20100290 Ver 1_Minor Variance_20100419

EcoEngineering
L_ I A division of The John R. McAdams Company, Inc.
2 0 1 0 0 2 9 0
LETTER OF TRANSMITTAL
To: Mrs. Annette Lucas/ Mrs. Amy Chapman Date
NC Division of Water Quality - 401 Unit
2321 'Crabtree Boulevard, Suite 120
Raleigh, North Carolina 27604
919-733-1786
Re: Podger Buffer Variance Job No.
I am sending you the following item(s):
. April 19, 2010
** HAND DELIVER **
SPEC-10030
COPIES DATE NO. DESCRIPTION
3 Buffer Variance Application
3 USGS / Soils Survey / Drainage Class/ Aerial Photo
3 Rainwater Harvesting Supplement / calcs
3 Agent Authorization Form
3 GIS w. To o
3 Letter from Rising Sun Pools / Pool Specs
3 Proposed Impacts / Cistern over Survey
3 Cistern Specs
3 Proposed Planting Plan
3 Example Gutter Routing
3 Operation & Maintenance Agreement
These are transmitted as checked below:
? As requested
? For approval
® For review and comment
Remarks:
Copy to:
I 05i 91
? For your use K UV
CJ APR 1 a 2010
? DEW - W4T4k ©;iALITy
Signed:
olyn Pod r or Kevin tes
Project Manager
FOR INTERNAL USE ONLY
? Copy Letter of Transmittal Only to File
? Copy Entire Document to File
2905 Meridian Parkway, Durham, North Carolina 27713
2 0 1 0 0 2 9 0
U1*A
NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves ??'erdue Coleen H. Sullins Dee Freeman
Governor Director Secretary
Variance Request Form
(For Minor and Major Variances)
Protection and Maintenance of Riparian Areas Rules'
NOTE: This form ina be photocopied for uve av an original.
/',PR 1 2010
Check the appropriate box below: DEWi-WATER Q'JAUTy
I-] Major Variance WETLANDS ANDS OrRNIMATERMNCN
Minor Variance
Please identify which Riparian Area Protection Rule applies (Note-this must be one of
North Carolina's four buffered river basins. The River Bain map is available at
? 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 02B.0259)
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):
Chistopher A. anti Carolyn Podger
2. Print owner/Signing official (person legally responsible for the property and its compliance)
Name: Christopher A. and Carolyn Podger
Title: Owner
Street address: 133 Castlefern Drive
City, State, Zip: Cary, NC 27513
Telephone: ( 91.9) 467-3644
Fax: { 919) 462-1505
Version 6: July 2009
3. Contact person who can answer questions about the proposed project:
Name: Carolyn P. Dodger
Telephone: { 919) 4673644
Fax: ( 919) 462-1.505
Email: cpodger01(q, yahoo.com
4. Project name (Subdivision, facility, or establishment name - consistent with project name on
plans, specifications, letters, operation and maintenance agreements, etc.):
Podger -- Neuse Buffer Variance
5. Project location:
Street address: 133 Castlefern Drive
City, State, Zip: Cary, NC 2751.3
County: Wake
Latitude/longitude: 35 46' 35.77" N / 78 48' 38.91"
6. Date property was purchased: 07/31/2000
Directions to site from nearest major intersection (Attach an 8'/a x I I copy of the USGS topographic
map indicating the location of the site).
133 Castlefern Drive is located approximately 0.34 miles west of the intersection of
Castlefern Drive and Old Apex Road / Also Attached is a USES quad and Wake County
Soils Survey with the project location.
7. Stream to be impacted by the proposed activity:
Stream name (for unnamed streams label as "UT" to the nearest named stream):
U"1' to Crabtree Creck
8. Which of the following permits/approvals will be required or have been received already for this
project?
Required: Received: Date received
Part 2: Proposed Activity
(Please include attachments if the roam provided is insufficient.)
1. Description of proposed activity [Also, please attach a map of sufficient detail (such as a plat map
or site plan in Adobe (pdf) format) to accurately delineate the boundaries of the land to be utilized
Permit Type:
CAMA Major
CAMA Minor
401 Certification/404 Permit
On-site Wastewater Permit
NPDES Permit (including stormwater)
Non-discharge Permit
Water Supply Watershed Variance
Erosion/Sedimentation Control (likely)
Others (specify)
Variance Request Form, page 2
Version 6 July 2009
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 ft2.:
Due to topographic constraints and encumbrances required by the Town of Cary, the
owners of the single-fancily home at 133 Castlefern Drive, the Podgers are proposing to
construct an in-ground swimming pool within Zone 2 of the Neuse River riparian buffer.
The property lies on the south side of an unnamed tributary to Crabtree Creek and
there is a total of approximately 4,050 square feet of Neuse River buffer (zone 1 and
zone 2) within the property boundary. The proposed swimming pool and associated
patio will impact approximately 727 square feet within Zone 2 of the Neuse River
riparian buffer.
Please see the attached survey provided by Sullivan Surveying, dated January 25, 2010,
with the proposed location of the pool and proposed impacts to Zone 2 of the Neuse
River buffer, and Town of Cary GIS with contours.
2. Fill in the table below to identify the square footage of impact to Zones I & 2 in the protected
riparian buffers and the required mitigation (Fill in the impacts portion of the table, even if
mitigation is not required):
Buffer Impact
Zone of Impact in Number Purpose for
Multiplier Required
Impact Square Feet (Indicate on the Itnpact Mitigation
Plan Sheet)
Zone 1
- -
----?_~-?----- _
- 3
See Proposed
Pool/Patio on Pool See Riparian
Zone 2 727 Survey dated Installation 1.5 Buffer
January 25, Planting Plan
2010
Total
*Zone I extends out 30 feet perpendicular from the most landward limit of the top of bank or the rooted herbaceous
vegetation-, Zone 2 extends an additional 20 feet from the edge of Zone 1.
3. 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 Podger's have put considerably more time and capital than would be expected
from design and construction of a typical in-ground pool installation. A good
portion of the additional expense has been generated from the additional surveying
and consulting services required for the alternatives layout analysis and current
design proposed.
Per the letter from Rising Sun Pools, Inc., the Podger's proposed pool will require
headwalls and braces to safely construct the pool due to topographic constraints.
Most of the pool and patio could be sited adjacent to their existing decks on the
backside of their home and almost completed removed from the Zone 2 of the Neuse
Variance Request Form, page 3
Version 6 Jul), 2009
Buffer, however unique to this property are the Town of Cary's building setbacks.
The Town of Cary requires a 10-foot, minimum setback for retaining walls from an
existing structure, and the proposed retaining wall needed to construct the patio
safely is located 10.25-feet and 11.27-feet from the western wooden deck and eastern
wooden deck, respectively. As well, the concrete patio of an in-ground swimming
pool is required to be set at least 5-feet from tine property boundary, and the
proposed pool layout is 5.44-feet from the eastern property boundary. A shift
westward would impact more area of the Neuse Huffer than is currently proposed.
An alignment further away from the house and in a flatter section may not require
the extent of headwalls, however it would increase the buffer impacts and impact
zone 1 and zone 2 of the Neuse Buffer.
The proposed pool location currently meets the minimum setback distances required
and is oriented to have the least impact to the Neuse Buffer.
4. 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.):
A riparian buffer restoration plan (described below under Part 4: Proposed Impacts
and Mitigation) along with proper sedimentation and erosion control measures are
proposed to be utilized to control impacts associated with the proposed pool installation.
The proposed silt fence requirements are described in detail below. This is a
preliminary plan at this point and can be refined as the project progresses.
Erosion Control 1 Silt Fence
.'"cope:
Furnish material, construct, maintain, and remove temporary silt fence in locations
shown on the construction plans or in locations that require surface drainage to he
filtered. This plan can be detailed more specific as project progresses.
Material and Method of Construction:
Provide steel post meeting the f ollowing requirements:
steel post:
- 1.33 lb/ft with a minimum length of 4 feet
-- Equipped with an anchor plate with minimum area of 14.0 square inches
Ilave a means of retaining wire and fabric in the desired position without
displacement
TWO- Fabric:
Provide Type 3 Engineering fabric, Class A or B meeting the requirements of Section
1056 of the NCDOT Specification book.
Attachment Device:
Variance Request Form, page 4
Version 6 July 2009
Provide No. 9 staple with a minimum length of 1 1I2 inches (38.1 mm) or other approved
attachment device (e.g., plastic tic).
Installation
Install in locations as shown on the plans or as directed. Class B synthetic filter fabric
may be used without the woven wire fence backing, subject to the following conditions:
maximum post spacing of 6 feet (1.8 m), fabric is approved by the Designer, and post
spacing is inclined toward the runoff source, at an angle of not more than 20 degrees
from vertical. Install post with no more than 3 feet (0.9 m) of the post appearing above
,;round. Overlap filter fabric a minimum of 18 inches (457.2 mm) at splice ,joints. Install
fabric that is free of defects, rips, holes, flaws, deterioration, or damage.
1llaintenance and Removal
Maintain the silt fence until the project is accepted or until the fence is removed.
Remove and replace deteriorated or ineffective filter fabric. Remove and dispose of silt
accumulations in accordance with Section 1630 of the NCDOT Specification book when
necessary or as directed. Leave silt fence in place until site stabilization and remove at
project completion. Removed silt fence becomes the property of the Contractor. Dress
and seed and mulch all areas where silt fence is removed in accordance with the
permanent seeding specification.
5. Please provide an explanation of the following:
(1) The practical difficulties or hardships that would result from the strict application of this Rule.
The Podgers proposed swimming pool could not be constructed if strict application
