SW8960823_HISTORICAL FILE_19960911

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW8 0 lu C3i 23
DOC TYPE
❑ CURRENT PERMIT
❑ APPROVED PLANS
® HISTORICAL FILE
❑ COMPLIANCE EVALUATION INSPECTION
DOC DATE
1"C1Ilo Oq 11
YYYYMMDD

State of North Carolina
Department of Environment,
Health and Natural Resources
Division of Water Quality A
A
James B. Hunt, Jr., Governor ®C films A
Jonathan B. Howes, Secretary C �l
A. Preston Howard, Jr., P.E., Director
September 11, 1996
Dr. Dale F. Martin, Superintendent
New Hanover County Schools
1802 South Fifteenth Street
Wilmington, North Carolina 28401
Subject: Permit No. SW8 960823
Wrightboro Elementary School Renovations/Additions
High Density Stormwater Project
New Hanover County
Dear Dr. Martin:
The Wilmington Regional Office received the Stormwater Management Permit Application for Wrightboro Elementary
School Renovations/Additions on August 26, 1996. Staff review of the plans and specifications has determined that the
project, as proposed, will comply with the Stormwater Regulations set forth in Title 15A NCAC 2H.1000. We are
forwarding Permit No. SW8 960823 dated September 11, 1996, for the construction of the renovations and additions to
Wrightboro Elementary School.
This permit shall be effective from the date of issuance until September 11, 2006, and shall be subject to the conditions
and limitations as specified therein. Please pay special attention to the Operation and Maintenance requirements in this
permit. Failure to establish an adequate system for operation and maintenance of the stormwater management system will
result in future compliance problems.
If any parts, requirements, or limitations contained in this permit are unacceptable, you have the right to request an
ajudicatory hearing upon written request within thirty (30) days following receipt of this permit. This request must be
in the form of a written petition, conforming to Chapter 150B of the North Carolina General Statutes, and filed with the
Office of Administrative Hearings, P.O. Drawer 27447, Raleigh, NC 27611-7447. Unless such demands are made this
permit shall be final and binding.
If you have any questions, or need additional information concerning this matter, please contact Linda Lewis, or me at
[phone].
Sincerely,�����
Jim Bushardt, P.E.
Acting Regional Water Quality Supervisor
1BB/arl: S:\WQS\STORMWAT\PERMIT\960823.SEP
cc: Phil Norris, P.E.
Tony Roberts, New Hanover County Inspections
Linda Lewis
Wilmington Regional Office
Central Files
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer

State Stormwater Management Systems
Permit No. SW8 960823
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT, HEALTH AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
STATE STORMWATER MANAGEMENT PERMIT
HIGH DENSITY DEVELOPMENT
In accordance with the provisions of Article 21 of Chapter 143, General Statutes of North Carolina as amended,
and other applicable Laws, Rules, and Regulations
PERMISSION IS HEREBY GRANTED TO
New Hanover County Schools
Mightboro Elementary School Renovations/Additions
New Hanover County
FOR THE
construction, operation and maintenance of an Infiltration Pond in compliance with the provisions of 15A
NCAC 2H .1000 (hereafter referred to as the "stormwater rules') and the approved stormwater management
plans and specifications and other supporting data as attached and on file with and approved by the Division
of Water Quality and considered a part of this permit.
This permit shall be effective from the date of issuance until September 11, 2006 and shall be subject to the
following specified conditions and limitations:
I. DESIGN STANDARDS
1. This permit is effective only with respect to the nature and volume of stormwater described in the application and
other supporting data.
2. This stormwater system has been approved for the management of stormwater runoff as described on page 3 of
this permit, the Project Data Sheet. The stormwater control has been designed to handle the runoff from 66,200
square feet of impervious area.
3. Approved plans and specifications for this project are incorporated by reference and are enforceable parts of the
permit.
2

