SW4100302_HISTORICAL FILE_20100527

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW
DOC TYPE
El CURRENT PERMIT
❑ APPROVED PLANS
C� HISTORICAL FILE
DOC DATE
nLP/���u I
YYYYMMDD

AA
NC®ENR
North Carolina Department of Environment and Natura
Division of Water Quality
Beverly Eaves Perdue Coleen H. Sullins
Governor Director
May 24, 2010
Mr. H. Mack Summey, Jr, PE
Summey Engineering Associates, PLLC
PO Box 968
Asheboro, North Carolina 27204
RECEIVED
WC, Oect. of ENR
MAY 2 7 2010
Resources linston•Salem
Regional Office
Dee Freeman
Secretary
Subject: Request for Additional Information #2
Stormwater Project No. SW4100302
Piedmont Triad Ambulance & Rescue
Randolph County
Dear Mr. Summey:
The Division of Water Quality Central Office received your updated Stormwater Management Permit Application
for the subject project on May 20, 2010 and found that the application is not complete. The following
information is needed to continue the stormwater review:
1. Please revise the infiltration trench calculations and supplement forms to reflect the actual volume
provided and drawdown time. Trench #1 provides 800 CF of storage (125,x8,x2'x0.40 = 800 CF).
Assuming an infiltration rate of 2.5 inlhr and bottom surface area of 1000 SF, the total drawdown .
time for the required volume of 735 CF is 3.53 hrs. Please revise all trench supplements for these
two parameters as necessary.
2. Please revise the infiltration trench section drawing similar to the sketch attached for your
reference. Note that a pea gravel layer with underlying filter fabric will aid in maintenance of the
trench when sediment cleanout is required.
3. Observation wells were not found on the infiltration trench plan & details. Please provide as
previously requested.
4. The overall project has a required water quality volume of 2166 CF. As proposed, the trenches
provide 2012 CF of storage. Please increase dimensions as appropriate to meet the minimum
requirement.
5. Please specify the locations of all roof downspouts and provide a curb on the western side of the
proposed parking lot to ensure that all roof and parking runoff is treated by an infiltration trench.
Optionally, Trench #8 and Trench #1 can'be extended around the corners of the building and
parking lot, respectively, to meet this requirement.
6. Trench #1 dimensions on the plan sheet and table must be revised for consistency with the
calculations.
The requested information should be received by this Office prior to June 8, 2010, or the application will be
returned as incomplete. Please ensure that all requested information is accurate and complete, The return of a
project will necessitate resubmittal of all required items, including the application fee.
Wetlands and Stormwater Branch �T0i 1
1617 Maif Service Center, Raleigh, North Carolina 27699-1617 1 V OI-tl4 1 Cal-Q fi n a
Location: 512 N. Salisbury St. Raleigh, North Carolina 27604 f* Ir
Phone: [phone] FAX: [phone] Customer Service: 1-877-623-6748 iatu all y
internet: www.ncwalerQyality.ora

Mr. H. Mack Summey, Jr, PE
SW4100302 -- Piedmont Triad'Ambulance & Rescue
May 24, 2010
Please reference the State assigned project numbe0on all correspondence. New original documents must be
provided and copies are not acceptable. If you have any questions concerning this matter feel free to contact
me at [phone] or [e-mail].
Sincerely,
Cory se
Environmental Engineer
cc: ,Winston-Salem. Regional Office
DWQ Central Files
Stormwater Permitting Unit Files

