22025_WWAY_UST Closure Report_19940509

NATIONAL ENVIRONMENTAL TECHNOLOGIES, INC.
May 9, 1994
Mr. Charles Stehman
NCDEHNR - DIVISION OF ENVIRONMENTAL MANAGEMENT
Ground Water Section
127 Cardinal Dr. Ext.
Wilmington, NC 28405-3845
SUBJECT: Submittal of UST Closure Report
WWAY - TV3
Wilmington, North Carolina
Dear Mr. Stehman:
Project #223001
On behalf of our client, WWAY of Wilmington, NC, National Environmental Technologies
(NET) is submitting the enclosed report documenting the recent closure of one (1) 3,000 gallon
underground storage tank (UST) at the above named site.
If there are any questions, please feel free to contact me in Wilmington at [phone].
Very truly yours,
NATIONAL ENVIRONMENTAL TECHNOLOGIES
Joe Beaman
Project Manager
Enclosure
cc: Ms. Gina Teague, WWAY
301-A N. Green Meadows Drive • Wilmington, N.C. 28405 • [phone]/FAX [phone]

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CLOSURE OF AN UNDERGROUND STORAGE TANK SYSTEM
Prepared For.
WWAY TV-3
615 N. Front Street
Wilmington, NC 28402
Prepared By:
NATIONAL ENVIRONMENTAL TECHNOLOGIES
295-A North Green Meadows Drive
Wilmington, NC 28405
Project N° 223001
May 5, 1994
Bobby J. Beaman
Project Manager

TABLE OF CONTENTS
SECTION
PAGE
1.0
INTRODUCTION
1
2.0
BACKGROUND INFORMATION
2
3.0
REGIONAL HYDROGEOLOGY
3
4.0
FIELD METHODOLOGY
4
5.0
DISCUSSION AND RECOMMENDATIONS
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APPENDICES
APPENDIX A: Tables
APPENDIX B: Topographic Location Map
APPENDIX C: Site/Sampling Diagram
APPENDIX D: Site Investigation Report for Permanent Closure of
UST (Form GW/UST-2)
APPENDIX E: Liquid Disposal Manifest
APPENDIX F: Laboratory Analytical Results for Closure Samples
APPENDIX G: Photographs

