NCG510330_Regional Office Historical File Pre 2018 (2)

ALM
NCDENR
North Carolina Department of Environment and Natu, IyResou
Division of Water Quality
Michael F, Easley, Governor
2006
1"lr, Banks Garrison
South Central Oil Company, Inc.
2121 West Main. Street
.Albemarle, 28001,
A
r .,
William G. Ross,
Alan W. Klimek, PEE., Director
APR 0 5
Subject: Rescission of NCG51O330
Plaza Pantry Phillips 66
Stanly County
Dear Mr. Garrison:
Division staff has confirmed that the subject Certificate of Coverage [issued under NPDES
General Permit NCG5.1.6060] is not required, as no remediation system was ever installed.
Therefore, in accordance with your request, CoC NCG51.O330 is rescinded, effective immediately,
If in the future your company wishes to discharge wastewater to the State's surface waters, you
roust first apply for and receive a new NPDES permit. Discharge of wastewater without a valid
NPDES permit will subject the responsible party to a civil penalty of up to $25,000 per day.
If ys a have questions about this matter, please contact Charles Weaver of my staff at the
telephone number or address listed below.
ti PIS
Fran Pherson, IBvVQ } udget Office
1617 Mali Service Center.
512 North Salisbury Street, R reig?r, North CarnHrs
Internet: h2ra enr.s1ate n
Phone: [phone] extenslen }11' r FAX 919 " 3-C1,719
Orr, V,a t pr:,row
t h, North Carolina 2769 -1F. rt
Nod h Caro ma
)Vatilr //l,
pport% :MA„,,rr

State of North Carolina
Department of Environment,
Health and Natural Resources
Division of Environmental Management
James B. Hunt, Jr., Governor
Jonathan B. Howes, Secretary
A. Preston Howard, Jr., P.E., Director
June 4, 1996
Mr. Banks Garrison
2121 West Main Street
Albemarle, North Carolina 28001
Dear Mr. Garrison:
Subject: General Permit No. NCG51O()(X)
Cert. of Coverage NCG510330
Plaza Pantry Phillips 66 Station.
Stanly County
In accordance with your application for discharge permit received on December 29, 1995 by the
Division, we are forwarding herewith the subject Certificate of Coverage to discharge under the subject
state - NPDES general permit for petroleum contaminated groundwater remediation systems and one set of
final approved plans and specifications. Authorization is hereby granted for the construction and operation
of a 4320 GPD remediation system consisting of an oil/water separator, an air stripper, and carbon
adsorption with discharge of treated wastewater into an unnamed tributary to Mountain Creek, a Class
WS-IV stream in the Yadkin River Basin. This Certificate of Coverage is issued pursuant to the
requirements of North Carolina General Statute 143-215 .1 and the Memorandum of Agreement between
North Carolina and the US Environmental Protection agency dated December 6, 1983 and as subsequently
amended.
If any parts, measurement frequencies or sampling requirements contained in this perm
unacceptable to you, you have the right to request an individual permit by submitting an individ
application and letter requesting coverage under an individual permit. Unless such demand is made, this
certificate of coverage shall be final and binding.
Please take notice that this certificate of coverage is not transferable except after nonce to
the Division of Environmental. Management. The Division of Environmental Management may require
modification or revocation and reissuance of the certificate of coverage in case of change of ownership or
control of this discharge.
The Authorization to Construct is issued in accordance with Part II.I, Paragraph 2 of NPDES
Permit No. NCG510000, and shall be subject to revocation unless the wastewater treatment facilities are
constructed in accordance with the conditions and limitations specified in Permit No. NCG510000.
In the event that the facilities fail to perform satisfactorily, including the creation of nuisance
conditions, the Permittee shall take immediate corrective action, including those as may be required by this
Division, such as the construction of additional or replacement wastewater treatment or disposal facilities.
P.O. Box 29535, Raleigh, North Carolina 27626-0535
An Equal Opportunity Affirmative Action Employer
Telephone [phone]Ci83 FAX [phone]
50% recycled/ 10% post -consumer paper

Permit No. NCG510330
Authorization to Construct
Plaza Pantry Philips 66 Station
June 4, 1996
Page 2
The Mooresville Regional Office, telephone number [phone], shall be notified at least
forty-eight (48) hours in advance of operation of the installed facilities so that an in -place inspection can be
made. Such notification to the regional supervisor shall be made during the normal office hours from 8.00
a.m. until 5:00 p.m. on. Monday through. Friday, excluding State Holidays.
Upon completion of construction and prior to operation of this permitted facility a certification must
be received from a professional engineer certifying that the permitted facility has been installed in
accordance with the NPDES Permit, the Certificate of Coverage, this Authorization to Construct and the
approved plans and specifications. Mail the Certification to the Permits and. Engineering Unit, P.O. Box
29535, Raleigh, NC 27626-0535.
A copy of the approved plans and specifications shall be maintained on file by the Fermin e for the
life of the facility.
Failure to abide by the requirements contained in this Authorization to Construct may subject the
Permittee to an enforcement action by the Division of Environmental Management in accordance with
North Carolina General Statute 143-215,6A to 143-215.6C.
This permit does not affect the legal requirements to obtain other permits which may, be required by
the Division of Environmental Management or permits required by the Division of Land Resources, the
Coastal Area Management Act or any other Federal or Local governmental permit that may be required.
If you have any questions concerning this permit„ please contact Mary Cabe at telephone number
[phone], extension 518.
Sincerely,
OriginalSigned By
David A. Goodrich
A. Preston Howard, Jr., P. E.
cc: Central Files
Mooresville Regional, Office, Water Quality
Mooresville Regional Office, Groundwater
Operator Training and Certification Unit
Facility Assessment Unit
Permits and Engineering
GCI Geo-Environmental Consultants, Inc.
11704 Reames Road
Charlotte, NC 28269-7637

STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT, HEALTH, AND NATURAL RESOURCES
DIVISION OF ENVIRONMENTAL MANAGEMENT
GENERAL PERMIT ,NO, NCG510000
CERTIFICATE OF COVERAGE NO. NCG5I030
TO DISCHARGE PETROLEUM CONTAMINATED GROUNDWATER AND SIMILAR WASTEWATERS
UNDER THE
NATIONAL
In compliance with the provision of North Carolina General Statute 143-215.1, o
regulations promulgated and adopted by the North Carolina Environmental Manage
Federal Water Pollution Control Act, as amended,
South Central. Oil Company, Inc.
Cawful standards and
Comm scion, and We
is hereby authorized to construct and operate or continue operation of a groundwater treatment system consisting of
an oil/water separator, an air stripping system and carbon filtration for petroleum contaminated groundwater or
similar waste streams with the discharge of treated wastewater from a facility located at
Plaza Pantry Phillips 66 Station
NC Hwy, 24/27173 & NC Hwy. 24/27
Stanly County
to receiving waters designated as an unnamed tributary to Mountain. Creek in the Yadkin River Basin
in accordance with the effluent limitations, monitoring requirements, and other conditions set forth in Parts I, II, III
and IV of General Permit No. NCG510000 as attached.
This certificate of coverage shall become effective June 4, 1996.
This Certificate of Coverage shall remain in effect for the duration of the General Permit.
Signed this day June 4, 1996.
Original Signed By
David A. Goodrich
A, Preston Howard, Jr., P.E., Director
Division of Environmental Management
By Authority of the Environmental Managemen
ion

'76
h•
Stan),
Garce7s
Cep-
'77
A HIGHWAY UGHT•DLTr RCA°. HARD OR
SUPF,A E - IMPROVEDSUREACE
SECONDARY HlGlet
.AR! SURFACE. C'-'""OIN UNWPRO'VED+'.CAD
Latitude "67°" Longitude-
E ap # F18SW Sub -basin 03-07-08
Stream Class W'S-IV
Discharge Glass 66
Receiving Stream UT to tylo tntain Creek
Permit exp, 7/31/97 Qw 0.00432 GD
'78 D 660 000 FEET '79
SCALE 1:24 000
BQ°17 ",30"
35'22'30'"
"1 MILE
7000 FEET
KILOMETER
CONTOUR INTERVAL 10 FEET
QUAD LOCATION
NCG510330
Plaza Pantry
Phillips 66 Station
Stanly County

State of North Carolina
Department of Environment,
Health and Natural Resources
Division of Environmental Management
James B. Hunt, Jr., Governor
Jonathan B. Howes, Secretary
A. Preston Howard, Jr., P.E., Director
January 8, 1996
Mr. Banks Garrison
South Central Oi.l. Company, Inc.
2121 West. Main Street
Albemarle, North Carolina 28001
Subject: Receipt of NPDES Permit Application
Permit No. NCG510330
Plaza. Pantry Philips 66 Station
Stanly County
Dear Mr. Garrison:
The Division acknowledges receipt of your Notice of Intent for coverage under General
Perntit NCGS 10000 and an authorization to construct, your Corrective Action Plan, and your
Corrective Action Plan addendum, all in triplicate, and a 5550 check (# 6093) received on
December 1.8, 1995.
Additional information is required before the permit can be processed. Three copies
of the plans and specifications for the wastewater treatment system, stamped by a North
Carolina Professional Engineer, must be submitted. I have already contacted Mr, James
Lytton and he will be supplying this information.
Be aware that the Division's regional office, copied below, must provide
recommendations from. the Regional Supervisor for this project prior to final action by the
Division.
1 am by copy of this letter, requesting that our regional Office prepare a Staff Report
containing recommendations regarding this discharge. This application has been assigned
to me for review. If you have any questirins, I can be contacted at (919)-733-5083,
extension 518.
Sincerely,
Mary L. Cabe
Environmental Engineer
cc: Mooresville Regional Office/Water Quality Section (with. attachment)
Permits & Engineering Unit
Mr. James Lytton, Geo-Environmental Consultants, Inc.
P.©, Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action E.npioyer 50'% recycled/ 10% post -consumer paper

SOC PRIORITY PROJECT: Yes
No X
To: Permits and
Engineering
Unit
Water Quality Section
Attention: Mary Cabe
Date: January 24, 1996
NPDES STAFF REPORT AND RECOMMENDATION
County: Stanly
MRO No.: 96-5
Permit No. NCG510330
PART I - GENERAL INFORMATION
Plaza Pantry Phillips 66 Station
1. Facility and Address. Stanly County
2. Date of Investigation: 01-23-96 I
3. Report Prepared By: Samar Bou_Ghazale, Env. Engineer
Persons Contacted and Telephone Number: Mr. Lee
L5ytton,
with
4. Inc.,; Tel# {
Gen -Environmental Consultants, Hwys 24/27/73 and
5. Directions to Site: From the intersection
traveast on Hwys
Hwy 52 in Albemarle, Stanly
24/27/73 approximately 2.0 miles to the intersection with Fast
Main
Street (SR 1597). The site is located in the
southeastern quadrant of the intersection.
List for all discharge points:
6. Discharge point(s).
g
Latitude, 30° 20' 57" Longitude: 80° 09' 57"
Attach a,U.S.G.'S. map extract and indicate treatment facility
site and discharge point on map.
USGS Quad No.: F 18 SW USGS Quad Name: Albemarle
7. Site size and expansion are consistent with application?
Yes X No _ If No, explain:
8. Topography (relationship to flood plain included): Sloping
iat
the rate of 2 to 3%. The site is not located in a flood p
9.
Location of nearest dwelling: There are no potable wells or
other welts within 1500 feet of the siter

10. Receiving stream or affected surface waters:
Unnamed
Tributary to Mountain Creek.
a. Classification: WS IV
b. River Basin and Subbasin No.: Yadkin -Pee Dee RiveerrtBasin
c, Describe receiving a will be intoam features nd the road side
downstreampen
uses: Discharge
ditch along East Main Street. The diecharged xwater fio©s
into the ditch along East ain ieet unnamed tributary to
feet prior to discharging into the
Mountain Creek. Pertinent downstream uses are not known.
PART II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS 2 MGD
1« a.
Volume of wastewater to be permitted: 0.0043
(Ultimate Design Capacity)
b.
What is the current permitted capacity of the wastewater
treatment facility? N/A.
c.
Actual treatment capacity of the current facility
(current design capacity)? N/A.
and construction activities allowed by previous
d. Date(s) previous two
Authorizations to Construct issued in the p
years: N/A.
e. Please provide a descr.ption of existing or substantially
constructed wastewater treatment facilities: N/A.
provide a description of proposed wastewater
f. Please groundwater treatment
treatment facilities: The proposed
recovery Wells,
system will consist of monitoring er, and a carbon
an oil water separator, an air stripe
adsorption system.
Possible toxic impacts tosurface
be toxic.: Discharges of
this nature have been shown
h. Pretreatment Program (POTWs only):
N/A.
2. Residuals handling and utilization/disposal scheme: Generation
of residuals is not expected.
plant classification (attach completed rating
. Treatment P sheet): Proposed, no rating given.
g.
4. SIC Code(s): 5541
NPDES Permit Staff Report
Version 10/92
Page 2

Primary: 66
Main Treatment Unit Code: 56000
PART III - OTHER PERTINENT INFORMATION
1. Is this facility being constructed with Construction Grant
Funds or are any public monies involved (municipals only)?
N/A.
2. Special monitoring or limitations (including toxicity)
requests: Toxicity may need to be limited/monitored due to
the suspected toxic nature of such discharges.
Important SOC, JOC or Compliance Schedule dates: (please
indicate) N/A.
4. Alternative Analysis Evaluation: Has the facility evaluated
all of the non -discharge options available. Please provide
regional perspective for each option evaluated.
Spray irrigation: This option has been evaluated by the
permittee and found not to be an alternative due to limited
space.
Connection to regional Sewer System: The City of Albemarle WWT
System is at or near maximum toxicity limit. Therefore, the
City is not accepting discharges from groundwater remediation
systems.
Subsurface disposal: This option has also been evaluated and
found not to be a viable alternative due to shallow water
table and low permeable soils.
5. Air Quality and/or Groundwater concerns or hazardous materials
utilized at this facility that may impact water quality, air
quality or groundwater? Contaminated groundwater already
exists at the site. GW comments should be obtained. No
hazardous materials concerns. An air quality permit for this
site is not required. However, registration with the Air
Quality Section is required.
PART IV - EVALUATION AND RECOMMENDATIONS
South Central Oil Company, Inc., is requesting an NPDES
General Permit for the discharge of treated groundwater at the
subject site.
Since the discharge is proposed to be to a roadside ditch, it
NPDES Permit Staff Report
Version 10/92
Page 3

is ended that the applicant obtain approval r the
Department of TTransportation and the City of Albemarle.
It is also reco ended that the WPDDS Pe it be issued once
the above mentioned concerns (including toxicity) have been
addressed/ and commencomments from SW Section have been received
DES Permit Report
Version 10/92
Page 4
om

Q'
6
ALBEMARLE QUADRANGLE
NORTH CAROLI.NA-STANLY CO.
7.5 MINUTE SERIES (TOPOGRAPHIC
SW/4 ALBEMARLE 15' QUADRANGLE
7 FEET °79
8Q°©7'30"
35°22`30"
9
9
FEET
2

APPLICATION FOR P E GENERAL L PE IT
PLAZA PANTRY PHILLIPS 66 SERVICE STATION
ALBE ':._ARLE, NORTH T AROLI +iA
Prepared For:
SOUTH CENT
2121 Wes
COIL COMPANY
Ire Street
1'be arle, North Carolina na 001
Prepared :
GEO-ENV1RONMENTAL CONSULTANTS, INC.
1170Realms Reuel
l otte, North Caroli a 7i3269
December 1995

GEO-ENVIRONMENTAL
CONSULTANTS, INC.
December 5, 1995
Mr. David Goodrich
Division of Environmental Management
NPDES Permits Group
Post Office Box 29535
Raleigh,. North Carolina 27626-0535
Subject: Application for NPDES General Permit
Plaza Pantry - NCDEHNR Incident 46376
NC Highway 24/27/73
Stanly County
Albemarle, North Carolina
Dear Mr, Goodrich:
Geo-Environmental Consultants, Inc. (GCI) is pleased to submit this Notice of Intent fir the above
referenced project. This application is for a NPDES General Permit coverage under General Permit
NCG510000; Groundwater remediation projects designed to treat petroleum contaminated
groundwater. GCI h.as developed a Corrective Action Plan that addresses the treatment of the
petroleum contarninated groundwater. Also GCI has submitted an addendum to the CAP regarding
theaddition of an Oil/Water Separator and Activated Carbon to the groundwater treatment system.
These two treatment items where added to comply with the guidelines of the NPDES General permit.
It is the goal of South Central Oil Company and GCI to restore groundwater quality to the level of
the NCAC Title 15, Subchapter 2L water quality standards, or as close as is economically and
technologically feasible. The Plaza Pantry project site treatment system will provide adequate
treatment of impacted groundwater at the site in accordance with the requirements of the
NCDEHNR.
A Com rn on Sense Appro a. h To A Cleaner Fnvironnienl
I 7 0 4 Reaiies R. („) ad, Charlotte. INC 28269-7637 • 704-596-8788 • FAX: 704-5 '9 6-- 8 7 7 0

NPDES General Permit Application
Albemarle Plaza. Pantry
Page 2
GENERAL SYSTEM DESCRIPTION
The proposed treatment system is a small scale pump and treat with vapor enhanced recovery
remediation system. Initial remediation will consist of groundwater recovery from two 2" QED
controller -less recovery pumps located in the impacted area and the injection of air into another 2"
well. The system is designed to provide contamination containment and if determined necessary by
the NCDEHNR, additional recovery yells and/or vapor extraction system may be added. Utilizing
intermittent pulse pumping technology, the cyclic pumping is capable of delivering a maximum flow
of 10 gpm, but will he operated at a design flow of 0.5 to 1.5 gpm depending on the aquifer
characteristics. The overall basis of design for the recovery pumping system is to provide a medium
flow of impacted groundwater that will cause the pump to go on and off frequently near the upper
level of the impacted groundwater. The recovery wells will deliver the groundwater to an Oil/Water
Separator for initial treatment. After moving. through the Oil/Water separator the groundwater is
held in a liquid storage tank that utilizes high and low water sensing systems connected to the
recovery wells to ensure hydraulic control. It should also be noted that the Oil/Water Separator is
fitted wt-off controls that are connected to the seliniod switch that operates the
recovery pumps. Contaminated groundwater will be processed from the storage tank to a stacked
tray aerator that will have its own transfer pumps, inlet blower, and holding tank. The groundwater
collected in the holding tank of the tray aerator vial be intermittently pumped to the twin carbon
c�annisters for polishing. The intermittent pumping from the air stripper holding tank will occur
every 20 minutes for a duration of 3 to 10 minutes. The Groundwater is finally released to the
discharge piping after it has passed through the two high pressure carbon cannisters. The vapor
enhanced groundwater recovery is achieved by the application of a vacuum on the two recovery
wells. This system uses an explosion -proof blower capable of a flow rate of 60 SCFM at 2-3 psi
negative pressure. The volatile and semi -volatile organics are removed as they pass through a
moisture separator and in -line filter connected to the blower. There will also be a low flow air
injection system installed a this project site. Using a 1..5 HP rotary vane compressor, wi th a flow rate
of 15 CFM at 15 to 25 PSI, high pressure air will be injected into a 2" well blow the groundwater

NPDES General Permit Application
Albemarle Plaza Pantry
Page 3
table. This will allow further degradation of volatile and se volatile organics and increase
biodegradating activity in the soil matrix.
SYSTEM FAIL-SAFE MEASURES
The remediation sn has many fail-safe measures and automatic shutoff systems incorporated
into the design of the system at all levels of operation. The pumping is controlled with a solenoid
switch that will shut off air to the groundwater recovery pumps, or allow air to the recovery pumps.
This switch is linked to the high and low level automatic switches located on the surge tank, and on
the seperation chamber of the Oil/Water Separator. Based on liquid levels in the surge tank and or
the Oil/Water Separator, these switches will turn the recovery pumps on and off. The remediation
building itself is constructed on a 6 inch high concrete curb which is designed to act as a containment
vessel in the event of a spill within the remediation building. All electrical connections and
equipment, such as compressors, transfer pumps, and blowers are explosion proof and installed by
a professional electrician. These electrical systems use industrial control panels, conduit to route
wiring, and install breakers and on -off. switches. The air stripper will have its own control panel and
a liquid level gauge with pump controls in the sump tank. The piping that transports the
groundwater through the system has valves and unions which allows control of flow for system
maintenance or in the event of a system component malfunction. The Oil/Water Separator is
equipped with a tight fitting lid, to control fumes. The surge tank and Air Stripper will be vented
to tnaintain a safe air quality in the remediation building. The remediation building itself will be
vented and equipped with fans to ventilate the structure.
SYSTEM M(NITORING
The monitoring plan for the Plaza Pantry project site will include both groundwater monitoring and
system monitoring. All results of the monitoring will be recorded in the project journal and reported
to the NCDEHNR on a quarterly basis, System monitoring will include sampling of the effluent for
Methods 601 and 602 Extended. The treatment system will have a valve installed just prior to the
discharge piping, so an effluent sample may be easily obtained. The groundwater monitoring will

NPDES General Permit Application
Albemarle Plaza Pantry
Pa ,e 4
be performed quarterly on all of the on -site wells in accordance with. EPA Methods 601 and 602
Extended, The wells will also be monitored on a monthly basis to measure the groundwater levels,
which will give an indication of the hydraulic control provided by the recovery wells. The
remediation system will be checked every two weeks and maintenance will be perfom ed at monthly
andlor biannual intervals. The system components that have been selected are easily maintained and
allow routine cleaning of internal media. During these periodic visits the system operator will check
the functioning of all system components. Also the operation of all primary and secondary shutoff
controls will be examined. Any presence of BTEX constituents in the treatment system discharge
will be observed to determine if charcoal adsorption capacity has been breeched. For every visit the
operator will record all observations in the journal at the project site, complete chain of custody
forms for groundwater samples that will be laboratory tested, and report all observations that concern
permit conditions to the NCDEFINR. Please refer to Table 5 on page 26 of the attached Corrective
action Plan for a summary of the monitoring and maintenance schedule.
Please refer to Appendix D for the completed NPDES General Permit Application Forin, Some
items on the application have been addressed in the referred appendix or the attached Corrective
Action Plan and Corrective Action Plan. Addendum that is on file with the NCDEE NR. We have
noted on the application form where to find the responses to those items. If you have any comments
regarding the contents of this permit application, please contact our office at (704) 596-.8788.
Sincerely,
GEC)-ENVIRON
ENTAL CONSULTANTS, INC.
oph T 1tirn
Senior Project Engineer
C"WP=P'L.ZNPDAP.LE:T

POLLUTION INeIDENT/U.S.T.
A
EAK REPRTING FORM
Division of Environmental Management
GROUNDWATER SECTION
TYPE OF ACTION
1. Emergency Response
2. Compliance investigation
3. Complaint Investigation
4. Routine Inventory
TENTIAL HAZARDS:
oxtc Chemicals
S.T. Leak
2. Radioactivity 3. Air Emmissions 4. Ealo
INCIDENT DESCRIPTION
Incident Location/Name
Address
CI
7
Clty/Town
iy
cribe Ind
County
on
Date Incident
Occurred or Leak
Detected
L.U,S.T., How Leck
as Detected
1. Tank Gauging
2, Vapor Monitoring
3. GW Monitoring
5, Interstitial Monitoring
e, Tank Removal
7, Tightness Test
4, Contractor who tightness tested, removed tank. or Installed leak
detection system.
PERSON REPORTING INCIDENT
Nome
ompony /Agency
PORTED BY: 1. Tank owner/opera
Telephoca
2. Government agency
4. Facility owner (Non-LU.S.T.)
RECOMMENDED ACTION
Pa
ULTIPLE CHOICES PO tBLE
Iravestigation complete
Continue Investigation
3. Inttiatefcompiete cleanup 5. Ehtiiln+ sport
4. Long-term remedial action 5.8. lisue NOV
7. Confirm leak
8. Monitoring plan
Com
1
CLEANUP LEAD
2.
D.E.tl, RealonContac
nkl

POLLUTION INCIDENT/U.S.T. LEAK REPORTING FORM
MATERIALS INVOLVED
I WATERS AFFECTED 1. Yes
Ash Kill 1. Yes
POLLUTANTS INVOLVED
AMOUNT STORED OR
TANK CAPACITY
AMOUNT LOST
IMPACT` ON SURFACE WATERS
No 3. Potentially
Name of"Streom
AMOUNT RECOVERED
-xr.4'`Y,-
Distance to Stream(t1)
m Cass
WELLS AFFECTED 1. Yes
Population Served
By Affected Wells
PRIMARY SOURCE OF
POTENTIAL POLLUTION (Select one)
IMPACT ON DRINKING WATER SUPPLIES
2.No 3, Potentially
Estimated Population Served By
Potentially Affected Wells
•
No. of Wells
Affected
No. of Wells.."
Potentially Affected
Aqulfer(s) Being Used
1. Water Table 2. Confined 3. Bed¢ock
POTENTIAL SOURCE OF POLLUTION
CT one
. Intentional dump 13. Well 1. Pesticlde(herblclde
2. Pit, pond, lagoon 14, Dredge spoil 2. Radoactive waste
k-underground 15. Nonpoint source asolinefdiese1
4, Spray Irrigation 4, Heating oil
5. Land application 5. Other petroleum prod.
6. Animal feedlot 6. Sewage/septoge
7. Source unknown 7. Fertilizers
8. Septic tank 8. Sludge
9. Sewer line 9. Solid waste leachate
10. Stockpile 10. Metals
. Landfill 11. Other Inorganics
2, Spill-surfade 12. Other organics
for N©nprlmory Sauces.
LOCATION
cllity
ad
3. Waterway
4. Pipeline
5. Dumpsite
6. Highway
7, Residence
Confirmed Violation
5 NCAC ,.
Yes No
21APart 1
Yes No
21APart ll
Yes No
4. Fed
ET[ING
1. Residential
�
2. Industrial
r 3.- Urban
4. Rural
I/Stoats U,S.T. rules
Yes

POLLUTION INCIDENT/U.S.T. LEAK REPORTING FORM
POTENTIAL SOURCE Oi ''NER-OPERATOR
Company
City
ULS,T. REGISTERED
1. YES
2. NO
FEDERAL U.S.T..
DESIGNATION
1 Regulated
2, Non -Regulated
STATE U.S,T.
DESIGNATION
orrmercicl
2. Non -Commercial
SOURCE/U,S,T,
IN USE
2 ES
—3, NO
SOURCE PER
1. Yes
2.No
PERMIT NUMBER
SOURCE ON
ERRIS UST
Yes
No
U.S,T, LEAK PREVENTION MEASURES
Was tank retrofitted with overfill protection? 'e
1. Yes
2. No
When and by whom?r
Was tank retrofitted with Interior lining?. V w r
1, Yes
2. No
When and by whom?
Was tank retrofitted wltt'n cathod#c protection? V
1.Yes
2.No
When and by whom?
Street Address
PERMIT TYPE OWNERSHIP
t A O. N/A
1. Non -discharge 1. Municipal
2. Oil terminal 2. Military
3, Landfill 3. Unknown
4, Mining (Orlvate
5. NPDES 5. Federal
6, RCRA 6, County
7. State
elephor e
04,
rfr~
OPERATION TYPE
0, N/A
1. Public Service
2. Agricultrurai
3. Residential
4, Educational/Religious
5, Industrial
ommerciai
7. Mining
ON FOR
ansportation
nlca!' tali re
3. Facility
4. Inventory only
5. Human erroa
6, Vandalism
7, Unknown
ACTIONS TAKEN
Investigation. Contain{raent. Cleanup, etc,
_1_rfi
Circle Appropriate Rasp©
Lab Samples Taken By: 1. D,E,M. 2- D.H.S.
onsibie Port
4. None
Samples Taken Include

PO .: :ON INCIDENT/U.S.T. LEAK REPO' JG
LOCATION OF INCIDENT
7 1/2 Min. „rod Nam
n. Qucd Nunn
In : Sec
g.Min:Sec :
ch Shouid Identity The Following:
ctl©n of Overland Flow
1. Pollutant Source(s) . lrnp cted and Threatened Water Supplies
4, Stgniflcant Recharge and Discharge Features 5. Relative Physical Structures (roads.
buildings, etc.)
d. North Arrow 7. Scale

ldent Name:
Lroundwater Incident File tt
GRO
Region/Co
ye
Perfonn ed by:
NORTH CAROLINA
ATER CONTAMINATION INCIDENT 1\'
SITE PRIORITY RANKING SYSTEM
(To be completed by Regional Office)
GW.rl,F- 300
page 1 of 3
1Ci/1/90
AGE ENT
A.
plosion free product ixn confined areas or vapa r phase product
detected at or above 20% of the lower explosive limit, award 50
points total
Fire - free product subject to ignition in exposed areas such as
surface water impoundments, streams, excavations, etc.;. award 50
points total.
IL EXPOSURE ASS
A. Contamirnated Drinking Water Supplies
1, Private, domestic water supply well contairning substances in con
cen+a Lions exceedLng Class GA underground water quality standards;
award 10 points per well
2. Public or institutional water supply well consubstances in
concentrations exceeding Class GA underground water quality
standards; award 30 points per well
3. Exceedances of Cl s WS-1 surface water quality standards as a
result of groundwater discharge; award 20 points per surface water
body impacted.
If a water supply well identified in items HAI and 11A2 cannot be
replaced by an existing public water supply source requsring hook-
up only; award additional 10 points per irreplaceable well
Threat to Uncontarr` mated
Water Supplies
Private, domestic water supply well located wi
gradient of contaminant source; award 10 points per well
2, Public or institutional
dowdient of cont
0 feet down
supply well located within 1/2 mile
source;. award 15 points per well
Raw surface water intake for public water supply located within 1/2
mile' down client of contaminant source; award 5 points per water
supply system
If any well idenbfied in items ILB.1 and ILB.2 is located within 250
feet of con rratnant source; award additional 20 points total
C. Vapor Phase Exposure
Points Awarded
1. Product vapors detect
(cont.)
bitable buildin s)A award 30 points total

2, Product vapors detected
ings, sewer lines, utility
er confined areas (uni biia.ble build -
etc.); award 5
CONTAMINANT HA AID SSESSMENT (chemical groups are categorized
toxicity, mobility and persistance in the environment). Erraluate the mast
substances detected and select only onQ of the following:
A. Award 30 points tot
following groups:
con
detected are identified wi
1. Aromatic (Benzene) Adds
2, Aromatic Hydrocarbons (Beare Derivatives)
3. Sulfonated Hydrocarbons
4, Halogenated Hydrocarbons
5. Alkaloids
6. Anilines
7. Phenols
8. Aldehydes
9, Ketones
10. Organic Sulfur Compounds (Sulfides, M 'caplans)
1.1. Organornetallic Compounds
12. Cyanides
13, Esters
14. Metal Salts, Ineluadi g Heavy Metals
on
dous
Award 20 points total if contaminants detected are identified wwilh any of the
following groups:
1. Aliphatic (Fatly) Acids
2. Alcohols
3. Aliphatic Hydrocarbons (Petroleums Derivative)
4, Pyridines
5. Thiocyanides
6. Mineral and Metal Acids
7. Mineral and Metal Bases
8. Oxides
9, Sulfides
C. Award 10 points total if contra .ants detected are identified with any of the
following groups:
1, Aliphatic Amines and Their Salts
2, Sugars and Cellulose
3, Carbon and Graphite.
IV, SOURCE ASSESSMENT
A. Free product thickness of ? 1/4 inch defected on water table in
monitoring well; award 20 points total
B. Contaminated Soil (select only one
3
0
1. Soil saturated with product (saturation del em led by release of free
liquid upon compaction of a seal s:zmple by hand pressure); award 10
points total

2. Soil exhibiting organic vapor content above 100 ppm as measured by
organic vapor or volatile organic detection equipment; award 5 points
total
C. Uncontrolled or Unabated Primary Source ([neluding dump sites, stockpiles,
lagoons, land applications, septic tanks, Iandfitts, underground and above
ground storage tanks, etc.)
1. Suspected or confirmed source rernairis in active use and continues to
receive raw product, wastewater or solid waste; award 20 points per
source
Active use of suspected or confirmed source has been discontinued or
source was caused by a one-time release of product or waste, however,
source continues to release product or conts into the environ-
ment; award 10 points per source
ENVIRONMENTAL U1.l EpBILrTY ASSESSMENT
A. Vertical Con#arr nt ivisgration _ Literature or well logs indicate that no confin-
ing layer is present above bedrock or above twenty feet below land surface:
award 10 points total
B. Horizontal. Cont:ar inapt Migration - Data or observations indicate that no dis-
charge points or aquifer discontinuities east between the source and the
nest do raclient d inking water supply, award 10 points total
Hydraulic Gradient Is Determined by (select only one
answer);
Calculations based on groundwater level measurements; award 10
points total
Observation of significant e/discharge features in the vicinity of
contarrairnt source and local topographic features; award 5
points total
Observation of local topographic features only; award 0 points
D. basting Groundwater Quality
l Analytical test(s) performed on groundwater sample(s) obtained from
site confirm presence of substances in concentrations exceeding Class
GA underground water quality standards; award 10 points total
2. Source(s) identified in Section IV constitute the only known source(s) of
con lion resulting in exposure or potential exposure identified in
Section II; award 10 points total
A
ED
Page 3 of 3
10/1/90
Points Award

Lab Report
From: NC Certification No. 402
SC Certification No. 99012
NC Drinking Water Cert. No. 37735
To:
July 25, 1995
Law Engineering
Attn: Mark C. Morgan
2801 Yorkmont Rd. Suite 300
Charlotte, NC 28.208
Project: Albermarle Sampling
F. Service Anapync1V & environmernal
The following analytical result a have been obtained for the
indicated sample which was submitted to this laboratory:
Sample I.D. AA35673 Customer Code: LAWENG
Login Group #: 9032A3 Customer Reference: ALBERMAR
Phone Number: [phone]/fax [phone]
Customer Sample I.D#: MW-1 ALBERMARL
Sample collection date: 07/24/95 Time: 13:10
Lab submittal date: 07/24/95 Time: 15:45
Received by: CP Validated by: ADO
Parameter: AROMATIC VOLATILES BY 602
Method reference: 602.
Result: see below
Date started: 07/25/95 Date finished: 07/25/95
Time started: Analyst: MJB
Unit:
Data for AROMATIC VOLATILES BY 602 ug/L:
ug/L
Component Name Result Component HDL
BENZENE 6 1
ETHYLBENZENE Not detected 1
IPE Not detected 5
MTBE 38 5
TOLUENE 1 1
XYLENES Not detected 3
Sample comments:
Project Name: Alberaarle San ling
If there are any questions regarding
Angela D. Ove
Laboratory Di
data, please cal
449 S,prungbrook Road P.O. Box 2'405 43 Chark rrt- NC : s224 -) 43

Lab Report
From:
To:
NC Certification No. 402
SC Certification No. 99012
NC Drinking Water Cert. No.
37735
July 25, 1995
Law Engineering
Attn: Mark C. Morgan
2801 Yorkmont Rd. Suite 300
Charlotte, NC 28208
Project: Albermarle Sampling
Fun Serv,Ce Ana)rtiCar & Ern.nrcrIrrental SUW1,0v,ti
The following analytical results have been obtained for the
indicated sample which was submitted to this laboratory:
Sample I.D. AA35674 Customer Code: LAWENG
Login Group #: 9032A3 Customer Reference: ALB AR
Phone Number: [phone]/fax [phone]
Customer Sample I.D#: NW-2 ALBERMARL
Sample collection date: 07/24/95 Time: 13:15
Lab submittal date: 07/24/95 Time: 15:45
Received by: CP Validated by: ADO
Parameter: AROMATIC VOLATILES BY 602
Method reference: 602
Result: see below
Date started: 07/25/95
Time started:
Data for AROMATIC
Component Mame
BENZENE
ETHYLSENZENE
IPE
MTBE
TOLUENE
XYLENES
Sample comments:
Unit: ug/L
Date finished: 07/25/95
Analyst: MJB
VOLATILES BY 602 ug/L:
Project Have: Albermarle Sampling
If there are any questions regarding t
Result
8400
1700
Not detected
1300
8000
9600
Component MIX
200
200
1000
1000
200
600
data, please call.
Angela D. Overca h
Laboratory Direc
449 Spriugbrook Road .... P.U. Box 240543 Charlotte, NC:28224-0543

