NC0000795_Permit (Issuance)_20011217

NPDES DOCIMENT SCANNIN` COVER SHEET
NPDES Permit:
NC0000795
Document Type:
Permit Issuance
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Complete File
- Historical
Engineering Alternatives (EAA)
Correspondence
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Permit
History
Document Date:
December 17, 2001
This' document is printed on reuse paper - ignore any
content on the reiirerse side

Michael F. Easley
Govemor
William G. Ross, Jr., Secretary
North Carolina Department of Environment and Natural Resources
Gregory J. Thorpe, Ph. D., Acting Director
Division of Water Quality
December 17, 2001
Harold Cramer, Vice President
ExxonMobil Oil Corporation
P.O. Box 18363,
Greensboro, North Carolina 27419
Subject: FINAL -- NPDES Permit No. NC0000795
ExxonMobil, Greensboro Terminal
6907 West Market Street
Guilford County
Dear Mr. Cramer:
This letter transmits your Final NPDES individual discharge permit for the above referenced facility.
ExxonMobil's comments on the draft permit (November 7, 2001) regarding system components and
flow -measurement methods have been reviewed and included. Please review this draft carefully to ensure
thorough understanding of the information, conditions, and requirements of dischargers to water supply
(WS) waters contained therein.
The Division of Water Quality (the Division) has revised permitting strategies and Standard
Operating Procedures (SOP) for this and all bulk -storage petroleum facilities and terminals in North
Carolina. As part of permit renewal, the Division has also conducted EPA -required Reasonable Potential
Analysis (RPA) on this facility's effluent data to determine the "reasonable potential" for identified
parameters to exceed North Carolina in -stream Water Quality Standards and/or federal criteria. The
following summarizes changes to your previous permit in compliance with the new 2001 SOP.
BTEX. The permittee is now required to monitor monthly for BTEX (benzene, toluene, ethyl
benzene and xylene) parameters. Please note that these replace the requirement for EPA Method 624. No
parameters have discharge limits because the RPA "maximum predicted" for each parameter did not
exceed its "allowable concentration" based on data submitted.
EPA Methods 624/625. Method 624 has been eliminated from facility monitoring if it did not
detect compounds other than BTEX. However, because the majority of facilities now store, or have
stored in the past, heavy -component fuels such as fuel oil and diesel, the Division has retained EPA
Method 625 monitoring to detect naphthalene and related indicators of middle distillate compounds
commonly found in these heavier fuels. Should the permittee wish to document that the subject facility
does not now, nor has ever stored heavier -component fuels, the Division will consider a request to
discontinue this monitoring.
Phenol. The Division has reviewed ExxonMobil's written comments on the draft permit concerning
phenol. ExxonMobil has argued that the permit limit of 0.003 lbs./day is impractical because it is not
achievable by current analytical technology. Please understand that the environment dictates the permit
limit, not the laboratory. Water -quality based permit limits are established independent of any test -method'
practical quantitation limit (PQL).
ATA
NCDENR
N. C. Division of Water Quality 1617 Mail Service Center Raleigh, NC 27699-1617 [phone] Customer Service
• 1 800 623-7748

ExxonMobil Oil Corporation
ExxonMobil, Greensboro Terminal
NPDES Permit NC0000795
Page 2
In the absence of a Division -specified PQL, most bulk -storage facilities have submitted data using
5.0 to 10.0 µg/L — some as low as 1.0 µg/L for phenol. However, because ExxonMobil has no record of
detecting phenol (albeit at a PQL of 50 µg/L), the Division will suspend compliance to this phenol limit
for one (1) year from the permit effective date so that the permittee may establish the required database
(see Effluent Limits and Monitoring Requirements). If phenol is not detected at the lowest limit of
technology, the Division will consider the permittee's request to remove the phenol limit.
ExxonMobil has suggested that phenol is not persistent in surface waters and that the Division limit
chlorinated phenol rather than phenol. However, the Division has not received conclusive evidence that
phenol biodegrades readily in the receiving stream. ExxonMobil has potential to discharge phenol and
therefore the Division must apply phenol limits at the discharge. Moreover, dilution must be applied at
some point appropriate to the water supply intake, not at the point of discharge (refer to the rationale
provided in the 2001 SOP).
MTBE is a gasoline component recently identified by the EPA as a potential human carcinogen.
Therefore, monthly monitoring has been added to this and all oil -terminal permits discharging to WS
waters within the state. After collecting additional data, ExxonMobil may request the Division to reduce
the MTBE monitoring frequency (See Special Condition A. 2.). Granting this request shall constitute a
minor modification to the NPDES permit.
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 call Joe Corporon at [phone],
extension 597.
Respectfully,
Original Signed By
David A. Goodrich
Gregory J. Thorpe, Ph.D.
Enclosure: NPDES Permit NC0000795
cc: Central Files
Winston-Salem Regional Office, Water Quality Section
NPDES Unit;
Point Source Compliance and Enforcement Unit
Technical Assistance and Certification Unit
Aquatic Toxicology Unit

