NC0086380_Complete File - Historical_20041123

A i";A
NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Michael F. Easley, Governor William G. Ross, Jr., Secretary
Alan W. Klimek, P.E., Director
November 23, 2004
Mr. Jim T. Schaeffer
BP Oil Company
2475 Northwinds Parkway, Suite 400
Alpharetta, Georgia 30004
Subject: Rescission of NPDES Permit NCO086380
Former BP station 24154 remediation
Guilford County
Dear Mr. Schaeffer:
Division staff has confirmed that the subject permit is no longer required, as this remediation system
has been shut down. Therefore, in accordance with the request forwarded to us by URS Corporation,
NPDES Permit NCO086380 is rescinded, effective immediately.
If in the future you wish to again discharge remediated groundwater to the State's surface waters,
you must 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 you have questions about this matter, please contact Charles Weaver of my staff at the telephone
number or address listed below. You may also contact the Winston-Salem Regional Office at (336)
771-4600.
Sincer ly,
�f Alan W. Klimek, P. E.
cc: Central Files
Winston-Salem Regional Office / Corey Basinger
NPDES Permit file
Technical Assistance & Certification Unit
Fran McPherson, DWQ Budget Office
Susan Bostian / URS Corporation
1617 Mail Service Center, Raleigh, North Carolina 27699-1617
512 North Salisbury Street, Raleigh, North Carolina 27604
Internet: h2o.enr.stale.nc.us
Phone: [phone], extension 511 / FAX [phone]
[e-mail]
NorthCarci ina
;Vaturallrf
An Equal Opportunity/Affirmative Action Employer — 50% Recycled/10% Post Consumer Paper

Re: NC0986380 - rescission requested
Subject: Re: NCO086380 - rescission requested
From: Corey Basinger <[e-mail]>
Date: Mon, 22 Nov 2004 14:26:38 -0500
To: Charles Weaver <[e-mail]>
OK to rescind.
Corey
On 11/22/2004 12:39 PM, Charles Weaver wrote:
Corey, I'm faxing you a copy of the request to rescind NCO086380 in Guilford
County.
If the WSRO has no objections, I'll rescind it.
Thanks,
CHW
Corey Basinger
NC DENR Winston-Salem Regional Office
Division of Water Quality, Water Quality Section
585 Waughtown Street
Winston-Salem, NC 27107
Voice: [phone] ext 288
FAX: [phone]
1 of 1
11/22/2004 2:43 PM

W10 L19
July 15, 2004
Mr. Alan W. Klimek, P
NCDENR — Division
1617 Mail Service enl
Raleigh, North C olitu
Water Quality
27699-1617
RE: Request for Voidance of
NPDES Permit No. NCO086380
Former BP Service Station No. 24154
5601 West Friendly Av.
Greensboro, North Carolina
URS Project No. 38435973
Dear Mr. Klimek:
19
f0 �RQU
On behalf of BP Products North America Inc., (BP), URS Corporation — North Carolina
(URS) is requesting a voidance of the above referenced permit. A pump and treat
remediation system operated at this site from April 1999 to December 2002. The system
has been offline since 2002 and will not be restarted. Therefore, we formally request that
the permit be cancelled.
URS will continue monitoring the groundwater at the site and if required will implement a
non -discharging remedy in the future. Annual Groundwater Monitoring Reports are
submitted to the NCDENR through the Guilford County Health Department.
Thank you for your consideration. If you have any questions or require additional
information, please contact me at 919-461-1244.
Sincerely,
Susan Bostian, P.E.
URS Corporation — North Carolina
cc: Ms. Rebecca Kulas, BP (electronic)
Cindy Split, Williams & Ross (electronic)
ENFOS (electronic)
URS file (hard copy)
URS Corporation - North Carolina
1600 Perimeter Park Drive, Suite 100
Morrisville, NC 27560
Tel: [phone]
"/ l
Fax: [phone]

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WAT
F�^G
Michael F. Easley, Governor
O�O�(
F'1Y�
State of North Carolina
William G. Ross, Jr., Secretary
Department of Environment and Natural Resources
y
Q Y
Alan W. Klimek P.E., Director
Division of Water Quality
October 6, 2003
Jim T. Schaeffer, Environmental Business Manager
BP Oil Company
2475 Northevinds Parkway, Suite 400
Alpharetta, Georgia 30004
Subject: Issuance of NPDES Permit NCO086380
BP Oil Service Station 24154 GW REM
Guilford County
Dear Mr. Schaeffer:
The Division of Water Quality (the Division) hereby transmits the approved final NPDES permit for the subject site.
This permit is issued pursuant to the requirements of North Carolina General Statute 143-215.1 and the
Memorandum of Agreement between North Carolina and the U.S. Environmental Protection Agency dated May 9,
1994, or as subsequently amended.
If any parts, measurement frequencies, or sampling requirements contained in this permit are unacceptable, you have
the right to an adjudicatory hearing upon written request within thirty (30) days after receiving this letter. Your request
must be in the form of a written petition conforming to Chapter 150B of the North Carolina General Statutes, and
must be filed with the office of Administrative Hearings, 6714 Mail Service Center, Raleigh, North Carolina 27699-
6714. Unless such a demand is made, this permit shall be final and binding.
This permit is not transferable except after notifying the Division of Water Quality. The Division may require
modification, or revocation and re -issuance of this permit. Please notice that this permit does not affect your legal
obligation to obtain other permits required by the Division of Water Quality, the Division of Land Resources, the
Coastal Area Management Act, or other federal or local governments.
If you have questions, or if we can be of further service, please contact Joe Corporon at IIoe.Corporonna.ncmail.net]
or call [phone], extension 597.
Respectfully,
ORIGINAL SIGNED BY
Tom Behick
\Lur \\ . Klimek, P.E.
cc: Central Files
Winston-Salem Regional Office, V ater Quality Section
Aquatic Toxicolctp� Unit
NPDFS Unit
URS Corporation — N�,rth Can,hna.
16W Perimeter Patk Drive, M. arewille, NC 27560
Attn: Susan 8osiian
eI I
NCDENR
North Carolina Division of Water Quality 1617 Mail Service Center Raleigh, NC 27699-1617 [phone] Customer Service
1 800 623-7748

Permit NCO086380
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
(NPDES)
In compliance with the provisions of North Carolina General Statute 143-215.1, other lawful standards and regulations
promulgated and adopted by the North Carolina Environmental Management Commission, and the Federal Water Pollution
Control Act, as amended,
BP Oil Company
is hereby authorized to discharge remediated groundwater from the
BP Service Station 24154 remediation site
5601 West Friendly Avenue
Greensboro
Guilford County
to receiving waters designated as an unnamed tributary to Horsepen Creek within the Cape Fear River Basin
in accordance with effluent limitations, monitoring requirements, and other conditions set forth in Parts I, II, and
III hereof.
This permit shall become effective November 1, 2003.
This permit and authorization to discharge shall expire at midnight on May 31, 2006.
Signed this day October 6, 2003.
ORIGINAL SIGNED BY
Tom Belnick
Alan W. Klimek, P.E., Director
Division of Water Quality
By Authority of the Environmental Management Commission

Permit NC0086380
SUPPLEMENT TO PERMIT COVER SHEET
All previous NPDES Permits issued to this facility, whether for operation or discharge are hereby revoked, and as of this
issuance, any previously issued permit bearing this member is no longer effective. Therefore, the exclusive authority to
operate and discharge from this facility arises under the permit conditions, requirements, terms, and provisions described
herein.
BP Oil Company is hereby authorized to:
1. Continue to operate the groundwater remediation system that includes:
• Phase/water separator
• Influent sampling port
• Particulate filter
• Low profile air stripper
• Granular activated carbon filter
• Transfer pump
• Flow totalizer,
• Emergency trips and controls
This system is located at the BP Service Station 24154 remediation site (5601 West Friendly
Avenue, Greensboro) in Guilford County.
2. Discharge from said treatment works at the location specified on the attached map into an
unnamed tributary to Horsepen Creek (Class WS-III & B NSW waters) in the Cape Fear
River Basin.
-� r

Permit NCO086380
A. (1) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
During the period beginning on the effective date of the permit and lasting until expiration, the Permittee is
authorized to discharge wastewater from a groundwater remediation system from Outfall 001. Such
discharges shall be limited and monitored by the Permittee as specified below:
EFFLUENT
CHARACTERISTICS
EFFLUENT LIMITATIONS
MONITORING REQUIREMENTS
Monthly
Average
Daily
Maximum
Measurement
Frequency
Sample
Type
Sample
Location
Flow 1
0.0072 MGD
Continuous
Recorder
Effluent
Total Suspended Solids
30.0 mg/1
Monthly
Grab
Effluent
Oil and Grease 2
Monthly
Grab
Effluent
Benzene
Monthly
Grab
Effluent
Toluene
Monthly
Grab
Effluent
Ethylbenzene
Monthly
Grab
Effluent
Xylene
Monthly
Grab
Effluent
Methyl Tert-butyl Ether
Monthly
Grab
Effluent
Lead
Monthly
Grab
Effluent
1,2 Dichloroethane
Monthly
Grab
Effluent
Fluorene
Monthly
Grab
Effluent
Naphthalene
Monthly
Grab
Effluent
Phenanthrene
Monthly
Grab
Effluent
Phenol
Monthly
Grab
Effluent
Iron
Monthly
Grab
Effluent
Manganese
Monthly
Grab
Effluent
1,l Dichloroethene
0.057 µg/L
Monthly
Grab
Effluent
Trichloroethene
Monthly
Grab
Effluent
Methylene Chloride
Monthly
Grab
Effluent
Chronic Toxicity 3
Quarterly
Grab
Effluent
Notes:
L If discharge is not continuous, now may be monitored weekly by an instantaneous flow estimate. If no
discharge occurs during a given month, the permittee shall indicate "No Discharge" on the monthly Discharge
Monitoring Report (DMR) to the Division.
2. Where possible, the grab sample for oil and grease should be skimmed from the surface of a quiescent (calm
water) zone.
3. Chronic Toxicity (Ceriodaphnia), P/F at 90%. Monitoring, Quarterly during months February, May,
August, and November, See Supplement to Effluent Limitations and Monitoring Requirements Page -
Special Conditions A (2).
There shall be no discharge of floating solids or visible foam in other than trace amounts.

Permit N000863 `o
A. (2) CHRONIC TOXICITY PERMIT LIMIT (Quarterly)
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to
Ceriodaphnia dubia at an effluent concentration of 90 %.
The permit holder shall perform at a minimum, artarterly monitoring using test procedures outlined in the "North
Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure," Revised February 1998, or subsequent versions or
"North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised -February 1998) or
subsequent versions. The tests will be performed during the months of February, May, August, and November.
Effluent sampling for this testing shall be performed at the NPDES permitted final effluent discharge below all
treatment processes.
If the test procedure, performed as the first test of any single quarter, results in a failure or ChV below the
permit limit, then multiple -concentration testing shall be performed at a minimum, in each of the two
following months, as described in "North Carolina Phase lI Chronic Whole Effluent Toxicity Test
Procedure" (Revised -February 1998) or subsequent versions.
The chronic value for multiple concentration tests will be determined using the geometric mean of the highest
concentration having no detectable impairment of reproduction or survival and the lowest concentration that does
have a detectable impairment of reproduction or survival. The definition of "detectable impairment," collection
methods, exposure regimes, and further statistical methods are specified in the "North Carolina Phase II Chronic
Whole Effluent Toxicity Test Procedure" (Revised -February 1998) or subsequent versions.
All toxicity testing results required as part of this permit condition will be entered on the Effluent Discharge
Monitoring Form (MR-1) for the months in which tests were performed, using the parameter code TGP3B for
the pass/fail results and THP3B for the Chronic Value. Additionally, DWQ Form AT-3 (original) is to be sent to
the following address:
Attention: NC DENR / DWQ / Environmental Sciences Branch
1621 Mail Service Center
Raleigh, North Carolina 27699-1621
Completed Aquatic Toxicity Test Forms shall be filed with the Environmental Sciences Branch no later than 30
days after the end of the reporting period for which the report is made.
Test data shall be complete, accurate, include all supporting chemical/physical measurements and all
concentrationlresponse data, and be certified by laboratory supervisor and ORC or approved designate signature.
Total residual chlorine of the effluent toxicity sample must be treasured and reported if chlorine is employed for
disinfection of the waste stream.
Should there be no discharge of flow from the facility during a month in which toxicity monitoring is required,
the permittee will complete the information located at the top of the aquatic toxicity (AT) test form indicating the
facility name, permit number, pipe number, county, and the month/year of the report with the notation of "No
Flow" in the comment area of the form. The report shall be submitted to the Environmental Sciences Branch at
the address cited above.
Should the permittee fail to monitor during a month in which toxicity monitoring is required, monitoring will be
required during the following month. Should any test data from this monitoring requirement or tests performed
by the North Carolina Division of Water Quality indicate potential impacts to the receiving stream, this permit
may be re -opened and modified to include alternate monitoring requirements or limits.
NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control
organism survival, minimum control organism reproduction, and appropriate environmental controls,
shall constitute an invalid test and will require innuediate follow-up testing to be completed no later than
the last day of the month following the month of the initial monitoring.

NPDES PERMIT
DRAFT / FINAL
CHECKLIST
FILE CONTENTS: Facility E? `C"XL G-vy
� � Permit No.
Le id �-eT` kT �Ul0
New Tracking Slip.
❑ Old Tracking Slip.
NPDES Permit Writer: -
Right side:
❑ Streamline Package Sheet
tream ' ed)
(to region/Sheet
Draft Permit Cover Letter.
(add newt; s arize major ch es to permit)
aft Permit
(order: col ent, map, effluent s ets, special conditions)
L9 Facility Map
(E-Map: ility Outfalls; U and sample locations)
E / Fact Sheet.
(documeriter's issues and re issue logic)
LH Permit Writer's Notes
(if not in et -- chronology, strategy, DMR Review, RPA, etc.)
9 Staff Report from Region
(as approot needed if streamlined)
,-Old Permit
(Text, Effluent Sheets and Special Conditions)
"ermit Application.
(New Permit or Renewal; any additional permittee correspondence)
U Acknowledgement Letter
(NPDES Unit written response to Renewal Application)
❑ Responses
(to acknowledgement letter, if any)
IT_,,
Igam Waste Load Allocation
(reference date; notes if recalculated for current action)
Note: Italics indicate sppeecci�al�conditio n always required or pplicable.
f;\VF CR3L`(�tR�C F�tr.IJr�
R'
Sub fitted to for Peer Review: Date 1 �ilYr�� . Admin cutoff �3�1vC3
:' Peer Review completed by �� Date
�ZerrmtQ;
lic Notice System Update ✓ BIMS Update:Eventss E-Mailed to VReioV, aJ by V rt `--�-' 1 Date y J
m' RRegionalOffi`c`eARe`vie(wccoompletedbby�Cezv�� p 44�Ji Date
A (Submitted to U PYL�L / c&tre2 "t for Public Notice on : Notice Date
c7r
Q/'Additional Review by 1br ��I initiate�d-by�J Dale 7
3-`Additional Reviewcompletedby �Y FW �J Cd c N® / I�� on: Date
B' FINAL to D;WwL3eUduc�H LSu�saerWilson for signature on 6�G%�Letter Dated
l2r�Additional Review
❑ Additional Review
l9--�Final Files transferred to Server (Permits Folder) U

Draft Permit Reviews (5)
Subject: Draft Permit Reviews (5)
Date: Mon, 22 Sep 2003 14:53:57 -0400
From: John Giorgino <[e-mail]>
To: Joe Corporon <Joe.Corporon@ncmaiLnet>
Hi Joe, I have reviewed the following draft permits:
NCO026816 Town of Roseboro WWTP
NCO084395 Weston, Inc. - ABC One -Hour Cleaners
NCO025054 Oxford WWTP
NCO086380 BP Service Station
NCO065081 Cogentrix
I have no comments concerning the tox sections. Sorry for the delay.
-John
I of 1 9/22/03 3:04 PM

State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
Michael F. Easley, Governor
William G. Ross, Jr., Secretary
Alan W. Klimek, P.E., Director
August 13, 2003
NCDENR
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
MEMORANDUM APCEIVEO
N.C.06W- :�' EHNR
To: Lee Spencer AUG 2 6 2003
NC DENR / DEH / Regional Engineer
Winston-Salem Regional Office W i n s t o n- S cl i e m
From: Joe Corporon Regional UfficG
NPDES Unit
Subject: Review of Draft NPDES Permit NCO086380
BP Oil Company — BP Oil Service Station 24154 GM REM
Guilford County
Please indicate below your agency's position or viewpoint on the draft permit and return this form by September
19, 2003. If you have any questions on the draft permit, please contact me at the telephone number or e-mail
address listed at the bottom of this page.
NVM/NJNJANANANNJNJM�ANM�ANANANMI µ����AN����M/M/IWM�NJM�M�M�/,NM1NµM�M�ANNJ
RESPONSE: (Check one)
Hroncur with the issuance of this permit provided the facility is operated and maintained properly, the stated
effluent limits are met prior to discharge, and the discharge does not contravene the designated water quality
standards.
❑ Concurs with issuance of the above permit, provided the following conditions are met:
❑ Opposes the issuance of the above permit, based on reasons stated below, or attached:
1617 Mail Service Center, Raleigh, North Carolina 27699-1617 919 733-5083, extension 597 (fax) 919733-0719
VISIT us ON THE INTERNET@hhp:/ih2o.enr.state.nc.us/NPDES Joe.Corporon®ncmail.net

Ada 15994969
Dab O8/15/2003
PUBUC NOTICE
STATE OF NORTH CAROLNA
ENCOMM 9S O IL MAIN 60UNRNT
1617 MAIL SERVICE CENTER
RALEIGH. NC 21899 1817
NOTIFICATION OF INTENT TO
ISSUE A NPDES
WASTEWATER PERMIT
0
Written
Water
hold a
Time }01 PM New. & Record
Pnblidhed by
News& Record. Ise.
Greemboeo, North Carolina e
Nme C—,-. f.uilfwd Courry Affidavit of Publication YINW)
Bcfen, the undosseped, a Notary Public of said County and Slam, duly communicated. quatified and authonzd by law to administer oaths
personally appwred the Publisher, Repyiacrosive who being firs duly sworn, dryoved and says.
1. That he'she is the Publishers Representative ofthe Grnensbom News & Record, Iva, a corporation, engaged in the publicaion of
newspapers ktsown as "News & Record". published, issued and entered as second class mail in the City afGrncesto o in said Counry and Stan
3. That hdshc is emhouzed to make this affidavit and sworn notenum; that the notice or other legal advedisemrnt, a copy, of which is nnechc
hercut, wo publishedin the News & Reci rel on the above listed dams.
3. That the said newspaper (or newspapers) in which such Trades, Pei document, or legal advertisement was p thiishd was, at the time of
cich end every such publication, a newspaper meeting all ofthe requirements and qudifications of Session 1-597of the General Statutes of
Noah Carolina and was n qualifid newspaperwhin the meaning of Section 1-597ofthe General Sutures of NwM Grolw.
degas of public interest.
Copies of the draft permit and
other supporting Information wag
on file used to calamine can-
dltlons present in the draft
permit are Try a liable upon re. NCOENR/0WpT1POE5
quest and payment of the
costs of reproduction. Mail
of
p.m, to review Information on
file.
SP ON Company 1NCO086380)
has requested renewal of its
NPDES permit discharging to
an unnamed tributary to
Norsepen Creek within the
Cape Fear River Basin. The
discharge parameter 1.1
dlcmoroemyene is water quay
Ity limited. This discharge may
affect future wasleload alloca
tons to This recaving stream.
Ad shown is not actual print size
PubLyMa Repmannew
Sworn m and aubawibrd bean as, edrdayar a,Ayl .RW3. VALERIE McNEIL
(3 NOTARY PUBLIC
BUILFORO COUNTY. NC
Y01\ 1 1 P_I l L a I. Commlssinn Ea,m 0 23-NM
Ngpy Public L
My Possession uPrw: Areal D. 1m3
"aa 90 Edition Swu P2 Airr�t
59.959 0&II103 Nwn&Remrd 400 NC00083380 PUBLIC NOTICESTATE
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AUG 2 0 20M

DENR/D W Q
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
Facility Information
Applicant/FacilityApplicant/Facility Name
BP Oil Company/ BP Service Station 24154, Greensboro, NC
Permit No.
NCO086380
Permitted Flow:
0.0072 MGD
Facility Class:
I
Facility/Permit Status:
(i.e. New, Modification, Existing or
Renewal)
Renewal
County:
Guilford
Stream Characteristics
Receiving Stream:
Guilford College Pond -- unnamed tributary to Horse en Creek
Stream Classification:
WS III, B, NSW
Subbasin:
030602
Drainage Area (mi2):
0 (see below for explanation)
Summer 7Q 10 (cfs)
0
Winter 7Q10 (cfs):
0
30Q2 (cfs):
0
Average Flow (cfs):
0
IWC (%):
100 (discharge to storm sewer)
Miscellaneous
Regional Office:
Winston-Salem
USGS To o Quad:
C 19 SW
Treatment System Components. Components to this groundwater remediation system consist of a
product-phase/water separator, influent sampling port, low profile air stripper, transfer pump, flow
totalizer, and emergency trips and controls. Prior to issuing the previous permit, the Division
recommended a strainer or particulate filter prior to air stripper and a granulated active carbon
(GAC) filter following air stripper (Timothy Black, WSRO).
Receiving Stream. This facility discharges via a storm drain to the swimming pond at Guilford
College, an unnamed tributary to Horsepen Creek, [segment 16-11-5-1 (1)]. This segment is
classified WS-III, B, NSW.
WLA Summary. This treatment system requires an individual NPDES permit because contaminants
of concern include carcinogenic chlorinated solvents (not just gasoline and diesel fuel), and also
because of stream classifications as WS (water supply) and B (swimming). This Class I treatment
facility is designed to produce 0.0072 MGD to remediate groundwater contaminated by leaky
underground storage tanks. While flow was not limited in the previous permit, 0.0072 MGD has
been added as a permit limit for renewal. This flow was used to establish "reasonable potential" for
each parameter of Concern (POC) based on monthly data from Discharge Monitoring Reports
(January 2001 through June 2003). To establish reasonable potential, the Division compared each
parameter's predicted maximum to both freshwater criteria and water supply (WS) criteria,
choosing whichever criteria was lower to be environmentally conservative (Table 2). Renewal
permit limits were adjusted according to the RPA. Total Suspended Solids (TSS) remain limited at
30.0 mg/L (Daily Maximum) based on groundwater remediation permit policy.
Page 1 of 3