1
1
Lab Report
From: NC Certification No. 402
SC Certification No. 99012
NC Drinking Water Cert. No. 37735
To:
July 25, 1995
Law Engineering
Attn: Mark C. Morgan
2801 Yorkmont Rd. Suite 300
Charlotte, NC 28208
Project: Albermarle Sampling
RIES, INC,
Servce Anaiyr.c2i Enyucnrre,qai
The following analytical results have been obtained for the
indicated sample which was, submitted to this laboratory:
Sample I.D. AA35675 Customer Code: LAWENG
Login Group #: 9032A3 Customer Reference: ALBERMAR
Phone Number: [phone]/fax [phone]
Customer Sample I.D#: NW-3 ALBERMARL
Sample collection date: 07/24/95 Time: 13:20
Lab submittal date: 07/24/95 Time: 15:45
Received by: CP Validated by: ADO
Parameter: AROMATIC VOLATILES BY 602
Method reference: 602
Result: see below
Date started: 07/25/95
Time started:
Unit: ug/L
Date finished: 07/25/95
Analyst: MJB
Data for AROMATIC VOLATILES BY 602 ug/L:
A Component Name
BENZENE
ETHYLBENZEHE
IPE
MTBE
TOLUENE
XYLENES
,11
-r
Sample comments:
Project Name: Albermarle Sampling
Result Component NDL
810 1
280 1
31 5
36 5
540 1
103 3
If there are any questions regarding this data, please call.
, Overc
Laboratory Director
449 SpritIgbrook Road P,O. Box-240543 Chartoite. NC 28224-0543

IY
EXPLANATION
APPROX. LOCATION OF
MONITORING WELL
REF: WATER TABLE.CONT
ALBEMARLE PLAZA
R AIAP, PREPARED BY SPATCO ENVIRONMENTAL„ DATED 1/22/93
LAW
ENGINEERING AN ENVIRONMENTAL
CHARLOTTE, NORTH CAROUNA
APPROXIMATE SCALE IN FEET
MONITORING WELL LOCATIONS
ALBEMARLE PLAZA
ALBEMARLE, NORTH CAROLINA
BYPRM
HECKED
A
NO.
3{E143--5-0190- D2
FIGURE

NPDES Permit Application
Plaza Pantry Phillips 66 Station
Item: 4, E. 6. Describe each type of treatment:
The groundwater treatment system at Plaza Pantry will utilize an Oil/Water Separator, an Ai
stripper, and Activated Carbon Absorption as methods to treat the groundwater.
Type
Size :
Sludge Capacity :
Separation Capacity:
Oil. Chamber
Effluent Chamber :
Design Flow
Description
Type
Size :
Air Volume :
Capacity :
Design Flow :
Description :
Oil/Water Separator
Cross Corrugated Plate Oil/Water Separator - coalescing Type
34" high x 31'" wide x 64" long
16 gallons
54 gallons
9 gallons
5 gallons
4 gpm
The Hydro -Flo Technologies Oil/Water Separator is a molded fiberglass
rectangular channel tank with supporting structure. The separation process
is fully automatic requiring no moving parts. The media pack provides 136
sq. ft, of coalescing surface area. the separator is designed for a flow rate
of 3-4 gpm but is rated for a maximum flow rate of 6 gpm.
Air Stripper
Stacked Tray Air Stripper using 4 trays
86.25" high x 31.5" wide x 82" long
120 CFM
20 gpm
4 gpm
The blower is a 2.5 HP single phase motor, a stainless steel mesh demister
prevents the escape of fluid particles with the exhaust air, Flow will begin
with contaminated water entering the top of the unit, then down and across
the perforated trays via gravity. Air is injected at the bottom of the unit
and passes through the perforations in the trays,

Type :
Size
Volume :
Pressure
Design Flow
Description
Carbon Absorption
Dual vessel carbon system
1" diameter x 36" high
200 Ibs, carbon
75 psi
5'gp
A dual vessel carbon absorption system using two high pressure fiberglass
vessels, Based on a flow rate not to exceed 5 gpm, this system would use
3=4 pounds of carbon per day, The vessels have a rna irum flow rate of
10 price The units use " F,P,T, inlet/outlet connections
Please find the manufactures specifications or the Chi titer Separator, Air Stripper along with
the stripper performance model which has been calculated for the specific contamination at this
site. The expected removal efficiency for BTEX contaminants is 99 999%, and for 1FF is
.63 % %. The MTBE concentration of 56 ppli after stage 4 of the Air Stripper will be polished
by the twin carbon cannisters.

11.41 AVM
V LX+;tf
H1 + ro-Flo Technolo n erinq S t oltio l io
205 E. Kehoe Blvd, Suite 2
Carol Streun1 IL 60188
[phone]
FAX: [phone]
12-07.1 £t85
COALESCING TYPE OIL/WATER SEPARATOR
Model DP 2 - F 34
1.0 EQUIPMENT SCOPE
1.1 The separator shall be a specially fabricated rectangular channel tank with
supporting structure, The separation process shall be fully automatic requiring
no moving parts. The design of the separator must satisfy the requirements of
API PUBLICATION 421. Feb, 1990 on DESIGN & OPERATION! OF OIL/WATER
SEPARATORS and Stoke's law. Performance enhancement must be achieved
by the use of DYNA-PAC cross corrugated coalescing media,
1.2 The separator must be designed to separate oilfrom wastewater meeting the
fallowing criteria:
A) Designed flow rate 7, 3 gpm
B) Specific gravity of the wastewaters aqueous phase = 1.0
C) Specific gravity of the oil phase = ,85
D) Oil droplet removal rate = 10 mg/I of oil droplets > 20 microns
E) Maximum allowable (dynar tic) viscosity of the wastewater
to be .0 115 poise
F) Media pack size to be 24 W x 12 D x 12 L (inches)
G) Maximum allowable wastewater temperature = 110 degrees F
H) Minimum projected surface area = 6e square feet
l) Minimum coalescing surface area = 136 square feet
J) Maximum cross sectional velocity = 0.80 ft/rnin ( 3 gprn
K) Minimum separation chamber retention time = 7.48 min 3 gpm
t..) Minimum sludge chamber capacity = t(0 gal
M) Material of construction = molded fiberglass

r V
HYDRO-F 0 TECHNOLOGIES, INC,
Mastering the Art of Oil/Water Separation
1.11120.4.0
DP255.534
EtP224-534
DP / R.253.4
4t DP160-534
DP120-534
DPO 96 S34
DP080-534
O DPC64,S34
DP048-534
DPD36-534
o13137773.
()Poi6.s34
GP012S34
amersql
Dp004.$14
opu02-634
Recommended Flow Rates For Typical Groundwator Rernodiaton
(BTEX) Projects (Trom 0 to 100 GPM)
111411.11MMI
(I,
F QW Rate
The above chart is to be used as a guideline for typical groundwater remediation applications. The recommendations
are base CI on removal rates of 20 micronsal the low end of the chart to 30 microns at the high end All calculations
9re based on oil with a specific gravity of 85, Please consult the factory for specialized sizing.
GP320,1:1,-4
DP256.534
DP224-534
f
DP/92..514
OP150-534
DP1—
25•534
UP346-534
OF'060 534
Lg:+664 S34
Recommended Flow Rates For Typical Groundwater Remedia on
(BTEX) Projects (from 10U to 640 GPM)
DP046-534
OPOM-S3,1
DP024-534
UPP16524
DP012-534
DP006.S34
DP004-534
DM:12..534 •
8
The above chart is to be used as a guideline for typical groundwater remediation applications. The recommendations
are based on removal rates of 20 microns at the low end of the chart to 30 microns at the high end. All calculations
are based on oil with a specific gravity of 85. Please consult the factory for specialized sizing.
"DI SERIES COALESCING TYPE
Cross Corrugated Plate Oil/Water Sepa

CHNOLOGIES, INC
dV1 TIIE ART OF QI LIWA'1'EK SEI'A ATIO,N
Tuesday, December 20, 1994
To our customers:
Enclosed are general arrangement drawings or each of our DP S ries molded fiberglass
iiiwater scparawrs. Also, given below as a guideline are recommended and rhammum tl©,o,rates
associated with each model, These flowrates are given only as a guideline, please use our tree software
to accurately determine the best sized separator for your needs. And as always. if you need any
assistance whatsoever, please do not hesitate to call Hydro -Flo to assist you,.
Model +e (mended Flowrate t'orTyni el MaximumFlawrate far Typical
t•uundwater ik;rnedtatfttn rroJecta kiraundwate.c.Reme.diatis►r► Prvieet5
DP-2 4 gpm
J" DP-4 8 gpm
Qr DP-8 15 gpm
DP-12 25 gpm
DP-16 30 gpm
" DP-24 50 gpm
DP-36 75 gpm
Sincerely,
Gus A. Constante
Sales Manager
6 gpm
12 gpm
25 gpm
38 gpm
52 gpm
78 gpm
100 gpm
205 E. Kehoe Blvd., Suite 2, Carol Stream, IL 60188
Phone: [phone] Fax:[phone]

1 I ...I
S LBS.
B40 L.
05 CAL
54 CM.
GAL,
Cott
CAL.
PINCCOALESCING SURFACE AREA FOR ULNA -YAA
ALE! :Cart AF P -
Mit* COALESCING SURFAut AREA rum utRA-P,"
SHIPPING WEIGHT
GMAT/NG WEIGHT
SLUDGE CHAMBER CAPACOY
EPARATION CHAMBER CAPACITY
CHAMBER CAPACITY
EFFLuENT CHAMBER CAPAPERY
AL SEPARATOR cmwar
POLYETHYLENE OIL ORLIN
STANDARD DRUM Bloc rtriiiite
qUTY MOUNTING FLANGE
ACULIS
INFLUENF TFLI5k.w.1 CK• m Bel
NFL Fk:
RATION z'...11AmBER
RE6104ABLE Pvr.: OVI4A-1FAx
EAvY :30TY GAS,KET, 0 sl*pED
rfLuLN1 NOR
LvENT SHEEN
EFFLUEN/ CHAmEE,4,
CYABLE LJO him 44.v.1IL ES
RoTAR y PIPE OIL 5 IK rWkE.
"E C.Is• C HAW(
,
11..V11.7.C.I.tt11;11;11;111t1.941,1tc..... c
1
3
14
I5 1
15 2
11 2
ld 2
iB 2
20
Ot :LEA
2-mc
• Z'o
/ ORAN 2-4
' YEN!. 2".
ESE Rv0PR INW,
RE 5EFTveiR WILL_ t nit
CLEARANCE REQUIRED FOR OYINIA
DYNA-PAK COALESCING
WAIN ROTARY PIPE SKIMMER
OWED FIBERGLASS CONSTRUCTION
OP- 002 GENERAL ARRANGEMENT ()WONG
I
L A R SEPARATOR
nP --G002 A.01

E-Z TrayTM
E-Z Stacker
Air
ripper's
ESHELMAN CAROLINAS, INC.
1127 Commercial Avenue
CHARLOTTE, NORTH CAROLINA 28205
[phone] FAX [phone]
�jlg
Night & Day

E-Z Stacker TM Air St
Hookup Requirements
Water Inlet ("A" on diagram)
Water Outlet ("8" on diagram)
Exhaust Outlet
Standard Power Requirements
TEFC Blower 460Y, 34ii (230/460-60-3)
Optional Power Reg
ipper
TEK glow, 1 phase (I I 5r230.60 1)
EXP Blower, 1 phase (230/460-60-3)
EXP, Blower, 3 phase (230/460.60.3)
dard Hookup
Model 1,4
Model 2.4
Model 1.4
I" FNPT
1,5" FNPT
PVC Soc.
1 HP: 3.2/1.6 Amps
1.4
HP; 9.815,2 Amps
1 HP, 3,2/1.6 Amps
N/A
iofl to Pipeline Centers (M
Dimensions (In inches)
A 8 H LW
68.38 25.38 75,25 45.60 15.50
68,38 2.5,38 75.25 53.60 26.50
The Tray Air Stripper
Standard HookupHook.up RequiremtStomma on Aral
Water Initt
Water Outlet
Blower Inlet
Exhaust Outlet
Waiter Site Gauge and Drain
Blower Horsepower
I Phase Blower Amps If 5/220V
3 Phase Blower Amps i§ 2301460V
Model 2.4
1.5" FNPT
2" FNPT
4'' PVC Soc.
3.5 HP
4
odel 2.4
2.5 HP
3 HP
4 HP
Oper Dry Wt F1ow Range
Wt. Per Tray pm)
110 Ibis 220 ibs 5 lbs 1.30
200 lbs 420 lbs 13 Has 1.20
Model 4,4 Model 8,4 Model 12.4 Model 16,4
2" FNPT 3'' FNPT b" FNPT 6" FNPT
3" FNPT 4" FNPT 4" FNPT 4" FNPT
4.5" FNPT 6.63" FNPT 6,63" O.D, Pipe 6 63" 0,D Pipe
4 5" O.D. Pipe 6 63" O.D. Pipe 6,63" 0,0, Pipe 6,63" O.D. Pipe
1" FNPT 1°' FNPT 1" FNPT I" FNPT
3 Hp 5 HP 7 5 HP 7.5 HP
34/I7A 56/28A 80/40A 80/40A
9,6/4/8A 15.2/7/6A 22/1 1A 22111A
Standard HoLocations to Pip3h Cantors
Dimensions (in
A B C D E F
Modal 4,4 13.38 13,38 4,13 4 4 13,38 28,5 30
Model 8.4 23.63 23.63 6,13 6 4 23,63 49 30
Model 12.4 35.63 23 63 61 3 6 4.5 4.7,63 73 30
Model 16.4 23.63 23.63 6,13 6 4.5 23.63 49 55
Oper DryWt. Flow Range
Wt, Per Tray (in gprn)
630 Ibs 985 lbs 29 Ibs 1-25
955 lbs 1,580 lbs 501bs 1-50
1,165 ibs 2,105 lbs 74 lbs 1-75
1,625 lbs 2,870 Ibs SO lbs WOO
Delivering the
New Standard in
Treatment
The Uplirne symbol stands
for.. , products designed to
give remcdiation project
managers what they need
most- fast startup, low C
cost, and sharply reduced
equipment downtime.
„systems organized into
integ-rated, 50Iu tions-fui
superior to 'one-cf.-a-kind
patchwork appmadies.
..„COMpreheiiive support
with
complete, easy -to -use
manuals
800-linc help from a
work. -group enabled
custorner service staff
that's the largest in the
industry
a nationwide tt.xchni.cal
sales force
J conrrols eng,ineered for
simple startup, smooth
operation, mi remote
dial -up trouble -shooting
certified 100% pre -ship-
ment performance testing
Call today for application
help, specifications, ur a quote
on any treatment building,
trailer, or equipment.
I -800-624-2026
Treatment Eqp ipmen front NitIED
PO, Rto, .1726, Ann krfw. N41 01106 USA
k-31:1.=.9,45-2c,47 1-AX 1-31 IA05-1170

The E:Z TrayAir Stripper
The F-7 Tray air stripper is designed for .maintenance not just contaminant
removAl. Pull out trays reduce routine maintenance time by up to SO%,
Benefits
The Choice for the Removal of VOCs
The E-Z Tray air stripper is a common sense and cost effective treatment
choice or volatile organic compounds. Other volatile contaminants may he
tripped after simulation at our in-house lab. Removal levels of 99.999% are
possible depending on constituents and unit configuration,
Simple Maintenance
A Unique quick-acces5 hatch allows removal of trays from the front of the
unit, unlike conventional units which require disassembling the unit to .clean
the trays, The E-Z Tray strippers require access only from the front, there-
fore no fittings need to he disconnected for routine maintenance. With tray
weights up to 80'0 less than for conventional units, servicing an E-Z Tray is
5tingle person task. No mechnical assists such as cranes are required,
Smaller Building Area Required
.E-L Tray air strippers are designed so all service is performed from the
front, eliminating the need for access aisles or overhead clearance around the
unit, 'Unlike conventional strippers which require four sided access to unclip
and Iift the sections, the E-Z Tray air stripper can be installed in tight areas
and backed into corners. Contractors report that the reduced space require-
ment, including less overhead space, for the tray air stripper saves 10-
40‘;.', on construction costs.
Flexibility of Connection Locations
Recognizing that the installation of air
sirippors on your site may be simplified
by modifying 'fitting locations, BioTrol
can provide any of its air strippers with
user specified fitting locations,
Theory of Operation
Air stripping 15 a physical process in
which volatile contaminants are trans
-
Trod from water to air.
Contaminated water enters from the
top of the unit and flows onto the first
several perforated trays. Water moves
across trays and from tray to tray via
gravity without the need for moving parts.
Air enters the bottom. of the unit and passes through the perforations in the
trays. The water flowing over each tray is subjected to intense aeration by
the air passing through the tray. Contaminants pass from the water intothe
air and are transported out ot the top of the unit.
Air for the system is provided by either a TER: or explosion proof blower,
A stainless teel mesh demister prevents the escape of fluid particles with
the exhaust air.
Treated water, which leave* the last tray, is collected in asump at the base
ol the unit,
"v• Pump Comrot
1uil
"ry
STANDARD PRODUCT
4 One Piece Shell with integral
sump
• Multiple Part Interior & Exterlo
Epoxy coatings
• Stainless Steel Tray:
• Stainless 5tter mem Demister
• Liquid Level Site Gauge
• Front Hatch Assembly
PRODUCT OPTIONS
• Blowers
• Spare Trays
• Pump Controls
• Additional Fittings
• Temp & Pressure Gauges
• Effluent Pump
• Water Plow Meter
• Pre -Piping
- Skid Mounting
• Control Panel
• Air Flow Meter
• Pre -Wiring
• Explosion Proof Motors
* Intrncay Safe Sensors
Pbh:ogisi ItaIrt ,
11.4t0h Hong
n. C mr:cOnn
73"
7" 4
Liquid L.4%c
Silz COuge
rh°3tti
1 ,
• 0:Lp:h&c D:mp,icr
sccom
ITV
Pow!' Tu.
1(2Bo4
NOTE: Model 16.4 hos two (2)
front access hatches. Custom units
can be bulk upon request.