Permit NC0000795
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 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,
ExxonMobil Oil Corporation
is hereby authorized to discharge wastewater from outfalls located at the
ExxonMobil, Greensboro Terminal
6907 West Market Street, Greensboro
Guilford County
to receiving waters designated as an unnamed tributary of East Fork of the Deep River within 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 February 1, 2002.
This permit and authorization to discharge shall expire at midnight on August 31, 2006.
Signed this day December 17, 2001.
Original Signed By
David A. Goodrich
Gregory J. Thorpe, Ph.D., Acting Director
Division of Water Quality
By Authority of the Environmental Management Commission

4
Permit NC0000795
SUPPLEMENT TO PERMIT COVER SHEET
ExxonMobil Oil Corporation
is hereby authorized:
1. to continue discharging storm water from the existing water pollution control system consisting of
• bermed secondary -containment areas (drain to lined settling pond)
• truck loading -racks (drain to oil / water separator, then to lined settling pond)
• vapor recovery unit (drains to oil / water separator, then to lined settling pond)
• pump manifold (drains to oil / water separator, then to lined settling pond)
• pump -back area (drains to oil / water separator, then to lined settling pond)
• hydrostatic testing of tanks and pipes (drains to oil / water separator, then to lined settling pond)
• fire -suppression system testing (drains to oil / water separator, then to lined settling pond)
• driveway rinse down (drains to oil / water separator, then to lined settling pond)
• Settling Pond (drains to UT of East Fork of the Deep River via a totalizing flow meter or other
Division -approved flow recording device or method)
located at the ExxonMobil, Greensboro Terminal, 6709 West Market Street, Greensboro, Guilford
County, and
2. to discharge from said treatment facility through Outfall 001 at a specified location (see attached
map) into an unnamed tributary (UT) of the East Fork of the Deep River, a waterbody classified
as WS-IV waters within the Cape Fear River Basin.

ExxonMobil Oil Corporation
Greensboro Terminal
Latitude: 36° 04' 34" N State Grid/Quad: C 19 SW / Guilford, NC
Longitude: 79° 55' 42" W Permitted Flow: Episodic -- not limited
Stream Class: WS-IV Drainage Basin: Cape Fear River Basin
Receiving Stream: UT of E. Fork Deep River Sub -Basin: 03-06-08
Facility
Location --
not to scale
North
NPDES Permit No. NC0000795
Guilford County