of the rule were applied to this location, because there are no other practicable
alternatives due to local zoning setbacks and topographic constraints.
(2) plow these difficulties or hardships result from conditions that are unique to the property
involved.
Unique circumstances to the proposed project and existing conditions at 133
Castlefern Drive present hardship that is impossible to overcome without proposing
to impact a portion of the Neuse River buffer.
The Podger's proposed pool will require headwalls and braces to safely construct the
pool due to topographic constraints. Most of the pool and patio could be sited
adjacent to their existing decks on the backside of their home and almost completed
removed from the Zone 2 of the Neuse Buffer, however unique to this property are
the Town of Cary's building setbacks. Per the letter from Rising Sun Pools, Inc., tlae
Town of Cary requires a 10-foot, minimum setback for retaining walls from an
existing structure, and the proposed retaining wall needed to construct the patio
safely is located 10.25-feet and 11.27-feet from the western wooden deck and eastern
wooden deck, respectively. As well, the concrete patio of an in-ground swimming
pool is required to be set 5 feet at least 5-feet from the property boundary, and the
proposed pool layout is 5.44-feet from the eastern property boundary. A shift
Variance Request Form, page 5
Version 6 July 2009
westward would impact more area of the Neuse Buffer than is currently proposed.
An alignment further away from the house and in a flatter section may not require
the extent of headwalls, however it would increase the buffer impacts and impact
zone I and zone 2 of the Neuse Buffer.
The proposed pool location currently meets the minimum setback distances required
and is oriented to have the least impact to the Neuse Buffer.
Per the letter from Rising Sun Pools, Inc., in order to further avoid encroachment
into the Neuse Buffer the Podgers are proposing to add braces instead of a retaining
wall on the backside (creekside) of the pool. They are also proposing to install more
expensive entry steps into the pool which fall within the perimeter of the pool rather
than jutting out toward the property boundary and reduces the overall buffer
impact.
(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.
Part 3: Stormwater
1. Provide a description of all best management practices (BMPs) that will be used to control
nutrients and sedimentation impacts associated with the proposed activity. Please ensure to
include all applicable operation & maintenance agreements and worksheets for the proposed
BMPs. Also, include the BMPs on your plan sheets.
Nutrient Offset: An above ground cistern system, the FreelFlo model, is proposed
which would capture 840 square feet, to offset 727 square feet of impacts to "Lone 2
of the Neuse River riparian buffer. The cistern system will consist of two 300-gallon
cisterns (600-gallon total), that will capture front and back parts of the roof at the
Dodger residence at 133 Castlefern Drive, Cary, NC (see survey/ aerial photo
enclosed / proposed gutter routing).
The appropriately sized gutters from the front half and back half roof areas will be
combined into one downspout, which fill both of the 300-gallon cisterns which will
be linked together. The overflow pipe will consist of (2) 2" diameter pipes for a
total of 4", which will be directed to a soaker hose that will aligned parallel to the
riparian buffer. There will be no first flush system, but there will he a pump and
control system in the first 300-gallon cistern tank, which will be utilized to pump to
dedicated, year-round uses (see specifications for the FreeFlo model enclosed).
The cistern will have two, year-round dedicated uses. 1) The pump will be used to
supply the make-up water for the proposed pool to be installed. The proposed pool
will hold up to 21,000 gallons and will be filled year-round (see pool specifications
enclosed). It is expected that water from the cistern will be routed to the pool's
mechanical and biological filtration system before being used for make-up water. 2)
The second year-round dedicated use will be for use in cooling bulk piles of mulch,
Variance Request Form, page 6
Version 6 July 2009
associated with the Podger's landscaping business. Mulch piles can create
extremely high internal temperatures due to the insulating nature of the mulch
associated with compaction, which can in turn lead to a real fire danger, already
experienced by the l'odger's this past January. Mrs. Dodger's son is in the process
of purchasing a water truck that will be used to transport water from the (2) 300-
gallon cisterns to the Podger's mulch piles for use in cooling and maintaining safe
temperatures within the mulch piles.
Sedimentation Remediation: A riparian buffer restoration plan (described below
under Part 4: Proposed Impacts and Mitigation) along with proper sedimentation
and erosion control measures are proposed to be utilized to control impacts
associated with the proposed pool installation. The proposed silt fence
requirements are described in detail below. This is a preliminary plan at this point
and can be refined as the project progresses.
Erosion Control I Silt Fence : Furnish material, construct, maintain, and remove
temporary silt fence in locations shown on the construction plans or in locations
that require surface drainage to be filtered. This plan can be detailed more specific
as project progresses.
2. Attach a description of how diffuse flow will be maintained through the protected riparian
buffers. Please ensure to include all applicable operation & maintenance agreements and
worksheets for the proposed diffuse flow measure(s). Also, include the diffuse flow measure(s)
on your plan sheets.
A riparian buffer restoration plait (described below under Part 4: Proposed Impacts
and Mitigation) along with proper sedimentation and erosion control measures are
proposed to be utilized to control impacts associated with the proposed pool
installation. The overflow pipe will consist of (2) 2" diameter pipes for a total of 4",
which will be directed to a soaker hose that will aligned parallel to the riparian
buffer and provide diffuse flow during overflow events.
3. What will be the annual nitrogen load contributed by this site after development in pounds per
acre per year without structural BMPs (stormwater pond, wetland, infiltration basin, etc)? Attach
a detailed plan for all proposed structural stormwater BMPs.
* See Nitrogen Export .Spreadsheet Calculations Enclosed*
Drainage Size of Post-development BMP nitrogen removal Final Final
basin drainag nitrogen6loading efficiencys nitrogen6 nitrogen6
e basin rate without BMPI (%) loading loading
(ac) Obs/ac/yr) rate from
(Ibs/aclyr) drainage
basin bs
l 0.02 21.2 New Impervious: 727 s.f 0 0
Capturing: 840 s.f.
2
Totals ------ ------ 0 0
Variance Request Form, page 7
Version 6 July 2009
a Attach calculations and references.
s Attach calculations and references.
6Include Phosphorus in the. Tar-Pamlico Basin
4. Attach all applicable supplement form(s) and Inspection and Maintenance (I&M) Form(s) to this
completed application. The applicable supplemental form(s) and I&M form(s) for the proposed
BMPs noted in your application can be downloaded from the following website:
http fih?q,en? St<?t' n? us/suil?rnl? fcnms,htm
Please see the Rainwater Harvesting Supplement and Operations and Maintenance
Agreement for the Cistern System form enclosed.
Part 4: Proposed Impacts and Mitigation
Provide a description of how mitigation will be achieved at your site pursuant to 15A NCAC 2B.0242
for the Neuse Basin and 15A NCAC 26.060 for the Tar-Pamlico Basin.
If buffer restoration is the method you are requesting, be.sure to include a detailed planting plan to
include plant type, date of plantings, the date of the one-time fertilization in the protected riparian
buffers and a plan sheet showing the proposed location of the plantings. A guide to buffer restoration
can be downloaded at the following website: http://www.nceet).net/news/reports/biiffers.pdf
If payment into a buffer restoration fund is how you plan to achieve your mitigation requirement, then
include an acceptance letter from the mitigation bank you propose to use stating they have the
mitigation credits available for the mitigation requested.
Riparian Buffer Restoration Plan
The purpose of this restoration project is to create and maintain a buffer zone along the
backside (creekside) of the proposed swimming pool. The riparian buffer zone will help
control sediment and nutrients from entering the irrigation pond and thus help maintain
good water duality. This is a preliminary planting plan at this point and will be refined
pending discussions with Mrs. Amy Chapman, DWQ Riparian Buffer Specialist.
'Hie proposed riparian planting plan will be developed by integrating the native plant
species observed within the riparian buffer area, along with selected species known to
inhabit the Piedmont Bottomland Forest community type as described in Classification
of the Natural Communities of North Carolina (Schafale and Weakley, 1990) and
procedures outlined in Guidelines for Riparian Buffer Restoration (NCEEP 2004) to
institute species diversity. The restored riparian zone will be planted with bare root
seedlings and/ or containerized material consisting of Flowering Dogwood species as
outlined in the planting plan provided by Mrs. Carolyn Podger, and approved by Mrs.
Amy Chapman.
Part 5: Deed Restrictions
By your signature in Part 6 of this application, you certify that all structural stormwater BMPs
required by this variance shall be located in recorded stormwater easements, that the easements will
Variance Request Form, page 8
Version 6 July 2009
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 6° Applicant's Certification
print or type name of person listed in
]'art 1, Item 2), certify that the in ormat'Pon 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 ill
accordance with Art S of this fopp will be recorded with all required permit conditions.
Sigllature:
Date:
Title:
Part 7e flan Sheets

