20031508 Ver 2_Major Variance_20080212

LMG
LAND MANAGEMENT GROUP irrc.
Environmental Consultants
February 8, 2008
TO: Ms. Amy Chapman
NC Division of Water Quality
1650 Mail Service Center
Raleigh, NC 27699-1650
RE: Gun Barrel Point Marina; Ocracoke Island, NC
Hyde County, NC
Tar-Pamlico Buffer Variance Request
Dear Ms. Chapman:
On behalf of Ruth Anne and Jack Wilson, I am submitting a General Buffer Variance Request for the
construction of a building on Ocracoke Island, NC. This building will include two apartments. The parcel is
located between NC 12 and Silver Lake in Hyde County, North Carolina. No wetland impacts are proposed
with this project. The proposed building, parking, and wastewater system would infringe upon
approximately 3,800 sf of Zone 1 buffer and 2,785 sf of Zone 2 buffer. The applicant agrees to make a
payment into the Buffer Restoration Fund to mitigate for these impacts.
Enclosed are the variance request form, site maps, stormwater plan, a copy of the improvement permit for
the on-site wastewater system, the CAMA Minor Permit, and a letter from DWQ stating that a variance is
required for this project. If you have any questions or require additional information concerning site
conditions or site plans, please do not hesitate to contact me. Thank you for your attention to this project.
Sincerely,
~~~
Kim Williams
Wetland Scientist
Encl.
C: Ms. Ruth Anne Wilson
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www.lmgroup.net • infoClmgroup.net • Phone: [phone] Fax: [phone]
3805 Wrightsville Ave., Suite 15, Wilmington, NC 28403 • P.O. Box 2522, Wilmington, NC 28402

OFFICE USE ONLY: Date Received Request # __
State of North Carolina
Department of Environment and Natural Resources
Division of Water Quality
"General" Major Variance Application Form -
From the Neuse and Tar-Pamlico Riparian Buffer Protection Rules for residential structures
on existing lots within the coastal counties as defined by the Coastal Area Management Act
(As approved by the Water Quality Committee. of the Environmental Management Commission on 5/9/2001)
Please identify which Riparian Area Protection Rule applies.
Neuse River Basin: Nutrient Sensitive Waters Management Strategy
Protection and Maintenance of Riparian Areas Rule (15A NCAC .0233)
Tar-Pamlico River Basin: Nutrient Sensitive Waters Management Strategy
Protection and Maintenance of Riparian Areas Rule (15A NCAC .0259)
NOTE:
To constitute a complete application, all of fhe information requested in this form must be
provided. Incomplete applications will be returned to the applicant. The original and two
copies of the completed "General" Variance Application Form and any attachments must be
sent to the DWQ 401/Wetlands Certification Unit, 1650 Mail Service Center, Raleigh, NC
27699-1650, 919-733-1786 to constitute a complete submittal. This form maybe photocopied
for use as an original.
Part 1: General Information
(Please include attachments if the room provided is insufficient.)
o [~?~~~ D
FEES ~ ~, 2008
Applicant's name (the corporation, individual, etc. who owns the project): ~~ ~A~Ra>~H
Jack and Ruth Anne Wilson
2. Print Owner/Signing Official (person legally responsible for the facility and its compliance)
Name: Ms. Ruth Anne Wilson
Title: owner of parcel
Street address: P.O. Box 2493: 146 Wildwood Drive
City, State, Zip: Manteo NC 27954
Telephone: [phone]
Fax: [phone]
3. Contact person who can answer questions about the proposed project:
Name: Kim Williams Land Management Group, Inc.
Telephone: [phone]
Fax: [phone]
Email: kwilliams(a~LMGroup.net
"General" Variance Application Form
Version 1: May 2001

4. Project Name (Subdivision, facility, or establishment name -consistent with project name on
plans, specifications, letters, operation and maintenance agreements, etc.):
Gun Barrel Point Marina On Silver Lake
5. Project Location:
Street address: 14139 Silver Lake Road
City, State, Zip: Ocracoke. NC 27960
County: Hyde County
Latitude/longitude: 35° 07' 40.699" N 75° 54' 54.781" W
6. Directions to facility from nearest major intersection (Also attach a map):
Intersection of Highway 12 and Silver Lake Road
7. Stream to be impacted by the proposed activity:
Stream name (for unnamed streams label as "UT" to the nearest named stream):
Silver Lake (connected to Tar-Pamlico River)
Stream classification [as identified within the Schedule of Classifications 15A NCAC 2B
.0315 (Neuse) or .0316 (Tar-Pamlico)] SC
8. Which of the following permits/approvals will be required or have been received already for
this project?
Required: Received: Date received: Permit Type:
CAMA Major
X X 9/27/07 CAMA Minor
401 Certification/404 Permit
X X 2/17/04 On-site Wastewater Permit
Active Connection to Sanitary Sewer System
NPDES Permit (including stormwater)
Non-discharge Permit
Water Supply Watershed Variance
Others (specify)
Part 2: Proposed Activity
(Please include attachments if the room provided is insufficient.)
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
2
of buffer impact in ft
The applicants propose to construct atwo-story building (65' x 31') on pilings that would
consist of two apartments (one 1-bedroom and one 2-bedroom). The proposed structure,
parking and wastewater system would infringe upon 3,800 sf of Zone 1 buffer and 2,785 sf
of Zone 2 buffer Please see attached project narrative for details.
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:
Aooroximatelv 70% of the uplands within the site are located within the Tar-Pamlico riparian
buffer There is not enough space outside of the buffer to situate a structure and/or the septic
system If the owners were forced to stay outside of the buffer, this site would become
unbuildable Please see attached project narrative for details.

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 project engineer has developed an engineered stormwater plan to control runoff created
from the project (enclosed)
4. Please provide an explanation of the following:
(1) The practical difficulties or hardships that would result from the strict application of this
Rule.
If the owners were forced to stay outside of the buffer this site would remain in its current
condition a parking lot for patrons using the pier on site The current use presents a financial
loss for the owners (see section 3 below) In addition the site is surrounded by development
and the conversion of it to residential development is in keeping with the overall land use of
the area.
(2) How these difficulties or hardships result from conditions that are unique to the property
involved.
This site is adjacent to the Tar-Pamlico River therefore riparian buffer rules apply to the site.
Because coastal wetlands extend to the western bulkhead approximately 70% of the
uplands within the site are located within the Tar-Pamlico riparian buffer. If the owners were
forced to stay outside of the buffer this site would become unbuildable.
(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 site is currently used as a parking lot for patrons using the pier that extends into Silver
Lake Average annual income from this use is $18 000. Since purchasing the tract, the
owners have lost money on their investment. The income generated from the proposed
development would be between 1 5 and 2 million dollars.
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): Kim Williams; Land Management Group, Inc.
Mailing Address: P.O. Box 2522
City, State, Zip: Wilmington NC 28402
Telephone: [phone]
Fax: [phone]
Email kwilliams(a~LMGroup.net
"General" Variance Application Form, page 3
Version 1: May 2001

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person listed in dart 1, item 2}, that the ~farrr+afiari i~dudec3 orr this permit a~ppfacatiarz
Earn is correct, that the project win be constrtx~ed in cort~rnance with the approved plans
and that the deed resbictions in accordance w~h Part 5 of this form wip be rectx'ded with all
required (/p~rtnit condition~s'".~
Date:. ~ - a
Title: ,..: , a .~ _,~ :~ a
idC Divisio» of wafter ~}uaBty (DWQ}
jt04 Wetlands Certit~caf~ drat
23'1 Ccablree Slvd. (Lt~C'ATION}
4650 Malt Service Center ~MAiLENu ADnRESB}
Raleigh, AIG 27fi9g-16513
(949} 733-9726 {phar~e}
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RALEIGH REGf3LATORY FIELD GEFICE
tJS Array Corps a# Eng+neers
65(18 Fat1s of the IVeuse Road, Sane 120
Fiae~, Plorth C3roticsa 27615
General Nurateer: {913) 876-£~1
http:Jlvrww.saw.usace-arrr-y.miflaa~itandslregtaur-htm
WASt-i11V:~Tt)N REGUIRTt~2Y FIELD OFFICE
US Army Corps of Engineers
most Ofi~ce BOx 10(}0
Washing, Itltrtlt Carotins 278840:10
Gers9tat t+lttt^t~r: [phone]
http:I/t~mvav.saw.usacP. army. m~lvaetlandsiregto~r, htm
yllashireg>•on t7istrict Offrce
Dives ~ Coastal ~--agernent
9d: Washington Square MaR
;fJashingtan, tdC 278$9
phone: [phone]-fi~{84
Mar+et-ead City ;3isirtct ~C+e
Division of CoaStai Management
15t•B t~nway 24
Ma ef~esd City, #VC 28557
phortie: 2; 21808-2808
"General- Variar-ce Appaca~ion Form, page 4
Version 1: May 2001

Part 2: Proposed Activity
Current Conditions
This 0.25-acre parcel is located in Ocracoke, North Carolina, between NC 12 and Silver
Lake. Silver Lake is adjacent to the Tar-Pamlico River, therefore, riparian buffer rules
apply to this site. A bulkhead separates uplands from wetlands on this site. Coastal
wetlands exist westward from the bulkhead and uplands exist from the bulkhead eastward
to NC 12. These uplands have been significantly disturbed for many years. Soil profiles
of the site were taken by a registered soil scientist to determine an appropriate location
for a septic system. These profiles identified sandy fill material approximately 30" deep
throughout the site. A CAMA Major Permit from 1991 indicates this area was used as a
spoil retention site for material dredged from Silver Lake. No vegetation currently exists
within the tract nor has existed for many years.
In addition to the bulkhead, current structures within the site consist of a wooden dock
that extends from the bulkhead into Silver Lake, a gazebo, another bulkhead constructed
along NC 12, and a small office located near the center of the property. The site is
currently used as a parking lot for patrons using the pier. The applicant has agreed to
discontinue commercial operations in connection with the pier prior to occupancy of the
structure.
Surrounding properties have already been developed. The road setback is 17' from the
centerline of NC 12. The front, side, and rear setbacks are 8'. The Town of Ocracoke
currently does not have any zoning for parcels and the maximum height of any building