,E-Z Stacker TM Air Stripper
The F-Z. StackerT" pair stripper pruves the nit
design on the market today. The 10 gprn Model 1.4 se
gpm Model 2.4 sells for $5,320,
e stripper
r '54,90(1, the 20
Benefits
High Removal of 'Volatile Organics
The E-Z Stacker air stripper removes vola(i1e organic compounds from.
water with low retention tunes. Removal levels of 99.999% are possible
depending on constituents and unit configuration.
Skid Mounted Unit for a Non-skid Mounted Price
The prig` of this skidinountec , sieve tray unit com..petes favorably even
ith diffused lair tank designs.
The FETE plastic base system comes with four tray°s and is pre -plumbed on a
coatvcl stee1skid. The clear PVC: site tube allows easy viewing of sump water
,uui provides a hirbulent-Free environment for the purnp level controls,
The 1 or 1.3 HP Cast'''' regenerative blower is integrally mounted, cx-
rr mely quiet, and requires no blower silencer. The blower comes complete
with inlet filter, bleed -off valve, and a drip shield, which prevents water
from entering the motor,.
Easy Maintenance Through Quick Disassembly
The unidue rnulded se clue, surfaces allow the
tray sections to ea ily stack onto one itnother,
while the convenient strap assembly secures the
unit. This design eliminates the need to snap
and unsnap latches as well as the possibility of
losing damping hardware, The sealing sur-
faces are located above the water level prevent-
ing the possibility of leakage which occurs in
3e me conventional nal air Stripper deli ;nr,.
All This and a Guarantee Toot
A 30-day money -back guarantee is provided. If
veaa.r`re not satisfied, return it!
Theory of Operation
Air stripping is a physical procc ss in which
volatile contijrtuitants are transferred from water
to air.
Contaminated water enters from the top of
the unit and flows onto the first of several per di trays. Water txtoves
across trays arid from tray to tray via gravity without the need for moving
parts,
Air enters the bottom of the unit Barad passes through the perforations in the
trays, The water flowing over each tray is subjected to intense aeration by
the air passim; through the tray,.Contaminants pass from the water into the
cair and arc transported out of the top of the unit,
Air for the system is provided by a TI';FC blower (explosion proof up-
tiona1}, A polypropylene mesh demister prevents fluid particles from escap-
ing with the exhaust air.
Treated water which lettves the last tray is collected in a sump at the base of
the unit. A gravity drain is standard.
STANDARD PRODUCT
▪ Plastic HDP€ Surnp and Tray
Sections
• Urethane Coated Steel Skid
Gast 3 Phase, TEFL Blower
• Clear PVC Liquid Level Site
Gauge
• Polypropylene Demister Media
• Explosion Proof High Sump
Level Switch
• Ba.se. Unit. Pre -plumbed to
Blower
PRODUCT OPTIC) S
• Effluent Pump Kit with Pump -
out Lever Controls
• Additional Tray ,S+ectiprr$
• Additional Meters and Gauges
• Control Panel wltntrinsically
Safe Sensors
• Explosion Proof Blower Motor
• Inlet Sample Port

Ca
ripper Performance Report for: CI -Number
Site: GEO Environmental
Flow (gpm): 4.0
Altitude (ft):
Stripper Model: 2.4
Contaminant
pate: Thursday, November 30, 1995.
Model version: 1.00b
Water Temp (F): 55.G
Alr Temp (F): 55.0
CFM:
120 0
influent Effluent Stgl St 2 St Stud St S Styli
(PPb) (Ppb)
Benzene 8400,00 1.00
Ethyibenzene 1700.00 29 00
Toluene (Methylbenzone) 8000,00 1040 00
p•Xylene 9604 0Q 530.00
Methyrl.ter•Buthyl Ether (MTBE)
1300,00 300.00 i94.31 2a1.70 124,21 ae,76 25.88 11.87
413 77 20.38 1 00 0'.05 0,40 0.00
5752 1,95 0,07 0.00 0=00 0a00
346 73 15 Q3 0 55 0Q03 0,00 0.00
41576 18.01 0.78 03 0.00 0 00
Copyright: ©1O 1rostrnent lqulpmbnt, P,O. Sox 3726, Ann Arbor,
Pi4QN[: 1400424.202B, In MI! 318.006.2647, PAX: 1-313-095.1170.

!
cE LOCA Tm
SYSTEM DISCHARGEPO NT
EXISTING CATCH BASIN
PONT OF DISCHARGE
FOR STORM SEWER
eeey«E:wS
hard surface.
S,c ,g Gdmy,
Qrdsurface
Fark8
ROAD CLAS 2 G C; 9 N
Lgh u\r road, hard or
GEO—.ENVIRONMENTAL
CONSULTANTS, INC.
a,TH }L p<v,� yw S& ETS1
ns• REAMES R0 CHARLOTTE, m a»w>v<
PHONE r. s!F f7 ) ««m
ALBS ARLE, N. C.
J5go32FC24
9S
DMA ws:SW-SERIES G«
PLAZA PANTRY
NPDES PERMIT APPLICATION
ALBEMARLE, NORTH CAROLINA
DISCHARGE PATHWAY Fot� E

SYSTEM DISCHARGE POINT
EXISTING CATCH BASIN
NG 18' RC
STORM SEWER
ALBEMARLE PLAZA
SHOPPING CENTER
DISCHARGE PATHWAY
TREATED DISCHARGE EXITS FACILITY
Q VOLUME TRAVELS 18©'± THROUGH PROPOSED
4'4 PVC DRAIN PIPE, TO DISCHARGE POINT
ENTERS CATCH BASIN BELOW GRADE.
VOLUME TRAVELS 275't THROUGH A SERIES
OF 18' RCP STORM SEWER DRAIN PIPES TO
POINT OF DISCHARGE FOR STORM SEWER.
VOLUME TRAVELS 920' ± IN A DRAINAGE DITCH
ALONG THE ROADWAY,
VOLUME TRAVELS UNDERNEATH ROADWAY VIA
A 54' CMP TO THE HEADWATERS OF MOUNTAIN
CREEK.
POINT OF DISCHARGE
FOR STORM SEWER
END OF ROADWAY DITCH
MP UNDER ROAD
GEO -ENVIRONMENTAL
CONSULTANT:„ INC.
f E)TEICHNICA4 /ENVIRO NMENTA ENGINEERS Se SCIENTIST;
11704 pE_MA,Cs IKCA0, CHARLOTTE, NC 2826963,
PHONE ( 01) 9G 6785 FAX [phone]
TO MOUNTAIN CREEK _.
SEE USGS TOPO MAP
PLAZA PANTRY
NPDES PERMIT APPLICATION
ALBEMARLE, NORTH CAROLINA
DISCHARGE PATHWAY f FIGURE
2

State of North Carolina
Department of Environment, Health and Natural Resources
Division of Environmental Management
512 North Salisbury Stet • Raleigh, North Carolina 27611
James G. Martin, Governor
William W. Cobey, Jr., Secretary
A. Preston Howard, Jr., P.E.
Acting Director
NO'I ICE OF INTENT
nal Pollutant Dischar -e Elimination System
Application for Coverage under General Permit NCG310000; Groundwater rem
designed to treat petroleum contaminated groundwater.
Name, Address , location., and telephone number of facility requesting Permit.
A. Official Name:
I_ Mailing Address:
(1)Street Address;
(2)City;
(3)State;
(4)Zip;
(5)County;
Plaza Pantry Phillips 66 Station
South Central Oil Company, Inc..
2121 West Main Street
Albemarle
North Carolina
28001
Stanly
C. Location. (Attach snap delineating general
(1)Street Address; NC H
(2)City; Albemar
North Carolina
(3)State;
(4)County;
Stanl
D. Telephone Number; (704 ) 982 - 2173
Facility' Contact:
A. Name;
B. Title;
C. Company Name;
D. Phone Number;
cation)
7 NC Hwy . 24`27
Banks. Garrison
Vice-Presiden
South Central Oil Company, inc..
(704) 982 - 2173
Application type (check appropriate selection):
A. New or Proposed; XX
B. Existing; If previously permitted, provide permit number
and issue date
C. Modification;
scribe the nature of the modification):
don projects
Description of discharge
A. Please state the number of separate disc
1,Pi; 2,[7; 3,E]; 4,1]; At
rots.
Page 1

B. Please describe the amount of wastewater being discharged per each separate discharge point:
1:4 3 2 °gallons per day (gpd) 2: (gpd) 3: (gpd) 4; (gpd)
C. Check the duration and frequency of the discharge, per each separate discharge point:
1. Continuous: Approx. 3-10 min. duration every 20 min.
2Inerinitt(pdesai1e):TraflSfer punrnirig from air striper
3, Seasonal (check month(s) the discharge occurs): January fkl; February Di; March IKJ; April
May FIJune 10; July 10; August f..A; September bd;Octobed k November kl; kJ
4. How many days per week is there a discharge?(check the days the discharge occurs)
Monday f(], Tuesday tq, Wednesday Thursday [Xl,Friday Exl, Saturday bd, Sunday
5. How much of the volume discharged is treated? (state in percent) 100 %
D. Describe the type of wastewater being discharged per separate discharge point. Specify what is
being removed and products recovered. This includes a listing of any chemicals found in
detectable amounts with the maximum observed concentration reported. The surnmary of
analytical results containing this maximum value should also be submitted (i.e. the listing, not
the graphical scan). The rnost recent sarnple must be no older than one year previous to the date
of this application. The following volatile organic compounds should be included along with
any suspected fuel additive;
1, flee -ene%
Please refer to Appendix A for
3. Toluene.% Etlayibenzene% response to this item.
4. Xylene%
5, Lead;
Methyl tert-butyIether (MTBE);
7. Dibromoethane (EDB);
8, 1,2-dichloroethane;
9. Isopropyl ether;
10. Naphthalene;
11. Phenol;
'(An EPA approved method capable of detection levels to 1 ppb sh.ouldbe used to detect these
compounds),
E. Fit7a5.2check the a.ppropPlate type of treatment being used to treat the groundwater;
1. Oil/Water Separator; XX
Air 5b-ipper; XX
3, Difhased Aeration;
4, Aca.vated Carbon Absorption; XX
Other(s • );
6. Separately, please describe in detail(size, volume,capacity, design flow through treaiuient,
etc.) each type of treatment that was checked in 1 through 5. Include, if any, the
manufacturer's information on each type of treatment. Also provide the removal efficiency of
each compound detected for the project, if known. Give design specifics (i.e. design volume of
each unit, materials used in air stripper, etc.). Existing treatment facilities should be
described in detail and design criteria or operational data should be provided(including
calculations) to ensure that the facility can comply with requirements of the General Perrnit.
Please include model and calculations used in determining the design requirements for the air
sb-ipper. Please refer to Appendix B and attached CAP Report
7, What are the well sizes and how many exist. 2 2" wells - See CAP Report
8. Please state the pump sizes and their location in relation to the treatment used in part 2,E.
9. Please explain what fail-safe measures, such as audible and visual alarms or automatic
shutoff systems, are provided to ensure no system failures. See Cover letter
10. Is there an access to the effluent for sampling?( either an open pipe or a valve to obtain a
sample) Yes
Page 2

NOTE: Construction of any wastewater treatment facilities require submission of three (3) sets of plans
and specifications along with their application.. Design of treatment facilities must comply
with requirement 15A NCAC 2H .0138. if construction applies to the discharge, include the
three sets of plans and specifications with the application.
5. What is the nature of the business applying for this permit. Petroleum Distribute r
Headwaters of
6. Name of receiving water or waters; Mountain Creek Classification:
(Attach a USGS topographical map with all discharge paint(s) clearly marked)
7. Is the discharge directly to the receiving water?(Y,N) No
If no, state specifically the discharge point. Mark clearly the pathway to the potential receiving
waters on the site map. (This includes tracing the pathway of the storm sewer to its discharge
point, if a storrn sewer is the only viable means of discharge.) See figures in Appendix C
. Please address possible non -discharge alternatives for the following options:
A. Connection to a Regional Sewer Collection System; Local system is at or near maximum
toxicity limit for system, not feasible.
B. Subsurface Disposal; Shallow water table; low permeable soils; would
further contaminate adjacent property; not feasible.
C. pra Iigatioa; Project site is in a highly developed area, with little
grassy area, mostly asphalt parking lots; not feasible
9. I certify that l am familiar with the information contained in the app
m kncw1e_ : e and belief such inform ation is true, complete, and accurate.
No
Any person who knowingly makes any false statement, representation, or certification in an)
application, record, report, plan or other document filed or required to be maintained under Article 21 or
regulations of the Environmental Management Commission implementing that Article, or who fa]s
tampers with or knowingly renders inaccurate any recording or monitoring device or method rewired to
be operated or maintained under Article 21 or regulations of the Environmental Management
Commission implementing that Article, shall be guilty of a misdemeanor punishable by a fine not to
e\cee 510 r '1. or by. imps s.or rrsent not to exceed siY: mnnth5, or by both. (18 t 1 S.C. Section 1O?ll provides
a punishment by a fine of not more than $10,O00 or imprisonment not more than 5 years, or both, for a
similar offense.)
l'rintr'd Naar of Parson Sig
Mr Banks Garri scan
VicPresident
T
AT;
Notice of Intent must be accompanied by a check or money order for $400.00 made payable to the North
Carolina Department of Environment, Health, and Natural Resources. Mail three (3) copies of entire
package to:
Division of Environmental Management.
NPDES Permits Group
Post Office Box 29535
Raleigh, North Carolina 27626-0535
Page 3

CORRECTIVE ACTION PLAN ADDENDUM
PLAZA; PANTRY PHILLIPS 66 SERVICE STATION
ALRE AR.I. E, NORTH +CAROLI r'A
Prepared For:
SOUTH CENTRAL TRA L OIL CONI \ ' \
2121 West \lain Street
Albania rle.North Carolina 2 001
PrepF
GEO-ENVIRONMENTAL CONSULTANTS, I +C"
04 Realties Road
l arl tt ,North Carolina 28269
Dece 1995

1.0 LIIVTITATION
TABLE OF CONTENTS
TENT
.0 INTRODUCTION
,1 Project Description d Site Location
2.2 Purpose of the Corrective< tzon Plan Addendum .
PROPOSED UPDATE TO CO' ' CTIVE ACTION N AN
System Update Overview d General Description
32 Conceptual al Design and Process Component Diagram fur Addittnt a.l Components
GrotmdwaterCollection and Treatment Sy term
Effluent.Discharge Piping y,sf
Basis of Selection and System Layout
3.4 perati n and Maintenance of System
APPENDIX A - Figure
APPENDIX - Gust Esti
ate
PAGE
6
6

1.0 LIMITATIONS
This Corrective Action Plan Addendum for the Plaza Pantry project site in Albemarle, North
Carolina, is for the exclusive use of the South. Central Oil Company and the North Carolina
Department of Environment, Health, and Natural Resources (NCDEHNR), The findings and
technical interpretations are specific to the area of investigation and are based upon site and
subsurface conditions that are included in the site assessment prepared by information that was
provided by others,. The project design activities have been performed in accordance with generally
accepted environmental and geotechnical engineering practices. If additional information becomes
available, or if there is a change in the current site conditions, we reserve the option to change or
modify the recommendations in this Addendum, No warranty, expressed or implied, is made by the
preparation of this CAP report.
This Corrective Action Plan Addendum r
performed under my direct supervision.
din, P
Project Engineer
p
v�=Tas prepared by me and the project word, was
I assisted in report preparation for this Corrective Action. Plan Addendum
J. Lee E; tton
Engineering Technician
ENVIRONMENTAL +.1LtL_r TAN'INC.

2.1 P
2.0 INTRODUCTION
ion and Site Locatio
The Plaza Pantry Phillips 66 Service Station project site is located at the intersection of Highway
24-27-73 and Highway 24-27 in Albemarle, North Carolina. (See Site Location Map, Figure 1 -
Appendix A) The project has been assigned Incident Number 6376, and is identified as the Plaza
Pantry Phillips 66 Service Station, Stanly County, North Carolina.
The Corrective Action Plan Addendum was prepared based on standards under 15A NCAC 2H
.0138. In addition, the requirements of the NPDES General Permit for the discharge of treated
petroleum contaminated groundwater, appropriate types of treatment, necessitate the additional
treatment measures.
2.2 Purpose of the Corrective Action Plan Addendum
This CAP Addendum report was prepared to address the addition of groundwater treatment
components, to comply with the requirement of the discharge permit, and remove contamination
present in the groundwater at the project site. The project site is considered low priority, therefore
no regulatory time frame has been set for corrective action. This CAP Addendum is submitted to
maintain compliance with NCDEHNR regulatory requirements for gasoline impacted project sites.
The primary purpose of this Addendum is to explain the treatment objectives of the proposed
treatment system and to provide engineering plans and details for the remedial action system
construction. To allow a timely completion of the CAP, Geo-Environmental Consultants, Inc. has
assumed that the findings developed during previous project activities are generally acceptable for
the engineering design of the Remedial Action System (RAS).
2

3.0 PROPOSED UPDATE TO CORRECTIVE ACTION PLAN
3.1 System Update Overview and General Description
The update to the system that is proposed for use at the Plaza Pantry project site is the addition of
an Oil/Water Separator and Activated Carbon Canisters to the groundwater treatment system. These
additions will consist of the following system components and phase approach to remedial action
Primary System Additions
The following is a description of the Updated Phase I groundwater recovery and treatment system
that is proposed for use at the Plaza Pantry project site:
A groundwater collection and treatment system as manufactured by QED Environmental,
The QED recovery pumps are designed with adjustable rates, pumping at a rate of 0.5 to
10 gpm.. The groundwater recovery system is also designed to control migration of
contaminated ground water. This was proposed in the CAP report.
An Oil/Water Separator unit, coalescing type of molded fiberglass construction, capable of
separating free phase product from the influent stream. The Oil/Water Separator satisfies the
requirements of API Publication 421, Feb. 1990 on Design and Operation of Oil/Water
Separators and Stokes Law. The Oil/Water separator is an addition to the system.
3. The QED tray aeration system is a self contained system that is designed to provide
treatment of a wide range of contamin.ant levels: Vapor enhanced recovery and air injection
systems will also be used to increase treatment efficiency. This was proposed in the CAP
report.
4. A carbon absorption system comprised of two high pressure fiberglass vessels. This dual
phase system will polish the remaining contaminants from the groundwater prior to
discharge. Each vessel contains 200 pounds of carbon and based on a flow rate not to exceed
5 gpm, will use 3-4 pounds of carbon per day. Carbon Canisters are an addition to the
system.
The proposed remedial action system has flow control systems connecting all system
components to ensure that the adequate liquid levels are maintained within the system
optimize the treatment of the ground water. This flow control system will also includes
warning lights and shut -offs to provide adequate protection if the system malfunctions.