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' 1.0 INTRODUCTION
' National Environmental Technologies (NET) was contracted by WWAY to provide
environmental supervision and subcontractor services for the closure of one (1) underground
storage tank (UST) system at their television studio located at 615 N. Front Street in
Wilmington, NC. On behalf of WWAY, NET filed State of North Carolina, Department of
' Environment, Health and Natural Resources, Division of Environmental Management (DEM)
Form No. GW/UST-3 for advance notification of the permanent closure of one (1) 3,000 gallon
' UST system used for the storage of gasoline. The UST system was formerly used for fueling
of company owned fleet vehicles, and was properly registered with DEM.
The system was closed by abandonment in place on April 20, 1994. Closure activities
described in this report were performed in accordance with current DEM Guidance Documents
for the Closure of Underground Storage Tanks, and Guidelines for the Investigation and
' Remediation of Soils and Groundwater.
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The results of the environmental assessment conducted by NET during tank closure activities
indicate that soil surrounding the former UST has not been adversely impacted by releases of
product from the system. Laboratory analytical results obtained from soil samples collected
during UST closure were reported as Below Detection Limit, or BDL, for total petroleum
hydrocarbons (TPH/5030). The results of sample analysis are summarized in tables included
in Appendix A.
This report details closure activities and includes data supporting our recommendation for a
"clean closure" designation from DEM.
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' WWAY-TV3
Report of System Closure
' Page 2
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2.0 BACKGROUND INFORMATION
' The WWAY site is located at 615 N. Front Street in Wilmington, North Carolina. Several
structures are situated on the property and include: an office/studio building, a building
housing an emergency power generator, a building housing a microwave transmitter, an
' antenna, and numerous satellite communication dishes. A 500 gallon UST, used for the storage
of diesel fuel for emergency power generation, is located approximately 30 feet Northwest of
the former gasoline UST. The remainder of the property is comprised of asphalt parking areas,
and grass/shrub covered grounds. Very steep embankments form the Western and Southern
' boundaries of the site. The Cape Fear River is located less than one-half mile West of the site.
Please reference the Topographic Location Map, included in Appendix B.
' The surrounding property is characterized by commercial and light industrial areas. There are
' no known water supply wells located within one-half mile of the site. All adjacent properties
are supplied by the City of Wilmington water systems.
' The UST system was located on the Southwest side of the site as shown b the Site/Sam lin
y Y p g
' Diagram included in Appendix C. Product supply lines originated at the tank and terminated
at the dispenser located approximately three (3) feet West of the tank fill spout.
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WWAY-TV3
Report of System Closure
Page 3
3.0 REGIONAL HYDROGEOLOGY
The WWAY site is located within the Lower Coastal Plain physiographic province of North
Carolina. The subsurface stratigraphy of this province is comprised of unconsolidated
Cenozoic and Mesozoic sediments. These sediments form a wedge-shaped feature, which
thickens to the East. Underlying the sedimentary package are crystalline igneous and
metamorphic basement rocks.
Ground water in the region is stored and transmitted in permeable sedimentary units known
as aquifers. The aquifer units are typically comprised of sand sized particles. Separating the
aquifer units are less permeable units known as confining layers. The confining units are
typically comprised of silt and clay sized particles. Although some water movement does
occur between aquifers through the confining units, the aquifers typically gain their water
supply from precipitation over "recharge" zones near the respective up -dip limits of the units.
Regionally, the mean ground water flow direction is towards the East.
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' WWAY-TV3
Report of System Closure
Page 4
4.0 FIELD METHODOLOGY
This section details the methodologies employed in UST closure at the site. On behalf of
' WWAY, NET gave Notice of Intent to close the UST system at their Wilmington facility to
DEM's Wilmington Regional Office in a letter dated March 23, 1994. Form GW/UST-3
"Notice of Intent: UST Permanent Closure or Change in Service" was filed at this time. Form
GW/UST-2, "Site Investigation Report for Permanent Closure or Change -in -Service of UST,"
' is completed and included in Appendix D.
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Field activities for the closure of the UST began on April 19, 1994. North Carolina
Environmental Services (LACES) was subcontracted by NET to provide tank closure and
disposal services. Prior to the commencement of excavation activities, NET verified that no
underground utilities were present by walking the site with WWAY engineers.
Originally, NET planned to close the UST system by removal. Prior to excavation, the
dispenser island was removed and all remaining product was pumped from the tank. Once
excavation commenced, it was discovered that the depth to the top of the tank was
approximately five to six feet below grade. The excavated material was described as a loose,
medium to fine sand, with prevalent foreign debris, such as brick, iron slag, coal, and metal
cans. The walls of the excavation were found to be extremely unstable, resulting in collapse.
The collapsing of the excavation threatened the integrity of an adjacent parking lot and satellite
communication equipment. Therefore, it was decided that site conditions dictated UST
abandonment in place.
On April 20, 1994, NCES, under the supervision of NET, began the process of closing the tank
in place. The interior of the UST was inerted with dry ice and explosivity and oxygen lever
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WWAY-TV3
Report of System Closure
Page 5
were checked. An entryway was cut in the top of the tank for employee access into the UST.
Environmental technicians entered the UST, cleaning, flushing and physically scraping the
tank's interior utilizing non -sparking tools. All liquids generated during tank flushing were
containerized in 55-gallon drums, loaded and transported offsite by NCES to a selected
disposal facility, in accordance with NCDEM UST guidelines. A copy of the disposal manifest
is included in Appendix E.
NCES employees reported that the interior of the UST was in very good condition and was
found to be free of perforations and signs of corrosion. Once cleaned, the tank was filled with
a slurry of 800 psi concrete. The entryway was sealed with a concrete cap.
All sampling and analysis techniques executed by NET were performed in accordance with our
"Quality Control Procedures for Soil Sampling and Chemical Testing", North Carolina Division
of Environmental Management guidelines, United States Environmental Protection Agency
Region IV guidance, and local Fire Department regulations and requirements.
Three (3) soil samples were collected from the excavation materials (designated "ES"), and four
(4) soil samples were obtained from the regions below and immediately adjacent to the bottom
of the UST (designated "S"). Please reference the Site/Sampling Diagram, included in
Appendix C, for sampling locations. The samples were collected using a clean, stainless steel
hand auger. All samples were screened for organic vapors using an organic vapor analyzer
(OVA). For screening, aliquots of soil were placed in clean, plastic, zip -lock bags, and allowed
to volatilize in direct sunlight for approximately ten minutes. The head -space in the bags was
then screened for organic vapors using the OVA. The results of soil screening are shown in
Table 1, which is included in Appendix A.

WWAY-TV3
Report of System Closure
Page 6
Duplicate aliquots of the four screened soil samples collected from beneath the UST were
selected for laboratory analysis. Samples S-1 and S-2 were "grab" samples collected from
beneath the vent end and East side of the tank, respectively. Sample S-4/3 was a composite
' of samples collected from the fill spout end and West side of the tank. All laboratory samples
were placed in laboratory supplied containers, maintained on dry ice, and shipped via overnight
courier to Envirotech Mid -Atlantic (ETMA) in Blacksburg, VA, for laboratory analysis of total
petroleum hydrocarbons (TPH/5030). Laboratory analytical results are summarized in Table
2, which is included in Appendix A. Complete laboratory analytical results are included in
Appendix F.
Following tank closure, the excavation was backfilled with material previously excavated. The
' backfilled area was fertilized and re -seeded with grasses typically found in the Wilmington
area.
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WWAY-TV3
Report of System Closure
Page 7
5.0 DISCUSSION AND RECOMMENDATIONS
Although some stressed vegetation was noted in the vicinity of the former fill spout, no other
visual or olfactory evidence of a release was noted during the closure of the UST. Soil
samples collected for screening indicated no release of product; laboratory analysis confirmed
that soil around the former UST has not been impacted by a release of product from the former
UST or dispenser. The former dispenser island was situated immediately adjacent to the fill
spout of the former UST. It was not possible to collect a soil sample from beneath the former
dispenser due to failure of the excavation walls. Photographic documentation of the UST
closure is included in Appendix G.
Due to the innocuous results presented in this report, NET makes no recommendations for
future assessment activities in conjunction with the subject UST closure at the WWAY site.
NET anticipates that the site will receive "Clean Closure" from DEM.

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APPENDIX A
Tables
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WWAY TV-3
NET PROJECT NUMBER 223001
UST Closure
Table 1
Summary of Field Screening Results
Sample
OVA
m
Comments
ES — 1
5.0
Tan, fine sand. No odor.
ES — 2
<5.0
Tan, fine sand. No odor.
ES — 3
<5.0
Black, organic rich fine sand. No odor.
S — 1
8.0
Tan, fine sand. No odor.
S — 2
5.0
Tan, fine sand. No odor:
S — 3
5.0
Tan, fine sand. No odor.
S — 4
<5.0
Tan, fine sand. No odor.
Bkgd.
5.0
Ambient air in empty plastic bag.
NOTES: "Bkgd." denotes Background sample.
Table 2
Summary of Laboratory Analytical Results
Sample
D/L
m /k
TPH 5030
(mg/kg)
S-1
10
BDL
S-2
10
BDL
S-4/3
10
BDL
NOTES: "BDL" denotes Below Detection Limit.
"D/L" denotes Detection Limit.

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APPENDIX B
Topographic Location Map

