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PRELIMINARY SITE ASSESSMENT
DESCRIPTION: NC 42 AT NC 96 ROUNDABOUT
TIP NO: W-5704S
WBS: 44850.1.19
NCDOT PARCEL NO: 01
OWNER: RAYMOND E EARP JR. FAMILY TRUST
LOCATION: 7534 NC HWY 42, SELMA, JOHNSTON COUNTY, NC
NCPIN: 261900-14-7863
PREPARED FOR:
NORTH CAROLINA DEPARTMENT OF TRANSPORTATION
GEOTECHNICAL ENGINEERING UNIT
1020 BIRCH RIDGE DRIVE
RALEIGH, NC 27610
PREPARED BY:
FALCON ENGINEERING, INC.
1210 TRINITY ROAD, SUITE 110
CARY, NC 27513
PROJECT NUMBER: G21044.00
OCTOBER 12, 2021
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FALCON ENGINEERING, INC. / 1210 TRINITY ROAD, SUITE 110 CARY, NC 27513 / P: 919-871-0800 / WWW.FALCONENGINEERS.COM
October 12, 2021
Mr. Craig Haden
Geoenvironmental Project Manager
Geotechnical Engineering Unit
North Carolina Department of Transportation
1020 Birch Ridge Drive
Raleigh, NC 27610
Re: Preliminary Site Assessment
Description: NC 42 at NC 96 Roundabout
TIP No: W-5704S
WBS: 44850.1.19
NCDOT Parcel No: 01
Owner: Raymond E Earp Jr. Family Trust
Location: 7534 Nc Hwy 42, Selma, Johnston County, NC
NCPIN: 261900-14-7863
Mr. Haden:
Falcon is pleased to present the following Preliminary Site Assessment in support of the above-mentioned
Project. Specifically, Falcon sampled soil around two probable Under Ground Storage Tanks (USTs), a suspect
dispenser island, and in the vicinity of proposed excavations for drainage features on this parcel in general
accordance with the approved scope of work. Soils requiring remediation or special handling during
construction were not identified. However, some minor residual petroleum hydrocarbons remain onsite.
Falcon recommends if residual petroleum hydrocarbons, USTs, above ground storage tanks, drums, petroleum
odors or sheen are observed during any excavation associated with any property involved in the project that all
work in the vicinity stop until further assessment takes place. Further assessment can include but is not limited
to; sampling the soil and groundwater, excavation, and proper handling and disposal of contaminated soils and
groundwater.
Please review this report and advise us if you have any questions or concerns. We appreciate this opportunity
to provide services to you and look forward to partnering with you on future projects. If you have any questions,
please give Falcon a call at (919) 871-0800.
Sincerely,
FALCON ENGINEERING, INC.
Christopher J. Burkhardt Robert Lane, PG Jeremy R. Hamm, PE Environmental Services Manager Project Geologist Geotechnical Services Manager PROJECT:REFERENCE:AT TIME OF INVESTIGATION
SEE SHEET 3 FOR PLAN SHEET LAYOUT
CHECKED BY
SUBMITTED BY
DATE
INVESTIGATED BY
DRAWN BY
PERSONNEL
EVANS, T. E.
EVANS, T. E.
EVANS, T. E.
FALCON ENG.
CAUTION NOTICE
THE SITE DIFFERING FROM THOSE INDICATED IN THE SUBSURFACE INFORMATION.
EXTENSION OF TIME FOR ANY REASON RESULTING FROM THE ACTUAL CONDITIONS ENCOUNTERED AT
PROJECT. THE CONTRACTOR SHALL HAVE NO CLAIM FOR ADDITIONAL COMPENSATION OR FOR AN
AS HE DEEMS NECESSARY TO SATISFY HIMSELF AS TO CONDITIONS TO BE ENCOUNTERED ON THE
THE BIDDER OR CONTRACTOR IS CAUTIONED TO MAKE SUCH INDEPENDENT SUBSURFACE INVESTIGATIONS
OPINION OF THE DEPARTMENT AS TO THE TYPE OF MATERIALS AND CONDITIONS TO BE ENCOUNTERED.
SUFFICIENCY OR ACCURACY OF THE INVESTIGATION MADE, NOR THE INTERPRETATIONS MADE, OR
DESIGN INFORMATION ON THIS PROJECT. THE DEPARTMENT DOES NOT WARRANT OR GUARANTEE THE
AND CONSTRUCTION PURPOSES, REFER TO THE CONSTRUCTION PLANS AND DOCUMENTS FOR FINAL
PRELIMINARY ONLY AND IN MANY CASES THE FINAL DESIGN DETAILS ARE DIFFERENT. FOR BIDDING
THE BIDDER OR CONTRACTOR IS CAUTIONED THAT DETAILS SHOWN ON THE SUBSURFACE PLANS ARE
INCLUDING TEMPERATURES, PRECIPITATION AND WIND, AS WELL AS OTHER NON-CLIMATIC FACTORS.
SOIL MOISTURE CONDITIONS MAY VARY CONSIDERABLY WITH TIME ACCORDING TO CLIMATIC CONDITIONS
INVESTIGATIONS ARE AS RECORDED AT THE TIME OF THE INVESTIGATION. THESE WATER LEVELS OR
THE OBSERVED WATER LEVELS OR SOIL MOISTURE CONDITIONS INDICATED IN THE SUBSURFACE
CAN BE RELIED ON ONLY TO THE DEGREE OF RELIABILITY INHERENT IN THE STANDARD TEST METHOD.
WITHIN THE BOREHOLE. THE LABORATORY SAMPLE DATA AND THE IN SITU (IN-PLACE) TEST DATA
REFLECT THE ACTUAL SUBSURFACE CONDITIONS BETWEEN BORINGS OR BETWEEN SAMPLED STRATA
GEOTECHNICAL INTERPRETATION OF ALL AVAILABLE SUBSURFACE DATA AND MAY NOT NECESSARILY
GENERAL SOIL AND ROCK STRATA DESCRIPTIONS AND INDICATED BOUNDARIES ARE BASED ON A
BORING LOGS, ROCK CORES AND SOIL TEST DATA ARE NOT PART OF THE CONTRACT.
GEOTECHNICAL ENGINEERING UNIT AT (919) 707-6850. THE SUBSURFACE PLANS AND REPORTS, FIELD
BE REVIEWED OR INSPECTED IN RALEIGH BY CONTACTING THE N. C. DEPARTMENT OF TRANSPORTATION,
PURPOSES. THE VARIOUS FIELD BORING LOGS, ROCK CORES AND SOIL TEST DATA AVAILABLE MAY
MADE FOR THE PURPOSE OF STUDY, PLANNING AND DESIGN, AND NOT FOR CONSTRUCTION OR PAY
THE SUBSURFACE INFORMATION AND THE SUBSURFACE INVESTIGATION ON WHICH IT IS BASED WERE
CONTENTS
COUNTY
PROJECT DESCRIPTION
STATE OF NORTH CAROLINA
DEPARTMENT OF TRANSPORTATION
DIVISION OF HIGHWAYS
GEOTECHNICAL ENGINEERING UNIT
SUBSURFACE INVESTIGATION
ROADWAY
LINESTATIONPLANPROFILE
CONDITIONS INDICATED HEREIN AND THE ACTUAL CONDITIONS AT THE PROJECT SITE.
FOR INCREASED COMPENSATION OR EXTENSION OF TIME BASED ON DIFFERENCES BETWEEN THE
BY HAVING REQUESTED THIS INFORMATION, THE CONTRACTOR SPECIFICALLY WAIVES ANY CLAIMS2.
OR CONTRACT FOR THE PROJECT.
OF TRANSPORTATION AS ACCURATE NOR IS IT CONSIDERED PART OF THE PLANS, SPECIFICATIONS
THE INFORMATION CONTAINED HEREIN IS NOT IMPLIED OR GUARANTEED BY THE N. C. DEPARTMENT1.
NOTES:
DATESIGNATURE
1
STATE PROJECT REFERENCE NO.STATE NO.
SHEET
SHEETS
TOTAL
N.C.B-5301
PITT
REPLACE BRIDGE NO. 87 OVER
NORFOLK SOUTHERN RAILROAD ON NC 33B-530146015
HAMM, J. R.