DENR/DWQ
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
Proposed Schedule for Permit Issuance
Draft Permit to Public Notice:
Permit Scheduled to Issue:
State Contact
If you have any questions
contact Joe Cmporon (9y
NPDES
Joe
August 13, 2003
October 6, 2003
information or on the attached permit, please
)n 597.,
Date: 4 JGW
Regional Recommendation by: t Date: as 3
Regional Supervisor:
NPDES Unit Supervisor:
Page 3 of 3
Date:

DENR/D W Q
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
Table 2. BP Oil, Station 24154 GW Remediation -- RYA Findings and Renewal Action
Parameter
Samples
Hits
Maximum
Criteria/
RP`
Comments / Renewal
(n)
(n)
Predicted
Allowable
y/n
Action for parameters of
Concentration
concern (POCs) **
Benzene
17
0
Not
1.19 µg/L
-
Delete limit from permit -
detected.
POC continue monitoring
Monthly
1,2 DCA
19
0
Not
0.38 µg/L
-
POC
detected.
continue monitoring 2/Month
1,1 DCE
18
1
0.7 µg/L
0.057 µg/L
Yes
Add limit to permit -
POC continue monitoring
Monthly
Ethylbenzene
19
0
Not
520 µg/L
-
POC
detected.
continue monitoring Monthly
Fluorine
19
0
Not
1300 µg/L
-
POC
detected.
continue monitoring Monthly
Lead
19
1
10.8 µg/L
25 µg/L
No
POC
continue monitoring Monthly
Naphthlene
19
0
Not
78 µg/L
-
POC
detected.
continue monitoring Monthly
Phenanthrene
19
0
Not
370 µg/L
-
POC
detected.
continue monitoring Monthly
MTBE
19
5
2328.2 µg/L
No freshwater
-.
POC
criteria
continue monitoring Monthly
Oil &Grease
17
0
Not
30 mg/L
-
POC
detected.
continue monitoring Monthly
Phenol
19
0
Not
1.0 µg/L
-
POC
detected.
continue monitoring Monthly
TCE
19
1
0.81 µg/L
3.08 µg/L
No
POC
continue monitoring Monthly
Toluene
17
0
Not
11 µg/L
-
Delete limit from permit -
detected.
POC continue monitoring
Monthly
Xylene
19
0
N
780 µg/L
-
POC
detectot ed.
continue monitorin Monthl
*Rndicate "Reasonable Potential' to exceed instream Water Quality Standard. If parameter is
not detected, RP is not possible.
**POC = These POCs do not usually occur in the natural environment and influent concentrations exceed
standards and/or criteria. Therefore, continued monitoring will be required regardless of reasonable
potential.
Summary of Renewal Changes
Parameter
Proposed Changes
Basis for change(s)
Benzene
Delete permit limit
No reasonable potential
Toluene
Delete permit limit
No reasonable potential
1,1 DCE
Add permit limit
Data show reasonable potential
Page 2 of 3

NC DENR - DIVISON OF WATER QUALITY 2B .0300
.0311 CAPE FEAR RIVER BASIN
Classification
Name of Stream Description Class Date Index No.
Giles Creek
From source to Haw River
C NSW
O8/03/92
16-9
Reedy Fork
From source to a point 0.4
WS-III
NSW
08/03/92
16-11-(1)
mile downstream of Moores
Creek
Beaver Creek
From source to Reedy Fork
WS-III
NSW
O8/03/92
16-11-2
Moores Creek
From source to Reedy Fork
WS-III
NSW
08/03/92
16-11-3
Reedy Fork (including
From a point 0.4 mile
WS-III
NSW CA
08/03/92
16-11-(3.5)
Lake Brandt and Lake
downstream of Moores Creek
Townsend below normal
to Lake Townsend Dam (City
operating levels)
of Greensboro water supply
intake)
Brush Creek
From source to a point 0.5
WS-III
NSW
OB/03/92
16-11-4-(1)
mile downstream of Guilford
County SR 2190
Brush Creek (Lake
From a point 0.5 mile
WS-III
NSW CA
08/03/92
16-11-4-(2)
Higgins)
downstream of Guilford
County SR 2190 to Lake
Brandt, Reedy Fork
Horsepen Creek
From source to U.S. Hwy. 220
WS-III
NSW
O8103/92
16-11-5-(0.5)
Unnamed Tributary at
From source to dam at
WS-III8B NSW
O8/03/92
16-11-5-1-(1)
Guilford College
Guilford College bathing
lake
Unnamed Tributary at
From dam at Guilford
WS-III
NSW
08/03/92
16-11-5-1-(2)
Guilford College
College bathing lake to
Horsepen Creek
Horsepen Creek
From U.S. Hwy. 220 to Lake
WS-III
NSW CA
O8/03/92
16-11-5-(2)
Brandt, Reedy Fork
Long Branch
From source to a point 0.5
WS-III
NSW
08/03/92
16-11-6-(1)
mile upstream of mouth
Long Branch
From a point 0.5 mile
WS-III
NSW CA
08/03/92
16-11-6-(2)
upstream of mouth to Lake
Townsend, Reedy Fork
Richland Creek
From source to a point 0.5
WS-III
NSW
08/03/92
16-11-7-(1)
(Richland Lake)
mile upstream of dam at
Richland Lake
Richland Creek
From a point 0.5 mile
WS-III
NSW CA
08/03/92
16-11-7-(2)
(Richland Lake)
upstream of dam at Richland
Lake to Lake Townsend,
Reedy Fork
Squirrel Creek
Froom source to a point 0.4
WS-III
NSW
08/03/92
16-11-8-(1)
mile downstream of Guilford
County SR 1001
Squirrel Creek
From a point 0.4 mile
WS-III
NSW CA
08/03/92
16-11-8-(2)
downstream of Guilford
County SR 1001 to Lake
Townsend, Reedy Fork
Z

• CAPE FEAR RIVER BASIN
Name of Stream
Subbasin
Stream Index Number
Map Number
Class
Herds Creek
CPF14
18-23-16-3
F21SE5
WS-III
Herrings Marsh Run
CPF22
18-74-19-16
G27SW2
C Sw
Hester Lake
CPF01
16-6-2-3
B20SW4
WS-III NSW
Hewletts Creek
CPF24
18-87-26
K27NW6
SA HQW
Hiatt Branch
CPF08
17-3-1-(1)
C18SE9
WS-IV
Hiatt Branch
CPFOB
17-3-1-(2)
C18SE9
WS-IV CA -
Hickman Branch
CPF17
18-81-6-1-2
K26SE1
C Sw
Hickory Branch
CPF13
18-20-13-9
F23SW1
C
Hickory Creek
CPF08
17-8.5-(1)
D19NE1
WS-IV `
Hickory Creek
CPF08
17-8.5-(3)
D19NE1
WS-IV CA `
Hicks Branch
CPF19
18-68-2-6-1
H26NW3
C SW
Hide Branch
CPF13
18-20-13-3-2
F22SW6
C
Hill Creek
CPF04
16-38-2-(1)
E22NW2
C NSW
Hill Creek
CPF04
16-38-2-(2)
E22NW2
WS-IV NSW
Hobbs Pond
CPF19
18-68-1-14
H25NW6
C SW
Hoe Swamp
CPF19
18-68-2-1
G25NES
C SW
Hog Branch
CPF04
16-27-2
C22SWS
WS-II HQW NSW
Holly Shelter Creek
CPF23
18-74-33
I28NWB
C SW
Honey Creek
CPF23
18-74-48
J27NE4
C SW
Hood Creek
CPF17
18-66
K26NE1
C Sw
Hornet Swamp (Horner Swamp)
CPF19
18-68-1-17-3
G25SW1
C Sw
Horse Branch
CPF14
18-23-16-9
F22SW7
WS-III
Horse Branch
CPF23
18-74-55-1
I27SW1
C Sw
Horse Creek
CPF10
17-26-5-6-1
F20NE7
WS-III
Horse Creek
CPF14
18-23-14
G22NW4
WS-IIZ
Horse Pen Branch
v� \
` `
CPF13
18-20-20
F23SW5
C
Horse Pen Branch
_��t1
(/V`•
CPF21
18-74-3-1
G27NW4
C Sw
Horsepen Branch
CPF16
18-61-4-1
J25NE8
WS-IV Sw
Horsepen Branch
jg �l%
CPF19
18-68-1-17-12
H25SW2
C Sw
Horsepen Branch
�
CPF21
18-74-12
G27SE1
C Sw
/
Horsepen Branch
CPF22
1B-74-19-9-2
G26SE1
C SW
Horsepen Creek
CPF02
16-11-5-(0.5)
C19SW2
WS-III NSW
Horsepen Creek
CPF02
16-11-5-(2)
C19NE7
WS-III NSW CA
Housland Branch
CPF21
18-74-16
G27SE4
C Sw
Howard Channel
CPF24
18-87-13
J28SW2
SA ORW
Howard Pond
CPF19
18-68-1-17-7
H24NE3
C Sw
Howe Creek
CPF24
18-87-23
J27SE8
SA ORW
Hudson Branch
CPF04
16-27-4-1
D22NW2
WS-II HQW NSW
Hughes Creek
CPF07
18-4-7
E22SE4
WS-IV
Hughes Mill Creek
CPF02
16-14-6-1
B21SE8
WS-II HQW NSW
Hunting Branch
CPF04
16-28-2
D21NW9
C NSW
Hybarts Branch
CPF15
18-27-5-1-1
G23SW5
C
Indian Branch
CPF13
18-20-26-1
F23NE7
WS-Iv
Indian Creek
CPF05
16-41-1-18-(1)
D23SW5
WS-IV NSW
Indian Creek
CPF05
16-41-1-18-(2)
D23SW4
WS-IV NSW CA
Indian Creek
CPF10
17-35
E21SE4
WS-IV
Indian Creek
CPF16
18-46-4
I24NE2
C
Indian Creek
CPF17
18-70
J26SE4
C Sw
Indian Creek (Jessups
Pond)
CPF16
18-42-1
H24SW1
C
Ingle Branch
CPF03
16-19-5-2
C20SE6
C NSW
Intracoastal Waterway
CPF24
18-87
J29NW2
SA ORW
Intracoastal Waterway
CPF24
16-87-(5.5)
J28NE3
SA HQW
Intracoastal Waterway
CPF24
18-87-111.5)
J28SW2
SA ORW
Intracoastal Waterway
CPF24
18-87-(23.5)
K27NE2
SA HQW
Page 12 of 30

Facility None =
NPDBS # =
Qw (MGD) =
7Q10s(cfs)=
IWC(%)_
BP Oil
NC0086380
0
0
#DIV/0!
BINAL RESULTS
Total Phenols
Max. Prod Cw
Allowable Cw
10.8
0.0
RESULTS
Sld Dev.
1.3305
Mean
2.9
C.V.
0.4636
Number
of data points
19
HITS
0
Mall Factor =
1.97
Max. Value
5.5
Max. Pred Cw
10.8
Allowable Cw
#DIV/01
Units: ug/L
Date
n
<
Parameter=
Standard =
Actual Data
Total Phenols
BDL=1/2DL
0.000
Jan-01
Feb-01
1
<
2.0
1.0
Mar-01
2
<
I1.0
5.5
Apr-01
3
<
10.0
5.0
May-01
4
<
10.0
5.0
Jun-01
5
<
10.0
5.0
Jul-01
6
<
5.2
2.6
Aug-01
7
<
5.2
2.6
Sep-01
8
<
5.1
2.6
Oct-01
Nov-01
9
<
5.0
2.5
Dec-01
10
<
5.0
2.5
Jan-02
11
<
5.3
2.7
Feb-02
12
<
5.0
2.5
Mar-02
13
<
5.4
2.7
Apr-02
14
<
5.3
2.7
May-02
15
<
5.2
2.6
Jun-02
16
<
5.0
2.5
Jul-02
Aug-02
17
<
5.0
2.5
Sep-02
18
<
5.0
2.5
Oct-02
Nov-02
19
<
5.1
2.6
Dec-02
Jan-03
Feb-03
Mar-03
Apr-03
May-03

�p � (� c L iksC�dA73
Pr C�
DMR VIOLATIONS for: � [uL, -_ P1 ------
Permit: nc0086380 D�1MRs Betwee 1-2001 and003 Region: '-
r,__—-
Parameter Names FLOW, 80D, TSS, NH3
Report Date: 08/09/03 Page: 1 of 1 -
Violation Category Limit Violations CG&L REPORT
PERMIT: FACILITY: COUNTY: REGION:
VIOLATION UNIT OF CALCULATED
DMR OUTFALL LOCATION PARAMETER DATE FREQUENCY MEASURE LIMIT VALUE VIOLATION TYPE VIOLATION ACTION
12/31/69

CRA Engineering, Inc.
4215-1 Stuart Andrew Blvd., Charlotte, NC 28217
Telephone: [phone] Facsimile: 704.676.0704
CONESTOGA-ROVERS www.CRAworld.com
& ASSOCIATES
December 21, 2000
Mr. Charles H. Weaver, Jr.
North Carolina Department of Environment and Natural Resources
Division of Water Quality / NPDES Unit
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
Dear Mr. Weaver:
Re: NPDES Permit Renewal
Groundwater Remediation System
BP Service Station No. 24154
5601 W. Friendly Avenue
Greensboro, North Carolina
NPDES Permit No. NCO086380
Reference No.24288-11
pI � � NOd�N
DEC 2 9 2n
DENR - WATER DUALITY
POINT SOURCE BRANCH
Conestoga -Rovers and Associates (CRA), on behalf of BP Oil Company (BP), submits the
enclosed information in response to your letter dated November 29, 2000. By this letter and
attached information, we request renewal of the referenced permit. The following items are
attached (all are submitted in triplicate):
1. A completed application form (Short Form C-GW).
2. A description of the sludge management plan for the facility (below).
3. A copy of the USGS topographical map for the facility, showing the outfall.
4. A description of discharge alternatives (taken from a previous report).
5. A table showing the most recent analytical data for the site (take from a recent report).
The remediation system does not generate a "sludge'. The carbon vendor recycles spent
activated carbon. Filters that remove particulate matter (dust) from the air prior to
blowers/compressors are disposed of as solid waste; as are filters used to remove particulate
matter, largely iron and manganese precipitates, from the water prior to carbon filtration.
Since installing the remediation system, no significant changes have been made to the treatment
scheme or treatment units.
Worldwide Engineering, Environmental. Construction, and IT Services

CONESTOGA-ROVERS
& ASSOCIATES
December 21, 2000
Reference No. 24288-11
On behalf of BP, we request that you renew the referenced permit. If you have any questions or
comments, please contact us at [phone].
Yours truly,
CONESTOGA-ROVERS & ASSOCIATES
1- tt- f�',
John B. Uteck
Project Manager
// to _
O—'
°° CAR�(91''42f�ccJ
off'
Jerry W. Eplin SEAL 9l
;
Regional Manage20144
..m� m
ao,''f'�p E
Encl.
W
°a°98111's
Worldwido Engineering, Environmental, Conehuedon, and IT Servleoe

NPDES PERMIT APPLICATION - SHORT FORM C-GW
To be filed by persons engaged in groundwater remediation projects
N. C. Department of Environment and Natural Resources
Division of Water Quality / NPDES Unit
1617 Mail Service Center, Raleigh, NC 27699-1617
NPDES Permit NC00 S 63 BO
Please pl7nt or type
1. Applicant and facility producing discharge
A. Name 6P Oil— COMPANY
B. Mailing address of applicant:
1. Street address 2Y75 NoRi`il W11Vb5 PAR KwAyy STE NOD
2. City ALPAAQETrA 3. County
4. State G EoQGI A 5. Zip Code 300011
Telephone Number (77a) 676 — 309a
Fax Number ( 770 ) S76 — 365Z
e-mail address: Sck ae-p I + @ RP, CoM
C. Location of facility: n
1. Street 5601 W Bs r FR i 6 iusi If f-1veAwE
2. City 6Ftren r{o2r� 3. County Gu,LFoea
4. State A1oRYtt CAaot-I&A- 5. Zip Code 27y /a
Telephone Number ( 77o ) 576 - -!> 2
Fax Number ( 7.7,0) . 976 — o.FSZ
2. Standard Industrial Classification (SIC) code(s) (if known):
3. This application is for a: ❑ New Permit Permit Renewal ❑ Permit Modification
4. Product(s) recovered (circle all that apply): Gasoline Diesel fuel Solvents
Other (describe)
S. (a) Check here if discharge occurs all year, , or
(b) Circle the month(s) in which discharge occurs: January February March April
May June July August September October November December
(c) Days per week discharge occurs:
6. Volume of wastewater discharged to receiving stream(s): 7i 20o MkXrMlrNt GPD*
*Gallons per operating day
7. Check here if wastewater is discharged directly to the receiving stream(s) ❑
If not, state the specific discharge location: D N— S i rE 5 T,601 S E'W t R
Mark the path taken by the wastewater to the receiving stream(s) on the site map. If a storm sewer is the only viable
means of discharge, trace the route of the storm sewer to its discharge point(s).
Short Form C-GW Version 9-99

NPDES PERMIT APPLICATION - SHORT FORM C-GW
To be filed by persons engaged in groundwater remediation projects
8. Number of separate discharge points: -1—
NOTE: If the facility has separate discharge points (outfalls), include a schematic diagram of
wastewater flow at the facility.
9. Name of receiving water(s): v "eri f RoSorARY i a MBE PCti CRtc K 1A. 1 it E
CAot`' FEAQ 2tv6a_ 3 Sr4/
This application package must include the items listed below. This application will be returned if the
required items are not included.
d A USGS topographical map (or copy of the relevant portion) which shows all outfalls
A report of alternatives to surface water discharge as outlined by the Division's `Guidance for Evaluation of Wastewater Disposal
Alternatives" (required by 15A NCAC 21-1.0105 (c))
A summary of the most recent analytical results containing the maximum values for each chemical detected
Applications for new fun -permitted) discharges must also include the items listed below. This
application will be returned if the required items are not included.
❑ An engineering proposal describing the remediation project in detail (required by 15A NCAC 21-1.0105 (c))
❑ If the treatment system will discharge to a storm sewer, attach written approval from the municipality responsible for the sewer.
❑ A list of any chemicals found in detectable amounts at the site, with the maximum observed concentration reported for each chemical
(the most recent sample must be collected less than one year prior to the date of this application)
❑ A summary of analytical results containing the maximum values for each chemical detected
❑ The removal efficiency of each compound detected (if known)
For fuel remediation projects, analyses for volatile organic compounds (VOCs) should be performed. Analyses for any fuel additives likely
to be present at the site should also be performed. At minimum, analyses should be performed for the following compounds:
benzene" toluene' ethylbenzene' xylene' lead methyl tert-butylether (MTBE) dibromoethane (EDB)
1,2-dichloroethane isopropyl ether napthalene phenol
('an EPA -approved method capable of detection levels to 1 ppb should be used to detect these compounds).
For solvents or unidentified proiects, an EPA Method 624/625 analysis should be performed. The data submitted with this application
should include the ten largest peaks not identified as targeted compounds and not present in the procedural blank. These peaks should be
identified and approximately quantitated (as per the same restrictions found on the NC DENRIDWQ Annual Pollutant Analysis
Monitoring (APAM) Requirement - Reporting Form A).
If metals or Pesticides are suspected to be present, these compounds should be analyzed to the same detection level as presented in the
NC APAM.
I certify that I am familiar with the information contained in the application and that to the best of
my knowledge and belief.such information is true, complete, and accurate.
- I M T. ifAtE FPc-c �Ny;^wN tcn rA�fSvsiNcSs I'ISNA6 +�
Printed name of Person Signing Title
of Applicant
Date
North Carolina General Statute 143-215.6 (b)(2) provides that: Any person who knowingly makes any false statement representation, or certification in
any application, record, report, plan, or other document files or required to be maintained under Article 21 or regulations of the Environmental Management
Commission implementing that Article, or who falsifies, tampers with, or knowingly renders inaccurate any recording or monitoring device or method
required 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 exceed $10,000, or by imprisonment not to exceed six months, or by both.
If 8 U.S.C. Section 1001 provides a punishment by a fine of not more than $10,000 or imprisonment for not more than 5 years, or both, for a similar
offense.)
Short Form C-GW Version 9-99

G&E ENGINEERING
ENVIRONMENTAL CONSULTANTS
4105-C STUART ANDREW BOULEVARD • CHARLOTTE, NC 28217 • [phone] • FAX [phone]
March 11, 1998
Mr. Damian L. Edwards
Team Leader
Environmental Remediation Management
BP Oil Company
2555 Westside Parkway, Suite 300
Alpharetta, Georgia 30004-9951
RE: NPDES Notice of Intent Documentation
BP Service Station No. 24154
5601 West Friendly Avenue
Greensboro, Guilford County, North Carolina
Groundwater Incident No. 8271
G&E File: 24288-03
Dear Mr. Edwards:
G&E Engineering (G&E) has assembled the NPDES Notice of Intent documentation for
the referenced BP Oil Company facility for discharging treated groundwater effluent into
the City of Greensboro storm sewer system. The documentation includes applicable
sections of the North Carolina Department of Environment and Natural Resources
(NCDENR) approved Corrective Action Plan Addendum (CAPA).
ALTERNATIVES TO STORM SEWER DISCHARGE
The following alternatives to storm sewer discharge of the treated effluent were
evaluated and determined to be impracticable.
Discharge to Sanitary Sewer. This option was initially considered the most
practicable disposal method for the treated effluent; however, the City of
Greensboro will not accept any new groundwater effluent connections due to
flow restrictions at the T. Z. Osborne Wastewater Treatment Facility. A copy of
the correspondence from the City of Greensboro is presented as Attachment A.
Subsurface re -injection. This option was considered and rejected due to the
areal extent of the dissolved hydrocarbons beneath the site. Re -injection of the
treated effluent at any on -site location will limit the effectiveness of groundwater
A Division of TreaT2 - CRAn Company