in this area is 35'.
Proposed Project
The applicants propose to construct atwo-story building (65' x 31') on pilings that would
consist of two apartments (one 1-bedroom and one 2-bedroom). The proposed structure
will be 35' high (pilings- 9'; building- 26'). Six parking spaces would be provided on the

site and a small gravel driveway would extend from NC 12 to the parking area. A septic
system (1,125 ft2) is proposed adjacent to NC 12 and has already received approval from
the Hyde County Health Department. The Health Department determined that this was
the only area within the site that a septic system could be located. A Stormwater Plan for
this project has been developed. A LAMA Minor permit was issued by the Division of
Coastal Management for this project.
Buffer
There are approximately 8,543 ft2 of uplands within the tract, located between two
bulkheads. Average dimensions of the uplands are 64' x 135'. The size of the proposed
septic system is approximately 1,125 ft2 and its location is fixed. This site is adjacent to
the Tar-Pamlico River; therefore, riparian buffer rules apply to the site. Because coastal
wetlands extend to the western bulkhead, approximately 70% of the uplands within the
site are located within the Tar-Pamlico riparian buffer. In addition, most of the uplands
lie within the 75' Area of Environmental Concern.
There is not enough space outside of the buffer to situate a structure and/or the septic
system. Furthermore, there is not adequate space to locate them solely within Zone 2 of
the buffer. Infringing within both zones of the Tar-Pamlico riparian buffer is the only
option for the property owners. If the owners were forced to stay outside of the buffer,
this site would become unbuildable.
The proposed building, parking, and wastewater system would infringe upon
approximately 3,800 sf of Zone 1 buffer and 2,785 sf of Zone 2 buffer. To mitigate for
these impacts, the applicant agrees to make a payment into the Buffer Restoration Fund.
It should again be noted that this site is already significantly disturbed. No vegetation will
be removed in development of this project since none currently exists within the property.
The site contains sandy fill material that has been there for quite some time. It is currently
being used as a parking area for pier patrons.

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Jack and Ruth Wilson Land Management Grroup, Inc.
Gun Barrel Point Marina Environmental Consultants Vicinity map.
Ocracoke, NC Wilmington, N.C. Sheet ~ of ~ f
Tar-Pamlico Buffer Variance Request February 2008

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Jack and Ruth Wilson Land Management Group, Inc. Topographic map. Site located
Gun Barrel Point Marina Environmental Consultants in Ocracoke quadrangle.
Ocracoke, NC Wilmington, N.C.
Tar-Pamlico Buffer Variance Request February 2008 Sheet Z of

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Jack and Ruth Wilson Land Management Group, Inc.
Gun Barrel Point Marina Environmental consalrants Existing conditions
Ocracoke, NC Wilmington, N.C. Sheet 3 of
Tar-Pamlico Buffer Variance Request February 2008

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Zone 2 Buffer Impacts (2785 sf)
SCALE 1" = 20r
NOTES: Coastal wetland line determined by DCM.
Project engineer is Pate Engineering.
Ms. Ruth J. Wilson
Land Management Group, Inc.
Gun Barrel Point Marina
Environmental Consultants
Site plan
Ocracoke NC
Wilmington, N.C.
I
Sheet of
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Tar -Pamlico Buffer Variance Request
February 2008

~lov 16 07 12: 09p I s 1 and Oak Rea 1 ty 252 4"!;d 6555 p . 1
Hyde County
Washington Regional Office
CAMA
04-07
Permit Number
MINOR DEVELOPMENT
MIT ^~
PER
as authorized by the State of North Carolina, Department of Environment,
and Natural Resources and the Coastal Resources Commission for development
in an area of environment concern pursuant to Section 113A-118 of the
General Statues, "Coastal Area Management"
Issued to Mr lack and Ruth Wilson., authorizing development in Estaurine Shoreline located off highway 1 2
at Gun Barrel Point Marina on Silver Lake off the Pamlico Sound on Ocracoke Island, Hyde County, North
Carolina, as requested in the. permittee's application, dated 28 Au ust 2007. This permit, issued on 27
September 2007, is subject to compliance with the application and site drawing (where consistent with the
permit), all applicable regulations and special conditions and notes set forth below. Any violation of these
terms may subject permittee to a fine, imprisonment or civil action, or may cause the permit to be null and
void.
You are hereby issued a Minor CAI~IA Permit to constnrct a 65' x 32' two story building with associated
grave[ driveway/parking and septic system.
(1} All proposed development and associated construction must be done in accordance with the permitted
work plat drawings(s) dated 11-15-65.
(2) A!i construction must conform to the N.C. Building Code requirements and all other local, State and
Federal regulations, applicable local ordinances and FEMA Flood Regulations.
(3) Any change or changes in the plans for development, construction, or land use activities will require a
re-evaluation and modification of this permit.
(4) The applicant has effectively demonstrated, through innovative construction design, that the amount of
impervious surface areas may be e:cceeded in a way that nrnoff water will be managed and the AEC
protected, so as to allow 45 percent of impervious areas within the 75' Coastal Shoreline AEC. All
proposed development and associated construction must be done in accordance with the design
specifications of the permitted innovative design, sealed by Raymond G. Pate, on 1 U15/O5.
This permit acticn may be appealed by the permittee or other
qualified persons within twenty (20) days of the issuing date. Frcm
the date of an appeal, any work conducted under this permit must
cease until fhe appeal is resolved. I
This permit must be on the project site and accessible to the permit
officerwhen the project is inspected fcr compliance.
Any maintenance werk or project modificalian nai covered under
this permit, require further written permit approval.
All work must cease when this permit expires on
Decemher 3t, 2010
In issuing this permit it is agreed that this project is consistent with
the local Land Use Plan and all applicable ordinances.
This permit may not be transferred to another party without fhe
written approval of the Division of Coastal Management.
~~ Local_Ee fficial (signature)
~'
~` .~~ ~'
CAMALocal Permit Official
' e_(signature ~ conditions above apply to permit)

`lov X16 07 12:09p Island Oak kealty ~5~ `+f:~ b5~5 P•~
Mr. ,lack and Ruth Wilson
Miner Permit #04-07
27 September 2007
Paae Two
(5) The landotivner or permittee shall at all times provide the operation and maintenance
necessary] to assure the permitted stormwater system functions at optimum efficiency. The
landowner or permittee shall maintain the permitted stormwater system for the life of the
project.
(6) The discharge from the permitted stormwater system shall be a low velocity flow such that there is no
hydraulic excavation/scouring of the coastal wetland marsh. This permit does not authorize any
excavation' or filling of coastal wetlands marsh.
(7} ~Nitlun 30 days .of project completion, a letter of certification. must be received from the
designer of the innovative system installed, certifying that the permitted system has been
installed in accordance'with this permit, the approved plans and his design specifications. Any
deviations from the approved plans and specifications must be noted and may require a permit
modification.
(8) Prior to the initiation of any construction activities authorized by this permit, the permittee shall
coordinate with the N. C. Deparhnent of Cultural Resources (NCDCR}, in regard to the exterior
design of the proposed structt+re. Initiation of permitted construction activities shall not begin until
written approval is obtained from NCDCR, and a copy of such approval has been submitted to the
Division of Coastal Management Vlr'ashington Regional Office.
(9) This permit does not authorize development within any wetlands or open water areas.
(10} All unconsolidated material resulting from associated grading and landscaping shall be retained on site
by effective sedimentation and erosion control measures. Prior to any land-disturbing activities, a
barrier line of filter cloth must be installed between the land disturbing activity and the adjacent marsh
or water areas, until such time as the area has been properly stabilized with a vegetative cover.
(11) Any change or changes in the plans for development, construction, or land use activities will require a
re-evaluation and modification of this permit.
(12) Any further development ou this site such as the addition of walkways, piers, docks, bulkheads, riprap,
accessory• buildings, etc. will require notification of the Local Permit Officer before commencement.
(13) Note: All development -nust comply with the Tar/Pamlico River Basin Buffer Rules as stated in 15A
NCAC 1B.0259. Any questions regarding these rules should be directed to Mr. Kyle Barnes, Division
of Water Quality, Washington Regional Office, 2~2-946-648 ].

FROM Jack Wilson
FAX N0. 2524731187 Feb. 27 2004 12:08PM P1
HYDE ~OUIVTY HEALTH DEPARTMENT
P.O. Box ],00 Swan Quarter, NC 27885
Phone ~ [phone]
IMPROVEMENT PERMIT'
INITIAL INSTALLATION: XXX EXPANSION: REPAIR:
Permit NO: 21704-i
Permittee: Ruth Wilson
Date: February 17, 2004
Address: P.Q. Box 2493, Manteo, NC 27954
Phone No.: [phone]
Property Location: Parcel A, formerly Tract 12 Silver Lake Motel Tract, Ocracoke
Facilities to be served: i ~ 2bdr apartment; 1000 sq.ft. retail; real estate ofFce with 5
employees
Water Supply: community
Wastewater Flow GPD: 480 gpd
Wastewater System Type: Va.; Ecoflo Peat Biofilter System; IWWS-2000-3-R3
wastewater System Repair : same
Long Term Acceptance Rate: 1.0 gpd/sq.ft.
Absorption Area: 480 sq.ft.
Septic Tank Capacity: 1000 gallons with filter
IMPROVEMENT PERMIT
RUTH WILSON
PAGE 2
CONDIT'ION,~:
1. Installation of the wastewater system shall be in strict accordance with the

1. Installation of the wastewater system shall be in strict accordance with the
approved site plan and all specifications of this permit
2. The system shall be installed by a contractor authorized in writing by the
manufacturer, who shall coordinate the installation with the designer and
manufacturer's field representative. The manufacturer's field representative
shall provide written confirmation of their acceptance of the Ecoflo Peat
Biofilter installation and designer shall provide written confirmation of their
acceptance of the complete system installation prior to Operation Permit
issuance.
3. An on-site preconstruction conference shall be required to be attended by the
Ecoflo Peat Biofilter system designer, installer, Hyde County Health
Department, and property owner or their representative prior to construction.
4. The contractor shall coordinate with the Hyde County Health Department to
conduct the 24-hour leakage test on the septic tank.
5. "The estimated life of the peat media is currently 8 years. The media may
need to be replaced, in part or in full, in order to maintain specified treatment
standards."
6. Use water conserving fixtures i.e. 1.6 gallon flush toilets, 2 gpm shower
heads, i gpm all lavatories.

This Ymprovement Permit shall be valid:
Without expiration
upon a showing satisfactory to the Hyde County Health Department that the site
and soil conditions are unaltered, that the facility, design wastewater flow, and
wastewater characteristics are not increased, and that a wastewater system can be
installed that meets the permitting requirements in effect on the date this permit
was issued. This permit is subject to revocation if site plans or the intended use
changes. _
Authorized Agent: ~--
Enviro mental Health S ialist
Hyde County Health Department

FROM Jack Wilson FAX N0. 2524731187 Feb. 27 2004 12:10PM P4
HYDE COl1NTY HEALTH DEPARTMENT
P.O. Box 100 Swan Quarter, NC 27855
Phone ~ [phone]
IMPROVEMENT PERMIT
INITIAL YNSTALLATION: XXX EXPANSION: REPAIR:
Permit No: 21704-1 Date: February 17, 2004
Permittee: Ruth Wilson
Address: P.O. Box 2493, Manteo, NC 27954
Phone No.: [phone]
Property Location: Parcel A, formerly Tract 12 Silver Lake Motel Tract, Ocracoke
Facilities to be served: 1 @ 2bdr apartment;1000 sq.ft. retail; real estate office with 5
employees
Water Supply: community
Wastewater Flow GPD: 480 gpd
Wastewater Syrstem Type: Va.; Ecoflo Peat Biofilter Sysfiem; IWWS-2000-3-R3
Wastewater System Repair : same
Long Term Acceptance Rate: 1.0 gpd/sq.ft.
Absorption Area: 480 Sq.ft.
Septic Tank Capacity: 1000 gallons with filter
Pump Tank Capacity: NA
Total Bed/Trench Length: 31.5' ; 31.75 Width: 17.43' ;13.53'
Bed/Trench Spacing: NA
Maximum Bed/Trench Bottom Depth: 2.42' as specified on the attached site plans

FROM Jack Wilson FAX N0. 2524731187 Feb. 27 2004 12:1aPM P3
AUTHORIZATION FOR WASTEWATER
SYSTEM CONSTRUCTION
RUTH WILSON
CONDITIONS:
1. Installation of the wastewater system shall be in strict accordance with the approved
site plan and all specifications which are a part of this permit.
Z. Prior to stallation of the wastewater system, an onsite preconstrucrtion conference
shall be Id and attended by the installer, Hyde County health Department, and the
owner or o er's representative.
3. The manufacturer's field representative shall provide written confirmation of their
acceptance of the system installation prior to Operation Permit issuance.
4. "The estimated life of the peat media is currently 8 years. The media may need to
be replaced, in part or in full, in order to maintain specified treatment standards."
5. Use water conserving fixtures if not already present i.e. 1.6 gallon flush toilets, 2
gpm shower heads,l gpm all lavatories.

This Authorization For Wastewater System Constrvct~iion shall be valid for 5 years from
the date of issuance.
~~
Envi nmenial Healtf~ 'list ate

FROM Jack Wilson FAX N0. 2524731187 Feb. 27 2004 12:09PM P2
HYDE COUNTY HEALTH DEPARTMENT
P.O. Box 100 Swan Quarter, NC 27885
Telephone No. (2S2) 9Z6-4360
DIVISION OF ENVIRONMENTAL HEALTH
AUTHORIZATION FOR WASTEWATER
SYSTEM CONSTRIJCTlON
Installation: X)OC Expansion: Repair:
Permit #: 217041
Owner: Ruth Wilson
Address: P.O. Box 2493, Manteo, NC 27954
Phone No.: [phone]
Date: February 12, 2004
Property Location: Parcel A, formerly Tract 12 Silver lake Motel Tract, Ocracoke
No. of Bedrooms: 2
Business (No. of people, seats, etc.) ;1000 sq.fl. retail space; real estate office with 5
employees
System Classification: Va., IWWS-2000-3-R3
Wasbeuvater Flow: 480 gpd
Water Source: community

dug 21 07 07:54a Vandeventer Black LLP 2522618444
Hyde County Dep
172 Main Street
Font Office Box 95
Swan Quarter, NC 27886
Office 926-4372 Fan 926-3701
hydeiruepectioonsCGyahoo.com
~artment of Inspections
Jerry Hardison
ChiefBu11d1»g In9pector
Nat vanNartwfck
Ucracake Belding Inepectar
May 29, 2007
NCDEFMR
943 Washington Square Mall
Washington, NC 27$89
Attn: Steve Z'rowell
We are in receipt of an application for a building pcrtnit from Steve Wilson for a two
family residence at 458 Irvin Garnish Highway. We also have a letter stating that 6efarc
the building is occupied all commercial operations will cease in connection with the pier.
The ptoposed structure is in compliance with the Ocracoke Development Ordinance,
including all set backs excluding the deeded property to the center line o f Irving Garnish
Highway.
Sincerely yours,
Nat van Nortwu'ick, Building Inspector/Gcrucvke Development Officer
p.2

Flugr Z 1 07 07: 54a Vandeventer H l ack LLP ~b~~b 111444
JAN 03,2006 04:57p ISLAND OAK REALTY INC 1252973655500
61/6/2896 04:63 252449853Q OGDENIH-E
I P. B.oby, Ga~wrmlx
C. ~~ SecNE67Y
~. ~-. ter sasex7y
22; 20p5
p .:~
page 1
PAGE 81
C+~cs of ~.7~1eri sod tli7lvry
DF-is'oe of Hi4aiaJ t<~oarae
Davis acoak, Drlxmc
Steve Tt'omeIl
Dioisioa aF Co7>;etael Mau~eutevt _
7: Peter Sandbeclr ~~.-
llfinot CAMA Permit fot Rvch and J~ W71son, Guu 8acret Point oa SiFvec La1~, Oc>•smke,
FIpde Oountq, TER05-i 604
mctnonaduwa is to iafoRlt7. you that we hlsve worked avith Ru7h' snd Jsck Wilson aad with their dcsi,~u,
E Ihk, on the plans for the pcapoa4d residence at Gua )ja7xel Foiflt on Siloe: Lake is the Oeracoloe
Itic Diatrics. Ms. hale bvs eigru6caadytevised the plans that were pre4ioualy submitted and has wodsed
ly avith nq to devrlop pfaas that arc acceptable to both hea cheats sad this agency.
ps of the final plans sad tlcvadons are attached 6or your 9cs. If the house i, bw7t in 7-ccordaace with the
)ed pla7ss, the new conatcuceion an71 be compatible anith the character of the Nationol Register-lietcd
do district so;d not ad~CSStIy sBcct it.
e cc-fltaet Renee Giedhtll-Ear7lrp, our caviroaa7entsl revie9v coordaeator, ac 919-733-47da if you h~ anp
iota cooeemiag this matter,
bmencs
Linda ihle ~~ ~~~
Ocracoke Prescz,ratioa Socictp
r~~' l - S"~ y~
Noah Carol>~na DCpartmeot of Caltural ~teaaurces
5bk 8ietarle Prea~otloe UlBloe
Arta [f.9®11.+sk ~e~W~a~s
>„~
'IA')ION
V b PGIPIN @7(:
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S07 k. B~aim7 Sltwc R~In~. NC
f Is N, Bb~ 9a~.1 Rtloi~p NC
S IS N. Dlo~¢7 Stroal IWtiDy,NC
~~ ~o~
eb l7 Mrl 9wio~ Cma~ RYdg- KC 2769P-t lei 7
+~11 Mdl Soria Cc+~cL A~41)p~ NC I~eW ~~
bl' PK^1 Snvia c~ev, aadwA w~ non
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01/13/2004 11:41 12529872012 PAGE 01/01
FROM Jack W i 1 sore F(aY; NU, ?54731187 ..Ian, ie ce~y w• ~~~~~+ r
`~'', r ~ ''. (} Micntilel F', ft,1~ll,y. Ciiitii'r~G~l
~ ~ R'ilil~;m(~.lZr~ach'„Sr.iaecir~+
~~~ \'v ~ ~~c,nh f,'wc,'~~:: ~r~:,rlm~m: nt En vi ouTrmnr,d Ni:ui~d ~c5uUritts
~ T J+ A!an Kllln~;~, P.L., pircut~r
~y~7 ) ` /]~ /~A~, / Dlhcam A~ Walrr (•1,,;,lily
/~"/ [~ ~/'~~! ', C-~~ ~/'`!' ~`Gr/~!V C~ J,[I ~`'v ~/I~ -olecn Fl, Sullies, Deputy Dircc~ur
I)i~ixion of waiox Qua;;ry
peternber 22, 2003
DWO # 03-158
CIRTIFI~D MAIL-RETURN F~ECEIRT REQUBSTBD Hyde County
Ms. Ruth Jolly Wilson
P.O. Box 24®3
Martt9o, NC 27@64
D(~r MS. Wilson:
...1'hp. Qivisian _M W.axar Q,~a~,i~ ham. fevlowed your plans..for tlTe .disCf~ar~r~..of..fiJl. matar4pJ..jnto an ..
unspecified arnaunt of protected riparian buffers ~ locst+ad at 14139, SilvQr Lake Raad in Ocracoke in
Hyde Court'ry far commercial development and #nstailation of s septic tank and dr~n field. In>3ufficient
evidence Is present in our tiles to cor,ctuds that yr,ur Prgi®ct must D6 built as planned fn the protected
krutt®rs #n aaoordance wJth 15A NCAC 2hl .t7~58. Furthermor®, the proposed Impacts will require a
Ma)er Varsanoe item the NC Environmental Management Commission slncg yo have proposr>:d
impESat~ in Zone 1 (within ap fact of the age of zhe r!parian.t;t~tfet), it your prb)ecx cart be redesigned to
Only impact Zone 2 (beyond 3U f(~t from the ec~9® of the riparian buffer), than pWQ staff have ih6
authority t0 Issue a Minor Variance tot' fife project. therefore, unless modifloations of the proposal ar®
made as' dr~scrlbsd be#ow, we cannot approvL your project will place this pro}eri on hold as incomplete
until we receive this additional iniarrnatfan.
Please provid® us with information supporting your posltlart thaat states your project must be
constructed as planned grid tint you have no practicable afternaUve to placing fill #n these waters
andlor wetlBndS. Specifically c®n you redsSi7n your projQCt as outlined a6ovo? Any documentation
such as reaps and narrative that you can supply to address altematirre designs for your project may be
helpful in our review of your app~catlon. Also this project will require compensatory mitigation as
descrJbad in 15A NCAC ~H .02$9 for th® Ar)inor or MaJor Varianoo. Your mitiys~tia„ ~ropD9al is
insufficient because non®wac proposed. In tu~lition, stOrnnuater rnanagem®nt will be needed for than
new development. Your proposal• to '~iivort the runoff from thra building caves to file highway' is not
eoosptable since this will not r~eult in trlaatmexlt of the starmvvatar runoff beforo it erners d4Wnstream
waters. Frl~lly p1~36 specify tFte ex>ect amount and IQOation of impgCt to the buf(~rs in your response.
Please r®sp~nd~wlthin thr®e weeks of t#~e~date of this letter by sanding a Dopy of this information
tb me and, one ropy to Wastlington Regional C7ffice. If we do eat hear tram you In three weeks; we will
assume that you no loner want to pursue tl'r4s project and wa will consid®r the, project as withdrawn. I#
you riavg any questions, pl®ase telephoR® John Domay at 818-733-1788 or Tom St®ffens In our
Wa6hinaton Regbnal Uffia~ ut 252-846-6481.
cat~an Program
cc: Washington bW0 R,mpional Office ~/
Central Files
Fie Cop
...,~....,..~.~-.ro...--.-..- ~.... - - ..~.~~ ...
i
N. C. Atvlslon df Wae~r Quality, 401 WptlBo~tu Certifi:acon lJoic,
1650 Mail S~rvicr Cara, RaIGi~, NC 27691x• ] bso (Mailra~ Addross)
:2321 CnbtrFe Blvd., Rulagh, IVC 27604-~0 U.,ocntioa)
C9 t9}'133-1786 (pha+a), 919.733~i893 (fax), (kup~/IIt7o.Snrarnte.ee.ualnarrctlende

