivision
Wake County, NC
Sourcc:
Wake County GIS
Soil & Environmental Consultants, PA
11010 Raven Ridge Rd- Raley, NC 27614
[phone] • (919) 84;-9467
WO Pays: www.Sa,4EC.com
Q
° Soil & Environmental Consultants, E.A.
D Le C) C)
N.C. Division of Water Quality
401 Oversight and Express Pennits Unit
Attn: Cyndi Karoly
2321 Crabtree Boulevard, Suite 250 D
Raleigh, NC 27604-2260 v ?
FEe ?
RE: Response to the January 27 Request for More Information 2006
C?h`f? i
Pace Subdivision
Ralei1;gh, Wake County, , , North Carolina sCgf(?j 4UACf7-y
1,1It`RERt'?CH
11010 Raven Ridge Road Raleigh, North Carolina 27614 Phone: [phone] Fax: [phone]
www.SandEC.com
January 31, 2006
S&EC Project # 9840.W1
To Whom It May Concern:
On January 30, 2006, S&EC received a request for more information from your office
regarding DWQ Project No. 06-0098. The purpose of this letter is to provide information your office
requested in the correspondence. Specifically, the request asks that the applicant provide site plans
including the three bioretention areas.
I am enclosing a copy of the site plan you requested for your review. I am also copying Ian
McMillan (DWQ) and Eric Kulz (DWQ) with a copy of the same plan.
We feel this additional information addresses the requests you made and should be sufficient for
approval of the proposed impacts. Please contact me at this office or by e-mail
6payne(a)SandEC.com) with specific requests if further information is required.
Sincerely,
Jason Payne
Environmental Scientist
cc: Mr. Eric Kulz / NC-DWQ Raleigh Regional Office
Mr. Ian McMillan / NC-DWQ
Charlotte Office: Greensboro Office:
236 LcPhillip Court, Suite C 3817-E Lawndale Drive
Concord, NC 28025 Greensboro, NC 27455
Phone: [phone] Phone: [phone]
Fax: [phone] Fax: [phone]
PRELIMINARY DESIGN CALCULATIONS
& CONCEPT PLAN
03TORM WATER
BIORETENTION AREAS
WAKE COUNTY, NORTH CAROLINA
Prepared for:
John A. Edwards and Company
Pace Street Subdivision
Raleigh, NC 27606
January 11, 2006
S&EC Project No. 9840.D1
Patrick K. Smith, P
NC License No. 25
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Soil & Environmental Consultants, PA
11010 Raven Ridge Road • Raleigh, North Carolina 27614 • Phone: [phone] • Fax: [phone]
www.SandEC.com
Soil &. Environmental Consultants, PA
Pace Street Subdivision
Project Location
S&EC Projcct No. 9340.D1
January 11, 2006
The project is located within the City of Raleigh, in Wake County, NC. The property is
privately owned and consists of approximately 0.50 acres located on the south side of
Pace Street approximately 100 feet east of the intersection of Pace Street and Northeast
Street. See Figures 1, 2, and 3.
Storm Water Treatment
It is anticipated that the treatment of storm water runoff will be required by the Division
of Water Quality (DWQ) as part of the permitting requirements for impacts to the
existing buffers associate with the proposed residential development project. Current
plans call for the demolition of the existing structure and subdividing two existing lots
into three separate lots containing three separate residences. A significant portion (over
50%) an the existing structure and an attached deck are located within the buffer (Zones 1
and 2). See Figure 4. The overall footprint of the proposed structures as shown in
Figure 5 provides for a significant reduction of overall buffer impacts in Zone 1.
The concept plan calls for the construction of a single Bioretention Area to be located on
each individual property. These bioretention areas will serve to treat storm water runoff
associated with the proposed impervious area including roof, road, sidewalks, porches,
and driveways. We understand that a storm water collection and drainage system will be
designed, and installed during site grading and building construction operations, to
convey a significant portion of site drainage to each proposed treatment device.
Depending on site conditions and future drainage design (by others) more than one
bioretention area inay be necessary.
Our preliminary evaluation of this feature has included device sizing for the removal of
Total Suspended Solids (TSS) reduction in accordance with generally accepted practice
as outlined in the North Carolina Department of Environment and Natural Resources
(NCDENR), Division of Water Quality (DWQ), Best Management Practices (BMP)
Manual and other applicable references.
Total Suspended Solids (TSS) and Total Nitrogen (TN) Removal
The BMP manual outlines design requirements necessary to meet the pollutant removal
design standard of 85 percent removal of Total Suspended Solids (TSS). Based on the
BMP manual, a bioretention area is assumed to have a TSS removal efficiency of 85
percent. Sized appropriately one or more bioretention areas will meet the removal
requirements for the proposed residence and assorted other site impervious areas.
Constructed properly, bioretention areas also contribute significantly to the removal of
Total Nitrogen. According to the Draft BMP Stonnwater Manual from the N.C. Division
of Water Quality (DWQ), dated July 2005, and "Updates to Stormwater BMP
Efficiencies" Memo from DWQ, dated September 8, 2004, bioretention areas are
I of4
Soil & Environmental Consultants, PA
Pace Street Subdivision
S&EC Projcct No. 9840.131
January 11, 2006
currently considered to remove 35 percent of the TN from storm water inflow. And
although it is our understanding that no formal nitrogen removal evaluation is necessary,
the use of bioretention areas will clearly provide considerable benefits to the quality of
the surface water reaching the receiving watercourse.
Bioretention Area Planning & Design
Preliminary calculations for the sizing of the total footprint of the bioretention areas have
been performed. All necessary preliminary storm water design calculations and
supporting documentation are attached.
From available topographic data (site topographic data provided by John A. Edwards &
Company and site observations, the total drainage area for Lots 1, 2, and 3 are estimated
at 5,675 square feet (0.13 acres), 3,998 square feet (0.092 acres), and 3,277 square feet
(0.08 acres), respectively. Considering a distribution of the site land usage between
impervious area, maintained lawn, and forested areas, we estimated weighted Rational
Coefficients for each lot. Using the methods described in the BMP Manual we
detennined required bioretention surface areas needed to treat site runoff (assuming 7% -
no sand bed). These areas can be separated into one or more specific treatment areas if
appropriate. Whenever possible minimum length, width, and length to width ratios (and
other sizing criteria) as described in the BMP manual will be met or exceeded during
final design.
For planning purposes we have recommended that the Owner consider a total
construction area of 1.5 times the design surface area footprint required for the proposed
bioretention areas. These areas will be integrated into the site landscaping plan to
provide the desired appearance. We have attached the required DWQ Worksheet for the
proposed bioretention areas for the proposed site development. The following table
provides a summary of our preliminary design results:
Weighted Required Recommended
Lot # / Drainage Area Bioretention Construction
Cell # sq.ft. (ac.) Rational Cell Area Area
Coefficient
(sq. ft.) (sq. ft.)
1 5,675 (0.12) 0.72 285 428
2 3,998 (0.092) 0.69 200 300
3 3,277 (0.08) 0.71 170 255
Preliminary plans call for discharges from Cell 1 to be released into a level spreader
device located outside of Zone 2 of the buffer to allow for diffuse flow. Cells 2 and 3 are
proposed to discharge into the existing storm drainage system along Pace Street. Based
2 of 4
Soil & Environmental Consultants, PA S&EC Project No. 9840.D1
Pace Street Subdivision January 11, 2006
on our discussion with the Division of Water Quality, we understand that once treated for
TSS storm water from a bioretention area can be discharged directly into the receiving
watercourse (in this case the immediately adjacent stream). However, it should be noted
that if done, this discharge must be made in a non-erosive fashion.
Once approval of this Concept Plan is received and the buffer variance is granted, a Final
Design including detailed Construction Drawings and Technical Specifications will be
prepared. The exact location and dimension for each bioretention area will be described
in detail in the final construction documents. Detailed design of the bioretention area(s)
to include but not limited to inflow distribution, treatment soil characteristics, plant
species, ponding depth, outlet structure sizing, and feature elevations will be determined
during Final Design. Certain planning assumptions have been made with regard to the
proposed discharge points. These assumptions will be confirmed during Final Design
and, if necessary, plans will be modified to meet regulatory requirements. An Operations
and Maintenance (O&M) Agreement will also be prepared at that time.
3 of 4
Soil & Environmental Consultants, PA
Pace Street Subdivision
List of Attachments and Figures
Attachments:
Preliminary Storm Water Calculations
Division of Water Quality Bioretention Area Worksheet
Breakdown of Square Footage of Existing and Proposed Houses
Figures:
Figure 1 - USGS Topographic Map
Figure 2 - Soil Survey Map
Figure 3 - Overall Site Development Plan
Figure 4 - Footprint of Current House and Impervious Surfaces
Figure 5 - Proposed Buffer Impact Map
S&EC Project No. 9840.D1
January 11, 2006
6 pages
3 pages
1 page
4 of 4
JOB NO.
Soil & Environmental Consultants, PA SHEET OF
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Soil & Environmental Consultants, PA SHEET 7 OF C
11010 Ra% -en Ridge Road • Raleigh, North Carolina 27614 • Phone: [phone] • Fax: [phone] DATE 1 n D
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DWQ Project No
DIVISION OF WATER QUALITY • BIORETENTION AREA WORKSHEET
1. PROJECT INFORMATION (please complete the following information):
Project Name : Pa f ?- s!f ,' T ; -fl , yr
Contact Person: '.=r'? C ' ,:` a :t+l t , 1'c;" Phone Number: (r/%%) err(/ -
For projects with multiple basins, specify which basin this worksheet applies to: r?- I
Permanent Pool Elevation ft. (elevation of the orifice invert out)
Temporary Pool Elevation ft. (elevation of the outlet structure invert in)
Bioretention Surface Area `i sq. ft.
Drainage Area 13 ac. (on-site and off-site drainage to the basin)
Impervious Area n , d9 ac. (on-site and off-site drainage to the basin)
Rational C Coefficient M ';A e4 l
Size % % (either 5% in w/sand under drain or 7% in w/o)
Inlet Velocity 'i l1 fps
Inlet flow depth T I?D in
Depth to Ground Water TPrP ft.
Planting Soil Infiltration Rate in./hr. (the soil layer down to 4 feet)
In-Situ Soil Infiltration Rate
r,
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11. REQUIRED ITEMS CHECKLIST
Initial in the space provided to indicate the following design requirements have been met and supporting documentation is attached. If a
requirement has not been met, attach an explanation of why. At a minimum, a complete stormwater management plan submittal includes
a worksheet for each BMP, design calculations, plans and specifications showing all BMPs and outlet structure details, a detailed
drainage plan and a fully executed operation and maintenance agreement. An incomplete submittal package will result in a request for
additional information and will substantially delay final review and approval of the project.
Aoolicants Initials
VW 3 No vertical sand bed is proposed
The bioretention area is at least 40 feet by 15 feet.
Sheet flow is provided at inlet.
Water table depth is greater than 6 feet.
Minimum of 6" ponding is provided.
The ponded area will draw down in less than 4 days.
h Planting soil infiltration rate is greater than 0.52 in/hr.
The in-situ soil infiltration rate is greater than 0.2 in/hr.
A planting plan with species and densities is provided.
Mulch layer is specified in plans.
Planting soil meets minimum soil specifications (NCDENR Stormwater Best Management
Practices Manual, April 1999)
Plan details for the bioretention area provided.
Plan details for the inlet and outlet are provided.
An operation and maintenance agreement signed and notarized by the responsible party is provided.