AGA (Of
NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue Coleen H. Sullins Dee Freeman
Governor Director Secretary
RECEIVED i
April 8, 2010 N.C. DeVL of ENR
Mr. Gart Evans, Chairman APR i 1 2010
Piedmont Triad Ambulance & Rescue, Inc. Winston-Sa4em
PO Box 534 Regional office
High Point, North Carolina 27261
Subject: Request for Additional Information
5torriwater Project No. SW4100302
Piedmont Triad Ambulance & Rescue
Randolph County
Dear Mr. Evans:
The Division of Water Quality Central Office received a Stormwater Management Permit Application for the
subject project on March 29, 2010. A preliminary review of that information has determined that the application
is not complete. The following information is needed to continue the stormwater review:
1. Please provide a complete soil analysis including in -situ soil type, hydraulic permeability or
infiltration rate, and the methods used to evaluate soil properties. Please note that all supplement
forms list an infiltration rate of 0.02 inlhr which is not compatible with BMP Manual requirements of
at least 0.52 inlhr for infiltration devices.
2. Calculations using the Simple method described in chapter 3 of the BMP Manual must be provided to
calculate the water quality volume required for each drainage area. In addition, when sizing each
infiltration trench, the porosity of the stone material must be accounted for to determine actual
storage volume provided. For example, a 100'x4'x3' trench does not provide 1200 CF of available
water storage but rather some portion of that based on the drainage material's porosity. For #57
washed stone with assumed porosity of 0.40, the available storage volume is 480 CF at those
dimensions.
3. Please revise final grading to ensure that all flow from impervious surfaces reaches an infiltration
trench. Areas of concern with the proposed design include the western portion of the building and
parking area and the driveway entrance.
4. Flows greater than that of the 1" design storm must bypass infiltration devices and flow uniformly
over a 30 ft vegetated filter strip. This requirement may be waived by providing storage and
infiltrating 2.5 times the required water quality volume of the design storm. Please revise as
necessary.
5. Please provide one observation or monitoring well per infiltration trench per BMP Manual
requirements.
6. Please show the boundaries of all proposed drainage easements surrounding stormwater BMPs.
Please note that this request for additional information is in response to a preliminary review. The requested
information should be received by this Office prior to May 10. 2010, or the application will be returned as
Wetlands anv stormwater Branch One 1. rol
1617 Mail Service Censer, Raleigh, North Carolina 27699-1617 North Caina
Location: 512 N. Salisbury St, Raleigh, North Carolina 27804 1�1+�i
Phone: [phone] FAX: [phone] Customer Service: 1-877.623.6748 atu r` sly
Internet: www.nmaterquality.orq

Mr. Gart Evans
SW4100302 — Piedmont Triad Ambulance & Rescue
April 8, 2010
incomplete. The return of a project will necessitate resubmittal of all required items, including the application
fee.
If you need additional time to submit the information, please mail or fax your request for a time extension to the
Division at the address and fax number at the bottom of this letter. The request must indicate the date by which
you expect to submit the required information. The Division is allowed 90 days from the receipt of a completed
application to issue the permit.
Please reference the State assigned project number on all correspondence. New original documents rr us:'be
provided and copies are not acceptable. If you navq any questions concerning this matter feel free to contact
me at [phone] or cory.larsen@ncdenr,gov.
Sincerely,
Cory Lars n
Environmental Engineer
cc: Winston-Salem Regional Office
DWQ Central Files
Stormwater Permitting Unit Files

Project Narrative
;. ' Piedmont 'Triad Ambulance & Rescue, Inc,
E. Balfour- Drive
Randolph County - Asheboro, NC
The purpose of this narrative is to briefly describe le development of a new Ambulance & Rescue
Facility located on a 1.99 acre parcel at 108 E. Balfour Drive in Asheboro NC.
This stormwater management plan is the result of thI site being Tipped Into the NPDES Phase II
regulations and as a result must comply with the Post Construction Rules.
The existing 1.99 acre site was originally grassed & wooded. The existing topography slopes from the
Southwest to the northeast toward a channel along the eastern property line. East Balfour Avenue
borders the property along the North. No perennial streams exist on the property. There is a drainage
area of Approx. 15 acres that drains thru the channel along the east. Due to this large drainage area, no
BMP's were proposed in the channel since the BMP size would be larger than the site development
plan proposed.
The proposed development consists of clearing,
placing a building almost in the center of the pr
property.
bing & grading approximately 1.99 acres and
y. There is no existing Built Upon area on the
Due to the slope of the property, as recommended by NCDENR-DWQ, we propose eight (8) gravel
infiltration trenches to treat the stormwater runoff. The new trenches will be constructed and all new
Built Upon Area (BUA) will be directed to the trenches thru the natural grading of the site and by
small berms. Due to the low flow going to these B P's, grass will suffice as a permanent cover. A
detailed sequence of construction has been provide7to ensure the trenches are completed at the end of
the project and that the site is stabilized prior to allowing any stormwater to enter the completed
trenches.
No future development is proposed for the site.
The site has been approved by the City of Asheb
NCDENR-Division of Land Quality. Please see
information.
Planning and Engineering Departments and the
attached plans, calculations and details for more