Optional Sys Upgrade
The primary system is designed to allow flexibility in the routing of the process flow. All treatment
components will be equipped with flow control valves so that the optimum treatment conditions may
be developed. The flexibility and controls that are built into the system will allow the operator to
account for the variety of circumstances that may be anticipated from a package pump and treat
system and/or a soil vapor extraction/air injection system. The system will be upgraded if additional
treatment or containment is required.
3.2 Cone
ual Tiesi n and Process Comtnorient Diia ramF r a dditional Comrtorten
s
This section provides a description cfthe design of the additional treatment system components for
the Phase I primary system and the Phase II system upgrade. Each subsection will provide a
discussion of the following items for each system component:
• Description
• Operation and performance
• Maintenance and reliability
The process tow diagram and preliminary construction details for the updated system components
are as shown on Figures in Appendix A.
3.2a._l Groundwater Collection and Treatment System
The groundwater collection system will include two 2 inch QED controllerless recovery
pumps that will be installed in the existing monitoring wells MW-1 and MW-3. These wells
will now be identified as VERW-1 and VERW-3 respectively. Monitoring well MW-1 and
MW-3 are located in the center of the impacted area. The recovery pumps will be capable
of delivering a maximum flow of 10 gpm, but will be operated at a design flow of 0,5 to 1..0
gpm depending on the aquifer characteristics. The pumps will be powered by a piston air
compressor that is included as part of the remedial action system. Preliminary construction
details of the groundwater recovery system are shown in the Figures in Appendix A.
4

The overall basis of design for the recovery pumping system is to provide a medium flow
of impacted water that will cause the pump to go on and off frequently near the upper level
ofthe impacted groundwater. This type of cyclic pumping is designed to provide sufficient
drawdown to allow the transport of volatile organic contaminates and still develop a
"washing" action as groundwater rises and falls within the soil. matrix. Frequent cycle
pumping also decreases the potential for a large drawdown of the groundwater which
increases the migration of contaminants downward. The radius of influence for the recovery
system proposed is expected to be 20 feet and will be confirmed with a pilot study that will
be conducted using information developed within the first three months after installation.
Initial treatment of the contaminated groundwater is performed by an Oil/Water Separator
unit. The fiberglass tank is capable of separating free phase product from the influent stream.
The Oil/Water separator is equipped with high level alarms to prevent overflow%
The liquid storage tank that is included as part of the groundwater recovery system will
include high water and low water sensing systems that will be connected to the recovery well
to ensurehydraulic control of the system. The system then utilizes a modified tray aeration
to treat the groundwater. The stacked tray air stripper is a single phase, skid mounted unit
that will strip the contaminants from the water as it passes down through the perforations in
the trays while air is injected into the unit to further treat the water. The groundwater
collected in the holding tank of the tray aerator will be intermittently pumped to twin carbon
canisters for final polishing. The groundwater is then piped to the NPDES discharge point.
The proposed groundwater treatment system will meet the effluent discharge .requirements
of the NPDES General Permit for groundwater remediation projects designed to treat
petroleum contaminated groundwater.
The groundwater recovery and treatment system is expected to be a iow maintenance item
due to the limited amount of moving parts. Periodic maintenance may include cleaning the
5

trays within the tray aerator and/or replacement of the carbon canisters. The non-moving
parts of the system include the storage tank and oil/water separator that may involve biannual.
cleaning and/or replacement of gaskets and intake fittings. A diagram of the system process
components are shown in the Figures in Appendix A.
3.2.2 .Efflue 1 Discharge Piping System
To ensure that the contaminant plume is contained and controlled by the recovery well
system, the proposed system will route the effluent to a surface discharge point that is outside
the zone of influence of the recovery well. While this CAP and Addendum are being
approved, a NPDES General Permit is expected within several months after a Notice of
Intent application has been submitted.
As mentioned in previous sections, the Remedial Action System (RAS) may be modified slightly
in the future to provide the optimum treatment of the impacted soils and ground water. Some of the
system components may be taken off-line in stages depending on the contaminant levels in the
treatment area. The RAS components are designed with shutoff valves that will allow the removal.
of certain system components without adversely affecting the remaining system.
3.3 Basis of Selection and System Layout
The basis of selection for the system is provided in Section 4.2, Selection of Remedial Action
System. The primary reason the proposed system was selected was due to cost consideration. Other
reasons include the technical feasibility of the pump and treat technology for containment and
treatment of contaminant plumes and the ease in construction allowed by a package treatment
system.
The system layout is provided in the Figures in Appendix A and shows the location of the treatment
system and the surface discharge point. There is also a Figure that shows the specific treatment
components of the remedial action system.
6

.4 Operatt n and Maintenance of System
Guidelines for the system operation are provided in
from the equipment anufacturer and
�clude specific nstructions on the installation and start-up procedures The system is equipped with
simplified om off controld an emergencies shut-otf ifindividual sysem components m 1f ct n.
To ensure proper operation, the
be monitoredirnaintained weekly during tl
of operation and at bi-rnonthly inter al thereafteo
tanal inaintenanee, The hisannual ma
month
Twice a year the RAS will be shutdown for hi -
dude the changing of filters and fluids, and
spraying down system components to remove r Fa to product.
rAD CAP

BUILDING ENCLCUSURE -..
WELL HEAD
L rlowlE 5
COVERED
CONTROLLER -LESS
PUMP
RECOVERY WELL
TYPICAL FOR 2 WELLS
OIL/WATER
SEPARATOR -
GE I.IN010
SWITCH -
AIR SUPPLY 70
HAMMERHEAD PUMP
SURGE TANK
L- PISTON
COMPRESSOR
SURGE TANK
500 CALLON
DRAIN VALVE
PROCESS F
GEO-ENVIRONMENTAL
CONSULTANTS, INC,
OEOTECHNICAL/ENVIRONMENTAL EN IN£L'.RS
11704 REAMES ROAD, CHARLOTTE, NC 28269-7637
PHONE [phone] FAX [phone]
AIR
CILIA
TRIPPER
TWIN CARBON
CANNYSTERS
EFFLUENT' S&MPLE PORT
DISCHARGE 10
PVC DISCHARGE PIPING
RAM
PLAZA PANTRY
CORRECTIVE ACTION PLAN
ALBEMARLE, NORTH CAROLINA
GROUNDWATER RECOVERY FIGURE
TREATMENT SYSTEM 5

RESTROOMS BUILDING
SURGE TANK
TRANSFER
PUMP
oo-o— SYSTEM
CONTROLS
OIL WATER
SEPARATOR
VENT
ER)
(
—TRANSFER
PUMP
ToLINEF1LIER
MOISTURE
\ SEPARATOR
REMEDIATION BUILDING
( BY OTHERS )
4" PVC
DISCHARGE PIPING
L—EFFLOJEN1
SAMPLING VLAvE
oo TWIN CARBON
CANNISTERS
GEO-ENVIRONMENTAL
CONSULTANTS, INC.
GEOTECHNICAL/ENVIRONMENTAI. ENGINEERS Ac SCIENTIST
11704 REAMES ROAD, CHARLOTTE., NC 28269-7637
P6ONE [phone] FAx [phone]
TO NPOES
DISCHARGE POINT
\o— DISCHARGE PIPING
CONNECTION
UNDERGROUND
TRENCHING
PROJeCT it 950Gol PLAZA PANTRY
DArEo 8/17/95
ROICT MGR: CoilH, CORRECTIVE ACTION PLAN
)ES CoD,H
ALBEMARLE, NORTH CAROLINA
FIGURE
ScAtio AS SHOWN SYSTEM LAYOUT 7

/_
SYSTEM DISCHARGE POINT
EXISTING CATCH BASIN
CATCH RA
-- EXISTING 18' RCP
FOR STORM SEWER
ALBEMARLE
SHOPPING C
DISCHARGE PATHWAY
TREATED DISCHARGE EXITS FACILITY
j VOLUME TRAVELS 180'± THROUGH PROPOSED
4'+ PVC DRAIN PIPE TO DISCHARGE POINT
ENTERS CATCH BASIN BELOW GRADE.
VOLUME TRAVELS 275± THROUGH A SERES
OF 18° RCP STORM SEWER DRAIN PIPES TO
POINT OF DISCHARGE FOR STORM SEWER,
VOLUME TRAVELS 920' f IN A DRAINAGE DITCH
ALONG THE ROADWAY,
VOLUME TRAVELS UNDERNEATH ROADWAY VIA
A 54' CMP TO THE HEADWATERS OF MOUNTAIN
CREEK,
POINT OF DISCHARGE
FOR STORM SEWER
END OF ROADWAY DITCH
54 CMP UNDER ROAD _ j
GEO- ,NVIRONMENTAL
CONULTANTS, INC.
11704 RE, ES ROAD, f1
PHONE 0'04J596-87as FAX [phone]©
w AL/ENVIR4NmENEAE ENGINEERS ^.OGEE&VESTS d D
AM 1�A. , CHARLOTTE., NC r,!8�.�:9--7637 DRAWN
STALL
TO MOUNTAIN CREEK
SEE USGS TOPO MAP
PLAZA PANTRY
NPDES PERMIT APPLICATION
ALBEMARLE, NORTH CAROLINA
DISCHARGE PATHWAY FIGURE

A. System Ma
PRELIMINARY COST ESTIMATE
PRIMARY TREATMENT SYSTEM
1
allation Start-up
1. Groundwater Recovery System $ 15,'700.00
(includes Piston Compressor, Oil/Water Separator, Surge Tank,
Air Stripper w/ Control Panel, Twin Carbon Cannisters)
2. Groundwater Recovery Pumps, est. 2 @ $3,500.00 ............ . ....... $ 7,000.00
3, Air Injection Trenching and Piping, 170 If@ $7.00/lf ................. . $ 1,190.00
4. Well Heads
Vapor Enhanced Recovery, est., 2 @ $400.00 ..... . . . .. . ........... $ 800.00
Air Injection , est. 2 g $200.00 .... . ...................... . ..... $ 400.00
5. Soil Vapor Extraction System ................... . .. . .. , .... $ 4,200.00
(includes Compressor, Moisture Separator, In -Line Filter, and Blower)
6. System Installation, est..
Technician, 120 hours @ $80.00/hour . ..... . ............. . ....... $ 9,600.00
Project Manager, 20 hours @ $ 50.00/hour ...... . ........ , ....... , $ 1,000.00
Senior Project Manager, 10 hours a $65.00/hour ...... . . . .. . . ..... $ 650.00
7. Transfer Tank for discharge $ 500..00
8. Materials and Equipment Rental ............... . .... . .... . ......... $ 2,000.00
9. Electrical, Materials, Sub Contract, lump sum $ 6,500.00
10. Building ..... .................................. , .............. $ 8,000.00
ESTIMATED TOTAL ........ .
................................5 57,540.00
Maintenance and Operation (MONT
Treatment System Maintenance . . ..... . ...... .
Quarterly sampling of 7 wells @ $250.00/well,
four times per year (charged on a monthly basis
TOTAL. MONTHLY CHARGE . . .................. .
400.00
583.33
983.33

CO ECTIVE ACTIONPLAN
PLAZA# PANTRY PHILLIPS 66 SERVICE STATION
ALRL _ RLE, NORTH CAROLINA
Prepared For:
SOU TTI CENTRAL OIL COMP NY
1.
et.
Albemarle rle, No h C rolina 28001.
Prapared
GEE-L VIRONMENTAL CONSULTANTS, INC.
11'7 4 Readies Roo
Charlotte, North Carolina 28269

T TIO
1"his c�rr cti re Action Plan (CAP) f r the Plaza Pantry project site in lbenlarle, North Carolina
is fc r the exclusive use of the South Central Oil Company and the dearth Carolina Department nt of
P1 ronment, health, and Natural Resources (11C"L l l .) The findings and technical
interpretations are specific to the area of irivesti atia al and are based upon sine and subsurface
conditions that are included in the site assessment prepared by and; information that was provided
by others The project design activities have been performed in accordance with generally accepted
environmental and geotechnical engineering practices. if additional itaf rm bean becomes available,
sir if there is a change in the current site conditions, we reserve the option to change car modify f the
recommendations in this CAP. . No warranty, expressed or implied, is made by the preparation gat.
this CAP report.
s Corrective Action Plan r port tvas prepared by arte and the project work ova
direct supervision.
Christopher l : Hardin, P.P
Senior Project Engineer
1 asszsted in report preparatin fear this Corrective Action Plait,
,ce t tton
ngin ing Technician
p
fnic d tlndcr

TABLE OF CONTENTS
PAGE
1.0 INTRODUCTION . „ „...
1.1 Project Description and Site Location . 1
1.2 Purpose of the Corrective Action Plan
1.2.1 Source of Contamination . . . 2
1.3 Description of Site Improvements _ _ _
IA Summary of Previous Project Activities . .
1.5 Site Geology and Hydrogeology , . 4
1.6 Extent of Soil and Groundwater Contamination .
2.0 0 BJE CTIVES OF THE CORRECTIVE ACTION PLAN „ 5
2.1 Statement of the Goals of Correctise Action Plan .
. 5
2.2 Proposal for Terniination 7
3.0 CONTAMINATION EXPOSURE ASSESSMENT _ _ „ _ 12
3.1 Exposure Pathway Assessment 12
3.3 Toxicity and Persistence of On -site Contaminants . . . 13
3.3 Biodegradability,. Fate and Transport of On -site Contaminants . 13
4.0 EVALUATION OF MEDIAL ALTERNATIVES . „ , 14
4,1 Focused Feasibility Study of Remedial Alternatives 14
4,1.1 Pump and Treat Technology
4.1,2 Excavation and Treatment . 16
4.1.3 Air Spargitig . 16
4.1.4 Vapor Enhanced Recovery . 16
4.1.5 In -situ Biorernediation . . 17
4.1.6 No Action Taken , _ — _ _ , 17
. 15

TABLE OF CONTENTS
(Cont.)
4.2 Se Selection of Remedial Action System
5.0 PROPOSED CORRECTACTION PLAT
5.1 System Overview and General Description .
5.2 Conceptual Design and Process Component Diagram
5._ Grramdwater'Co1lection and Treatment System
;.? Vapor Enhanced Recovery System
5. Air Injection System .. , ...
5.2.4 Effluent Discharge Piping System ..:.....
5.3 Basis of Selection and System Layout
5.4 Operation and Maintenance of System
6.0 MONITORING, SYSTEM EVALT.UATIT N AND REPORTING
6,1 System Start-up Schedule
6./ System Start-up Procedures .
6,3 Sampling and Monitoring Plan
6.3,1 Groundwater Monitoring ,
6,3.2 Treatrn:ent System Monitoring
..... . ....... .
6.4 Troubleshooting and Evaluation of System Ftfecti\ eness
6.5 Recommended Requirements for Site Closure ... , . .
APPENDIX A
APPENDIX
APPENDIX
APPENDIX
PAGE
17
18
18
19
.0
23
7.4
24
4
5
26
27
Site Location 1 1:ap, Site Pl , Process Flow and Construction Details
Cost Estimate
Comprehensive Site Assessment Data
Corrective Action Plan Certification

1.0 INTRODUCTION
1.1 Project Description and Site Location
The Plaza Pantry Phillips 66 Service Station project site is located at the intersection of Highway
24-27-73 and Highway 24-27 in Albemarle, North Carolina (See Site Location Map, Figure 1 -
Appendix A), The project has not been assigned an Incident Number at this time, but it is identified
as the Plaza. Pantry, Stanly County, North Carolina.
This CAP was prepared based on information in the Comprehensive Site Assessment developed by
SPATCO Environmental Services in February 1993 and other information. According to the results
of the CSA the total BTEX concentrations discovered on the site exceeded the Water Quality
Standards established in 1 SA NCAC 2L regulations. In addition, based on information provided by
the CSA and a review of the NCAC 2L Standards Section .0201, the groundwaters at the Plaza
Pantry project site would classify as Class GA waters.
1.2 Purpose of the Corrective Actin Plan
This CAP report was prepared to address the soil and groundwater contamination present at the
project site. The project site is considered low priority, therefore no regulatory time frame has been
set for corrective action. This CAP is submitted to maintain compliance with NCDEHNR regulatory
requirements for gasoline impacted project sites.
The primary purpose of this CAP is to explain the treatment objectives of the proposed treatment
system and provide engineering plans and details for the remedial action system construction. To
allow a timely completion of the CAP, Geo-Environmental Consultants has assumed that the

findings developed during previous project activities are generally acceptable for the engineering
design of the Remedial Action System (RA.S). This CAP will provide the following:
Explanation of goals and objectives of theediation
Proposal for target clean-up concentrations
Construct' n details for the Remedial Action System
Operational characteristics and guidelines
Listing of required permits and approvals for disposal o
the waste materials and effluent
Follow-up monitoring plan
Guidelines for evaluation of the effectiveness of the Remedial Action System
Source f Contamination
The contamination at the Plan. Pantry project site i believed to have occurred in the product
line area of the project site. Previous reports document that the release occurred on or about
August 2y 1990.
In addition to the GSA conducted by SPATCO, a site investigation was performed by Law
Environmental in June, 1.990 on the adjacent fleet National Bank property to determine. if
contamination had migrated off site. This site investigation revealed that the NCA.0 2L
Standards for gasoline related contamination had been exceeded in the groundwater beneath
the adjacent property site. Gasoline contamination is present in adjacent monitoring wells
MW-1, MW-2, and MW-3 which are located downgradient from the Plaza Pantry site,
As previously stated above the classification of the affected groundwater is Class GA
according to NCAC 2L. The previous groundwater data submitted by Southern Pump and.
2