Please note that underdrains beneath the planting soil are acceptable in the Piedmont and Mountains
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www.SandEC.com
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1. PROJECT INFORt
Project Name :
Contact Person: _
For projects with multiple
Permanent Pool Elevation
Temporary Pool Elevation
Bioretention Surface Area
Drainage Area
Impervious Area
Rational C Coefficient
Size %
DIVISION OF WATER QUALITY - BIORETENTION AREA WORKSHEET
TION (please completq the followi
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ft.
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Inlet Velocity
Inlet flow depth
Depth to Ground Water
Planting Soil Infiltration Rate
In-Situ Soil Infiltration Rate
II. REQUIRED ITEMS CHECKLIST
information):
Phone Number
feet applies to: II o4-
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(the soil layer below 4 feet or below the sand bed)
Initial in the space provided to indicate the following design requirements have been met and supporting documentation is attached. If a
requirement has not been met, attach an explanation of why. At a minimum, a complete stormwater management plan submittal includes
a worksheet for each BMP, design calculations, plans and specifications showing all BMPs and outlet structure details, a detailed
drainage plan and a fully executed operation and maintenance agreement. An incomplete submittal package will result in a request for
additional information and will substantially delay final review and approval of the project.
Applicants Initials
No vertical sand bed is proposed
The bioretention area is at least 40 feet by 15 feet.
Sheet flow is provided at inlet.
Water table depth is greater than 6 feet.
Minimum of 6" ponding is provided.
The ponded area will draw down in less than 4 days.
Planting soil infiltration rate is greater than 0.52 in/hr.
The in-situ soil infiltration rate is greater than 0.2 in/hr.
A planting plan with species and densities is provided.
Mulch layer is specified in plans.
Planting soil meets minimum soil specifications (NCDENR Stormwater Best Management
Practices Manual, April 1999)
Plan details for the bioretention area provided.
Plan details for the inlet and outlet are provided.
An operation and maintenance agreement signed and notarized by the responsible party is provided.
Please note that underdrains beneath the planting soil are acceptable in the Piedmont and Mountains
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DIVISION OF WATER QUALITY - BIORETENTION AREA WORKSHEET
1. PROJECT INFORMATION (please complete the following information):
Project Name <_, .)A I}1
Contact Person: h 1 Phone Number: r rte:? - : ?`
For projects with multiple basins, specify which basin this worksheet applies to: L 043
Permanent Pool Elevation ft. (elevation of the orifice invert out)
Temporary Pool Elevation ft. (elevation of the outlet structure invert in)
Bioretention Surface Area 1:;y> sq. ft.
Drainage Area e?:) . GS ac.
Impervious Area O . 05; ac.
Rational C Coefficient fl. 7 f
Size % ?- %
Inlet Velocity
T,l? fps
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Depth to Ground Water 1'ta 12 ft.
Planting Soil Infiltration Rate 'I in./hr.
In-Situ Soil Infiltration Rate - ? in./hr.
(on-site and off-site drainage to the basin)
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l
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(the soil layer down to 4 feet)
(the soil layer below 4 feet or below the sand bed)
11. REQUIRED ITEMS CHECKLIST
Initial in the space provided to indicate the following design requirements have been met and supporting documentation is attached. If a
requirement has not been met, attach an explanation of why. At a minimum, a complete stormwater management plan submittal includes
a worksheet for each BMP, design calculations, plans and specifications showing all BMPs and outlet structure details, a detailed
drainage plan and a fully executed operation and maintenance agreement. An incomplete submittal package will result in a request for
additional information and will substantially delay final review and approval of the project.
A lican Ini ' Is
No vertical sand bed is proposed
V__An operation and maintenance agreement signed and notarized by the responsible party is provided.
Please note that underdrains beneath the planting soil are acceptable in the Piedmont and Mountains
The bioretention area is at least 40 feet by 15 feet.
Sheet flow is provided at inlet.
Water table depth is greater than 6 feet.
Minimum of 6" ponding is provided.
The ponded area will draw down in less than 4 days.
T _ U Planting soil infiltration rate is greater than 0.52 in/hr.'
The in-situ soil infiltration rate is greater than 0.2 in/hr.
A planting plan with species and densities is provided.
Mulch layer is specified in plans.
Planting soil meets minimum soil specifications (NCDENR Stormwater Best Management
Practices Manual, April 1999)
Plan details for the bioretention area provided.
Plan details for the inlet and outlet are provided.
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Pace Street Subdivision a Soil & Environmental Consultants, PA
Project Mgr.: John A. Edwards & Co. 11010 Raven Ridge Rd.- Raleigh, NC 27614
JP Wake County, NC ??(g1?9 14&5900 - (919) 84G-9407
f.l J e: mvw3andEC.com
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9840.W1 Soil & Environmental Consultants, PA
---- - Pace Street Subdivision 4
Project Mgr.: John A. Edwards & Co. 11111Raven Ridge Rd.• Raleigh, NC 27614
JP? D r?,91 j 84E # 19t?846 9467
Wake County, NC ?V?/6p9e-wt? VEC.com
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Provided By:
John A. Edwards and Company
Con5ultmg Engineers
333 Wade Ave., Raleigh, NC 27605
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PROJECT NO.; MAP 50UPLE: 5hEET TRLE:
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PROJECT MGR.: Preliminary 51te Plan EXISTING FOOTPRINT-IMPACT MAP
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LnLLT 1I0.: LOCATION: CLIENT: Fboox(919)646-5900 • Fa: (919) 8469467
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Provided By:
Scale 11 = 301
John A. Edwards and Company
Consulting Engineers PROPOSED IMPERVIOUS ARFA
AL WITHIN NEUSE RIPARIAN BUFFER
333 Wade Ave., Raleigh, NC 27605 LOT I - 33 5Q. FT.
Phone [phone] LOT 2 - I GO 5Q. FT.
30
15 0 30
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LOT 3 - 82150. Ff.
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PROJECT NO, MAP 50UFZE: 5NECT WILE:
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DRAWN BY. SCALE: PROJECT NAME:

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1' = 30

PACE STREET SUBDIVISION
1101 aAoad Ralcgh North Carol na 27614
0 Raven Rid
Fho=(919)P6.5900 • F=(919)&169467
411
SnEET NO .: LOCATION; CUCNi: -SandLC.com
FIGURE 5 WAKE COUNTY, Nc JOHN A EDWARDS AND COMPANY - __1 1 I
FEE-01-2006(WED) IL 24
MATT & WEND'Y BLANHINSHIP
507 South 4'' Street - Mebane. NC - 27302 - (919).304-5165
February 1, 2006 -Via fax: [phone]
Ms. Cyndi Karoly
Supervisor
NC DFNR Division of Water Quality
Wetlands /401 Unit
2321 Crabtree Boulevard, Suite 250
Raleigh, NC 27604
RE: 506 / 50S Pace Street
DWQ Project 0 06-0095
Dear Ms. Karoly:
I am writing; to respond to your letter of 1/27/06, regarding the Pace Street Subdivision (DWQ prt ject #
06-0098).
in your letter and request for additional information, you requested site plans including the three
bioretention areas. It is my understanding that Jason Payne with Soil & Environmental Consultants has
contacted your office and is forwarding the additional information requested.
As requested, I am writing to verify that your letter of 1/27/06 was received, tmd to indicate that we are
still interested in pursuing permitting for the property. I have also contacted Tan McMillan by phone to
indicate that we will be responding with the information requested.
if you have tuiy questions, you can contact me as follows:
Office: [phone]
Cell: [phone]
Home: [phone]
Sincer 1, - i
Matt 131mikan. ip
TAB
P. 001/1301
FEB-I-2006 t1ED 1-4:20 TEL:[phone] t1AHE:DI4_-HETLAtIDS P. 1'
' of W Alf9
O? QG
Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E. Director
Division of Water Quality
January 27, 2006
DWQ Project # 06-0098
Wake County
Page 1 of 2
CERTIFIED MAIL: RETURN RECEIPT REQUESTED
Mr. Matthew E. Blankinship
507s.4 1h Street
Mebane, NC 27302
Subject Property: Matthew E. Blankinship - Pace Street Subdivision
Ut to Cemetary Branch [030402, 27-33-18-2, C, NSW]
REQUEST FOR MORE INFORMATION
Dear Mr. Blankinship:
On January17, 2006, , the Division of Water Quality (DWQ) received your application dated
January 16, 2006, to impact 1,172 square feet (ft) of protected riparian buffers to construct the
proposed residential subdivision. The DWQ has determined that your application was
incomplete and/or provided inaccurate information as discussed below. The DWQ will require
additional information in order to process your application to impact protected wetland, streams
and/or buffers on the subject property. Therefore, unless we receive the additional information
requested below, we will have to move toward denial of your application as required by 15A
NCAC 2H .0506 and 2B .0233(8) and will place this project on hold as incomplete until we
receive this additional information. Please provide the following information so that we may
continue to review your project.
Additional Information Requested:
1. Please provide site plans including the three (3) proposed bioretention areas.
Please contact the DWQ within three weeks of the date of this letter to verify that you have
received this letter and that you remain interested in continuing to pursue permitting of your
project and will be providing the DWQ the requested information at a later date. Please contact
me in writing and Eric Kulz of the DWQ Raleigh Regional Office. If we do not hear from you
within three weeks, we will assume that you no longer want to pursue this project and we will
consider the project as withdrawn.
401 OversighVExpress Review Permitting Unit
1650 Mail Service Center, Raleigh, North Carolina 27699-1650
2321 Crabtree Boulevard, Suite 250, Raleigh, North Carolina 27604
Phone: [phone] / FAX [phone] / Internet: httn://l12o.enr.state,nc.tis/ncwetiands
NOf Carolina
Ntimally
An Equal Opportunity/Affirmative Action Employer- 50% Recycled/10% Post Consumer Paper
Mr. Matthew E. Blanenship
Page 2 of 2
January 27, 2006
This letter only addresses the application review and does not authorize any impacts to wetlands,
waters or protected buffers. Please be aware that any impacts requested within your application
are not authorized (at this time) by the DWQ. Please call Ms. Ian McMillan at 919-733-1786 if
you have any questions regarding or would like to set up a meeting to discuss this matter.
Sincerely,
ICat-T4
Cyndi Karoly, Supervisor
401 Oversight/Express Review Permitting Unit
CBK/ijm
cc: Eric Kulz, DWQ Raleigh Regional Office
USACE Raleigh Regulatory Field Office
File Copy
Central Files
Jason Payne, Soil & Environmental Consultants, P.A., 11010 Raven Ridge Road,
Raleigh, NC 27614
Filename: 060098BIankinshipPaceStSD(1Vake)On_llold
DWQ # 06-0098 Matthew Blankinship Pace St S/D
Subject: DWQ # 06-0098 Matthew Blankinship Pace St S/D
From: Laurie Dennison <[e-mail]>
Date: Mon, 30 Jan 2006 15:35:14 -0500
To: [e-mail]
Please see attached the Division of Water Quality's request for more information
related to your recent application. Please note that this message is being forwarded
to you electronically so that you may expedite preparation of your response. Please
do not send your response as a reply to this e-mail or via fax. The hard copy is
being sent via US Mail. All response correspondence is to be mailed via hard copy to
the 401 Oversight and Express Permits Unit, 2321 Crabtree Blvd., Raleigh, NC, 27604
unless otherwise noted.
060098B1ankinshipPaceStSD(Wake)On_Hold.doe Content-Type: application/msword
Content-Encoding: base64
1 of 1 1/30/2006 3:35 PM
Triage Check List
Date: .??n.

Projett Name: G ?P
DWQ#: a oo ?, 6 6 ?g
County: W Off-
To: ? ARO Kevin B arnett ? WaRO
? FRO Ken Averitte ? WiRO
? MRO Alan Johnson,,// ? WSRO
RRO ZvEkz ?n klbn
Tom Steffens and Kyle Barnes
Noelle Lutheran
Daryl Lamb
From: ,,rvt Telephone : (919)
The file attached. Is being forwarded?i . our for your evaluation.