Project Calculations
Prepared By.
SUMMEY ENGINEERING ASSOCIATES, PLLC
ENGINEERING • LAND PLANNING • CONSULTING
P.O. BOX 968
ASHEBORO, NC 27204
Phone: [phone] / Fax: [phone]
E-mail: [e-mail]
June, 2010
H
26447 0
> �GIN �

INFILTRATION TRENCH No.
1
Project: Piedmont Traid Ambulance & Rescue
Engineer: H. Mack Summey, Jr.
Impervious Area (la)=
0.2121
ac.
Da (contributing drainage area) =
0.2328
ac.
Volume of trench required (includes .4 Porosity) =
1837.6
cu. ft.
Length of trench provided =
125.0
ft.
Width of Trench Provided =
8
ft.
Depth of trench provided =
2
ft.
Soil type =
sandy clay loam
Infiltration rate =
0.011
Volume of trench provided =
2000
CF
Water Quality Volume Provided:
800.0
CF
Infiltration Rate (field test) =
2.5
In/hour
Rd = Design Rainfall =
1
Inch
la = BUA/Da
0.911
Rv = .05+0.9 x la
0.870
Volume of Runoff to Treat = 3630 x Rd x Rv x Da
735.027
CIF
Actual Drawdown Time in Trench =
3.528
Hours
Actual Drawdown Time in Trench =
0.147
Days
INFILTRATION TRENCH No. 2
Project: Piedmont Traid Ambulance & Rescue
Engineer: H. Mack Summey, Jr.
Impervious Area (ia)=
0.0582
ac.
Da (contributing drainage area) =
0.068297
ac.
Volume of trench required (includes .4 Porosity) =
506.5
cu. ft.
Length of trench provided =
65.0
ft.
Width of trench provided =
4
ft.
Depth of trench provided =
2
ft.
Soil type =
sandy clay loam
Infiltration rate =
0.011
Volume of trench provided =
520
CF
Water Duality Volume Provided:
208.0
CF
Infiltration Rate (field test) =
2.5
In/hour
Rd = Design Rainfall =
1
Inch
la = BUA/Da
0.852
Rv = .05+0.9 x la
0.817
Volume of Runoff to Treat = 3630 x Rd x Rv x Da
202.597
CIF
Actual Drawdown Time in Trench =
3.740
Hours
Actual Drawdown Time in Trench =
0.156
Days

INFILTRATION TRENCH No.
3
Project: Piedmont Traid Ambulance & Rescue
Engineer: H. Mack Summey, Jr.
Impervious Area (la)=
0.0994
ac.
Da (contributing drainage area) =
0.113728
ac.
Volume of trench required (includes .4 Porosity) =
863.5
cu. ft.
Length of trench provided =
90.0
ft.
Width of trench provided =
5
ft.
Depth of trench provided =
2
ft.
Soil type =
sandy clay loam
Infiltration rate =
0.011
Volume of trench provided =
900
CF
Water Quality Volume Provided:
360.0
CF
Infiltration Rate (field test) =
2.5
In/hour
Rd = Design Rainfall =
1
Inch
la = BUAIDa
0.874
Rv = .05+0.9 x la
0.837
Volume of Runoff to Treat = 3630 x Rd x Rv x Da
345.391
CF
Actual Drawdown Time in Trench =
3.684
Hours
Actual Drawdown Time in Trench =
0.154
Days
INFILTRATION TRENCH No.
2
Project: Piedmont Traid Ambulance & Rescue
Engineer: H. Mack Summey, Jr.
Impervious Area (la)=
0.0457
ac.
Da (contributing drainage area) =
0.053972
ac.
Volume of trench required (includes .4 Porosity) =
397.6
cu. ft.
Length of trench provided =
41.0
ft.
Width of trench provided =
6
ft.
Depth of trench provided =
2.5
ft.
Soil type =
sandy clay loam
Infiltration rate =
0.011
Volume of trench provided =
615
CF
Water Quality Volume Provided:
246.0
CF
Infiltration Rate (field test) =
2.5
In/hour
Rd = Design Rainfall =
1
Inch
la = BUA/Da
0.846
Rv = .05+0.9 x la
0.812
Volume of Runoff to Treat = 3630 x Rd x Rv x Da
159.046
CF
Actual Drawdown Time in Trench =
3.103
Hours
Actual Drawdown Time in Trench =
0.129
Days

