20060080 Ver 1_More Info Received_20060127

Malpass & Associates
Engineering and Planning
1645 EaQ Arlington Boulevard `.?tito P
Cat: ? nvillt. N(. 27858
"l: oe-!252) 756-1! 3k.
F ., (252) 756-209,5
email jamie(n)ma[pas sandassociat-:
To: NCDENR
Letter of Transmittal
Date: 1262006
Attention: SAM AGHIMIEN
Re: FERGUSON
Job No. P-806
NCDWQ-401 DIVISION
2321 CRABTREE BLVD
RALEIGH, NC 27604
WE ARE SENDING YOU: ? Attached ? Under separate cover via
? Shop Drawings ? Prints ? Plans ? Samples
? Copy of Letter ? Change Order ?
Qr=c?r=o?
JAN 2 7 &'.;
the following items DENR - WATER QUAi..
WETLANDS AND STORMWATER,;-
? Specifications
Date No.
1 125/2006 Ferguson: Wet Detention Worksheet
1 1252006 Ferguson Construction Plan Sheet 4 of 6
THESE ARE TRANSMITTED As Checked Below:
? For Approval ? Approved As Submitted ? Resubmit copies for approval
? For Your Use ? Approved As Noted ? Submit copies for distribution
? As requested ? Returned for corrections ? Return corrected prints
? For review and comment ?
? FOR BIDS DUE ? PRINTS RETURNED AFTER LOAN TO US
REMARKS
The construction plan has been revised to increase the forebay volume.
The Operation and Maintenance agreement will be coming directly to you from the owner.
COPY TO: File -9 on
SIGNED:
If enclosures are not as noted, kindly notify us at once.
a gg ?v U
JAN `Z 1 N06
Project No. DWQ ZtwAS R i U-AUTV/ ke provided by DWO
WE fLWS AND STAB
DIVISION OF WATER QUALITY - 401 WET DETENTION BASIN WORKSHEET
DWO Stormwater Management Plan Review:
A complete stormwater management plan submittal includes a wet detention basin worksheet for each basin,
design calculations, plans and specifications showing all basin and outlet structure details, and a fully executed
operation and maintenance agreement. An incomplete submittal package will result in a request for additional
information and will substantially delay final review and approval of the project.
1. PROJECT INFORMATION (please complete the following information):
Project Name : Ferguson Enterprises Inc.
Contact Person: Jamie Midgette Phone Number: ( 252 ) 756-1780
For projects with multiple basins, specify which basin this worksheet applies to:
Basin Bottom Elevation 69.0 ft. (average elevation of the floor of the basin)
Permanent Pool Elevation 74.0 ft. (elevation of the orifice invert out)
Temporary Pool Elevation 74.9 ft. (elevation of the outlet structure invert in)

Permanent Pool Surface Area 11,150 sq. ft. (water surface area at permanent pool elevation)
Drainage Area 6.25 ac. (on-site and off-site drainage to the basin)
Impervious Area 4.75 ac. (on-site and off-site drainage to the basin)

Permanent Pool Volume 16,629 cu. ft (combined volume of main basin and forebay)
Temporary Pool Volume 10,450 cu. ft. (volume detained on top of the permanent pool)
Forebay Volume 3,312 cu. ft.

SA/DA used 4.0 (surface area to drainage area ratio)
Diameter of Orifice 2.5 in. (draw down orifice diameter)
II. REQUIRED ITEMS CHECKLIST
The following checklist outlines design requirements per the Stormwater Best Management Practices manual
(N.C. Department of Environment, Health and Natural Resources, November 1995) and Administrative Code
Section: 15 A NCAC 2H .1008. Initial in the space provided to indicate the following design requirements have
been met and supporting documentation is attached. If a requirement has not been met, attach an explanation of
why.
Applicants Initials
'VI The temporary pool controls runoff from the I inch storm event.
1?t The basin length to width ratio is greater than 3:1.
,1?L1 The basin side slopes are no steeper than 3:1.
?cM A submerged and vegetated perimeter shelf at less than 6:1 is provided.
rat Vegetation to the permanent pool elevation is specified.
An emergency drain is provided to drain the basin.
Try The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet).
The temporary pool draws down in 2 to 5 days.
The forebay volume is approximately equal to 20% of the total basin volume.
i'f Sediment storage is provided in the permanent pool.
Access is provided for maintenance.
A minimum 30-foot vegetative filter is provided at the outlet.
/J,2t A site specific operation and maintenance (O&M) plan is provided.
!?1 A vegetation management/mowing schedule is provided in the O&M plan.
7yir Semi-annual inspections are specified in the O&M plan.
A debris check is specified in the O&M plan to be performed after every storm event.
A specific sediment clean-out benchmark is listed (elevation or depth) in O&M plan.
A responsible party is designated in the O&M plan.
FOR SWG100 09/97 Page 1 of 1
• Emergency drainage of the basin will be accomplished using pumps.
• The vegetative filter at the outlet is replaced with the wetland area and
bioretention area.
Malpass & Associates
Engineering and Planning
1645 FE-.t A.riin(iton €'otilevard =>taite it
metiville. NC 27858
`t-'11i?m , [phone]
Fa y {752} 717
CI-2098
email jainie((r ,maInassandassoc.iates
Letter of Transmittal
Date: 1252006
Attention: SAM AGHIMIEN
Re: HUDSON INDUSTRIAL BUILDING
Job No. P-809
O?NR? UJskR
To: NCDENR
NCDWQ-401 DIVISION
2321 CRABTREE BLVD
RALEIGH, NC 27604
WE ARE SENDING YOU:
? Shop Drawings
? Copy of Letter
© Attached
? Prints
? Change Order
? Under separate cover via
? Plans ?
the following items
Samples ? Specifications
Coies Date No. Description
1252006 Hudson Industrial Buildin : Wetland Worksheet
r 1/242006 Hudson Industrial Buildin : O eration and Maintenance a reement
1 1252006 Hudson Industrial Buildin : Construction Plan sheet 4 of 7

THESE ARE TRANSMITTED As Checked Below:
? For Approval ? Approved As Submitted
? For Your Use ? Approved As Noted
® As requested ? Returned for corrections
? For review and comment ?
? FOR BIDS DUE
? Resubmit copies for approval
? Submit copies for distribution
? Return corrected prints
? PRINTS RETURNED AFTER LOAN TO US
REMARKS
The construction plan has been revised to show the forebays at the flared end sections.
COPY TO: File
SIGNED:
If enclosures are not as noted, kindly notify us at once.
DWQ Project No. JAN 7 2006
DIVISION OF WATER QUALITY - 401 EXTENDED DETENTION (and POCKET*) WETLAND WOP%§kWMATER QUALITY
I. PROJECT INFORMATION (please complete the following information):
Project Name : Hudson Industrial Buildinq
Contact Person: Jamie Midgette Phone Number: ( 252 ) 756-1780
For projects with multiple basins, specify which basin this worksheet applies to:
Permanent Pool Elevation 19.0 ft. (elevation of the orifice invert out)
Temporary Pool Elevation 19.7 ft. (elevation of the outlet structure invert in)
Permanent Pool Surface Area 4,889 sq. ft. (water surface area at permanent pool elevation)
Drainage Area 1.9 ac. (on-site and off-site drainage to the basin)
Impervious Area 1.12 ac. (on-site and off-site drainage to the basin)
Forebay Surface Area 775 sq. ft. (at permanent pool elevation approximately 15%)*
Marsh 0"-9" Surface Area 1,765 sq. ft. (at permanent pool elevation approximately 35%)*
Marsh 9"-18" Surface Area 1,549 sq. ft. (at permanent pool elevation approximately 35%)*
Micro Pool Surface Area 800 sq. ft. (at permanent pool elevation approximately 15%)*
Temporary Pool Volume 2,759 cu. ft (volume detained on top of the permanent pool)
SAIDA used 2.37 (surface area to drainage area ratio)*
Diameter of Orifice 0.875 in (draw down orifice diameter)
II. REQUIRED ITEMS CHECKLIST
Initial in the space provided to indicate the following design requirements have been met and supporting documentation is attached. If a
requirement has not been met, attach an explanation of why. At a minimum, a complete stormwater management plan submittal includes
a worksheet for each BMP, design calculations, plans and specifications showing all BMPs and outlet structure details, a detailed
drainage plan and a fully executed operation and maintenance agreement. An incomplete submittal package will result in a request for
additional information and will substantially delay final review and approval of the project
A licants Initials
The temporary pool controls runoff from the 1 inch rain.
?t The basin side slopes are no steeper than 3:1.
A planting plan for the marsh areas with plant species and densities is provided.
,a Vegetation above the permanent pool elevation is specified.
An emergency drain is provided to drain the basin.
The temporary pool draws down in 2 to 5 days.
Sediment storage is provided in the permanent pool.
A sediment disposal area is provided.
Access is provided for maintenance.
A site specific, signed and notarized operation and maintenance agreement is provided.
The drainage area (including any offsite area) is delineated on a site plan.
4 Access is provided for maintenance.
Plan details for the wetland are provided.
Plan details for the inlet and outlet are provided.
A site specific operation and maintenance agreement, signed and notarized by the responsible party is provided (see
http://h2o.ehnr.state.nc.us/ncwetlands/oandm.doc).