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APPENDIX C
Site/Sampling Diagram
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APPENDIX D
Site Investigation Report for Permanent Closure of UST Systems
(Form GW/UST-2)
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7NC
Retum Completed Form To: -
111e appropriate DEM Regional Office acoordng to the county of the fall location. State Use Only
[SEE MAP ON REVERSE SIDE OF OWNER'S COPY (PINK) FOR REGIONAL I.D. Number
' OFFICE ADDRESS].
Date Received
' Complete and return within (30) days following completion of site investigation.
:treet
Wrl©� Nart,e tc«a«��n• Indivdual �aa or «�.r SWAY
'o ) 2�t'�'8 N ��ltty Name or Company
Address � �
N F w N A N n V F R Fa 'lily �I 1# available)
Cg4nty 61� IV. f RONT ST., BOX 2068
' —1(JLI Li�LI_N G T 0 N, N C 28402 street ddress or state
Road
City State zipCode R WILMINGTON',' NC .28402
Area Code Telephone Number 2 6 2 y b 7y81 Z
' Area Code Telephone Number
GENERAL' MANAGER [phone]
' Closure Contactor _ Job Title I w o. Area Colo
EEN MEADOWS DR.; WILMIN.GTON NC 4�5. Name) qq (�10) h2-1747
Lab MID —ATLANTIC; 1861 (t'RAYY DR.; BLACKSBURG VATelephone-No
.•
(Name) 28
— 3 8 6 2
' Telepllono No. (Area Code)
Tank Size in Tank wator In
Last Excavation Froa Notab wor or
No GallerlS Product Vil soil contarnin ion ' Dimensions Contents Yes No Yes No
Yes No
See reverse side of pink copy
1 3,000 GASOLINE (owners copy) for additional
X X X information required by
' N.C. - DEM in the
written report and sketch.
1
' Check the activities completed.
® Contact log) fire marshal)
® Nobly DEM Regional Office before abandonment !
Drain & flush piping into • tank. MANDONMENT IN PLACE
' Remove all product and residuals from tank Fill hank until material overflows tank' oponing;
Excavate down to tank ' Plug or cap all openings;.
Clean and inspect tank ® Disconnect and cap or remove vent Una
EM Remove droptube, fig ® Solid inert material, used - specify:.. _ADD P S T
piPo, gauge pipe, vapor recovery tank connoctions, .'
' submersible pumps' and other tank fixtures.
l Cap or plug all lines except tie vent and fill lines.
® Purge tank of all product & flammable vapors.. RED
® Cut one or more large .,holes., In the tanks. L� Create vent hob
® Backfill the area. ' Label tank Date Tank(s) Permanently 'closed: 4 / 19 , 2 0 7 9 4 0 Dispose of tank in approved mannor
Date of Change-in-Sorvlce: Rnal lank destination:
1 I certify under penalty of law that I have
documents, and that based on my inquiryp of those individuals s ined imediatnd am elytlr spo responsible foriar with the obtaining the submittedrmation information, tI believe
lveettached
'submitted information is true, accurate, and complete.that the
Print Warne and offiaal title. of .owner or owner's authorized representative Signature r
�Y�•. N�d�o <olo �rov wc.J,�Y Date Signed
t s-r /NEr on cJr��y S'—S = 9 Ll
' GW/UST-2 Rev.7/29/91 Viiii Copy - Regional Office Yellow Copy - Central Office Pink copy - Omer

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APPENDIX E
Liquid Disposal Manifest
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' 910 497 6310
MAY-06-94 THU 11:43 N.C. ENVIRONMENTAL SV'C. 910 497 6310 P.01
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NON-HAZARQQUS t. Generator's US EPA 10 No. Manifett
WASTE MANIFEST '1171�ntVo-
2. Page 1
of 1
3. Generator'$ Name and Mailing Address
TV
FROM STREW, WIENINGIM NORTH CARMM
4. Generator's Phone ( }
5. Transporter 1 Company Name 6. US EPA ID Number
CAROLM QNMMAL SW •9.8.4.3.0 .
7. Transporter 2 Company Name $. US EPA ID Number
9: Designated Facility Nome and Site Address 10, US EPA ID Number
A. Transporter's Phon
UNIM OM ERdMRS
B. Transporters Phone
1455 FAIR"M AVE
C. facility's Phone
ATLMA, GA 3031E 0 8 6 9.7.3.6.5.8.
404-457-5120
11. Wane Shipping Name and Description
12. Containers
Total
Unit
No. Type
Ouonti
Wf Vol
a•
TANK BMV%0/CWM0MTM MATMOIJSE$
2
SD
100
Gal.
b.
E
N
E
R
A
c.
T
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0. Additionol Descriptions for Materials Listed Above
E. Handling Codes for Wastes listed Above
1S. Special Handling instruction and Addif'tonol information
16. OWERATOR'S CERTIFICATION• i c.rTify the materials doscribed above on this rounifea are not subject to Federal regulations for reporting proper disposal of Notardays Waste.
Printed/Typed Name Signature
$IEEE` JORDM
Month Day Year
T
17. Transporter 1 Acknowledgement of Receipt of Materials
Printed/Typed Name
Signature
Month Day Yeor
S
•
1B. Transporter Q Acknowledgement of Reeei t of Moteriak
Printed/Typed Nome
Signature
Month Dog Yeor
R
I
19. Discrepancy indication Space
A
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20. Facility Owner or Operator; Certification of receipt of wastb materials covered by this manifest except as noted in Item 19.
T
Y
Printed/Typed Name
Signature
-
Month Dog Year
JAMS EDUIDWAY
f`T1xi:�Ift1Al..liFTMihi11 e'rb tx�At�taarnfs