INFILTRATION TRENCH No.
61
Project: Piedmont Traid Ambulance & Rescue
Engineer: H. Mack Summey, Jr.
Impervious Area (la)=
0.0138
ac.
Da (contributing drainage area) =
0.019949
ac.
Volume of trench required (includes .4 Porosity) =
121.6
cu. ft.
Length of trench provided =
20.0
ft.
Width of trench provided =
7
ft.
Depth of trench provided =
2.5
ft.
Soil type
sandy clay loam
Infiltration rate =
0.011
Volume of trench provided =
350
CF
Water Quality Volume Provided:
140.0
CF
Infiltration Rate (field test) =
2.5
In/hour
Rd = Design Rainfall =
1
Inch
la = BUA/Da
0.690
Rv = .05+0.9 x la
0.671
Volume of Runoff to Treat = 3630 x Rd x Rv x Da
48.620
CF
Actual Drawdown Time in Trench =
1.667
Hours
Actual Drawdown Time in Trench =
0.069
Days
INFILTRATION TRENCH No. 6
Project: Piedmont Traid Ambulance & Rescue
Engineer: H. Mack Summey, Jr.
Impervious Area (la)=
0.0110
ac.
Da (contributing drainage area) =
0.01669
ac.
Volume of trench required (includes .4 Porosity) =
97.0
cu. ft.
Length of trench provided =
15.0
ft.
Width of trench provided =
3.5
ft.
Depth of trench provided =
2
ft.
Soil type =
sandy clay loam
Infiltration rate =
0.011
Volume of trench provided =
105
CF
Water Quality Volume Provided:
42.0
CF
Infiltration Rate (field test) =
2.5
In/hour
Rd = Design Rainfall =
1
Inch
la = BUA/Da
0.656
Rv = .05+0.9 x la
0.640
Volume of Runoff to Treat = 3630 x Rd x Rv x Da
38.803
CF
Actual Drawdown Time in Trench =
3.548
Hours
Actual Drawdown Time in Trench =
0.148
Days