Permit NC0000795
7
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
Beginning on the effective date of the permit and lasting until expiration, the Permittee is authorized to
discharge from Outfall 001. Such discharges shall be limited and monitored by the Permittee as
specified below:
EFFLUENT
CHARACTERISTICS
LIMITS
MONITORING
REQUIREMENTS
Sample
Type
Sample
Location
Monthly Average
Daily
Maximum
Measurement
Frequency
Flowl
Episodic
1
Effluent
Total Suspended Solids
45.0 mg/L
Monthly
Grab
Effluent
Oil and Grease2
Monthly
Grab
Effluent
Phenol
0
0.003 lbs./day3
Monthly
Grab
Effluent
Benzene
Monthly
Grab
Effluent
Toluene
Monthly
Grab
Effluent
Ethyl Benzene
Monthly
Grab
Effluent
Xylene •
Monthly
Grab
Effluent
EPA 625
2/Year
Grab
Effluent
MTBE4
Monthly
Grab
Effluent
Acute Toxicity5
Annually
Grab
Effluent
Footnotes:
1. Flow — During periods of no flow, the Permittee shall submit a monthly Discharge Monitoring Report
(DMR) indicating "No discharge." Flow shall be monitored with each discharge event and may be
monitored in one of four ways:
a) measure flow continuously;
b) Rational Method — calculate flow based on total rainfall per area including built -on area
draining to the outfall (shall not be used at sites with large runoff -collection ponds);
c) estimate flow at 20-minute intervals during the entire discharge event; or
d) report flow based on discharge pump logs.
2. Oil and Grease — Where possible, the grab sample for oil and grease should be skimmed from the surface of
a quiescent (calm water) zone.
3. Phenol — Compliance to this limit shall begin one (1) year from the permit effective date. The Division will
consider a request to remove this limit if the permittee submits additional data (minimum 12 data points) for
Reasonable Potential Analysis. Permittee shall contact a North Carolina -certified laboratory to establish a
minimum Practical Quantitation Limit (PQL) for phenol.
4. MTBE — See Part A.(2.) for other requirements relating to MTBE
5. Acute Toxicity (Fathead Minnow, 24-hour), annually [see Special Condition A.(3.)].
Units: mg/L = milligrams per liter µg/1 = micrograms per liter
lbs./day = pounds per day MTBE = methyl tertiary butyl ether
The permittee shall discharge no floating solids or foam visible in other than trace amounts.
The permittee shall not discharge tank solids, tank bottom water, or the tank rag layer.
The permittee shall not discharge tank (or pipe) contents following hydrostatic testing unless benzene
concentration is less than 1.19 µg/L and toluene concentration is less than 11 µg/L.

1
Permit NC0000795
EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
SPECIAL CONDITIONS
A. (2.) MTBE MONITORING
For the protection of public health, oil terminals discharging to waters classified as water supplies
("WS" waters) shall adhere to the following action plan:
1. Monthly monitoring for MTBE (except as modified under 2.) is required for the duration
of the permit [See Part A. (1.)].
2. After a one-year Test Period of monthly monitoring or after twelve (12) discharge events
have been sampled and analyzed, the Permittee shall review MTBE data. If MTBE is not
detected, the facility may request the Division to reduce the MTBE monitoring
frequency. Granting this request shall constitute a minor modification to the NPDES
permit.
3. If MTBE is detected during the Test Period, the Permittee shall submit an MTBE
Reduction Plan. This plan may include site -specific Best Management Practices (BMPs)
or engineering solutions. A copy of this plan shall be submitted to:
North Carolina Division of Water Quality
Water Quality Section
Attn: NPDES Unit
1617 Mail Service Center
Raleigh, NC 27699-1617
4. The Division anticipates that an MTBE regulatory criterion or Water Quality Standard
will be established during the coming permit cycle. For the next cycle of permit renewals,
the Division expects to apply this criterion or standard to MTBE data collected during
this permit cycle. Should the permittee's MTBE data indicate discharge in excess of this
criterion or Water Quality Standard, an MTBE limit will be added to the permit
monitoring requirements at renewal.

4
Permit NC0000795
EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
SPECIAL CONDITIONS
A. (3.) ACUTE TOXICITY MONITORING (ANNUAL)
The Permittee shall conduct annual toxicity tests using protocols defined as definitive in EPA Document
EPA/600/4-90/027 entitled "Methods for Measuring the Acute Toxicity of Effluents to Freshwater and
Marine Organisms." The monitoring shall be performed as a Fathead Minnow (Pimephales promelas)
24-hour static test. Effluent samples for self -monitoring purposes must be obtained below all waste
treatment. The permittee will conduct one test annually, with the annual period beginning in January of
the calendar year of the effective date of the permit. The annual test requirement must be performed and
reported by June 30. If no discharge occurs by June 30, notification will be made to the Division by this
date. Toxicity testing will be performed on the next discharge event for the annual test requirement.
The parameter code for this test is TAE6C. All toxicity testing results required as part of this permit
condition will be entered on the Effluent Discharge Form (MR-1) for the month in which it was
performed, using the appropriate parameter code. Additionally, DWQ Form AT-1 (original) is to be sent
to the following address:
Attention: North Carolina Division of Water Quality
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 and accurate and include all supporting chemicallphysical 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 any test data from either these monitoring requirements 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 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.

ExxonMobil
Refining and Supply Company
Greensboro Terminal
6907 West Market Street
Greensboro, NC 27409
November 7, 2001
Mr. Joe R. Corporon, P.G.
North Carolina Department of Environment and Natural Resources
Division of Water Quality
1617 Mail Service Center
Raleigh, NC 27699-1617
Re: Draft NPDES Permit No. NC0000795
ExxonMobil Oil Corporation Greensboro Terminal
6907 West Market Street, Greensboro, NC
Dear Mr. Corporon:
EonMobil
Refining & Supply
CD
ExxonMobil appreciates this opportunity to submit comments on the draft NPDES permit proposed for
our Greensboro, NC terminal. Our comments are divided into general comments and comments on the
proposed phenol limit.
General Comments
1. Description of Activities: the description of the facility and the location of the discharge on the
supplement to the cover sheet are different from the description included in the existing permit and do
not completely represent the facility. Specifically, stormwater and wastewater are discharged from
the following sources: stormwater runoff from the bermed tank field and containment areas including
the loading rack, the v por recovery unit, the pump manifold, and the pump -back area; h droy� static
test�ing_of tanks and pipes; testes of the fire suppression system; and, driveway rinse down. Sources
other than the tank field flow through an oil/water separator. The separator and the tank field flow to
a lined collection basin, which discharges into an unnamed tributary of the East Fork of the Deep
River. Please modify the description to reflect these comments or use the description from the
existing permit.
2. Footnote 1 under A (1): this footnote states that method (b), calculation of flow based on rainfall, is
the best method for facilities with a large run-off collection pond. However, the recently issued
permit for the ExxonMobil Charlotte terminal (NC0004839) includes a footnote that states that the
same methochould not be used fnr f cilities ith large runo -cff ollecTion ponds,/� In aion, non
the listed met)'iods for calcu atton of flow eciftcally describes the use of a
which is the method presently used fo onitoring flow at this facility as identifi in the current
permit ease modi is footnote indicate that a totalizing flow meter is us to monitor flow at
this facilt
/or coaC F 4
641,6 v.c, Lkt (le Er

Mr. Joe R. Corporon, P.G.
November 7, 2001
Page 2 of 2
3. Footnote 2 under A (1): this footnote, which states that the oil and grease sample should be collected
from the surface of the quiescent zone, is not applicable for this facility, where the discharge occurs
from a bottom draw discharge pipe. This footnote should be removed.
Proposed Phenol Limitation
Although phenol has not previously been detected at this facility, a limitation has been imposed in the
draft permit. This limitation should be removed for the following reasons.
1. As described in the permit, the phenol limitation is a monthly average mass limit. According to Part
II, Section A (5) (a) of the permit, the monthly average discharge is defined as the total mass of all
daily discharges sampled and/or measured during a calendar month on which daily discharges are
sampled and measured, divided by the number of daily discharges sampled and/or measured during
such month. According to Part I (A) (1) and footnote 3, phenol is to be measure once per month with
a minimum practical quantitation limit (PQL) of 0.01 mg/L. However, when multiplied by the
average daily flow since 1998 of 0.06 mgd, the monthly average discharge with a phenol result of
<0.01 mg/L is equivalent to <0.005 lb/day, which is higher than the limit of 0.003 lb/day. It is
therefore not practical to limit phenol in this manner. Additionally, although phenol has not been
detected at this facility, the decision to impose a limitation was based on a reasonable and .potential
analysis (RPA) employing one half of the historical detection limit, which was mostly 0.05 mg/L
since neither a PQL nor a specific EPA Method was required by the existing permit. However, as the
above analysis demonstrates, treating phenol in this manner imposes impractical limitations. A more
practical approach would be to require regular monitoring of phenol with a minimum PQL of 0.01
mg/L. Based on the results of additional monitoring, another RPA could be performed.
2. The necessity of a RPA for phenol was based on 15A NCAC Chapter 2, Subchapter 2B, Section
0.0216(3)(d). This regulation references chlorinated phenols as the technical basis for the 1 µg/L
criterion. However phenol, unlike chlorinated phenol, biodegrades readily, is not persistent in surface
water, and has not been demonstrated to contribute to equivalent concentrations of chlorinated phenol
during water treatment. Chlorinated phenol and not phenol should therefore be limited.
Finally, the water balance calculations did not include the effects of dilution in the reservoir. However,
dilution will occur in the reservoir, due to other discharges, and due to upstream flows. Based on these
reasons and the preceding comments, the phenol limitation should be removed.
Thank you again for the opportunity to provide comments. We look forward to your response and would
be willing to meet to discuss the comments on the phenol limitation, if necessary. Please contact Jim
Hesser, terminal superintendent, at 336-855-4461, and advise whether a meeting will be required.
Sin +erely,
t►�
Steve D. in, P.E.
Environmental Advisor

Facility Name =
EXXON CO, USA -- GREENSBORO
Parameter =
Phenol
NPDES # =
NC0000795
Standard =
2.37
µg/l
Qw (MGD) =
1.05
7Q10s (cfs)=
0
Date
n
<
Actual Data
BDL=1/2DL
IWC (%) =
100.00
Jan-98
1
<
50
25
Feb-98
2
<
10
5
FINAL RESULTS
Apr-98
3
<
50
25
Phenol
May-98
4
<
50
25
Max. Pred Cw
38.0
Aug-98
5
<
50
25
Allowable Cw
0.0
Oct-98
6
<
50
25
Jan-99
7
<
50
25
Apr-99
8
<
50
25
RESULTS
Jul-99
9
<
50
25
Std Dev.
5.5470
Sep-99
10
<
50
25
Mean
23.5
Oct-99
11
<
50
25
C.V.
0.2364
Feb-00
12
<
50
25
Apr-00
13
<
50
25
Number
of data points
13
HITS
none @ 50ugL
Mult Factor =
- 1.52
Max. Value
2
1
Max. Pred Cw
38.0
µ 1
"reasonable potential" dictated by inappropriate PQLs
Allowable Cw
2.3
f
gll
Add note to cover letter.
,r►
504
L(1,9D, (-)
GL
�y
eg)
ExxonMobile — Greensboro, NC0000795 Page 4

wasteload allocation was distributed equally among phenol dischargers as a permit limit, only as each
facility's data -set showed reasonable potential to exceed the water quality stream standard.
Currently nine (9) bulk storage facilities discharge to either the East Fork Deep River or Long
Branch. The confluence of these two drainages was assumed to approximate the headwaters of High
Point Lake, the nearest downstream intake waterbody. For purposes of yield calculations, Long
Branch was assumed to have a similar runoff coefficient as the East Fork of the Deep River. The
Division used published 30Q2 flows from an EPA stream gauge (02099000) located on the East Fork
Deep River near the confluence of the two drainages. The 30Q2 flow, not the 7Q10, was deemed
appropriate because of the aesthetic standard for phenol.
Flow Calculations:
Given: Flow (30Q2) East Fork Deep River = 3.8 cfs (USGS Gauging Station)
Drainage Area East Fork Deep River = 14.8 mil (USGS)
Drainage Area Long Branch = 3.84 mi2 (measured from USGS topo)
Total Drainage Area = 14.8 mi2 + 3.84 mi2
= 18.6 mil
Yield = East Fork Flow (cfs)
East Fork Drainage Area (mi2)
= 3.8 cfs
14.8 mil
= 0.257 cfs/mi2
Therefore:
Total Flow = Yield x Total Drainage Area
0.257 cfs/mil x 18.6 mi2
4.7 cfs
Phenol Wasteload Calculation:
4.7 cfs x 0.001 mg/L x 8.34 = 0.025 lbs./day distributed among nine
1.55 dischargers
= 0.025 lbs./day
9 dischargers
Phenol Limit = 0.003 lbs./day per discharger
Because the permittee reported phenol using a Practical Quantitation Level (PQL) of <50 µg/L, there
is "reasonable potential" due to the insensitivity of the analytical testing. In the absence of data at a
PQL of <10 µg/L, the Division has imposed a phenol limit 0.003 lbs./day as a Monthly Average. A
footnote will be added to the permit alloying the permittee to collect additional phenol data (minimum
12 data points) and petition for a new RPA. A minimum PQL of <10 µg/L will be specified for all
future analyses consistent with other facilities governed by the 2001 SOP discharging to WS waters.
Fact Sheet
Renewal -- NPDES NC0000795
Page 4

State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
Michael F. Easley, Governor
William G. Ross, Jr., Secretary
Gregory J. Thorpe, Ph.D., Acting Director
MEMORANDUM
To:
From:
Subject:
October 10, 2001
Lee Spencer
NC DENR / DE1-I / Regional Engineer
Winston-Salem Regional Office
Joe Corporon
NPDES Unit
Review of Draft NPDES Permit NC0000795
ExxonMobile — Greensboro Terminal
Guilford County
A7A
NCDENR
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
RECEIVED
N.C. Dept. of ENR
OCT 122001
Wii
Please indicate below your agency's position or viewpoint on the draft permit and return this form by
November 9, 2001. 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.
NVAN
ww/ivwwww/ivwwwwwwwwvVAN 'wwwwwwwwwww/VVANA ANANNNViAwAiv NANANi
RESPONSE: (Check one)
R.-----
Concur 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:
Signed Date:
1617 Mail Service Center, Raleigh, North Carolina 27699-1617
VISIT US ON THE INTERNET @ http://h2o.enr.state.nc.us/NPDES
919 733-5083, extension 538 (fax) 919 733-0719
Christie.Jackson@ ncmail.net

DENR / DWQ / NPDES Unit
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
NPDES Permit No. NC0000795
INTRODUCTION
ExxonMobil Oil Corporation, (herein referred to as ExxonMobil or the permittee), formerly permitted
as Exxon Company, USA, requires a National Pollutant Discharge Elimination System (NPDES)
permit to dispose treated wastewater to the surface waters of the state. The Permittee's 5-year NPDES
permit has expired and they have requested renewal from the Division of Water Quality (the
Division). This Fact Sheet summarizes background information and rationale used by the Division's
NPDES Unit to determine permit limits and conditions. This document also contains references to
information sources relevant to this permit renewal (superscripted numbers in order of appearance,
See References).
FACILITY RECORDS REVIEW
Facility Description. ExxonMobil (Table 1) operates the ExxonMobil, Greensboro Terminal, a petroleum
bulk -storage and fuel -distribution center in Guilford County. Discharge from the facility consists of
stormwater runoff controlled by a Water Pollution Control System consisting of: truck -loading rack drains;
oil/water separator; waste holding tank with optional offsite disposal; gravity drains to dike containment
areas; and discharge control valves. Discharge travels to a drainage ditch, then to an unnamed tributary
(UT) to the East Fork of the Deep River.
Table 1.
ExxonMobil — Water Pollution Control System
Facility Information
Applicant/Facility Name 1,2
ExxonMobil Oil Corporation /
ExxonMobil, Greensboro Terminal
Applicant Address 1,2
P.O. Box 18363, Greensboro 27419
Facility Address 1,2
6907 West Market Street, Greensboro 27409
Permitted Flow (MGD) 43
Not limited
Type of Waste 1,2,4
Industrial runoff wastewater. SIC Code 5171
WW Code Prim. 37; Second. 39;
Facility/Permit Status 1,2,4
Class I, Minor / Renewal
Drainage Basin / County 1'2
Cape Fear / Guilford
Miscellaneous
3
Receiving Stream 4
UT of the East Fork of
the Deep River
Regional Office
Winston - Salem
Stream Classification 1'5
WS-IV
State Grid /
USGS Topo Quad°
C 19 SW /
Guilford, NC
303(d) Listed? 6
Not listed
Permit Writer
Joe R. Corporon
Subbasin 5
03-06-08
Date:
080ct01
Drainage Area (sq. mi.)
1
Lat. 36° 04' 34" Long. 79° 55' 42"
Summer 7Q10 (cfs) 3'7
0.0
Winter 7Q10 (cfs) 3'7
0.0
30Q2 (cfs) 3'7
0.0
Average Flow (cfs) 3'7
0.0
IWC(%)3'7
100
Fact Sheet
Renewal -- NPDES Permit NC0000759
Page 1

This permit became effective August 1, 1996 (with an expiration date of March 31, 2001). The
Division extended the expiration date (to stager the renewal workload) to expire August 31, 2001.1,2
On February 1, 2001, the Division received the Permit Renewal/Change of Ownership documents
(Exxon Company, USA became ExxonMobil Oil Corporation.) and the name change was
acknowledged on October 2, 2001.
Waste Load Allocation (WLA). The Division reviewed the WLA in April 1991 and developed
effluent limits and monitoring requirements based on an in -stream waste concentration (IWC) of
100% (zero -flow stream). The Division judges these limits and monitoring requirements to be
appropriate for this renewal with the exception of additions and deletions listed below (see
PERMITTING APPROACH SUMMARY).
Verifying Existing Stream Conditions. This facility discharges to a "zero -flow" stream, an
unnamed tributary (UT) of the East Fork of the Deep River, a Class WS-IV NSW stream within the
Cape Fear River Basin. East Fork of the Deep River is not listed as an "impaired" waterbody [not
303(d) listed].6
COMPLIANCE REVIEW
Discharge Monitoring Reports (DMR) -- Effluent Data Review. DMRs were reviewed from
January 1997 through July 2001.9 Discharges from Outfall 001 occurred episodically, but
approximate 2 to 8 monthly — non -discharge months reported as "no flow." The permittee reported a
maximum discharge of 1.050 MGD (September 2000). Therefore, this flow was used for reasonable
potential calculations (see below). Monitoring parameter and Reasonable Potential Analysis (RPA)
results are summarized in Table 2:
Table 2.
ExxonMobil -- DMR Review Summar
Parameter
Samples
(n
Hits
(n)
High
Mean
RP*
yln
Comments / Action
Flow
47
--
1.050
MGD
--
--
High used for RPA
Benzene
13
0
--
--
No
One (1) test
@ PQL <50
Toluene
8
0
--
--
No
--
Ethyl benzene
8
0
--
--
No
--
Xylene
8
0
--
--
No
--
Phenol
13
0
--
--
Yes (?)
Test PQL @ 50 µg/1
judged insufficient.
Added permit limit.
Note to cover letter.
Oil & Grease
13
1
2.10
mg/L
0.542
mg/L
No
BPJ Standard
30 mg/L
Eight (8) Added Phenols
8
0
--
--
--
--
TOX (1998 — 2001)
4 (annual)
--
--
--
--
All "pass"
EPA 624/625
8
0
--
--
--
Retain 625
Delete 624
*RP
mg/L
µg/l
= "Reasonable Potential" to exceed in -stream Water Quality Standard.
= milligrams per liter
= micrograms per liter
Fact Sheet
Renewal -- NPDES NC0000795
Page 2

0
w.
Based on the Division's our review of the DMRs, twice -annual EPA 624/625 scans did not detect
semi -volatile or volatile organic compounds. Total suspended residue (TSR) results do not exceed
recommended levels (one-year average 9.47 mg/L; maximum reported 14.4 mg/L, July 1999).
Notices of Violation (NOVs). No NOVs were issued to this facility during this permit cycle.
Facility Inspections. Due to staff shortages and regional priorities, this Class I Stormwater
Treatment System has been assigned lower priority relative to other discharge systems, however
starting this permit cycle, the Winston-Salem Regional Office has scheduled regular annual
inspections for this and all bulk -petroleum storage facilities in the Greensboro area.'°
Whole Effluent Toxicity (WET) Test. The facility has passed its annual acute toxicity test for four
(4) years, from 1998 through year 2001.
PERMITTING STRATEGY
Revised Standard Operating Procedures (SOP). The Division of Water Quality has revised
permitting strategies and SOP for this and all oil terminals in the state.8 A new document has been
generated by the NPDES Unit entitled, "Standard Operating Procedures — Permit Requirements for
Discharges from Oil and Petroleum Storage Facilities" (based on a 1996 SOP). This document,
hereafter referred to as the 2001 SOP, addresses issues and delineates monitoring frequencies and
permit limits for contaminants commonly found at these facilities.
Summary of Compliance Under 2001 SOP. Under the 2001 SOP, flow monitoring will be
changed from "monthly" to "episodic" (Parts L.A.). This facility's effluent data shall be evaluated for
compliance with acute toxicity, TSS, and oil and grease (Parts L.B. through I.D.). In place of EPA
Methods 624/625 monitoring requirements, and/or eight (8) chlorophenols specified in a previous
permit, the permittee shall now monitor monthly for total phenolic compounds only (Phenols -- Part
I.E.), as required for all WS (water supply) waters. Monthly monitoring shall include benzene,
toluene, ethyl benzene, and xylene (BTEX — Part MLA.). The Division shall also require monthly
monitoring for MTBE (2001 SOP Part 1.1.) considering WS waters. 8
Footnotes to the Effluent Limits and Monitoring Requirements page shall reflect no direct discharge
of tanks solids, tank bottom water, or the tank rag layer. Footnotes also stipulate no direct discharge
of hydrostatic test water if benzene and/or toluene concentrations exceed their respective water
quality standard (2001 SOP, