GW97181/DEH97-52_Correspondence_19971030

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GROUNDWATER SECTION GW#
DIVISION OF WATER QUALITY
97181
DEH # 97-52
RECORD OF WASTE DISPOSAL PERMIT APPLICATION REVIEW
REVIEW BY Beth Madis DATE .l0/30/97 FIELD INVESTIGATION? (Y/N) 10/13/97
FACILITY NAME Old Wire Rd. School COUNTY Hoke
LOCATION SW of int. of SRs 1003 & 1439, -7 mi. E of Raeford, NC
TYPE OF DISPOSAL SYSTEM (LAGOON, ETC.) Large septic system DESIGN CAP. (GPD) -5400
(based on 600 students at 9 gal/student/day)
DESCRIPTION OF FACILITY New school with on -site wastewater treatment.'
SIZE OF IMPOUNDMENT (FT SQ.) _ &/OR SIZE OF APPLICATION AREA -25 , 000 sq. ft.
WASTE SOURCE: MUN. SLUDGE_ MUN. W.WATER _; _ PRIMARY _ SECONDARY _ TERTIARY
IND. SLUDGE _ IND. WELL WATER x OTHERS: septage from the school
DISTANCE FROM WASTE SOURCE TO NEAREST: STREAM -iioo FT., WELL >loo FT.
FOR WELL: TYPE OF USE domestic , DEPTH unknown PUMP RATE (EST.) unknown
WHAT DESIGN CONDITIONS WILL REDUCE/INCREASE CHANCE OF GW CONTAMINATION: Slightly
more conservative application rate being used than is needed.
WHAT NATURAL SITE CONDITIONS WILL REDUCE/INCREASE CHANCE OF GW CONTAMINATION: Good
receiving soil; actual gw level is -.29 feet below ground
DEPTH TO: BEDROCK -200 FT., SEASONAL HIGH W.T. >4 FT., ANNUAL W.T. FLUX unk. FT.
SURFICIAL AQUIFER
BEDROCK/ARTESIAN AQUIFER
GEN. LITHOLOGY loamy sand/sandy clay loam
HYD. COND. 3 .8x10-3 FT./DAY 0 MEASURED FT./DAY 0 MEASURED
❑ ESTIMATED
THICKNESS >5 FT.
❑ ESTIMATED
NO. OF MONITOR WELLS: PROPOSED: UP o DOWN o EXISTING: UP o DOWN o
FROM WORKSHEET: SITE NUMERICAL DESCRIPTION = 14 - 2. 7 1 4 A b S
T 1 2 3 4 5 6 6A 6B
SITE GRADE (HYDROGEOL) =
c
SITUATION GRADE =
-12B
PROPOSED SAMPLING SCHEDULE & PARAMETER(S): None at this time.
HAVE THERE BEEN ANY EXCEEDENCES OF THE GROUNDWATER STANDARDS? YES N/A NO _
HAS ANY ENFORCEMENT ACTION BEEN TAKEN? YES N/A NO DATE OF ACTION: N/A
BRIEF SUMMARY OF ENFORCEMENT ACTION TAKEN: N/A
REMARKS/RECOMMENDATIONS (Continue on Reverse, if necessary): FRO recommends issuance of
this permit.
r) Cal^
ID
HYD. REGIONAL SUPER
GW-48 Revised 07/96. by FRO
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Post-it®tFax ote 7671
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Phone
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WANTS TO SEE YOU
URGENT
RETURNEDrYOUR CALL
Message f ier ,f f Ch_ Cr-ry ,e,'1-/
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Signed
N.C. Dept. of Environment, Health, and Natural Resources
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State of North Carolina
Department of Environment,'
Health and Natural Resources
Division of Environmental Health
James B. Hunt, Jr., Governor
Wayne McDevitt, Secretary
Linda C. Sewall, Director
October 17, 1997
Ishwar C. Devkota, P.E.
On -Site Wastewater Sec.
P.O. Box 29594
Raleigh, NC 27626-0954
Dear Ishwar:
17rA
WIT
IDBHNF
On October 13, 1997 I visited the proposed site of the on -site wastewater system'for the
Old Wire Road Elementary School in Hoke Co. Others present were Jeff Eudy, Env, Health
Program Coordinator, Hoke Co.,. and Beth Maddox and her assistant (Groundwater Section,
Fayetteville Regional Office):: On September 12I made one soil :boring near eachof six soil
borings previously made by Bill Dunlop, consulting soil scientist. JeffEudy, Bill Dunlop, and Bill
Bright, consulting- hydrogeologist,' were present- on this occasion. These six soil borings covered -
both the proposed drainfield and repair areas. On Figure No. 2, as provided by Haggett
Engineering Associates,. Inc., these soirborings areidentified as SB 6, SB 4, SB 2, SB1. SB3. and
SB 8. The September 12 visit was before Haggett Engineering Associates, Inc. mailed me a
complete report of the site, including Bill Dunlop's soil profile descriptions.
I find the soil and site to be provisionally suitable. Overall, the top soil horizon is weak
granular loamy sand or sandy loam, very friable, non -sticky and.non-plastic, and ranges in
thickness from 18 to 24 inches. The next soil horizon extends to 60+ inches and is sandy clay
loam and is slightly sticky and slightly plastic: For the most part, there is weak subangular blocky
soil structure and friable moist soil consistence in this horizon: However, infour soil borings, at a
soil depth of 42-to 50 inches, the soilstructure becomes so weak that it -approaches massive and -
the associated moist soil consistence is friable to firm.
Bill Dunlop and I agree on most soil properties when both sets of soil profile descriptions
are compared. 'However, we differ slightly in the following: .
(1). I am more conservative with regards to soil structure. As a result,.I recommend
limiting soil depth to 42 inches. Trench bottoms should be no deeper than 30 inches.
2).' Bill Dunlopinitially proposed an LTAR of 0.6. I propose an LTAR of 0.55.
Please contact me if I can be of further. assistance. You can telephone or fax me at (910)
On=Site Wastewater Section
P.O. Box 29594, Raleigh, NC 27626-0594
Voice 919-733-2895
FAX [phone]
'Mlle C An Equal Opportunity Affirmative Action Employer
50% recycled/10% post -consumer paper