INFILTRATION TRENCH No.
VA
Project: Piedmont Traid Ambulance & Rescue
Engineer: H. Mack Summey, Jr.
Impervious Area (la)=
0.0411
ac.
Da (contributing drainage area) =
0,056818
ac.
Volume of trench required (includes .4 Porosity) =
361.8
cu. ft.
Length o#'trench provided =
37.0
ft.
Width of trench provided =
4
ft.
Depth of trench provided =
2.5
ft.
Soil type =
sandy clay loam
Infiltration rate =
0.011
Volume of trench provided =
370
CF
Water Quality Volume Provided:
148.0
CF
Infiltration Rate (field test) =
2.5
In/hour
Rd = Design Rainfall =
1
Inch
la = BUA/Da
0.724
Rv = .05+0.9 x la
0.702
Volume of Runoff to Treat = 3630 x Rd x Rv x Da
144.714
CF
Actual Drawdown Time in Trench =
4.693
Hours
Actual Drawdown Time in Trench =
0.196
Days
INFILTRATION TRENCH No. 8
Project: Piedmont Traid Ambulance & Rescue
Engineer: H. Mack Summey, Jr.
Impervious Area (la)=
0.0677
ac.
Da (contributing drainage area) =
0.082553
ac.
Volume of trench required (includes .4 Porosity) =
590.2
cu. ft.
Length of trench provided =
75.0
ft.
Width of trench provided =
4
ft.
Depth of trench provided =
2
ft.
Soil type =
sandy clay loam
Infiltration rate =
0,011
Volume of trench provided =
600
CF
Water Quality Volume Provided:
240.0
CF
Infiltration Rate (field test) =
2.5
In/hour
Rd = Design Rainfall =
1
Inch
la = BUA/Da
0.820
Rv = .05+0.9 x la
0.788
Volume of Runoff to Treat = 3630 x Rd x Rv x Da
236.084
CF
Actual Drawdown Time in Trench =
3.777
Hours
Actual Drawdown Time in Trench =
0.157
Days
Total Volume of Treatment Required for Site: 2166.00 CFurnMQ�
Total Volume of Treatment Provided for Site: 2184.0 CF

FV(.1114lSI
ATLANTIC COAST ENGINEERING AND TESTING, INC.
8 LOCKHEED COURT GREENSBORO, N.C. 27409
PRONE: 336-664-5900
AC-4 828
REPORT
OF
IN -SITU SOILS INFILTRATION RATE
PROJECT: Piedmont Triad Ambulance & Rescue, High Point, NC
REPORT -TO: Surniney Engineering Associates, PLLC, Asheboro, NC
May 10: 2010
Two.hand auger borings were advanced 18" deep, water saturated for four; hours, refilled
and measured ° The test method. was laased an experience with ;field testing under siirttlar
conditions and historical:data frorri similar -soils Should --a. more deiailed, reportbe needed
a forinal test program. will be required:
Results areas follows;
Test41-::- T S 30' E of SW-Com of Parking; Lot; approx. 3.%4"o'diameter.
Filled 1045..=down 5" at 2:45
2:45 =. Full
2:48 3jV .
3:00 : 11/2"
3:30 - 21/"
3:45 '- 2%"
Infiltration Rater 0.083: gal/sf/hr 7..y . t'��
'rest #2 6,'. S 5'. E of SW Corner of -larking L, t; approx. 3.1/4" diameter
Filled 14:5S 7 down 6" at 135
2 : 5 5 =: )j ull frtl+� :: Hfl L5
2:58 =.ya" . s
. 3:10 :- 11/4
3:25 - 1'/s"
3 :40 2%'.'
3:55 - 2%'
Infiltration Rate: 0 087 gaUsf/hr -7. 8 0
INSPECTOR: J. Higgins .

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Page 2 of 2
NedmontTriaii Ambulance
& R6cue
May. 10, 2Q 10
AC-4828
If we can provide addition information please contact ouroffice at your convenience.
ATLANTIC COAST ENGINEERING
AND TESTING; INC.
C: B: Higgins; Jr:,: anager
Ddnald M. Woack, .-E.
NC PE 05060
add
Attachments:.
Test Locatidn
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ATLANTIC COAST ENGINEERING AND TESTING, INC.
8 LOCKHEED COURT :. GREENSBORO, N.C. 27409
Pilwt-' 336-664-5900
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_ 123 Manley Avenue
Phone: [phone]
Greensboro. -`JG 2740i
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Scott F. Cole
Licensed Soil Scientist
312 Copple's Road Ext.
Asheboro, NC 27205-0711
H: [phone]; M: [phone]
Summey Engineering Associates
Attn: Mr. Mack Summey
1342 E. Salisbury Street
Asheboro, NC 27203
January 19, 2010
Re: Identification of the seasonal high-water table for storm -water infiltration devices at Piedmont Triad
Ambulance and Rescue facility. off Balfour Ave., Asheboro, NC.
Mr. Summey,
Per your request, soil conditions were evaluated at multiple locations on the above -referenced property to
determine the depth of the seasonal high-water table. Work was conducted to satisfy requirements set forth in
the North Carolina Division of Water Quality Stormwater Best Management Practices Manual.
Soil borings around proposed wet ponds and future sand filters were evaluated. Samples were collected with
hand augers.
The seasonal high-water table is determined by a field evaluation for soil wetness conditions. Soil wetness
conditions are determined by the presence of colors with a chroma of 2 or less (in Munsell color notation) in
mottles or the horizon matrix. Colors of chroma 2 or less due to relic minerals from the parent material
(underlying rock) are not considered as indicators for soil wetness conditions.
RESULTS
• Infiltration Trench # I
Base elevation: 102.2'
Seasonal high-water not observed within 6.0' of surface (96.2')
• Infiltration Trench # 2
Base elevation: 102.2'
Seasonal high-water not observed within 6' of surface (96.2')
• Infiltration Trench # 3
Base elevation: 101.2'
Seasonal high-water not observed within 6' of surface (95.2')