Be sure to include a copy of all of your completed application form, plan sheets and maps in /adobe
(pdf) format on a CD or floppy disk.
V117811Ce (tcducst F0111i. page 9
Version 6 July 2009
Part 8: Checklist
A complete application submittal consists of the following components. Incomplete submittals will
be returned to the applicant. The complete variance request submittal must be received 90 days prior
to the EMC sleeting at which you wish the request to be heard. Initial below to indicate that the
necessary information has been provided.
Applicant's Item
Initiallsj
A_-__/ _ - ® Original and two copies of the Variance Request form and the attachments
t l listed below.
.. a A vicinity map of the project (see Part 1, Item 5)
® Narrative demonstration of the need for a variance (see Part 2)
® A detailed narrative description of Stormwater treatment/management (see Part
4)
-_., - -- ® Calculations supporting nitrogen (phosphorus in the Tar-Pamlico Basin)
loading estimates (see Part 4)
/ e Calculations and references sUppOrtlllg nitrogen (phosphorus in the Tar-
-- Pamlico Basin) removal from proposed BMI's (see Part 4)
® Location and details for all proposed Structural stormwater BMPs (see Part 4)
m Three copies ofthe applicable Supplement Form(s) and I&M Form(s) for each
BMP and/or narrative for each innovative BMP (see Part 4)
® Three copies of plans and SI1eCilIUItu0nS, irlClUding:
_ ...................... 0 Development/Project name
0 1:1111gnneer and firm
0 Legend and north arrow
P
/
y
UJ[?c( rc.?, ? I?rV
0 Scale (1" == 50' is preferred) O
0 Revision number & date
0 Mean high water line (if applicable)
0 Dimensioned property/protect boundary
0 location map with named streets or NC State Road numbers