'Please call if you need,al'stance.
? Stream length impacted. '?
? Stream determination
? Wetland determination and distance to blue-lips surface,waters on USFW topo maps
? Minimi ation/avoidanceissues
? BufferRules'(Neuse, Tar-Pamlico, Catawba, Randleman)
? Pond till
? Mitigation Ratios
? Ditching
? Are the stream and or wetland mitigation sites available and viable?
? Check drawings for accuracy
? Is the application consistent with pre-application meetings? -
? Cumulative impact concern
V D\c G\f\JCSz?
Comments:
SG1?
412
rn?i
--------------------

TECHNICAL SPECIFICATIONS
FOR
PACE STREET SUBDIVISION
STORMWATER BIORETENTION AREAS
WAKE COUNTY, NORTH CAROLINA
S&EC Project No. 9840.D2
SEPTEMBER 2006
S EP 8 2006
,,Illllltllfl////? -
4- ?'A
Patrick K. Smith, P.E.
oq 1 ??' moo`'
NC License No. 25525,
`?""'apoWl?
Soil & Environmental Consultants, PA
11010 Raven Ridge Road • Raleigh, North Carolina 27614 • Phone: [phone] • Fax: [phone]
www.SandEC.com
TECHNICAL SPECIFICATIONS TABLE OF CONTENTS
SECTION I -GENERAL REQUIREMENTS 1 4.3 UTILITY LOCATION AND PROTECTION
1.1 SECTION INCLUDES 1 4.4 SEDIMENTATION AND EROSION CONTROL
1.2 SUMMARY OF WORK 1 4.5 CONSTRUCTION LAYOUT
1.3 WORKFORCE EXPERIENCE 1 4.6 CLEARING, GRUBBING, AND STRIPPING
1.4 MEASUREMENT AND PAYMENT 1 4.7 DEWATERING
SECTION 2 -TEMPORARY FACILITIES 1 SECTION 5 - EXCAVATION
2.1 SECTION INCLUDES 1 5.1 SECTION INCLUDES
2.2 MEASUREMENT AND PAYMENT 1 5.2 MEASUREMENT AND PAYMENT
2.3 TEMPORARY SANITARY FACILITIES 1 5.3 REFERENCES
2.4 TRAFFIC CONTROL 1 5.4 PREPARATION
2.5 STAGING AREA 1 5.5 EXCAVATING
2.6 COORDINATION WITH OWNER 1 5.6 PLANTING PREPARATION
2.7 PROTECTION OF EXISTING FACILITIES, 5.7 TOLERANCES
STRUCTURES, AND SERVICES 2 SECTION 6 - FILLING, BACKFILLING AND COMPACTION
2.8 PROTECTION OF INSTALLED WORK 2 6.1 SECTION INCLUDES
2.9 PROGRESS CLEANING AND WASTE REMOVAL 2 6.2 MEASUREMENT AND PAYMENT
2.10 FINAL CLEANING 2 6.3 REFERENCES
SECTION 3 - QUALITY CONTROL 2 6.4 FILL MATERIALS
3.1 SECTION INCLUDES 2 6.5 PREPARATION
3.2 MEASUREMENT AND PAYMENT 2 6.6 BACKFILLING, FILLING, AND SURFACE
3.3 REFERENCES 2 PRE PARATION
3.4 CONSTRUCTION OBSERVATION 2 6.7 COMPACTION
3.5 PLANTING OBSERVATION 2 6.8 PROTECTION OF FINISHED WORK
SECTION 4 - SITE PREPARATION 3 6.9 TOLERANCES
4.1 SECTION INCLUDES 3 SECTION 7 - OUTLET CONTROL STRUCTURE
4.2 MEASUREMENT AND PAYMENT 3 7.1 SECTION INCLUDES
3
3
3
3
3
4
4
4
4
4
4
4
4
5
5
5
5
5
5
5
5
5
5
6
6
i
7.2 MEASUREMENT AND PAYMENT 6
7.3 REFERENCES 6
7.4 MATERIALS 6
7.5 PRECAST CONCRETE RISER 6
7.6 OUTLET BARREL 6
7.7 UNDERDRAIN COLLECTION SYSTEM 7
7.8 SUBMITTALS 8
SECTION 8 - BIORETENTION AREA PLANTING 8
8.1 SECTION INCLUDES 8
8.2 MEASUREMENT AND PAYMENT 8
8.3 REFERENCES 8
8.4 GENERAL 8
8.5 PLANT SUBSTITUTION 8
8.6 PLANTING PREPARATION 9
8.7 CONTAINER GROWN PLANTS 9
8.10 PLANTING PERIODS 9
8.11 SUBMITTALS 9
SECTION 9 - PERMANENT SEEDING 10
9.1 SECTION INCLUDES 10
9.2 MEASUREMENT AND PAYMENT 10
9.3 REFERENCES 10
9.4 GENERAL 10
9.5 SEEDBED PREPARATION 10
9.6 SEEDING 10
9.7 SEEDING DATES 10
9.8 SOIL AMENDMENTS 10
9.9 MULCH 10
SECTION 10 - SEDIMENT AND EROSION CONTROL
10.1 SECTION INCLUDES
10.2 MEASUREMENT AND PAYMENT
10.3 REFERENCES
10.4 MATERIALS
10.5 SILT FENCE
10.6 INSTALLATION OF EROSION CONTROL
MAT TING
SECTION 11 - SITE MAINTENANCE
11.1 SECTION INCLUDES
11.2 MEASUREMENT AND PAYMENT
11.3 EXECUTION
ii
12
13
13
13
13
SECTION 1 -GENERAL REQUIREMENTS
1.1 SECTION INCLUDES
General requirements and information,related to the work including,
summary of work, measurement and payment, and reference to
SPECIAL CONTRACT PROVISIONS (if applicable based on
contractual agreement(s) between Owner and Contractor).
1.2 SUMMARY OF WORK
The PACE STREET SUBDIVISION STORMWATER
BIORETENTION AREAS project consists of the earthwork and
construction of a series of three (3) stormwater biorctention areas, and
planting of each of these three devices. Refer to the Construction
Drawings and to these Specifications for project details.
1.3 WORKFORCE EXPERIENCE
The Contractor is required to have the appropriately experienced
personnel on site to operate equipment and insure that the construction
sequence and installation procedures are followed as determined by the
Engineer. Contractor personnel should be familiar with general
grading, pipe installation procedures, and landscape planting methods..
1.4 MEASUREMENT AND PAYMENT
All measurement and payment for services performed shall be as
indicated in the SPECIAL CONTRACT PROVISIONS if applicable.
As such, they are not defined in these Technical Specifications.
END OF SECTION
SECTION 2 -TEMPORARY FACILITIES
2.1 SECTION INCLUDES
Required temporary facilities including site access, temporary sanitary
facilities, barriers, traffic control, construction staging area, protection
of existing facilities and installed work, erosion control measures, and
general site cleaning.
2.2 MEASUREMENT AND PAYMENT
See SPECIAL CONTRACT PROVISIONS if applicable.
2.3 TEMPORARY SANITARY FACILITIES
Provide and maintain required sanitary facilities and enclosures. No
permanent sanitary facilities exist at the project site.
2.4 TRAFFIC CONTROL
Provide traffic control as required to protect the public safety.
Conform to all requirements of State, County, City, or local laws and
requirements for traffic control. Conformance with contract documents
does not relieve the Contractor from responsibility for public safety.
2.5 STAGING AREA
Areas will be designated on the site for staging of Contractor's
equipment and construction materials for the duration of construction.
These areas shall be maintained so as to provide a sightly appearance
and a safe working environment. No other areas shall be used for this
purpose without the approval of the Owner and Engineer.
Storage of oil or fuel shall be confined to the construction staging
areas. Refueling of all vehicles and equipment shall occur only in the
staging areas. Refueling of non-mobile equipment located outside of
the staging areas will be allowed with Engineer approval. No refueling
shall occur within fifty feet of any excavation, the stream channel or
any other surface water or wetland. The Contractor shall take
appropriate measures to ensure safe fueling procedures are followed.
Contractor shall provide appropriate spill prevention measures. The
Contractor shall provide a spill containment plan for both the staging
areas and the construction area. The plan shall include prevention,
containment, and control of fuel or oil spillage from equipment storage,
refueling, maintenance, and operation on site. The plan shall address
both mobile and non-mobile equipment used during construction.
Emergency spill cleanup equipment for oil and fuel spills shall be
stored on site. The Contractor shall notify the Owner and all applicable
agencies within 24 hours of any spill.
2.6 COORDINATION WITH OWNER
Perform coordination with Owner and schedule work to ensure limited
disruption of daily operations of Owner. Obtain approval from Owner
prior to the disruption of any access to site utilities, structures, or
locations. Coordinate the disruption of any utility services without
regard to duration. Provide continuous representation/point of contact
for Owner during all site activities. Coordinate for access to
construction site to reduce the potential for disruption to Owner.
Access to construction site shall be limited to the entrance designated
S&EC Project No. 9840.D2 Page I Teclmical Specifications
Pace Street Subdivision Stormwater Bioretention Areas September 2006
on the plans. Only access points approved by the Owner shall be used
during construction.
2.7 PROTECTION OF EXISTING FACILITIES, STRUCTURES,
AND SERVICES
The project vicinity to include existing access routes will continue to be
used for daily operations by Owner throughout the duration of
construction. The Contractor shall protect existing facilities, structures,
and services throughout the duration of construction and provide
special protection where specified in individual specification sections.
Provide temporary and removable protection for existing structures and
services where necessary.
Control activity in immediate vicinity of facilities, structures, and
services to prevent damage. Any facility, structure, or services
disturbed or damaged, either intentionally or unintentionally, shall be
removed and reinstalled or repaired to the Owner's satisfaction.
Repairs to or replacement of facilities, structures, or services shall be
performed at the expense of the Contractor. Repairs and/or
replacement shall occur without additional cost to the Owner.
2.8 PROTECTION OF INSTALLED WORK
Protect installed work and provide special protection where specified in
individual specification sections. Provide temporary and removable
protection for installed work and products. Control activity in
immediate work area to prevent damage. Any installed work disturbed
or damaged, shall be removed and reinstalled or repaired to the
Engineer's satisfaction. Repairs to or replacement of installed work
shall be performed at the expense of the Contractor. Repairs and
replacement shall occur without additional cost to the Owner.
2.9 PROGRESS CLEANING AND WASTE REMOVAL
Maintain areas free of waste materials, debris, and rubbish. Maintain
site in a clean and orderly condition. Collect and remove waste
materials, debris, and rubbish from site daily and dispose off site.
Remove temporary utilities, equipment, facilities, and materials prior to
Final Application for Payment inspection. Restore existing facilities
used during construction to original condition.
2.10 FINAL CLEANING
Execute final cleaning prior to final project walkthrough with
Agencies, Client, and Engineer. Clean site and all installed work.
Remove waste and surplus construction materials, rubbish, temporary
sanitary, and construction facilities from the site.
END OF SECTION
SECTION 3 - QUALITY CONTROL
3.1 SECTION INCLUDES
Observation of construction and planting operations.
3.2 MEASUREMENT AND PAYMENT
See SPECIAL CONTRACT PROVISIONS if applicable.
3.3 REFERENCES
For products or workmanship spccif led by association, trade, or other
consensus, comply with requirements of the standard, except when
more rigid requirements are specified or are required by applicable
codes.
Section 8 (Bioretention Area Planting) of these Specifications.