692-4118. My mailing address is 130 Williams Rd., Southern Pines, NC 28387 and my E-mail
address is [e-mail].
Sincerely,
David V. McCloy, Ph.D.
Region V Soils Specialist
c: Steve Steinbeck, Jeff Eudy,Seth Maddox File
•

DIVISION OF WATER QUALITY
GROUNDWATER SECTION
MEMORANDUM /
TO: �^-f j�a�/�-kaA-b�
-eye �4llP
FROM:
Z)AL0e ct./dtit.c 6
Regional Office
SUBJECT: App. for Permit Renewal
Permit Amendment
u EC I
OCT 0 a 1991
mgf MIS !.:. 1.2
Est �::
[1 7,tom �-_D
r/(New-Permit-1
Repair/Alteration of Exist. Disposal System [DEH]
Facility Name: O/o 11..„2 7J- 67eu, . Sc4
County: A 4
Type of Project: Sb4StAi.fAce
APPLICABLE PERMIT NO . s : WQ % 71 g F
rDEH ?7- S-Z A to C
EPA (CONST. GRANTS) UIC
The Groundwater Section has received ONLY ONE (1) copy of the
referenced permit application. A copy of the application should have
been sent to your Regional Water Quality Supervisor, so pleaseuse
that copy for your review - IF A COPY HAS NOT BEEN RECEIVED IN THE
REGIONAL OFFICE, PLEASE LET ME KNOW.
The Groundwater Section received two (2) copies of the referenced
permit application. One copy of the application documents we
received is attached.
The Groundwater Section has received a subsurface disposal project
from the Div. Env. Health's On -Site Wastewater Section.rA c y of
Cthe—app--l-ication_has_be n—forty ra ded to-.-DEH s Region -al, Soil
Spe—ciaiist, 7A04. lfk. c)/- --Please ooc rdinateyour review with
thatSol=Speci_
Pleasereview\the application materials for completeness. If you feel
additional nf.ormaation is necessary, please let me know no later than
(51t 21 1TF7 j A copy of any formal request for additional information
will be `,forwarded/ to you.
N If,.you'do=not need any additional information —to complete your review,
please —provide your final comments by Cjct 2 !t1i7) . if you request
and/or receive additional information, your final comments are due no later
than 14 days' after you receive the additional-1 infoormation.
\TRANS.SHL (rev. 9/04/97)

State of North Carolina
Department of Environment,
Health and Natural Resources
Division of Water Quality
James B. Hunt, Jr., Governor
Wayne McDevitt, Secretary
-A. Preston Howard, Jr., P.E.; Director
MEMORANDUM
h vot
.A /fr
Adiimaftwilk
�EHNR
DIVISION OF WATER QUALITY
GROUNDWATER SECTION
October 30, 1997
To: Bill Jeter, Chief
On -Site Wastewater Section
Through:
From:
Subject:
Bob Cheek f' »
David Goodrich
1,161
ECEIVED
Nov 0 3 1997
FAYETTEVILL E
REG. (WAGE
Old. Wire Elementary Road School
5,400 GPD Nitrification Field System
Hoke County
DEH 97-52/GW97181
(Ishwar Devkota: DEM SERG Review Engineer)
ECEIVE
Nov 0 21997
FAYETWIILLE
REG, OFFICE
The Groundwater Section is in receiptof the subject application for a subsurface
nitrification wastewater treatment system to treat the wastewater generated by a proposed 600-
student elementary school in Hoke County. (see Figures 1 and 2) .
A soil assessment was performed by a soil scientist to determine the suitability of the site
for the operation of a nitrification field. The LTAR (Long Term Acceptance Rate) recommended
by the soil scientist was 0.6 gallons per square foot per day (0.08 feet per day), and was based
on soil percolation tests. This application rate, which is equal to 0.04 inches per hour, is 18%
of the lowest KsAT value measured at the site (0.22 inches per hour). The horizontal hydraulic
conductivity of the saturated zone was estimated by running slug tests (which have a reputation
of underestimating the hydraulic conductivity) at the site. The average hydraulic conductivity,
as determined by the slug tests, was 10.7 feet per day. This was applied to two very
conservative estimates 'of the water table aquifer's saturated thickness to arrive atestimated
transmissivity values of 27 feet squared per day and 54 feet squared per day. The water table
was reportedly encountered at a depth of more than 25 feet beneath the surface of the ground
when piezometers were installed at the site.
The effect of the treatment system on the water table was simulated by a consultant using
Groundwater Section
P.O. Box 29578, Raleigh, North Carolina 27626-0578
2728 Capital Blvd., Raleigh, North Carolina 27604
Voice 919/733-3221 FAX [phone]
An Equal Opportunity/Affirmative Action Employer
50% recycled/ 10% post -consumer paper