................ - - - 0 Original contours, proposed contours, spot elevations, finished floor
elevations
_..................... _.... 0 Details of roads, parking, cul-de-sacs, sidewalks, and curb and gutter
0 Footprint of any proposed buildings or other structures
0 Wetlands delineated, or a note on plans that none exist cs?rert k S40LO
0 Existing drainage (including off-site), drainage easements, pipe sires,
_-------- .__......______-.... runoff calculations
0 Drainage basins delineated
-- ...................__f......... 0 Perennial and intermittent streams, ponds, lakes, rivers and estuaries
0 Location of forest vegetation along the streams, ponds, lakes, rivers and
estuaries
Variance Request Form, page 10
Version 6 July 2009
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[,own of Cary - Online Map
Page 1 of 1
DISCLAIMER: The information contained on this page is NOT to be construed or used as a "legal description". Map information is
believed to be accurate but accuracy is not guaranteed. In no event will the Town of Cary be liable for any damages, including loss of
data, lost profits, business interruption, loss of business information or other pecuniary loss that might arise from the use of this map or
the information it contains.
http://209.42.194.57/CaryMap/ViewMap.aspx?ItenilD=11 &PortalID=1 4/18/2010
Permit No.
0o be provided by OWQ)
OF W ATh
FWA
NCDENR °
STORMWATER MANAGEMENT PERMIT APPLICATION FORM
401 CERTIFICATION APPLICATION FORM
RAINWATER HARVESTING SUPPLEMENT
This form must be filled out printed and submitted.
The Required Items Checklist (Part 111) must be printed, filled out and submitted along with alt of the required information.
11. PROJECT INFORMATION !-
Project name Podger - Buffer Variance Request
Contact person Owner: Carolyn Podger I Consultant: Kevin Yates
Phone number Carolyn Podger: 919.467-3544 1 EcoEngineering; 919-361-5040
Date 4!1612010
Drainage area number # 1
II.` DESIGN INFORMATION
Site Characteristics
Captured Horizontal Surface Area of Roof 840 fe
Are you in Coastal County SA waters or ORW Areas? No Fill out Non-SA Watersl0ther Section

Storage Volume: Non-SA Waters i Other
Design rainfall 1 in OK
Rain Harvesting Volume Provided (Must include a factor of safety at
80'2 Cistem Volume Must be at least 1.2x Design Rainfall
least 1.2x design rainfall) Runoff
Rain Harvesting Volume Provided 599.98 gal

Storage Volume: SA Waters & Saltwater ORW Areas
Runoff Volume generated from 1.5" fe
1-yr, 24-hr rainfall depth at your site in Do not fill out this section
Pre-Development 1-yr, 24-hr Runoff fe Do not fill out this section
Post-Development 1-yr, 24-hr Runoff fe Do not fill out this section
1-yr, 24-hr Runoff Volume Post-Pre 0.00 ft3 Do not fill out this section
Use 1.5" or Pre/Post? Do not fill out this section

Volume of Rainwater Harvesting System Provided

Rain Harvesting Volume Provided at Site
80.20
fe Minimum Rainwater Harvesting Volume must be at least
1.2 times the Runoff Volume
Factor of Safety 1.20 OK
Rain Harvesting Volume Provided 599.98 gal
Form SW401-Rainwater Harvesting-Rev. 3 Parts 1.8 It. Design Summary, Page 1 of 3
Permit No.
(to be provided by DWQ)
% Runoff
% Runoff Used On-Site
Primary Method Used On-Site
% Runoff Treated On-Site
Primary Method of Treatment
% Runoff Infiltrated On-Site
Total Runoff Accounted for
Water Balance Calculations Attached?
Cistern Overflow, Gutter, & Gutter Downspout Sizing
Closest City
Captured Roof Area
Overflow Pipe Diameter Needed (in Dec. Inches)
Maximum Captured Area for above Overflow Pipe
Guttering
Number of Gutters Total
Do you have a plan details showing numbered gutters?
Do you have a detailed table showing slopes of all gutters?
Do you have a detailed table showing diameters of all gutters?
Do you have a detailed table showing downspout dianWer of all
gutters?
Do you have a detailed table showing maximum captured area for
all gutters?
Additional Design Elements
Have you modeled this system using a water harvesting model?
Days to Draw Down Rainwater Harvester
Overflow discharged to:
Does the overflow discharge directly to impervious surfaces?
What is the overflow velocity for the 10-year storm?
Is the overflow velocity non-erosive
Is a First Flush Diverter Used?
If First Flush Diverter used, where is bypassed water discharged to?
Actual City
Closest City
Average Annual Historic Rainfall at your Site
Percent of Rainfall that will Overflow Cistern
Additional Design Elements
Which Model?
Does this cistern have a dedicated year-round use?
Screen Sizing at Entrance to Rainwater Harvester
Do you have a secondary water supply to the rainwater harvester?
Plans for the footing included in submittal?
Is the cistern buried?
Pump provided? What is the pressure?
What are the designated uses of the pump?
Are Pump Sizing Calculations Attached?
Is Cistern Metal?
If Metal Cistern - Is Waterproof Bladder Provided?
If the only use is irrigation - are plans provided?
Labeled as non-potable water?
100 %
I make-up/ watering off-site mulch

100 %

Raleigh
840 fe
(2) 2' pipes in
840 fe

2 gutters
No
No
No
No
No

Yes
5 days
Vegetated Area
No
1.49 Pis
Yes
No
None of the above
Cary
Raleigh
46.49 in
-1 %

FreeFfo
Yes
3.18 mm

No
OK
OK
Please attach a table showing Gutter numbers, slopes,
diameters, downspout sizing and areas going to each
gutter
Please include plan details showing numbered gutters
gutters
gutters
Please include a detailed table showing downspout
diameter of all gutters
Please include a detailed table showing maximum
captured area for all gutters
' , be Pra.s?ea to d ,?a.tad
OK
OK
OK
-15 See Ames
Please provide calculations to show non-erosive
velocity
OK
OK
Size needs to be less than 1 nun
Design for footing must be provided if the load of the
cistern at full capacity is greater than the soils will
No support t
?` a btr f ,JJYAG4t v{\ Ae,)r,,XP? ?(1?r
No OK l 9
Psi
to Pool l water truck for mulch
No
No OK
N/A OK
Yes OK
Form SW401-Rainwater Harvesting-Rev.3 Parts 1. & It. Design Summary, Page 2 of 3
Permit No.
Are Local & State pumbing codes followed?
Does this roof area deduct BLIA from calculations of another BMP?
If so, what BMP?
Notes:
Yes
No
(to be provided by DWQ}
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Form SW401-Rainwater Harvesting-Rev.3 Parts I. & II. Design Summary, Page 3 of 3
Table 1: Determinina overflow pipe diameter for a aiven captured roof area (W) for select cities
Overflow Pipe Dia.
city 0.5 1 2 2.5 3 4
Asheville 38 '1157 720 1,170 1,740 3320
Boone 33 144 631 1,020 1,530 2,910
Charlotte 37 155 710 11150 1,720 3,280
Elizabeth City 32 132 603 981 1,460 2,780
Fayetteville 33 142 624 1,010 1,510 2,880
Franklin 38 165 724 1,170 1,760 3,340
Greenville 31 131 598 973 1,450 2,760
Raleigh 38 '160 715 1,160 1,740 3,300
Rock Mount 36 150 687 1,110 1,670 3,170
Wilmington 26 110 4913 310 1,210 2,300
Winston-Salem 1110 165 756 1,230 1,1330 3,490
Table 2: Determinina Gutter size for a aiven autter slope and caMured roof area V) for select cities
Gu tter Size for 1/2% Gutter Slope Gutter Size for 1% G
city 3" 4" 5" 6" 3" 4°
Asheville 21 G 457 794 1,210 305 618
Boone 139 401 697 1,070 267 568
Charlotte 213 451 784 1,200 301 640
Elizabeth City .18.1 383 665 1,020 255 543
Fayetteville 18 397 689 1,050 264 562
Franklin 4117 460 799 1,220 307 6x72
Greenville 1 9 380 660 1,010 253 538
Raleigh : 14 454 789 1,210 303 644
Rock Mount ?U6 436 75- 8 1,160 291 618
Wilmington 1A9 316 550 844 211 4/19
Winston-Salem 227 480 833 1,280 320 680
Table 3: Determining Gutter downspout diameter for a
given r r ured r(..` (ic) for select cities
Gutter Downspout Dia.
city 2" 3° 4"
Asheville TI ,1 2,790 5,840
Boone 302 2,450 5,120
Charlotte 902 2,750 5,760
Elizabeth City -/G5 2,340 4,890
Fayetteville _
i93 2,420 5,060
Franklin 920 2,810 5,870
Greenville 1,59 2,320 4.850
Raleigh 908 2,770 5,800
Rock Mount 872 2,660 5,570
Wilmington 632 1,930 4,040
Winston-Salem 11:)(30 2,030, 6,130
Permit No.
(to be provided by OWQ)
Ill:: ROUIRED ITEMS CHECKUST.
Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will
result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to
indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a
requirement has not been met, attach justification.
Initials
Ky1.
Xr
K
Pagel Plan
Sheet No.
Plans (1° - 50' or larger) of the entire site showing: J ?.cl r1, Le ? ra(„r(eJ g-
Design at ultimate build-out,
Off-site drainage (if applicable),e'4u°? eA °t ef
Delineated drainage basins (include Rational C coefficient per basin),
Rain Harvester dimensions,
Pretreatment system,
Any first flush bypass system,
Maintenance access,
Proposed drainage easement and public right of way (ROW),
Overflow device, and
Boundaries of drainage easement.
2. Partial plan (1" = 30' or larger) and details of rain harvester showing:
Maintenance access
Volume
Area overflow is directed to and appropriate details of overflow area including vegetation, seeding plan
and side slopes
Screen sizing
Waterproof bladder if applicable
Footings
Pump design and sizing
Guttering with sizing and slopes, overflows, and
Filter strip.
3. Section view of the roof and rain harvester (1" = 20' or larger) showing: (10 S 4-4 ? C
Pretreatment and treatment areas, and ? r awn ?r v"rtAvd L Y C' S
Inlet and outlet structures. (Z e .
Rain harvesters shall not be used for sediment and erosion control during construction.
--------- 5. A table of elevations, areas, gutter slopes, gutter and overflow dimensions, incremental volumes &
accumulated volumes for overall site to verify volume provided, F I
---- 6• ct "nq,
A construction sequence that shows how the rain harvester will be implemented on site. It
7' The supporting calculations.
- ---- $' A copy of the signed and notarized operation and maintenance (0&M) agreement.
g' A copy of the deed restrictions (if required), Aone !°e cvraeA Amfj be prd ?Je j i '
10. A soils report that is based upon an actual field investigation, soil borin s, and infilt ation tests. County
soil maps are not an acceptable source of soils information. ;14-- da,.T ct awe, 4v ? e4r -r
A copy of the printout from the water harvesting model used. Oe r.uia?a (e'eA
-...._......__ T 12 A copy of average annual rainfall at your site. 1 n 4 ?;fk3 ? e ? LIJ F
Form SW401-Rainwater Harvesting-lRev.3 Part III. Required Items Checklist, Page 7 of 1
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Since 1979
THE JOHN R. McADAMS COMPANY, INC.
AGENT AUTHORIZATION FORM
All Blanks To Be Filled In By The CurrentContract Purchaser
Name: Mrs. Carolyn Podger
Address: 133 Castlefern Drive, Cary, NC 27513
Phone: [phone] Project Name/Description: Pod
Project Number: SPEC-10030
Date: 04%0912010
I.S. Army Corps of Engineers
Attn: Jamie Shern
Raleigh Regulatory Field Office
3331 Heritage Trade Drive, Suite 105
Wake Forest. NC 27587
Re: Wetlands Related Consulting and Permitting
To Whom It May Concern:
Kevin Yates
1. the current property owner, hereby designate and authorize The John R. McAdams Company,
Inc. to act in my behalf as my agent in the processing of permit applications, to furnish upon
request supplemental information in support of applications, etc. from this day forward. The 09
day of An i1 2010.
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 The John R.
':McAdams Company, Inc. staff. You should call The John R. McAdams Company, Inc. to
arrange a site meeting prior to visiting the site6nature
?ti2 vc. yam! oc;? ?
Print Property Owner Cc: Ms. Cyndi Karoly
NCDENR-DWQ
2321 Crabtree Boulevard
Raleigh, NC 27604
- Neuse Buffer Minor Variance
C I V I L E N G I N E E R I N G • L A N D P L A N N I N G . S U R V E Y I N G
PO Box 14005 • Research Triangle Park, NC 27709 • [phone] • fax [phone]
www.johnrmcadams.com
Aare
100
rrsaecr No. SPEC-10030
Dodger - Neuse Buffer Variance
FILENA F.:
USGS EXHIBIT A
Y
d