Stormwater Design
For
Jack and Ruth Ann Wilson
Ocracoke Island
01/31/08
os~nd~r~,~e®
~, y
or
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i m ~,~
m . ~; -~ ~~~L c o
G~ ® ~ ~'J`3 i3
~, ®m ~~ A on 00
o 'W~~•+,
~~, ~..y~~ sa~~.l 01 X11:®• ~~o,®
~^® A~, ~~1~~ ~a.Q®e®®
~sJ~ dQ60G9~i93'~00®
Prepared by:
Pate Engineering and Land Surveying, P.C.
119 Wood Hill Drive Unit 8
Nags Head, NC 27959
P.O. Box 1808
Ref No.: OS-554

~LL.
Stormceptorm
Stormceptor Sizing Detailed Report
PCSWMM for Stormceptor
Project Information
Date 1 /8/2008
Project Name Wilson Project
Project Number N/A
Location Ocracoke, NC
stormwater Quality Objective
This report outlines how Stormceptor System can achieve a defined water quality objective through the
removal of total suspended solids (TSS). Attached to this report is the Stormceptor Sizing Summary.
Stormceptor System Recommendation
The Stormceptor System model STC 450i achieves the water quality objective removing 89%TSS for a
Fine (organics, silts and sand) particle size distribution.
The Stormceptor System
The Stormceptor oil and sediment separator is sized to treat stormwater runoff by removing pollutants
through gravity separation and flotation. Stormceptor's patented design generates positive TSS removal
for all rainfall events, including large storms. Significant levels of pollutants such as heavy metals, free oils
and nutrients are prevented from entering natural water resources and the re-suspension of previously
captured sediment (scour) does not occur.
Stormceptor provides a high level of TSS removal for small frequent storm events that represent the
majority of annual rainfall volume and pollutant load. Positive treatment continues for large infrequent
events, however, such events have little impact on the average annual TSS removal as they represent a
small percentage of the total runoff volume and pollutant load.
Stormceptor is the only oil and sediment separator on the market sized to remove TSS for a wide range of
particle sizes, including fine sediments (clays and silts), that are often overlooked in the design of other
stormwater treatment devices.
MATERIALS'

~l_.
Stormceptor°
(Small storms dominate hydrologic activity, US EPA reports
"Early efforts in stormwater management focused on flood events ranging from the 2-yr
to the 100-yr storm. Increasingly stormwater professionals have come to realize that
small storms (i. e. < 1 in. rainfall) dominate watershed hydrologic parameters typically
associated with water quality management issues and BMP design. These small storms
are responsible for most annual urban runoff and groundwater recharge. Likewise, with
the exception of eroded sediment, they are responsible for most pollutant washoff from
urban surfaces. Therefore, fhe small storms are of most concern for the stormwater
management objectives of ground water recharge, water quality resource protection and
thermal impacts control."
"Most rainfall events are much smaller than design storms used for urban drainage
models. In any given area, most frequently recurrent rainfall events are small (less than 1
in. of daily rainfall)."
"Continuous simulation offers possibilities for designing and managing BMPs on an
individual site-by-site basis that are not provided by other widely used simpler analysis
methods. Therefore its application and use should be encouraged."
- US EPA stormwater Best Management Practice Design Guide, Volume 1 -General
Considerations, 2004
Design Methodology
Each Stormceptor system is sized using PCSWMM for Stormceptor, a continuous simulation model based
on US EPA SWMM. The program calculates hydrology from up-to-date local historical rainfall data and
specified site parameters. With US EPA SWMM's precision, every Stormceptor unit is designed to
achieve a defined water quality objective.
The TSS removal data presented follows US EPA guidelines to reduce the average annual TSS load.
Stormceptor's unit process for TSS removal is settling. The settling model calculates TSS removal by
analyzing (summary of analysis presented in Appendix 2):
• Site parameters
• Continuous historical rainfall, including duration, distribution, peaks (Figure 1)
• Interevent periods .
• Particle size distribution
• Particle settling velocities (Stokes Law, corrected for drag)
• TSS load (Figure 2)
• Detention time of the system
The Stormceptor System maintains continuous positive TSS removal for all influent flow rates. Figure 3
illustrates the continuous treatment by Stormceptor throughout the full range of storm events analyzed. It
is clear that large events do not significantly impact the average annual TSS removal. There is no decline
in cumulative TSS removal, indicating scour does not occur as the flow rate increases.
^
,.
MATERIALS'

~Ll._
Stormceptor°
<n m ~ o v m Q N a in ~~
~°. i'i ti m ~~ w ~ ~ o ~ i~ o
Flow (cfs)
Figure 1. Runoff Volume by Flow Rate for CAPE HATTERAS BILLY MIT - NC 1458, 1957 to 2005
for 0.25 ac, 47% impervious. Small frequent storm events represent the majority of annual rainfall
volume. Large infrequent events have little impact on the average annual TSS removal, as they represent
a small percentage of the total annual volume of runoff.
60
0

(0
J5°
__... .... ... _ ......... ......._... ................ ............. ... ....... .......... .. ..._...._...... ._............ _........... .........._.... _. ........
c

7 40 ..._....____. .._. _....... .. ........__ ..___... ... _......
O
a
~3U_
N
F-

G .,
J~o
...._ _.__._. _......___. ..__.... _._..... __.__.._ __._. ___.. _.._.. _..
J ~ ~ N ~w co ~ io
rnN, ° N ~ a ~ -~ w
a w ~ m ~i u m i u -~
-- A ~ u •i ~ w a ° ~ a ~ o
Flow (cfs)
Figure 2. Long Term Pollutant Load by Flow Rate for CAPE HATTERAS BILLY MIT -1458, 1957 to
2005 for 0.25 ac, 47% impervious. The majority of the annual pollutant load is transported by small
3 ~
MATER1AtS'~ ~'~'"`

~~R~-._
Stormceptor®
frequent storm events. Conversely, large infrequent events carry an insignificant percentage of the total
annual pollutant load.
0
0
U
0
a~
H
a~
.a
m
7
U
Flaw (cfs)
Stormceptor Model STC 450i Drainage Area (ac) 0.25
TSS Removal (%) 89 Impervious (%) 47
Figure 3. Cumulative TSS Removal by Flow Rate for CAPE HATTERAS BILLY MIT -1458, 1957 to
2005. Stormceptor continuously removes TSS throughout the full range of storm events analyzed. Note
that large events do not significantly impact the average annual TSS removal, Therefore no decline in
cumulative TSS removal indicates scour does not occur as the flow rate increases.
4 ^
MATERIALS""

~l.__
Stormceptor
Appendix 1
Stormceptor Design Summary
Project Information
Date 1 /8/2008
Project Name Wilson Project
Project Number N/A
Location Ocracoke, NC
Designer Information
Company Pate Engineering & Land
Surveying
Contact Derek Blair
Notes
N/A
Drainage Area
Total Area (ac) 0.25
Imperviousness (%) 47
The Stormceptor System model STC 450i achieves the
water quality objective removing 89% TSS for a Fine
(organics, silts and sand) particle size distribution.
Stormceptor Sizing Summary
Stormceptor Model TSS Removal

STC 900 93
STC 1200 94
STC 1800 94
STC 2400 96
STC 3600 96
STC 4800 97
STC 6000 97
STC 7200 98
STC 11000 98
STC 13000 98
STC 16000 99
Rainfall
Name CAPE HATTERAS BILLY MIT
State NC
ID 1458
Years of Records 1957 to 2005
Latitude 35°13'57"N
Longitude 75°37'19"W
Water Quality Objective
TSS Removal (%) 85
Upstream Storage
Storage Discharge
(ac-ft) (cfs)
0 0
MATERIALS""

~~l_.
Stormceptor0
Particle Size Distribution
Removing silt particles from runoff ensures that the majority of the pollutants, such as hydrocarbons and heavy
metals that adhere to fine particles, are not discharged into our natural water courses. The table below lists the
particle size distribution used to define the annual TSS removal.
Fine or anics, silts and sand
Particle Size Distribution Specific Settling Particle Size Distribution Specific Settling
Gravity Velocity Gravity Velocity
m % ft/s m % ft/s
20 20 1.3 0.0013
60 20 1.8 0.0051
150 20 2.2 0.0354
400 20 2.65 0.2123
2000 20 2.65 0.9417
Stormceptor Design Notes
• Stormceptor performance estimates are based on simulations using PCSWMM for Stormceptor.
• Design estimates listed are only representative of specific project requirements based on total suspended
solids (TSS) removal.
• Only the STC 4501 is adaptable to function with a catch basin inlet and/or inline pipes.
• Only the Stormceptor models STC 450i to STC 7200 may accommodate multiple inlet pipes.
• Inlet and outlet invert elevation differences are as follows:
Inlet and Outlet P
Invert Elevations Differences
Inlet Pipe Configuration STC 450i STC 900 to STC
7200
Single inlet pipe 3 in. 1 in. 3 in.
Multiple inlet pipes 3 in. 3 in. Only one inlet
pipe.
• Design estimates are based on stable site conditions only, after construction is completed.
• Design estimates assume that the storm drain is not submerged during zero flows. For submerged
applications, please contact your local Stormceptor representative.
• Design estimates may be modified for specific spills controls. Please contact your local Stormceptor
representative for further assistance.
• For pricing inquiries or assistance, please contact Rinker Materials 1 [phone]
www. ri n ke rsto rm ce pto r. co m
6 ~
~'"`MATERIAtS~' ~'"`
STC 11000 to
STC 16000

~Ll_
Stormceptor°
Appendix 2
Summary of Design Assumptions

Site Drainage Area
Total Area (ac) 0.25 Imperviousness (%) 47
Surface Characteristics
Width (ft) 209
Slope (%) 2
Impervious Depression Storage (in.) 0.02
Pervious Depression Storage (in.) 0.2
Impervious Manning's n 0.015
Pervious Manning's n 0.25
Maintenance Frequency
Sediment build-up reduces the storage volume for
sedimentation. Frequency of maintenance is
assumed for TSS removal calculations.
Maintenance Frequency (months) 12
Infiltration Parameters
Horton's equation is used to estimate infiltration
Max. Infiltration Rate (in/hr) 2.44
Min. Infiltration Rate (in/hr) 0.4
Decay Rate (s-t) 0.00055
Regeneration Rate (s-t) 0.01
Evaporation
Daily Evaporation Rate (inches/day) 0.1
Dry Weather Flow
Dry Weather Flow (cfs) No
Upstream Attenuation
Stage-storage and stage-discharge relationship used to model attenuation upstream of the Stormceptor System
is identified in the table below.
Storage
ac-ft Discharge
cfs
0 0
7 ~
MATERIALS""

~Ll._
Stormceptor
Particle Size Distribution
Removing fine particles from runoff ensures the majority of pollutants, such as heavy metals, hydrocarbons, free oils
and nutrients are not discharged into natural water resources. The table below identifies the particle size distribution
selected to define TSS removal for the design of the Stormceptor System.
Fine or anics, silts and sand
Particle Size Distribution Specific Settling Particle Size Distribution Specific Settling
Gravity Velocity Gravity Velocity
m % ft/s m % ft/s
20 20 1.3 0.0013
60 20 1.8 0.0051
150 20 2.2 0.0354
400 20 2.65 0.2123
2000 20 2.65 0.9417
pC~L'UE;~1B~~ €or Stormceptor
Grain Size Ristributio~t~s