3.4 CONSTRUCTION OBSERVATION
The Owner has engaged the Engineer of his representative to
periodically observe construction operations as required in these
Specifications. Observation of construction operations does not relieve
Contractor of obligation to perform work to contract requirements. The
Contractor shall allow observation personnel access to materials, and
the construction site as required.
3.5 PLANTING OBSERVATION
The Owner has engaged the Engineer or his representative to observe
planting operations as required in these Specifications. Observation of
planting operations does not relieve Contractor of obligation to perform
work to contract requirements. The Contractor shall allow observation
personnel access to materials (see Section 8), and the construction site
as required.
END OF SECTION
S&EC Project No. 9840.D2 Page 2 Technical Specifications
Pace Street Subdivision Stormwater Bioretention Areas September 2006
SECTION 4 - SITE PREPARATION
4.1 SECTION INCLUDES
Site preparation shall consist of utility location and protection, clearing,
grubbing and stripping of the work area, and construction of any
required temporary construction access routes and temporary sediment
and erosion control measures.
4.2 MEASUREMENT AND PAYMENT
See SPECIAL CONTRACT PROVISIONS if applicable.
4.3 UTILITY LOCATION AND PROTECTION
The Contractor shall locate or arrange for the location of all existing
utilities and mark for identification. Contractor shall provide means for
protecting utilities from any damage during site work. Rcpair of
damaged utilities shall be at Contractor's expense. Coordination
should be made with Owner to locate and mark site specific utilities.
NC ONE CALL (1-800-632-4949)
4.4 SEDIMENTATION AND EROSION CONTROL
The Engineer has assumed the overall disturbed acreage of this project
will be less than 0.5 acres and that the site contractor will be
responsible for the installation, inspection, repair, and supplementation
of all erosion control measures. Contractor shall be responsible for
preventing erosion on the site and sedimentation off the site. Methods
shall be employed as recommended in the North Carolina Erosion and
Sediment Control Planning and Design Manual, latest edition.
At a minimum, these temporary erosion and sediment control measures
as described in Section 10 (Sediment and Erosion Control) shall be
installed. The Contractor shall conform to all the rules, regulations,
laws, and ordinances of the State of North Carolina, and of all other
authorities having jurisdiction.
4.5 CONSTRUCTION LAYOUT
e
1
The Contractor is responsible for the construction surveying and
layout. The maintenance and preservation of the construction stakes is
the responsibility of the Contractor. The replacement of damaged or
disturbed construction stakes or supplemental staking will be the
Contractor's responsibility. The Contractor is required to have a laser
level or other equivalent equipment available on site during the entire
period of construction to check graddelevations as construction
progresses.
4.6 CLEARING, GRUBBING, AND STRIPPING
Conform to applicable code for environmental requirements, disposal
of debris, and erosion and sedimentation control as described above.
Coordinate clearing work with utility Owners and operators as
described above. Establish a schedule for daily removal of debris from
the site. Debris may not be stockpiled on site. Clear areas required for
access to site and execution of work. Remove trees, stumps, other
wood, metal, or rubble debris within work areas.
Remove stumps, main root ball, and all roots with a diameter greater
than 2 inches. Leave area in a clean and neat condition. Grade site
surface daily to control the direction of channelized flow and prevent
free standing surface water.
In areas where grading will be implemented, the existing top six inches
of soil should be removed and stockpiled prior to excavation or
construction efforts.
4.7 DEWATERING
Comply with all rules, regulations, laws, and ordinances of the State of
North Carolina, and of all other authorities having jurisdiction.
Provide without additional cost to the Owner all labor, materials,
equipment, and services necessary to make the work comply with such
requirements. Install all barriers, erosion and sedimentation control,
silt fences, turbidity curtains, and other measures as required to prevent
off-site sedimentation.
Under no circumstances shall fill or other construction materials be
placed in excavations containing standing water without approval of
the Engineer.
END OF SECTION
S&EC Project No. 9840.D2 Page 3 Teclmical Specifications
Pace Street Subdivision Stormwater Bioretention Areas September 2006
SECTION 5 - EXCAVATION
5.1 SECTION INCLUDES
Provide all necessary equipment and labor to excavate for construction
of stormwater bioretcntion areas as shown on the Drawings without
damage or interruption of utility service.
5.2 MEASUREMENTANDPAYMENT
See SPECIAL CONTRACT PROVISIONS if applicable.
5.3 REFERENCES
Occupational Safety and Health Administration - Construction
Standards for Excavations, 29 CFR Part 1926.650-.652.
When the Specifications or Drawings differ from the requirements of
the above-referenced documents, the more stringent requirements shall
apply.
5.4 PREPARATION
Locate, identify, and protect utilities from damage as described in
Section 4.3. Notify utility companies and coordinate for and/or install
protection of utilities where necessary.
5.5 EXCAVATING
Protect all utilities and structures that may be damaged by excavating
work. In areas where grading will be implemented, the existing top six
inches of soil should be removed and stored prior to construction or
reconstruction efforts. Excavated areas shall be constructed to line,
slope, and dimension described in the Drawings. Boundaries of graded
areas will be graded such to form a smooth blended interface with the
surrounding ground surface.
Excavate subsoil to accommodate bioretention areas, and other site
grading as shown on the Drawings. Perform Work in accordance with
Occupational Safety and Health Administration (OSHA) - Construction
Standards for Excavations, 29 CFR Part 1926.650-.652. Provide
trench and excavation protection as required. Slope banks with
machine to stable slope or flatter until shored. Grade top perimeter of
excavation to prevent surface water from draining into excavation.
Where required to protect utilities, perform excavation by hand.
Remove cemented subsoil, boulders, and rock. Cemented subsoil,
boulders, and rock shall be defined as materials which can not be
readily broken down to less than 1/4 cu. yd. solid volume by
concentrated effort of a track-mounted excavator, equivalent to a
Caterpillar 315, equipped with rock teeth. Notify Engineer if
subsurface conditions require excavation of larger cemented subsoil,
boulders, and rock, and discontinue work in affected area until notified
to resume work. If cemented subsoil, boulders, or rock greater than %:
cu. yd. solid volume is encountered above required excavation,
Engineer may direct adjustment in construction elevations based on site
and sub-surface conditions encountered during construction.
Adjustment of elevations shall not be a basis for additional payment.
Correct areas over excavated in accordance with Section 6 (Filling,
Backfilling, and Compaction). Stockpile select excavated material on-
site for re-use in backfill where appropriate. Stockpile location shall be
subject to Owner and Engineer approval.
5.6 PLANTING PREPARATION
In areas where select planting will be implemented, the stockpiled
topsoil should be redistributed as directed by the engineer in
preparation of stabilization operations as described in SECTION 10
(Sediment & Erosion Control) of these Specifications.
All areas where topsoil is distributed shall be disked or harrowed to
ensure soil aeration and to increase the surface roughness prior to
planting.
5.7 TOLERANCES
Top surface of graded areas (where applicable): Plus or minus two
inches from required elevation.
Top surface of fill, backfill, and topsoil: Plus or minus two inches from
required elevations.
END OF SECTION
S&EC Project No. 9840.132 Page 4 Technical Specifications
Pace Street Subdivision Stormwater Bioretention Areas September 2006
SECTION 6 - FILLING, BACKFILLING AND COMPACTION
11 6.1 SECTION INCLUDES
Provide all necessary equipment and labor to perform filling,
backfilling of bioretention areas, and other site work as shown on the
Drawings without damage or interruption of utility service.
Replacement of removed topsoil shall be as described in SECTION 10
(Sediment & Erosion Control) of these Specifications.
6.2 MEASUREMENT AND PAYMENT
See SPECIAL CONTRACT PROVISIONS if applicable.
6.3 REFERENCES
ASTM D2487 - Classification of Soils for Engineering Purposes.
When the Specifications or Drawings differ from the requirements of
the above-referenced documents, the more stringent requirements shall
apply.
_ 6.4 FILL MATERIALS
La Soil excavated during construction and stockpiled may be re-used as
fill provided that it can be conditioned and compacted as specified.
Supplement or replace excavated soils with ordinary fill as needed to
complete work. Ordinary fill shall be any soil classified as SM, SC,
SP-SM, SP-SC, SC-SM, SP, or SW under ASTM D2487.
Waste areas may be available in the immediate vicinity of the project
site. Coordination with the Owner for wate areas is the responsibility
of the Contractor. If soil excavated during cut operations is not re-used
and no waste areas are available on site, it shall be removed from the
site to an appropriate disposal facility at no additional charge to Owner.
The Contractor shall be responsible for the payment of all fees
associated with transportation and disposal of unusable materials.
Suitable borrow material may be available within the vicinity of the
project site but must be identified by a Geotechnical Engineer. The
Contractor shall obtain results of a Standard Proctor test, Atterberg
® Limits test, and classification in accordance with ASTM D2487, and
submit to the Engineer for approval.
6.5 PREPARATION
Within trenches excavated for outlet pipe or structure installation
compact subgrade to density requirements for subsequent backfill
materials. Cut out soft areas of subgrade not capable of compaction in
place. Backfill with ordinary fill material and compact to density equal
to or greater than requirements for subsequent fill material.
e, 6.6 BACKFILLING, FILLING, AND SURFACE PREPARATION
Loose materials within excavated bioretention area shall be removed by
hand as necessary to reduce potential for compaction of in-situ soils.
Biorctention media material shall be placed loosely in even lifts of no
greater than 12 inches within excavated bioretention area. No
compaction effort shall be applied. Drop height of material shall not
exceed 2 feet. Care shall be taken not to disturb riser, barrel, or under-
drain system during backfilling operations.
For trenches excavated for pipe placement, backfill areas to contours
and elevations with unfrozen materials. For backfilling of trench
excavated for pipe installation and other low points, lift thickness shall
not exceed 12". Do not backfill over porous, frozen, or spongy
subgrade surfaces. Employ a placement method that does not disturb
or damage other work. Slope grade minimum 2 inches in 10 feet,
unless noted otherwise. Make gradual grade changes. Blend slope into
level areas. Place backfill and fill in loose level lifts not to exceed six
inches in thickness before compaction. Make gradual grade changes.
Blend slope into level areas.
Earth fill in slopes, channel plugs, and other structures designed to
restrain the movement of water shall be placed so as to meet the
following additional requirements:
a. The distribution of materials throughout each zone shall be
essentially uniform and the fill shall be free from lenses, pockets,
streaks, or layers of material differing substantially in texture or
gradation from the surrounding materials.
b. Backfill areas to contours and elevations with unfrozen materials.
Do not backf ill over porous, frozen, or spongy subgrade surfaces.
Employ a placement method that does not disturb or damage other
work. Place backfill and fill in loose level lifts not to exceed six
inches in thickness before compaction. Make gradual grade
changes. Blend slope into level areas. Slope grade minimum 2
inches in 10 feet, unless noted otherwise.
C. If the surface of any layer becomes too hard and smooth for proper
bond with the succeeding layer, it shall be scarified parallel to the
axis of the fill to a depth of not less than 2 inches before the next
layer is placed.
6.7 COMPACTION
No compaction effort shall be applied to bioretention media.
Compaction shall be performed using the appropriate equipment.
Compacted areas shall be trafficked with the equipment minimum of
two passes in both directions for each compacted soil lift.
6.8 PROTECTION OF FINISHED WORK
Protect finished work. Reshape and rc-compact fills subjected to
vehicular traffic or damaged by erosion.
6.9 TOLERANCES
Top surface of graded bioretention areas (where applicable): Plus or
minus two inches from required elevation.
Top surface of fill, backfill, and topsoil: Plus or minus two inches from
required elevations.