i
SCALE:
1"=1000'

133 CASTLEFERN DRIVE A division of The John R. McAdams Company. Inc.

ENGINE@RS• pLANNBRS +SURYEYflR3 •
V
EN
IRONMENTAL

DATE: 04_09-2010
GARY, NORTH CAROLINA RRSKARCR TRIANG7J; PARK • CfIARW'RE
Mo Keddiaa Partway. BarEam K 27713
"G-M-5"S • a-J h,ay-ft&U ? • ucenat Pro.: c-oleo ,
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PROJECT No. SPCC-10030
'
Pod er - Neuse Buffer Variance
ECOEngineerin

E
tLt;Nn tE' SOILS EXHIBIT A
g
'

C7
sCALK:
1"=1000'
133 CASTLEFERNDtIVE A division of
lle John R. McAdams Company, Inc,
H ENGINEERS- PLANNER-SURVE
YORS?ENVIRDNMRNTAL

(/7
DATE: 04-09-2010 GARY, .NORTH CAROLINA RESEARCHTRIANCLE PARK • MARLOWE
1805 Xeddian Yark.ay, Durban NC 27913
600-"133.5646. www,jolvumcedems.rom. license No.: C-D203 ,
RISING SUN POOLS,,INC,
Pools and Spas
Raleigh North Carolina 27606
Phone: [phone]
To Whom It May Concern.

Rising Sun Pools is working with Christopher and Carolyn Podger to locate a swimming pool on their
property located at 133 Castlefern Drive in Cary. We discovered that the lot had a riparian buffer when
we attempted to secure a permit for the pool dig in December. Since that time, Mrs. Podger has spent
considerable time trying to find an alternative to placing the pool in the buffer. We tried to place this
pool in many other locations of the yard without any success. Unfortunately, due to the size and
topography of the lot, as well as setbacks required by the Town of Cary, we're not able to place the pool
outside of the buffer. The concrete around an in-ground swimming pool is required to be 5' off the
property line. The recommended, safe, minimum amount of concrete around this type of swimming
pool is 4' on the sides and 6-8' feet at the ends. This places the body of the pool a minimum of 11' from
the property line. As there is a significant elevation change in the yard and, due to the buffer, we don't
have the option of locating the pool at the bottom of the yard where there is less elevation change,
retaining walls will be required. The Town of Cary has a 10' minimum recommended setback of
retaining walls from the structure. Another consideration of the retaining walls is the recommendation
from a safety perspective to have a minimum of 5-6' of concrete walkway where there is a retaining wall
installed.
Mr. and Mrs. Podger are incurring a much larger expense than originally budgeted to hopefully find a
workable solution for all parties involved. The area we are trying to get approved has a significant
elevation change; within 20' of distance the yard drops approximately 61/2' in this area. There are a
few different ways of dealing with this when installing a pool. Our main issue is that we can't bring the
swimming pool wall any higher than 3' out of the ground from existing grade. Due to the 61/2'
difference we still need to cut on the upper side approximately 4' deep into the ground and build in
retaining walls to shore up the cut in the dirt. This is a huge elevation change. In order to keep from
having a retaining wall in the back of the pool and therefore creating less impact in the buffer, we need
to add extra braces to the back side of the pool to ensure the minimal patio does not settle over time,
even if the soil does. Another concession that the homeowners have accepted is to install a more
expensive step that uses some of the pool area instead of the standard step that juts out from the
swimming area- but this option allows the pool to be closer to the property line and use less of the
buffer area.
Please feel free to contact me if I can provide additional information.
Regards,
Josh Gadbois
Rising Sun Pools
919-851-9700 ext 222
[e-mail]
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PARTNERS, LLC.
BOM 2003 PAGE 1437 ?,?/,*?
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NC GRIO COORDINATES (NAD 271