G&E ENGINEERING
Mr. D. L. Edwards
March 11, 1998
G&E File: 24288-03
Page -2-
recovery design by pushing hydrocarbon -impacted groundwater away from the
recovery wells.
Spray Irrigation. This option was considered and rejected due (1) the limited
size of the site and (2) the limited unpaved areas on -site (over 95 percent of the
site is paved).
Therefore, based upon the impracticability of the evaluated options, no cost analyses
were performed.
STORM SEWER DISCHARGE LOCATION
The location of the storm sewer discharge to surface water is shown on an USGS
topographic map in Attachment B. The storm sewer discharges into an unnamed pond
located approximately 1,500 feet north of the site. Surface water in the unnamed pond
discharges directly into Horse Pen Creek. (Verbal communication, Mr. John Malegue,
City of Greensboro, and Mr. D. S. Hill, G&E, March 4, 1998.)
GROUNDWATER ANALYTICAL MONITORING DATA
A summary of the laboratory analytical results for groundwater samples collected from
the monitor wells associated with the site from 1993 through 1996 and from the effluent
samplescollected during a pilot test in 1997 are presented in Attachment C (CAPA
Tables 3 and 8).
GROUNDWATER TREATMENT SYSTEM
The revised treatment system specifications section from the CAPA (revised Section
5.7.9) is presented below. Additionally, revised Figures 11 through 19, Appendix N
DPVES Treatment Criteria, and revised Appendix P Total Dynamic Head Estimations,
Pump Curves, and Effluent Discharge Line Specifications from the CAPA are included
as Attachments D through F.
5.7.9 Treatment System The treatment system shall be placed within the treatment
equipment enclosure as specified hereinafter and as shown on the drawings.
Phase/Water Separator. The phase/water separator (or oil/water separator) shall
be a coalescing -type separator configured to (1) accept a total influent flow rate of
up to 5 gallons per minute (gpm) from pumps P-1 through P-4, and P-6 (height of

SUMMARY OF LABORATORY ANALYTITABLES
CAL RESULTS FOR GROUNDWATER SAMPLES
BP SERVICE STATION NO.24154
5601 WEST FRIENDLY AVENUE
GREENSBORO, GUILFORD COUNTY, NORTH CAROLING
iro less roan sign (<) Indicates that the parameter was not detected. The number following the °<°sign is the detection limit for the analysis of the
Parameter.
2) pg/- - Micrograms per liter.
3) NL - No groundwater action level listed.
4) LNAPL - Light non -aqueous phase liquids present on the groundwater surface; therefore, well was not sampled.
5) Only the constituent parameters detected by the various analytical methods are presented herein.
6) NE - Alternate groundwater cleanup level not established.
7) Laboratory data may contain qualifiers, see the laboratory report for details.
8) Naphthalene may have been analyzed by EPA Methods 8260 and 8270. Where naphthalene was detected, the higher concentration is presented.
Where naphthalene was not detected, the lowest detection limit is presented.
24288-11(4) T6
PAGE 1 OF 1
CONESTOGA-ROVF:QQ n. A0c1 .1. _

SOURCE: U.S.G.S. 7.5 MINUTE SERIES
GREENSBOR
o �U
SITE
0 feet 2000
SCALE
0;S G&E ENGINEERING, INC.
�"
ENVIRONMENTAL CONSULTANTS
UJVS NTOPOGRi"HIC pOqP ORANCN
28

State of North Carolina
Department of Environment
and Natural Resources A
�Division of Water Quality
James B. Hunt, Jr., Governor
Wayne McDevitt, Secretary D E N R
A. Preston Howard, Jr., P.E., Director
February 15, 1999
Ms. Susan Sharp
BP Oil Company
2555 Westside Parkway, Suite 300
Alpharetta, Georgia 30004-9951
Subject: Permit NCO086380
Authorization to Construct
Groundwater Remediation System
Service Station 24154
Guilford County
Dear Ms. Sharp:
The Division received a permit application and request for an Authorization to Construct on
March 27, 1998 and a complete package was received by September 10, 1998. Final plans and'
specifications for the subject project have been reviewed and found to be satisfactory. Authorization is
hereby granted for the construction and installation of a groundwater remediation system, consisting of a
phase/water separator, influent sampling port, particulate filter, low profile air stripper, and granular
activated carbon filter, transfer pump, flow totalizer, and emergency trips and controls. This system will
discharge to an unnamed tributary to Horse Pen Creek (Class WS III & B NSW) in the Cape Fear Basin.
The particulate filter and granular activated carbon units were not included in the original design
for the treatment system but will be included the final system. Specifications and supporting
information for these units have been submitted and approved.
This Authorization to Construct is issued in accordance with Part III, Paragraph A ofNPDES
Permit NCO086380 issued December 7, 1998 and shall be subject to revocation unless the wastewater
treatment facilities are constructed in accordance with the conditions and limitations specified in Permit
NC0086380.
Any sludge generated from this treatment facility must be disposed of in accordance with G.S.
143-215.1 and in a manner approved by the North Carolina Division of Water Quality.
In the event that the facility fails 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.
The Winston-Salem 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.
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone]FAX [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled/ 10% post -consumer paper

Ms. Sharp
February 15, 1999
NC0086380/AC0086380
Page 2
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, this Authorization to Construct and the approved plans and
specifications. Mail the Certification to:
Ms. Kim Murphy
NC DENR- DWQ - NPDES Unit
P.O. Box 29535
Raleigh, NC 27626-0535.
The Permittee, for the life of the facility, shall maintain a copy of the approved plans and
specifications on file.
Failure to abide by the requirements contained in this Authorization to Construct may subject the
Permittee to an enforcement action by the Division of Water Quality in accordance with North Carolina
General Statute 143-215.6A to 143-215.6C.
The issuance of this Authorization to Construct does not preclude the Permittee from complying
with any and all statutes, rules, regulations, or ordinances which may be imposed by other government
agencies (local, state, and federal) which have jurisdiction.
One (1) set of approved plans and specifications is being forwarded to you. If you have any
questions or need additional information, please contact Paul Clark, telephone number [phone]
extension 580.
Sincerely,
Original Signed By
David A. Goodrich
A. Preston Howard, Jr., P.E.
cc: Central Files
Winston-Salem Regional Office, Water Quality
Technical Assistance and Certification Unit
Point Source Compliance/Enforcement Unit
Dan Huff, BP Oil Company

State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
James B. Hunt, Jr., Governor
Wayne McDevitt, Secretary
A. Preston Howard, Jr., P.E., Director
February 15, 1999
Ms. Susan Sharp
BP Oil Company
2555 Westside Parkway, Suite 300
Alpharetta, Georgia 30004-9951
L Z
�Aii
NCDENR
NORTH CAROUNA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
Subject: Issuance of NPDES Permit NCO086380
BP Station 24154 — Remediation system
Guilford County
Dear Ms. Sharp:
The Division received your application for a wastewater discharge permit on September 10, 1998.
Division personnel have reviewed and approved your application. Accordingly, we are forwarding the attached
NPDES discharge permit. This permit is issued pursuant to the requirements of North Carolina General Statute
143-215 .1 and the Memorandum of Agreement between North Carolina and the U.S. Environmental Protection
Agency dated December 6, 1983, and as subsequently amended.
If any parts, measurement frequencies or sampling requirements contained in this permit are
unacceptable to you, you have the right to an adjudicatory hearing upon written request within thirty (30) days
following receipt of this letter. This request must be in the form of a written petition, conforming to Chapter 150B
of the North Carolina General Statutes, and filed with the Office of Administrative Hearings, Post Office Drawer
27447, Raleigh, North Carolina 27611-7447. Unless such demand is made, this decision shall be final and
binding.
Please note that this permit is not transferable except after notice to the Division. The Division may
require modification or revocation and reissuance of the permit.
This permit does not affect the legal requirements to obtain other permits which may be required by the
Division of Water Quality 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 Paul Clark at telephone number (919)
733-5083, extension 580.
Sincerely,
Original Signed By
David A Goodrich
A. Preston Howard, Jr., P. E.
cc: Central Files
Winston-Salem Regional Office/Water Quality Section
Mr. Roosevelt Childress, EPA
NPDES Unit
Point Source Compliance Enforcement Unit
Aquatic Toxicology Unit
Dan Huff / BP Oil Company
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled / 10% post -consumer paper

c
Permit NCO086386
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provision of North Carolina General Statute 143-215.1, other lawful standards
and regulations promulgated and adopted by the North Carolina Environmental Management
Commission, and the Federal Water Pollution Control Act, as amended,
BP Oil Company
is hereby authorized to discharge wastewater from a facility located at
BP Station 24154
5601 West Friendly Avenue
Greensboro
Guilford County
to receiving waters designated as an unnamed tributary to Horse Pen Creek in the
Cape Fear River Basin
in accordance with effluent limitations, monitoring requirements, and other
conditions set forth in Parts I, II, III and IV hereof.
This permit shall become effective April 1, 1999.
This permit and authorization to discharge shall expire at midnight on May 31, 2001.
Signed this day February 15, 1999.
Original Signed By
David A. Goodrich
A. Preston Howard, Jr., P.E., Director
Division of Water Quality
By Authority of the Environmental Management Commission

4
A(1). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
Permit No. NC0086380
During the period beginning on the effective date of the permit and lasting until expiration, the Permittee is authorized to discharge wastewater
from groundwater remediation system from outfall serial number 001. Such discharges shall be limited and monitored by the Permittee as
specified below:
is ;EFFLUENT,CNARACTERISTICS o
` ,
,
- ,EFFL'UENTiLIMITATIONS
MONITORING REQUIREMENTS'
s �; on y,
Average,.c.r
We Y��t�>
Average'z,
Dail y. I
.rtMaximum,� i
easuremen �#
Frequency= �
amp a
s'"Type
, >2 amp
R1,�Locatilon<,r.•,
e�.t
Flow
Continuous
Recorder
Ettluent
otal buspendedo i s
mg
on y
ra
uen
Oil and Grease
Monthly
ra
uen
enzene
1.19 ug
Monthly
Gna
uent
o uene
ug
on y
ra
uen
y enzene
on y
ra
uen
y ene
Monthly
Grab
Ettluent
Methyl e - uEther
on y
ra
uen
ea
on y
ra----EffFu—en-[--
1,2 Dichloroethane
Monthly
ra
uen
uorene
Monthly
ra
uen
ap a ene
Monthly
ra
uen
enan rene
on y
ra
uen
Phenol
on y
ra
uen
ron
Monthly
Grab
E uen
Manganese
Momnly-Grab
uen
is oroe ene
on y
ra
uen
nc oroe ene
on y
ra
uen
e y ene one
on y
ra
uen
Chronic Toxicity
ua er y
--Tra
uen
Notes:
discharge is not continuous, flow may be monitored weekly an instantaneous flow estimate.
2 Where possible, the grab sample for oil and grease should be skimmed from the surface of a quiescent (calm water) zone.
a Chronic Toxicity (Ceriodaphnia), P/F at 90%. Monitoring, Qu rterly during months February, May, August, and November, See Supplement to Effluent
Limitations and Monitoring Requirements Page - Special Co ditions A (2).
The Permittee may request that monitoring requirements be
There shall be no discharge of floating solids or visible foam in
after at least one year of effluent data has been collected.
amounts.

Permit No. NCO086380
SUPPLEMENT TO EFFLUENT LIMITATIONS
AND MONITORING REQUIREMENTS
SPECIAL CONDITIONS
A(2). CHRONIC TOXICITY PASS/FAIL PERMIT LIMIT (QRTRLY)
The effluent discharge shall at no time exhibit chronic toxicity using test procedures outlined in the "North
Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure," Revised November 1995, or subsequent
versions.
The effluent concentration at which there may be no observable inhibition of reproduction or significant
mortality is 90 % (defined as treatment two in the procedure document). The permit holder shall perform
uaarrmonitoring using this procedure to establish compliance with the permit condition. The tests will be
performed during the months of February, May, August, and November. Effluent sampling for this testing
shall be performed at the NPDES permitted final effluent discharge below all treatment processes.
All toxicity testing results required as part of this permit condition will be entered on the Effluent Discharge
Monitoring Form (MR-1) for the month in which it was performed, using the parameter code TGP3B.
Additionally, DWQ Form AT-1 (original) is to be sent to the following address:
Attention: Environmental Sciences Branch
North Carolina Division of
Water Quality
4401 Reedy Creek Road
Raleigh, North Carolina 27607
Test data shall be complete and accurate and include all supporting chemical/physical measurements performed
in association with the toxicity tests, as well as all dose/response data. Total residual chlorine of the effluent
toxicity sample must be measured and reported if chlorine is employed for disinfection of the waste stream.
Should there be no discharge of flow from the facility during a month in which toxicity monitoring is required,
the permittee will complete the information located at the top of the aquatic toxicity (AT) test form indicating
the facility name, permit number, pipe number, county, and the month/year of the report with the notation of
"No Flow" in the comment area of the form. The report shall be submitted to the Environmental Sciences
Branch at the address cited above.
Should any single quarterly monitoring indicate a failure to meet specified limits, then monthly monitoring will
begin immediately until such time that a single test is passed. Upon passing, this monthly test requirement will
revert to quarterly in the months specified above.
Should the permittee fail to monitor during a month in which toxicity monitoring is required, then monthly
monitoring will begin immediately until such time that a single test is passed. Upon passing, this monthly test
requirement will revert to quarterly in the months specified above.
Should any test data from this monitoring requirement or tests performed by the North Carolina Division of
Water Quality indicate potential impacts to the receiving stream, this permit may be re -opened and modified to
include alternate monitoring requirements or limits.
NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control
organism survival, minimum control organism reproduction, and appropriate environmental controls, shall
constitute an invalid test and will require immediate follow-up testing to be completed no later than the last day
of the month following the month of the initial monitoring.

©L
NCDENR
JAMES B. HUNT JR. `
GOVERNOR
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF ENVIRONMENTAL HEALTH
PUBLIC WATER SUPPLY SECTION
January 14, 1999 " W%..
�p31123¢S
MEMORANDUM`
fi� �
O
TO: Mr. David Goodrich
NPDES Permits Group Leader
Discharge Permits Unit
Division of Water Quality
FROM: �l
FROM: Linda C. Sewall,"Director
Division of Environmental Health
SUBJECT: Application for a National Pollutant Discharge
Elimination System Permit NCO086380
BP Oil Company - BP Service Station No. 24154
Guilford County
N41 !3 1999
Reference is made to the above application for a National Pollutant Discharge
Elimination System Permit. We have reviewed this proposal and offer the
following comments.
We do not object to the issuance of this permit provided the facilities are
operated and maintained properly, the stated effluent limits are met prior to
the discharge, and the discharges do not contravene any designated water
quality standards.
If we can be of further assistance, please contact us.
LS/LGS
P.O. Box 29536, RALEIGH. NORTH CAROLINA 27626-0536
PHONE [phone]
DEN/COMPLIANCE SERVICES BRANCH FAX [phone] MAIN FAX [phone] LAM FORMS FAX [phone]
AN EQUAL OPPORTUNITY / AFFIRMATIVE ACTION EMPLOYER - 50% RECYCLED/10% POST -CONSUMER PAPER

NEWS & RECORD
Published by
News & Record, Inc. RECEIVED
Greensboro, North Carolina
I NOV 2 n 1998
NT North Carolina, Guilford County
AFFIDAVIT OF PUBLICATION DWOBUDGETOFFICE
On this basis Morough
Before the undersigned, a Notary Public of said
o staff
review and application of AM
Cie 2lofChapter 143 General
-
County and State, duly commissioned, qualified and
Statutes of
oe°omen
authorized by law to administer oaths, personally
lawful standards and regpla-
runs, the North Carolina Envi-
appeared Michele Hinnant who being first duly
renmemal Management Com-
mis'°"ic proposes to Issue
Tannto discharge to
a sworn deposes and says:
the / ._
4arsons listed below effective
2/7/98 and subject to special
conditions
� 1
1. That she is the Publishers Representatives of
Persons wishin to comment
upon or object fa the proposed
the Greensboro News & Record, Inc. a corpora-
daNrminations are invited
submit same in writing to the
to
tion, engaged in the publication of newspapers
above address no later than
11/23/98. All comments
m- known as -'News and Record" , published, ;..s-
cen ed prior to that data will
considered in the formulation
be
sued and entered as second class mail in -,the
of final determinations regact-
ingg the proposed penmt.
PuLGlic meeting may, ha need
A �'
City of Greensboro in said County and State,
l publiic intereIstn'ay used
2. That she is authorized to make this affidavit
permit.
and sworn statement; that the notice or other
A coy of the draft permit
available by writing orcalling
me Division of Environment
is
legal advertisement/ a true copy of which is
RaleleghE°t Norrth BOCaroina
attached hereto, was published in the
27626-0535, [phone].
NEWS & RECORD
the application and other imor-
matten may be inspected
at on the following dates:
Nose locations during normal
a Nice hours. Copies of the
information on file are mimn-
able °con request and
Mont of the costs of mproduo-
November 14 1998
/
tion. All such comments
or
requests regeriling a proposed
Porace
eraht ban make referethe NPDES permit
LATE: October 14 1998
for INTENT TO ISSUE A STATE NPDES PERMIT and
land A. GaodwicF
or A. Preston Howard Jr.
placed through NCDENR * DIVISION OF WATER QUALI-
.E.. Director
livisum of Environment Mgmt
TY
'ublic notice of infant N issue
State NPDES permit to Me
a
call°wing:
3. That the said newspaper (or newspapers) in
NPDES No NC0086380. BP
Oil, 2555 Westside Parkway,
which such notice, paper, document, or legal
Suite 300 C S. *1600 Alphar-
efte.CA30004-9951 This to-
advertisement was published was, at the time
clay has applied for discharge
for a facility located at
9P service Station No. 2atsa,
of each and ever such publication, a newspa-
y p /
5601-
6601 WEst Fnendl Avenue,
Gnu ordcoun-
per meeting all of the requirements and quali-
tGvreensboro yNC,
discne°gea1140Gohf'treaten
fications of Section 1-597 of the General
groundwater from one ommil
into an unnamed tributary to
Statutes of North Carolina and was a qualified
Horse Pen Creek, a Class AS
III 8 NSW stmam in Ne Cape
Fear over Basin which has
newspaper within the meaning of Section 1-597
a
7010 flow of 0 Cis and a 3002
how ofOys. Sam. n.,a,om.r.
of the General Statutes of North Carolina.
This 16th day of November, 1998
Sworn to and subscribed before me, this 16t day of
November 1998
My commision expires: August 23, 2003
K. D. McCULLOUGH
NOTARY PUBLIC
GUILFORD COUNTY, NC
Commission Expires 8-23-2003

DENR/DWQ
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
u
Facility Information
Applicant/Facility Name
BP Oil
Permit No.
Permitted ow:
ac> >ty ass:
aci ityemntStatus:
(i.e. New, Modification,
Existing or Renewal)
enewa
ounty:
tiumord
stream Characteristics
ReceivingStream:
Unnamed tributary to Horse Pen Creek
Stream assr icatiorr
- -N c.J
u asm:
Drainage Area (mi ):
see below for explanation)
Summer c s
Winter c s
cs:
verage ow c s
IWCTFOT—
Miscellaneous
Regional ice:
Winston- a em
USOS opo Qua
C/7.5
Changes Incorporated into Permit Renewal
ropose anges
Parameters Affected
liasis for change(s)
none
The treatment facility would consist of a phase/water separator, influent sampling port,
low profile air stripper, transfer pump, flow totalizer, and emergency trips and controls.
Timothy Black (WSRO) recommended the following additions to the treatment system:
1. Strainer or particulate filter prior to air stripper and w
2. Granulated Active Carbon (GAC) filter following air stripper (prior to discharge). o
The Raleigh Central office concurs with these recommendations.
WLA Summary
The drainage area is assumed to be zero because the facility would discharge to a
stormwater collection system. Thus, there will be no dilution for limited parameters. ^'
0
The groundwater has been contaminated with gasoline and diesel fuel. Groundwater
analytical data also indicate the presence of chlorinated solvents and this application will
be processed as an individual permit. To construct/develop the Effluent Limitations and
Monitoring Requirements for this system, the general permit groundwater remediation
effluent sheet for gasoline and diesel contamination will be modified to also include
chlorinated solvents.
Page 1 of 2
version980910

DENR/DWQ
FACT SHEET FOR NPDES PERMIT DEVELOPWNT
Chlorof: 'e-'Cic /6a'--Yit7
Dibromc erion. These
two com S 2 oncentrations
are expel toxicants of
concern. proposed permit.
1,1 Dichl
detection /G
criteria.
federal cr;
federalcr - p RECE!\Irr)
N.c
Influent c C. Dept.
ea i-d OCT - 5 'M
oug
the volati. Wi nstr
toxicants
Regior,,,
There wei
analyzed.
carcinoge
parameter
monitorin j more info 206
Proposed
Draft Pen )» Of
Permit Sc
State Can
;h had one
,their federal
er than the
greater than the
iteria, and
However,
Hcult to predict
onsidered
mit.
tents) that were
s were not
of the
:riteria). Thus,
jackage for
If you have any questions on any of the above information or on the attached
permit, please contact Paul Clark at [phone], extension 580.
Copies of the following are attached to provide further information on the permit
development:
• Draft Permit
NPDES Recommendation by:
Regional Office Comments
Regional Recommendation by: /4�M,,4/-,Date:
Reviewed By:
egwl�I Supervisor: Date: I0-9 9
NPDES Unit: Date: Z
Page 2 of 2
version980910