* Pocket Wetlands have different design parameters and are only assumed to remove 35% TSS - See pp. 19 and 20 of the NC DENR
Stormwater BMP Manual, April 1999. 10% open water, 50% high marsh, 40% low marsh.
* Due to the relatively flat topography, the emergency draining of the wetland will have
to be accomplished via pumping.
WETLAND DETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT
The wetland detention basin system is defined as the wetland detention basin,
pretreatment including forebays and the vegetated filter if one is provided.
Maintenance activities shall be performed as follows:
After every significant runoff producing rainfall event and at least monthly:
a. Inspect the wetland detention basin system for sediment accumulation, erosion,
trash accumulation, vegetated cover, and general condition.
b. Check and clear the orifice of any obstructions such that drawdown of the
temporary pool occurs within 2 to 5 days as designed.
2. Repair eroded areas immediately, re-seed as necessary to maintain good
vegetative cover, mow vegetative cover to maintain a maximum height of six inches,
and remove trash as needed.
3. Inspect and repair the collection system (i.e. catch basins, piping, swales, riprap,
etc.) quarterly to maintain proper functioning.
4. Remove accumulated sediment from the wetland detention basin if the elevation of
the marsh areas exceeds the permanent pool elevation (19.0'). This shall be
performed by removing the upper 6 inches of soil and stockpiling it. Then the marsh
area shall be excavated six inches below design elevations. Afterwards the
stockpiled soil should be spread over the marsh surface. The soil should not be
stockpiled for more than two weeks. Removed sediment shall be disposed of in an
appropriate manner and shall be handled in a manner that will not adversely impact
water quality (i.e. stockpiling near a wetland detention basin or stream, etc.).
5. Wetland planting densities in the marsh areas should be maintained by
replanting/reseeding bare areas as needed. Wetland plants should be encouraged
to grow in the marsh areas.
6. If the basin must be drained for an emergency or to perform maintenance, the
flushing of sediment through the emergency drain shall be minimized to the
maximum extent practical.
7. All components of the wetland detention basin system shall be maintained in good
working order.
I acknowledge and agree by my signature below that I am responsible for the
performance of the seven 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.
Print name: James H. Hudson
Title: Owner
Address: P.O. Box 2060: Greenville, NC 27858
Phon
Signe
Date:
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.
a Notary Public for the State of
do hereby certify that
\c 4,19.1 // AJ?o? personally appeared before me thisZ?
day of and acknowledge the due execution of the
forgoing wet [wetland] detention basin maintenance requirements. Witness my hand
and official seal,
?jTARY• N% to
G d
SEAL
My commission expires vas Z5Y 20 46

0G 02 08p Ken Malpass 252-756-2098
Malpass & Associates
1645 East Arlington Blvd. Suite D
Cire?mville, NC 27858
Fax Cover Sheet
DATE: January 27, 2006 TIME: 2:08:34 PM
TO: Sam Aghimien PHONE: [phone]
NCDENR-DWO-401 FAX: [phone]
FROM: Jamie Midgette PHONE: [phone]
FAX: [phone]
RE: FERGUSON ENTERPRISES, INC
Number of pages including cover sheet: 2
Please call if you have any questions.
Thanks
JHIJ-E7-2lUF16 FRI 14:0 TEL:[phone]"g3 FJAME:D1,10-IJETLH-HDS
P.1
P. i
M 02:090 Ken Malpass 252-756-2098 p.2
11'rc*ct No. DWQ-_ (to be provided ?y DWQ_)
DIVISION OF WATER QUALITY - 401 WET DETENTION BASIN WORKSHEET
1) ', Stormyq ter Management Plan Review:
A complete stormwater management plan submittal includes a wet detention basin worksheet for each basin,
design calculations, plans and specifications showing all basin and outlet structure details, and a fully executed
operation and maintenance agieement. An incomplete submittal paukage will result in a request for additional
information and wil I substantially delay final review and approval of the prL ject.
1. PROJECT INFORMATION (please complete the following information):
Project Name : Ferguson Enterprises Inc_ _ _ _ - -
Contact Person: Jamie Mid&,ette Phone Number: U?521 756-_1.780 For projects with multiple basins, specify which basin this worksheet applies to:
Basin Bottom Elevation 69.0 ft. (average elevation of the floor of the basin)
Permanent Pool Elevation 74.0 ft. (elevation of the orifice invert out)
Temporary Pool Elevation 74.9 ft. (elevation ofthe outlet structure invert in)
Permanent Pool Surface Area 11,150_ - sq. fft. (water surface area at pennanent pool elevation)
Drainagc Area 6.25 ac. (on-site and off-site drainage to the basin)
Impervious Area 4.75 _ ac. (on-site and off site drainage to the basin)
Permanent Pool Volume 33,000 cu. ft (combined volume of main basin and R)rebay)
Temporary fool Volume 17,000 cu. ft. (volume detained on top of the permanent pool)
Forebav Volume 0,000 cu. ft.