f.
the Colorado State. University groundwater program CSUPAWE 3.0. Using the lower
transmissivity value, the program indicated a maximum mounding height of less than ten feet
after one thousand days of continuous application at a rate of 0.0298 feet, per day onto an area
measuring 100 feet by 250 feet. The treatment system was also . modeled by the Groundwater
Section using the CSUPAWE model and a slightly reduced application rate (to adjust for less
treatment activity on weekends) . The results from this simulation were similar to those found
by the consultant. A second method for estimating the height of the mound, based on a recent
paper by Swamee and Ojha in the Journal of Irrigation and Drainage Engineering, was used to
simulate the height of the groundwater mound after 1000 days of continuous application. This
method also estimated a maximum height of less than ten feet. Since .the elevation of the water
table is reportedly more than 25 feet below the ground surface, mounding would not be expected
to be a concern 'at this site, based on these figures.
The Groundwater Section has reviewed the subject permit application and recommends issuance
of the permit with the following conditions:
1. Any groundwater quality monitoring, as deemed necessary by the Division, shall be provided.
2. The COMPLIANCE BOUNDARY for the disposal system is specified by regulations in 15A
NCAC 2L, Groundwater Classifications and Standards. The Compliance Boundary is for the
disposal system individually permitted after December 31, 1983 is established at either(1) 250
feet from the waste disposal area, or (2) 50 feet within the property boundary, whichever is
closest to the waste disposal area. For a subsurface disposal system, the Compliance
Boundary is established at the property boundary. An exceedance of Groundwater Quality
Standards at or beyond the Compliance Boundary is subject to immediate remediation action
in addition to the penalty provisions applicable under General Statute 143-215.6A(a) (1) .
In accordance with 15A NCAC 2L, a REVIEW BOUNDARY is established around the
disposal systems midway between the Compliance Boundary and the. perimeter of the waste
disposal area. Any exceedance of standards at the Review Boundary shall require remediation
action on the part of the permittee.
3. The annualadministering and compliance fee must be paid by the Permittee within thirty (30)
days after being billed by .the Division. Failure to pay the fee accordingly may cause the
Division to initiate action to revoke this permit as specified .by 15 NCAC 2H.0205(c) (4) .
If there are any questions please let me know.
cc: • Art Barnhardt
Permit Files
--OLDWIRER--

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SCALE IN FEET `' .\ \? 1' .
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I" \ (--: v FIGURE 1
\ �`, OLD WIRE ROAD ELEMENTARY SCHOOL
,_��_,, 5,400 GPD NITRIFICATION FIELD
I \ HOKE COUNTY ,
•' \ \ DEH 97-52/GW97181
\— =J \1� SITE LOCATION MAP
•

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ALIGNMENT DATA' -"
`� • 100' WAGE LANE 71 NOM1
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•
ADDITION OF TURN AND MERGE f"
CONTRACTOR SHALL COOR0IATE
NCDOT.
DRIERS:DNSFORDRIVEWAYSARE.:~.
THE FACE OF CURBIN CURBED
RADIUS DIMENSIONS FOR CURBS: .:
FINAL BURD0IG. DRIVE. PARICIG
APPROVED BY ME ARCHITECT P .
REMOVAL OF TREES. OUTSIDE MI.
APPROVED BY ME ARCHITECT.
ME SIZE AND LOCATION OF 021
PROVIDED FOR REFERENCE C•1LY
•
ME LOCATION OF ME SAMTART
ONLY. ME DISPOSAL SKEW ; r
LIE LOCATION OF TITE PROPO.E
CONTRACTOR SHALL AOJUST10t.
ADA AND LEGAL OISCLAIMFR:
1HI5 DOCUMENT 15 INTENDED T
OF ME AMERICANS 10TN 015A81.•
ARCHITECTS AND ENGINEERS Or
LAMS OR GIVE ADVICE CONCERN
IH.P*a`EP 5 r OCULIENff x.1.rMT RC'J�:20D •
•
PP::PENCES;
STE SURVEY PROVIDED BY
MEDIA. LEWID 0. 5TROME
000000D. NORM CAROUNA
SURVEY CONFUTED APRIL
CONTRACTOR SHALL REFER
CONTROL PLAN FOR AODI00
BUILDING PLAN FRONDE° B'
ARCHITECTS VIA ELECTRONIC.
REFER TO PDC DRAYANGS P
CONCEIVING WATER AND SE
REFER TO POC DRAYANG M-
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GE=ER TO PDC °RAMNG E-
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FIGURE 2(
OLD WIRE ROAD ELEMENTARY
5,400 GPD NITRIFICATION
HOKE COUNTY
DEH 97-52/GW97181
SITE DETAIL MAP
SCHOOL
FIELD