NCO086380 Summary
September 15, 1998
BP Oil has applied for a permit to discharge 1440 GPD treated wastewater to the City of
Greensboro's stormwater collection system which drains to a stormwater pond that exits
to an unnamed tributary to Horse Pen Creek (Class WS-III/B NSW) in the Cape Fear
River basin (030602).
The treatment facility would consist of a phase/water separator, influent sampling port,
low profile air stripper, transfer pump, flow totalizer, and emergency trips and controllers.
Timothy Black (WSRO) recommended the following additions to the treatment system:
1. Strainer or particulate filter prior to air stripper and
2. Granulated Active Carbon (GAC) filter following air stripper (prior to discharge).
The Raleigh Central office concurs with these recommendations.
WLA Summary
The drainage area is assumed to be zero because the facility would discharge to a
stormwater collection system. Thus, there will be no dilution for limited parameters.
The groundwater has been contaminated with gasoline and diesel fuel. Groundwater
analytical data also indicate the presence of chlorinated solvents and this application will
be processed as an individual permit. To construct/develop the Effluent Limitations and
Monitoring Requirements for this system, the general permit groundwater remediation
effluent sheet for gasoline and diesel contamination will be modified to also include
chlorinated solvents.
Monitoring will be required for the following chlorinated solvents as indicated in the
"Monitor?" column. All concentrations are in ug/l. Total number of detections for
particular chlorinated solvent is indicated in parentheses after the name.
•.• •
1 1
1 1
1.
1
•
■ww�ll�Ld��S[4�f
S2�7Ld�i�ll.��
(a) Detection level is much greater than federal criteria.
Care?: Is the toxicant a carcinogen?
Inflnt Cones: Influent Concentrations
Fed Crit: Federal Criteria
Page] of2
Ver980915

NCO086380 Summary
September 15, 1998
Chloroform had five detections all less than the federal criterion. Dibromochloromethane
had two detections both less than the federal criterion. These two compounds are
byproducts of drinking water chlorination, effluent concentrations are expected to be
much less than federal criteria and are not considered toxicants of concern. Monitoring
for these two toxicants will not be required in the proposed permit.
1,1 Dichloroethene (1,1 DCE) had only one detection, but it was greater than the federal
criterion. 1,1,2-Trichloroethane (1,1,2 TCE) had only one detection, but it was greater
than the federal criterion. Trichloroethene (TCE) had three detections, two that were
greater than the federal criterion. Methylene Chloride had eight detections one, which
was greater than the federal criterion.
Influent concentrations for these compounds were greater than federal criteria, and
expected effluent concentrations were much lower than federal criteria. However,
although the solvents may possess certain volatility individually, it is difficult to predict
the volatility of multi -solvent system. Therefore, these compounds are considered
toxicants of concern and monitoring will be required in the proposed permit.
There were other compounds (including some additional chlorinated solvents) that were
analyzed for as part of the groundwater analysis. These other compounds were not
carcinogens and/or had federal criteria much greater than detected levels of the parameter
in the groundwater (or some compounds did not have federal criteria). Thus, monitoring
was not required for these parameters. Refer to application package for more
information.
Page 2 of 2
Ver980915

• Groundwater Treatment System Design Review 9/15/98
r------------ --------------------------------------------------------------------T
Facility: ;BP Oil
- -----------------------------------------------------------------
---------------------------------
NPDES # NCO086380
---------------
Air Flow Rate
Water Flow Rate
135------CFM
-7,200;GPD
27,252 liters/day
Air/Water
5.0 GPM
Ratio = 202
lions
Oil/Water ; ----------------
Separator
72.0 minute detention time
Constituent
Concentratior
(ppb)
Removal Eff.
(percent)
Residual
(mg/1)
C Adsorbe
(mg/g)
AC Absorbed
(g/day)
Benzene
8,900
99.89
0.00979
16
16.67
Toluene
14,000
99.89
0.0154
22.5
18.65
Ethyl Benzenf
1,700
99.89
0.00187
24
2.12
Xylene
9,200
99.89
0.01012
46
6.00
Lead
11
0.011
MTBE
79,000
98.84
0.9164
7.5
3,329.83
EDB
206
98.84
0.0023896
7.5
8.68
IPE
140
98.84
0.001624
7.5
5.90
chloroform
3.7
98.84
4.292E-05
2.5
0.47
dibromochlord
01
98.84
3.48E-06
2.5
0.04
1,2Dichloroeth
0
98.84
4.64E-06
2.5
0.05
1,2,2Trichloroe 13
98.841
1.508E-05
2.5
0.16
Trichloroethen
56
98.84
0.0006496
2.5
7.08
Methylene chlp 81
98.84
8.7E-051
2.5
0.95
Total usage
3,396.61
t------------
400'(total Ibs of GAC in filter)
53.47 days to breakthrough
Note: Flow Rate of 5 GPM (7200 GPD) is conservative. Acutal flow rate
will likely be closer to 1 GPM.
Note: the GAC Adsorbed values in bold are conservative estimates
removal is probably greater.

cc: Permits and Engineering
Technical Support Branch
County Health Dept.
Central Files
WSRO
JUN JUfii 19&998
., .�1en:Ftad aW ft1M1W11q
SOC PRIORITY PROJECT: Yes _ No_X_
If Yes, SOC No.
To: Permits and Engineering Unit
Water Quality Section
Attention: Paul Clark
Date: June 10, 1998
NPDES STAFF REPORT AND RECOMMENDATION
County : Guilford
Permit No. NCO086380
PART I - GENERAL INFORMATION
1. Facility and Address: BP Station 24154
5601 W. Friendly Ave.
Greensboro, NC
2. Date of Investigation: June 10. 1998
3. Report Prepared by: Timothy E. Black
4. Persons Contacted and Telephone Number: Dan Huff -BP Oil Co.
[phone]
5. Directions to Site: Take I-40E to the Guilford College Rd.
Exit. Turn left. Take Guilford College Rd. to W. Friendly
Ave. Turn Right. BP station is located at 5601 W. Friendly
Avenue.
6. Discharge Points(s), List for all discharge points:
Latitude: 36005'45" Longitude: 79052'59"
U.S.G.S. Quad No.: C19SW U.S.G.S. Quad Name: Guilford, NC
7. Site size and expansion area consistent with application?
Yes
8. Topography (relationship to flood plain included): The
groundwater treatment facility does not appear to be in the
flood plain.
9. Location of nearest dwelling: 100 ft Northeast of the site
location. The facility is surrounded by businesses on all
sides (located in the City of Greensboro).

10. Receiving stream or affected surface waters: UT to Horse Pen
Creek.
a. Classification: WS-III/B NSW
b. River Basin and Subbasin No.: 03-06-02
C. Describe receiving stream features and pertinent
downstream uses: Effluent will empty into the City of
Greensboro's stormdrain system. The stormwater then
drains into a stormwater pond that exits into a UT to
Horse Pen Creek. The water source is used for drinking
water supply and for swimming.
Part II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
1. a. Volume of Wastewater to be permitted: 1,440 GPD
(Ultimate Design Capacity)
b. What is the current permitted capacity of the Waste
Water Treatment facility? N/A
C. Actual treatment capacity of the current facility
(current design capacity)? 5 gpm or 7,200 gpd
d. Date(s) and construction activities allowed by previous
Authorizations to Construct issued in the previous two
years. N/A
e. Please provide a description of existing or
substantially constructed wastewater treatment
facilities; N/A
f. Please provide a description of proposed wastewater
treatment facilities. The proposed facility will
consist of the following: phase/water separator;
influent sampling port; low profile air stripper;
transfer pump; flow totalizer; and emergency trips and
controllers.
g. Possible toxic impacts to surface waters: Remediation
system specifications indicate that 99.9% of all
organics will be removed.
h. Pretreatment Program (POTWs only): N/A
in development approved
should be required not needed
2. Residuals handling and utilization/disposal scheme: N/A
a. If residuals are being land applied, please specify DEM
Permit No.
Residuals Contractor
Telephone No.
NPDES Permit Staff Report
Version 10/92
Page 2

b. Residuals stabilization: PSRP PFRP
Other
C. Landfill:
d. Other disposal/utilization scheme (Specify):
3. Treatment plant classification (attach completed rating
sheet). Class I
4. SIC Code(s): 5541
Primary: N/A Secondary: N/A
Main Treatment Unit Code: 0053(& 55)0000
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: N/A
3. Important SOC, JOC or Compliance Schedule dates: (Please
indicate) N/A
Date
Submission of Plans and Specifications
Begin Construction
Complete Construction
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: There is no available land to use as for
spray field.
Connection to Regional Sewer System: Permit application was
denied by the City of Greensboro (See attached letter).
Subsurface: There is not enough available land to use for a
subsurface system.
Other disposal options: *See Evaluation and
Recommendations.
5. Other Special Items:
NPDES Permit Staff Report
Version 10/92
Page 3

PART IV - EVALUATION AND RECOMMENDATIONS
*The option of reinjecting the effluent back into the groundwater
was unable to be evaluated. I would recommend approving the
permit contingent on groundwater's comments on the practicality
of this option. Additional suggestions include: 1) a strainer --
prior to the introduction of water into the air stripper, and 2)
a 55 gallon Granulated Activated Carbon (GAC) filter following
the air stripper with sampling valve to use as a polisher.
Signature 6f report preparer
Water
Quality Regiona KAupervisor
,�/zAg
Date
NPDES Permit Staff Report
Version 10/92
U-, 1,\prr J..
Page 4

55' 1599
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ft
600 1 7400loao
l r/• i
r
3998
390
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n96
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5'
, 1, �, I rl�

RATING SCALE FOR CLASSIFICATION OF WATER POLLUTION CONTROL SYSTEMS
Name of Facility: EP SerJ; c No, 621/S11
Owner or Contact Person: .917.1 lyf,.0 — &? &Z
Mailing Address: S1,01 V, live.
County: &'yor-d Telephone: 7d '//— "I" /.z ;
Present Classification: New Facility Existing Facility
NPDES Per. No. NC00 Nondisc. Per. No.WO Health Dept.Per No.
Rated by: T� 6—. 161404 Telephone: �36)77/— �/L0p Date: --
Reviewed by: Health Dept. Telephone:
Regional Office Telephone:
Central Office Telephone:
ORC: Grade: Telephone:
Check Classification(s): _ Subsurface Spray Irrigation Land Application
Wastewater Classification: (Circle One) 0 II III IV Total Points:
SLIBSURFACE CLASSIFICATION
(check all units that apply)
1. septic tanks
2. pump tanks
3. siphon or pump -dosing systems
4. sand fillers
5. grease trapinterceptor
6. oil/water separators
7. gravity subsurface treatment and disposal:
8. pressure subsurface treatment and disposal:
-------------------------
SPRAY IRRIGATION CLASSIFICATION
(check all units that apply)
1. preliminary treatment (definition no. 32 )
2. lagoons
3. septic tanks
4. pump tanks
5. pumps
6. sand filters
7-grease trap/nterceptor
8. oil/water separators
9 disinfection
10. chemical addition for nutrient/algae control
11. spray Irrigation of wastewater
In addition to the above classifications, pretreatment of wastewater In excess of these components shall
be rated using the point rating system and will require an operator with an appropriate dual certification.
LAND APPLICATION/RESIDl1ALS CLASSIFICATION (Applies only to permit holder)
1. Land application of biosolids, residuals or contaminated soils on a designated site.
WASTEWATER TREATMENT FACILITY CLASSIFICATION
The following systems shall be assigned a Class I classification, unless the flow is of a significant quantity or the technology is unusually
complex, to require consideration by the Commission on a case -by -case basis: (Check If Appropriate)
1. Oil/water Separator Systems consisting only of physical separation, pumps and disposal;
2. Septic Tank/Sand Fitter Systems consisting only of septic tanks, dosing apparatus, pumps.sand filters, disinfection
and direct discharge;
3. Lagoon Systems consisting only of preliminary treatment, lagoons, pumps, disinfection, necessary chemical treatment for
algae or nutrient control, and direct discharge;
4. Closed -loop Recycle Systems;
5.XGroundwater Remediation Systems consisting only of oil/water separators, pumps, air -stripping, carbon adsorption, disinfection
and dispoezl;
6. Aquacukure operations with discharge to surface waters;
7. Water Plant sludge handling and back -wash water treatment;
8. Seafood processing consisting of screening and disposal.
g. Single-family discharging systems, with the exception of Aerobic Treatment Units, will be classified it permitted after July 1,
1993 or if upon inspection by the Division, it is found that the system is not being adequately operated or maintained. Such
systems will be notified of the classification or reclassification by the Commission, in writing.

The following scale is used for rating wastewater treatment facilities: (circle appropriate points)
ITEM
POINTS
(1)
Industrial Pretreatment Units or Industrial Pretreatment Program (see deflnhlon No. 33)...................................................4
(2)
DESIGN
FLOW OF PLANT IN gpd {rot applicable to non -contaminated cootlng waters, sludge handling facilities for
water purification
plants, totally closed cycle systems(see definition No. 11), and facilities consisting only of hem
(4)(d) or
Items (4)(d) and (I 1)(d)]
0 - 20,000................................................................................................................................................1
20.001 - 50.000......................................................................................................................................2
50.001 - 100.000....................................................................................................................................3
100.001 - 250,000...................................................................................................................................4
250.001 - 500,000..................................................................................................................................5
500,001 - 1.0001000...............................................................................................................................a
1,000,001 - 2.000.000...........................................................................................................................10
2.000.001 (and up) rate 1 point additional for each 200.000 gpd capacity up to a maximum of .................30
Design Flow (gpd)
(3)
PRELIMINARY
UNITSIPROCESSES(see definition No.32)
(a)
BarScreare...............................................................................................................................................1
(b)
or
Mechanical Screens, Static Screens or Comminuting Devices..........................................................................2
(c)
Grit Remoal..............................................................................................................................................1
(d)
or
Mechanical or Aerated Grit Removal.............................................................................................................2
(a)
Flow Measuring Device................................................................................................................................I
(f)
or
Instrumented Flow Measurement................................................................................................................2
(g)
Praaeratlon...............................................................................................................................................2
(h)
influent Flow Equalization..........................................................................................................................2
(1)
Grease or Oil Separators - Gravity.................................................................................................................2
Mechanical................................................................................................................................................3
Dissolved Air Flotation...............................................................................................................................8
{J)
Prechlarination.........................................................................................................................................5
(4)
PRIMARYTREATMENT tNITSIPROCESSES
(a)
Septic Tank (see definition No. 43)............................................................................................................2
(b)
Imhoff Tank..............................................................................................................................................5
(c)
Primary Clarliars.........................................................................................................................................5
(d)
Settling Ponds or Settling Tanks for Inorganic Nontoxic Materials (sludge handling facilities for water
purification plants, send, gravel, stone, and other mining operations except recreational activities such
as gem
orgold mining)........................................................................................................................................2
(5)
SECIXJD4RYTREATMENTLNRS?ROCFSSES
(a)
Carbonaceous Stage
(i) Aeration -High Purity Oxygen System.......................................................... _..................
20
D(hused Air System.......................................................................................................1
0
Mechanical Air System (fixed, floating or rotor)..................................................................8
Separate Sludge Reaeration............................................................................................3
(II) Trickling Flher
HighRate.......................................................................................................................7
StandardRate...............................................................................................................5
Packed Tower................................................................................................................5
(ill) Biological Aerated Filter or Aerated Biological Filter ............................................................1
0
(Iv) Aerated Lagoons..........................................................................................................10
(v) Rotating Biological Conlactors ......................................................................................10
(vi) Sand Titers -Intermittent biological..................................................................................2
Reclrculatingbiological....................................................................................................3
(viI) Stabilization Lagoons....................................................................................................5
(viii) Clatiflar..........................................................................................................................5
(ix) Single stage system for combined carbonaceous removal of PAD and nitrogenous removal by
nitrification (see definition No. 12)(Points for tits hem have to be in addition to hems
(5)(a)(1) through (5)(a)(viii),
utilizing the extended aeration process (see definition No.3a)...........................................2
utilizing other than the extended aeration process ............. ................................
...... ._... 8
(x) Nutrient additions to enhance Boo removal......................................................................5
(XI) Biological Culture ('Super Bugs')addhion........................................................................5
(b)
Nitrogenous Stage
(I) Aeration - High Purity Oxygen System.. .................... ............._............0..........................20
DhfusedAir System................................................................................0......................1
0
Mechanical Air System (fixed, floating or rotor)_..............................................................08
SeparateSludge Reaeration............................................................................0...............3
(II) Trickling Fllter-High Rate...................................................................................................7
StandardFlats. .......................... 0.0 ................... 0 ..............................................................
5
Packed Tower ....... ............ .......... ...:........................ ............................ ...........................
(III) Biological Aerated Fitter or Aerated Biological Fitter .............. ...... ............. .............
0............ 10
(Iv) Rotaling Biological Contactors .............................................................................0........10
(v) Sand Flher- Intermittent biological..............................................................0...............0....2
Recirculatingbiological....................................................................................................2
(VI) Cladrer..........................................................................................................................5
(6)
7ETrIARYORADVANCEDTREATMENTLNnWROCESSFS
(a)
Activated Catbon Beds -
whhout carbon rageneratlon....... .............................. ...........................................................
..5
withcarbon regeneration.......................................................................................................1
5
(b)
Powdered of Granular Act)valed Carbon Fead-
Mthout carbon regeneration...................................................................0....................0.......5
with carbon regeneration...............................................................................0.....................1
5
(a)
Air stripping .............................................................................................................................................5
(d)
Deni ri icatkn Process..............................................................................................................................10
(a)
Eleclrodlalysls............................................................................................................................................5
(f)
Foam Separation...... .................... ........................................................................... ..... 0......0.....................5
(g)
Ion Exchange........................................... . .... ............. 0....... 0.................... .........................0.....0..................5
(h)
Land Application of Treated Effluent (Gee definition No. 22b) (rot applicable for sand, gravel, stone
and other similar mining operations) by high rate Infiltration......_........._ ................... ......... .............. ........... 4
(1)
Microscreens.........................................................................................................................................0...5
(1)
Phosphorous Removal by Biological Processes (See de0nhion No. 26)........................................................20
(it)
Polishing Ponds - without aeration................ ...... ............... ..... ............................... .... 0.......... ....................
withaeration.................................................................................................0...............5

8P OIL
December 29, 1998
Mr. Tom Belnick
North Carolina Department of Environment and Natural Resources
Division of Water Quality
NPDES Unit
512 North Salisbury Street
Raleigh, North Carolina 27604
Re: BP Service Station No. 24154
5601 West Friendly Avenue
Greensboro, North Carolina
NCDENR Groundwater Incident No. 8271
NPDES Permit No. NCO086380
Dear Mr. Belnick:
OP Oil Company
2555 Weetsl0e Parkway, Suite 300
C. S. #1600
Alpharetta, Georgia 30004-9951
[phone]
As discussed during our telephone conversations today, please find the enclosed report from
CRA Services which outlines the Liquid Phase Filter Specifications and Granular Activated
Carbon - Polishing Unit Specifications for the units which were added to the dual phase vapor
extraction system for the referenced site. These additions were made at the direction of Mr. Paul
Clark of the NPDES Unit in a letter dated October 29, 1998.
Please forward this information to the appropriate person such that the final considerations for
the requested NPDES permit can be made. I look forward to speaking with you further on
Monday January 4, 1998.
Thank you for your assistance. Please feel free to call me at [phone] with any questions.
Sincerely,// —
E)�ld--
Daniel N. Huff, P. E.
Contract Engineer
On Behalf of Environmental Remediation Management
cc: Susan L. Sharp - BP Atlanta
Enclosure: Addendum to CAPA prepared by CRA Services, November 24, 1998

CRA Services
CV
November 24, 1998
Daniel N. Huff, PE
BP Oil Company
Lakeview 400
2555 Westside Parkway, Suite 300
Alpharetta, Georgia 30004-9951
RE: Addendum to CAPA
BP Service Station No. 24154
5601 West Friendly Avenue
Greensboro, Guilford County, North Carolina
NCDENR Groundwater Incident No. 8271
CRA File: 24288-03
Dear Dan:
475 Metroplex Drive, Suite 110
Nashville, Tennessee 37211-3137
[phone] Office 16151 315-9934 Fax
(- 1998
As you are aware, CRA Services (CRA — formerly G&E Engineering) prepared a
Corrective Action Plan Addendum (CAPA), dated April 1997, for the referenced BP Oil
Company (BP) facility. The CAPA was approved by the North Carolina Department of
Environment and Natural Resources. CAPA implementation activities are currently
underway.
The original CAPA design included disposing of treated groundwater effluent via the
sanitary sewer system for the City of Greensboro. However, because of a moratorium
established by the City of Greensboro, disposal via the sanitary sewer was not allowed.
Therefore, BP is currently pursuing final approval of a National Pollutant Discharge
Elimination System (NPDES) permit to allow disposal of the treated effluent to the storm
sewer system. The draft NPDES permit specifies using an effluent particulate filter and
effluent carbon -polishing unit prior to discharge to the storm sewer. These elements were
not initially required nor included in the original CAPA design. Accordingly, this addendum
to the CAPA outlines the specifications for an effluent particulate filter and carbon -
polishing unit and incorporates these elements into the existing remediation system.
LIQUID -PHASE PARTICULATE FILTER SPECIFICATIONS
A liquid -phase particulate filter shall be installed on the effluent discharge line
(downstream of the air -stripping unit) as shown on revised Figure 11 from the CAPA
(see attachment). The particulate filter shall be capable of accepting a flow rate of up to
5 gallons per minute (gpm) from the air stripper and shall remove 50 micron particles
from the effluent stream. The particulate filter shall support and utilize disposable
polypropylene bag filters.
Worldwide Engineering, Environmental, and Construction Services