Tank Company Environmental Services Division (SPA- CO Environmental) indicated
gasoline constituents above the 2L Standards as shown in the table below:
TABLE 1
AI I TRY P�PI�LlPS i 8
u d at eI � avc the
Benzene
Toluene
Ethylbenene
Xylenes
MTBE
17,400
17,400
2,180
11,800
<1,000
2L Standard
(PPb)
1 ppb
1,000 ppb
29 ppb
530 ppb
200 ppb
1.3 Description of Site Improvements
The Plaza Pantry project site is located at the Albemarle Plaza Shopping Center east of downtown
Albemarle, North Carolina. The improvements at the project site consist of a store building with
gasoline pumps on two opposite sides of the building, and a detached restroom building. The
majority of the property is covered with asphalt and concrete. Highway 24-27-73 and Highway 24-
27 Bypass form the Northern and Western boundary of the property.
1.4 Summary of Previous Project Activities
Preliminary- contamination assessment measures, performed by Law Environmental under contract
from Fleet National Bank, investigated the potential off -site contamination of the adjacent property
included the installation of three groundwater monitoring wells (MW-1, MW-2, MW-3). Later in.
the Phase 11 contamination assessment five additional monitoring wells were installed at the adjacent

bank property (MW-4, MW-5, MW-6, MW-7, M'Gw'-8). it is our understanding a release of
petroleum hydrocarbons was reported to the North Carolina Department of Environmental Health
and Natural Resources (NCDEFINR) Mooresville Regional Office on August 2, 1.990.,
SPATCO Environmental installed four groundwater monitoring wells at the Plaza Pantry site as
well as performing a series of soil borings as part of the Comprehensive Site Assessment for the
Plaza Pantry Phillips 66 Service Station. The additional groundwater wells (MW-9, MW-10, MW-
11, MW-12) showed no free product. The soil borings were screened in the field using an Organic
Vapor Analyzer (OVA). Based on the OVA readings, approximately 1,000 cubic yards of
contaminated soil was excavated and removed from the site. The depth of the excavation was
approximately three to five feet blow grade. The soil was stockpiled at the Brookwood Industrial
Park, on plastic and contained with hay bales.
Previous reports that have been submitted to the NCDEHNR Mooresville Regional Office include
a Comprehensive Site Assessment, and a current well survey map of the project site. As required
by the NCDEHNR requirements for CAP reports, the figures from the CSA report prepared by
SPATCO Environmental have been included in Appendix C for your reference.
1.5 Site Geology and Hydrogeology
The Plaza Pantry site is located in the Carolina slate belt Lithotectonic Belt of the Piedmont
Physiographic Province. The Piedmont Plateau Province is located over approximately 20,000
square miles in the state of North Carolina and lies between the Coastal Plain Provinces to the east
and the Blue Ridge Province to the west, Topography is characterized as a plateau dissected by
stream erosion into rounded hills and valleys. Elevations within. the Piedmont Plateau vary from
approximately 400 feet above sea level in the east to as much as 1,800 feet above sealevel near the
foot of the Blue Ridge Mountains to the west. Test borings indicate that the underlying bedrock at
the project site consists of gray and brown -gray Moderately hard to hard Metamudstone.
4

1.6 Extent of Soil and Groundwater Contamination
Soil hydrocarbon contamination was indicated by the field screening using an OVA on soil samples
collected during the Comprehensive Site Assessment. The CSA revealed soil contamination in the
vicinity of the previously excavated ust area. Soil test boring records from MW-1,, MW-3.„ MW-6,
and MW-12 indicated petroleum odors in the soil samples examined..
Ground water analytical data from the twelve permanent monitoring 'wells indicates hydrocarbon
compound concentrations in excess of North Carolina DEHNR Water Quality Standards in two of
the on -site monitoring wells. The maximum hydrocarbon contamination reported was 54„700 ppb
total BTEX in M.W-3. For additional information reference the BTEX contour map and geologic
cross sections from the CSA report in Appendix C.
2.0, OBJECT1 'ES OF THE CORRECTIVE ACTION PLAN
2.1 Statement of the Goals of the Corrective Action Plan
The overall objective of the groundwater remediation at the Plaza Pantry project site is to eliminate
the potential of any present or future threat to human health or safety posed by the petroleum
hydrocarbon impacted groundwater and soil. It is also the objective of the NCDEHNR groundwater
policy to restore groundwater quality to the level of the NCAC Title 15, Subchapter 2L water quality
standards, or as close as is economically and technologically feasible.
The primary goal of the remediation at the Plaza Pantry Phillips 66 Service Station site is the
prevention andlor elimination of threat to human health or safety due to petroleum impacted
groundwater. The primary exposure pathway from the site is through exposure to vapors through
5

wells or subsurface structures. This exposure pathway is not considered a potentially critical
pathway since there are no basements in the immediate vicinity of the project site and all areas
within 1,500 feet of the site are connected to public water supply.
A secondary goal of the CAP is to prevent future ground water impact due to contaminants
migrating into the adjacent soils and/or fractured bedrock aquifer. The proposed remedial action
system is designed to provide adequate groundwater recovery flow rates to contain and control the
migration of the contaminant plume. At the same time the system is designed to be modified as part
of a system upgrade if additional containment of the subsurface groundwater is necessary to prevent
migration of contaminants.
The final goal of the CAP will be to decrease the level of the contaminants in the soils and ground
water at the Plaza Pantry site to as close to the 2L Standards as is economically and technologically
feasible.. Based on our review of currently available EPA literature, our understanding of past
experience on North Carolina remediation projects and our evaluation of the soils data, it is our
opinion that there is a low probability of restoring the contaminated ground water to the 2L
Standards. The 'medium to low ,permeability soils at the Plaza Pantry site present unique problems
in meeting the 2L Standards due to the current limits of remediation technology in dealing with
contaminants adhered to fine-grained soil particles. This CAP report provides information on a
remedial action system that will attempt to achieve the target levels listed in the 2L Standards, but
it is anticipated that levels slightly higher than the 2L target concentrations will be attainable with
currently available remediation technology. The levels of total BTEX contamination established
by the CSA along with the expected maximum treatment level concentrations possible after the
completion of remedial activities proposed in this CAP are provided below in Table 2.. Due to the
subsurface considerations, this CAP proposes an innovative approach to providing a more rapid and
cost effective clean-up that is based on a balanced consideration of all the factors involved including
technologic and economic feasibility, risk assessment., and the existing NCAC 21_, Standards.
6

Benzene
benzene
Toluene
BTEX
MTB E
2.2 Pronosai for Termination.
17.400
2,180
17,400
.800
48,780
<1,000
50
40
250
400
700
100
29
1.000
530
1,560
200
In the development of this proposal for the termination, GC' has carefully considered the following
items that will influence termination of remedial action at the Plaza Pantry project site:
The impacted ground water at the Plaza Pantry site is located in medium permeability soils
and in localized fractures in the siltstone soils/fractured bedrock. The cation exchange
capacity of these type of soils and groundwater flow rate will significantly reduce the amount
of reduction in the concentration of contaminant that may be achieved.
According to the 2,L Standards (0.01, 06 (n)) theDirector may authorize the discontinuance
of remedial action to restore groundwater quality to the 2L Standards, if the responsible party
provides adequate demonstration that additional remediation may not result in a significant
reduction in contaminant levels. This may include submission. of a passive biodegradation
corrective action plan in accordance with :0106(k) at a future date.
7

The proposed Phase 1 remediation technology of small scale pump and treat and vapor
enhanced recovery is designed to provide initial remediation and contaminant containment
at the project site. If additional containment and/or remediation of the groundwater
contaminant plume is determined to be necessary by the NCDEHNR, then a system upgrade
will be implemented. The system may include additional recovery wells and/or a vapor
extraction system,.
4. This CAP proposes treatment of the groundwater beneath the project site to the target
concentrations required by the NCAC 2L Standards. At the same time it is expected that
these concentrations will not be able to be achieved even with the best available technology.
After several years of treatment, it is expected that an alternative treatment plan will need to
be prepared in accordance with 2L, ..0106, (k), (1) or (rn) and submitted to the NCDEFINR
for approval. The (k), (1) and (rn) subparagraphs ofNCAC 2L, .0106 provide for alternative
treatment measures that are based on an equal consideration ofenvironmental, human health,
and economic considerations.
Groundwater remediation has proven to be a long and expensive process, with very few sites having
reached final closure. Due to the cost of previous site characterizations, it appears that the
Commercial UST Trust Fund will ultimately provide funding for the remediation at the Plaza Pantry
project site. This CAP proposes that it would he in the best interest of the State to allow a
conservative remedial action program in which termination of active remediation is allowed and
expected before the 21._. Standards are reached, The termination of the active remedial action
program would be allowed in stages based on the results of analytical testing of the ground water
and interpretation by qualified technical personnel. The transfer of treatment methods to non -active
remediation will require submission of an alternative Corrective Action Plan prepared in accordance
with NCAC 2L, .0106, (k), (1) or (m) at a future date.
Based on a review of the existing EPA literature on remediation in tine grained soils, the results of
previous field activities, and the soil properties at the site we propose the following remediation
termination schedule:
Removal ofPump and TreatActive Remediation System - The pump and treat treatment
system may be shut down when the treatment system has been in operation a minimum of
two years and the le-vels show less than a 10 percent quarterly decrease in the influent
contaminant levels within the treatment area for the Method 602 constituents. The
determination to shut down the system will also be determined by the level of the petroleum

constituents and/or the level of contaminant remaining in the project area in conjunction with
interpretation by qualified NCDEHNR technical personal. The expected level of remaining
BTEX concentration following the pump and treat remediation would be expected to be 700
ppb or less after a period of two years. It is important to note that the initial target
concentration will be the 2L Standards until an alternative/revised CAP is submitted.
Termination of treatment using the active pump and treat system would involve transferring
the remedial action system to a passive system by submitting a revised CAP report in
accordance with subparagraphs .0106, (k), (1), or (0m).
Termination 0f Vapor Enhanced Recovery System - Termination will occur When adequate
demonstration has been provided that the continuance of corrective action would not result
in a significant reduction in contaminant levels. This demonstration would include providing
a contaminant reduction curve that has an asymptotic slope with a ratio of less than 1:40 for
the Method 6.02 constituents within the treatment area for four consecutive quarterly
intervals. It is anticipated that the BTEX concentrations at the end of these four quarterly
readings using a vapor extraction system would be 700 ppb or less.
Transfir to - Passive Pip adation Plan - The site will be transferred to a passive
biodegradation plan after the active system has been out of service for one year and the,
groundwater monitoring shows no increase above the levels described, in Item Nos, 1 and 2
within the treatment area for the Method 602 constituents for one year. As part of the
requirements for closure, the surrounding monitoring wells at or near the compliance
boundary will also have to indicate steady state levels for the Method 602 constituents,
The remediation termination schedule described above may require that South Central Oil petition
the NCDEHNR for a reclassification of the impacted ground waters at the Plaza Pantry project site.
This petition for reclassification will be applied for at a future date after the degree of success of the
remedial efforts has been evaluated and a alternative passive CAP has been submitted. The
monitoring results obtained during the operation of the system will provide some of the most
accurate data available to evaluate the technological and economic feasibility of continuing or
discontinuing treatment. For purpose of reclassification, the compliance boundary will be defined
as the property line surrounding the Plaza Pantry project site or at another mutually agreed upon
distance from the area of contamination.
9

It is our understanding that the NCAC 21, regulations will allow a reclassification of the ground-
water andlor the termination of active remediation at the Plaza Pantry project site subject to the
approval of the Director. This reclassification would require the following in addition to the items
described above:
A discussion of the duration of the corrective action.
A description of the compliance boundary and surrounding soil and
groundwater co.nditions, and exposure pathways.
Evidence that public notice has been provided to adjacent property
owners.
Evidence of the serious financial hardship that would be incurred by
the applicant.
Since the project will be Trust Fund reimbursable, it will be in the best interest of the State to assist
in the development of treatment goals that are based on sound technical principles. The procedures
recommended above will help ensure that South Central Oil Company and the State Trust Fund are
not investing their limited financial resources in trying to attain treatment goals that are not
technically or economically feasible. An important partof evaluating the economic feasibility of
the treatment goals will be to develop a cost/benefit ratio based on the cost of the remediation
system. To provide an preliminary estimate of the cost of the system, GC1 has developed a cost
breakdown of the proposed remedial action system including installation, operation and maintenance
costs. This breakdown will be used to evaluate the longtefin economic feasibility of operating the
treatment system and is provided in Appendix B.
10

LAZA PANTRY P I I.IP ' 66 SERVICE STATION
10N START-UP ANL) COMPLETION SC II D
Submittal of Permit application for
discharge of pump and treat
system to sanitary sewer
Installation of the pump and treat
recovery system
Addition of recovery pumps
and/'or vapor extraction system
Termination of active rerarediation
with groundwater recovery system
Longterm Monitoring
Groundwater
d Comp! eon IIt+
October 1995
After receipt of Approval of
CAP from NCDE;IINR.
If the initial groundwater
recovery system does not
contain contamination plume
Estimated 2 to 4 years
In Process
Tentative
October 1995
Future addition if
required by
NCDE;ITNR - MRO
May require submittal
of revised passive CAP
in accordance with
NCAC 2L, .0106 (k),
(1), or (rn)
For an estimated 6 years after Future requirement if
acceptance of passive CAP by revised passive CAP is
the NCDEIINR accepted
11

3.0 CONTAMINATION EXPOSURE ASSESSMENT
osure Pathwav Assessmen
Groundwater within the Piedmont region of North Carolina generally moves from topographically
high areas to topographically low areas within and along stream valleys. The movement of
groundwater through overlying saprolites is strongly influenced by this topography which typically
controls the location of recharge and discharge areas. The soil conditions at the Plaza Pantry Phillips
66 Service Station site generally consist of medium to low permeability silty clays or clayey silts
which characteristically achieve relative pemieabilities of 0.01 ft/day INith the apparent groundwater
flow in the east to northeast direction and/or toward other localized site feature such as stream beds.
Surface water was observed to be .normally present along the eastern boundary of the site with an
apparent hydrogeologic connection between shallow groundwater and the adjacent stream bed.
Based on a review of the information provided in a recently completed well survey, it is our
understanding that all properties within a 1/4 mile radius are able to be served by public water and
sewer systems. Potential receptors within 1,500 feet radius do not exist since there are no wells,
basements, or subsurface structures which could be impacted by gaseous phase benzene in the area.
No subsurface structures are thought to be at risk. Several businesses and private residences are
within 1500 feet of the site. Population density is considered moderate,
The exposure risk assessment of the expected contaminants at the Plaza Pantry project site was
primarily limited to an evaluation of exposure pathways since the effects on human health and the
environment for petroleum related contamination are widely known. The acceptable level for human
health and the environment was assumed to be the NCAC 2L Standards for groundwater located at
the compliance boundary of the project site.
12

3.2 Toxicity and Persistence of On -site Contaminant
The toxicity assessment for the gasoline related constituents present in the ground water beneath the
Plaza Pantry project site was developed using information from the Material Safety Data Sheets
(MSDS) and the NIOSH Guide to Chemical Hazards. The four primary constituent of concern that
are present in the groundwater at the site are benzene, toluene, ethylbenzene, xylene, and MTBE.
The following section provides a description of the toxicity and general hazard characteristics of the
BTEX constituents, in gasoline:
Benzene - ingredient making up 5 percent of gasoline is classified as a carcinogen by OSHA,
NTP, and IARC. Benzene causes anemia and other blood disorders after repeated and/or
prolonged exposures through ingestion andlor dermal exposure. Kidney and liver darna.ge
is possible from long term exposure to benzene.
Toluene - ingredient naturally occurring in gasoline which is clear, colorless, non -corrosive
and flammable. Toluene is not carcinogenic to humans as determined by US -OSHA and the
US -EPA. When ingested toluene causes .mild to moderate depression of the central nervous
system (mild fatigue, weakness, confusion, lacrimation and paresthesia).
Ethylbenzene - ingredient naturally occurring in gasoline which is clear, colorless, and
:flammable. Exposure to ethylbenzene can cause headaches, sleepiness, eye and skin
irritations and difficulty with breathing, but is not considered to be carcinogenic to humans.
Xylenes - refers to a mixture of three isomers; ortho (0), meta (M), and para (P) which have
varying densities and boiling points. The xylenes are clear, colorless, flammable,
noncorrosive liquids that can cause headaches, vomiting, nausea, abdominal pain, irritability,
dizziness, and slowed reaction time. The xylenes are not considered to be carcinogenic to
hum an.s
3.3 Biodegradability, Fate and Transport of On -site Contaminants
Based on information provided in the Pollution Control Engineer's Handbook and our recent
experience on other project sites, it is our opinion that the primary gasoline related constituents (i.e.
benzene, toluene, ethylbenzene, and xylene) present in the groundwater beneath the site are readily
biodegradable if the proper oxygen, nutrient, and pH balance is present, The hydraulic conductivity
for the site was determined by performing a slug test, then evaluating the data using the Bower and
13

Rice Method. Monitoring we11 MW-12 indicated a calculated hydraulic conductivity of the
subsurface soils to be 9.6 ft. / year or 0.026 ft./ day .
The potential for biodegradation and. the estimated flow rate within the subsurface soils suggest that
the proposed RAS will be suitable for containment and partial treatment of the on -site gasoline
contaminants. Due to the limited understanding of the subsurface conditions it is not possible at this
time to determine the longterm fate and transport of the on -site constituents. This CAP is designed
to provide additional inforrnation about the subsurface soil, groundwater and biodegradation
conditions. The CAP also provides for a system upgrade or downgrade depending on the results
developed during the operation of the on -site treatment system.
4.0 EVALUATION OF REI'I_EDIAL ALTERNATIVES
4.1 Focused Feasibility Study of Remedial Alternatives
In order to develop the most cost effective and environmentally sensitive design, GO conducted a
focused feasibility study to determine the m..ost. applicable treatment alternative for the Plaza Pantry
project site.. The soil and hydrogeologic conditions at the Plaza Pantry site present several conditions
that will provide difficulties for all treatment alternatives. The following is a summary of the site
conditions that were considered during the selection of the most feasible treatment alternative;
Medium permeability soils and bedrock (i.e., less than 1 x .10' cm/sec) are present in the
treatment area. This site condition will require a system that provides adequate treatment
and/or containment of impacted ground water.
2. Intermittent preferential flow pathways appear to be present in the silty clays and fractured
siltstone soils within the treatment area. This condition may allow the transport of petroleum
contaminants to deeper sections of the siltstone if high rate recovery pumping is utilized.
14

3,, isolated pockets of high level contaminants appear to exist with the soil matrix and will have
to be carefully monitored to avoid overwhelming the treatment system or causing a potential
explosion hazard. The following sections provide a brief description of each alternative that
was considered during the preparation of the CAP. In addition to the site conditions listed
above, economic feasibility, citizen acceptance, reliability, and maintenance were also
considered.
4.1.1 Pump and Treat Technology
This treatment technology involves the removal of contaminated ground water with recovery wells
and subsequent treatment through a carbon canister system, stacked tray aerator or bioreactor. The
effluent from these systems are typically discharged into a nearby sanitary sewer system or to an
NPDES discharge point. This is the primary type of treatment system that: has been utilized for
remediation of the majority of impacted ground water sites to date in the .environmental industry.
Typical pump and treatment technology relies heavily on the washing action of the ground water
through the soil matrix to remove contaminants. Review of literature from the US -EPA and our
experience on other projects indicates that the expected very low flow rates that would be generated
in the medium permeability soils at the Plaza Pantry site could make the typical pump and treat
process slow and expensive. In general, typical pump and treatment technology is positive for the
containment of a contaminant plume, but there it will be necessary to use intermittent pulse pumping
to increase the amount of contaminant removal. A low flow rate groundwater recovery system with
a tray aerator groundwater treatment system was determined to be acceptable for the Plaza Pantry
project site if adequate provision is made to increase the rate of contaminant removal through pulse
pumping. The approximate cost for this system based on project specific remediation requirements
and previous systems with similar designs would be $15,000.
15