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Application for Improvement Permit
Old Wire Road School Site
Old Wire Road
Hoke County, North Carolina
Prepared For:
COPY
Lk-2f`05
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RECEIVED
Hoke County Board of Education C Cytf VeitaWITER
310 Wooley Street SFCT10fi
Raeford, North Carolina
September 24, 1997
Prepared By:
Haggett Engineering Associates, Inc.
P.O. Box 15104 •
Wilmington, NC 28408
t�alIetna,r►�
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_ SEAL
17202
•
Project Number 97-1009

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Haggett Engineering Associates, Inc.
September 26, 1997
Mr. Steven Berkowitz, P.E.
NCDEHNR
On -Site Wastewater Section
2728 Capital Boulevard
Raleigh, North Carolina 27611
Subject: Old Wire Road School Site
Stonewall Township, Hoke County, North Carolina
Application for Improvement Permit
HEA Project Nos. 97-1009
Dear Mr. Berkowitz:
Haggett Engineering Associates, Inc.. (HEA) is submitting the enclosed Application for Improvement
Permit on behalf of the Hoke County Board of Education.
In accordance with guidance document we have provided four copies to your office and one copy to Mr.
Jeff Eudy of the. Hoke County Health Department. We would appreciate your review of the
documentation to insure that we have provided sufficient information to issue the Improvement Permit
and confirmation of the proposed flow rate. Mr. Robbie Ferris indicated that the plumbing drawings have
already been provided to your office for use in reviewing the flow rate. Once we have confirmation of the
flow rate we can complete the engineering drawings required to obtain the Authorization to Construct.
As we discussed previously Hoke County would like to have a brief (30 minutes) meeting to answer any
questions you may have on the application. We thought Friday morning (October 3rd) at 10:30 am would
be anappropriate time for this meeting. Please letus know if you think this would be beneficial and if
this is an acceptable meeting time.
We appreciate your assistance in the design and permitting of this system.
If you have anyquestions please do not hesitate to contact us at [phone].
Sincerely, .
Haggett Engineering Associates, Inc.
Sharon F. Haggett, P.E.
President
Douglas N. Haggett, P.E.
Senior Engineer
1
71009LT3.DOC
P.O. Box 15104 • Wilmington, North Carolina 28408 • 910-397-0808

:Old Wire Road School Site Improvement Permit Application
HEA Project. 97-1009 September 24, 1997
TABLE OF CONTENTS
PROJECT SUMMARY 1
NARRATIVE ? 3
SOIL SCIENTIST REPORT 4
HYDROGEOLOGIST REPORT 10
Figure 1:
Figure 2:
Figure 3:
Figure 4:
Drawing C-1:
Drawing C-2:
Appendix A:
Appendix B:
Appendix C:
Appendix D:
c
FIGURES
Topographic Location Map
Vicinity Map
Soil & Hydrogeological Investigation Map
Preliminary Nitrification Field Layout
DRAWINGS
Existing Site Layout
Proposed Site Plan
APPENDICES
Well ConstructionRecords
Geologic Cross -Sections
Supporting Calculations (system components)
Sewage Pump Information

Old Wire Road School Site improvement Permit Application
HEA Project 97-1009
September 24, 1997 •
Project Title:
Location:
Status:
Water Supply:
Surface Waters:
Facilities:
Sources:
-System:
Phasing:
Ownership:
Operator:
Project Summary
Old Wire Road School Site
Old Wire Road (SR 1105) at Arabia Road (SR 1003)
Stonewall Township
Hoke County
New System
County water main located in ROW of. Old Wire Road.
Unnamed tributary of Rockfish Creek located .1,100 feet to south.
600 student elementary school, no gymnasium provided.
See plumbing drawings provided by Progressive. Design Collaborative.
(Plumbing fixtures are of the low flow design.)
Location of the proposed system is shown on drawing C-2. A
• preliminary arrangement is provided in Figure No. 4. This
arrangement is based on a 9 gallon/day/student flow and is comprised
of H-20 infiltrator units. The field will be dosed 4 times per day using a
pressure manifold. To further enhance the nitrification process the
sump will be sizedso that the dosing can be spread over a 6 day
period. Dosing of the field will also be alternated from one side to the
other. Components in the system will include a grease trap, septic
tank, and the sump with 2 pumps to be located near the service
entrance. Thislocation was chosen for ease of access for service
vehicles. The pumps will be operated in the standard lead -lag mode
with an alternating relay to insure equal operational time. Phase Toss
protection will be provided. An audible alarm and strobe will be
provided to indicate high levels in the sump.
The proposed system will be installed prior to opening of the school in
the fall of 1998. According to Hoke County the initial flow will be
provided by approximately 400 students.
Hoke County Board' of Education
Deed Book 370, Page 869 June 20, 1997
Hoke County Board of Education
Page 1