END OF SECTION
S&EC Project No. 9840.D2 Page 5 Technical Specifications
Pace Street Subdivision Stormwater Bioretention Areas September 2006
SECTION 7 - OUTLET CONTROL STRUCTURE
7.1 SECTION INCLUDES
This section consists of the general requirements for the construction of
all components of the all outlet control structures to include, but not
limited to the pre-cast concrete riser structure pipe (CPP), the outlet
barrel, and the underdrain collection system.
7.2 MEASUREMENT AND PAYMENT
See SPECIAL CONTRACT PROVISIONS
7.3 REFERENCES
The following Specifications and methods form a part of this
specification:
NCDOT - Standard Specifications for Roads and Structures
ASTM C478 - Standard Specification for Precast Reinforced Concrete
Manhole Sections
AASHTO M252 - Standard Specifications for Corrugated Polyethylene
Drainage Tubing
ASTM D2000- Standard Classification System for Rubber Products in
Automotive Applications
ASTM D2487 - Standard Classification of Soils for Engineering
Purposes (Unified Soils Classification System)
ASTM D3212 - Standard Specifications for Joints for Drain and Sewer
Plastic Pipes using Flexible Elastomeric Seals
ASTM D3776 - Standard Test Methods for Mass Per Unit Area
(Weight) of Woven Fabric
ASTM D4491 - Standard Test Methods for Water Permeability of
Gcotextiles by Permittivity
ASTM D4632 - Standard Test Method for Grab Breaking Load and
Elongation of Gcotextiles
ASTM D4833 - Standard Test Method for Index Puncture Resistance
of Gcotextiles, Gcomembranes, and Related Products
ASTM F477 - Standard Specifications for Elastomcric Seals (Gaskets)
for Joining Plastic Pipe
ANSI B18.22.1- Current Edition
AW WA C501 - American Water Works Association
SECTION 5 (Excavation) of these Specifications
SECTION 6 (Filling, Backfilling, and Compaction) of these
Specifications
When the Specifications or Drawings differ from the requirements of
the above- referenced documents, the more stringent requirements shall
apply.
7.4 MATERIALS
Materials include those required for the construction of the Outlet
Control Structure (including the riser and barrel), and underdrain
collection system.
Precast concrete structures (Manhole structures): Shall be furnished,
fabricated and placed in conformity with the shape and dimensions
shown on the plans and as specified. Manhole sections shall be precast
concrete conforming to ASTM C478 of the size and depth shown on
the Drawings with rubber gasket joints. Concrete shall be capable of
withstanding the loads applied during gate operation at maximum
unseating head of 15 feet. Lift holes shall not be cast into units.
Drain Pipe and Fittings: Shall be AASHTO M252 Type S or SP
(Smooth Interior, Corrugated Exterior) with a nominal internal
diameter of 4 inches. Use perforated pipe inside seepage diaphragm
and solid pipe outside seepage diaphragm. Maximum 0.5 inch
perforations.
Hypalon Bands: Shall have a minimum thickness of 36 mils. Band
shall be bonded to concrete with a 2-inch epoxy strip both top and
bottom. Apply epoxy to both surfaces. Bond Hypalon to itself in
accordance with manufacturer's recommendations. Only one splice
allowed per band.
Nonwoven Gcotextilc: Gcotcxtile shall be a nonwoven fabric with a
minimum weight of 6 ounces per square yard (ASTM D3776), a
minimum grab strength in either direction of 180 pounds (ASTM
D4632), a minimum puncture resistance of (ASTM D4833) of 85
pounds, and permeability of (ASTM D4491) greater than 0.2 cm/sec.
Fabric meeting these Specifications shall still be subject to approval or
rejection by the Engineer. At the time of installation, the fabric will be
rejected if it has defects, rips, holes, flaws, deterioration, or damage
incurred during the manufacture, transportation, or storage.
NCDOT Coarse Aggregate Size #57: Shall conform to gradation
requirements of Table 1005-1, NCDOT Specifications.
7.5 PRECAST CONCRETE RISER
The Contractor shall furnish all labor, tools, equipment, materials,
supplies and other requirements necessary for the installation of the
riser as shown on the plans.
All joints on the riser shall be sealed with joint binder and wrapped
externally with a hypalon band.
Pumps shall be utilized to keep the excavation free of standing water
during construction. The Contractor may utilize a layer of crushed ston
in the excavation for leveling purposes. Stone thickness shall not
exceed 4 inches.
Materials shall not be unloaded by dropping, throwing or otherwise
carelessly removing from delivery vehicles in such a manner as to alter
the configuration or damage the materials. Damaged items shall be
replaced or repaired prior to erection.
7.6 OUTLET BARREL
The Contractor shall furnish all labor, tools, equipment, materials,
supplies and other requirements necessary for the installation of the
corrugated plastic pipe (CPP) outlet barrel as described herein and
shown on the Drawings.
S&EC Project No. 9840.D2 Page 6 Technical Specifications
Pace Street Subdivision Stormwater Bioretention Areas September 2006
Each joint shall be wrapped with nonwoven geotextile as specified
below. Joints shall be overlapped with nonwoven gcotcxtile a
minimum of 12" wide, centered on the joint. Gcotextile wraps shall be
taped on both sides of joint to reduce the potential for movement
during backfill operations.
Subgrade preparation for the pipe shall be performed immediately prior
to placement of pipe with required joint gaskets in the trench. The
trench shall be dug to the required alignment and depth as shown on
the Drawings or directed by the Engineer, and only so far in advance of
the pipe laying as the Engineer shall permit.
The width of the trench shall be kept at a minimum. Except where
improved bedding is required, mechanical excavation of trenches for
the pipe shall not extend lower than I" above the finished subgrade
elevation. Correction of a subgrade that is too low shall be done only
by placing and compacting suitable material (approved by the
Engineer) over the entire width of trench and regrading.
If the trench bottom should be softened by flooding, rain or other
causes, the unsuitable material shall be removed and replaced with
suitable material properly shaped and tamped to grade.
Care shall be taken during loading, transportation, unloading, and
installation to prevent damage to the pipes or fittings. All pipe and
fittings shall be carefully examined before installing and no piece shall
be installed which does not conform to the appropriate ASTM
Specification. Any defective, damaged or unsound material shall be
repaired or replaced as directed by the Engineer.
All pipe shall be laid by experienced workmen with straight lines, even
grades, and all joints shall be perfectly fitted. All pipe fittings and
accessories shall be carefully lowered into the trench with suitable
equipment in a manner that will prevent damage to pipe and fittings.
Under no circumstances shall pipe or accessories be dropped or
dumped into the trench. Pipes shall be laid to the required lines and
grades on prepared subgrade or improved bedding. Any bedding
disturbed during the installation of the pipe shall be repaired prior to
resuming the placement of the pipe and placement of the concrete
cradle. The pipe shall be installed with the bell ends in the direction of
laying. Pipeline for gravity means shall begin at the low end of the run
and all pipe shall be laid with the bells or socket uphill.
All foreign matter or dirt shall be removed from the interior and ends of
pipe and accessories before it is lowered into position in the trench.
When joined in the trench, the pipe shall form a smooth line and shall
be fitted together so that the alignment and scope are correct. Pipe
shall not be trimmed except for closure, and pipe not making a good fit
shall be removed. No pipe shall be laid until the preceding length has
been completely aligned and secured. Pipe shall be kept clean by
means approved by the Engineer, during and after laying.
If any defective pipe or fittings are discovered after installation, they
shall be removed and replaced with sound pipe and fittings or shall be
repaired by the Contractor in an approved manner and at his own
expense. The installed pipe shall not be disturbed in any manner and
its proper grade and alignment shall be maintained during pipe joining,
pipe embedment, and backfilling operation.
The interior surface of all pipes shall be cleaned when installed and
shall be kept clean until final acceptance. Temporary bulkheads shall
be placed in all open ends of pipelines when pipe laying is not actively
in progress. The bulkheads shall be designed to prevent the entrance of
dirt or debris and shall not be removed until pipe laying is resumed.
S&EC Project No. 9840.D2 Page 7
Pace Street Subdivision Stormwater Biorctention Areas
When danger of water entering the pipeline may exist, the bulkheads
shall be designed to prevent the entry of water. Adequate precaution
shall be taken by the Contractor to prevent the flotation of pipes during
backfill operations or in the event of water entering the trench.
Embedment shall be defined as that portion of the trench from the
subgrade to an imaginary line drawn 18" above the top of the pipe.
Embedment materials shall be the excavated soil or borrow material,
subject to the Engineer's approval. Pipe embedment materials shall be
deposited by hand tools in layers not to exceed 6" in uncompacted
depth. Deposition and compaction shall be done simultaneously and
uniformly on both sides of the pipe so as to insure adequate lateral and
vertical stability of the installed pipe system during subsequent,
embedment and backfill operations. In no case will impact or
unbalanced deposits of materials be allowed.
Backfill for pipelines shall be defined as that portion of the trench from
an imaginary line drawn 18" above the top of the pipe to the original
ground surface. Backfilling in general will be done with suitable
excavated materials. Debris, material not given to adequate
compaction, and stone over 1" in diameter will not be allowed within
the trench limits. If material excavated is not suitable, special backfill
of local suitable soil shall be used.
7.7 UNDERDRAIN COLLECTION SYSTEM
The Contractor shall provide all labor, materials, equipment, and
services necessary for the proper completion of work and any necessary
fabrication work indicated on the Drawings and specified herein.
Contractor shall install the undcrdrain collection systems to the sizes,
shapes and profiles shown. Where items are shown on the Drawings,
but not specifically noted, they shall be of the size, arrangement and
quality for the proper completion of the work. Undcrdrain collection
systems shall be constructed in the presence of the Engineer.
Trench excavated for the undcrdrain system shall be approved by the
Engineers prior to the placement of system materials. The trench shall
be dug to the required alignment and depth as shown on the Drawings
or as directed by the Engineer, and only so far in advance of the pipe
laying as the Engineer shall permit. The width of the trench shall be
kept to a minimum.
Geotextile fabric shall be placed in the trench free of tears and folds.
Fabric shall be placed against trench walls to eliminate voids and
reduce the potential for tearing of fabric during backfill operations.
Aggregate shall be carefully placed in trench in lift thicknesses of not
more that 3 inches. Install drain pipes for discharge to the outlet
control structure as shown on the plans.
Care shall be taken during loading, transportation, unloading, and
installation to prevent damage to the pipes or fittings. All pipe shall be
carefully examined before installing and no piece shall be installed
which does not conform to the appropriate ASTM Specification. Any
defective, damaged or unsound material shall be repaired or replaced as
directed by the Engineer.
All pipe shall be laid by experienced workmen with straight lines, even
grades, and all joints perfectly fitted. The pipe shall be installed with
the bell ends in the direction of laying. Drain pipes shall be installed at
a minimum slope of 0.5%. Perforated pipe shall be installed inside the
underdrain collection system with solid pipe installed at the interface
with the outlet structure.
Technical Specifications
September 2006
The upstream end of each collection pipe shall be capped. All pipe
joints and end caps shall be securely taped in place to avoid separation
during backfilling. Care shall be taken to avoid damage to drain pipes,
riser, or outlet barrel during construction of underdrain collection
system. All foreign matter or dirt shall be removed from the interior
and ends of the pipe and accessories before it is placed into the trench.
Backfilling of aggregate around pipe shall be performed by hand in
layers not to exceed 4 inches. Aggregate shall be placed uniformly and
simultaneously on both sides of the pipe so as to insure adequate lateral
and vertical stability of the installed pipe during subsequent
embedment and backfill operations. In no case will impact or
unbalanced deposits of aggregate materials be allowed.
Upon completion of pipe installation and trench backfilling with
aggregate the fabric shall be tightly closed over the trench. Overlaps
shall be made along the top and ends of the trench such that at no point
along the underdrain collection system does aggregate come in direct
contact with the surrounding soils or the biorctention medium.