4.1.2 Excavation and Treatment
This alternative would involve the removal of impacted soils and ground water in the area of the
Plaza Pantry project site. This alternative was exercised during tank removal activities and further
excavation is not considered productive or economically feasible at this time due to the limited
amount of soil contamination located above the groundwater table.
4.1.3 Air Sparling
This a
ative involves the injection of high pressure and low volume air below the water table to
volatilize petroleum constituents and encourage bioremediation through the stimulation of natural
microbes in the soil and ground water. Air injection is most often used in conjunction with vapor
extraction (WE) wells that allow the removal of volatile and semi -volatile contaminants from the
vadose zone of the treatment area. This is considered a potentially feasible alternative as to enhance
the biodegrading activity in the groundwater would be increased for an approximate cost of $5,000.
4.1.4 Vapor Enhanced. Recovery
Vapor enhanced groundwater recovery wells that allow the removal of Tolatile and semi -volatile
contaminants from the vadose zone of the treatment area that occurs when the recovery wells are
pumped. This remedial alternative has been used with success in primarily sandy and silo' soils, but
it is considered a potentially feasible alternative for silty and clayey soils if adequate provision is
made to account for low flow rates and the presence of preferential flow channels. Low permeability
soils, such as silty clays, may limit the rate of treatment and require that recovery wells be spaced
at closer intervals. Through application of a vacuum, vapors are removed from the groundwater
extraction wells screened in the vadose zone, This in turn induces air flow through the vadose zone
to the extraction well which acts as a sink for contaminated vapors. This is considered a potentially
feasible alternative with an approximate cost of $7,000 would need to be combined with
groundwater pump and treat.
16

4,1..5 In -situ Biorem.ediation
This alternative would involve a combination of techniques to increase the amount of remediation
through in -situ biodegrading activity°. For sites the size of the Plaza Pantry site the most probable
bioremediation option is the use of a closed loop groundwater recovery and re -injection infiltration
gallery. This type of system would remove the impacted ground water, then treat it in an above
ground bioreactor and return a mixture of low level nutrients to the soil through an infiltration
gallery. The low level nutrients would encourage the growth of biodegrading microbes in the soil
matrix. This type of in -situ bioremediation system was determined to be a potentially acceptable
as a possible future addition for the Plaza Pantry project site at an approximate installed cost of
$75,000 including a groundwater recovery system.
4.1,6 No a action Taken
If no action were taken to remediate the Plaza Pantry project site natural bio-degradation
accomplished by the existing native micro-organisms would eliminate the contarninati
g
constituents over time, Then ..ajor portion of the contamination was excavated at the time of the soil
testing and the primary exposure pathway is through surrounding, private potable water wells. It is
not clear whether or not natural bio-degradation would accomplish the complete clean-up of the site
before the adjacent wells became contaminated. This alternative is not considered a potentially
feasible alternative due to the migration of contaminants to off -site areas.
Selection of Remedial Action System
Based on a consideration of the three selection criteria listed in the previous section, and a
preliminary evaluation of the technical and economic considerations,as determined that the most
feasible alternative is a vapor enhanced pump and treat with a low flow air sparging system to
increase biodegrading activity. The determination to use a vapor enhanced recovery system for the
Plaza Pantry project site was based on the economic feasibility of using a system that is already
17

present at the site and also the technical feasibility taking into consideration the existing contaminant
concentrations.
As a contingency plan to control migration of contaminated ground water additional groundwater
recovery wells may also be added to the pump and treat system if necessary. If additional treatment
of the groundwater is needed, then 2 to 4 soil vapor extraction wells and 2 to 4 air injection wells
may be added to remediate impacted soils and ground water as part of a treatment system upgrade.
It is important to note that GCI realizes that pump tests and feasibility studies that are typically
available prior to selection of remedial action system have not been conducted for the Plaza Pantry
project site. It is GO's opinion that the majority of this information will be developed from system.
operation information developed during the operation of the system as an initial abatement and
preliminary groundwater treatment system. This CAP makes provision to upgrade the remedial
action system if necessary based on information developed during the first six months of system
operation. This type of design/build evaluation procedure will allow a cost effective method of
verifying system operation effectiveness without the use of unnecessary pilot scale studies.
5.O PROPOSED CORRECTIVEACTION PLAN
5.1 System Overview and General Description
The system that is proposed for use at the Plaza Pantry project site is a package treatment system that
has flexibility to be used as a combination initial abatement and pump and treat system. The
proposed remedial action system will consist of the following system components and phased
approach to remedial action:
Primary System
The following is a description of the groundwater recovery and treatment system that is proposed
for use at the Plaza Pantry project site:
18

A groundwater collection and treatment system as manufactured by QED Environmental.
The QED recovery pumps are designed with adjustable rates,, pumping at a rate of 0.5 to
10 gpm. The groundwater recovery system is also designed to control migration of
contaminated ground water.
2. The QED tray aeration system is a self contained system that is designed to provide
treatment of a wide range of contaminant levels. Vapor enhanced recovery and air injection.
systems will also be used to increase treatment efficiency.
The proposed remedial action system has flow control systems connecting all system
components to ensure that the adequate liquid levels are maintained within the system
optimize the treatment of the ground water. This flow control system will also includes
warning lights and shut -offs to provide adequate protection if the system malfunctions.
Optional System Upgrade
The primary system is designed to allow flexibility in the routing of the process flow, Al] treatment
components will be equipped with flow control valves so that the optimum treatment conditions may
be developed. The flexibility and controls that are built into the system will allow the operator to
account for the variety of circumstances that may be anticipated from a package pump and treat
system, and✓or a soil vapor extractioniair injection system. The system will be upgraded if additional
treatment or containment is required.
5.2 Conceptual. Design and Process Cor, pon+ent Diagram
This section provides a description of the design of the treatment system components for the Phase
I primary system and the Phase 11 system upgrade. Each subsection will provide a discussion of the
following items for each system component:
Description
Operation and performance
Maintenance and reliability
The process flow diagram and preliminary construction details for the system components are as
shown on Figures 3 thru 9 in Appendix A.
19

5.2.1 Groundwater Collection and Treatment Set
The groundwater collection system will include two 2 inch, QED controllerless recovery
pumps that will be installed in the existing monitoring wells MW-1 and MW-3. These wells
will now be identified as 'VERW-1 and VERW-3 respectively. Monitoring well MW-1 and
MW-3 are located in the center of the impacted area. The recovery pumps will be capable
of delivering a maximum flow of 10 gpm, but will be operated at a design flow of 0.5 to 1.0
gpm depending on the aquifer characteristics. The pumps will be powered by a piston air
compressor that is included as part of the remedial action system. Preliminary construction
details of the groundwater recovery system are shown in Figures 3, 5, 7, and 8 in
Appendix A.
The overall basis of design for the recovery pumping system is to provide a medium flow
of impacted water that will cause the pump to go on and off frequently near the upper level
of the impacted groundwater. This type of cyclic pumping is designed to provide sufficient
drawdown to allow the transport of volatile organic contaminates and still develop a
"washing" action as groundwater rises and falls within the soil matrix. Frequent cycle
pumping also decreases the potential for a large drawdown of the groundwater which
increases the migration of contaminants downward. The radius ofinfluence for the recovery
system proposed is expected to be 20 feet and will be confirmed with a pilot study that will
be conducted using information developed within the first three months after installation.
The liquid storage tank that is included as part, of the groundwater recovery system and will.
include high water and low water sensing systems that will be connected to the recovery well
to ensure hydraulic control of the system. The system also utilizes a modified tray aeration
to treat the groundwater prior to discharge.
The proposed groundwater treatment system will meet the influent discharge requirements
of the City of Albemarle wastewater treatment. The estimated treatment efficiency is 95%
20

of the influent concentration. A permit for discharge into the City of Albemarle Wastewater
treatment plant will be applied for after acceptance of this CAP by the NCDEHNR.
The groundwater recovery and treatment system is expected to generally be a low
maintenance item due to the limited amount of moving parts. Periodic maintenance may
include cleaning the trays within the tray aerator and/or replacement of the carbon canisters.
The non-moving parts of the system include the storage tank and oil/water separator that may
involve biannual cleaning and/or replacement of gaskets and intake fittings. A diagram of
the system process components are shown on Figures 3 and 4 of Appendix A.
5.2.2 Vapor Enhanced Recovery System
The two groundwater recovery wells will be connected to a vapor recovery system to allow
the removal ofvolatile and semi -volatile contaminants from the vadose zone of the treatment
area. This system will use an explosion -proof regenerative blower manufactured by EG&G
Rotron or Gast, capable of a flow rate of GO SCFM at 2-3 psi negative pressure. The blower
will be connected through a moisture separator to the soil vapor recovery wells to remove
volatile and semi -volatile organics from the vadose zone of the treatment area. The expected
service life of this type of vapor enhanced recovery extraction blower is on the order of 5 to
1.0 years.
5.23AirInjection System
As mentioned previously, a low flow air injection system will be installed at the project site.
The air will be injected with a 1.5 HP rotary vane compressor manufactured by Gast or
Sullair, capable of a flow rate of 15 CFM at 15 to 25 PSI. High pressure air will be injected
below the groundwater table to allow degradation of volatile and semi -volatile organics and
increase the amount of biodegrading activity in the soil matrix. Based on previous
experiencewith similar air injection equipment, the maintenance of this system would be
limited to 'biannual oil changes and monthly replacement of filters. The air compressors
21

proposed for a low flow air injection system are generally very reliable with an expected
service life of 3 to 7 years.
5.2.4 Effluent Discharge Piping System.
To ensure that the contaminant plume is contained and controlled by the recovery well
system, the proposed system will route the effluent to a sanitary sewer discharge that is
outside the zone of influence of the recovery well. After this CAP has been approved, a
sewer hook-up is expected within a month after application.
As mentioned in previous sections, the Remedial Action System (R .S) may be modified slightly
in the future to provide the optimum treatment of the impacted soils and ground water. Some of the
system components may be taken off line in stages depending on the contaminant levels in the
treatment area. The RAS components are designed with shutoff valves that will allow the removal
of certain system components without adversely affecting the remaining system.
.3 Basis of Selection and System Layout
The basis of selection for the system is provided in Section 4.2, Selection of Remedial Action
System. The primary reason the proposed system was selected was due to cost consideration. Other
reasons include the technical feasibility of the pump and treat technology for containment and
treatment of contaminant plumes and the ease in construction allowed by a package treatment
system.
The system layout is provided on Figure 2 in Appendix A and shows the location of the treatment
system and the sanitary sewer discharge. Figure 4 shows the specific treatment components of the
remedial action system.
22

5.4 Operation and Maintenance of System
Guidelines for the system operation are provided in literature from the equipment manufacturer and
include specific instructions on the installation and startup procedures. The system. is equipped with
simplified on/off controls and an emergencies shut-off if individual system components malfunction.
To ensure proper operation, the RA.S will be monitored/maintained weekly during the first month
of operation arid at bi-monthly interval thereafter. Twice a year the RAS will be shutdown for bi-
annual maintenance. The bi-annual maintenance will .include changing of filters and fluids, and
spraying down system components to remove waste products.
6.0 MONITORING, SYSTEM EVALUATION AND REPORTING
6.1 System Start-up Schedule
The proposed schedule for accomplishing the remedial actions described in the CAP are shown
below:
TABLE 4
PLAZA PANTRY PHILLIPS 66 SERVICE STATION
REIVIEDIATION ACTION OPERATION SCHEDULE
Task Description
CompleteCornpiete InstaI1ation of Remedial Action
Treatment System
Installation of Remedial Action System
upgrade and/or additional recovery pumps
Submittal of initial monitoring data to
determined system effectiveness
Schedule Start
Within 60 days after receipt of approval of
CAP
Within 30 days after Notice to Proceed from
the 'NCD.EFINR
Within 90 days after system start-up
Note: For additional schedule information see Table 3 in Section 2.2
23

6.2 System Start-up Procedures
After the system has been installed and the components have been demonstrated to be operating
correctly, the system will be monitored twice a week for a period of two weeks to determine if the
system is operating at its optimum level. During this two week startup period, several variations of
treatment and cycle rates will be attempted in order to develop the optimum combination for the
project site, A record of the startup activities and optimum operation methods will be recorded in
a project journal which will he kept at the project site.
6.3 Sampling and Monitoring Plan
The monitoring of the treatment system at the Plaza Pantry project site will include both
groundwater and system monitoring, The results of this monitoring will be recorded in the project
journal and reported to the 'NCDEHNR on a quarterly basis, The groundwater monitoring will
include measuring the groundwater levels in the wells within the confines of the treatment system
and the nearby monitoring wells. This activity will be performed to help ensure that the treatment
system is not directing the flow of ground water in a direction that would cause a negative impact
on surrounding areas.
63.1Groundwater. MonitQring
The groundwater monitoring will include quarterly monitoring of all of the on -site wells in
accordance with EPA Methods 601 and 602 Extended, To provide an indication of the
hydraulic control provided by the on -site recovery well, the groundwater levels will also be
measured monthly. The information developed from the groundwater monitoring will be
submitted quarterly to the NCDE1{NR for review.
24

e operation and a tatenance of the treatment system,
to allow the accomplishment of many tasks in a single
place, a regular routine for sampling, operation, and ma.
control the costs alme project.
6 3 Treatment yste onitor
The remedial action syster
be checked at least every t eks and preventative
maintenance will be performed at monthly andfor biannual interval , During these periodic
observation visits to the site, the treatment system operator will;
Check the functioning of al
secondary shutoff controls.:
'step
components and the operation of primary and
Observe the presence of B11 c nsti uent in the treatment systemm ischar
determine if charcoal adsorption capacity has been breached.
Note the condition of system components and pe
necessary.
mneamattena ce,
Record all observant is in the ournal at the project ite and provide a repor
observations that concern permit conditions to the NC EEINR..
To pro\ ide for the most cast
Obvious that m of the activities described above may he coordinated and/or combined
After the system is in
e will be established to help
25

The followg table provides a summary of the recommended groundwater and system
monitoring for the project site:
'ABLE .
PLAZA PANTRY PHILLIPS 66 SERVICE STATION
SUMMARY OF MONITORING AND MAINTENANCE
Task Description
Sampling 60 1 /601 Ext
indwater Levels MW-1 through MW-7D
Sampling of System Influent and Effluent for
Methods 601/602 Ext..
'heck system operation and routine
preventative maintenance
Biannual maintenance of treatment system
and recovery pumps
Quarterly
Monthly
Monthly
Bimonthly
Biannual
6.4 Troubleshooting and Evaluation of S
,ss
During the start-up phase, a list of common problems and probable solutions will be developed.. This.
list will be placed in the journal located at the project site so that it may be used by project personnel
in the operation and maintenance of the treatment system, The monitoring test results that are
obtained during the periodic sampling will be used to evaluate the effectiveness of the system in
accordance with the proposed treatment goals.
It is expected that some time during the first year of treatment there will begin to be a noticeable
increase in the rate of decrease in the level of contaminants in soils and ground water of the treatment
26

area. This initial drop in the subsurface soil and groundwater contamination is expected to be
followed by regular decreases in the contaminant levels. The percentage of decrease will be
evaluated according to the pre -established treatment goals.
6.5 Recommended. Requirement for SiClosure
As mentioned in Section 2.0, this CAP proposes that treatment would continue until the proposed
treatment goals are achieved within an estimated two (2) to four (4) years from start-up of the
systettr. Section 2.0 also proposes that system components be removed in stages according to several
interim treatment goals. It is important to note that the CAP recognizes that the maximum expected.
treatment levels may be below the NCAC 21, target treatment goals that are required by the
NCDEHNR. Sometime in the future it may be necessary to submit an alternative CAP report in
accordance with NCAC 2L, .0106, (k), (1) or (m) if it is not possible to meet the target treatment
goals with the best available technology. It is the opinion of C3CI, that it would be in the best
interest of the State of North Carolina and South Central Oil Company to invest some time and effort
in developing treatment goals that are based on what is reasonably achievable in the soil conditions
at the Plaza Pantry project site. The estimated time to achieve the optimum amount of groundwater
treatment is four (4) years from the date of implementation of the remedial action systems. The
remedial action system and possible future system upgrades are designed to provide the optimum
amount of rernediation, while making the best possible attempt to meet the NCAC 2L: Standards,
cWRPLZAPANCAP
27

APPENDIX
Figure - Site L °cation Map
Figure ? v Project Site Map,
F�gur 3 - Trenching Detail
Figure 4 - Cross Sections
Figure 5- Groundwater water Recovery Systo a1
figure 6- Vapor Extraction / Air Irx, e . i(1 step-
gure - Treatment System Layout
Figure 8 - Vapor EnhancedRecover)" e11 head Detai
Figure 9 - Air Injection Well Head Detail
Figure 1 1- Well Survey Map a

SCALE (IN FEET
Asphalt Pavement
GEO--ENVIRONMENTAL
CONSULTANTS, INC.
I AL T /ENVIRONMENTAL ENGINEERS & SCIENTISTS
eS ROAD, CHARLOTTE, NC ,'5,269 7A37
PHONE (704) y$ i71jr FAX ('04JT, h.-.877i7
LEGEND
A MW-M MONITORING WELLLOCATION
• f6-# SOIL BORING LOCATION
PLAZA PANTRY
CORRECTIVE ACTION PLAN
ALBEMARLE, NORTH CAROLINA
SITE MAP FIGURE

Canopy
0
oXirr)afe
MW-9
ED ATION --
SHED
Concrete Pad _ ww
Over Fuel Tank
0MW-4
20 40 80
SCA
N FEET)
Pad
Previously
Excavated
Area
TRENCHING
VERW- r
Asphalt Pavement
GE0--EN
CONSUL ANTS, INC
GF. Ciu CH#�Btt:A L,+"E6v!R0NIMEN'E41, ENGINEERS & SCIENTISTS
I1704 R'h M€S ROAD, cHARl(T??E, No 28269 763.?
PHONE", ( U4)596--tl?a8 FA (', 04)596-8770
LEGEND
MW-# MON€CORING WELL LOCATION
B-} SOIL BORING LOCATION
VERW-4 VAPOR ENHANCED RECOVERY WELL LOCATION
AI--# AIR INJECTION WELL LOCATION
gromalmoiliNNIMMIN PROPOSED TRENCHING LOCATION
---- APPROXIMATE PROPERTY LINE
PLAZA PANTRY
CORRECTIVE ACTION PLAN
ALBEMARLE, NORTH CAROUNA
TRENCHING DETAIL ^ FIGURE