Project Name:
Permit Number:
Location:
Applicant:
Mailing Address:
Application Date:
Water Body Receiving Stormwater Run
Classification of Water Body:
If Class SA, chloride sampling results:
Infiltration Pond Depth:
Bottom Elevation:
Total Impervious Surfaces Allowed:
Green Area entering Pond:
Surface Area Provided at 96:
Surface Area Provided at top 97:
Required Storage Volume:
Provided Storage Volume:
Expected Infiltration Rate:
Type of Soil:
Drawdown Time:
Elevation of Seasonal High Water Table
State Stormwater Management Systems
Permit No. SW8 960823
DIVISION OF WATER QUALITY
PROJECT DATA SHEET
Wrightboro Elementary School Renovations/Additions
960823
New Hanover County
Dr. Dale F. Martin, Superintendent
New Hanover County Schools
1802 South Fifteenth Street
Wilmington, North Carolina 28401
August 26, 1996
off: UT Cape Fear River
"C'.
N/A
1 foot
96 MSL
66,200 square feet
40,000 square feet
5,280 square feet
8,060 square feet
5,283 cubic feet
6,670 cubic feet
1.15 in/hr (.72 gallons/hour/square foot)
Silty sand
13.2 hours
94 MSL
93

State Stormwater Management Systems
Permit No. SW8 960823
4. The tract will be limited to the amount of built -upon area indicated on page 3 of this permit, and per approved
plans.
5. The permittee is responsible for verifying that the proposed built -upon area does not exceed the allowable built -
upon area.
6. The following items will require a modification to the permit:
a. Any revision to the approved plans, regardless of size.
b. Project name change.
C. Transfer of ownership.
d. Redesign or addition to the approved amount of built -upon area.
e. Further subdivision of the project area.
f. Filling in, altering, or piping of any vegetative conveyance shown on the approved plan.
In addition, the Director may determine that other revisions to the project should require a modification to the
permit.
The Director may notify the permittee when the permitted site does not meet one or more of the minimum
requirements of the permit. Within the time frame specified in the notice, the permittee shall submit a written time
schedule to the Director for modifying the site to meet minimum requirements. The permittee shall provide copies
of revised plans and certification in writing to the Director that the changes have been made.
H. SCHEDULE OF COMPLIANCE
The permittee will comply with the following schedule for construction and maintenance of the stormwater
management system:
a. The stormwater management system shall be constructed in it's entirety, vegetated and operational for
it's intended use prior to the construction of any built -upon surface except roads.
b. During construction, erosion shall be kept to a minimum and any eroded areas of the system will be
repaired immediately.
2. The permittee shall at all times provide the operation and maintenance necessary to assure the permitted
stormwater system functions at optimum efficiency. The approved Operation and Maintenance Plan must be
followed in it's entirety and maintenance must occur at the scheduled intervals including, but not limited to:
a. Semiannual scheduled inspections (every 6 months).
b. Sediment removal.
C. Mowing and revegetation of side slopes.
d. Immediate repair of eroded areas.
e. Maintenance of side slopes in accordance with approved plans and specifications.
f. Debris removal and unclogging of outlet structure, catch basins and piping.
Records of maintenance activities must be kept and made available upon request to authorized personnel of DWQ.
The records will indicate the date, activity, name of person performing the work and what actions were taken.
This permit shall become voidable unless the facilities are constructed in accordance with the conditions of this
permit, the approved plans and specifications, and other supporting data.
11