MID ATLANTIC DRILLING
-L-13+00 - 35+604-5
-DR1-
-DR2-
-DR3-
6
7
7
7
4
4
5
10+16.94 - 14+68.41
11+09.81 - 19+66.26
10+00 - 15+65
CROSS SECTIONS
LINESTATIONSHEETS
-L-
APPENDICES
APPENDIXTITLESHEETS
A
INVENTORY
23
14+00 - 32+505-14
-DR1-17+50 - 19+5015
CPT LOGS16-23
SEPTEMBER 2015
MMAH .R YME
REJ
039779PROFESSIONALE
NGINEER
N ORTH CARO
LINA
SEAL
10/18/2021
PRELIMINARY SITE ASSESSMENT
NCDOT / W-5704S PARCEL NO. 01 / G21044.00 / OCTOBER 12, 2021 3
TABLE OF CONTENTS
SECTION 1: INTRODUCTION ........................................................................................ 5
1.1 DESCRIPTION ....................................................................................................... 5
1.2 SCOPE OF WORK ................................................................................................. 5
SECTION 2: HISTORY ................................................................................................... 5
2.1 PARCEL USAGE .................................................................................................... 5
2.2 FACILITY IDENTIFICATION NUMBER ................................................................. 5
2.3 GROUNDWATER INCIDENT NUMBER ................................................................ 5
SECTION 3: SITE OBSERVATIONS .............................................................................. 6
3.1 GROUNDWATER MONITORING WELLS ............................................................. 6
3.2 ACTIVE USTS ........................................................................................................ 6
3.3 FEATURES APPARENT BEYOND ROW/EASEMENT ......................................... 6
SECTION 4: METHODOLOGY ....................................................................................... 7
4.1 GEOPHYSICS ....................................................................................................... 7
4.2 BORINGS ............................................................................................................... 7
4.3 SAMPLE PROTOCOL ........................................................................................... 7
SECTION 5: RESULTS ................................................................................................... 9
5.1 GEOPHYSICS ....................................................................................................... 9
5.2 SAMPLE DATA ...................................................................................................... 9
TABLE NO. 1 BORING COORDINATES .................................................................................. 9
TABLE NO. 2 PID READINGS ............................................................................................... 10
TABLE NO. 3 SUMMARY OF UVF SOIL SAMPLING RESULTS ........................................... 11
5.3 SAMPLE OBSERVATIONS ................................................................................. 11
5.4 QUANTITIES CALCULATIONS ........................................................................... 11
SECTION 6: CONCLUSIONS ....................................................................................... 12
6.1 INTERPRETATION OF RESULTS ...................................................................... 12
6.2 GEOPHYSICS ..................................................................................................... 12
6.3 SAMPLING ........................................................................................................... 12
6.4 QUANTITIES ........................................................................................................ 12
SECTION 7: RECOMMENDATIONS ............................................................................ 12
7.1 ADDITIONAL SAMPLING .................................................................................... 12
7.2 SPECIAL HANDLING OF IMPACTED SOIL ....................................................... 12
PRELIMINARY SITE ASSESSMENT
NCDOT / W-5704S PARCEL NO. 01 / G21044.00 / OCTOBER 12, 2021 4
LIST OF FIGURES AND ATTACHMENTS
VICINITY MAP
USGS TOPOGRAPHIC MAP
AERIAL PHOTOGRAPHS
GEOPHYSICAL SURVEY RESULTS
BORING LOCATION MAP
BORING LOGS
SITE PHOTOGRAPHS
LABORATORY RESULTS
GEOPHYSICAL SURVEY REPORT
PRELIMINARY SITE ASSESSMENT
NCDOT / W-5704S PARCEL NO. 01 / G21044.00 / OCTOBER 12, 2021 5
SECTION 1: INTRODUCTION
1.1 DESCRIPTION
Falcon Engineering, Inc. (Falcon) completed a Preliminary Site Assessment of NCDOT TIP Project W-5704S
Parcel No. 01. on September 27, 2021. Parcel 01 is Owned by the Raymond E Earp Jr. Trust and is addressed
as 7959 NC 42 in Selma, Johnston County, North Carolina. North Carolina Parcel Identification Number
(NCPIN) 261900-14-7863 corresponds to this parcel. NCDOT is proposing to construct a roundabout at this
intersection. The limits of the assessment are between the existing edge of NCDOT maintained pavement
(within the existing NCDOT ROW) where accessible, and the proposed NCDOT ROW and/or easement
(whichever boundary represents the largest area)..
1.2 SCOPE OF WORK
Falcon’s scope of work included coordination of; public and private utility location near the proposed borings,
geophysical surveys, collecting soil samples with a geoprobe, and laboratory analysis. Samples were analyzed
for petroleum via UVF technology.
SECTION 2: HISTORY
2.1 PARCEL USAGE
Falcon performed a GeoEnvironmental Planning Report for W-5704S under Project No. G19018 dated June
2019. The GeoEnvironmental Planning Report identified Parcel No. 1 as a Site of Concern based on the parcel’s
suspected history as a gas station. A long oval concrete island with suspect dispenser fittings and a suspect fill
pipe were observed on-site. Parcel No. 1 is also at the intersection of two highways.
2.2 FACILITY IDENTIFICATION NUMBER
A Facility Identification Number was not identified for this parcel.
2.3 GROUNDWATER INCIDENT NUMBER
A Groundwater Incident Number was not identified for this parcel.
PRELIMINARY SITE ASSESSMENT
NCDOT / W-5704S PARCEL NO. 01 / G21044.00 / OCTOBER 12, 2021 6
SECTION 3: SITE OBSERVATIONS
3.1 GROUNDWATER MONITORING WELLS
Groundwater monitoring wells (MWs) were not observed on this parcel.
3.2 ACTIVE USTS
Active underground Storage Tanks (USTs) were not observed within the project limits or registered at this
parcel. Suspect dispenser fittings and a suspect fill pipe were observed on-site. Two probable USTs and product
lines were identified through geophysical technology.
3.3 FEATURES APPARENT BEYOND ROW/EASEMENT
Monitoring wells, remediation systems, hydraulic lifts, or additional USTs were not observed during our site
visit.
PRELIMINARY SITE ASSESSMENT
NCDOT / W-5704S PARCEL NO. 01 / G21044.00 / OCTOBER 12, 2021 7
SECTION 4: METHODOLOGY
4.1 GEOPHYSICS
Pyramid Geophysical Services (Pyramid) was subcontracted to perform a geophysical survey of the assessment
area. The assessment area is between the existing edge of NCDOT maintained pavement (within the existing
NCDOT ROW) where accessible, and the proposed NCDOT ROW and/or easement (whichever boundary
represents the largest area). The survey was used to locate private utility lines, as well as possible indications of
USTs and/or their pits.
The geophysical investigation consisted of electromagnetic (EM) induction-metal detection and ground
penetrating radar (GPR) surveys. Pyramid collected the EM data using a Geonics EM61-MK2 (EM61) metal
detector integrated with a Geode External GPS/GLONASS receiver. The integrated GPS system allows the
location of the instrument to be recorded in real-time during data collection, resulting in an EM data set that is
georeferenced and can be overlain on aerial photographs and CADD drawings.
The GPR data was acquired across select EM anomalies (where identified), using a Geophysical Survey Systems,
Inc. (GSSI) UtilityScan DF unit equipped with a dual frequency 300/800 MHz antenna. Pyramid marked their
findings on the surface with paint. A boundary grid was established around the perimeter of the site with marks
every 10 feet to maintain orientation of the instrument throughout the survey and to obtain adequate coverage.
A copy of the full Geophysical Report is included in the Attachments.
4.2 BORINGS
Regional Probing was subcontracted to advance soil borings using direct push technology. Regional Probing
used a truck mounted Geoprobe® 5410 unit mounted on an off-road modified Ford F350 Diesel 4x4. The unit
has auger capabilities and is equipped with a GH-42 soil-probing hammer, with 21,700 pounds of down force
and 28,900 pounds of retraction force. The unit has an on-board tank for decontaminating the geoprobe rods
before advancing the probe at each sample location.
4.3 SAMPLE PROTOCOL
Prior to initiating sample collection Falcon contacted NC One Call and requested public utility locations be
marked around the proposed sample locations. Sampling was performed in general accordance with the NC
Department of Environmental Quality (DEQ) Division of Waste Management’s (DWM) “Guidelines for Site
Checks, Tank Closure, and Initial Response and Abatement for UST Releases” (March 1, 2007 Version Change
9 – February 1, 2019) guidance document. Sampling strategy was derived based upon the project scope and
objectives as outlined above. Red Lab, LLC was selected to perform the UVF laboratory analytical analysis.
Appropriate sterile containers were received by Falcon from Red Lab prior to beginning the fieldwork. The
containers were labeled appropriately.
PRELIMINARY SITE ASSESSMENT
NCDOT / W-5704S PARCEL NO. 01 / G21044.00 / OCTOBER 12, 2021 8
A Minirae 3000 photoionization detector (PID) was used to field screen samples for volatile organics to
determine if a release had occurred. The instrument was calibrated per manufacturer instructions prior to use.
Falcon staff bagged composite soil samples of each boring in approximately two-foot sections. Representative
samples were placed in a sealed plastic bag for approximately 10 minutes to allow soil hydrocarbons to reach
equilibrium within the headspace prior to scanning with the PID. One sample per boring was collected from
the depth of the proposed cut or from the section above the depth of cut with the highest PID reading.