N - 737177.651
E 2055655.620
REF: , 1998 PAGE 1012
1
X.
?u.
Above: Shown above is the approximate location of the cistern
system and gutter routing on the west side of the Podger home.
Permit Number:
(to be provided by DWQ)
Drainage Area Number:
Rainwater Harvesting System
Operation and Maintenance Agreement
I will keep a maintenance record on this BMP. This maintenance record will be kept in a
log in a known set location. Any deficient BMP elements noted in the inspection will be
corrected, repaired or replaced immediately. These deficiencies can affect the integrity
of structures, safety of the public, and the removal efficiency of the BMP.
Important maintenance procedures:
- The roof area will be maintained to reduce the debris and sediment load to the
system. Excess debris can clog the system and lead to bypass of the design
storm, and reduced reuse volume.
- To ensure proper operation as designed, a licensed Professional Engineer,
Landscape Architect, or other qualified professional will inspect the system
annually.
- The system components will be repaired or replaced whenever they fail to
function properly.
- If the outlet is metered, use must be recorded at a minimum of monthly. These
records shall be kept on site for inspection by DWQ.
The cistern design volume will be drawn-down (used) within 5 days to allow for
available volume in the system for the next rain event to be captured and stored.
The system will be inspected by the owner/ operator at least monthly and within 24
hours after each rain event. Records of operation and maintenance will be kept in a
known set location and will be available upon request.
Inspection activities shall be performed as follows. Any problems that are found shall
be repaired immediately.
BMP element: Potential problems: How to remediate the problem:
The entire system A component of the system is Make any necessary repairs or replace if
damaged or leaking. damage is too large for repair.
Water is flowing out of the Check system for clogging and damage. Repair
overflow pipe during a as needed so the design volume is stored
design rainfall or smaller properly without discharging during a design
(usually a 1" or 1.5" rainfall). storm.
Check that the pump is operating properly and
that the water is actually being used at the
volume designed.
If it is still not operating properly, then consult
an expert.
The captured roof area Excess debris or sediment is Remove the debris or sediment as soon as
Form SW401-Rainwater Harvesting O&M-Rev. l Page 1 of 3
Permit Number:
(to be provided by DWQ)
Drainage Area Number:
resent on the rooftop. possible.
The gutter system Gutters are clogged, or water Unclog and remove debris. May need to install
is backing up out of the gutter screens to prevent future clogging.
gutter system.
Rooftop runoff not making it Correct the positioning or installation of gutters.
into gutter system. Replace if necessary to capture the roof runoff.
BMP element: Potential problems: How to remediate the problem:
The pump Pump is not operating Check to see if the system is clogged and flush if
properly. necessary. If it is still not operating, then
consult an expert.
The overflow pipe Erosion is evident at the Stabilize immediately.
overflow discharge point.
The overflow pipe is clogged. Unclog or replace if it cannot be unclogged.
The outflow pipe is damaged. Repair or replace the pipe.
The secondary water Not operating properly. Consult an expert.
supply
The cistern Sediment accumulation of 5% Remove sediment.
or more of the design volume.
Algae growth is present Do not allow sunlight to penetrate the cistern.
inside the cistern. Treat the water to remove/ prevent algae.
Mosquitoes in the cistern. Check screens for damage and repair/ replace.
Treat with 'mosquito dunks' if necessary.
The screens and filters Debris and/or sediment has Search for the source of the debris/sediment
accumulated. Screens and and remedy the problem if possible.
filters are clogged. Clean/ clear debris/ sediment from screen or
filter. Replace if it cannot be cleaned.
Form SW401-Rainwater Harvesting O&M-Rev. l Page 2 of 3
Permit Number:
(to be provided by DWQ)
Drainage Area Number:
I acknowledge and agree by my signature below that I am responsible for the
performance of the maintenance procedures listed above. I agree to notify DWQ of any
problems with the system or prior to any changes to the system or responsible party.
Project name: Podger - Neuse Buffer Variance
BMP drainage area number: # 1
Print name: Carolyn P. Podger
Title:Owner
Address: 133 Castlefern Drive Cary North Carolina 275 13
Phone:
Signati
Date: April 16, 2010
Note: The legally responsible party should not be a homeowners association unless more than 50% of
the lots have been sold and a resident of the subdivision has been named the president.
I, .Jok, 5 C'4
1?0? ?, ca'e )_'A , County of
Carole, Pell,
day of ao/ p
forgoing rooftop management mainte
seal,
SEAL
a Notary Public for the State of
do hereby certify that
personally appeared before me this
and acknowledge the due execution of the
nance requirements. Witness my hand and official
My commission expires /*Ia 3 r 2? !
Form SW401-Rainwater Harvesting O&M-Rev. 1 Page 3 of 3