Infiltration Trench # 4
Base elevation: 100.2'
Seasonal high-water not observed within 6' of surface (94.2')
• Infiltration Trench # S
Base elevation: 98.2'
Seasonal high-water not observed within 6' of surface (92.2')
• Infiltration Trench # 6
Base elevation: 98.2'
Seasonal high-water not observed within 6' of surface (92.2')
• Infiltration Trench # 7
Base elevation: 100.2'
Seasonal high-water not observed within 6' of surface (94.2')
Infiltration Trench # 8
Base elevation: 102.2'
Seasonal high-water not observed within 6' of surface (94.2')
The attached map shows the location of each sampling point, its elevation, and the elevation at which the
seasonal high-water table was observed (if applicable).
I am pleased to be of service in this matter and will be available, if necessary, to provide additional services that
may aid in the successful completion of this project.
Thank you,
Scott F. Cole
North Carolina Licensed Soil Scientist
pq /p
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4 inch = 50 toot

AGA
CDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue Coleen H. Sullins
Governor Director
August 6, 2009
Ricky R. Crotts
PO Box 534
High Point, North Carolina 27261
RECEIVED
N.C, Deot. of ENR
AUG 1 12009
Winston -Sale,,
Regionaf of`+ce
Subject: Post -Construction Notification
Project ID: RANDO-2010-002
Project: Piedmont Triad Ambulance & Rescue, Inc.
Randolph County, North Carolina
Dear Sir,
Dee Freeman
Secretary
A review of the Financial Responsibility/Ownership (FRO) form required under the
Sedimentation Pollution Control Act received on July 6, 2009 has determined that the Piedmont Triad
Ambulance & Rescue, Inc, project may be subject to a State Stormwater Permit for Post -construction.
Unless excluded under the provisions of Session Law 2006-246, Section 8, you must submit
within 30 days an application for a Post -Construction Stormwater Permit to:
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Stormwater Permitting Unit
Post -Construction Application
1617 Mail Service Center
Raleigh, NC 27699-1617 .
.The Post -construction permit is in addition to a North Carolina General Permit (NCG010000)
permit received for construction activity from the Division of Water Quality. For more information
regarding MSI Post -Construction and Phase II Session Law 2006-246 please visit:
http://112o.enr.state.nc.us/su/NPDES_Pliase_I I_Stormwater_Program.htm
If you have any questions concerning this matter please feel free to call me at 919-807-6365 or e-
mail me at [e-mail].
Sincerely,
Co ell
cc: ',Winston-Salem Regional Office, Surface Water Protection Section
Stormwater Permitting Unit Files
Wetlands and Stormwater Branch
1617 Mail Service Cbnter, Raleigh, North Carolina 27699-1617
Location: 512 N, Salisbury St. Raleigh, North Carolina 27604
Phone: [phone] FAX: [phone] Customer Service:1-877-623-6748
Internet: www.ncwaterqualiV.org
Nne
orthCaroi i.na
AIMIMrll11
An Equal Opportunity 1 Affirmative Action Employer