Old Wire Road School Site Improvement Permit Application
HEA Project 97-1009 September 24, 1997
Narrative
Project Description
This project consist of the construction of a 600 student elementary school including a bus
drive and parking area, employee parking area, and entrance drive. A. nitrification field will
be constructed to the southeast of the school as indicated on drawing C-2.
Site Description
The property comprises 44 acres of which approximately 40% has been previously cleared
for farming. (refer to drawing C-1) Pine trees rangingfrom 12" to 14" in diameter cover the
remaining 60% of the property. Access to the property is .currently obtained through an old
logging road located .across Old Wire Road from the Sandy Grove church. Based on` the
sandy surface 'soils, undefined roadside ditches, and small storm drainpipe under Old Wire
Road it appears that stormwater run-off is not typically a problem. The northeast corner of
the site is located near the intersection of Old Wire Road (SR 1105) and Arabia Road (SR
1003) [see Vicinity Map]. To the east, towards Dundarrach, the property contains
approximately; 742 feet of frontage on Old wire Road. The southern property line borders
an unnamed tributary of Rockfish Creek. Groundwater at the site has been observed at a
depth of 30 to 31 feet below ground surface and flows towards the unnamed tributary to
the south.
Area Land Use
The property is located in a rural setting with adjacent parcels used primarily for agricultural
activities with some residential use. Areas surrounding the site consist of farm fields and
pine forest with some hardwood species represented.
Soils
The dominant soil at the site is Wagram loamy sand, 0 to 6 percent slopes.(WaB). This is
a well drained soil that is .found on broad, smooth flats and the side slopes of uplands. The
slope 'of the site is 2 percent or less. Typically, the surface layer is a grayish brown loamy
sand that is 8-inches thick. The subsurface soil layer is pale brown loamy sand that is 17-'
inches thick. The subsoil to a depth of at least 72 inches is a yellowish brown sandy clay
loam. . The permeability of the surface and subsurface soils is rapid (6.0 to 20 inches/hour).
The permeability of the subsoil is moderate (0.60 to 2.0 inches/hour). Erodibility is low with
a K value of 0.15 for the surface and subsurface soils (0 to 24 inches) and 0.20 for the
subsoil (24 to 72 inches). On -site permeability measurements _range, from 0.22 to 3.14
in/hr. However, based on a review of the site by Mr. Jeff Eudy, Mr. David McCloy, and Mr. Bill Dunlop the_application rate of 0.55 gale/day has been selected.
•
Page 2

Old Wire Road School Site
HE.A Project 97-1009
Regional Geoloay
This site is located in the Coastal "Plain physiographic province of the State. of North
Carolina and is believed to be underlain by the Tuscaloosa':formation of Cretaceous Age.
This formation, in the general area, is estimated to be '200'- to 250' thick and rests
unconformably on basement rock.
.i Site Specific Geoloay
Improvement Permit Application
September 24, 1997
The data . obtained from the 9 soil borings shows that the " lithology, on a comparable
footage_ basis, varies to some extent from boreholeto. borehole. However, the cross -
sections (A -A" & B-B") tend to show a thin upper silty fine sand which is' underlain by a
clayey silt and clayey fine sand (12'-18' .thick) which 'in turn is underlain mainly by fine sand
(10'-14' thick) to the bottom of the boreholes.
The static water'evels in the 5 boreholes which showed evidence of groundwater ranged
from 28.94', to 31.25' below land surface.
Based on the available data there was no discernible evidence of "perched" water in the
boreholes at this site. Well yields would probably be less than 1 gallon per minute the
vicinity of the boreholes.
The approximate groundwater flow direction at the site was determined to be generally to
the south-southeast towards an unnamed tributary of Rockfish Creek. This flow direction- is
based on the observed static water levels, relative geographic position of the piezometers,
the elevation of the land surface and the distance between the piezometers.
Figure 3 illustrates the area of the investigation including borehole locations, hand auger
locations,"and approximate groundwater flow.
Site Specific Hydrogeoloay
Results of "slug-in"test conducted on -site indicate a hydraulic conductivity of approximately
3.8 x 10-3 cm/sec for the underlying soils this would correspond to a velocity of 34.9 ft/yr.
Using this data,two different. mounding"models were run to determine the mounting'if a flow
of 5,400 gpd were applied to the investigation area of 25,000 ft2. The results of the models
indicate mounding ranging from 4.8 to 8.1 feet above, static water levels. Given that the
depth to groundwater is approximately 29' below land surface this should not present a
problem for the proposed .system.. .'
Page 3