SEE WELL HEAD
DETAIL FIGURE X
RE
v1EDIATI©N SHED
AIR SUPP't
HA MMERHEA
CONTROLLER -LESS
PUMP
RECOVERY WELL
TYPICAL FOR 2 WELLS
SURGE TANK
PISTON
COMPRESSOR
WATER
TRENCHING
GURU TANK
500 GALLON
EVIL Sw1TC
TRAY AERATOR
AERATION TRAY
ROLTANG TANK
'AIN VALVE
PROCESS FLOW DIAGRAM
GEO—ENVIRONMENTAL
CONSULTANTS, INC.
GEOTECHNICAL/ENVIRONMENTAL ENG?NEER5 do SCIENTISTS
11'704 REAMES REMO, CHARLOTTE, NC 2826.9-7637
PHONE [phone]A FAX [phone]
PROJECT MT: CE,H.
rESicN er: c.�.H. ALBEMARLE, NORTH CAROLINA
DRAWN BY: J.L.L. GROUNDWATER RECOVERY FIGURE
SCALE, NOT )I;D SCALE TREATMENT SYSTEM 5
UI5004RG[ 0Q
00 SEWER 5051ti
PLAZA PANTRY
CORRECTIVE ACTION PLAN

REMEDIATION SHED
SEE WELL HEAD
DETAIL FIGURE X
AI-6 (%t) MW-6 VERW- 1 @ MW°
AI-12 C` MW-12 VERW-3 © MW-3
(AI-12 OPTIONAL
AIR
INJECTION
4.011 lu OTfCI *EU SOREDI
VAPOR ENHANCED
RECOVERY WELL
TYPICAL FOR 2 WELLS TYPICAL FOR 2 WELLS
ROTARY VANE
COMPRESSOR
VAPOR E
TREkCHING
GEO - ENVI RONIVIENTAL
CONSULTANTS, INC.
GEOTECI* CAL/RONMENTAL ENGINEERS ak SCIENTIST
11704 REAMES ROAD, CHARLOTTE, NC 25269-7637
SHONE [phone] FAX [phone]
MO WOK
�flFARiRkeN
BLOWER
PLAZA PANTRY
CORRECTIVE ACTION PLAN
ALBEMARLE, NORTH CAROLINA
VAPOR EXTRACTION AND F1GUFiE
AIR INJECTION SYSTEM 6

VENT -
--
RESTROOMS BUILDING
DISCHARGE TO SANITARY SEWER
TRANSFER
PUMP
BLOWER
TRAY AERATOR
VENT
TRANSFER
PUMP
IN -LINE FILTER
MOISTURE
SEPARATOR
SURGE TANK
REMEDIATION BUILDING
( BY OTHERS )
GEO
CONSULTANTS , INC.
GEOTECHNICAL/ENVIRONi.MEN'TAE ENGINEERS le SCIENTISTS
11704 REAMES ROAD, CHARLOTTE', NC 2E1769--7637
PRONE 0EI4)596 —8788 FAX (7(14)5g6-87)0
7 UNDERGROUND
TRENCHING
PLAZA PANTRY
CORRECTIVE ACTION PLAN
ALBEMARLE, NORTH CAROLINA
SYSTEM LAYOUT HOURE

MINIMUM 6" DEEP x 10' WIDE
CAST IN PLACE CONCRETE COLLAR--- -�
(SLOPED FOR DRAINAGE)
2"0 PVC PIPE
LONG EXTENSION ----
REDUCING TEL-w.
CEMENT GROUT
MINIMUM 2" DEEP
SEALED -
CAP
3/`83 0 AIR SUPPLY LINE
TO PUMP
WEL
ETAL VAULT COVER
WATER TIGHT SEAL
PVC PIPE
'ASING (TYP,)
VAPOR ENHANCED RECOVERY
WELL HEAD DETAIL
SCALE : 1
GE O—E'NVIRONME'NTAL
CONSULTANT'S INC.
GEOTECHNPCAL/ENVIR©NMLNTAL ENGINEERS & SCIENTISTS
Q4 REAMCS ROAD, CHARLOTTE NC 28269-7637
[phone] FAx [phone]
DISCHARGE LINE
FROM PUMP
2"0 SCH. 50 PVC PIPE
FOR VAPOR EXTRACTION
PLAZA PANTRY
CORRECTIVE ACTION PLAN
C n . ALBEMARLE, NORTH CAROLINJA
J L L
OwN SYSTEM DETAIL F, 8

fMPRE':
CAP
MINIMUM 6." DEEP x 1 0" WIDE
CAST IN PLACE CONCRETE COLLAR ..v..
(SLOPED FOR DRAINAGE)
2"0 PVC PIPE
LONG EXTENSION
RED IUINC TEE,
CEMENT GROUT
MINIMUM " DEEP
IAL. VAULT COVER
WATER TIUF1T BEAD
°w PVC PIPE
WELL CASING TYR.)
AIR I JECTIO
ELL HEA DETAIL
SCALE A 1.
GEO-- NEAL
CONSULTANTS, INC.
OTEEH IEXL/ENVIRONM NSA. ENGINEERS & SCE Ti
RFAMFS ROAD, CHARLOTTE, NC 2
4129b—&766 FAX (204
HRH
DAT
HR ,r'T R
DESHRNTS: Cc.H.
7 DRAM BYAS STID
...__._.
REINFORCED HOSE
R AIR INJECTION WELL.
sa
PLAZA PANTRY
CORRECTIVE ACTION PLAN
ALBEMARLE, NORTH CAROLINA

ESTMINSTER
RESBY'TERIAN
CHURCH
WATER TOWER
BOGANGLES
PIZZA HUT
US ARMY
RESERVE
TACO BELL
ALBEMARLE
PLAZA
BUILDERS
MART
CAROLINA
a— ENVI'RON T ENTA,
NSULTANTS, INC.
GEOTECHNICAL/ENYIRCtiNMENTAL ENGINEERS & SCIENTISTS
1 T704 ({FAMES ROAD, CHARLOTTE:, NC .73269 7637
PHONE (JU^1j5`5-1X]XR FAX 704)';ALAH lr©
D
EL€C
AWN BY JLE
A. NOT To SCALE
BATTING
CAGES
PLAZA PANTRY
CORRECT VE ACTION PLAN
ALBEMARLE, NORTH CAROLINA
WELL SURVEYm FIto
GURE

PRELIMINARY STI 1
PRIMARY TREATIVIENT SYSTEM
A Svstem Material
l .Groundwater Recovery verySystem ..
(Includes Piston Compressor,. Surge Tank Air Stripper / ion
Groundwater Recovery Pumps, est. 2 @ $3,500.00
Air Injection Trenching and Piping, 170 If ` .00/1f_.
Well Heads
Vapor Enhanced Recovery, est. 400.00 .:
Air Injection , est. 2 ( 00.00
Soil Vapor'xtraction System
(Includes Moisture Separator, In -Line filter and B1ov+
Systetrr Installation, est,
Technician, 120 hours 0.00r'hou
Project Manager, 20 hours 0.00/hour
Sealer Project Manager, 10 hours @ $65.001hour
. Transfer Tank for (discharge
Materials and Equipment Rental
9. Electrical, Materials, Sub contractor, lump sure
ESTIMATED TOTAL
B. Mair to as a and Operatirt, (MONTHLY)
Treatment System Maintenance r ........ .
Quarterly sampling of 7 welts @, 0,00/well,
four times per year (charged can a monthly basis)
of Panel)
0,000.00
,000.00
1,190.00
00.00
400.00
,000.00
,600.00
1,000.00
650.00
00.00
1,000.00
3,500.00
38,640.00
00.00
.33
TOTAL MONTHLY CHARGE ......... 983.33

The hydraulic conduc
vi
6
or the site was determined by conducting slug tests using
monitor wells, MW-11 and MW-12. The data was evaluated using the Bower and Rice
Method. The hydraulic conductivity was calculated as 9.6 ft/year for MW-12 and 348 ftlyear
for MW-1 1. Hydraulic conductivity data and calculations are provided in Appendix B.
TABLE II
Ground -Water Elevation Data
December 13, 1991 and September 28, 1992
December 13, 1991
September 28, 1992
Well ID
Top of Casing
Elevation
(feet)
Depth of Water
Water (feet) Elevation
(feet)
Depth to
Water (feet),
Water
Elevation
(feet)
MW 1
577.92
9.78 568.14
10.20
567.72
MW-2
573.28
9.63 563.E
9.77
563.51
573.17
MW 3
577.24
4,32 572.92
4.07
MW-4
581.13
f3.97 572.16
4.86
576.27
MW-5
575.73
12.02 563.71
12.13
563.60
MW-6
576.26
11.36 564.90
11.45
564.81
MW-7
574.80
7.26 567.54
7.24
567.56
MW 8
571.49
9.70 561.79
10.08
561.41
MW-9
580.15
7.26 572.89
7.11
573.04
MW 10
576.12
( 6.40 569.72
6.11
570.01
MW-11
569.44
7.18 562.26
7.24
562.20
MW-12
NS
7.07 NS
7.38
NS
NS: not surveyed.

TABLE III
Laboratory Results of Ground -Water Samples
Well Number Parameter (ug11)
Ethylbenzene
Toluene
Xylenes
hyl-Tertit ry-Butyl-Ether (MTBE
MW-1 MW-2 MW-3
1,700 2.7 14,000
300 1.0 1,000
1,700 7.4 13,000
1,500 4.4 8,000
NA 5.1 NA
EDB NA NA NA
Well Number Peremeter (ug/l)
7
M W -8
Benzene
ND
NO
28
250
5.8
Ethylbenzen
ND
Toluene
ND
ND
8.1
300
ND
ND
81
1,200
38
Xylenes
ND
ND
42
00
thyl-Tertiary-Butyl-Ether (MTBE)
ND
ND
ND
12
ND
IPE
EDB
NA
NA
NA NA
amp -led by Lew
NA
NA
NA NA
NA
ironmental pan May 2, 1990.
NA
Well Number Peremeter (ug/1)
Benzene
Ethylbenzene
Toluene
Xylenes
Methyl -Tertiary -Butyl -Ether (MTBE)
IPE
MW-9
ND
ND
ND
ND
9.4
NA
MW-10
ND
ND
ND
ND
ND
NA
MW-11
ND
ND
ND
ND
ND
NA
EDB
.©8
.10
.03
MW-9, MW-10, and MW-11 samples by SPATC 1'nvironmenthI can August 3T, 1990.
NA not enelyzed.
ND = not detected,

TABLE IV
Laboratory Results of Ground -Water Samples
Collected on September 28, 1992
Number Parameter {ug/1)
Benzene 11,000 <1 27,000
Ethylbenzene "k,200
8,900
3,000
3,400
<1,000
26,000
9,800
8,300
<5,000
<1,000
10
zene
<1
<1
<1
Ethylbenzen
<1
Toluene
Xylanes
<1
<1
<1
hyP-Tertie -But I -Ether [MT8E
<5
<5
290 84
4
IPE
<5
<5
12
80
E
<1
<1
<1
<1
Well Number Parameter #u
Benzene
MW•9
MW-10
MW-11 MW-12
<1
<1
Ethylbenzen®
Methyl-Tertie
Toluene
Xylenes
utyl-Ether IMTBEI
IPE
<1
<1
9
<5
<1
<1
<1
<5
<1
<1
38
<5
<1
<1
<1
110
EDB
indicates concentrations 5esst.
n
<1
tb
<1
election ievet of 1 ppb.
<1

pAVEL,
SOIL AREA
LEGEND
MONITOR WELL
CIJVOPY
MW - 9
CONC
OVER
A
0 30 50 12 ©
SCALE (IN FEET)
IOW-11
SPA CO Venvionn°en
FIGURE 2: SITE MAP
PHILLIPS 66-ALBEMARLE PLAZA
ALBEMARLE, NC
WO #9-3224
DWG #PHIL66
DATE: 1 /22/93
DRAWN BY: JCJ

LEGEND
MONITOR WELL
6© 120
SCALE (IN FEET)
Mw-5
SPA
CO /environmental
FIGURE 3: GEOLOGIC CROSS-SECTION
TRANSECT MAP
PHILLIPS 66-ALBEMARLE PLAZA
ALBEMARLE, NC
0 #9-3224
DWG I/PHIL66TS
DATE: 1/22/93
DRAWN BY: JCJ

A
MW#9
STATIC WATER LEVEL.
SANDY SILTY CLAY P.ESIOIUM
GRAY SHALE
MW#1
M W{2
ASPHALT
PARTIALLY WEATHERED ROCK
CRUSHED 'TO SANDY SILTY CLAY
SCREENED INTERVAL.
FILL - SANDY SILTY CLAY
w1TH GRAVEL
IIVP
A'
MW#11
SCAt E'
- 10' VERTICAL
1• 60' HORIZONTAL
SPATCO / environmental
SUBSURFACE PROFILE A --A'
ALBEMARLE PLAZA
ALBEMARLE, N. C.
FIGURE 4
2-14-91

STATIC ATEh LEVEL
SAUCY S1TY CLAY E ES1C 1UM
GRAY SHt :1
1' ,6 'BALLY WEATHERED rock
EEt, SHED TO SANDY SILT , CLAY
SCREENED 1hTEV
F1 I SAN Y SILTY i AY"
t+ I TH G A VE L
0
R1CAL
atWON'T4
SPANCO environ nt1
SUBSURFACE PROFILE -B
ALBEMARLEFLZ
L EMA LE, N.
FIGURE 5

AREA
LEGEND
MONITOR WELL
n 572.16'
GROUND WATER CONTOUR
GROUND WATER FLOWa' DIRECTRDN
0
---0 60 120
SCALE (IN FEET)
rn
.71'
5°
S 'ATCO environrnenta
FIGURE 6: WATER TABLE CONTOUR MAP
ON 12/13/91
PHILLIPS 66-ALBEMARLE PLAZA
ALBEMARLE, NC
WO #9-3224
DWG iPH166WT1
DATE: 1722/93
DRAWN BY: JCJ

4.37- mxv
SOIL. AREA
7.72y
LEGEND
MONITOR WELL
GROUND WATER CONTOUR
575.27'
ND WATER FLOW DIR£: °TION
.60'
5Fa2.20'
SPATCO renviranment
FIGURE 7: WATER TABLE CONTOUR MAP
ON 9/28/92
PHILLIPS 66-ALBEMARLE PLAZA
ALBEMARLE, NC
© # 9322_4
DWG JPHI66WT2
DATE: 1 /22/r93
DRAWN BY: JCJ

LEGEND
1dONITOR WELL
BTEX CONCENTRATION CONTOUR
MW-4
'Y ND
TE PA
�f. TANK
•1GOOD ppb
MW-1
GO 120
SCALE (IN EECT)
61W-5
ND
5
SPATCO /environmental
FIGURE 8: E3TEX CONCENTRATION ISOPLETH
MAP ON 10/22/90
PHILLIPS 66--ALBEMARLE PLAZA
ALBEMARLE, NC
WO 419-3224
DWG #PHI66BTX
DATE: i /22/
DRAWN BY: JC

MONITOR WELL
EOTEX CONCENTRATION CONTOUR
30 6CJ 120
SCALE (IN FEET)
low-5
ND
SPATCO renvironmen
FIGURE 9: TOTAL BTEX CONCENTRATION
ISOPLETH MAP ON 9/28/92
PHILLIPS 66-ALBEMARLE PLAZA
ALBEMARLE, NC
fWO ;#'9-3224
DWG #PH?L66ST
DATE: t /22/93
DRAWN BY: JCJ

- SOIL AREA
LEGEND
MONhTOR WELL
OEN2ENE CONCENTRATr0N CONTOUR
60
SCALE (IN FEET)
ppt)
MW-5
41 ND
MW-2
NQ
SPATCO %environrnen
FIGURE 1 ©: BENZENE ISOPLETH MAP
ON 9/28/92
PHILLPPS 66—ALBEMARLE PLAZA
ALBEMARLE, NC
WC #9-322,1
DWG /(PHIL6c1N
DATE: 1 /22/93
DRAWN BY: « CJ

DIVISION OF ENVIRONMENTAL MANAGEMENT
CERTIFICATION FOR THE SUBMITTAL OF A CORRECTIVE ACTION PLAN
UNDER 15A NCAC 2L.0106(c)
Responsible Party: SouthCentralOil Company
Address: 2121 WestMain Street
City: Albemarle , State: NC Zip Code: 2800
Site Name: Plaza Pantry Phillips 66 Station
Address: NC Highway 24/27/73 & NC Hiqhway 24/27
City: Abemarle, Co.: Stanly, Zip Code: 2e00l
Groundwater Section Incident Number:
I, Christopher D. Hardin t a Professional Engineer/Licensed
Geologist (circle one) for Qeo-Environmental Consultantsdo hereby
certify that the information indicated below is enclosed as part of
the required Corrective Action Plan (CAP) and that to the best of
my knowledge the data, site assessments, engineering plans and
other associated materials are correct and accurate.
(Each item must be initialed by hand by the certifying
licensed professional)
2.
6.
A listing of the names and addresses of those
individuals required to be notified to meet the
notification requirements of 15A NCAC 21, .0114(a)
is enclosed. Copies of letters and certified mail
receipts are also enclosed.
A Professional Engineer or Licensed Geologist has
prepared, reviewed, and certified all applicable parts
of the CAP in accordance with 15A NCAC 2L .0103(e).
A site assessment is attached or on file at the
appropriate Regional Office which provides the
information required by 15A NCAC 2L .0106(g).
A description of the proposed corrective action and
supporting justification is enclosed.
Specific plans and engineering details for the
restoration of groundwater quality are enclosed and
propose the use of the best available technology for
the restoration of groundwater quality to the levels
of the groundwater standards prescribed in
15A NCAC 2L .0202.
A schedule for the implementation and operation of the
CAP is enclosed.
(OVER)
GW-100(c) Rev. 9/94

A monitoring plan is enclosed which has the capacit to
evaluate the effectiveness f the remedial activity and
the movement of the contaminant plume, and which meets
the requirements of 1 A NCAC 2L.0110.
The a tivit 'Jhi h resulted in the contaminatcontamination incident
is not permitted by the State 'as defined in 1 A NA
.0106(e).
(Please Affix Seal and Signature)
Note: Any modificationsmade to this
of your submittal.
-1 ( Nev. 9/94
ay result i the turn