To avoid cross contamination, a new unused pair of non-powdered nitrile gloves was worn while extracting
each sample. Samples were placed in the appropriate laboratory provided containers. The labels on each
container were then completed so that each provided the date and time of sampling, method of analysis, sample
collector, preservative used and sampling location identification. Samples were placed in an ice filled cooler and
transported to the lab. Appropriate chain-of-custody procedures, including the completion of necessary forms,
were followed.
PRELIMINARY SITE ASSESSMENT
NCDOT / W-5704S PARCEL NO. 01 / G21044.00 / OCTOBER 12, 2021 9
SECTION 5: RESULTS
5.1 GEOPHYSICS
The geophysical investigation was performed on September 13, 2021 to determine if unknown, metallic
underground storage tanks (USTs) were present beneath the survey area. A total of seven EM anomalies were
identified. Most of the EM anomalies were directly attributed to visible cultural features at the ground surface.
One large EM feature was characteristic of buried structures such as USTs. GPR was performed across the
significant unknown buried metal anomaly.
Two probable USTs were identified at the location of the significant metallic anomaly. Both probable USTs
were approximately 8 feet long and 4 feet wide. Reconnaissance GPR also identified a suspected former product
line extending from the two probable USTs to the former pump island. No evidence of additional buried
structures such as USTs was observed.
5.2 SAMPLE DATA
Falcon and our subcontractor advanced nine (9) borings (P1S1 through P1S9). Four (4) borings were advanced
to approximately ten (10) feet below ground surface (BGS) around the probable USTs. Five (5) borings were
advanced to approximately five (5) feet BGS. Three (3) of those borings were located near drainage features
and two (2) were near the assumed locations of former dispensers on the pump island. Groundwater was
observed at 9.9 feet BGS in one boring, P1S3 near the probable USTs. Please see Figure 3 in the attachments
for a visual depiction of the sample locations. The coordinates (latitude and longitude) that correspond to the
sample locations are shown below in Table No. 1 Boring Coordinates.
TABLE NO. 1 BORING COORDINATES
Boring Latitude Longitude
P1S1 35.6624295 -78.2800800
P1S2 35.6624293 -78.2800451
P1S3 35.6623972 -78.2800485
P1S4 35.6624019 -78.2800838
P1S5 35.6625200 -78.2800815
P1S6 35.6623141 -78.2801084
P1S7 35.6622850 -78.2801305
P1S8 35.6621778 -78.2805022
P1S9 35.6625131 -78.2799556
PRELIMINARY SITE ASSESSMENT
NCDOT / W-5704S PARCEL NO. 01 / G21044.00 / OCTOBER 12, 2021 10
Borings were field screened with a PID in approximately two-foot sections for evidence of volatile organics.
The PID screening results are presented in Table No. 2 PID Readings. Falcon selected soil samples based on
the field screening results and the needs of the project. Red Lab analyzed the selected samples and their full
analytical report is attached. The results of the laboratory analysis are shown in Table No. 3 Summary of UVF
Soil Sampling Results.
Petroleum hydrocarbons above State Action Levels were not detected in the samples.
TABLE NO. 2 PID READINGS
Boring Depth BGS* PID**
P1S1
0-2 0.0
2-4 0.0
4-6 0.0
6-8 0.0
8-11 0.0
P1S2
0-2 0.0
2-4 0.0
4-6 0.4
6-8 0.0
8-10 0.0
P1S3
0-2 0.0
2-4 0.0
4-6 0.0
6-8 0.0
8-10 24.4
P1S4
0-2 0.0
2-4 0.0
4-6 0.0
6-8 0.0
8-10 0.0
P1S5 0-2.5 3.1
2.5-5 0.0
P1S6 0-2.5 0.0
2.5-5 0.4
P1S7 0-2.5 5.0
2.5-5 6.2
P1S8 0-2.5 5.4
2.5-5 0.0
P1S9 0-2.5 1.5
2.5-5 0.0
*BGS = Depth below ground surface in feet
**PID readings are in parts per million
Sample depths shown in bold were selected for analysis
PRELIMINARY SITE ASSESSMENT
NCDOT / W-5704S PARCEL NO. 01 / G21044.00 / OCTOBER 12, 2021 11
TABLE NO. 3 SUMMARY OF UVF SOIL SAMPLING RESULTS
Sample ID BTEX (C6 - C9)
GRO (C5 - C10)
DRO (C10 - C35)
TPH (C5 - C35)
Total Aromatics (C10-C35)
16 EPA PAHs BaP
Ratios HC Fingerprint Match % light % mid % heavy
P1S1 <0.89 1.8 35.8 37.6 18.7 0.91 <0.036 8.4 72.7 18.9
V.Deg.PHC 77.7%,(FCM), (BO)
P1S2 <0.63 <0.63 26.9 26.9 13 1.4 0.034 0 83.5 16.5 Road Tar 91.6%,(FCM), (BO)
P1S3 <0.73 3.7 20.3 24 12.8 0.66 <0.029 32.2 58.7 9.1 Deg.Fuel 76.7%,(FCM)
P1S4 <0.36 <0.36 <0.36 0.22 0.22 <0.11 <0.014 0 74.5 25.5 Residual HC
P1S5 <0.83 <0.83 41.7 41.7 36.2 1.8 <0.033 0 88.2 11.8 Deg Fuel 89.5%,(FCM)
P1S6 <0.36 <0.36 0.36 0.36 0.19 <0.11 <0.014 0 79.1 20.9 Deg Fuel 76.6%,(FCM)
P1S7 <0.78 <0.78 23.3 23.3 17.7 0.94 <0.031 0 89.2 10.8 Deg Fuel 90.6%,(FCM)
P1S8 <0.37 <0.37 <0.37 0.21 0.21 <0.12 <0.015 0 76.4 23.6 Residual HC
P1S9 <0.75 <0.75 12.6 12.6 6.4 0.32 <0.03 8.8 69.8 21.4 V.Deg.PHC 90%,(FCM)
Results reported in mg/kg (milligrams per kilogram)
5.3 SAMPLE OBSERVATIONS
Visual indications of a release (stained soils, odors, or oily sheen) were not observed. Soil Samples were obtained
from the borings and visually-manually classified in general accordance with the American Association of State
Highway and Transportation Officials (AASHTO) soil classification system. Detailed boring logs are included
in the Appendix of this report.
5.4 QUANTITIES CALCULATIONS
Soils requiring quantity calculations were not identified.
PRELIMINARY SITE ASSESSMENT
NCDOT / W-5704S PARCEL NO. 01 / G21044.00 / OCTOBER 12, 2021 12
SECTION 6: CONCLUSIONS
6.1 INTERPRETATION OF RESULTS
This Preliminary Site Assessment was performed to evaluate the soils in proximity to the project limits on this
parcel for the presence of petroleum hydrocarbons. The findings are as follows:
Soil sampling completed on the parcel did not identify contaminants in the soil at levels requiring
remediation.
6.2 GEOPHYSICS
The Geophysics report identified two (2) probable USTs and their product lines within the project limits on
this parcel.
6.3 SAMPLING
Sampling results did not identify contaminants in the soil which require remediation in the areas sampled. Based
on past project experience, Falcon does not anticipate soil remediation or special handling and disposal will be
required during construction on this parcel.
6.4 QUANTITIES
Soils requiring quantities calculations were not identified.
SECTION 7: RECOMMENDATIONS
7.1 ADDITIONAL SAMPLING
Contaminants above the Industrial / Commercial Soil Cleanup Levels were not identified; therefore, additional
assessment is not warranted at this time. However, some minor residual petroleum hydrocarbons remain onsite.
Falcon recommends if residual petroleum hydrocarbons, drums, USTs, above ground storage tanks (ASTs),
petroleum odors or sheen are observed during any excavation associated with any property involved in the
project that all work in the vicinity stop until further assessment takes place. Further assessment can include
but is not limited to; sampling the soil and groundwater, excavation, and proper handling and disposal of
contaminated soils and groundwater.
7.2 SPECIAL HANDLING OF IMPACTED SOIL
Soils requiring special handling were not identified. If suspect contaminated soils or soils impacted with
petroleum hydrocarbons are encountered during construction Falcon and the NCDOT GeoEnvironmental
Group should be contacted for proper handling instructions.
NC 42 AT NC 96 ROUNDABOUT
PRELIMINARY SITE ASSESSMENT
TIP NO:W-5704S WBS:44850.1.19
SELMA, JOHNSTON COUNTY
VICINITY MAP
Project No.:G21044.00Date: October 2021Source:Google Maps
STUDY AREA
NC 42 AT NC 96 ROUNDABOUT
PRELIMINARY SITE ASSESSMENT
TIP NO:W-5704S WBS:44850.1.19
USGS “FLOWERS, NC” 2019 TOPOGRAPHIC MAP
Project No.:G21044.00Date: October 2021Source: USGS Topoview website https://ngmdb.usgs.gov/topoview/
STUDY
AREA
NC 42 AT NC 96 ROUNDABOUT
PRELIMINARY SITE ASSESSMENT
TIP NO:W-5704S WBS:44850.1.19
2018 AERIAL PHOTOGRAPH
Project No.:G21044.00Date: October 2021Source:Google Earth
NC 42 AT NC 96 ROUNDABOUT
PRELIMINARY SITE ASSESSMENT
TIP NO:W-5704S WBS:44850.1.19
2008 AERIAL PHOTOGRAPH
Project No.:G21044.00Date: October 2021Source:Google Earth
NC 42 AT NC 96 ROUNDABOUT
PRELIMINARY SITE ASSESSMENT
TIP NO:W-5704S WBS:44850.1.19
2006 AERIAL PHOTOGRAPH
Project No.:G21044.00Date: October 2021Source:Google Earth
NC 42 AT NC 96 ROUNDABOUT
PRELIMINARY SITE ASSESSMENT
TIP NO:W-5704S WBS:44850.1.19
1993 AERIAL PHOTOGRAPH
Project No.:G21044.00Date: October 2021Source:Google Earth
NC 42 AT NC 96 ROUNDABOUTPRELIMINARY SITE ASSESSMENTTIP NO:W-5704SWBS:44850.1.19GEOPHYSICAL RESULTS PROVIDED BY: PYRAMID GEOPHYSICAL SERVICES
REMOVE
15" RCP-IV
EST. 7 SY GFEST. 2 TONSCL B RIPRAP
EST. 7 SY GFEST. 2 TONSCL B RIPRAP
DAYLIGHT DITCH
EST. 7 SY GFEST. 2 TONSCL B RIPRAP
EST. 7 SY GFEST. 2 TONSCL B RIPRAP
SEE DETAIL 1SPEC. LAT. V-DITCH
EST. 5 SY GFEST. 1 TONSCL 'B' RIPRAP
EST. 5 SY GFEST. 1 TONCL 'B' RIPRAP
BENCHFLOODPLAIN
BENCHFLOODPLAIN
24" RCP-IV
24" RCP-IV
EST. 210 SY GFEST. 120 TONSSEE DETAIL 3
SPEC. LAT. V-DITCH W/ CL 'B' RIPRAP
15" RCP-IV
15" RCP-IV
15" RCP-IV
15" RCP-IV
15" RCP-IV
24" RCP-IV
18" RCP-IV
18" RCP-IV
18" RCP-IV
SILL
ELEV. 225.71STA 11+27.36 -RAB-CREST
CB
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0404
0406
0407
CB
CB
TB 2GI
0408
0409
0405
CB
0414
0415
0413
0411
0416
0417
0418
0419
0422
0423
INV=223.9TOP=228.6
INV=224.1TOP=228.4
INV=223.6
INV=224.2
INV=221.8TOP=225.0 INV=220.9
INV=218.1TOP=222.1
INV=219.2TOP=223.2
INV=218.5TOP=221.7
INV=219.8
INV=217.4
ELEV. 226.1FS TO
INV=221.5TOP=223.8
INV=221.1
MDCB
MDCB
INV=219.3TOP=221.6
INV=219.0
INV=218.4TOP=221.7
INV=218.2
0425042418" RCP-IV 18" RCP-IV
TB 2GI
0426 0428
CBCB0427
0429INV=215.8 INV=215.4INV=217.3TOP=220.5
INV=217.3TOP=220.5
INV=229.4TOP=233.1
CB INV=229.5
BL-103
S S
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GUY
GUY
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SFOM
GUY
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GUY
GUYGUY
GUY
GUYSS S
SSSSSSSS18" RCPINV=218.04'
INV=217.47'
FOM
PT
N 09°06'31" E210.00'N 88°37'47" E
179.68'
WOODS
WOODS
ANN B BOUGHMANVANCE WADE BOUGHMAN
DB 1371 PG 178
MARY E MOORE WORLEY
RAYMOND E EARP JR FAMILY TRUST
DB 4576 PG 279MARY E MOORE WORLEY
RAYMOND E EARP JR FAMILY TRUST
TO R/WEPK .63'
ECM 24' WIDE ROADWAYNC 96CONC
CONC
BST
BST
4'WWF4'WWF TC
HH
TC THHWCMWCM15151
2 NAD 83/ NSRS 2007NOTES:
0 120
FEET
60
RALEIGH, NC 27607
1210 TRINITY ROAD, SUITE 110
FALCON ENGINEERING, INC.
PHONE: 919.871.0800
BORING LOCATION PLAN
P1S6
P1S9
P1S4 P1S3
P1S2P1S1
P1S8
P1S1 - DEPTH = 10.0'
P1S2 - DEPTH = 10.0'
P1S3 - DEPTH = 10.0'
P1S5
P1S7
TWO PROBABLE USTs
P1S4 - DEPTH = 10.0'
P1S5 - DEPTH = 5.0'
P1S6 - DEPTH = 5.0'
P1S7 - DEPTH = 5.0'
P1S8 - DEPTH = 5.0'
P1S9 - DEPTH = 5.0'
GROBORING DRO
1.8 35.8
26.9
3.7 20.3
41.7
0.36
23.3
0.37
12.6
8.0-11.0
DEPTH (FT)
P1S1
P1S2
P1S3
P1S4
P1S5
P1S6
P1S7
P1S8
P1S9
4.0-6.0
8.0-10.0
8.0-10.0
0.0-2.5
2.5-5.0
2.5-5.0
0.0-2.5
0.0-2.5
<0.36
<0.36
<0.83
<0.36
<0.78
<0.37
<0.75
<0.36
FALCON PROJECT NO.: G21044.00
WBS: 44850.1.19 | TIP: W-5704S
JOHNSTON COUNTY, NORTH CAROLINA
NC 42 at NC 96 ROUNDABOUT
F
F
F
C
C
F
C
C
C
C
C
C
C
C
C
C
C
C
C
F
0.0
4.4
5.2
5.8
6.6
7.8
11.0
ROADWAY EMBANKMENT
Tan, Sandy Clay (A-6)
Orange, Clayey Gravel (A-1-a)
Orange, Sandy Clay (A-6)
Orange, Clayey Gravel (A-1-a)
Orange, Sandy Clay (A-6)
RESIDUALTan, Sandy Silt (A-4)
Boring Terminated at Depth 11.0 ft inResidual
PID RESULTS:0-2': 0.02-4': 0.04-6': 0.06-8': 0.08-11': 0.0
*SAMPLE IN BOLD WAS SELECTED FOR
ANALYSIS
SHEET 1 OF 9
DRIVEELEV(ft)
DEPTH(ft)DEPTH (ft)
SOIL AND ROCK DESCRIPTION
L
O
G
SAMP.
NO.MOI ELEV. (ft)
BLOW COUNT
0.5ft 0.5ft0.5ft
BLOWS PER FOOT
25 50 750 100
BORE LOG
OFFSET N/A ALIGNMENT N/A
EASTING 2,213,841
N/A
N/A
SITE DESCRIPTION NC 42 at 96 Construct Roundabout
BORING NO.P1S1
GROUND WTR (ft)
TOTAL DEPTH 11.0 ft
SURFACE WATER DEPTH N/ACOMP. DATE 09/27/21START DATE 09/27/21
GEOLOGIST Lane, R.
STATION N/A
COLLAR ELEV.N/A
0 HR.
24 HR.NORTHING 696,798
DRILLER Contract Driller
DRILL RIG/HAMMER EFF./DATE 5410 Truck DRILL METHOD Direct Push HAMMER TYPE Automatic
TIP W-5704SWBS44850.1.19 COUNTY JOHNSTON
ELEV(ft)
GEOTECHNICAL BORING REPORT
NCDOT BORE SINGLE W5704S_PSA_LOGS.GPJ NC_DOT.GDT 10/11/21GROUND SURFACE
0.0
4.4
5.6
7.0
10.0
ROADWAY EMBANKMENT
Tan, Sandy Clay (A-6)
Tan and Black, Clayey Gravel (A-1-a)
Tan, Sandy Clay (A-6) with trace gravel
RESIDUALTan and White, Sandy Silt (A-4)
Boring Terminated at Depth 10.0 ft in
Residual
PID RESULTS:0-2': 0.02-4': 0.04-6': 0.46-8': 0.0
8-10': 0.0
*SAMPLE IN BOLD WAS SELECTED FORANALYSIS
SHEET 2 OF 9
DRIVEELEV(ft)
DEPTH(ft)DEPTH (ft)
SOIL AND ROCK DESCRIPTION
L
O
G
SAMP.