EASTERN SOILS LIMITED
Post Office Box 10161
Wilmington, North Carolina 28405
TeVFax: (91p) S86-986S
Consulting Environmental Scientists
September 23, 1997
Mr. Douglas N. Haggett, P.E.
Haggett Engineering Associates, Inc.
P.O. Box 15104
Wilmington, North Carolina 28408
SUBJECT: On -Site Wastewater. System Site Soils
Old Wire Road School Project, Hoke county, NC
Haggett Engineering Project No. 97,-1009 -
Eastern Soils Project No. 97-108
Dear Mr. Haggett:
As part of the process of making application for an on -site wastewater system permit for the
proposed Old Wire Road School site in Hoke County, North Carolina, we conducted a soil and
site assessment for the proposed system location. Soil observations were made and permeability
testing was conducted as part of the project.,
Based on our observations and our experience with similar projects, it is our opinion that the
location proposed for the domestic wastewater system is well suited. The soils are deep, well
drained, and permeability is good. The water table is deep and surface water runoff is apparently
low. We are of the opinion that, with good system design and carefiil operation/maintenance, the
-proposed use of a soil -based wastewater treatment system will be successful.
Thank you for the opportunity to a-ssist you with this project. Call if you have any questions.
Sincerely,
6o,e
44,
W.R. Dunlop, Jr., LSS
' NC Licensed Soil Scientist #1095•

On -Site Wastewater System Site Soils
Old Wire Road School
Hoke County, NC
Introduction
A 600 student elementary school is planned by the Hoke County Board of Education for a
44-acre site that is adjacent to and south of Old Wire Road (SR 1405) near the community
of Sandy Grove in Hoke County, North Carolina. The property is former agricultural land
and pine forest land. The school building site and wastewater system site are to be located
on the former agricultural land. `
Published Soils Information
A detailed soil survey of Hoke County was conducted bythe USDA Soil Conservation
Service (USDA-SCS), now the Natural Resources Conservation Service (NRCS), in
cooperation with state and local agencies. A report of the survey findings, entitled Soil
Survey of Cumberland and Hoke Counties, North Carolina, was published in October,
1984. The survey soil scientists identified Wagram soils as the dominant soil on the
proposed wastewater system site. A brief description of the Wagrarn series, taken from
the soil survey report, is presented below:
Wagram loamy sand (WaB)- Loamy, siliceous,'thermic Arenic Paleudults
The Wagram series consists of well drained soils that formed in loamy sediment on
uplands. These soils are found :on broad, smooth flats and side slopes on uplands.
Slopes range from 0 to 6 percent for the mapping unit associated with the subject
site.
Typically, the surface soil layer is grayish brown loamy sand about 8 inches thick.
The subsurface soil layer, to a depth of about 17 inches, is pale brown loamy sand.`
The subsoil, to a depth of 72 inches, is yellowish brown sandy clay loam.
The SCS reports that the permeability of the surface soil (0 to 25 in) is rapid (6.0
to 20 in/hr).. Subsoil permeability is moderate (0.6 to 2.0 in/hr). There is no
flooding associated with this soil and the seasonal high water table is found at a
depth greater than 6 feet.
Field Verification
Bill Dunlop, a licensed soil scientist, advanced hand auger borings in a number of locations
in the former agricultural field to assess soil conditions on the site: Five borings were
made within the area proposed for the wastewater nitrification field (see Figure 3,
EASTERN SOILS LIMITED P.O. Box 10161 Wilmington, NC 28405

Old Wire Road School
2
Improvement Permit Application) to observe and record soil profile characteristics. The
boreholes were advanced to a depth of about 84 inches. Copies of the field descriptions
are attached for reference.
The soils observed on the subject site closely resembled the typical Wagram soil as
described in the soil survey report. However, the surface and subsurface soils differed
slightly in .color. They were brown rather than gray or grayish brown. The apparent long
use of the site for agriculture may have caused , a loss of organic matter in the soilresulting
in a lighter soil color. The color and texture of the subsoil fit within the range described
for the typical Wagram profile found in Hoke County.
The surface soil was observed to be brown loamy sand about 8 inches thick. The
subsurface soil, to a depth of about 20 inches was also brown loamy sand. Two of the
pedons'exhibited a yellowish brown -color in the subsurface soil layer. A hard, well
developed plow pan was found at the depth interval of 10 to 15 inches below the ground
surface. The subsoil to the depth of boring was primarily -yellowish brown and strong
brown sandy clay loam. Two of the pedons exhibited an upper subsoil layer of sandy
-loam. Gray mottles were observed no shallower than 66 inches depth. No free water was
found in any of the boreholes and the soil was dry to a depth of nearly 30 inches at the
time of this study. Site slopes are less than 2% and surface water runoff is low.
A field inspection of the proposed wastewater system site was conducted on September
12, 1997 with Mr. David McCloy, Regional Soil" Scientist. and Mr. Jeff Eudy, Hoke
County Health Department. Five soil borings were made to a depth of about:60 inches in
the vicinity of the soil borings madefor this study. A. single hand auger boring was made
in the center of the repair area designated for the -wastewater system. It was the opinion
of Mssrs. McCloy and Eudy that the soils are suitable for the treatment and disposal of
domestic wastewater. Mr. McCloy proposed an application rate of 0.55 gal/ft2/day.
Long Term Acceptance Rate (LTAR)
The subsoil of the subject site is a sandy clay loam, which is a Class III soil. The LTAR
allowed for a Class III soil is 0.3 to 0.6 gal/ft2/day. Based ;on our observations of the
subsoil and the five permeability measurements made on the site, we believe that the soil is
easily capable of accepting a wastewater loading of 0.6 gal/ft2/day. The permeability
measurements were made with a Compact Constant Head Permeameter ("Amoozemeter")
in the subsoil at a depth of 36 inches below the ground surface. The KsATS measured
ranged from 0.22 to .3.14 in/hr. (Table 1). The proposed wastewater loading rate (0.6
gal/ft2/day) is approximately 18% of the lowest permeability rate measured, when based
on a 24-hour day.
1
EASTERN SOILS LIMITED P.O. Box .10161 Wilmington, NC 28405
i