~~L
Stormceptor
...
TSS Loadin Parameters
TSS Loading Function Buildup /Washoff
Parameters
Target Event Mean Concentration 125
(EMC) (mg/L)
Exponential Buildup Power 0.4
Exponential Washoff Exponential 0.2

PCSWMM for Stormceptor calculates annual hydrology with the US EPA SWMM and local continuous historical
rainfall data. Performance calculations of the Stormceptor System are based on the average annual removal of
TSS for the selected site parameters. The Stormceptor System is engineered to capture fine particles (silts and
sands) by focusing on average annual runoff volume ensuring positive removal efficiency is maintained during all
rainfall events, while preventing the opportunity for negative removal efficiency (scour).
Smaller recurring storms account for the majority of rainfall events and average annual runoff volume, as observed
in the historical rainfall data analyses presented in this section.
Rainfall Station
Rainfall Station CAPE HATTERAS BILLY MIT
Rainfall File Name NC1458.NDC Total Number of Events 7799
Latitude 35°13'57"N Total Rainfall (in.) 2717.4
Longitude 75°37'19"W Average Annual Rainfall (in.) 55.5
Elevation (ft) Total Evaporation (in.) 79.0
Rainfall Period of Record (y) 49 Total Infiltration (in.) 1323.5
Total Rainfall Period (y) 49 Percentage of Rainfall that is 49 9
Runoff(%)
9 ~
MATERIALS""

~.
Sormceptor®
Rainfall Event Analysis
Rainfall Depth

in. No. of Events Percentage of
Total Events
% Total Volume

in. Percentage of
Annual Volume
0.25 5219 66.9 374 13.8
0.50 994 12.7 364 13.4
0.75 551 7.1 343 12.6
1.00 329 4.2 285 10.5
1.25 200 2.6 225 8.3
1.50 128 1.6 175 6.4
1.75 83 1.1 133 4.9
2.00 83 1.1 156 5.7
2.25 50 0.6 106 3.9
2.50 37 0.5 88 3.2
2.75 25 0.3 66 2.4
3.00 19 0.2 55 2.0
3.25 13 0.2 41 1.5
3.50 14 0.2 47 1.7
3.75 11 D.1 40 1.5
4.00 5 0.1 19 0.7
4.25 6 0.1 25 0.9
4.50 2 0.0 9 0.3
4.75 7 0.1 32 1.2
5.00 4 0.1 19 0.7
5.25 6 0.1 31 1.1
5.50 2 0.0 11 0.4
5.75 2 0.0 11 0.4
6.00 1 0.0 6 0.2
6.25 1 0.0 6 0.2
6.50 2 0.0 13 0.5
6.75 0 0.0 0 0.0
7.00 0 0.0 0 0.0
7.25 0 0.0 0 0.0
7.50 1 0.0 7 0.3
7.75 2 0.0 15 0.6
8.00 0 0.0 0 0.0
8.25 1 0.0 8 0.3
>8.25 1 0.0 8 0.3
Frequency of Occurence by Rainfall Depths
au
60
0
`N~ 70
U
C
°1 60
U
U
O 50
O
U 40
C
N
7
~' 30 -
N
LL
?0
~ tT N ~ (~li tT N N rtn ~ cn~ it N N CNn N N G °i u~ cNn
Rainfall Depth (in.)
10 ~
MATERIALS""

~Ll_
Stormceptor
Pollutograph
Flow Rate
cfs Cumulative Mass
0.035 74.7
0.141 96.1
0.318 99.4
0.565 99.9
0.883 100.0
1.271 100.0
1.73 100.0
2.26 100.0
2.86 100.0
3.531 100.0
4.273 100.0
5.085 100.0
s.sse 1oo.a
6.922 100.0
7.946 100.0
9.041 100.0
10.206 100.0
11.442 100.0
12.749 100.0
14.126 100.0
15.574 100.0
17,092 100.0
18.681 100.0
20.341 100.0
22.072 100.0
23.873 100.0
25.744 100.0
27.687 100.0
29.7 100.0
31.783 100.0
Cumulative Mass Transported by Flow Rate
For area:.25 (ac), imperviousness: 47%, rainfall station: CAPE HATTERAS BILLY MIT
0
a
a~
r
0
a
m
L
l0
~--~
N
N
(0
(9
7
C
C
Q
Flow (cfs)
11 ~
~ MATERIALS""

STANDARD SPECIFICATION FOR
STORMWATER OIL AND SEDIMENT SEPARATOR
PART 1 -GENERAL
1.1 DESCRIPTION
The work covered by this section consists of the construction of a structural underground
stormwater oil and sediment separator The Contractor shall furnish all equipment, tools,
labor and materials necessary to complete the work in accordance with the plans and
specifications.
1.2 REFERENCE STANDARDS
ASTM D-4097: Contact Molded Glass Fiber Reinforced Chemical Resistant Tanks
ASTM C 478: Standard Specification for Precast Reinforced Concrete Manhole Sections
ASTM C 443: Standard Specification for Joints for Concrete Pipe and Manholes, Using
Rubber Gaskets
1.3 SHOP DRAWINGS
1.3.1 Shop drawings consisting of catalog cuts or fabricator drawings showing the structure
and frames, grates, or covers shall be submitted by the Contractor to the Engineer for
approval.
1.3.2 Where an external bypass is required, the manufacturer must provide calculations
and designs for all structures, piping and any other required material applicable to the
proper functioning of the system, stamped by a Professional Engineer.
1.4 HANDLING AND STORAGE
Care shall be taken in loading, transporting, and unloading to prevent damage to materials
during storage and handling
PART 2 -PRODUCTS
2.1 GENERAL
The separator shall be circular and constructed from pre-cast concrete circular riser and slab
components. The internal fiberglass insert shall be bolted and sealed watertight inside the
reinforced concrete component. The separator shall be capable to be used as a bend or
junction structure within the stormwater drainage system,
2.2 PRECAST CONCRETE SECTIONS
All precast concrete components shall be designed and manufactured to a minimum live load
of AASHTO HS-20 truck loading or greater based on local regulatory specifications.
2.3 JOINTS
The concrete joints shall be water-tight and meet the design criteria according to ASTM C-
443. Mastic sealants or butyl tape are not an acceptable alternative.
Standard Specification - Stormwater Quality Treatment Device Page 1 of 4

2.4 FRAME AND COVER
The frame and cover shall include an indented top design with lettering of the unit's name
cast into the cover to allow for easy identification in the field.
2.5 CONCRETE
All reinforced concrete components shall be manufactured according to local specifications
and shall meet the requirements of ASTM C 478.
2.6 FIBERGLASS
The fiberglass portion of the water treatment device shall be constructed in accordance with
the following standard: ASTM D-4097: Contact Molded Glass Fiber Reinforced Chemical
Resistant Tanks.
2.7 INSPECTION
All precast concrete sections shall be inspected to ensure that dimensions, appearance and
quality of the product meet local specifications and ASTM C 478
PART 3 -PERFORMANCE
3.1 GENERAL
The stormwater quality treatment device shall remove oil and sediment from stormwater.
3.3 TOTAL SUSPENDED SOLIDS
The treatment device shall be capable of removing 80 percent of the average annual total
suspended solids (TSS) load without scouring previously captured pollutants.
Design methodologies shall provide calculations substantiating removal efficiencies and
correlation to field monitoring results using both particle size and TSS removal efficiency.
All manufactures shall provide performance data that the stormwater quality treatment
system does not scour previously captured pollutants based on the particle size distribution
specified in section 3.5. Performance data should be laboratory testing with an initial
sediment load of 50 percent of the unit's sediment capacity at an operating rate of 125% or
greater. Particle size distribution (PSD) for the initial sediment load shall conform to table
3.5.
3.4 FREE OIL
3.4.1 The separator must be capable of removing 95 percent of the floatable free oil.
3.4.2 The first 16 inches (405 mm) of hydrocarbon storage shall be lined with fiberglass to
provide a double wall containment of the hydrocarbon materials.
3.5 PARTICLE SIZE
3.5.1 The separator must be capable of trapping fine sand, silt, clay and organic particles in
addition to larger sand, gravel particles and small floatables.
Standard Specification - Storrnwater Quality Treatment Device Page 2 of 4