NO.MOI ELEV. (ft)
BLOW COUNT
0.5ft 0.5ft0.5ft
BLOWS PER FOOT
25 50 750 100
BORE LOG
OFFSET N/A ALIGNMENT N/A
EASTING 2,213,852
N/A
N/A
SITE DESCRIPTION NC 42 at 96 Construct Roundabout
BORING NO.P1S2
GROUND WTR (ft)
TOTAL DEPTH 10.0 ft
SURFACE WATER DEPTH N/ACOMP. DATE 09/27/21START DATE 09/27/21
GEOLOGIST Lane, R.
STATION N/A
COLLAR ELEV.N/A
0 HR.
24 HR.NORTHING 696,798
DRILLER Contract Driller
DRILL RIG/HAMMER EFF./DATE 5410 Truck DRILL METHOD Direct Push HAMMER TYPE Automatic
TIP W-5704SWBS44850.1.19 COUNTY JOHNSTON
ELEV(ft)
GEOTECHNICAL BORING REPORT
NCDOT BORE SINGLE W5704S_PSA_LOGS.GPJ NC_DOT.GDT 10/11/21GROUND SURFACE
0.0
2.1
8.5
10.0
ROADWAY EMBANKMENT
Tan, Sandy Clay (A-6)
RESIDUALTan and Gray, Sandy Clay (A-6)
Tan and Gray, Silt (A-4)
Boring Terminated at Depth 10.0 ft in
Residual
PID RESULTS:0-2': 0.02-4': 0.04-6': 0.06-8': 0.0
8-10': 24.4
*SAMPLE IN BOLD WAS SELECTED FORANALYSIS
SHEET 3 OF 9
DRIVEELEV(ft)
DEPTH(ft)DEPTH (ft)
SOIL AND ROCK DESCRIPTION
L
O
G
SAMP.
NO.MOI ELEV. (ft)
BLOW COUNT
0.5ft 0.5ft0.5ft
BLOWS PER FOOT
25 50 750 100
BORE LOG
OFFSET N/A ALIGNMENT N/A
EASTING 2,213,851
N/A
N/A
SITE DESCRIPTION NC 42 at 96 Construct Roundabout
BORING NO.P1S3
GROUND WTR (ft)
TOTAL DEPTH 10.0 ft
SURFACE WATER DEPTH N/ACOMP. DATE 09/27/21START DATE 09/27/21
GEOLOGIST Lane, R.
STATION N/A
COLLAR ELEV.N/A
0 HR.
24 HR.NORTHING 696,786
DRILLER Contract Driller
DRILL RIG/HAMMER EFF./DATE 5410 Truck DRILL METHOD Direct Push HAMMER TYPE Automatic
TIP W-5704SWBS44850.1.19 COUNTY JOHNSTON
ELEV(ft)
GEOTECHNICAL BORING REPORT
NCDOT BORE SINGLE W5704S_PSA_LOGS.GPJ NC_DOT.GDT 10/11/21GROUND SURFACE
0.0
4.4
10.0
ROADWAY EMBANKMENT
Tan and Gray, Sandy Clay (CL) with tracegravel
RESIDUALTan and Gray, Sandy Silt (ML)
Boring Terminated at Depth 10.0 ft in
Residual
PID RESULTS:0-2': 0.02-4': 0.04-6': 0.06-8': 0.0
8-10': 0.0
*SAMPLE IN BOLD WAS SELECTED FORANALYSIS
SHEET 4 OF 9
DRIVEELEV(ft)
DEPTH(ft)DEPTH (ft)
SOIL AND ROCK DESCRIPTION
L
O
G
SAMP.
NO.MOI ELEV. (ft)
BLOW COUNT
0.5ft 0.5ft0.5ft
BLOWS PER FOOT
25 50 750 100
BORE LOG
OFFSET N/A ALIGNMENT N/A
EASTING 2,213,840
N/A
N/A
SITE DESCRIPTION NC 42 at 96 Construct Roundabout
BORING NO.P1S4
GROUND WTR (ft)
TOTAL DEPTH 10.0 ft
SURFACE WATER DEPTH N/ACOMP. DATE 09/27/21START DATE 09/27/21
GEOLOGIST Lane, R.
STATION N/A
COLLAR ELEV.N/A
0 HR.
24 HR.NORTHING 696,788
DRILLER Contract Driller
DRILL RIG/HAMMER EFF./DATE 5410 Truck DRILL METHOD Direct Push HAMMER TYPE Automatic
TIP W-5704SWBS44850.1.19 COUNTY JOHNSTON
ELEV(ft)
GEOTECHNICAL BORING REPORT
NCDOT BORE SINGLE W5704S_PSA_LOGS.GPJ NC_DOT.GDT 10/11/21GROUND SURFACE
0.0
0.4
2.5
5.0
Asphalt (5")
ROADWAY EMBANKMENT
Brown, Silty Sand (A-2-4) with gravel
Tan, Sandy Clay (A-6)
Boring Terminated at Depth 5.0 ft in
Roadway Embankment
PID RESULTS:0-2.5': 3.12.5-5': 0.0
*SAMPLE IN BOLD WAS SELECTED FOR
ANALYSIS
SHEET 5 OF 9
DRIVEELEV(ft)
DEPTH(ft)DEPTH (ft)
SOIL AND ROCK DESCRIPTION
L
O
G
SAMP.
NO.MOI ELEV. (ft)
BLOW COUNT
0.5ft 0.5ft0.5ft
BLOWS PER FOOT
25 50 750 100
BORE LOG
OFFSET N/A ALIGNMENT N/A
EASTING 2,213,841
N/A
N/A
SITE DESCRIPTION NC 42 at 96 Construct Roundabout
BORING NO.P1S5
GROUND WTR (ft)
TOTAL DEPTH 5.0 ft
SURFACE WATER DEPTH N/ACOMP. DATE 09/27/21START DATE 09/27/21
GEOLOGIST Lane, R.
STATION N/A
COLLAR ELEV.N/A
0 HR.
24 HR.NORTHING 696,761
DRILLER Contract Driller
DRILL RIG/HAMMER EFF./DATE 5410 Truck DRILL METHOD Direct Push HAMMER TYPE Automatic
TIP W-5704SWBS44850.1.19 COUNTY JOHNSTON
ELEV(ft)
GEOTECHNICAL BORING REPORT
NCDOT BORE SINGLE W5704S_PSA_LOGS.GPJ NC_DOT.GDT 10/11/21PAVEMENT SURFACE
0.0
0.6
5.0
Asphalt (7")
ROADWAY EMBANKMENT
Orange, Sandy Clay (A-6) with trace gravel
Boring Terminated at Depth 5.0 ft in
Roadway Embankment
PID RESULTS:0-2.5': 0.02.5-5': 0.4
*SAMPLE IN BOLD WAS SELECTED FOR
ANALYSIS
SHEET 6 OF 9
DRIVEELEV(ft)
DEPTH(ft)DEPTH (ft)
SOIL AND ROCK DESCRIPTION
L
O
G
SAMP.
NO.MOI ELEV. (ft)
BLOW COUNT
0.5ft 0.5ft0.5ft
BLOWS PER FOOT
25 50 750 100
BORE LOG
OFFSET N/A ALIGNMENT N/A
EASTING 2,213,833
N/A
N/A
SITE DESCRIPTION NC 42 at 96 Construct Roundabout
BORING NO.P1S6
GROUND WTR (ft)
TOTAL DEPTH 5.0 ft
SURFACE WATER DEPTH N/ACOMP. DATE 09/27/21START DATE 09/27/21
GEOLOGIST Lane, R.
STATION N/A
COLLAR ELEV.N/A
0 HR.
24 HR.NORTHING 696,756
DRILLER Contract Driller
DRILL RIG/HAMMER EFF./DATE 5410 Truck DRILL METHOD Direct Push HAMMER TYPE Automatic
TIP W-5704SWBS44850.1.19 COUNTY JOHNSTON
ELEV(ft)
GEOTECHNICAL BORING REPORT
NCDOT BORE SINGLE W5704S_PSA_LOGS.GPJ NC_DOT.GDT 10/11/21PAVEMENT SURFACE
0.0
5.0
RESIDUAL
Tan and Orange, Sandy Clay (A-6)
Boring Terminated at Depth 5.0 ft in Residual
PID RESULTS:0-2.5': 5.02.5-5': 6.2
*SAMPLE IN BOLD WAS SELECTED FORANALYSIS
SHEET 7 OF 9
DRIVEELEV(ft)
DEPTH(ft)DEPTH (ft)
SOIL AND ROCK DESCRIPTION
L
O
G
SAMP.
NO.MOI ELEV. (ft)
BLOW COUNT
0.5ft 0.5ft0.5ft
BLOWS PER FOOT
25 50 750 100
BORE LOG
OFFSET N/A ALIGNMENT N/A
EASTING 2,213,827
N/A
N/A
SITE DESCRIPTION NC 42 at 96 Construct Roundabout
BORING NO.P1S7
GROUND WTR (ft)
TOTAL DEPTH 5.0 ft
SURFACE WATER DEPTH N/ACOMP. DATE 09/27/21START DATE 09/27/21
GEOLOGIST Lane, R.