CRA SERVICES
D.N. Huff, PE
November 24, 1998
CRA File: 24288-03
Page 2
The particulate filter shall be a Hayward Single Bag Filter (Model No. H12SBF20VT) or
equivalent unit capable of achieving the same performance criteria. Pressure gauges
capable of reading pressure in pounds per square inch (psi) shall be placed on the
effluent discharge line (immediately before and after the particulate filter — see Figure
11). The pressure gauges shall have a maximum range of 1 to 50 psi. Vendor -supplied
documentation for the liquid -phase particulate filter are presented in Appendix A.
LIQUID -PHASE CARBON - POLISHING UNIT SPECIFICATIONS
A liquid -phase carbon -polishing unit shall be installed on the effluent discharge line
(downstream of the particulate filter) as shown on revised Figure 11 from the CAPA.
The carbon -polishing unit shall be capable of accepting a flow rate of up to 5 gpm from
the air stripper and shall be able to remove a minimum of 87 percent of the residual
organic hydrocarbon compounds in the air -stripper effluent stream. The inlet and outlet
of the unit shall be configured with quick disconnect fittings and flexible hoses to allow
connection to the outlet of the particulate filter and to the effluent discharge line stub -
out.
The carbon -polishing unit shall be a CETCO-Aquatec Model MX200-L 55-gallon drum
unit or equivalent unit capable of achieving the same performance criteria. A pressure
gauge capable of reading pressure in psi shall be placed on the effluent discharge line
of the unit (see Figure 11). The pressure gauge shall have a maximum range of 1 to 50
psi. Effluent sampling ports shall be installed on the effluent discharge line (immediately
before and after the carbon unit — see Figure 11). In addition, a vacuum relief valve shall
be installed immediately downstream of the carbon -polishing unit and shall be capable
of preventing vapor lock within the carbon -polishing unit (see Figure 11). Vendor -
supplied documentation for the liquid -phase carbon -polishing unit are presented in
Appendix A.
The estimated maximum concentrations of benzene, toluene, ethylbenzene, and total
xylenes in the air -stripper effluent were used to (1) evaluate the ability of the carbon -
polishing unit to remove the dissolved hydrocarbons and (2) estimate carbon usage.
The removal efficiency of the carbon unit was estimated to be approximately 95 percent.
The estimated effective life of the specified carbon -polishing unit (i.e., carbon usage) is
over one year. The computations and performance summary for the carbon -polishing
unit are presented in Appendix B.
EXISTING EFFLUENT TRANSFER PUMP
Head loss calculations were performed for the specified liquid -phase particulate filter and
the liquid -phase carbon -polishing unit (see Appendix C). Based upon the head loss
calculations, the air -stripper effluent pump must be able to operate against a total dynamic
head of approximately 7 feet at 5 gpm. The current effluent transfer pump has a capacity

CRA SERVICES
D.N. Huff, PE
November 24, 1998
CRA File: 24288-03
Page 3
of approximately 9 gpm at 10 feet of total pumping head. Based upon the total dynamic
head loss calculations for the effluent discharge line (e.g., static head, friction loss from
carbon -polishing unit, etc.), the current effluent transfer pump is sufficient (see Appendix
C). Frequent replacement of the bag filters for the particulate filter (i.e., monthly) may be
required to minimize excessive head loss. If excessive plugging of the carbon unit occurs
(i.e., approximately 4 psi), the current effluent transfer pump will not be sufficient.
As always, CRA appreciates the opportunity to provide continued professional services to
BP. If you have any questions or comments, please contact us. ..�9104,
CA
Sincerely, .•'�jE SS po+��9•':
CRA Services/CRA Engineering, Inc.
SEALr
a/KQ� S l l lCU9lvt �✓ ��P/1/� � •.� 20144
�s,� i�i�tiF�CI trEE�
Brian D. Webster, CHMM Jerry W. Eplin, PE •.,� �Y W'EpL���a
Project Manager North Carolina Licensed'""Amata%%%%''
PE No. 20144
BDW:pdm
Attachments: Revised Figure 11 - DPVES Process Schematic
Appendix A - Liquid -Phase Carbon Drum and Liquid -Phase Particulate
Filter Documentation
Appendix B - Liquid -Phase Carbon Use Calculations
Appendix C - Head Loss Calculations

DJPEEWW-1
W
D1PE�W-2
W
DPEW-3
DPEW-4
PUMP AIR -
REGULATOR
(TYP)
DPVES -
EXTRACTION
WELL (TYP)
PUMP SUPPORT
CABLE (TYP)
INTAKE FILTER
(TYP)
TO ECP
MANUAL
AMBIENT
AIR INTAKE
TO
ROTARY —LOBE
I 70 ECPZ' DRY —VACUUM
HLT-26 a PUMP SKID
PUMP
CONDENSATE TRAP
VAPOR DISCHARGE
STACK
VAPOR
SAMPLE
PORT
TO ECP
T
NC 'I,PS-1
AMBIENT
AIR INTAKE
CONDENSATE FROM CONDENSATE TRAP
U.3 lil'M Ncy U�
NC I TS-1
0.3 GPM INFLUENT
NC SAMPLING
0.25 GPM PORT
ACP �ZACP Nc
r
LE
ECP 1-0
WELLECPAMP
COALESCING I
PHASE/WATER I
NC SEPARATOR DPS t
I
DRAIN TO
TRANSFER
ACCUMULATED
LNAPL
SUBMERSIBLE--' II
L-J
I�
L-J
PNEUMATIC EXTRACTION WELL
PUMP (TYP) DPEW-1
EXTRACTION WELL
OPEW-2
EXTRACTION WELL
DPEW-3
EXTRACTION WELL
DPEW-4
PUMP P-1
PUMP P-2
PUMP P-3
PUMP P-4
111/17/981 2 1 ADD BAG FILTER AND CARBON TREATMENT IMK� 1
DESIGNED BY:
DRAWN BY: M. LIFE
CHECKED BY:
APPROVED BY. _161IL—
AIR DISCHF
STACK
ECP
HILT-1
HL-1
PUMP P-5--,_ LL-1
LOW -PROFILE AIR STRIPPER INC
PARTICULATE
FILTER
PORT
I
ECP
T
LEGEND
0 BALL VALVE
FLOW TOTALIZER
FRESH AIR CONTROL VALVE
Q VACUUM GAUGE
© PRESSURE SWITCH
QT TEMPERATURE GAUGE
NC NORMALLY CLOSED
HLT HIGH-LEVEL TRIP
ECP ELECTRICAL CONTROL PANEL
P-1 PUMP NUMBER 1
DPS DIFFERENTIAL PRESSURE SWITCH
THROTTLE VALVE
CHECK VALVE
LL LOW-LEVEL CONTROLLER
HL HIGH-LEVEL CONTROLLER
TS TEMPERATURE THERMOSTAT
LNAPL LIGHT NON -AQUEOUS PHASE LIQUID
ACP AIR FLOW CONTROL PANEL
© PRESSURE GAUGE
VACUUM
G NC REUEF
VALVE
CARBON
POUSHING
UNIT DISCHARGE TO
STORM SEWER
ELECTRICAL AIR FLOW
CONTROL --- POWER TO PUMPS. AIR CONTROL
PANEL -- COMPRESSOR, AIR FLOW AIR
CONTROL PANEL AND PANEL COMPRESSOR---2ECP
(ECP) -- AIR —STRIPPER BLOWER (ACP)'""" CRA SERVICES
I COMPRESSED AIR CRA ENGINEERING, INC
AJ SOLENOID VALVE (TYP)
CONTROLLERS TO P-1 TO P-2 TO P-3 TO P-4
(DPEW-1) (DPEW-2) (DPEW-3) (OPEW-4) 1 11=30 P
SCALE
BP OIL COMPANY BP SERVICE STATION NO. 24154 DPVES T DRAWNG NB2S
5601 WEST FRIENDLY AVENUE PROCESS REV.
ATLANTA, GEORGIA GREENSBORO, GUILFORD COUNTY, NORTH CAROLINA SCHEMATIC 1 1
Client Project Location FIG./SHEET No.

APPENDIX A
LIQUID -PHASE CARBON DRUM AND LIQUID -PHASE
PARTICULATE FILTER DOCUMENTATION

�4
�. 11i11 �Jr11�J �
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r
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D7—J1

11:12aii Front—
T-439 P.02/05 F-835
i
=-Are
A'
3 ,
sr�
s
S
Ward. Separators and Filters from ITS..
Yo rf-S. ion. to Filtration Problems.
� �-� Slaaard .�1 szt3rsUa are ids :� c:::�7•-'mg }�uiicl� ihzt n�d€tg xt!eo� of pt� 0oid
i
iL,UWAW BAG FILTERS an used to remove
5- to 100•mi-mr particles from liquids. Both
single -and douhk- ago Mtersare available_
Bag Fliers can handle Flow rates up to 101)
Bptn- The polypropviene bag is supported
inside the GRer %Ymel kv a staining basket
,fie the fluid ns forced through the filter the
bag taps all particles larger than its micron
rali 4 when the ten becomes clogged, it is
easily remov: d ar-d replaced with ackan one.
2- I Single
= I Uoubk
l2 SBFz��•• gar
S 5S9.S1
RATWM L'ENTRIFUM SEPAWOM
cotrtinuoteily remove solid particles from
jfquid "'reams. There are no moving aarLS
screens, eadridges, or media to reolaca The
separator utilizes centrdttg_t force to create
a wrtea that separates the solidi from tht
lice d- Separated solids CoUed III the bottGm
page chamber:I tte_n the purge clamber is
full, the solidi can be removed tvittxut truing
to shirt doom the litre: The solids are oftza
purged into a bait filter to recover proem fluid
prior to disposal. Separators Work hest hn
remmdng particles tbatwill readily settle out
of the process rhtid_
5 Micron $ LST
70 Micron
Micron I
%Mieron
iK! Micron 7JS
Ton"o-imb
S 4.]dron 4.26
T Micron -_ 438
50 Micron _ �} 1.R8
Plr Micron 4.7i.
7
`%
1
vSOLD ONLY IN
C SB OF 24
_ y
2S

Now To Select A Sal Filter
Siep' allCheck the chart on the right to make sure that the temperature/
pressure of the application falls within the OK range.
%5t00,TWO 'Determine the flow rate, in GPM, of the system into which the
wag filter is to be installed. Hayward single and double length bag filters work with
flows of up to 100 GPM. If the systems flow rate is greater consider using two or
more filters manifolded together. For example, if the system flow rate is 150 GPM
using two manifolded filters would reduce the flow to a manageable 75 GPM
through each.
StBp %*66 Select the bag. Hayward bags are available in 5, 10, 25, 50 and
M
100 micron raiings. The bags are made from nonwoven polypropylene felt material.
They are double stitched and heat treated to minimize fiber migration. All bags are individually plastic wrapped and
sealed to prevent contamination in shipping and handling. A single length bag has a surface area of 2.0 square feet and
a double length 4.1 square feet.
Fs.�: ,
St@p dy Consider start up pressure loss. Bag filters are typically sized so that there is a 2 psi or less pressure
loss across 4i`em with a clean bag installed. Keep in mind that this is just a guide. Remember that in most applications
filtration efficiency falls off at about 8 to 10 psi loss and bag change out should take place before a 20 psi loss is
reached. When in doubt select the filter with the lowest pressure loss. The time between bag change outs for a double
length filter is more than twice that of a single length filter in the same application.
Chart Number One -Vessel Pressure Loss
�111 Ill��illl�li
Ads AMR
� i
it
�III�II I�1111111
. r
Table Number One -Vessel Viscosity Correction
Viscosity In CPS 200 400 600 800 1000 2000
Correction Factor 1.10 1.20 1.40 1.50 1.60 1.80
Chart Number Two -Bag Pressure Loss
B
dd¢
G
e
g
o to 20 0 W N 100 120 W
FLOW RATE OF WATER —GPM
Table Two -Bag Viscosity Correction
Viscosity Factor I Viscosity I Factor Viscosity I Factor
Water 1
1.0
200
16.6
800
50.0
so
4.5
400
27.7
1000
56.2
r tct 'i
g`tejR1 i l 4icalculate start up pressure loss. To figure
the f;l pressure loss across the filter with a clean bag
requires making two pressure loss calculations and adding
them together, the loss across the filter vessel without a bag
and the bag loss.
First Use the system flow rate and Chart Number One to
determine the loss across the filter without a bag (single and
double length filter vessels have virtually the same pressure
loss without a bag). Example: A flow rate of 30 GPM results in
a .4 psi pressure loss. If the process media is water or has a
viscosity less than 200 cps, that's it. If the viscosity is greater,
select the correction factor that matches the process media
viscosity in cps units from Table Number One. Multiply the
pressure drop by this correction factor.
Second: Single and double length filter bags have different
pressure losses. Use Chart Number Two to determine the
pressure loss per square foot of bag surface. Example: With a
system flow rate of 30 GPM, a 5 or 10 micron bag would have a
.2 psi loss per square foot This loss is divided by 2.0 for a
single length bag or 4.1 for a double length. These factors are
the respective surface areas, of the bag, in square feet. The
loss for a single bag would be .1 psi (.2 + 2.0) and .05 for a
double (.2 + 4.1). For fluids with viscosities other than water
select the correction factor from Table Two and multiply the
pressure drop by it. Example: if the fluid viscosity were 800 cps
the pressure loss for a single length bag would be 5.0 psi (.1 x
50.0).
Last: Add the pressure loss of the vessel and the bag together
to get the pressure loss across the filter with the bag installed.
Pressure differential dala determined by ISA S75.02 lest procedure and
is shown as a guide only and may 1ary by application.
100 8.5 600 38.9 1 2000 113.6
HA ARR) 900 Fairmount
908 351-54 Elizabeth, Fax: [phone]

.. Single and Double
Hayward glass reinforced polypropy-
lene bag filters feature a unique, one
piece, seamless body rated at 225 psi.
A metal filter housing will ultimately
rust orcorrode and contaminate the
process media. There is no danger of
this happening with Hayward's low
cost, high quality all plastic bag filter.
It will never rust or corrode and
compromise the quality of the filtration
system.
The filter was designed for easy
service. A hand removable cover and
built-in basket and bag handles makes
bag change out fast and easy. No
tools are needed and the filter is back
in service in a matter of minutes. The
external cover threads are not in
contact with the process media
eliminating the need for cleaning each
time the bag Is changed. For extra
strength the cover features specially
designed buttress style threads.
Installation is quick using the rugged,
bottom mounting flange. The innova-
tive, integrally molded support bracket
mount provides for an installation that
is secure and rigid.
The filter comes complete with an all
plastic, polypropylene vent valve
installed on the cover. The valve has a
1/40 tap for the installation of a gauge.
Non woven, polypropylene felt bags
are available in 5, 10, 25, 50 and 100
micron ratings. Using a different type
bag is not a problem. The retaining
basket has a universal seat that works
with almost any 7" diameter bag.
Engineering
Specifications
All bag filters shall be made of glass
reinforced PPL and be rated at 225
psi. The vessel body to be one piece,
non fabricated, wittf external cover
threads. Filter mounting flange is to
be an integrally molded part of the
filter body. Piping connections and
drain to be 2' NPT. Cover to be
removable without the use of tools.
As manufactured by Hayward Indus -
Bag Miters
Parts List
1 Vent valve with optional gauge
2 Cover
3 Body
4 Basket
5 Viton "O" ring
6 Bag retainer
7 Viton "Cr ring
Dimensions (Inches)
A B C D E F G H Wt. (Ib.)
Single -Length 6.50 10.00 3.25 34.10 20.00 18.30 6.13 20.60 60.00
Double -Length 6.50 10.00 3.25 50.10 36.00 18.30 6.13 36.60 80.00
Drain 4 ndhndctlon:
Piping conneetiodw
Material of Construction:
Mounting flange:
Pressure rating:
►2•x 16' 2.0 6q. ft.
7' x 324 4.1 sq. ft.
Single length, 28:1
Double length, 60:1
2" NPT
2' NPT
Glass -reinforced polypropylene
Integrally molded
225 psi, non shock at 70F
trial Products, Inc. M�® 900 Fairmount Fax: 90
nt Avenue, Elizabeth, Jersey
07207

trtt�tr�r�
CETCO-Aquatec Engineering Division warehouses a wide variety of granular and powdered lignite peat and bituminous coal activated
carbons —many of which are designed for specific liquid purification objectives. Not only can CETCO Sales Representatives help in selecting
the activated carbon that best accomplishes a purification objective, they can also recommend the most cost effective standard or custom
carbon adsorber or adsorption system.
The carbon adsorbers and adsorption systems described and pictured in this product information sheet have been engineered to prevent
preferential flow (channeling) and allow foreasy delivery and carbon changeout. Safety considerations, cost, flow rate, organic and inorganic
contaminants and their concentrations, allowable pressure drop and project length all need to be taken into consideration when selecting the
most appropriate adsorption vessel or system. CETCO has a broad line of liquid phase activated carbon adsorbers and adsorption systems
capable of treating flow rates ranging from I gpm to greater than 1400 gpm - all of which can be quickly delivered, installed and serviced by
trained CETCO technicians and engineers.
All of CETCO's liquid adsorbers are backwashable. Standard carbon adsorbers and adsorption systems are also available with reacti-
vated carbon for a lower price and are available for lease/rent as well as for purchase. Dimensional drawings are available upon request for
any standard product. Private labeling is available.
-� MX200-L
55 gallon (6.5 cu. ft.) 16 gauge carbon steel 5B DOT multi -trip canister with an internal epoxy phenolic
lining, and an external epoxy corrosion resistant coating (blue) with lock ring open top lid. Each holds 180
His of liquid phase bituminous granular activated carbon. Upper and lower hub and lateral systems evenly
distribute/collect liquid streams to prevent channeling and allow for maximum utilization of the carbon
bed. Either the top center or side bottom 1-1/4" FPT connection can be used as the inlet or outlet- allowing
for either up or down now operation, and for backwashing. A maximum of 10 gpm flow rate and l0-11si
rating is recommended. Each drum adsorber containing dry bituminous carbon has a shipping weight of
23516s.
PX200-L
55 gallon (6.5 cu. ft.) polyethylene corrosion and chemical resistant
lock ring open top canister. Each holds 1801bs of liquid phase bitumi-
nous granular activated carbon. Upper and lower hub and lateral sys-
tems evenly distribute%ollect liquid streams to prevent channeling and
allow for maximum utilization of the carbon bed. Either 1-1/4" Flir
connection can be used as the inlet or outlet - allowing for either up or
down flow operation, and for back washing. A maximum of 10 gpm
flow rate is recommended. Each drum adsorber containing dry bitumi-
nous carbon has a shipping weight of 220 lbs. Recommended for non -
pressure applications only.
FIBERGLASS
Spiral wound fiberglass chemical and corrosion resistant vessels range in size from 10 gpm (200 His of
carbon) adsorbers to 60 gpm (2000 His of carbon) adsorbers. As with any adsorber, larger flow rates can be
accommodated by piping two or more adsorbers in parallel -their individual flow rates being additive.
Upper and lower distribution systems distribute/collect liquid streams to prevent channeling and allow for
maximum utilization of the carbon bed. Either 1" or 2" top connection can be used as the inlet or outlet -
allowing for either up or down flow operation, and for backwashing. All adsorbers are rated at 100 psi.
Model #
ft.3
Carbon
Lbs of
Carbon
Maximum
Flow Rate
O.D.
Overall
Height
Inlet/
Outlet
Bed
Height
FX200-L
7
200
10 gpm
21"
3'
1"
2.7'
FX500-L
18
500
15 gpm
2'
6'
l"
5.7'
FX750-L
27
750
35 gpm
3'
6'
1"
3.8'
35
1000
35 gpm
3'
6'
1"
5.1'
L
54
1500
50 gpm
42"
6'
2"
5.6'
72
2000
60 gpm
4'
6'
2"
5.7'

24 %" O.D. x 34 4' high
5E3 DOT multi —trip canister
with a lock ring open top lid
1 %" FPT F—
Connection
I n
,S-
0
M
5
FLOW RATE (gpm)
10
The 'MX200—L' Series drums are 16 gauge carbon steel
with an internal epoxy lining and external urethane corrosion
resistant coating. Upper and lower hub and lateral distribute
collection system prevents media migration and channeling, for
maximum carbon utilization. Either connection can be used
as the inlet/outlet, allowing for up flow or down flow operation.
Rated for 10 gpm flow at 10 psi is recommended.
APPROX. LOADED WEIGHT = 235 lbs.
.1 %" FPT <--
Connection
O FNCINEEflING d SUPPLY"���'" MX-200—L SERIES 55 Gal. DRUM
nuapalva properly and may N07
AC&UATEC copied and •ies bully partl
shown y LINK) PHASE ADSORBER
wn to third wilhmd
prior terrnol written canaenl by
= " SEEM ` AOUATEC CNGINCENINC a SUPPLY
N:\199i\085\A—M%200L

APPENDIX B
LIQUID -PHASE CARBON USE CALCULATIONS

CARBON LIQUID PHASE TOTAL BTEX (AS MTBE)
FLOW RATE(gpm) ¢ HYDROCARBONS (ppm) 0 09624 EFFLUENT LIMIT(ppm) 0,01219
(air stripper effluent) (summation of NPDES
benzene limit of 0.00119
ppm and NPDES toluene
limit of 0.011 ppm)
Lbs. per day of hydrocarbons in the wastestream
flow rate 5 X concentration 0.09624 X 0-M Ibs/day = 0,0057744 lbs./day of hydrocarbon
9pr11-ppm
Calculate GAC using isotherm data
Assume MTBE is most restrictive GAC loading for BTEX, therefore MTBE isotherm for GAC loading is used
0.005774 Ibs.fda_y of hydrocarbon = 0,28872 Ibs./day GAC used
2,Q% GAC Loading (from isotherm)
Factor Interference from background organics
Typically, background organics are only 1-2 ppm.
Determine Capacity Reduction from chart below
0.28872 Ibs./day GAC used X 1.30 = 0,37531 Total Ibs/day GAC used
(30% reduction)
Determine Minimum Vessel Diameter
Hydraulic loading 4 gpm/sq.ft.
flow rate = LU sq.ft.
4 gpm/sq.ft.
Determine Minimum Contact Time
Determine % removal, then find Contact Time from chart below
1-(Target concentraliontinfluent concentration) X 100 = 87.33 % removal (minimum required % removal)
Determine Minimum Bed Volume
flow rate X 10 min. contact time X cu.ft. = 6.684491979 cu.ft.
(95%removal) 7.48 gal
It is proposed to use one carbon bed.
6,684492 cu.ft. = 6.684492 cu.ft. each
1 beds
Check carbon vessel for minimum bed volume, and considering flow rate, select minimum vessel size. Actual carbon vessel contains 6.5 cu. ft.
of carbon and is capable of accepting 10 gpm.
Estimate Bed Life
194 Ibs. carbon per vessel = 479.6 days of bed life =
0.37531 Ibs./day of GAC used 365 days/yr
EFFECTS OF BACKGROUND ORGANICS ON ADSORPTION
Hydrocarbon Level (ppm)
Capacity Reduction
151
1.5
°h
20
0.15
30%
0.015
50%
1,Q years
1:111113•]i
GULilEltlal:l i•)ilK•L`I/dJ�lh51_�
Notes: 1) These calculations are based upon conservative influent hydrocarbon concentrations and a floe rate of 5 gPm. The actual Influent hydrocarbon concentrations
will likely be less than the assumed value and the actual flow rate is anticipated to be approximately 1 gpm. Therefore. the hydrocarbon removal precent and carbon
use calwtabons are very conservative.
242BB-03(001) CRA SERVICES

qe j 'pumor Vfml l �MUBOJO *w4* jol
9 to pedq uop mSPV SSON PORML SHOOS
(AU,4 7 r," nw-v-)
H3111/SWVH9OU3IW 'NOIIVUIN33N0O. ivnaiS30
I . nnnt • 00I 0t
ro
I
(M
H3H13 1A1(1H-1H31-1AH13W

'i6/12/1998 15:54 6105242797 . ACCOUNTING PAGE 82
�, G oundweter
Reeov®ry Systems, Ina
GRS LOW PROFILE DIFFUSION AIR STRInVZa
CALCULATIONS
Client: B P OIL COMPANY
Site: # 24154 Greensboro, NC
Flow Rate: 5 GPM
Water Temperature: 40 F
Air Flow Rate: 140.S.CFM
4' x 3' x 3 Tier Unit
Influent Effluent
Contaminant Conc . PPS Conc • JPB Efficiency
BTEX .(Xylene).: 87,500 96.24 99.89
T PH (Napthalene) 127,946 1,478 93.84
Removal efficiencies are based on theoretical calculations using
air to water ratios., volume and water depth for the flow rate
specified. This derivation follows. the models presented in the
transfer of, volatile substances from water to the atmosphere.
The model is based on modified version written by Mattle=-
Muller, Cujer, and Giger, published in Water Research Vol. 15,
1981.*
These values are based on the best theoretical estimates
available: Ac;ual operational numbers w411 vary with site
conditions.
* Equations attached
JW95 -06
299E National Rd_, Exton, PA 19341 • 610-524-2790 9 FAX [phone]

•,,06/12/1998 15:04 6105242797 ACCOUNTING PAGE 03
X = (RLaV) / (Hcg2z1)
R� - Mass Transfer Coefficient (L/t)
It = specific Surface Area
V = Volume in Tank (L1)
Metho`�
Diffused Aerator Design =
Aerator Design Equation
The design is based on an equation modified from Matter -Muller,
C. Guier, W., and Giger, W., 1981, "Transfer of Volatile
Substances From Water to Atmosphere", Water Research, Vol. 15,
PP. 1271-1279.
Cl/Cl = I1 + (Qq He/Q1n) L (I-exP (-M ZS) ] 31
where:
C1 = Contaminant Influent Concentration (M/0
C2 = Contaminant Effluent Concentration (M/L1)
Qq = Volumetric Air FloW Rate (L1/t)
41 Volumetric Liquid Flow Rate (L1/t)
n =_ Number of Tanks in Series (-y
m = "Saturation Factor"
Kea V
1ieQ9 ZS
X4 = Mass Transfer Coefficient (L/t)
He = Dimensionless Henry's Constant (-)
a Specific Surface Area(1/L)
ZS = Diffuser Submergence (L)
V = Liquid Volume in Tank (0
The value of n can also be varied to model axial dispersion
(continuous series of tank model).'

,06/12/199B 15:04 6105242797 ACCOUNTING PAGE 04
Assumptions:
No mixing occurs between tank sections.
Interfacial geometry changes little between pilot
conditions and design conditions. study
The effect of concentration on the mass transfer
coefficient is the same for experimentally derived
coefficients and predicted coefficients.
since:
a = Surface Area of the Interface
Tank.Volume
and since a, the specific interfacial surface area is directly
Proportional to the gas flow -rate and the sparger depth.
Therefore:
(Rr,a)21)i(Zsi�� iVi)
Where:
4q Gas Flow Rate
Zs Sparger Depth
V = Tank Volume

06/12/1998 15:04
6105242797
ACCOUNTING
PAGE 05
DESIGN SIZE:
Date: 6/12/98'
GROUNDWATER RECOVERY SYSTEMS
AIR DIFFUSER CALCULATIONS
41x31X3TIER
SITE: BP # 24154 Greensboro, NC..
a
V
= 0.929 1/m
- 0.08496
specific surface area
m3
chamber volume
z•
0-2794
diffuser submergence
g
B
= 35280 m/m2
- 0.2788
acceleration due to gravity
IS
m2
= 1.078 X 10-4
cross sectional area of liquid flow
safety factor
n
01
= 9
5 GPM
number of chambers
Qg
= i5 SCFM
liquid flow rate
air flow rate through 1 chamber
Xvlene
( Total STEX
as Xylene)
p
= 861.000 g/m
g/m min
D
1.4 x 3
HC
K1
P
= 0.0051 (----- )-1/3
Q1 N
(-----)2/3 (----)-1/2
Ng
B'S N p D
Kl
0.253
Kl a V
Sc Qg Z.
Z o 0.683
cl Qg He
c2 Q1 _
cl = Sr.soo ppb (Influent)
n = 9 c2 = 96.24 ppb (Effluent)
JW95-07
Eq i-
Eq 2.
Eq 3.

-"06/12/1996 15:04
6105242797
ACCOUNTING
PAGE 06
DESIGN SIZE
Date: 6/12/98
GROUNDWATER RECOVERY SYSTEMS
AIR DIFFUSER CALCULATIONS
4'x3'X3TIER
a
- 0.929 1/m
V
= 0.08496 m3
Z.
= 0.2794
g
= 35280 m/m2
B
0..2788 m2
S
0.990 x 10-3
n
= 9
Q1
_ 5 GPM
Qg
= 15 SCFM
SITE: BP # 24154 Greensboro, NC
specific surface area
Chamber volume
diffuser submergence
acceleration due to gravity
cross sectional area Of liquid flow
safety factor
number of.chambers
liquid flow rate
air flow rate through 1 chamber-
TPH as Napthelene
p
1_145.000 g/W
N 0 - 297 g/m min
D
3_ 44 x n-•
HC
K1
P
= 0.0051 (-----)-1/3
Q1
(-----)2/3
N
(----)-1/2
N3
BSN
pD Eql.
Kl
= 0.063
Kl a V
I=
--------
Jc Qg Z•
Eq 2.
I
cl
Qg He
C2
Ql
Eq 3.
Cl
= 127.946 Ispb (Influent)
n
= 9 c2 =
1.478 ppb
(Effluent)
JW95-07

APPENDIX C
HEAD LOSS CALCULATIONS

1
HEAD LOSS CALCULATIONS FOR
LIQUID -PHASE PARTICULATE FILTER
Particulate (Bag) Filter = Hayward Single Bag Filter Model No. H12SBF20VT
Design Flow Rate = 5 gpm
System Pressure Loss Across Bag Filter Vessel (without bag) = 0.1 psi
(obtained from Hayward literature; 0.1 psi loss is based upon a conservative 10
gpm flow rate)
System pressure loss across bag (50 micron) = 0.1 psi
(obtained from Hayward literature; 0.1 psi loss is based upon a conservative 10
gpm flow rate)
Total pressure loss across bag filter vessel with a single 50 micron bag filter = 0.1 psi +
0.1 psi = 0.2 psi
Pressure loss in psi through the particulate filter was converted to head in feet of water
as follows:
Head in feet of water = (lbs/in2)(conversion factor of 2.3066)
0.2 Ib/in2 x 2.3066 = 0.5 feet of water
Therefore: Total head loss through liquid -phase particulate filter is 0.5 feet.
24288-03(001)
Page 1 of 1
CRA SERVICES

HEAD LOSS CALCULATIONS FOR LIQUID -PHASE CARBON
Carbon Vessel = MX - 200 - L 55-gallon drum by CETCO-Aquatec (CETCO)
Design Flow Rate = 5 gpm
System Pressure Loss Through Carbon Drums = 0.3 psi
(obtained from CETCO literature)
Pressure loss in psi through the carbon drum was converted to head in feet of water as
follows:
Head in feet of water = (lbs/in 2) (conversion factor of 2.3066)
0.3 Ib/in2 x 2.3066 = 0.7 ft. of water
Therefore: Total head loss through liquid -phase carbon drum is 0.7 feet.
24288-03(001)
Page 1 of 1
CRA SERVICES

REVISED TOTAL DYNAMIC HEAD CALCULATIONS
AIR STRIPPER EFFLUENT PUMP P-5
STATIC HEAD
• Estimated maximum total static head: 5 feet
FRICTION LOSS
• Maximum 175 feet pipe length
• 4-inch diameter PVC pipe
• Flow rate: Up to 5 gallons per minute (gpm - system is designed for a total
average flow rate of 5 gpm)
• One check valve
• One globe valve
• Up to five 900 elbows
• One flow indicating recorder
FROM GOULD'S AND GORMAN-RUPP TECHNICAL DATA SHEETS:
• 4-inch pipe at 5 gpm: Head loss = <0.09 foot/100 feet = 0.0009 foot/foot
• Check valve = Head loss of 26 equivalent pipe feet/each
• Globe valve (full open): Head loss of 110.0 equivalent pipe feet/each
• 900 elbow: Head loss of 10.0 equivalent pipe feet/each
• Flow indicating recorder= head loss of 110.0 equivalent pipe feet/each
• Equivalent Pipe Length:
(175 feet) + (26 feet) + (110.0 feet) + (5)(10.0 feet) + (110.0 feet) � 471 feet
• Pipe Friction Loss:
(471 feet)(0.0009 foot/foot) = 0.42 foot � 0.5 foot
24288-03(001) Page 1 of 2 CRA SERVICES

TOTAL HEAD LOSS (P-5)
APstatic + APfriction = AP total
5 feet + 0.5 feet (pipe friction) + 0.7 feet (liquid -phase carbon) + 0.5 feet (particulate
filter) = 6.7 feet
PUMP PERFORMANCE
PUMP: Pump must operate against an approximate 7-foot head at 5 gpm. The
current GRS — provided pump is capable of operating against an approximate 10-foot
head at 9 gpm; therefore, the current pump is sufficient (assuming frequent bag filter
replacement and no plugging of carbon -polishing unit to cause additional excessive
head loss).
24288-03(001) Page 2 of 2 CRA SERVICES

EP 10 SJ 09:04AM CRA SERVICES-MVL
P.1
CRA Servic6s
475 METROPLEX ORIVR SUITE 110 - NASHVILLE. TN 37211 • (615) 315-827 • FAX [phone]
FACSIMILE TRANSMITTAL COVER SHEET j l�
To: Paul Clark From: Brian D. Webs er
NCDENR-NPDES Group CRA Services
cc: Dan Huff
BP -Atlanta
Fax: [phone] Fax: [phone]
Phone: Phone: [phone]
Number of Pages 6 (including this cover sheet)
Original/Hard Copy ❑ will be mailed ® will not be mailed.
DATE: September 10, 1998
MESSAGE: RE: BP Service Station No. 24154, Greensboro, NO
Pursuant to our discussion this date, attached are the air stripper efficiency calculations
as prepared by the equipment manufacturer (Groundwater Recovery Systems, Inc),
This is the same information that was previously forwarded to Eric Black with NCDENR-
Winston-Salem for his review and evaluation of the NPDES permit application.
Please contact me if you have any questions or if you require any additional information,
7/��qp
I ,f f /
;14
//
�
j

08/1aSP �1.0 '98 29:04AM CRP SERVICES-NVL ACCOUNTING
R: aGE 02
`! Gnn ndw®tor
Re_ Vory Systems, inc.
9
Clients B P OIL COMPANY
g ,te, Y 24154 Greensboro, N
Flow _Rate.: 5 GPM
water Temperature: 40
Air Flow Rate; 140 5CFM
41 x 31- x 3 Tier Unit
=n£luent
LDMZ m;.nan ion B
HUX ,(Xylene).: 87,500
. F.
Effluent
24I>c• PP9
96.24
bl,--O Copt ,
% Efficiency
99.99
TPHA (Napthalene) 127,946 ® 1,478 99.84 ] /
Glen/� k) - n a�j W,4e /XA0 a loam /s&„ Yes .ld v eo..aY/Jv..%�J dal-)
K ��T Khxalc.{ j7�' G'710�/Nw�'
Removal efficiencies are based on theoretical calculations using
air to water ratios, volume and water depth for the flow rate
speci,ied. Th-s derivation 1!011ows,the models presented in the
transfer et,voiatile substances 'from water to the atmosphere,
The model is based on mcdi!ied version written by Mattler-
Mu11er, Cujer, and Giger, published in 'Rater Research Vol. IS, -
These values are based on the best theoretical estimates
available; Actual operational numbers will vary with site D
conditions
,� e .0ox. v 041"2/1ll e +-4
" Equations attached
JW95-06
3996 National Rd., Exton, PA 19341 • 510-524.2790 ► FAX 6IM24.2795
N= %�l�Q Pe�mlevn� Ny�0"C12S

gg�5EP ]„0 '98, 09�e4AM CRR,SERVICES-NVL
ACCOUNTING
P.3GE 93
X = (R�av)/(H�QIZI)
Mass Transfer Co" Eicient (L/t)
a - .Specific Surface Area
V Volum® in Tank (L1)
et o of
Diffused Aerator Design -
Aerator Design Equation
The design is based oa,an equation modified ,from'Matter-Muller,
C. Gujer, W., and diger, W „ 1981, "Transfer of Volatile
substances From Water to Atmosphere", Water Research, Vol. 19,
PP- 1271-1279,
c1/c) + (Qg H4/Qln)
where:
C1 = Contaminant Influent Concentration (M/103)
C� = Contaminant Effluent Concentration (M/L))
Qq = Volumetric Air Flow Rate (L)/t)
01 Volumetric Liquid Floor Rats (L)/t)
n Number of Tanks in series (-)
C ° "Saturation Factor" a
Heoyzs
RL Mass Transfer Coefficient (L/t)
He nimensionless Henry's Constant (-)
a specific Surface Area(1/L)
zs = Diffuser submergence (L)
v Liquid Volume in Tank 0)
The value of n can also be varied to model axial dispersion
(continuous series of tank model),'

66/1 SFN(i�ao 10 Ise 09:05%11 �RA SEEVICES-NVL ACCOUNTING Pi4dGE 04
iu:uY 1 JLYLf
Assumptions;
No mixing occurs between tank sections.
Interfacial geometry changes little between pilot study
conditions and design conditions.
The effect of concentration on the mass transfer
coefficient is the same for experimentally derived
coeffIcienta and predicted coetficienis.
since:
a ■ Surma are area of the rtiterface
Tank Volume
and since a, the Specific interfacial surface area is directly
proportional to the -gag flow -rate and the sparger depth.
Therefore;
cFt�a)= cx�er, A2LLsI) NO
c�I) czgl) cvl)
Where.
Qq Gas Flow Rate
Z5 — Sparger Depth
V Tank Volume

•'86/liE���'98,a�9�05eh1n�2�1��l�RVICES-NVL
ACCOUNTING
PAGE B5
GROUMWATER RECOVERY SYSTEMS
AIR DIFFUSER CALCULATIONS
DESIGN SIZE. 4' x
31 X 3 TIER
Race.
6172/98'
SITE! BP 6 24154
Greensboro, NG..
a
V
= 0.929 1/m
a 0.08496
specific Surface area
m3
chamber volume
z.
0.2794
diffuser submergence
= 35280 m/m2
acceleration due to gravity
B
S
0.2768 m2
+ 1.078 x 10'*
cross sectional area of liquid flow
safety factor
n
Q1
9
5 GPM
nuw4er of chambers
liq."d flow rate
Qg
15 SCFM
air flow rate through 1 chamber
Xv7_eno
( Total 9TEX
as Xylene)
p
= 861.,000 g/m'
N b 0,054 ` g/m min
D
HC A•29
K1
P
n 0.0091 (- ).1/3
41 N
'(_-_--)2/3 (-__. -1/2
Ng
8'S N p D
Eq i.
MI.
-AJA3_
K1 a V
sc Qg z�
Eq a .
I
0.693
cl
Qg He
.c2
1 + -----
( 1 - e-s %&) )„
Q1
_
Eq 3.
cl
= 87'sn ppb (Influent)
n
. 9.
c2 = 96.24 ppb (Effluent)
JW93-07

• P.E1GE 06
96/:5EP 10 '98.„ 09 05RM_CfjR,SERVICES-NVL ACCOUNTING
GROUNDWATER RECOVERY SYSTEMS
AIR DIFFUSER CALCULATIONS
DE5SGN SIZE: 4' x 3' * 3 TIER
Date: 6/12/98 SITE: BP 5 24154 Greensboro, NC
a - 0.929 l/m specific surface area
V = 0.08495 ml chamber volume
Z. 0.2794• diffuser submergence
g 35220 m/m2 acceleration due to gravity
s 0..2768 m2 cross sectional area of liquid flow
S = 0.950 x 3.0-4 safety Lactor
n . 9 number of chambers
Q1 = 5 GPM liquid flow rate
Qg = 19 SCFM air flaw rate through 1 chamber.
TPN as Napthal®ne
p 1�145.000 g/ttP N = . g/tn min
Ho - D.O49 _
K1 0.0051 (--p--)-1/3 (Q----)2/3
Ng ESN pD.
Kl M 0.063
KiaV
JC Qg z,
c1 45 He
-Ca- e-c %■) ).
QS
C3. = J46 ppb (Influent)
n 9 C2 4 _t_47e ppb (Effluent)
JWSS-07
Eq 1.
Eq 2.
Eq 3.

CRA Services
475 Metroplex Drive, Suite 110
Nashville, Tennessee 37211-3137
[phone] Office [phone] Fax
August 24, 1998
Mr. Paul Clark
North Carolina Department of Environment
ci
I_,
and Natural Resources
c
_u
512 North Salisbury Street
^ -',
Raleigh, North Carolina 27064
F
C 0
n,r
�m
VIA FAX [phone] AND CERTIFIED US MAIL
moo
rn
Re: NPDES Permit Application
o
y�
Revised Laboratory Analytical Results for
Report of Findings for Groundwater Sampling Event
BP Service Station No. 24154
5601 West Friendly Avenue
Greensboro, Guilford County, North Carolina
CRA File: 24288-05
Dear Mr. Clark:
At the request of the National Pollutant Discharge Elimination System (NPDES) Group of
the North Carolina Department of Environment and Natural Resources (NCDENR), CRA
Services/CRA Engineering, Inc. (CRA) recently completed a groundwater sampling event
at the referenced BP Oil Company (BP) facility. As requested by the NCDENR-NPDES
Group, this sampling event was conducted to obtain current groundwater analytical data
prior to final approval of a pending NPDES permit. The NPDES permit is required as part
of the proposed remedial action approach at the site. A letter report outlining the findings
of this sampling event was submitted to the NCDENR-NPDES Group on July 31, 1998.
On August 10, 1998, the NCDENR-NPDES Group expressed concern over the elevated
reporting limits (i.e., detection limits) achieved for several of the volatile parameters by the
analytical laboratory (Severn Trent Laboratories [STL]). Accordingly, CRA contacted STL
to determine if lower reporting limits could be achieved and reported. STL subsequently
reviewed the raw data and determined that lower reporting limits could be achieved for
several parameters. A narrative was prepared by STL to summarize the analytical report
revisions and is presented in Attachment A. This revised analytical data is summarized on
Table 2 (attached); the revised laboratory analytical report from STL is presented as
Attachment A.
Worldwide Engineering, Environmental, and Construction Services

CRA Services
Mr. P. Clark
August 24, 1998
CRA File: 24288-05
Page 2
We trust that this additional information will be sufficient to finalize the NPDES permit for
this site. As you are aware, a deadline for the installation and implementation of the
proposed remedial system has been established by the Guilford County Department of
Public Health and NCDENR-Winston-Salem. Accordingly, time is of the essence;
implementation of the proposed corrective actions can not proceed until final approval of
the NPDES permit is received. Thank you in advance for your time and attention to this
matter. If you have any questions, please contact CRA at [phone] or Mr. Dan N.
Huff, BP -Atlanta at [phone].
Sincerely,
CRA Services/CRA Engineering, Inc.
c�VV
Brian D. Webster, CHMM
Project Manager
Jerry W. Eplin, PE
North Carolina Licensed Eng
BDW:taw
CAg011401
SS�n.Ryq
SEAL
20144
Attachments: Table 2 - REVISED Summary of Laboratory Analytical Results for
Groundwater Samples
Attachment A - REVISED Laboratory Analytical Results
cc: Mr. Dan N. Huff, BP -Atlanta w/ attachments
Ms. Sherri Knight, NCDENR-Winston-Salem w/o attachments
Mr. Gene Mao, Guilford County Department of Public Health w/o attachments