3.5.2 The stormwater quality treatment device shall be sized to a specific particle size
distribution that is clearly identified in both diameter and specific gravity. The example
below is a Fine Particle Size that is a common PSD used in design of water quality
devices to ensure proper design for capturing smaller particles and the high load of
associated pollutants.
Table 3.5 -Particle Size Distribution
Amount Diameter Specific Gravity
20% 20 micron 1.3
20% 60 micron 1.8
20% ~ 150 micron 2.2
20% 400 micron 2.65
20% 2000 micron 2.65
PART 4 -EXECUTION
4.1 INSTALLATION
The installation of the pre-cast concrete stormwater quality treatment device should conform
to state highway, municipal or local specifications for the construction of mahholes. Selected
sections of a general specification that are applicable are summarized below.
4.2 EXCAVATION
4.2.1 Excavation for the installation of the stormwater quality treatment device should
conform to state highway, municipal or local specifications.
4.2.2 The stormwater quality treatment device should not be installed on frozen ground.
Excavation should allow for adequate compaction around the structure. If the bottom of
the excavation provides an unsuitable foundation additional excavation may be
required.
4.2.3 In areas with a high water table, continuous dewatering should be provided to ensure
that the excavation is stable and free of water.
4.3 BACKFILLING
Backfill material should conform to state highway, municipal or local specifications. Backfill
material should be placed in uniform layers not exceeding 12 inches (300 mm) in depth and
compacted to state highway, municipal or local specifications.
4.4 WATER QUALITY DEVICE CONSTRUCTION SEQUENCE
4.4.1 The concrete water quality device is installed in sections in the following sequence:
• aggregate base
• base slab
• treatment chamber section(s)
• transition slab (if required)
• bypass section
• connect inlet and outlet pipes
• riser section and/or transition slab (if required)
• maintenance riser section(s) (if required)
• frame and access cover
Standard Specification -stormwater Quality Treatment Device Page 3 of 4

4.4.2 The precast base should be placed level at the specified grade. The entire base should
be in contact with the underlying compacted granular material. Subsequent sections,
complete with gasketed joint seals, should be installed in accordance with the precast
concrete manufacturer's recommendations.
4.4.3 Adjustment of the stormwater quality treatment device can be performed by lifting the
upper sections free of the excavated area, re-leveling the base, and re-installing the
sections. Damaged sections and gaskets should be repaired or replaced as necessary.
Once the stormwater quality treatment device has been constructed, any lift holes must
be plugged with mortar.
4.5 DROP PIPE AND RISER PIPE
Once the upper chamber has been attached to the lower chamber, the inlet drop tee, and
riser pipe must be attached. Pipe installation instructions and required materials shall be
provided with the insert.
4.6 INLET AND OUTLET PIPES
Inlet and outlet pipes should be securely set into the upper chamber using non-shrink grout or
approved pipe seals (flexible boot connections, where applicable) so that the structure is
watertight.
4.7 FRAME AND COVER OR FRAME AND GRATE INSTALLATION
The grade adjustment units should be laid in a full bed of mortar with successive units being
joined using sealant recommended by the manufacturer. Frames for the cover should be set
in a full bed of mortar at the elevation specified.
Standard Specification -stormwater Quality Treatment Device Page 4 of 4

~L
Stormceptor
Owner's Manual
April 2000
The Stormceptor® System is protected by
one or more of the following patents:
Canadian Patent No. 2,009,208
Canadian Patent No. 2,137,942
Canadian Patent No. 2,175,277
Canadian Patent No. 2,180,305
Canadian Patent No. 2,206,338
U.S. Patent No. 4,985,148
U.S. Patent No. 5,498,331
U.S. Patent No. 5,725,760
U.S. Patent No. 5,753,115
U.S. Patent No. 5,849,181
U.S. Patent No. 6,068,765
Australia 693.164
Australia 707,133
New Zealand 314,646
European Paten Treaty 95 307 996.9
The Stormceptor System for

Stormwater Quality Improvement
Congratulations!
Your selection of a Stormceptor System means that you have chosen the most recognized and efficient
Stormwater oiUsediment separator available. Stormceptor is a pollution control device that protects our
lakes, rivers and streams from the harmful effects of non-point source pollution. Please address any
questions or concerns regarding the Stormceptor Systems to Stormceptor Canada Inc at 1-800-565-4801
or visit our website at www.stormceptor.com.
What is a Stormceptor?
Stormceptor is a patented water quality structure that takes the place of a conventional manhole with in a
storm drain system. Stormceptor removes free oil (TPH) and suspended solids (TSS) from stormwater
preventing spills and non-point source pollution from entering downstream lakes and rivers. Key benefits
of a Stormceptor include:
• Capable of removing 50% to 80% of the total sediment load when properly applied as a source control
for small areas
• Removes free oil from stortnwater during low flow conditions
• Will not scour or re-suspend trapped pollutants
• Excellent spill control device for commercial and industrial developments
• Easy to maintain (vacuum truck)
• STORMCEPTOR clearly marked on the cover (excluding inlet designs)
• Engineered and continually tested
• Vertical orientation therefore resulting in a smaller footprint
Please Maintain Your Stormceptor
To ensure long-term environmental protection through continual performance, Stormceptor must be
maintained The need for maintenance is determined through inspection of the Stormceptor. Procedures
for inspection are provided in this document. Maintenance of the Stormceptor is performed from the
surface via vacuum truck. . If you require a list of contacts for cleaning your Stormceptor please call one
of our Stormceptor offices or your nearest Stormceptor affiliate (affiliates listed in Appendix 1).
Stormceptor

How does Stormceptor® Work?
Stormceptor can be divided into two components:
• Lower treatment chamber
• Upper by-pass chamber
Stormwater flows into the by-pass chamber via the storm drain pipe. Low flows are diverted into the
treatment chamber by a weir and drop pipe arrangement. The treatment chamber is always full of water.
Water flows up through the outlet pipe based on the head at the inlet weir, and is discharged back into the
by-pass chamber downstream of the weir. The downstream section of the by-pass chamber is connected
to the outlet storm drainpipe.
Free oils and other liquids lighter than water will rise in the treatment chamber and become entrapped
beneath the fiberglass insert since the outlet pipe is submerged. Sediment will settle to the bottom of the
chamber by gravity. The circular design of the treatment chamber is critical to prevent turbulent eddy
currents and to promote settling.
Dtuing high flow conditions, stormwater in the by-pass chamber will flow overtop of the weir and be
conveyed to the outlet storm drain directly. Water that overflows the weir creates a backwater effect on
the outlet pipe (head stabilization between the inlet drop pipe and outlet riser pipe) ensuring that excessive
flow will not be forced into the treatment chamber, which could scour or re-suspend the settled material.
The by-pass is an integral part of Stormceptor since other oiUgrit separators have been noted to scour
during high flow conditions (Schueler and Shepp, 1993).
Stormceptor Models and Ideirti~cation
Stormceptor is available in both concrete and fiberglass. There are currently nine different sizes available.
A concrete Stormceptor is denoted by STC (e.g. STC6000) preceding the model number. A fiberglass
Stormceptor is denoted by STA (e.g. STA6000) preceding the model number.
In the concrete Stormceptor, a fiberglass insert separates the treatment chamber from the by-pass
chamber. There is three insert designs: the "spool", the "disc" and the "inlet". The different insert designs
are illustrated in Figures 1, 2 and 3. These designs are easily distinguishable from the surface once the
cover has been removed. In the "spool" design you will see one large 914 mm (36") opening in the center
of the insert with two 200 mm (8") inspection ports located either vertically on the sides of the 914 mm
(36") opening or horizontally on either side of the opening. There are three versions of the in-line disc
insert: "single inlet/outlet", "multiple inlet" and "submerged". In the "disc" design you will be able to see
the inlet pipe, the drop pipe opening to the lower chamber, the weir, a 150 mm (6") oil inspection/cleanout
pipe, a large 610 mm (24") riser pipe-opening offset on the outlet side of the structure, and the outlet pipe
from the unit. The weir will be around the 610 mm (24") outlet pipe on the "multiple inlet" disc insert. The
"submerged" disc insert has a higher weir and a second inlet drop pipe. In the "inlet" design you will be
Stormceptor

able to see the 305 mm (12") inlet drop pipe and 100 mm (4") outlet riser pipe as well as a central 100mm
[4"] oil inspection/cleanout port.
Maintenance from the
surface by vacuum
truck. Vacuum hose
lowered through centr
opening in insert
Spool Insert
Concrete
Stormceptor
Figure 1 "Spool" Insert Concrete Stormceptor°
Stormceptor

Sediment & oil Oil removal can be
removal can be performed by vacuum truck
performed by vacuum ~ - ~ ".
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r
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Stormceptor