Additional fabric shall be used as necessary or as directed by the
Engineer.
In the event that pipe or other installed work is displaced or damaged
during the construction of the diaphragm, the materials shall be
removed and the pipe or work repositioned or replaced prior to
reconstruction. Reconstruction shall be performed at the Contractor's
expense.
7.8 SUBMITTALS
For review the Contractor shall submit data for the following items
specified in this Section if requested:
I. Trade names and manufacturer's data for proprietary items.
2. Certificates of conformance of all pre-cast concrete structures.
3. Certificates of conformance of corrugated plastic pipe.
END OF SECTION
SECTION 8 - BIORETENTION AREA PLANTING
8.1 SECTION INCLUDES
Provide all necessary equipment and labor to implement planting plan.
8.2 MEASUREMENT AND PAYMENT
See SPECIAL CONTRACT PROVISIONS if applicable.
8.3 REFERENCES
The following Specifications and methods form a part of this
specification:
NCDOT - Standard Specifications for Roads and Structures.
15 NCAC 213.200 - Classification of Water Quality Standards
Applicable to Surface Waters & Wetlands of North Carolina
The Baily Hortorium (1976 MacMillan Publishing Co., Inc.)
American Standard for Nursery Stock, latest edition
NCDENR - Erosion and Sediment Control Planning and Design
Manual
When the Specifications or Drawings differ from the requirements of
the above-referenced documents, the more stringent requirements shall
apply.
8.4 GENERAL
All plants shall be as called for by theses Specifications. Botanical
names referred to in the plans are taken from "Hortus Third", the Baily
Hortorium (1976 MacMillan Publishing Co., Inc.). All plants
delivered shall be true to name. Each plant, or group of the same
species, variety, and size of plant, shall be legibly tagged with the name
and size of the plant. All plants shall be first-class representatives of
their species.
All plants shall be free from plant diseases and insect pests. All
shipments of plants shall comply with all nursery inspection and plant
quarantine regulations of the states of origin and destination, as well as
with Federal regulations governing interstate movement of stock. If
stock from other states is used, the stock shall be accompanied by a tag
or certificate stating, in effect, that the stock has been inspected and
certified by an authorized official of the state of origin as apparently
free from injurious plant pests.
All plants shall be subject to inspection at any time by the Engineer.
Any such inspection before or during planting operations, however
shall not be construed as final acceptance of the plants involved.
8.5 PLANT SUBSTITUTION
No change in the specified plants (species, variety, size, caliper, ctc.)
will be made without written approval of the Engineer. All requests by
the Contractor for substitutions shall be presented in writing and shall
include a listing of the sources which have been contacted in an attempt
to secure the specified plant material. Requests for substitutions shall
include botanical name, common name, size, caliper, and furnish
description of the proposed substitute. No increase in compensation
S&EC Project No. 9840.D2 Page 8 Technical Specifications
Pace Street Subdivision Storniwater Bioretention Areas September 2006
will be made to the Contractor as a result of the use of the approved
substitute plants.
8.6 PLANTING PREPARATION
In areas where bioretention will be implemented, preparation for
planting operations shall be as described in SECTION 10 (Sediment &
Erosion Control) of these Specifications.
Where perimeter plants shall be planted through Slope Protection
Matting, holes shall be made by neatly punching a hole in the matting.
The dimensions of the hole shall not exceed more than 2" greater than
the pot or root ball diameter in any direction, taking care not to damage
® the surrounding matting.
8.7 CONTAINER GROWN PLANTS
Container grown plants if desired for use by the Contractor shall be
healthy, vigorous, well-rooted, and shall have become established in
the container in which they are delivered. These plants shall have been
in the established container long enough for the fibrous roots to have
developed so that the root mass will retain its shape and hold together
when removed from the container. The container shall be of the size
shown on the Drawings or larger, sufficiently rigid to firmly hold the
soil protecting the root during transporting, handling, and planting, and
the soil shall not be allowed to become frozen.
8.8 BALL & BURLAP PLANTS
Contractor shall be responsible for furnishing, installing, and
maintaining ball and burlap (B&B) trees as shown on the plans and in
locations as directed by the Engineer. Work includes providing all
materials necessary to prepare plant bed and install B & B trees.
The planting stock for B & B trees should be grown by nurseries within
200 miles of the project site. Plant stock may be obtained from
nurseries beyond the 200-mile limit with the approval of the Planting
Plan Designer. All B & B trees shall have a 2.5-inch minimum caliper
stem and show no signs of recent stress.
8.9 PLANT INSTALLATION
No planting shall be done when the temperature is below 32T, when
soil to be excavated for the plant hole is frozen, when the sides or
bottom of the plant hole arc frozen, or when the soil to be used for
backfilling is frozen or too wet. In digging, loading, transporting,
unloading, planting, or otherwise handling plants, the Contractor shall
exercise utmost care and use adequate precautions to prevent injury to
or drying out of the trunk, branches, or roots as well as prevent freezing
of the plant roots.
re, I r9i
The planting hole shall be deep and wide enough to permit roots to
spread out and down without J-rooting and be at least two times the
diameter of the rootball taking care not to plant the tree too deeply.
The rootball shall be placed on solid soil and not loose backfill.
Planting medium shall be replaced around the tree and lightly tamped
to eliminate air pockets. The plant stem should be upright upon
completion of installation. Trees over five feet tall will require staking.
The holes for the trees & shrubs must not be dug more than a few hours
in advance of planting since it may fill with water preventing planting.
If the hole fills with water during digging, the site is too wct and tree
roots will `drown'. Planting should be delayed until conditions
improve. In addition, leaving a hole overnight may cause frost to build
S&EC Project No. 9840.D2 Page 9
Pace Street Subdivision Stormwater Bioretention Areas
up in the hole that can damage newly planted tree roots.
8.10 PLANTING PERIODS
The installation of plant material shall be performed in mid to late fall,
between October 15 and March 15 (best planting period February 1 to
March 1) to allow plants to stabilize during the dormant period and set
root during the spring.
8.11 SUBMITTALS
Contractor shall submit purchase certificates including quantities, size,
species, supplier and supplier locale (or other proof) of all species
planted to the Engineer.
END OF SECTION
Technical Specifications
September 2006
SECTION 9 - PERMANENT SEEDING
9.1 SECTION INCLUDES
Permanent seeding for permanent site stabilization.
9.2 MEASUREMENT AND PAYMENT
See SPECIAL CONTRACT PROVISIONS if applicable.
9.3 REFERENCES
The following Specifications and methods form a part of this
specification:
NCDENR - Erosion and Sediment Control Planning and Design
Manual
When the Specifications or Drawings differ from the requirements of
the above-referenced documents, the more stringent requirements shall
apply.
9.4 GENERAL
Permanent seeding shall be executed in temporary lined areas and all
other areas which are disturbed during construction activities. In areas
where erosion control matting will be installed, seedbed preparation
and seeding shall be performed prior to the placement of erosion
control matting (See SECTION 10 - Sediment & Erosion Control).
9.5 SEEDBED PREPARATION
Complete grading before topsoiling or preparing seedbeds. Avoid
creating steep slopes. Excess stockpiled topsoil not used in
construction shall be redistributed across areas to be seeded. Where
topsoil is unavailable, seedbeds may be prepared directly on the
exposed finished grade or topsoil may be imported. Topsoil shall not
be distributed over planting media or surface mulch layer.
If topsoil is used, it should be spread to a uniform depth of four to six
inches and bonded to the subsoil by loosening with a disc, harrow, or
chisel plow. Areas where seeding will occur on exposed finished grade
shall be disked or harrowed to ensure soil aeration and to increase the
surface roughness prior to planting.
Apply lime and fertilizer evenly across seedbed and work into the top
4-6 inches of soil by discing or other suitable means. Operate
machinery on the contour.
Rework the surface if soil becomes compacted or crusted prior to
seeding. Complete seedbed preparation by breaking up large clods and
raking into a smooth, uniform surface. Fill in or level depressions that
can collect water.
9.6 SEEDING
Apply permanent seeding to seedbed after preparation is complete. Use
certified seed for permanent seeding whenever possible. Certified seed
is inspected by the North Carolina Crop Improvement Association. It
meets published North Carolina Standards and should bear an official
"Certified Seed" label. Broadcast seed into a freshly loosened seedbed
that has not been settled by rainfall. Mulch must be used on all
S&EC Project No. 9840.D2 Page 10
Pace Street Subdivision Stormwater Bioretention Areas
exposed areas with special attention paid to slopes 4H:1 V or steeper
and in areas when concentrated water may flow. Anchor mulch with
netting in areas subject to concentrated flow.
9.7 SEEDING DATES
Seeding dates given in these seeding Specifications have the best
probability of success.
Best Possible
Late winter 15 Feb-15 Mar 1 Dcc-15 Mar
Seeding shall be completed within the "possible" range of dates unless
otherwise approved by the Engineer. Approval of the application of
Permanent Seeding measures outside of the desired date does not
relieve the Contractor of responsibility for ensuring vigorous growth as
described in Section 11.
9.8 SOIL AMENDMENTS
Apply lime and fertilizer according to soil tests, or apply I tons/acre
(2,000 lb/acre) ground agricultural limestone and 750 lb/acre 10-10-10
fertilizer.
9.9 MULCH
Apply grain straw, or equivalent cover of another suitable mulching
material as described above and as approved by the Engineer. Anchor
mulch by roving or netting.
END OF SECTION
Teclutical Specifications
September 2006
SECTION 10 - SEDIMENT AND EROSION CONTROL
10.1 SECTION INCLUDES
Installation of temporary sediment and erosion control measures to
include installation of silt fence, erosion control matting, temporary
erosion control devices, temporary seeding measures, and pump around
operations. The Contractor shall maintain these measures to ensure
proper structure function and vigorous temporary vegetative cover
during construction.
10.2 MEASUREMENT AND PAYMENT
See SPECIAL CONTRACT PROVISIONS if applicable.
10.3 REFERENCES
The following Specifications and methods form a part of this
specification:
NCDOT - Standard Specifications for Roads and Structures
ASTM C88 - Standard Test Method for Soundness of Aggregates by
Use of Sodium Sulfate or Magnesium Sulfate
ASTM C 127 - Standard Test Method for Specific Gravity and
Absorption of Coarse Aggregate
ASTM D698-78 - Moisture Density Relationships of Soils
ASTM D3776 - Standard Test Methods for Mass Per Unit Area
(Weight) of Woven Fabric
ASTM D4355 - Standard Test Method for Deterioration of Gcotextiles
from Exposure to Ultraviolet Light and Water (Xenon-Arc Type
Apparatus)
ASTM D4491 - Standard Test Methods for Water Permeability of
Gcotextiles by Permittivity
ASTM D4632 - Standard Test Method for Grab Breaking Load and
Elongation of Gcotextiles
ASTM D4751 - Standard Test Method for Determining Apparent
Opening Size of a Gcotextile
ASTM D4833 - Standard Test Method for Index Puncture Resistance
of Gcotextiles, Gcomembranes, and Related Products
U.S. Federal Highway Administration (FHWA) and U.S. Bureau of
Reclamation (USBR) Report, FHW-RD-89-199, Hydraulic Stability of
Articulated Concrete Block Revetment Systems During Overtopping
Flow
NCDENR - Erosion and Sediment Control Planning and Design
Manual
When the Specifications or Drawings differ from the requirements of
the above-referenced documents, the more stringent requirements shall
apply.
10.4 MATERIALS
Materials include silt fence, cxcelsor netting, wire staples, wooden
construction stakes, nonwoven gcotextile, erosion control stone and rip
rap.