SA/DA used 4.0 (surface area to drainage area ratio)
Diameter of Orifice _ 2.0 in. (draw down orifice diameter)
11. REQUIRED ITEMS CHECKLIST
The lbliowing checklist outlines design requirements per the Stormwater Best Management. Practices manual
(N.C. Department of Environment, Health and Natural Resources, November 1995) and Administrative Code
Section; 15 A NCAC 2H .1008. Initial in the space provided to indicate the following design requirements have
been met and supporting documentation is attached. If a requirement has not been met, attach afi explanation rif
?vhV.
A 1. licants Initials
1'he temporary pool controls runoff from the 1 inch storm event.
-% The basin length to width ratio is greater than 3:1 _
The basin side slopes are no steeper than 3:1.
A submerged and vegetated perimeter shelf at less than 6:1 is provided.
Vegetation to the permanent pool elevation is specified.
__An emergency drain is provided to drain the basin.
--_The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet).
i _-__The temporary pool draws down in 2 to 5 days.
-z , The forebay volume is approximately equal to 20% of the total basin volume,
T' Sediment storage is provided in the permanent pool.
Access is provided for maintenance.
_ ___A minimum 30-foot vegetative filter is provided at the outlet.
o., _ A site specific operation and maintenance (O&M) plan is provided.
/! e A vegetation managementlmowing schedule is provided in the O&M plan.
Semi-annual inspections are specified in the O&M plan.
-- A debris check is specified in the O&M plan to be performed after every storm event.
A specific sediment clean-out benchmark is listed (elevation or depth) in O&M Plan.
_A responsible party is designated in the O&M plan.
F0kM S W G I t,'0 09/97 Page 1 of 1
JOH-2i-2tiDD FPI 14:01 TEL:[phone]JAME:DWr-WETLANDS F. 2
Project Name: Ferguson enterprises
Project No. DWQ
Pond No.
SUBMITTED DESIGN: 1 REQUIRED DESIGN:
1/27/2006
elevations` 0 average depth status
Bottom of Basin (ft) 69
Permanent Pool (ft) 74 5 ft. depth ok
Temporary Pool (ft) 74.9 0.9 ft. depth ok
areas
Permanent Pool SA (sq ft) 11150 6142 sq. ft. ok
Drainage Area (ac) 6.25 r". 1g4_ 8! on avg depth ok
Impervious Area (ac) 4.75 76.0 % -
volumes
Permanent Pool (cu ft) 33000
Temporary Pool (cu ft) 17000 16653 cu. ft. ok
Forebay (cu ft) 6000 18.2 % ok
other parameters
SA/DA 4 2.26 -
Orifice Diameter (in) 2 0.07 cfs drawdown -
Design Rainfall (in) 1 2.8 day drawdown ok
Linear Interpolation of Correct SAIDA * * *
5 ft. Permanent Pool Depth
% Impervious SA/DA fron (Avg. Depth)
Next Lowest 70 2.07 2.109955157 1.08
Project Impervious 76.0 2.26 129 1.29
Next Highest 80 2.38 2.418340807 1.43
3ft 4
Project Name: Ferguson enterprises
Project No. DWQ
Pond No.
SUBMITTED DESIGN: 1 REQUIRED DESIGN:
1/27/2006
elevations '1 }5 average depth status
Bottom of Basin (ft) 69
Permanent Pool (ft) 74 5 ft. depth ok
Temporary Pool (ft) 74.9 0.9 ft. depth ok
areas
Permanent Pool SA (sq ft) 11150 6142 sq. ft. ok
Drainage Area (ac) 6.25 based on avg depth ok
Impervious Area (ac) 4.75 76.0 % -
volumes
Permanent Pool (cu ft) 16629
Temporary Pool (cu ft) 10450 16653 cu, ft. check tempo
Forebay (cu ft) 3312 19.9 % ok
other parameters
SA/DA 4 2.26 -
Orifice Diameter (in) 2.5 0.11 cfs drawdown -
Design Rainfall (in) 1 1.1 day drawdown check drawn
Linear Interpolation of Correct SAIDA * * *
5 ft. Permanent Pool Depth
% Impervious SA/DA fron (Avg. Depth)
Next Lowest 70 2.07 3.563523767 1.08
Project Impervious 76.0 2.26 r", 1.29
Next Highest 80 2.38 3.813179372 1.43
3'ft 4