STATION N/A
COLLAR ELEV.N/A
0 HR.
24 HR.NORTHING 696,745
DRILLER Contract Driller
DRILL RIG/HAMMER EFF./DATE 5410 Truck DRILL METHOD Direct Push HAMMER TYPE Automatic
TIP W-5704SWBS44850.1.19 COUNTY JOHNSTON
ELEV(ft)
GEOTECHNICAL BORING REPORT
NCDOT BORE SINGLE W5704S_PSA_LOGS.GPJ NC_DOT.GDT 10/11/21TOPSOIL (2")
0.0
5.0
RESIDUAL
Tan and Orange, Sandy Clay (A-6)
Boring Terminated at Depth 5.0 ft in Residual
PID RESULTS:0-2.5': 5.42.5-5': 0.0
*SAMPLE IN BOLD WAS SELECTED FORANALYSIS
SHEET 8 OF 9
DRIVEELEV(ft)
DEPTH(ft)DEPTH (ft)
SOIL AND ROCK DESCRIPTION
L
O
G
SAMP.
NO.MOI ELEV. (ft)
BLOW COUNT
0.5ft 0.5ft0.5ft
BLOWS PER FOOT
25 50 750 100
BORE LOG
OFFSET N/A ALIGNMENT N/A
EASTING 2,213,716
N/A
N/A
SITE DESCRIPTION NC 42 at 96 Construct Roundabout
BORING NO.P1S8
GROUND WTR (ft)
TOTAL DEPTH 5.0 ft
SURFACE WATER DEPTH N/ACOMP. DATE 09/27/21START DATE 09/27/21
GEOLOGIST Lane, R.
STATION N/A
COLLAR ELEV.N/A
0 HR.
24 HR.NORTHING 696,705
DRILLER Contract Driller
DRILL RIG/HAMMER EFF./DATE 5410 Truck DRILL METHOD Direct Push HAMMER TYPE Automatic
TIP W-5704SWBS44850.1.19 COUNTY JOHNSTON
ELEV(ft)
GEOTECHNICAL BORING REPORT
NCDOT BORE SINGLE W5704S_PSA_LOGS.GPJ NC_DOT.GDT 10/11/21TOPSOIL (2")
0.0
5.0
RESIDUAL
Red and Orange, Sandy Clay (A-6)
Boring Terminated at Depth 5.0 ft in Residual
PID RESULTS:0-2.5': 1.52.5-5': 0.0
*SAMPLE IN BOLD WAS SELECTED FORANALYSIS
SHEET 9 OF 9
DRIVEELEV(ft)
DEPTH(ft)DEPTH (ft)
SOIL AND ROCK DESCRIPTION
L
O
G
SAMP.
NO.MOI ELEV. (ft)
BLOW COUNT
0.5ft 0.5ft0.5ft
BLOWS PER FOOT
25 50 750 100
BORE LOG
OFFSET N/A ALIGNMENT N/A
EASTING 2,213,878
N/A
N/A
SITE DESCRIPTION NC 42 at 96 Construct Roundabout
BORING NO.P1S9
GROUND WTR (ft)
TOTAL DEPTH 5.0 ft
SURFACE WATER DEPTH N/ACOMP. DATE 09/27/21START DATE 09/27/21
GEOLOGIST Lane, R.
STATION N/A
COLLAR ELEV.N/A
0 HR.
24 HR.NORTHING 696,829
DRILLER Contract Driller
DRILL RIG/HAMMER EFF./DATE 5410 Truck DRILL METHOD Direct Push HAMMER TYPE Automatic
TIP W-5704SWBS44850.1.19 COUNTY JOHNSTON
ELEV(ft)
GEOTECHNICAL BORING REPORT
NCDOT BORE SINGLE W5704S_PSA_LOGS.GPJ NC_DOT.GDT 10/11/21TOPSOIL (2")
Photograph No. 1: General view of Boring No. 1.
Photograph No. 2: General view of Boring No. 2.
NC 42 AT NC 96 ROUNDABOUT
PRELIMINARY SITE ASSESSMENT
TIP NO:W-5704S WBS:44850.1.19
Site Photographs
Photograph No. 3: General view of Boring No. 3.
Photograph No. 4: General view of Boring No. 4.
NC 42 AT NC 96 ROUNDABOUT
PRELIMINARY SITE ASSESSMENT
TIP NO:W-5704S WBS:44850.1.19
Site Photographs
Photograph No. 5: General view of Boring No. 5.
Photograph No. 6: General view of Boring No. 6.
NC 42 AT NC 96 ROUNDABOUT
PRELIMINARY SITE ASSESSMENT
TIP NO:W-5704S WBS:44850.1.19
Site Photographs
Photograph No. 7: General view of Boring No. 7.
Photograph No. 8: General view of Boring No. 8.
NC 42 AT NC 96 ROUNDABOUT
PRELIMINARY SITE ASSESSMENT
TIP NO:W-5704S WBS:44850.1.19
Site Photographs
Photograph No. 9: General view of Boring No. 9.
Photograph No. 10: General view of Parcel No. 1.
NC 42 AT NC 96 ROUNDABOUT
PRELIMINARY SITE ASSESSMENT
TIP NO:W-5704S WBS:44850.1.19
Site Photographs
Hydrocarbon Analysis Results
Client:Falcon Samples taken 9/27/21
Address:1210 Trinity Dr Samples extracted 9/27/21
Cary, NC 27513 Samples analysed Tuesday, September 28, 2021
Contact:C. Bokkhardt Operator Harry Wooten
Project:G21044
9 U04049
Matrix Sample ID Dilution
used
BTEX
(C6 - C9)
GRO
(C5 - C10)
DRO
(C10 - C35)
TPH
(C5 - C35)
Total
Aromatics
(C10-C35)
16 EPA
PAHs BaP HC Fingerprint Match
% light % mid %
heavy
s P1S1 35.6 <0.89 1.8 35.8 37.6 18.7 0.91 <0.036 8.4 72.7 18.9 V.Deg.PHC 77.7%,(FCM),(BO)
s P1S2 25.4 <0.63 <0.63 26.9 26.9 13 1.4 0.034 0 83.5 16.5 Road Tar 91.6%,(FCM),(BO)
s P1S3 29.4 <0.73 3.7 20.3 24 12.8 0.66 <0.029 32.2 58.7 9.1 Deg.Fuel 76.7%,(FCM)
s P1S4 14.3 <0.36 <0.36 <0.36 0.22 0.22 <0.11 <0.014 0 74.5 25.5 Residual HC
s P1S5 33.3 <0.83 <0.83 41.7 41.7 36.2 1.8 <0.033 0 88.2 11.8 Deg Fuel 89.5%,(FCM)
s P1S6 14.3 <0.36 <0.36 0.36 0.36 0.19 <0.11 <0.014 0 79.1 20.9 Deg Fuel 76.6%,(FCM)
s P1S7 31.4 <0.78 <0.78 23.3 23.3 17.7 0.94 <0.031 0 89.2 10.8 Deg Fuel 90.6%,(FCM)
s P1S8 14.9 <0.37 <0.37 <0.37 0.21 0.21 <0.12 <0.015 0 76.4 23.6 Residual HC
s P1S9 30.2 <0.75 <0.75 12.6 12.6 6.4 0.32 <0.03 8.8 69.8 21.4 V.Deg.PHC 90%,(FCM)
Initial Calibrator QC check OK Final FCM QC Check OK 101.1 %
Results generated by a QED HC-1 analyser. Concentration values in mg/kg for soil samples and mg/L for water samples. Soil values are not corrected for moisture or stone content
Fingerprints provide a tentative hydrocarbon identification. The abbreviations are:- FCM = Results calculated using Fundamental Calibration Mode : % = confidence for sample fingerprint match to library
(SBS) or (LBS) = Site Specific or Library Background Subtraction applied to result : (PFM) = Poor Fingerprint Match : (T) = Turbid : (P) = Particulate present
Ratios
QED Hydrocarbon FingerprintsProject:G21044 Tuesday, September 28, 2021
32775
P1S1 : V.Deg.PHC 77.7%,(FCM),(BO)
28787
P1S2 : Road Tar 91.6%,(FCM),(BO)
20874
P1S3 : Deg.Fuel 76.7%,(FCM)
700
P1S4 : Residual HC
47029
P1S5 : Deg Fuel 89.5%,(FCM)
758
P1S6 : Deg Fuel 76.6%,(FCM)
30263
P1S7 : Deg Fuel 90.6%,(FCM)
700
P1S8 : Residual HC
15227
P1S9 : V.Deg.PHC 90%,(FCM)
GEOPHYSICAL SURVEY
METALLIC UST INVESTIGATION:
PARCEL 1
NCDOT PROJECT W-5704S
7959 NC HWY. 42, SELMA, NC
September 15, 2021
Report prepared for: Christopher Burkhardt, PWS
Falcon Engineering, Inc.