Old Wire Road School
3
Table 1. Subsoil KsAT Measurements
Borehole No, Ksat (in/hr;
HA-1 _ 2.62
HA-2 0.22
HA-3 0.26
HA-4 1.75
HA-5 3.14
The wide variation in the results of the permeability testing is probably the result of a
combination of factors. These include method limitations and, possibly, soil compaction
resulting from the agricultural use of the site.
System Design Considerations
The soils on the proposed wastewater system site are well suited for the treatment and
disposal of domestic wastewater. The depth of the nitrification field trenches should be on
the order of 24 inches to take advantage of the sandy, very permeable upper soil horizons.
The plow pan zone should be avoided. Pressure dosing is recommended to permit even
application of wastewater in the field. Flow equalization and multiple dosing episodes
should be considered to allow for the most efficient use of the soil and to' preserve its
permeability. Care should be exercised to remove grease from the wastewater stream that
originates in the cafeteria. The operation and maintenance of the wastewater system is of
paramount importance. Poor operator practices will result- in poor system -performance.
_C
EASTERN SOILS LIMITED P.O. Box 10161 Wilmington, NC 28405

SOIL PROFILE DATA SHEET
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EASTERN SOILS LIMITED
Post Office Boz.10161
Wilmington, North .Carolina 28405
Tel/Fax: [phone]
Consulting Environmental Scientists
September 24; '1997
'Mr. Douglas N. Haggett, P.E.
Haggett Engineering Associates, Inc.
P.O. Box 15104
Wilmington, North Carolina 28408
.SUBJECT: Nitrogen Impact Resulting From On -site WastewaterSystem
Old Wire Road School Project, Hoke County, NC
Haggett Engineering Project No. 97-1009
Eastern Soils Project No. 97-108
Dear Mr. Haggett:
I understand that a question has arisen about the potential forgroundwater impact as a result of
operating -an on -site wastewater system on the subject site. The constituent of concern is nitrogen
(N). It is my opinion.that groundwater impact on the site will be minimal and off -site impact will
be non-existent. Mr. Ken Pohlig, Groundwater Section (Raleigh office) and I spoke on the
telephone yesterday (September 23, 1997) about the subject of groundwater impact. It was also
his opinion that, based on the characteristics of the site, N impact potential is minimal if not nil.
Our opinions are based on site soil characteristics, depth to groundwater, groundwater flow
direction, and relative isolation of the site with respect to potential receptors.
foil Characteristics
The Wagram series is the dominant soil on the proposed wastewater system site. This is a deep,
well drained soil that has a thick (20 in) loamy sand surface soil and a sandy clay loam subsoil.
Biological activity in soils of this type is high. Nitrogen may be biologically removed by several
processes in soils. Organic N may be physically held within the soil where it is biologically
converted to chemical forms (NH4N and NO3/NO2N) through nitrification. The.ammonium form
of N (NH4N) has positive charge and is held by the soil where it is converted to nitrate and or
nitrite nitrogen (NO3/NO2N).. The nitrate and nitrite forms of N are converted to gaseous N
forms through denitrification The introduction of wastewater into the soil in multiple daily doses
encourages denitrification by alternating aerobic and anaerobic conditions in the soil.

RP
1V1I. vouglas IN. Haggett, P.E.
Page 2
, to.11
r I •
Depth to Groundwater
Piezometers installed by 'Environmental Geohydrological Consultants, Inc. (EHC) at the site
•
found that the current depth to groundwater is >25 feet. Groundwater mounding analyses
conducted for this project by Paula Hunt, P.G: indicates that a mound produced by the
introduction 4Wastewater into the soil system at the anticipated:rate-of flOw will be on the order
of 8 feet. All of this seems to show that percolating wastewater Will have ample oppOrtunity for
treatment prior to joining the site groundwater.
Groundwater Flow Direction
EHC analyzed giroundWater flow direction for the wastewater system site. They found that
groundwater flow is dominantly to the south-southeast (see Figure 3 of the permit package).
There are no known water wells that are downgradient from the wastewater system site. The
nearest potential receptor is an unnamed tributary to Rockfish Creek (see Figure 1 of the permit
package) that is approximately 1100 feet from the system site. Again, the distance of the point of
introduction ofthe wastewater into the soil from' any potential receptor allows ample opportunity
for treatment.
The site seems to be nearly ideal for the operation of a soil -based domestic wastewater treatment
system. Again, it is my opinion that gioundwater iinPact by N introduced into the environment by
the proposed wastewater system will be insignificant.
Thank you for the opportunity to assist you with this project. Call if you have any questions.
Sincerely,
W.R. Dunlop, Jr, LSS
NC Licensed Soil Scientist #1095
EASTERN SOILS LIMITED P.O. Box 10161. Wilmington, NC 28405