State Stormwater Management Systems
Permit No. SW8 960823
5. Upon completion of construction, prior to issuance of a Certificate of Occupancy, and prior to operation of this
permitted facility, a certification must be received from an appropriate designer for the system installed certifying
that the permitted facility has been installed in accordance with this permit, the approved plans and specifications,
and other supporting documentation. Any deviations from the approved plans and specifications must be noted
on the Certification.
6. A copy of the recorded deed restrictions must be submitted to the DWQ within 30 days of the date of the
recording. The recorded copy must be signed by the permittee, dated, stamped with the deed book number and
page, and bear the stamp of the Register of Deeds.
A copy of the approved plans and specifications shall be maintained on file by the Permittee for a minimum of
ten years from the date of the completion of construction.
III. GENERAL CONDITIONS
This permit is not transferable. In the event there is a desire for the facilities to change ownership, or there is
a name change of the Permittee, a formal permit request must be submitted to the Division of Water Quality
accompanied by an application fee, documentation from the parties involved, and other supporting materials as
may be appropriate. The approval of this request will be considered on its merits and may or may not be
approved.
2. Failure to abide by the conditions and limitations contained in this permit may subject the Permittee to
enforcement action by the Division of Water Quality, in accordance with North Carolina General Statute 143-
215.6(a) to 143-215.6(c).
The issuance of this permit does not preclude the Permittee from complying with any and all statutes, rules,
regulations, or ordinances which may be imposed by other government agencies (local, state, and federal) which
have jurisdiction.
4. In the event that the facilities fail to perform satisfactorily, including the creation of nuisance conditions, the
Permittee shall take immediate corrective action, including those as may be required by this Division, such as
the construction of additional or replacement stormwater management systems, or the complete restoration of the
system.
5. The permittee grants DEHNR Staff permission to enter the property for the purpose of inspecting all components
of the permitted stormwater management facility.
6. The permit may be modified, revoked and reissued or terminated for cause. The filing of a request for a permit
modification, revocation and reissuance or termination does not stay any permit condition.
Permit issued this the I Ith day of September, 1996.
NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION
92 di-2 -.tlerek
A. e n Howard, Jr., P.E., Director
Division of Water Quality
By Authority of the Environmental Management Commission
Permit Number SW8 960823

State Stormwater Management Systems
Permit No. SW8 960823
Wrightboro Elementary School Renovations/Additions
Stormwater Permit No. SW8 960823
New Hanover County
Engineer's Certification
I, as a duly registered Professional Engineer in the State of North
Carolina, having been authorized to observe (periodically/weekly/full time) the construction of the project,
for (Project Owner) hereby state that, to the best of my abilities, due care and
diligence was used in the observation of the project construction such that the construction was observed to be built within
substantial compliance and intent of the approved plans and specifications.
Noted deviations from approved plans and specification:
Signature
Registration Number
Date
0

== Andrew & Kuske
CONSULTING ENGINEERS, INC.
John R. Andrew, P.E.
J. A. Kuske, P.E.
J. Phillip Norris, P.E.
STORMWATER MAINTENANCE SYSTEM MAINTENANCE PROCEDURES
WRIGHTSBORO SCHOOL
A&K PROJECT NO. 95089 U � : n
RESPONSIBLE PARTY E C 1 V u 1
A. The project will be built and maintained by:
New Hanover County Schools AUG 2 6 1996
1802 South 15th Street o e
Wilmington, NC 28401 PROJ # ' yg�oSZ5
910-763-5431
INFILTRATION AREAS AND COLLECTION SYSTEM
A. The infiltration areas will be checked after every major storm event to insure that the inlet
structures are working properly and are not clogged with debris. Remove any accumulated sediment or
debris. Any signs of erosion or deterioration of side slopes or any other feature must be repaired before the
next storm event.
B. The depth of the infiltration areas will be checked every six months to determine the depth of
the storage zone. The infiltration areas will be cleaned out when silt deposits reduce the depth of the storage
zone below 2.0 feet. The side slopes of the infiltration areas shall be mowed as required to maintain a grass
height not to exceed 8 inches in height.
A1� 1U C. Collection basins and piping will be checked every six months and kept clear as necessary.
D. %he s 5fmn be /es/b/-ed ;o Garr; fie d cG�G ht� 1 v » ✓er; �Czho�
3. CERTIFICATION -ff1 o f 41)e sysf�r ha/s fa l ed.
The owner will submit to the Department of Environment, Health and Natural Resources an
Engineer's Certific on t the stormwater facilities were constructed in accordance with approved plans.
�s A;1J �, ,,Z.,X-5� y 9 5�
sign ture: Chairman date signature: Superintendent date
NOTARY'S CERTIFICATIONS
State of /brt)� C Qrvllna County of NCu7
I, La ' T ram- a Notary Public in and for the State and County aforesaid,
certify that 7-LAAa 0- - C Ct ve_npersonally appeared before me this day and
acknowledged the due execution of the foregoing instrument.
WITNESS my hand and notarial seal, this the q�l day of a 1995.
My CVNQ P4 ON SEPTEMBER 1. 1999
NoLafy Public
State of Forth Caro/;.-C'i County of AltLO (fir 6✓e.4)
1;,, T a 'A. a a Notary Public in and for the State and County aforesaid,
certify that F. In in personally appeared before me this day and
acknowledged the due execution of the foregoing instrument.
WITNESS my hand and notarial seal, this the L/7- day of Q,u9u-st 1995.
My Commission Expires Gin �, Lj_t�
otary Public
eER 1, teas
202 North Fifth Avenue Wilmington, North Carolina 28401 Telephone: [phone] Facsimile: 910/343-9604