MAY-06-94 THU 11:42 M.C. ENVIRONMENTAL SVC. 910 497 6310
P.02
NON -HAZARDOUS
1. Generotar's US EPA ID No.
Manileri
Do
WASTE MANII'EST
2,
�um�ne�o.
3. Generafor s Name and Mailing Address
TV
PROW uSTRI'k' T/ WnMEWM,,
NOR'tii CA12MM
4. Generators Phone( }
1. Transporter t Company Name
6.
US EPA ID Number
W= C R(1tT.TAPA IINaHONMMAL
SVC 1 - 9.8 •
4.3.0.0.6.1.6
7. Transporter 2 Company Name
8.
US EPA ID Number
^9. Designated Facility Name and Site Address
10.
US EPA iD Number
MUM OM BROYOW
1455 FAIRMW AVE
ATLAWMr GA 30318
.0.8.6.9.7.3.6.5,8,
11. Waste Shipping Name and Deseripfion
o.
TANK IiOri'Ow/GO[Vr mmaTID unaVVFVEL
I b. _
N
E
R
T c
O
R
' d.
' D. Addfionol Descriptions for Materials Listed Above
2. Page 1
of I
A. Transporter's Phon
B. Transporters Phone
C. facility's Phone
404-457-51
12, Containers
No. Type
2 SD
13. 14.
Total Unit
QVanf' VA V
100 Gal
—I E . I '
E. Handling Codes for Wastes Usted Above

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APPENDIX F
Laboratory Analytical Results for Closure Samples
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' 04/25/94 14: 44 0703 231 3984 703 231 3984_ ETNA NET _WNC, . IM 001
" - -
- • EnvroTe�h� ll�ici Atlantic - , ..
Vjr • - -whCarporate-Resmich cefitex .. _ ...
1861 Pratt Drive: =
Blacksbma; V-umia 248iG0.
[phone] FAX [phone]'
Apr1'i 25, 1994
—.. ;
Client = NET
: 295: A N. Green Nleadarnrs Drive - -
_ - Wlmingtun l_4:C'I 5
77*
' Attention: Joe Beaman F 9�0-392=8654 - -
Report #: 7043 . : • Date Received: 4/20/94
Project: - - _- - Prc j #:= 223001
P.O. #:
: e I,of 2
. .. sample Identificatiori
• Samples : submitted and identified IW client as: -
Sample Matrix Field Tdemti£caiion..-__,.,., Date Time Collected'
7043A SoIl : -: x .... 4/19/94 11:15
' 7043B , Soil S-2 .. _ - - . 4/19/94 11.30
- 7043C ::. Soil 4J19/94 12-00
_.._
All au$lyses were iiert'ot ed W. =wrdgwm with EPA. methods• referenced in Wethods for Chemical Analysis of _
Water and Wastes EPA 60014-79 revised N larebt L983 amd/or '°rest }4yetbuds for B+ vaauatmg Solid Waste,
,. Physk2VChemiad'M,ethade, SW -Ward U iotrr -- - -

04/25/94 14:45 '0703 231 3984 ETNA NET WNC 2002
fojeci: 22300I.
Analysis
'T'PFFI t�•�a)
7043A 7043D 7043C
D/L S=1 S=2 S-4• 3.
10 BDL B.DL BDL
ENVIROTECH IHIM-ATLANTIC
April 25,1994
Page 2 of 2
Quality Control Data
Analysis %STD %Spke 9aRD EPA# Analyst Date AnaV=d
TPFH 5030 T. McCoy QZ/94
C Benzene 113 1
BenZeue 88
Toluene 107 1
�r ti
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wl-
D!L - Detection. Limit BDL - Below Detection Limit
Son resnlis 'are reported on a dry weight basis unless otherwise noted.

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APPENDIX G
Photographs
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Beginning excavation
activities.
Top of the tank
is exposed.
Approximately five feet
below land surface.

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Backfilling complete.
End of project.
Tank is prepared for
cleaning and filling.