1210 Trinity Road, Suite 110
Raleigh, NC 27607
Prepared by: ____ ____________________________
Eric C. Cross, P.G.
NC License #2181
Reviewed by: ____ __________________________
Douglas A. Canavello, P.G.
NC License #1066
PYRAMID GEOPHYSICAL SERVICES
(PROJECT 2021-257)
503 INDUSTRIAL AVENUE, GREENSBORO, NC 27406
P: 336.335.3174 F: 336.691.0648
C257: GEOLOGY C1251: ENGINEERING
Parcel 1 – 7959 NC Hwy. 42 (NCDOT Project W-5704S)
Selma, North Carolina
GEOPHYSICAL INVESTIGATION REPORT
Parcel 1 – 7959 NC Hwy. 42
Selma, Johnston County, North Carolina
Table of Contents
Executive Summary ........................................................................................................... 1
Introduction ........................................................................................................................ 2
Field Methodology ............................................................................................................. 2
Discussion of Results ......................................................................................................... 4
Discussion of EM Results .............................................................................................. 4
Discussion of GPR Results ............................................................................................ 4
Summary & Conclusions ................................................................................................... 5
Limitations ......................................................................................................................... 5
Figures
Figure 1 – Parcel 1 - Geophysical Survey Boundaries and Site Photographs
Figure 2 – Parcel 1 - EM61 Metal Detection Results Contour Map
Figure 3 – Parcel 1 - GPR Transect Locations and Images
Figure 4 – Parcel 1 - Locations and Sizes of Two Probable USTs
Figure 5 – Overlay of Metal Detection Results and Two Probable USTs on
NCDOT Engineering Plans
LIST OF ACRONYMS
CADD ................................................Computer Assisted Drafting and Design
DF ......................................................Dual Frequency
EM......................................................Electromagnetic
GPR....................................................Ground Penetrating Radar
GPS ....................................................Global Positioning System
NCDOT..............................................North Carolina Department of Transportation
ROW ..................................................Right-of-Way
UST ....................................................Underground Storage Tank
Parcel 1 – 7959 NC Hwy. 42 (NCDOT Project W-5704S) 1 | Page
Selma, North Carolina
EXECUTIVE SUMMARY
Project Description: Pyramid Environmental (Pyramid) conducted a geophysical
investigation for Falcon Engineering, Inc. (Falcon) at Parcel 1, located at 7959 NC Hwy.
42 in Selma, NC. The survey was part of a North Carolina Department of Transportation
(NCDOT) Right-of-Way (ROW) investigation (NCDOT Project W-5704S). The survey
was designed to extend from the existing edge of pavement into the proposed ROW and/or
proposed easements, whichever distance was greater. Conducted on September 13, 2021,
the geophysical investigation was performed to determine if unknown, metallic
underground storage tanks (USTs) were present beneath the survey area.
Geophysical Results: The geophysical investigation consisted of electromagnetic (EM)
induction-metal detection and ground penetrating radar (GPR) surveys. A total of seven
EM anomalies were identified. The majority of the EM anomalies were directly attributed
to visible cultural features at the ground surface. One large EM feature was characteristic
of buried structures such as USTs. GPR was performed across the significant unknown
buried metal anomaly.
Two probable USTs were identified at the location of the significant metallic anomaly.
Both probable USTs were approximately 8 feet long and 4 feet wide. Reconnaissance GPR
also identified a suspected former product line extending from the two probable USTs to
the former pump island. No evidence of additional buried structures such as USTs was
observed. Collectively, the geophysical data recorded evidence of two probable USTs at
Parcel 1.
Parcel 1 – 7959 NC Hwy. 42 (NCDOT Project W-5704S) 2 | Page
Selma, North Carolina
INTRODUCTION
Pyramid Environmental (Pyramid) conducted a geophysical investigation for Falcon
Engineering, Inc. (Falcon) at Parcel 1, located at 7959 NC Hwy. 42 in Selma, NC. The
survey was part of a North Carolina Department of Transportation (NCDOT) Right-of-
Way (ROW) investigation (NCDOT Project W-5704S). The survey was designed to extend
from the existing edge of pavement into the proposed ROW and/or proposed easements,
whichever distance was greater. Conducted on September 13, 2021, the geophysical
investigation was performed to determine if unknown, metallic underground storage tanks
(USTs) were present beneath the survey area.
The site consisted of a former building foundation surrounded by asphalt, gravel, and grass
surfaces. An apparent former pump island was visible in front of the building foundation.
An aerial photograph showing the survey area boundaries and ground-level photographs
are shown in Figure 1.
FIELD METHODOLOGY
The geophysical investigation consisted of electromagnetic (EM) induction-metal
detection and ground penetrating radar (GPR) surveys. Pyramid collected the EM data
using a Geonics EM61-MK2 (EM61) metal detector integrated with a Geode External
GPS/GLONASS receiver. The integrated GPS system allows the location of the instrument
to be recorded in real-time during data collection, resulting in an EM data set that is geo-
referenced and can be overlain on aerial photographs and CADD drawings. A boundary
grid was established around the perimeter of the site with marks every 10 feet to maintain
orientation of the instrument throughout the survey and assure complete coverage of the
area.
According to the instrument specifications, the EM61 can detect a metal drum down to a
maximum depth of approximately 8 feet. Smaller objects (1-foot or less in size) can be
detected to a maximum depth of 4 to 5 feet. The EM61 data were digitally collected at
Parcel 1 – 7959 NC Hwy. 42 (NCDOT Project W-5704S) 3 | Page
Selma, North Carolina
approximately 0.8-foot intervals along north-south trending or east-west trending,
generally parallel survey lines, spaced five feet apart. The data were downloaded to a
computer and reviewed in the field and office using the Geonics NAV61 and Surfer for
Windows Version 15.0 software programs.
GPR data were acquired across select EM anomalies on September 13, 2021, using a
Geophysical Survey Systems, Inc. (GSSI) SIR 4000 control unit coupled to a 350 MHz HS
antenna. Data were collected both in reconnaissance fashion as well as along formal
transect lines across EM features. The GPR data were viewed in real-time using a vertical
scan of 512 samples, at a rate of 48 scans per second. GPR data were viewed down to a
maximum depth of approximately 6 feet, based on dielectric constants calculated by the
SIR 4000 unit in the field during the reconnaissance scans. GPR transects across specific
anomalies were saved to the hard drive of the DF unit for post-processing and figure
generation.
Pyramid’s classifications of USTs for the purposes of this report are based directly on the
geophysical UST ratings provided by the NCDOT. These ratings are as follows:
Parcel 1 – 7959 NC Hwy. 42 (NCDOT Project W-5704S) 4 | Page
Selma, North Carolina
DISCUSSION OF RESULTS
Discussion of EM Results
A contour plot of the EM61 results obtained across the survey area at the property is
presented in Figure 2. Each EM anomaly is numbered for reference in the figure. The
following table presents the list of EM anomalies and the cause of the metallic response, if
known:
LIST OF METALLIC ANOMALIES IDENTIFIED BY EM SURVEY
Metallic Anomaly # Cause of Anomaly Investigated with GPR
1 Utility
2 Utility
3 Former Pump Island
4 Suspected Former Product Line
5 Two Probable USTs
6 Sign
7 Signs
The majority of the EM anomalies were directly attributed to visible cultural features at the
ground surface, including utilities, the former pump island, and signs. EM Anomaly 5 was
a significant buried metallic feature that was suggestive of USTs and was investigated by
GPR. Reconnaissance GPR was also performed around the pump island and across
suspected utilities during Pyramid’s subsequent private utility locating efforts to verify this
infrastructure.
Discussion of GPR Results
Figure 3 presents the locations of the formal GPR transects performed at the property as
well as the transect images. A total of three formal GPR transects were performed at the
site. Reconnaissance GPR was also performed during the private utility locating survey.
GPR Transects 1-3 were performed across EM Anomaly 5. These transects recorded two
discreet, high-amplitude hyperbolic reflectors and two distinct lateral reflectors that were
characteristic of USTs. These features have been characterized as two probable USTs. Both
Parcel 1 – 7959 NC Hwy. 42 (NCDOT Project W-5704S) 5 | Page
Selma, North Carolina
probable USTs were approximately 8 feet long and 4 feet wide. Figure 4 provides the
locations and sizes of the two probable USTs, overlain on an aerial, along with a ground-
level photograph. Additional reconnaissance GPR indicated that EM Anomaly 4 was
associated with a suspected former product line extending from the two probable USTs to
the former pump island. No evidence of additional buried structures such as USTs was
observed.