DIVISION OF ENVIRONMENTAL MANAGEMENT A&K #95089
y
NORTH CAROLINA STORMWATER MANAGEMENT PERMIT APPLICATION
I. GENERAL INFORMATION
1. Project Name
School
2. Location, directions to project (include County, Address, State Road) Attach map. New Hanover
Wilmington, NC located off NC 117
3. Owner's Name New Hanover County Schools Phone [phone]
4. Owner's Mailing Address 1802 South 15th Street
City Wilmington State NC Zip 28401
5. Application date August 15, 1996 Fee enclosed $385.00
6. Nearest Receiving Stream U.T. N.E. Cape Fear River Class C-Swamp
7. Project description Elementary School Addition
II. PERMIT INFORMATION
1. Permit No. cr. �fImi.byDEW-
5WO ga70FZ3
2. Permit Type x New
Renewal Modification (existing Permit No.)
3. Proj Type _ Low Density
Detention x Infiltration Other
_ Redevelop Gen'l _ Dir Cert
4. Other State/Federal Permits/Approvals Required (ch km of i=hi.vk )
CAMA Major
Sedimentation/Erosion Control x
404 Permit
III. BUILT UPON AREA (Pig
= Ncwc 2H.1005 t .I= for 3Mti le d=ty hmio)
Drainage Drainage
Breakdown of Impervious Area
Ba in Min
(Pl iodi-, below W dnip impv i.o .)
Classification
C-Swamp
Buildings 2LJ, ele0 s F
Allowable Impervious Area
30%
Streets �_I./A
Total Project Area
8. 89 Ac.
Parking/SW 600 SF
Proposed Impervious Area
1 .51 AC , ew 5 • Z varm_)
Other
Z
% Impervious Area
34c • 0
Totals Q& ) q00 Sr
IV. STORMWATER TREATMENT (De mb. haw Ne ona win k metmd)
Collected and routed through infiltration basins.

w '. '
V. DEED RESTRICTIONS AND PROTECTIVE COVENANTS
Deed restrictions and protective covenants are required to be recorded for all low density projects and
all subdivisions prior to the sale of any lot. Please see Attachment A for the specific items that must
be recorded for the type of project applied for.
By your signature below, you certify that the recorded deed restrictions and protective covenants for
this project shall include all the items required by the permit, that the covenants will be binding on all
parties and persons claiming under them, that they will run with the land, that the covenant cannot be
changed or deleted without concurrence from the State, and that they will be recorded prior to the sale
of any lot.
VI. OWNER'S CERTIFICATION
I,
Dale F. Martin
, certify that the information included on this permit
(Plw Prim Q W m d-y)
application form is correct, that the project will be constructed in conformance with the approved
plans, that the deed restrictions will be recorded with all required permit conditions, and that to the
best of my knowledge, the proposed project complies with the requirements of 15A NCAC 2H.1000.
I authorize the below named person or firm to submit stormwater plans on my behalf.
VII_ AGENT AUTHORIZATION (MUST BE COMPUTED)
Person or firm name J. Phillip Norris/Andrew & Kuske Consulting Engineers, Inc.
Mailing Address
202 North Fifth Avenue
City Wi]mington State NC Zip 28405
Phone[phone]
Please submit application, fee, plans and calculations to the appropriate Regional Office.
cc: Applicant/WiRO/Central Files
STTf RMWA, TE
n E C E I V E D
AUG 2 61996
D E M
PROJ #5a2'S9&037-3