MN
GN
6'
107 MILLS
107'
20 MILS
217
DIM GRID AND 1970 MAGNETIC NORTH
DECLINATION AT CENTER OF SHEET
HOKE COUNTY BOARD OF EDUCATION
OLD WIRE ROAD SCHOOL SITE
OLD WIRE ROAD
HOKE COUNTY, NORTH CAROLINA
TOPOGRAPHIC LOCATION MAP
2000
/
/ _
AP IC 8e'
0 1000
2000 4000
(IN FEET)
1 inch = 2000 feet
• HAGGETT ENGINEERING ASSOCIATES, INC.
5849 SOUTH COLLEGE ROAD
WILMINGTON, NORTH CAROLINA 28412
PHONE: [phone]
DRAWN: D. HAGGETT
DFT CHECK: DNH
DATE:
SCALE:
ENG CHECK: SFH
JOB: 97-1009
APPROVAL:
FILE: 7100901
REFERENCES: USGS PARKTON, NC QUADRANGLE; 1982
FIG. NO.: 1
IN
31!

LL
L
L
L
L
L
,1
107 MILLS
1 07'
20 MILS
UTM GRID AND 1970 MAGNETIC NORTH
DECUNATION AT CENTER OF SHEET
0 RAP 1000 2000 4000
(IN FEET)
1 inch = 2000 feet
HAGGETT ENGINEERING ASSOCIATES, INC.
5849 SOUTH COLLEGE ROAD
WILMINGTON, NORTH CAROLINA 28412
PHONE: [phone]
IP
HOKE COUNTY BOARD OF EDUCATION
OLD WIRE ROAD SCHOOL SITE
OLD WIRE ROAD
HOKE COUNTY, NORTH CAROLINA
TOPOGRAPHIC LOCATION MAP
-
•'
DRAWN: D. HAGGETT
DATE: 15SEP97
DFT CHECK: DNH
SCALE: AS SHOWN
ENG CHECK: SFH
JOB: 97-1009
APPROVAL:
FILE: 7100901
REFERENCES: USGS PARKTON, NC QUADRANGLE; 1982
FIG. NO.: 1

•
(,Lal.d NI)
9-
HAGGETT ENGINEERING ASSOCIATES, INC.
5849 SOUTH COLLEGE ROAD
WILMINGTON, NORTH CAROLINA 28412
PHONE: [phone].
PROPOSED SCHOOL
Z.V. Pate. Inc.
"Faircloth Place"
D.B. 67, Pg. 483
HOKE COUNTY BOARD OF EDUCATION
OLD WIRE ROAD SCHOOL
OLD WIRE ROAD
HOKE COUNTY, NORTH CAROLINA
LARGE SUBSURFACE WASTEWATER SYSTEM •
"SOIL & HYDROGEOLOGICAL INVESTIGATION MAP
x
® SB 1
P1
®HA 1
LEGEND
SOIL BORING LOCATION
PIEZOMETER LOCATION
HAND AUGER LOCATION
FENCE LINE
PROPERTY LINE
GRAPHIC SCALE
60 0 30 60
120
(IN FEET)
I inch = 60 feet
DRAWN: D. HAGGETT
DATE: SEPTEMBER 5, 1997
DFT CHECK: DNH
SCALE: AS SHOWN
ENG CHECK: SFH
JOB: 97-1009
APPROVAL:
REFERENCES: SURVEY BY STROTHER LAND SURVEYING, GROUNDWATER FLOW BY EHC
FILE: 7100903
FIGURE NO.:
3

REFERENCES:
(W5nyb One
Ta. enar�
how. Foie
Inc.
Place"
'g. 483
edge Of pmmn.nl
SITE SURVEY PROVIDED BY STROTHER LAND SURVEYING VIA ELEC:
MEDIA. LELAND D. STROTHER, R.L.S., 120 EAST ELWOOD AVE.,
RAEFORD, NORTH CAROLINA 28376
SURVEY COMPLETED APRIL 21-25, 1997
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0
GRAPHIC SCALE
100 0 50 100
(IN FEET)
1 inch = 100 feet

p
?EN FIELD
0
\\ 9'
Lorry A, Woodcox
D.B. 171, Pg. 638
Margaret T. Hickson \
D.B. 302, Pg. 305
Enois T. Lemmons
D.B. .163, Pg. 19
N 02'40'24" E 230.55' /1 N 02'34'31" E 472.98'
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----------105 - --------
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Z.V. Pate, Inc.
"Faircloth Place'
D.B. 67, Pg. 483
.1 pavement
( bee Row)
pp. p1 ppreme•
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HAGGETT ENGINEERING ASSOCIATES, INC.
5849 SOUTH COLLEGE ROAD
WILMINGTON, NORTH CAROLINA. 28412
PHONE: '[phone]'
pG�ncin.
DATE
1OSEP97
HOKE COUNTY
OLD WIRE F
HOKE COUN1
EX
PROJECT NO.: 97-1009
DESIGN: DOUG HAGGETT
CHECKED