Collectively, the geophysical data recorded evidence of two probable USTs at Parcel 1.
Figure 5 provides an overlay of the metal detection results and the two probable USTs on
the NCDOT engineering plans for reference.
SUMMARY & CONCLUSIONS
Pyramid’s evaluation of the EM61 and GPR data collected at Parcel 1 in Selma, North
Carolina, provides the following summary and conclusions:
The EM61 and GPR surveys provided reliable results for the detection of metallic
USTs within the accessible portions of the geophysical survey area.
The majority of the EM anomalies were directly attributed to visible cultural
features at the ground surface. One large EM feature was characteristic of buried
structures such as USTs. GPR was performed across the significant unknown
buried metal anomaly.
Two probable USTs were identified at the location of the significant metallic
anomaly. Both probable USTs were approximately 8 feet long and 4 feet wide.
Reconnaissance GPR also identified a suspected former product line extending
from the two probable USTs to the former pump island. No evidence of additional
buried structures such as USTs was observed.
Collectively, the geophysical data recorded evidence of two probable USTs at
Parcel 1.
Parcel 1 – 7959 NC Hwy. 42 (NCDOT Project W-5704S) 6 | Page
Selma, North Carolina
LIMITATIONS
Geophysical surveys have been performed and this report was prepared for Falcon in
accordance with generally accepted guidelines for EM61 and GPR surveys. It is generally
recognized that the results of the EM61 and GPR surveys are non-unique and may not
represent actual subsurface conditions. The EM61 and GPR results obtained for this project
have not conclusively determined the definitive presence or absence of metallic USTs, but
the evidence collected is sufficient to result in the conclusions made in this report.
Additionally, it should be understood that areas containing extensive vegetation, reinforced
concrete, or other restrictions to the accessibility of the geophysical instruments could not
be fully investigated.
TITLEPROJECT DATE
PYRAMID
PROJECT #:
CLIENT
FIGURE 1
PARCEL 1 - GEOPHYSICAL SURVEY BOUNDARIES
AND SITE PHOTOGRAPHS
PARCEL 1
SELMA, NORTH CAROLINA
NCDOT PROJECT W-5704S
9/14/2021
2021-257
503 INDUSTRIAL AVENUEGREENSBORO, NC 27406(336) 335-3174 (p) (336) 691-0648 (f) License # C1251 Eng. / License # C257 Geology
N
APPROXIMATE BOUNDARIES OF GEOPHYSICAL SURVEY AREA
View of Survey Area
(Facing Approximately Northeast)
View of Survey Area
(Facing Approximately Southwest)
FALCON
2213600 2213650 2213700 2213750 2213800 2213850 2213900 2213950
NC STATE PLANE EASTING (NAD83, FEET)
696660
696710
696760
696810
696860
696910
NC STATE PLANE NORTHING (NAD83, FEET)
TITLEPROJECT DATE
PYRAMID
PROJECT #:
CLIENT
FIGURE 2
PARCEL 1 - EM61 METAL DETECTION RESULTS
CONTOUR MAP
PARCEL 1
SELMA, NORTH CAROLINA
NCDOT PROJECT W-5704S
9/14/2021
2021-257
503 INDUSTRIAL AVENUEGREENSBORO, NC 27406(336) 335-3174 (p) (336) 691-0648 (f) License # C1251 Eng. / License # C257 Geology
N
FALCON
2213600 2213650 2213700 2213750 2213800 2213850 2213900 2213950
NC STATE PLANE EASTING (NAD83, FEET)
696660
696710
696760
696810
696860
696910
NC STATE PLANE NORTHING (NAD83, FEET)The contour plot shows the differential results of the
EM61 instrument in millivolts (mV). The differential
results focus on larger metallic objects such as USTs
and drums. The EM data were collected on September 13,
2021, using a Geonics EM61-MK2 instrument.
Verification GPR data were collected using a
GSSI SIR 4000 control unit with a 350 MHz antenna
on September 13, 2021.
EVIDENCE OF TWO PROBABLE
METALLIC USTs WAS OBSERVED.
EM61 Metal Detection Response
(millivolts)
EM61 METAL DETECTION RESULTS
-5000-400-200-100-9030405060751001502003004005007501000(1) EM RESPONSE DUE
TO UTILITY
(2) EM RESPONSE DUE
TO UTILITY
(3) EM RESPONSE DUETO FORMER PUMP ISLAND
(4) EM RESPONSE DUETO SUSPECTED FORMER
PRODUCT LINE
(5) EM RESPONSE DUETO TWO PROBABLE USTs
(6) EM RESPONSE DUE
TO SIGN
(7) EM RESPONSE DUE
TO SIGNS
TITLEPROJECT DATE
PYRAMID
PROJECT #:
CLIENT
FIGURE 3
PARCEL 1 - GPR TRANSECT LOCATIONS
AND IMAGES
PARCEL 1
SELMA, NORTH CAROLINA
NCDOT PROJECT W-5704S
9/14/2021
2021-257
503 INDUSTRIAL AVENUEGREENSBORO, NC 27406(336) 335-3174 (p) (336) 691-0648 (f) License # C1251 Eng. / License # C257 Geology
N
FALCON
2213600 2213650 2213700 2213750 2213800 2213850 2213900 2213950
NC STATE PLANE EASTING (NAD83, FEET)
696660
696710
696760
696810
696860
696910
NC STATE PLANE NORTHING (NAD83, FEET)LOCATIONS OF GPR TRANSECTS
GPR TRANSECT 1 (T1)
GPR TRANSECT 2 (T2)GPR TRANSECT 3 (T3)
T1
T2
T3
WIDTHS OF TWO
PROBABLE USTs
LENGTH OF ONEPROBABLE UST
LENGTH OF ONE
PROBABLE UST
TITLEPROJECT DATE
PYRAMID
PROJECT #:
CLIENT
FIGURE 4
PARCEL 1 - LOCATIONS AND SIZES OF
TWO PROBABLE USTs
PARCEL 1
SELMA, NORTH CAROLINA
NCDOT PROJECT W-5704S
9/14/2021
2021-257
503 INDUSTRIAL AVENUEGREENSBORO, NC 27406(336) 335-3174 (p) (336) 691-0648 (f) License # C1251 Eng. / License # C257 Geology
N
FALCON
2213600 2213650 2213700 2213750 2213800 2213850 2213900 2213950
NC STATE PLANE EASTING (NAD83, FEET)
696660
696710
696760
696810
696860
696910
NC STATE PLANE NORTHING (NAD83, FEET)LOCATIONS AND SIZES OF TWO PROBABLE USTs
PROBABLE UST#1
PROBABLE UST#2
APPROXIMATE DIMENSIONS OF TWO PROBABLE USTs
PROBABLE UST #1: 8' LONG X 4' WIDE
PROBABLE UST #2: 8' LONG X 4' WIDE
PROBABLE UST#1
PROBABLE UST#2
View of Two Probable USTs
(Facing Approximately Northwest)
DI
0404
CB
CB
TB 2GI
0408
0409
0405
CB
0414 04150413
0411
0416
0417
0418
0419
0422
ELEV. 226.1FS TO
MDCB
MDCB
0425
0424 18" RCP-IV 18" RCP-IV
TB 2GI
24" RCP-IV
24" RCP-IV
CB
15" RCP-IV
15" RCP-IV
15" RCP-IV
18" RCP-IV
18" RCP-IV
BL-103
GUY
GUY
GUYGUY
GUY
GUY
GUYGUY
GUY
GUYSS S
SSSSSSFOM
PT
N 09°06'31" E210.00'N 88°37'47" E
179.68'
WOODS
DB 4576 PG 279MARY E MOORE WORLEY
RAYMOND E EARP JR FAMILY TRUST
TO R/WEPK .63'
ECM
CONC
CONC
BST
BST TC
HH
C THH1
EXISTING ROW
EXISTING PROPERTY BOUNDARY
LEGEND
N
TITLE
PROJECT
REVISION NO. 0
License # C1251 Eng. / #C257 Geology
336.335.3174 (p) 336.691.0648 (f)
GREENSBORO, NC 27406
503 INDUSTRIAL AVENUE
PROPOSED ROW LINE
PROPOSED SS FILL LINE
TEMPORARY CONSTRUCTION EASEMENT
PROPOSED SS CUT LINE
MILLIVOLTS (mV)
PROPOSED PERMANENT UTILITY EASEMENT
0
FEET
15 30
PROBABLE UST
TWO PROBABLE USTs
ON NCDOT ENGINEERING PLANS
AND TWO PROBABLE USTs
OVERLAY OF METAL DETECTION RESULTS
NCDOT PROJECT W-5704S
SELMA, NORTH CAROLINA
PARCEL 1
DATE: 09-14-2021
PYRAMID PROJECT NO. 2021-257 FIGURE NO. 5
C
C
C
C
C
C