Andrew & Kuske
CONSULTING ENGINEERS, INC.
August 26, 1996
NC DEHNR/Division of Environmental Management
Water Quality Section
127 Cardinal Drive Extension
Wilmington, NC 28405-3845
Attn.: Ms. Linda Lewis
Re: Re -Submittal of Project
Wrightsboro Elementary School
Old Stormwater Project No. SW8 950817
A&K Project No. 96155
Dear Ms. Lewis:
John R. Andrew, P.E.
J. A. Kuske, P.E.
J. Phillip Norris, P.E.
We have enclosed for your review and approval three (3) sets of
project plans, calculations, soils reports, permit application
fee of $385.00, application and maintenance procedures.
This project represents a scaled down version of the original
project sent to you on August 15, 1995 which was returned in
October of 1995. The project now has one infiltration area as
compared to the original three. As you were fairly far along
with your original review we hope that you will be able to
continue and complete the review of this submittal soon. The
Owner is anxious, to put this project out for bid and any
assistance you can give us will be appreciated.
Sincerely,
ANDREW SKE
ON ING NGINEERS, NC.
J. Phi lip Norr P.E.
cc: Ken Phelps/Boney Architects
nECEIVE
Iunl{f AUG 2 61996 D
PROJ # J
202 North Fifth Avenue Wilmington, North Carolina 28401 Telephone: [phone] Facsimile: 910/343-9604

:�
Date Design Andrew and Kuske Sheet
p CONSULTING ENGINEERS, INC.
u - lJlo �J 202 N. Fifth Ave. Wilmington. N.C. 28401 Ot
Check Job ForJob No.
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?arn� /.nPFr�vio�� /PfC = lJ(�aa�
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STORMWATER
E C F i V E D
�( AUG 2 6 1996
;:°yNtxF�a�S
I�''�,PHILLIP

June 8, 1995
Andrew & Kuske Consulting Engineers
202 North Fifth Avenue
Wilmington, North Carolina 28401
Attention: Mr. Phil Norris, P.E.
Reference: Double Ring Infiltrometer Testing
Wrightsboro Elementary School
Wilmington, North Carolina
Job No. 1063-95-009
Dear Mr. Norris:
RECE1 VEL
`1UN 10 lyys
ANDREW,,nlp HC�cK�
As requested, S&ME, Inc. has recently completed double -ring infiltrometer
testing of the near -surface soils within the area of the proposed run-off drainage swales
at the subject site. It is our understanding that the depth of the proposed swales will be
approximately 18 to 24 inches. This letter and the attached data sheets describe our field
work and summarize our findings.
FIELD WORK
In order to estimate soil drainage parameters for the near -surface soi:s in the
area of the proposed swales, our personnel performed the following work items:
1. Conducted four double -ring infiltrometer tests at depths ranging om 16
to 23 inches below existing site grade at the locations shown in the
attached sketch. This testing was conducted in general accordance
with ASTM D-3385 entitled, "Infiltration Rate of Soils in Field Using
Double -Ring Infiltrometer".
2. Advanced hand auger borings adjacent to each infiltrometer test location
in order to classify the in -place soils. A Munsell Soil Color Chart was
used to aid in estimating the depth of the seasonal high water fable.
3. Obtained samples of the in -place soils occurring at each test depth and
tested representative samples in our laboratory in general accordance
with ASTM D-422 entitled, "Particle Size Analysis of Soils".
^` SWE, Inc. 6409 Amsrerdom Way, Building BJ, Wilmington, North Corolino 28405, [phone], Fox (910: 799-9958