Inlet Insert
Figure 3 STC 300/450 Inlet Insert
Sizes/Models
Dimensions of the fiberglass and concrete Stormceptor® units are provided in Table 1. Values of invert to
grade are provided later in this document for your site. The total depth for cleaning will be the sum of the
depth from invert to grade and invert to the bottom of the unit.
Table 1. Stormce for Dimensions
Model
(Metric) Model
(US) Pipe Invert to Bottom of
STA Stormceptor
m (in.) Pipe Invert to Bottom of
STC Stormceptor
m (in.)
300 450 1.6 (64) 1.7 (68)
750 900 1.6 (64) 1.9 (74)
1000 1200 2.1 (81) 2.2 (86)
1500 1800 2.9 (115) 3.1 (122)
2000 2400 2.3 (89) 3.1 (122)
3000 3600 3.2 (127) 4.0 (158)
4000 4800 2.9 (113) 3.7 (146)
5000 6000 3.5 (138) 4.3 (170)
6000 7200 3.3 (128) 4.0 (158)
* Depths are approximate
The capacities of the different Stormceptor units are provided in Table 2.
StormceptoY
~ Inlet Grate

Table 2. Stormce tor° Ca acities
Model
(Metric) Model
(US) Sediment
Capacity
L (US gal) Oil
Capacity
L (US gal) Total Holding
Capacity
L (US gal)
300 450 1275 (335) 325 (85) 1775 (470)
750 900 2460 (565) 915 (280) 4325 (950)
1000 1200 3260 (845) 915 (280) 5125 (1230)
1500 1800 5660 (1445) 915 (280) 7525 (1830)
2000 2400 6150 (1345) 2945 (880) 10925 (2495)
3000 3600 10415 (2600) 2945 (880) 15195 (3750)
4000 4800 14060 (3475) 3490 (1025) 20180 (5020)
5000 6000 18510. (4550) 3490 (1025) 24635 (6095)
6000 7200 23445 (5425) 4150 (1100) 31210 (7415)
Identification
Even if you do not have plans of your storm drain system you will be able to easily identify where the
inline Stormceptor unit(s) (spool or disc insert) are since the name STORMCEPTOR is clearly embossed
on the cover. You will be able to determine the location of "inlet" Stormceptor units with horizontal catch
basin inlets by looking down the grate since the insert will be visible. The name Stormceptor is not
embossed on the inlet models due to the variability of inlet grates used/approved across North America.
Once you have found the unit, you may still be uncertain which model number it is. Comparing the
measured depth from the water level (bottom of insert) to the bottom of the tank with Table 1 should help
determine the size of the unit.
Starting in 1996, a metal serial number tag has been affixed to the inside of the unit. The serial number has
the model number written on it. If the unit does not have a serial number, or if there is any uncertainty
regarding the size of the interceptor using depth measurements, please contact Stormceptor at 1 800 565-
4801 and we will help you determine the size of a particular unit.
What is the Maintenance Procedure?
Maintenance of Stormceptor is performed using vacuum trucks. No entry into the unit is required for
maintenance of the spool insert, inlet insert or the smaller disc inserts. Entry to the level of the disc insert
may be required for servicing the larger disc insert models. DO NOT ENTER THE
STORMCEPTOR CHAMBER unless you have the proper equipment, have been trained and are
qualified to enter a confined space, as identified by local Occupational Safety and Health Regulations (e.g.
Canada Occupational Safety and Health Regulations - SOR/86-304). Without the proper equipment and
training, entry into confimed spaces can result in serious bodily harm and potentially death. Consult local,
provincial, and/or state regulations to determine the requirements for confined space entry. Be aware that
the insert may be slippery. In addition, be aware that some units do not have a safety grate to cover the
outlet riser pipe that leads to the submerged, lower treatment chamber.
Stormceptor

The Vacuum Service Industry is awell-established sector of the service industry that cleans underground
tanks, sewers and catch basins. Costs to clean a Stormceptor® will vary based on the size of unit and
transportation distances.
The depth of oil in the interceptor can be detemuned by inserting a dipstick tube in the 150 mm (6") oil
inspection/cleanout pipe ("disc" design), or in the 914 mm (36") central access way ("spool" design), or in
the 100 mm (4") cleanout pipe
("inlet" design).
Similarly, the depth of sediment can be measured from the surface without entry into the Stormceptor via
a dipstick tube equipped with a ball valve (Sludge Judge). This tube would be inserted in the central
opening ("spool" design) or in the 610 mm (24") opening ("disc" design), or in the 100 mm (4") cleanout
pipe ("inlet" design). Maintenance should be performed once the sediment depth exceeds the guideline
values provided in Table 3.
For the "spool" design Stormceptor maintenance is performed through the large central 914 mm (36")
diameter opening for both the oil and the sediment. In the "disc" design, oil is removed through the 150
mm (6") oil inspection/cleanout pipe and sediment is removed through the 610 mm (24") diameter outlet
riser pipe. Alternatively, oil could be removed from the 610 mm (24") opening if water is removed from
the lower chamber to lower the oil level to the level of the drop pipes. For the "inlet" design, maintenance
is performed through the 305mm (12") inlet drop pipe for the sediment, and oil can be removed from the
100 mm (4") oiUinspection cleanout pipe.
We recommend the following procedure to clean out the Stormceptor:
1. Check for oil (using a dipstick tube)
2. Remove any oil separately using a small portable pump
3. Decant the water from the unit to the sanitary sewer using a portable pump (prior approval is
required from the sewer authority/municipality)
4. Remove the sludge from the bottom of the unit using a vacuum truck
5. Re-fill the Stormceptor with water where required by the local jurisdiction
How Often Is Maintenance Required?
Generally, annual maintenance is recommended but the required maintenance frequency will vary with the
amount of pollution on your site (number of hydrocarbon spills, amount of sediment, etc.). It is
recommended that the frequency of maintenance be increased or reduced based on local conditions. If the
sediment load is high, maintenance may be required semi annually. Conversely once the site has stabilized,
maintenance may be required less frequently. Maintenance should be performed immediately after an oil
spill or once the sediment depth in Stormceptor reaches the value specified in Table 3 based on the unit
size.
In the "disc" design and "inlet" design, any potential obstructions at the inlet can be observed from the
surface. The "disc" insert has been designed as a platform to facilitate maintenance of the Stormceptor
and the storm drain system.
Stormceptor

Table 3. Sediment De the Indicatin Re uired Maintenance
Model
(Metric) Model
(US) Sediment Depth
mm (in.)
300 450 200 (8)
750 900 200 (8)
1000 1200 250 (10)
1500 1800 375 (15)
2000 2400 300 (12)
3000 3600 425 (17)
4000 4800 375 (15)
5000 6000 450 (18)
6000 7200 375 (15)
What Should I do in the Event of an Oil Spill?
Stormceptor is often implemented in areas where the potential for spills is great. Stormceptor should be
cleaned immediately after a spill occurs by a licensed liquid waste hauler. You should also notify the
appropriate regulatory agencies as required in the event of a spill.
Disposal of the Trapped Material Removed from Stormceptor
The requirements for the disposal of material from Stormceptor are similar to that of any other Best
Management Practices (BMP). Local guidelines should be consulted prior to disposal of the separator
contents.
In most areas the sediment, once dewatered, can be disposed of in a sanitary landfill. It is not anticipated
that the sediment would be classified as hazardous waste. In some areas, mixing the water with the
sediment will create a slurry that can be discharged into a trunk sanitary sewer. In all disposal options,
approval from the dsposal facility operator/agency is required. Petroleum waste products collected in
Stormceptor (oiUchemicaUfuel spills) should be removed by a licensed waste management company.
What if I see an oil rainbow or sheen at the Stormceptor outlet?
With a steady influx of water with high concentrations of oil, a sheen may be noticeable at the
Stormceptor outlet. This may occur because a rainbow or sheen can be seen at very small oil
concentrations (< 10 ppm). Stormceptor will remove over 95% of all free oil and the appearance of a
sheen at the outlet with high influent oil concentrations does not mean that the unit is not working to this
level of removal. In addition, if the influent oil is emulsified, the Stormceptor will not be able to remove it.
The Stormceptor is designed for free oil removal and not emulsified or dissolved oil conditions.
StormceptoY

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---T4'-~!~Y-86M-F2'E'~4--11'-10'~2~8'~M--~---t8'Ol/t' Z~B'fi+Y T~B'-~---T~512'-
- 59'0 -_ _.._.
FIRST FLOOR PLAN HEATED AREA: 1090
DECKS & PORCHES: 545
SCALE: 1 /411 = 1 I STAIR TOWER, LIFT & MECHANICAL: 220
FOR:
JACKS RUTHANNE
WILSON
PROJECT.
THE WATERMAN'S
COTTAGE
OCf~A';~'' II^,
Dl GI t 1..i~. ,'. ~ ~. ~
LIVING AREA
SECOND FLOOR PLAN HEATED AREA: 7203
THIRD LEVEL DECK = 124 SQ FT. DECKS & PORCHES: 388
SCALE: 1/411 = 11 STAIR TOWER & STORAGE: 120
LINDA IHLE REALTY, DESIGN & DRAFTING LLC 1407 KETCH LANE KILL DEVIL HILLS NC 27948 252-449-8422