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N
Q
Q
QQ
W
w
Z
Q
O
O
O
O
O
O
O
V
Z
Z
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❑
w
O
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a
N
Om`1
O
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h
N
m
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G
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O
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O
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i9
Q
Z
Q
Z
QQ
Y
QQ
Z
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Z
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Y
QQ
Z
N
a
O
0
O
a w
U U> CO
m
O
N
J
Z
O
m
O
O
J Q W 3
O
a
az
Q
w
w
z
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w
W
w
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g
LLI
K
W
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=
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UWUZO
60
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0
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O
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V
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3
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NN
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Z
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a
0
in
N
N
N
N
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N
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N
0
Z
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N
V
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J
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00
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2
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mm
z
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0
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N
CAN
tnT
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b
W
+
N
+
O
p
N
+
W
IJ
m
+
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Id
3.
O
0
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0
0
0
0
0
0
o
p
A
y
m
Z
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o
m
DZ
OI
O
Z
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Z
Z
Z
Z
�
b
m
N
Z
Z
Z
Z
Z
Z
2
Z
Z
Z
Z
4
w
N
O
O
0
(T
lli
m
O
W
N
O
O
N
A
N
N
m
W
T
N
D
3
9
m
°_
O
z
0
o
z
z
D
z
D
Z
D
p
n
o
n
0
n
0
n
0
n
0
n
0
n
o
Q
m
m
W
N
O
N
W
N
O
m
O
m
O
Y
Z
Z
Z
Z
Z
Z
Z
2
Z
Z
Z
m

PARAMETER
APPLICABLE
NC ACTION
LEVEL
(P91L)
MW-12
MP-1
P9/L
P9/L
SAMPLE DATE
SAMPLE DATE
02123/93'
01/231962
08/04/96
01117/97
07115/98
02123/93'
01123/962
08/04/96
01/17/97
07/16198
BENZENE
1
NI
NI
NI
1,000
2,300
NI
NI
NI
8,900
NS
TOLUENE
1,000
NI
NI
NI
85
190
NI
NI
NI
13,000
NS
ETHYLBENZENE
29
NI
NI
NI
63
160
NI
NI
NI
1,700
NS
TOTALXYLENES
530
NI
NI
NI
190
510
NI
NI
NI
9,200
NS
TOTAL BTEX
N/A
NI
NI
NI
1,338
3,160
NI
NI
NI
32,800
NS
MTBE
200
NI
NI
NI
33
61
NI
NI
NI
45,000
NS
EDB
0.0004
NI
NI
NI
<0.01
<0.02
NI
NI
NI
2.67
NS
IPE
70
NI
NI
NI
<10
<50
NI
NI
NI
<500
NS
TOTALLEAD
15
NI
NI
NI
11
NA
NI
NI
NI
<4
NS
CHLOROFORM
0.19
NI
NI
NI
0.40
<20
NI
NI
NI
<0.05
NS
METHYLENE CHLORIDE
5
NI
NI
NI
<0.08
<50
NI
NI
NI
<0.08
NS
1,1,1-TRICHLOROETHANE
200
NI
NI
NI
<0.03
<10
NI
NI
NI
<0.03
NS
CIS-1,3-DICHLOROPROPENE
0.2
NI
NI
NI
1.0
<10
NI
NI
NI
1.3
NS
DIBROMOCHLOROMETHANE
NL
NI
NI
NI
<0.09
<50
NI
NI
NI
<0.09
NS
1,4-DICHLOROBENZENE
75
NI
NI
NI
<0.24
<20
NI
NI
NI
<0.24
NS:j
1,1-DICHLOROETHANE
700
NI
NI
NI
<0.07
<10
NI
NI
NI
<0.07
NS
T2
24288-05(001) PAGE 9 OF 11 CRA SERVICES

0
PARAMETER
APPLICABLE
NC ACTION
LEVEL
(19/L)
MW-12(CONTINUED)
MP-1 (CONTINUED)
N9/L
N91L
SAMPLE DATE
SAMPLE DATE
02123193'
01123/962
08104/96
01117197
07/16198
02123/93'
01/23/962
0810IV96
01/17/97
07115/98
BROMODICHLOROMETHANE
0.6
NI
NI
NI
<0.10
<10
NI
NI
NI
<0.10
NS
CHLOROBENZENE
50
NI
NI
NI
<0.25
<10
NI
NI
NI
<0.25
NS
1,1-DICHLOROETHENE
7
NI
NI
NI
<0.13
<10
NI
NI
NI
<0.13
NS
1,1,2-TRICHLOROETHANE
NL
NI
NI
NI
<0.02
<20
NI
NI
NI
<0.02
NS
TRANS-I,2-DICHLOROETHENE
70
NI
NI
NI
<0.10
<10
NI
NI
NI
<0.10
NS
TRICHLOROETHENE
2.8
NI
NI
NI
0.30
<10
NI
NI
NI
<0.12
NS
1,2-DICHLOROETHANE
0.38
NI
NI
NI
0.40
<10
NI
NI
NI
15
NS
BIS (2-ETHYLHEXYL)
PHTHALATE
3
NI
NI
Ni
<5
<10
NI
NI
NI
<5
NS
NAPHTHALENE
21
NI
NI
NI
<5
<10
NI
NI
NI
390
NS
BUTYLBENZYLPHTHALATE
100
NI
NI
NI
<5
<10
NI
NI
NI
<5
NS
DI-N-OCTYL PHTHALATE
140
NI
NI
NI
<5
<10
NI
NI
NI
<5
NS
BROMOMETHANE
NL
NI
NI
NI
3.1
<20
NI
NI
NI
<0.10
NS
DI-N-BUTYLPHTHALATE
700
NI
NI
NI
<5
<10
NI
NI
NI
8
NS
T2
24288-05(001) PAGE 10 OF 11 CRA SERVICES

NOTES:
1)
2)
3)
4)
5)
6)
7)
8)
9)
10)
11)
-= -' 'NATURAL ATTENUATION PARAMETERS
WELL
.' NUMBER
SAMPLE
DATE'-
TOTAL ,
TOTAL
'.SULFATE
NITRATE
'''SULFIDE.
;
'METHANE
-'
ALKALINITY ,
CHLORIDE
.; (mg1L) .;
,'(mg/L) .
_ (mglL)
MW-2
08/04/96
20
12
<1
0.33
<0.01
<5
MW-3
08/04/96
10
12
<1
0.03
<0.01
440
MW-7
08/04/96
15
9
<1
0.94
<0.01
<5
Data obtained from Comprehensive Site Assessment, S&ME, Inc., S&ME Project No. 1584-93-008, circa April 1993.
Data obtained from Comprehensive Site Assessment, Piedmont Geologic, P.C., March 11, 1996.
The less than sign (<) indicates that the parameter was not detected. The number following the "<" sign is the detection limit for the analysis of the sample.
BDL- Below detection limit
Total BTEX is expressed as the summation of benzene, toluene, ethylbenzene, and total xylenes without regard for significant figures.
pg/L - Micrograms per liter.
mg/L - Milligrams per liter.
NI -Well not installed.
NA- Not analyzed for parameter.
N/A - Not applicable.
NL- No groundwater action level listed. However, in accordance with North Carolina Administrative Code, Title 15A, Subchapter 2L, Section .0200, parameters for which no action level is
specified cannot be present at any detectable concentration.
LNAPL - Light non -aqueous phase liquids present on the groundwater surface; therefore, well was not sampled.
Only the constituent parameters detected by the various analytical methods are presented herein.
NS - Well not sampled.
F - Values reported by the analytical laboratory which were between the method detection limit and the reporting limit.
T2
24288-05(001) PAGE 11 OF 11 CRA SERVICES

ATTACHMENT A
REVISED LABORATORY ANALYTICAL RESULTS

Committed To Your Success
August 19, 1998
Mr. Brian Webster
CRA Services
475 Metroplex Drive, Suite 110
Nashville, TN 37211
RE: BP Site #24154
Dear Mr. Webster:
RECEIVED AUG 2 0 1998
Severn Trent Laboratories
11 East Olive Road
Pensacola FL 32514
Tel: [phone]
Fax: [phone]
We are reissuing the final report for the above reference site with changes to the volatile
data. As discussed, we have reviewed our raw data and have included all reportable levels
of compounds which were found. Due to the dilution factors, only a few changes were
made. In some cases we have had to flag the data in order to report the values which
were between the method detection limit and the reporting limit,
If you have any further questions, please do not hesitate to contact me at 850/474-1001.
Sincerely,
Melissa L. Patrick
Senior Project Manager
cc: 807334
a part of
Other Laboratory Locations:
Severn Tian Senim Inc
• 149 RangewaY Rood. North 9ill.tr MA 01862
• 120 SouOr W O ,L Suite 30q Mon Ilo NC 27560
• 162W Park Raw, Sulk 110, Hw nU]20M
• 315 Wllenrtan Avenue. NmWV NY 12550
• 200 Monme Tumpike, Monme CT 06468
• Y:eifi9d OmN.e PaM, 535wTmnpbn Ima3, VAS80G M401085
8USR 10, MN NI07%1

Committed To Your Success
Reviewed by:
Client:
RECEIVED AUG 1 7 1998
SIGNATURE PAGE
BP OIL COMPANY
ALPHARETTA, GEORGIA
Severn Trent Laboratories
11 East Olive Road
Pensacola FL 32514
Tel: [phone]
Fax: [phone]
Project Name: BP SITE #24154
Project Number: 24288-05
Project Location: 5601 W. FRIENDLY AVE., GREENSBORO, NC
Accession Number: 807334
Project Manager: BRIAN WEBSTER (CPA, TN), DAN HUFF (BP)
Sampled By: THOMAS FISHER
THIS IS A REVISED REPORT: August 14, 1998
Other Laboratory Locations:
• 149 Oangeway RmE. NwN Billetl a MA 01962
• 16203 Park Rae, Suite 110. Nouetm U 77084
• 200 Manme Turnpike, Manme CT 06468
• 120 Soutlueuter Court, Suite 300, MorrisMlle NC 22560
• 315 Fulle btri Avenue. N.Wri NY 125M
•v45f9E FamheP S8 sidue'plmR .Yetioii"010B5
0 628 Riede 10. Wdg W 07981
a part of
Severn Trent Seniccs htc

•S=RN TRENT LABORATORIES 11 East Olive Road Pensacola, Florida 32514 [phone]
Analysis Report
Analysis: VOLATILES (601-602)
Accession:
807334
Client:
BP OIL COMPANY
Project Number:
24288-05
Project Name:
BP SITE #24154
Project Location:
5601 W. FRIENDLY AVE., GREENSBORO, NC
Department:
GC/VOA

.SEVERN TRENT LABORATORIES
11 East Olive Road Pensacola, Florida 32514 [phone]
Accession:
Client:
Project Number:
Project Name:
Project Location:
Test:
Analysis Method:
Extraction Method:
Matrix:
QC Level:
[0) Page 1
Date 14-Aug-98
"FINAL REPORT FORMAT - SINGLE"
807334 in+
BP OIL COMPANY
24288-05
BP SITE #24154
5601 W. FRIENDLY AVE., GREENSBORO, NC
VOLATILES (601-602)
601/602 Mod/Federal Register, 40 CFR, Part 136, Appendix A.
WATER
N
Lab Id: 001
Client Sample Id: 4288-W-001
Batch: LUW110
Blank: B Dry Weight
Parameter:
BENZENE
BROMODICHLOROMETHANE
BROMOFORM
CARBON TETRACHLORIDE
CHLOROBENZENE
CHLOROETHANE
2-CHLOROETHYLVINYLETHER
CHLOROFORM
CHLOROMETHANE
DIBROMOCHLOROMETHANE
1,2-DICHLOROBENZENE
1,3-DICHLOROBENZENE
1,4-DICHLOROBENZENE
DICHLORODIFLUOROMETHANE
1,1-DICHLOROETHANE
1,2-DICHLOROETHANE
1,1-DICHLOROETHENE
TRANS 1,2 DICHLOROETHENE
1,2-DICHLOROPROPANE
CIS-1,3-DICHLOROPROPENE
TRANS-I,3-DICHLOROPROPENE
ETHYLBENZENE
METHYLENE CHLORIDE
METHYL T-BUTYL ETHER
ISOPROPYL ETHER
1,1,2,2-TETRACHLOROETHANE
TETRACHLOROETHENE
TOLUENE
1,1,1-TRICHLOROETHENE
1,1,2-TRICHLOROETHANE
TRICHLOROETHENE
TRICHLOROFLUOROMETHANE
VINYL CHLORIDE
XYLENES (TOTAL)
BROMOFLUOROBENZENE (PID)
BROMOFLUOROBENZENE (ELCD)
ANALYST
Comments:
N/A
Units:
UG/L
%REC/SURR
-REC/SURR
INITIALS
Sample Date/Time: 15-JUL-98 1535
Received Date: 16-JUL-98
Extraction Date: N/A
Analysis Date: 23-JUL-98
Results: Rpt Lmts: Q.
2300
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
160
ND
61
ND
ND
ND
190
ND
ND
ND
ND
ND
510
101
110
CN
100
10
20
20
10
10
50
50
20
50
50
20
20
20
50
10
10
10
10
10
10
10
10
50
50
50
10
30
50
10
20
10
20
10
20
75-118
76-125

.SEVERN TRENT LABORATORIES 11 East Olive Road Pensacola, Florida 32514 [phone]
Accession:
Client:
Project Number:
Project Name:
Project Location:
Test:
Analysis Method:
Extraction Method:
Matrix:
QC Level:
[0) Page 2
Date 14-Aug-98
"FINAL REPORT FORMAT - SINGLE"
334
BPOILCOMPANY
24288-05-
BP SITE #24154
5601 W. FRIENDLY AVE., GREENSBORO, NC
VOLATILES (601-602)
601/602 Mod/Federal Register, 40 CFR, Part 136, Appendix A.
WATER
N
Lab Id: 002
Client Sample Id: 4288-W-002
Batch: LUW110
Blank: A Dry Weight
Parameter:
BENZENE
BROMODICHLOROMETHANE
BROMOFORM
CARBON TETRACHLORIDE
CHLOROBENZENE
2-CHLOROETHYLVINYLETHER
CHLOROFORM
CHLOROMETHANE
DIBROMOCHLOROMETHANE
1,2-DICHLOROBENZENE
1,3-DICHLOROBENZENE
1,4-DICHLOROBENZENE
DICHLORODIFLUOROMETHANE
1,1-DICHLOROETHANE
1,2-DICHLOROETHANE
1,1-DICHLOROETHENE
TRANS 1,2 DICHLOROETHENE
1,2-DICHLOROPROPANE
CIS-1,3-DICHLOROPROPENE
TRANS-I,3-DICHLOROPROPEN
METHYLENE CHLORIDE
METHYL T-BUTYL ETHER
ISOPROPYL ETHER
1,1,2,2-TETRACHLOROETHANE
TETRACHLOROETHENE
TOLUENE
1,1,1-TRICHLOROETHANE
1,1,2-TRICHLOROETHANE
TRICHLOROETHENE
TRICHLOROFLUOROMETHANE
VINYL CHLORIDE
XYLENES (TOTAL)
BROMOFLUOROBENZENE (PID)
BROMOFLUOROBENZENE (ELCD)
ANALYST
Comments:
N/A
Units:
oREC/SURR
INITIALS
Sample Date/Time: 15-JUL-98 1600
Received Date: 16-JUL-98
Extraction Date: N/A
Analysis Date: 23-JUL-98
Results: Rpt Lmts: Q:
3800
100
ND
100
ND
200
ND
200
ND
100
ND
100
ND
500
ND
500
ND
200
ND
500
ND
500
ND
200
ND
200
ND
200
ND
500
ND
100
ND
100
ND
100
ND
100
ND
100
ND
100
ND
100
1100
100
ND
500
79000
5000
ND
500
ND
100
ND
300
2300
500
ND
100
ND
200
ND
100
ND
200
ND
100
5000
200
99
75-118
113
76-125
CN

•SEVERN TRENT LABORATORIES 11 East Olive Road Pensacola, Florida 32514 [phone]
[0) Page 3
Date 14-Aug-98
"FINAL REPORT FORMAT - SINGLE"
Accession: 807334
;7
Client: BP OIL COMPANY')/
Project
Number: 24288-05
Project
Name: BP SITE #24154
-- --- -------
Project
Location: 5601 W. FRIENDLY
AVE., GREENSBORO, NC
Test:
VOLATILES (601-602)
Analysis Method: 601/602 Mod/Federal Register,
40 CFR, Part 136, Appendix A.
Extraction Method: N/A
Matrix: WATER
QC Level: N
Lab Id: 003
Sample Date/Time:
15-JUL-98 1545
Client Sample Id: 4288-W-003
Received
Date:
16-JUL-98
Batch: LUW110
Extraction Date:
N/A
Blank: A Dry Weight r:
N/A
Analysis
Date:
23-JUL-98
Parameter:
Units:
Results:
Rpt Lmts: Q:
BENZENE
UG/L
4400
100
BROMODICHLOROMETHANE
UG/L
ND
100
BROMOFORM
UG/L
ND
200
BROMOMETHANE
UG/L
ND
200
CARBON TETRACHLORIDE
UG/L
ND
100
CHLOROBENZENE
UG/L
ND
100
CHLOROETHANE
UG/L
ND
Soo
2-CHLOROETHYLVINYLETHER
UG/L
ND
Soo
CHLOROFORM
UG/L
ND
200
CHLOROMETHANE
UG/L
ND
500
DIBROMOCHLOROMETHANE
UG/L
ND
So0
1,2-DICHLOROBENZENE
UG/L
ND
200
1,3-DICHLOROBENZENE
UG/L
ND
200
1,4-DICHLOROSENZENE
UG/L
ND
200
DICHLORODIFLUOROMETHANE
UG/L
ND
Soo
1,1-DICHLOROETHANE
UG/L
ND
100
1,2-DICHLOROETHANE
UG/L
110
100
1,1-DICHLOROETHENE
UG/L
ND
100
TRANS 1,2 DICHLOROETHENE
UG/L
ND
100
1,2-DICHLOROPROPANE
UG/L
ND
100
CIS-1,3-DICHLOROPROPENE
UG/L
ND
100
TRANS-I,3-DICHLOROPROPENE
UG/L
ND
100
ETHYLBENZENE
UG/L
970
100
METHYLENE CHLORIDE
UG/L
ND
500
METHYL T-BUTYL ETHER
UG/L
ND
500
ISOPROPYL ETHER
UG/L
ND
500
1,1,2,2-TETRACHLOROETHANE
UG/L
ND
100
TETRACHLOROETHENE
UG/L
ND
300
TOLUENE
UG/L
14000
500
1,1,1-TRICHLOROETHANE
UG/L
ND
100
1,1,2-TRICHLOROETHANE
UG/L
ND
200
TRICHLOROETHENE
UG/L
38
100
F
TRICHLOROFLUOROMETHANE
UG/L
ND
200
VINYL CHLORIDE
UG/L
ND
100
XYLENES (TOTAL)
UG/L
6900
200
BROMOFLUOROBENZENE (PID)
oREC/SURR
100
75-118
BROMOFLUOROBENZENE (ELCD)
oREC/SURR
112
76-125
ANALYST
INITIALS
CN
Comments:

,SEVERN TRENT LABORATORIES 11 East Olive Road Pensacola, Florida 32514 [phone]
Accession:
Client:
Protect Number:
Project Name:
Project Location:
Test:
Analysis Method:
Extraction Method:
Matrix:
QC Level:
[0) Page 4
Date 14-Aug-98
"FINAL REPORT FORMAT - SINGLE"
807334
BP OIL COMPANY
24288-05 N _
BP SITE #24154
5601 W. FRIENDLY AVE., GREENSBORO, NC
VOLATILES (601-602)
601/602 Mod/Federal Register, 40 CFR, Part 136, Appendix A.
WATER
N
Lab Id: 004
Client Sample Id: 4288-W-004
Sample Date/Time: 15-JUL-98 1610
Received Date: 16-JUL-98
Batch: LUW110
Extraction
Date: N/A
Blank: A Dry Weight %.
N/A
Analysis Date: 23-JUL-98
Parameter:
Units:
Results:
Rpt Lmts: Q:
BENZENE
UG/L
ND
1
BROMODICHLOROMETHANE
UG/L
ND
1
BROMOFORM
UG/L
ND
2
BROMOMETHANE
UG/L
ND
2
CARBON TETRACHLORIDE
UG/L
ND
1
CHLOROBENZENE
UG/L
ND
1
CHLOROETHANE
UG/L
ND
5
2-CHLOROETHYLVINYLETHER
UG/L
ND
5
CHLOROFORM
UG/L
ND
2
CHLOROMETHANE
UG/L
ND
5
DIBROMOCHLOROMETHANE
UG/L
ND
5
1,2-DICHLOROBENZENE
UG/L
ND
2
1,3-DICHLOROBENZENE
UG/L
ND
2
1,4-DICHLOROBENZENE
UG/L
ND
2
DICHLORODIFLUOROMETHANE
UG/L
ND
5
1,1-DICHLOROETHANE
UG/L
ND
1
1,2-DICHLOROETHANE
UG/L
ND
1
1,1-DICHLOROETHENE
UG/L
ND
1
TRANS 1,2 DICHLOROETHENE
UG/L
ND
1
1,2-DICHLOROPROPANE
UG/L
ND
1
CIS-1,3-DICHLOROPROPENE
UG/L
ND
1
TRANS-I,3-DICHLOROPROPENE
UG/L
ND
I
ETHYLBENZENE
UG/L
ND
1
METHYLENE CHLORIDE
UG/L
ND
5
METHYL T-BUTYL ETHER
UG/L
ND
5
ISOPROPYL ETHER
UG/L
ND
5
1,1,2,2-TETRACHLOROETHANE
UG/L
ND
1
TETRACHLOROETHENE
UG/L
ND
3
TOLUENE
UG/L
ND
5
1,1,1-TRICHLOROETHANE
UG/L
ND
1
1,1,2-TRICHLOROETHANE
UG/L
ND
2
TRICHLOROETHENE
UG/L
ND
1
TRICHLOROFLUOROMETHANE
UG/L
ND
2
VINYL CHLORIDE
UG/L
NO
1
XYLENES (TOTAL)
UG/L
ND
2
BROMOFLUOROBENZENE (PID)
oREC/SURR
102
75-118
BROMOFLUOROBENZENE (ELCD)
oREC/SURR
109
76-125
ANALYST
INITIALS
CN
Comments:

SEVERN TRENT LABORATORIES 11 East Olive Road Pensacola, Florida 32514
[phone]
Accession:
Client:
Project Number:
Project Name:
Project Location:
Test:
Analysis Method:
Extraction Method:
Matrix:
QC Level:
"FINAL REPORT FORMAT - SINGLE"
807334
BP OIL COMPANY
24288-05
BP SITE #24154
5601 W. FRIENDLY AVE., GREENSBORO, NC
VOLATILES (601-602)
601/602 Mod/Federal Register,
N/A
WATER
N
Lab Id: 005
Client Sample Id: 4288-W-005
Batch: LUW110
Blank: B
Parameter:
BENZENE
Dry Weights. N/A
BROMOFORM
BROMOMETHANE
CARBON TETRACHLORIDE
CHLOROETHANE
2-CHLOROETHYLVINYLETHER
CHLOROFORM
CHLOROMETHANE
1,2-DICHLOROBENZENE
1,3-DICHLOROBENZENE
1,4-DICHLOROBENZENE
DICHLORODIFLUOROMETHANE
1,1-DICHLOROETHANE
1,2-DICHLOROETHANE
1,1-DICHLOROETHENE
TRANS 1,2 DICHLOROETHENE
1,2-DICHLOROPROPANE
CIS-1,3-DICHLOROPROPENE
TRANS-I,3-DICHLOROPROPENE
ETHYLBENZENE
METHYLENE CHLORIDE
METHYL T-BUTYL ETHER
ISOPROPYL ETHER
1,1,2,2-TETRACHLOROETHANE
TETRACHLOROETHENE
TOLUENE
1,1,1-TRICHLOROETHANE
1,1,2-TRICHLOROETHANE
TRICHLOROETHENE
TRICHLOROFLUOROMETHANE
VINYL CHLORIDE
XYLENES (TOTAL)
BROMOFLUOROBENZENE (PID)
BROMOFLUOROBENZENE (ELCD)
ANALYST
Comments:
Units
UG/L
UG/L
UG/L
UG/L
UG/L
UG/L
UG/L
UG/L
UG/L
UG/L
UG/L
UG/L
UG/L
UG/L
UG/L
oREC/SURR
oREC/SURR
INITIALS
[0) Page 5
Date 14-Aug-98
`ak ) ..
40 CFR, Part 136, Appendix A.' -
Sample Date/Time: 15-JUL-98 1620
Received Date: 16-JUL-98
Extraction Date: N/A
Analysis Date: 23-JUL-98
Results: Rpt Lmts: Q:
42
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
12
ND
26
ND
ND
ND
ND
ND
ND
ND
ND
ND
81
100
107
CN
1
1
2
2
1
1
5
5
2
5
5
2
2
2
5
1
1
1
1
1
1
1
1
5
5
5
1
3
5
1
2
1
2
1
2
75-118
76-125

SEVERN TRENT LABORATORIES 11 East Olive Road Pensacola, Florida 32514 [phone]
(0) Page 6
Date 14-Aug-98
"FINAL REPORT FORMAT - SINGLE"
Accession: 807334
Client: BP OIL COMPANY
��',�•�
Project Number: 24288-OS
Project Name: BP SITE #24154
Project Location: 5601 W. FRIENDLY
AVE., GREENSBORO, NC
Test: VOLATILES (601-602)
Analysis Method: 601/602 Mod/Federal Register,
40 CFR, Part 136, Appendix A.
Extraction Method: N/A
Matrix: WATER
QC Level: N
Lab Id: 006
Sample Date/Time: 15-JUL-98 1635
Client Sample Id: 4288-W-006
Received
Date: 16-JUL-98
Batch: LUW110
Extraction Date: N/A
Blank: A Dry Weight o.
N/A
Analysis
Date: 23-JUL-98
Parameter:
Units:
Results:
Rpt Lmts: Q:
BENZENE
UG/L
38
1
BROMODICHLOROMETHANE
UG/L
ND
1
BROMOFORM
UG/L
ND
2
BROMOMETHANE
UG/L
ND
2
CARBON TETRACHLORIDE
UG/L
ND
1
CHLOROBENZENE
UG/L
ND
1
CHLOROETHANE
UG/L
ND
5
2-CHLOROETHYLVINYLETHER
UG/L
ND
5
CHLOROFORM
UG/L
ND
2
CHLOROMETHANE
UG/L
ND
5
DIBROMOCHLOROMETHANE
UG/L
ND
5
1,2-DICHLOROBENZENE
UG/L
ND
2
1,3-DICHLOROBENZENE
UG/L
ND
2
1,4-DICHLOROBENZENE
UG/L
ND
2
DICHLORODIFLUOROMETHANE
UG/L
ND
5
1,1-DICHLOROETHANE
UG/L
ND
1
1,2-DICHLOROETHANE
UG/L
ND
1
1,1-DICHLOROETHENE
UG/L
ND
1
TRANS 1,2 DICHLOROETHENE
UG/L
ND
1
1,2-DICHLOROPROPANE
UG/L
ND
1
CIS-1,3-DICHLOROPROPENE
UG/L
ND
1
TRANS-I,3-DICHLOROPROPENE
UG/L
ND
1
ETHYLBENZENE
UG/L
11
1
METHYLENE CHLORIDE
UG/L
ND
5
METHYL T-BUTYL ETHER
UG/L
27
5
ISOPROPYL ETHER
UG/L
ND
5
1,1,2,2-TETRACHLOROETHANE
UG/L
ND
1
TETRACHLOROETHENE
UG/L
ND
3
TOLUENE
UG/L
ND
5
1,1,1-TRICHLOROETHANE
UG/L
ND
1
1,1,2-TRICHLOROETHANE
UG/L
ND
2
TRICHLOROETHENE
UG/L
ND
1
TRICHLOROFLUOROMETHANE
UG/L
ND
2
VINYL CHLORIDE
UG/L
ND
1
XYLENES (TOTAL)
UG/L
76
2
BROMOFLUOROBENZENE (PID)
%REC/SURR
100
75-118
BROMOFLUOROBENZENE (ELCD)
°REC/SURR
109
76-125
ANALYST
INITIALS
CN
Comments:

•SEVERN TRENT LABORATORIES 11 East Olive Road Pensacola, Florida 32514 [phone]
[0) Page 7
Date 14-Aug-98
"FINAL REPORT FORMAT - SINGLE"
Accession: 807334
Client: BP OIL COMPANY
Project Number: 24288-05-
Project Name: BP SITE #24154
Project Location: 5601 W. FRIENDLY AVE., GREENSBORO, NC
Test: VOLATILES (601-602)
Analysis Method: 601/602 Mod/Federal Register, 40 CFR, Part 136, Appendix A.
Extraction Method: N/A
Matrix: WATER
QC Level: N
Lab Id: 007
Sample Date/Time: N/S
Client Sample Id: TRIP BLANK
Received
Date: 16-JUL-98
Batch: LUW110
Extraction Date: N/A
Blank: B Dry Weight o.
N/A
Analysis
Date: 23-JUL-98
Parameter:
Units:
Results:
Rpt Lmts: Q:
BENZENE
UG/L
ND
1
BROMODICHLOROMETHANE
UG/L
ND
1
BROMOFORM
UG/L
ND
2
BROMOMETHANE
UG/L
ND
2 .
CARBON TETRACHLORIDE
UG/L
ND
1
CHLOROBENZENE
UG/L
ND
1
CHLOROETHANE
UG/L
ND
5
2-CHLOROETHYLVINYLETHER
UG/L
ND
5
CHLOROFORM
UG/L
ND
2
CHLOROMETHANE
UG/L
ND
5
DIBROMOCHLOROMETHANE
UG/L
ND
5
1,2-DICHLOROBENZENE
UG/L
ND
2
1,3-DICHLOROBENZENE
UG/L
ND
2
1,4-DICHLOROBENZENE
UG/L
ND
2
DICHLORODIFLUOROMETHANE
UG/L
ND
5
1,1-DICHLOROETHANE
UG/L
ND
1
1,2-DICHLOROETHANE
UG/L
ND
1
1,1-DICHLOROETHENE
UG/L
ND
1
TRANS 1,2 DICHLOROETHENE
UG/L
ND
1
1,2-DICHLOROPROPANE
UG/L
ND
1
CIS-1,3-DICHLOROPROPENE
UG/L
ND
1
TRANS-I,3-DICHLOROPROPENE
UG/L
ND
1
ETHYLBENZENE
UG/L
ND
1
METHYLENE CHLORIDE
UG/L
ND
5
METHYL T-BUTYL ETHER
UG/L
ND
5
ISOPROPYL ETHER
UG/L
ND
5
1,1,2,2-TETRACHLOROETHANE
UG/L
ND
1
TETRACHLOROETHENE
UG/L
ND
3
TOLUENE
UG/L
ND
5
1,1,1-TRICHLOROETHANE
UG/L
ND
1
1,1,2-TRICHLOROETHANE
UG/L
ND
2
TRICHLOROETHENE
UG/L
ND
1
TRICHLOROFLUOROMETHANE
UG/L
ND
2
VINYL CHLORIDE
UG/L
ND
1
XYLENES (TOTAL)
UG/L
ND
2
BROMOFLUOROBENZENE (PID)
%REC/SURR
101
75-118
BROMOFLUOROBENZENE (ELCD)
%REC/SURR
107
76-125
ANALYST
INITIALS
CN
Comments:

,T
SEVERN TRENT LABORATORIES 11 East Olive Road Pensacola, Florida 32514 [phone]
"Method Report Summary"
Accession Number: 807334
Client: BP OIL COMPANY
Project Number: 24288-05
Project Name: BP SITE #24154
Project Location: 5601 W. FRIENDLY AVE., GREENSBORO, NC
Test: VOLATILES (601-602)
Client Sample Id:
Parameter:
4288-W-001
BENZENE
ETHYLBENZENE
METHYL T-BUTYL ETHER
TOLUENE
XYLENES (TOTAL)
4288-W-002
BENZENE
ETHYLBENZENE
METHYL T-BUTYL ETHER
TOLUENE
XYLENES (TOTAL)
4288-W-003
BENZENE
1,2-DICHLOROETHANE
ETHYLBENZENE
TOLUENE
TRICHLOROETHENE
XYLENES (TOTAL)
4288-W-005
BENZENE
ETHYLBENZENE
METHYL T-BUTYL ETHER
XYLENES (TOTAL)
4288-W-006
BENZENE
ETHYLBENZENE
METHYL T-BUTYL ETHER
XYLENES (TOTAL)
unit:
[0) Page 8
Date 14-Aug-98
Result:
2300
160
61
190
510
3800
1100
79000
2300
5000
4400
110
970
14000
38
6900
42
12
26
81
38
11
27
76

SEVERN TRENT LABORATORIES 11 East Olive Road Pensacola, Florida 32514 [phone]
(0) Page 9
Date 14-Aug-98
Common notation for Organic reporting
UG/L = PARTS PER BILLION.
UG/KG = PARTS PER BILLION.
MG/KG = PARTS PER MILLION.
MG/L = PARTS PER MILLION.
* = LESS THAN DETECTION LIMIT.
* = VALUES OUTSIDE OF QUALITY CONTROL LIMITS
SOURCES FOR CONTROL LIMITS ARE INTERNAL LABORATORY QUALITY ASSURANCE PROGRAM
AND REFERENCED METHOD.
ORGANIC SOILS ARE REPORTED ON A DRY WEIGHT BASIS.
** COMPOUNDS FLAGGED IN METHOD ARE NOT WITHIN THE FIVE POINT CURVE. THEY
ARE SEARCHED FOR QUALITATIVELY.
RECOGNIZED INITIALS:
SK-SHELLEY KEARLEY
SB-SHARON BRADDOCK
MLP-MELISSA L. PATRICK
TSD-PATRICIA DENT
SA-SUZANNE ASHMORE
CN-CARL NOBLE
LP-LEVERNE PETERSON
TR-TRACI ROBERTS

C
CRA
June 24, 1998
Mr. Paul Clark
North Carolina Department
of Environment and Natural Resources
512 North Salisbury Street
Raleigh, North Carolina 27604
Re: Groundwater Sampling Plan for
NPDES Permit Application
BP Service Station No. 24154
5601 West Friendly Avenue
Greensboro, North Carolina
CRA File: 24288-03
Dear Mr. Clark:
As you are aware, BP Oil Company ( BP) is implementing a Corrective Action Plan (CAP)
for the referenced site. It is currently planned to discharge the treated groundwater
effluent from the proposed remediation system to the area storm sewer system under a
National Pollutant Discharge Elimination System (NPDES) permit. Accordingly, BP
submitted a NPDES permit application to the North Carolina Department of Environment
and Conservation (NCDENR) for approval.
In order to approve the NPDES permit application, NCDENR has requested current
groundwater analytical data (i.e., less than one year old) for the site. On behalf of BP,
CRA Services (CRA) is pleased to present this groundwater sampling plan to collect the
NCDENR-requested data. Upon approval of this work plan by NCDENR, the groundwater
sampling event will be conducted, and the data will be forwarded to NCDENR.
Based upon the historical analytical data, the maximum observed dissolved
hydrocarbon concentrations have been detected in the vicinity of the (1) current
underground storage tank (UST) area (monitor wells MW-3 and MW-4) and (2) former
UST area (monitor wells MP-1 and MW-12). Therefore, groundwater samples will be
collected from wells MW-3, MW-4, MW-12, and MP-1; the well locations are shown on

CRA Services
Mr. P. Clark
June 24, 1998
CRA File: 24288-03
Page 2
the attached site plan. The groundwater samples and associated quality assurance
blanks (equipment blank, replicate sample, and trip blank) will be analyzed for the
following parameters:
Benzene, toluene, ethylbenzene, and total xylenes (BTEX) by EPA Method
602.
• Methyl tert-butyl ether (MTBE) by EPA Method 602.
• Isopropyl ether (IPE) by EPA Method 602.
• 1,2-Dibromoethane (EDB) by EPA Method 504.1.
• 1,2-Dichloroethane (EDC) by EPA Method 601.
• Volatile Organic Halocarbons (VOHs) by EPA Method 601.
• Base Neutrals and Acid Extractables (BNAs) by EPA Method 625 (including
tentatively identified compounds).
Upon receipt of the analytical results, a letter report of findings will be prepared and
submitted to NCDENR. We look forward to receiving your approval of this work plan and
to the finalization of the NPDES permit. Please advise if any revisions or additions to this
work plan are required by NCDENR. If you have any questions, please contact CRA or
Mr. Dan Huff, BP Oil at [phone].
Sincerely,
CRA SERVICES
Brian D. Webster, CHMM
Regional Manager
BDW:taw
Attachment: Figure 1 - Site Plan
cc: Mr. Dan Huff, BP w/ attachment

r
FIRESTONE
AUTO REPAI
(FRIENDLY TIRE
QUAKE
SHOPPI'
RE: BP —FURNISHED PLOT PLAN, DRAWING NO.
LEGEND
PROPERTY LINE
EXTRACTION WELL
MONITOR WELL
SOIL BORING
-�-
VAPOR —EXTRACTION POINT
— c —
UNDERGROUND
GAS LINE
—UT—
UNDERGROUND
TELEPHONE LINE
— s —
UNDERGROUND
STORM SEWER LINE
— w —
UNDERGROUND
WATER LINE
—ss—
UNDERGROUND
SANITARY SEWER LINE
— P —
UNDERGROUND
FUEL PRODUCT LINE
— v —
UNDERGROUND
TANK VENT LINE
—UE—
UNDERGROUND
ELECTRIC LINE
—0E—
OVERHEAD ELECTRIC LINE
—RP—
UNDERGROUND
REMEDIATION
SYSTEM PIPING
UST
UNDERGROUND
STORAGE TANK
0 feet 30
SCALE
�� p� ■�+� G&E ENGINEERING, INC.
; ENVIRONMENTAL CONSULTANTS
TO-4288—B1
SITE PLAN ORAWMG No.
No.

Project : BP Oil Service Station #24154, Greensboro
DWO # : NCG510407
Date : 4/15/98
Number of monitoring wells:
Analytical Monitoring Data Reveh
Benzene
Ethylbenzene
Total Xylenes
MTBE
1,2-Dichloroethane
Naphthalene
Total Lead
EDB
IPE
Total BTEX
Chloroform
Methylene Chloride
1,1,1-Trichloroethane
CIS-1,3-Dichloropropene
Di bromoch loromethane
1,4-Dichlorobenzene
1,1-Dichloroethane
B romod ich loromethan e
Chlorobenzene
1,1-Dichloroethane
1,1,2-Trichloroethane
Trans-1,2-Dichloroethane
Trichloroethene
BIS (2-Ethlhexyl) Phthalate
Butylbenzylphthalate
Di-N-Octyl Phthalate
Bromomethane
Division of `(Hater Quality
MEMO From:
Date: "�"Z3-58
To:
<< Subject:
4-Z-t-F19
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LLa. a� 'r uMJ
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7t fti: co w.wu.�•-L .
n+s'-D 7U IJAn+06,om
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LWS fL-�-
ENR
C 37Z nvironment and Natural Resources
PO Box 29535, Kaieign, rvum, „arolina 27626-0535 / Phone: [phone]

GP51 Initial Review Notes
Project: BP Oil Service Station #24154, Greensboro
DWQ #: NCG510407
Date: 04/14/98
To do:
[ ] Send acknowledgment letter with copy of letter with plans and specs to Regional Office (Serves as request for
RO staff report)
Noted Problem
* Alternative Engineering Analysis - Brief, states 3 alternative evaluated and determined impractical, therfore
no economic analysis performed. Is this acceptable?
* Monitoring data is 15+ months old, is the 12 month criteria a drop dead criteria?
* Data for all the required parameters was not submitted, ones associated with heavy fuels ommitted.
Contaminants identified as gas & deisel. yAs L F"�M1�v A�—„ ,� `�•� ��
s:1MT�-
* The system is composed of a oil/water seperator and Air stripper only, no particulate filters, no GAC filters.
Acceptable?
Pauc—i
* Do we need letter stating that the consultant is an authorized agent of BP Oil? ,µ r
* vi .� h�.a coat/ � r- P^'T+aa•�—S G-a
Examples of chloronated solvents

Criteria Sat.
[ ] Completed NOI and three copies of the application package
Application signed by Permittee (or authorized agent)
[ ] Plans and specifications signed and sealed by a North Carolina P.E.
[ } $400 permit fee and $150 A to C fee
[ ✓] Site plan signed and sealed by North Carolina P.E.
[ ✓r Property boundaries
[ /J Easements (must be verified if crossing private property) a
Buildings, paved and unpaved surfaces
[ ✓] Location of monitoring and recovery wells
[ Approximate location of contaminant plume r�
Treatment system location
[/1] USGS map indicating discharge location (w/ id of receiving stream and cl ssification)
[ ✓1 Source(s) of contaminants identified
Confirm free product and solids disposal
[ ] Complete engineering alternatives analysis — L +- d
[ ] Complete Ground Water Analytical Monitoring results (<= 1 year old), See 4 list
[ ✓] Data estimating the proposed effluent flow (Permittee's flow request)
? [ ] Proposed effluent data for treatment system
[ Must have three components - oil/water separator, air stripper, and GAC filter
[ ] Check size of oil/water separator (flow rate or volume), only if free product present
[ /] Check air/water ratio in air stripper ( minimum 120:1 using design review spreadsheet)
? [ ] Check size of GAC filter using Design Review checklist (must have 30 day life)
[ ] Check to see if iron fouling was considered

Groundwater Analytical Monitoring Results
[ ] Data less than or equal to 1 year old prior to application date
[ ] Data for all required Groundwater Analytical Parameters submitted -,
Contaminant
Source
Data
Submitted
Gasoline
Unleaded as
Leaded as
HEv Fue
Benzene
Toluene
-Ethylbenzene
ti
Xylene
v
TB
Phenol
1,2-dichloroethane
Naphthalene ( <1 Lvppb)
Naphthalene ( >100 ppb )
uorene
pao
Phenanthrene
►�
Lea
Y
E - i mp )
rotere
Iso ro IP )
Iron
Manganese
[ ] EPA methods used to confirm all parameters were analyzed
[ ] 602 (benzene, toluene, ethylbenzene, 1,2-dichloroethane)
[ ] 604 (phenol)
[ ] 610 (naphthalene, fluorene, phenanthrene)
[ ] 8020 (benzene, toluene, ethylbenzene, xylene)
[ ] MTBE (will likely have to be analyzed for separately)
[ ] Chlorinated solvents (individual permit required)

FIRESTONE
AUTO REPAIR
(FRIENDLY TIRE CO.)
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DUMPSTER ENCLOSURE
STORM SEWER CATCH BASIN
RE: BP —FURNISHED PLOT PLAN, DRAWING NO. 32-081-24154, DATED MAY
DESIGNED BY:
DRAWN BY: D• GRACE
CHECKED BY:
NO. REVISION BY APPROVED BY:
1
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AND REVISED JULY 11, 1990.
BP OIL COMPANY
ATLANTA, GEORGIA
Client
BP SERVICE STATION NO. 24154
5601 WEST FRIENDLY AVENUE
GREENSBORO, GUILFORD COUNTY, NORTH CAROLINA
Project Location
LEGEND
— — — —
PROPERTY LINE
EXTRACTION WELL
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MONITOR WELL
SOIL BORING
#-
VAPOR —EXTRACTION POINT
— G —
UNDERGROUND
GAS LINE
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UNDERGROUND
TELEPHONE LINE
— S —
UNDERGROUND
STORM SEWER LINE
— w —
UNDERGROUND
WATER LINE
—ss—
UNDERGROUND
SANITARY SEWER LINE
— P —
UNDERGROUND
FUEL PRODUCT LINE
— V —
UNDERGROUND
TANK VENT LINE
—UE—
UNDERGROUND
ELECTRIC LINE
—OE—
OVERHEAD ELECTRIC LINE
—RP—
UNDERGROUND
REMEDIATION
SYSTEM PIPING
UST
UNDERGROUND
STORAGE TANK
0 feel 30
SCALE
WG&E ENGINEERING, INC.
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