Andrew & Kuske Consulting Engineers
June 8, 1995
Page 2
FINDINGS
Based on our field classifications and the results of our laboratory testing, the
generalized profile of the near -surface soils in the test areas consists of the following:
Depth Soil Description
0-3.5' Fine Silty SAND (SM)
3.5'-7.0' Fine Silty SAND, trace to some clay (SM)
7.0'-Completed CLAY, trace of fine sand (CH)
Boring Depth
Soil coloration and cementation in the above profile indicate that a perched
water condition could occur at some portions of the site in the upper 12 to 24 inches.
In general, though, the seasonal high water table level is at, or near, the interface between
the silty sands and the underlying clay layer.
Measured infiltration rates in the near -surface silty sands range from 1.15 to
3.16 inches per hour (0.7 to 2.0 gallons per square foot per hour).
CONCLUDING REMARKS
We recommend that all of the proposed infiltration swales be excavated to
a depth sufficient to remove any cemented soils occurring in the upper 1 to 2 feet of site
grade.
S&ME appreciates the opportunity to provide our services during this phase
of the project. Should you have any questions after reviewing this letter, or if we can be
of additional assistance, please do not hesitate to contact us at your convenience.
Very truly yours,
S&ME, INC.
Steven D. Kelly, E.
Branch Manage
SDK/jns
Attachments

Double Ring Infiltrometer Testing
Wrightsboro Elementary School
Wilmington, North Carolina
Job No. 1063-95-009
Location: #1
Date of Test: May 24, 1995
Depth of Test Below Site Grade: 16 inches
Depth of Water in Rings: 10% inches
Inner Diameter of Inner Ring: 11 t/4 inches
Inner Diameter of Outer Ring: 22% inches
Graphic Plot of Test
10 0 0 10 °0 zo 70 8o 90 100 110 120
_ PSEO TINE (MINUTES)
!TOTE: Dasneo line reoresents average infiltration rate
Average Infiltration Rate: 2.15 inches/hour
Soil Profile
Location Depth
Hue/Chroma
Soil Description
1 0-0.5'
Gray Fine SAND
0.5'-1.3'
10 YR
4/3
Brown Silty Fine SAND
1.3'-7.0'
2.5 Y
5/2
Tan Silty Fine SAND
7.0'-7.5'
2.5 Y
7/3
Tan Silty Fine SAND, a Little Clay
7.5'-9.5'
2.5 Y
7/1
Gray CLAY, Trace of Fine Sand
S&ME, Inc.
6409 Amsterdam Way, Bldg. B-3
Wilmington, North Carolina 28405

Double Ring Infiltrometer Testing
Wrightsboro Elementary School
Wilmington, North Carolina
Job No. 1063-95-009
Location: #2
Date of Test: May 25, 1995
Depth of Test Below Site Grade: 22 inches
Depth of Water in Rings: 10'/2 inches
Inner Diameter of Inner Ring: 11 % inches
Inner Diameter of Outer Ring: 223/,s inches
Graphic Plot of Test
0 _o o =a _D 10 o 30 90
_nPSED TINE (NPIUTES!
,OTE: _jsned line redresenis averaae inriltration rate
Average Infiltration Rate: 1.15 inches/hour
Soil Profile
Location Depth
Hue/Chroma
Soil Description
2 0-0.75'
10 YR
4/1
Dark Gray Fine SAND, Trace of Silt
0.75'-1.5'
7.5 YR
7/1
Light Gray Silty Fine SAND
1.5'-2.0'
10 YR
4/3
Brown Silty Fine SAND, Cemented Particles
2.0'-3.75'
2.5 Y
5/4
Light Olive Brown Silty Fine SAND
3.75'-4.25'
10 YR
3/4
Dark Yellowish Brown Silty Fine SAND, a
Little Clay
4.25'-4.5'
10 YR
5/8
Yellowish Brown Silty Fine SAND, Some Clay
4.5'-7.5'
7.5 YR
5/8
Strong Brown Silty Fine SAND
7.5'-10.0'
2.5 Y
7/1
Gray CLAY, Trace of Fine Sand
S&ME, Inc.
6409 Amsterdam Way, Bldg. B3
Wilmington, North Carolina 28405