Silt Fence: Silt fence shall have steel posts, woven wire fabric, and
filter fabric. The steel post shall have a minimum length of 5' and
minimum width of 1 '/.". The steel posts shall have projections for
fastening the wire to the fence. The woven wire fabric shall be at lest
32 inches high, and shall have at least 6 horizontal wires. Vertical
wires shall be spaced a maximum of 12 inches apart. The top and
bottom wires shall be at least 10 gauge. All other wires shall be at least
12%: gauge. The silt fence filter fabric shall meet the following
minimum criteria:
Grab Tensile Strength 100 lbs.
Grab Tensile Elongation 15%
UV Resistance 70%
Apparent Opening Size (AOS) 20 (US Sieve)
Excelsior Matting: Matting for erosion control in areas other than
streambanks with slopes graded greater than or equal to 3H:1 V shall be
excelsior matting. Excelsior matting shall consist of a machine
produced mat of curled wood excelsior a minimum of 47 inches in
width. The mat shall weigh 0.975 pounds per square yard with a
tolerance of plus or minus 10 percent. At least 80 percent of the
individual excelsior fibers shall be 6 inches or more in length. The
excelsior fibers shall be evenly distributed over the entire area of the
blanket. One side of the excelsior matting shall be covered with an
extruded plastic mesh. The mesh size for the plastic shall be a
maximum of 1" x I" square. Matting for erosion control shall not be
dyed, bleached, or otherwise treated in a manner that will result in
toxicity to vegetation. Other acceptable material manufactured
especially for erosion control may be used when approved by the
Engineer in writing before being used.
Wire Staples: Shall be machine made of No. 11 gage (0.091"
diameter) new carbon steel wire formed into a "U" shape. The size
when formed shall be 18" in length with a throat of not less than 1" in
width.
10.5 SILT FENCE
The Contractor shall provide all labor, materials, tools and other items
necessary to furnish and install the silt fence as shown on the Drawings
and specified herein. The silt fence shall be placed following the
contours as closely as possible. The ends of the silt fence shall be
turned uphill.
The posts shall not exceed a spacing of 8 feet. The posts shall be
driven into the ground and shall extend above ground as shown on the
plans. The filter fabric shall be stapled or wired to each post. The filter
fabric shall extend into the ground as shown in the plans.
If possible, the filter fabric shall be cut from a continuous roll to avoid
the use of joints. When joints are necessary, securely fasten the filter
cloth only at a support with an overlap of not less than 8 feet to the
next post.
Silt fences shall be inspected weekly and after each significant storm
(0.5 inch in 24 hrs.). Any required repairs shall be made immediately.
Sediment shall be removed when it reaches 1 /3 height of the fence or 9
S&EC Project No. 9840.D2 Page 1 I Technical Specifications
Pace Street Subdivision Stormwater Bioretention Areas September 2006
inches maximum. Dispose of the sediment in the designated disposal
area.
10.6 INSTALLATION OF EROSION CONTROL MATTING
Erosion control matting shall be used or all slopes steeper than 3HA V
unless otherwise approved by the Engineer.
Grade area to be lined. Surface shall be free of obstructions, debris,
and pockets of soft or low density material.
Cover area with stockpiled topsoil to a depth of not less than 4 inches.
Final grade with topsoil shall be as shown on Drawings. Topsoil shall
be prepared with fertilizer and lime, and seeded as described in Section
9 (Permanent Seeding) of these Specifications.
Install excelsior matting perpendicular to slope. Matting shall be
unrolled with netting material on top and blanket material in contact
with the soil. (Note: some excelsior matting has netting on both sides.)
The matting shall be laid smooth and free from tension, stress, folds,
wrinkles or creases. Horizontal overlaps shall be a minimum of 12
inches with the upper matting overlapping the lower matting. Vertical
overlaps in matting shall be a minimum of 12 inches.
The top and bottom edges of the matting shall be anchored in trench at
least 12 inches deep as shown on plans to prevent undercutting of the
matting. Matting trench and wire staples shall be constructed and
installed as shown on Drawings.
Wire staples shall be installed not more than 3 feet apart (Yon centers)
and staggered, with a minimum of 3 staples per square yard of matting
over the entire lined area. Staples shall be driven perpendicular to the
soil surface. Staples shall be driven flush with soil surface to reduce
potential for movement of the erosion control matting. Staples shall be
installed in parallel rows on 3' centers and in trenches at the top and
bottom of the slope as shown on Drawings.
Along all laps (both vertical and horizontal) in the matting, install a
common row of staples at the scam, installing staples on 1'(12")
centers. All staples shall be driven so that the throat of the staple is
perpendicular to the axis of the stream as shown in plans. Staples shall
be driven in with a wooden mallet. Care shall be taken to avoid
damage to matting material.
Contractor shall provide all labor, materials, tools and other items
necessary to furnish and install the excelsior matting as shown on the
Drawings and specified herein.
The matting shall be laid smooth and free from tension, stress, folds,
wrinkles or creases. When matting material is unrolled, netting
material should be on top with blanket material in contact with the soil.
(Note: Some excelsior matting has netting on both sides.) Horizontal
overlaps shall be a minimum of 12 inches with the upper matting
overlapping the lower matting. Vertical overlaps in matting shall be a
minimum of 12 inches with the upstream matting overlapping the
downstream matting.
In the event that the matting is displaced or damaged during
installation, the matting shall be repositioned or replaced. This will be
done at no additional cost to the Owner
10.7 TEMPORARY SEEDING
The Contractor shall provide all labor, materials, tools, and other items
necessary to provide temporary seeding in accordance with State and
local Standards.
Areas where no substantial or significant progress is made for more
than 15 days shall be temporarily seeded as shown on the Drawings and
specified herein. All areas must be seeded, mulched, and anchored
unless written approval is granted by the Owner. Incidental grading
shall not constitute substantial or significant progress in construction
activity. Seeding and mulching shall be done immediately following
construction.
Grass seed shall be applied at the following rate:
Tvpe Dates Possible Rate
German Millet May 1-Aug 15 40 lbs./ac.
Rye (Grain) Aug. 15 - May 1 60 lbs./ac.
Follow recommendations of soil tests or apply 2,000 Ibs/acre ground
agricultural limestone and 750 lbs/acre 10-10-10 fertilizer. Straw
mulch shall be applied to all disturbed areas after seeding. Mulching
shall consist of small grain straw applied a rate of 70 pounds per 1000
square feet (70lbs./l000sq.ft.).
If permanent and temporary seeding is performed at the same time,
only use soil amendments as described in Section 9 of these
Specifications.
END OF SECTION
S&EC Project No. 9840.D2 Page 12 Technical Specifications
Pace Street Subdivision Stormwater Bioretention Areas September 2006
SECTION II - SITE MAINTENANCE
11.1 SECTION INCLUDES
Site maintenance to ensure vigorous vegetative cover, stable slope
lining, general plot survivability and durability of the work.
11.2 MEASUREMENT AND PAYMENT
See SPECIAL CONTRACT PROVISIONS if applicable.
11.3 EXECUTION
Contractor shall revisit the site as required in the special contract
provisions to inspect the condition of the project site. Areas of erosion,
settlement, poor vegetative cover, and displaced excelsior materials or
structures, shall be repaired. Site visits shall be coordinated with
Owner.
Eroded areas shall be filled and reseeded in accordance with Section 9 -
Permanent Seeding. Areas of poor vegetative cover shall be reseeded
and refertilizcd only.
Displaced, damaged, or dead tree and shrub species shall be removed,
and replanted in accordance with Sections 8 - Bioretention Area
Planting.
END OF SECTION
I
S&EC Project No. 9840.D2 Page 13 Tecltnical Specifications
Pace Street Subdivision Stormwater Bioretention Areas September 2006
CONSTRUCTION DRAWINGS FOR:
PACE STREET SUBDIVISION

ECT
VICINITY MAP
(U5G5 RALEIGH, NC WEST QUAD
WITH RALEIGH EAST QUAD)
NOT TO 5CALE
WAKE
CONTENTS:
STORM WATER E31ORETENTION AREAS
ENVIRONMENTAL DE51GN FIRM:
501L * ENVIRONMENTAL
CON5ULTANT5, PA
11010 Raven Wdge Road
Raleigh, NC 27G 14
(919) 64G-5900
PREPARED FOR:
LEGACY CON5TRUCTION GROUP, INC.
P.0 .Box GGG4
Raleigh,,..NC 27628
[phone]
I.
2.
3.
4.
5.
G.
7.
9.
COUNTY, NC
S?.P
COVER, CONTENTS, VICINITY MAP
gtiN? pSSC?'S;°1'r?
OVERALL 51TE PLAN
BIORETENTION CELL # I
BIORETENTION CELL #2
BIORETENTION CELL #3
CONSTRUCTION SEQUENCE
5TORMWATER BIORETENTION CONFIGURATION
BIORETENTION * EROSION CONTROL DETAILS
PLANTING SCHEDULE * PLANTING DETAILS
DRAWINGS PRINTED
AT HALF-SCALE
? 51ZING
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V
NORTH
SCALE IN= 150' /
150 75 0 Ezz;;= 0
CONTOUR INTERVAL = 2'
1
I'
I
N BIORETAREAN? I
NOTES:
1. SITE AND TOPOGRAPHY DATA PROVIDED BY
JOHN A. EDWARDS 4 COMPANY.
2. LOCATIONS OF HOUSES, DRIVEWAY5, SIDEWALKS,
ETC. ARE 5UBJECT TO CHANGE BASED ON REVIEW,
COMMENT, AND CHANGES REQUIRED BY LOCAL
AUTHORITIES.
3, THE LOCATION AND SIZE OF BIORETENTION AREAS
AND COMPONENTS INCLUDING DRAINS, /
STRUCTURES, OUTLET PIPES, AND OUTFALLS ARE
APPROXIMATE AND MAY BE ADJUSTED BY THE
DESIGNER BASED ON CONDITIONS ENCOUNTERED
DURING CONSTRUCTION. L
DRAWI NG5 PRINTED
AT HALF-SCALE
a 2006 Sod 4 Environmental Consultants, PA. All rights reserved.

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?1
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CONSTRUCTION SEQUENCE:
Obtain NCDENR, Land Quality, ? local authority approval for
construction.
2. Locate and mark ex15tmg utilities on Site.
3. Install 511t fence around perimeter of work area. All 1n5talled
temporary Sediment and erosion control mea5ure5 will be
inspected weekly or after a mayor rainfall event (> 0.5 inches)
by the Contractor. Contractor to Supplement Site erosion
control needs a5 required by Site conditions. Upon m5pection,
any nece55ary repalr5 will be performed by the Contractor.
4. Clear and grub in required areas for bioretention areas.
Remove and Stockpile top 5011 in areas to be excavated.
5tockplle in area5 a5 Directed by Owner. Surround Stockpile
Areas with 2 Rows of Silt fence.
5. Excavate for m5tallation of bloretention area and underdrain
5y5tem. Perform bioretention area construction including
underdram 5y5tem and grading of the adjacent area5. install
outlet 5tructure5 and p?pe5 a5 directed by the Engineer at the
time of construction and a5 based on Site conditions. Engineer
to approve underdram trench and 5y5tem prior to placement of
fill media.
6. Install bioretention media materials described in
Specification and shown on plans. Do not compact fill
media. D15tr1bute surface mulch layer to depth shown on
plans.
7. Perform planting a5 5pec1fled. Engineer to be notified prior
to planting observation to approve planting bed conditions.
Install trees and 5hrub5 a5 5hown in the details and a5
directed by Engineer at time of Construction.
8. Redistribute Stockpiled topsoil material on adjacent
disturbed areas. Do not place topsoil on mulch layer within
bioretention area. Apply temporary 5eeding mea5ure5 to
disturbed areas a5 final grading is reached, Line perimeter
51OPe5 surrounding bioretention area with excel5or matting.
9. Remove Silt fencing and any other temporary erosion
control devices installed for the purp05e5 of bioretention
area construction.
10. Coordinate for walk-thru m5pection with Owner, Engineer,
and Agency Repre5entatlve5.
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© 2006 Sod S Enwonmental Consultants, PA. All ncghts reserved. C O N 5T RU CT I O N S E Q U E N C E
BIORETENTION PLANTINGS,
SEE TABLE AND DETAILS
EXI5TING
GROUND
SURFACE
85-88% SAND
8-12% FINES (SILT +CLAY)
2-5% ORGANIC SOURCE
NOTES:
I . EXISTING GROUND SURFACE
ELEVATIONS AT BIORETENTION
AREA LOCATIONS WERE
ESTABLISHED FROM AVAILABLE
51TE TOPOGRAPHIC DATA,
4' THICK BIORETENTION
MEDIUM, 5EE
5PECIFICATION5.
3" THICK ORGANIC
MULCH COVER
TEMPORARY / G„
PONDING DEPTH,
G INCHES
3H
IV r
2, ALL ELEMENTS SHOWN ON TABLE
ARE RELATIVE TO ASSUME STABILIZE PERIMETER
EX15TING GROUND SURFACE. ALL 5LOPE5 WITH
ELEVATIONS SHALL BE ADJUSTED EXCELSOR MATTING
BY ENGINEER AS NECESSARY
BASED ON SITE CONDITIONS.
3. THE LOCATION AND DIMENSIONS
OF SELECT COMPONENTS
INCLUDING MEDIA THICKNESS, UNDERDRAIN SYSTEM, 2 EACH
PIPE DIAMETER, UNDERDRAIN PERFORATED CF? ENCA5ED IN OVER EXCAVATE TO FIRM
SYSTEM, ETC., MAY BE ADJUSTED WASHED STONE AND NONWOVEN FOUNDATION LAYER
BY THE ENGINEER AT TIME OF GEOTEXTILE WRAP. ALL JOINTS A5 DIRECTED BY
TO BE COUPLED AND 5ECURED WITH ENGINEER AT TIME
CONSTRUCTION, DUCT TAPE, 5EE UNDER-DRAIN DETAIL. OF CONSTRUCTION
SPECIFICATIONS FOR
BIORETENTION AREA FILL MEDIA
MEDIA TO BE APPROVED BY
ENGINEER MOP, TO
INSTALLATION.
SQUARE PRECAST
CONCRETE BOX
R15ER, 5EE TABLE
TREATED 5TORMWATER
-M DIRECT DSCHARGE TO
ADJACENT STREAM CHANNEL
CPP OUTLET PIPE
IN5TALLED AT 0.5%
SLOPE MINIMUM FOR
P051TIVE DRAINAGE,
5EE TABLE
610RETENTION AREA SECTION VIEW (TYP.)
(NOT TO SCALE)
® 2006 Soil t Environmental
BIORETENTION BA51N DIMEN510N5
Bioretention
Basin Number Pondmg Depth
(Ft.) Bioretention
Surface Area
(5q. Ft.) Est. 5urroundmg
Grade Level
(Ft.) Bioretention
Area Surface El.
(Ft.) fbser Wier
Crest El.
(Ft.) Underdram
Pipe Diameter
(In.) Number of
Underdrain
Pipes Pvser
Dimensions
(Ft. x Ft.) PJSer Invert/
Barrel U(5 Invert
El. (Ft.) Barrel 0/5
InverT Elevation
(Ft.) Barrel Pipe
Diameter
(In.)
1 0.5 220 285 284 284.5 4.0 2 1.5 x 1.5 279 278.5 8.0
2 0.5 200 285 284 284.5 4.0 2 1.5 x 1.5 279 277.0 8.0
3 0.5 200 283 282 282.5 3.0 2 1.5 x 1.5 277 276.5 8.0
PA. All
5TORMWATER BIORETENTION CONFIGURATION ? 51ZING
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PRECA5T BOX COVER
2" THICK REINFORCED
CONCRETE 5ET ON
CORNER BLOCKS TO
ALLOW FOR G" CLEARANCE
Min. 12" Overlap
Existing Sods

\`
Underdram Pipes,
One Primary, One
Backup
Approximate
Bioretention Area
Perimeter Vanes,
See Table for Min.
Surface Area.
Riser/Darrel
Structure
? _d.. To Receiving
Water Course
Invert of
#57 or #G7 Bioretention
Washed Stone I -Area Excavation
i j CPP Underdram Pipe,
Corrugated Exterior,
Smooth Interior, Perforated,
Diam. Vanes, See Table.
G oz. Nonwoven
//- Geotextde Fabric
1 Encasement
2" Min. ;0S;coo
?- ?-- Mm. 18" -?I
BIORETENTION AREA UNDERDRAIN - TYPICAL
CRO55 SECTION
(NOT TO SCALE)
BIORETENTION AREA - TYPICAL PLAN VIEW
(NOT TO SCALE)
Erosion Control Matting,
Anchor in Trench @ Both
Top and Bottom Edges
3' Both -.,- 3' Both No. I I I" Min.
Directions Directions Gauge -
Steel
, I

Wire Staples Erosion Control

I 1=1 I

Ed I I=
A

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Mattng -
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ER0510N CONTROL MATTING ANCHORING DETAIL
(NOT TO SCALE)
?© 20OG Sod 4 Environmental
PA. All nghts reserved.
DETAIL
(NOT TO SCALE)
DIORETENTION * ER05ION CONTROL DETAILS
Underdram Pipe to
be Installed 0.5%
Minimum for Positive
Drainage, See Detail
Bioretention
Soil Media with
3" Organic
Mulch Cover
TREES
SPECIES COMMON NAME BA #1 BA #2 13A #3 TOT # MINIMUM 51ZE REMARKS
Taxodwm distichum Bald cyprus 1 0 .
0 1 Bail t Burlap Placed randomly throughout
Nyssa sylvatlca Black gum 0 1 0 1 Ball t Burlap Placed randomly throughout
Betula nlgra River birch 0 0 I I Ball t Burlap Placed randomly throughout
Chionanthus wrgmicus Prmgetree I I 1 3 Ball t Burlap Placed randomly throughout
5HRUB5
SPECIES COMMON NAME BA # 1 BA #2 BA #3 TOT # MINIMUM SIZE REMARKS
Calycanthus floridis Sweetshrub 3 3 3 9 3-5 Gal, Placed randomly throughout
Itea \nrgmica Virginia sweetspire 3 3 3 9 3-5 Gal, Placed randomly throughout
Ilex glabra Inkberry 3 3 3 9 3-5 Gal, Placed randomly throughout
HERBS
SPECIES COMMON NAME BA # I BA #2 BA #3 TOT # MINIMUM SIZE REMARKS
Lobelia card nalis Cardinal flower 2 2 2 G I Gal. Placed randomly throughout
Helianthus angustifolius Swamp sunflower 2 2 2 G I Gal. Placed randomly throughout
Eupatonadelphus
fistulo5us Joe Pye Weed 2 2 2 G I Gal. Placed randomly throughout
Hlblscus moscheutos Rose mallow 2 2 2 G I Gal. Placed randomly throughout
Ascleplas tuberosa Butterflyweed 2 2 2 G I Gal. Placed randomly throughout
NOTES:
1. SPECIES LISTED IN TABLES ARE RECOMMENDED FOR PLANTING IN
EACH OF THE THREE (3) BIORETENTION AREAS, TOTAL
QUANTITIES LISTED ARE SUM OF ALL REQUIRED PLANTINGS.
2. SUBSTITUTION BASED ON AVAILABILITY ARE ALLOWED WITH
APPROVAL OF ENGINEER,
3. OWNER MAY AUGMENT PLANTING W! SELECT LARGER DIAMETER
SPECIMENS OF LISTED SPECIES TO GAIN DESIRED LANDSCAPE
EFFECT. LARGER SPECIMENS TO BE INSTALLED AS SHOWN IN
DETAILS,
ASEIT PREEVE3Nfi5 NATU RA TIG SWING
CROWN OF ROOT BALL SHALL BE
SET SLIGHTLY ABOVE GRADE.
MULCH: (3°) AVG. THICKNESS
STAKES (3)
RE OVE TSPES,(?zTO ?OF BALL SHALL BE CUT.
PREPARED ADMIIXTUUPRE6BRAICI KKFILL OR NATIVE 501L
TAMPED ADMIXTURE 13ACKFILL
DECIDUOUS TREE PLANTING - BALL ? BURLAP
MI T BAL? ALL BE
?HTLRY AOOBOVE E.
CH: (3") AVG. THICKNESS
PREPARED ADMIXTURE
BACKFILL OR NATIVE SOIL
TAMPED ADMIXTURE BACKFILL
DECIDUOUS TREE PLANTING - CONTAINERIZED
(NOT TO SCALE)
© 2006 Sod 4
ono
Zvm
(NOT TO SCALE)
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IL.I?Q it Z
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a?
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MULCH 80mm f3")
AVG. THICKNESS.
NON-BIODEGRADABLE
MATERIAL SHALL BE
TOTALLY REMOVED.
TOP50IL MIIXXTURREEED
TAMPED ADMIXTURE
BACKFILL
6':.
d l?r
?.
5HRUB PLANTING - CONTAINERIZED
(NOT TO SCALE)
PA, All nghtsrcrerved. PLANTING 5CN EDU LE ? PLANTING DETAI L5
;'4;-C-1
© Complete items 1, 2, and 3. Also complete
item 4 if Restricted Delivery Is desired.
13 Print your name and address on the reverse
so that we can return the card to you.
13 Attach this card to the back of the maiipiece,
or on the front if space permits.
1. Article Addressed to:
Mr. Matthew E. Blankinship
507 s. 4`I' Street
Mebane,NC 27302
DWQ 06-0098-Wake
Vrcem r
9
XC(/i?-??fli A ent ca
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3. Service Type
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--5 1160 0000 9954 9055
PS Form . , e ruary omes c e um ece 102595-02-M•15440
UNITED STATES POSTAL SERVICE

Sender: Please print your name, address, and ZIP+4 in this box •
NC DENR Division of Water Quality
401 Oversight/Express Unit
2321 Crabtree Boulevard, Suite 250
Raleigh, NC 27604
First-Class Mail
Postage ? Fees Paid
USPS
Permit No. G-10

t[7-•r •?ti?'fi'
e +. ,n ,,l, iJ , . , J+ IJJ / l ilt
© ; omp e e ems I, an so complete Es' ature
iem 4 if Restricted Delivery is desired. 1 13 Agent
© = tint your name and address on the reverse X?? /' ??? ? Addressee
so that we can return the card to you. B. Received by`(Printe? Name) ` C. D to bf elivery
o Attach this card to the back of the mailpiece, / I
or on the front if space permits.
D. Is delivery address different from ite 1? Yes
1. Article Addressed to: If YES, enter delivery address below: ? No
Mr. Matthew E. Blankinship
507 s.4tl' Street
Mebane, NC 27302
DWQ# 06-0098-Wake
3. S rvice Type
Certified Mail ? Express Mail
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1 4. Restricted Delivery? (Extra Fee)
2. Article Number
7005 1160 aooo 9954 8
PS Form , , e ruary 1 omes 0 e m ece p
? Yes
102595-02-M-1 ` ")
UNITED STATES POSTAL SERVICE
LISPS
• Sender: Please print your name, address, and ZIP+4 in this box •
NC DENR Division of Water Quality
401 Oversight/Express Unit
2321 Crabtree Boulevard, Suite 250
Raleigh, NC 27604
First-Class Mail
Postage & Fees Paid
Permit No. G-10
cva :