Double Ring Infiltrometer Testing
Wrightsboro Elementary School
Wilmington, North Carolina
Job No. 1063-95-009
Location: #3
Date of Test: May 26, 1995
Depth of Test Below Site Grade: 23'/z inches
Depth of Water in Rings: 93/a inches
Inner Diameter of Inner Ring: 11 "/16 inches
Inner Diameter of Outer Ring: 22'/4 inches
5
Graphic Plot of Test
0
10 20 30 40 50 60 70 80 90
ELAPSED TIME (MINUTES)
IJOTE: Dashed line represents average infiltration rate
Average Infiltration Rate: 3.16 inches/hour
Location Depth Hue/Chroma
3 0-0.5'
10 YR
4/1
0.5'-1.0'
7.5 Y
7/1
1.0'-2.0'
10 YR
5/4
2.0'-3.5'
2.5 Y
6/4
3.5'-4.0'
2.5 Y
5/6
4.0'-5.0'
2.5 Y
7/3
5.0'-5.5'
7.5 YR
5/8
5.5'-6.0'
7.5 YR
5/8
6.0'-8.0'
2.5 Y
7/1
Soil Profile
Soil Description
110 1
Dark Gray Fine SAND
Light Gray Silty Fine SAND
Yellowish Brown Silty Fine SAND
Light Yellowish Brown Silty Fine SAND
Light Olive Brown Silty Fine SAND, Some Clay
Pale Yellow Silty Fine SAND
Strong Brown Silty Fine SAND, Some Clay
Strong Brown Clayey Fine SAND
Gray CLAY, Trace of Fine Sand
S&ME, Inc.
6409 Amsterdam Way, Bldg. B3
Wilmington, North Carolina 28405

Double Ring Infiltrometer Testing
Wrightsboro Elementary School
Wilmington, North Carolina
Job No. 1063-95-009
Location: #4
Date of Test: May 30, 1995
Depth of Test Below Site Grade: 23 %= inches
Depth of Water in Rings: 9% inches
Inner Diameter of Inner Ring: 111/4 inches
Inner Diameter of Outer Ring: 233/a inches
Graphic Plot of Test
7 i
4—
— — — — _
I
0
10 20 �0 -0 50 .60 70 80
90 100 110 120
APSE] TIME (MINUTES)
NOTE: Dasnea line represents averaqe infiltration rate
Average Infiltration Rate: 1.36 inches/hour
Soil Profile
Location Depth
Hue/Chroma
Soil Description
1 0-0.5'
Gray Fine SAND
0.5'-1.3'
10 YR
4/3
Brown Silty Fine SAND
1.3'-7.0'
2.5 Y
5/2
Tan Silty Fine SAND
7.0'-7.5'
2.5 Y
7/3
Tan Silty Fine SAND, a Little Clay
7.5'-9.5'
2.5 Y
7/1
Gray CLAY, Trace of Fine Sand
SWE, Inc.
6409 Amsterdam Way, Bldg. B-3
Wilmington, North Carolina 28405

TABLE 1
Gradation Test Results
Wrightsboro Elementary School
Wilmington, North Carolina
Job No. 1063-95-009
Location
1
1
2
3
Depth
1.3'-7.0'
7.5'-9.5'
2.0'-3.75'
2.0'-3.5'
Sieve Size
Percent Passing,
By Weight
#4
100.0
100.0
100.0
100.0
#10
100.0
100.0
100.0
100.0
#40
91.3
99.0
92.1
92.3
#80
47.2
94.9
42.3
35.1
#200
39.2
92.2
32.4
26.9
Percent Moisture:
8.4
26.4
6.6
6.0
Soil Description:
Tan Silty Fine
Gray CLAY -
Tan Silty
Tan Silty
SAND, Trace
Trace of Fine
Fine SAND
Fine SAND
of Clay
Sand
S&ME, Inc.
6409 Amsterdam Way, Bldg. B-3
Wilmington, North Carolina 28405

NO12TH
i—
I
i
®2 I
® 1,4
4
0
OZ
4
A
uJ
® 3
Nw !. 111
® Approximate location of double -ring infiltrometer testing
PROJECT SCALE: 1"= 100'
WRIGHTSBORO SCHOOL J 0 B NO: 1063-95-009
WILMINGTON, NC SM FIG. NO:
154C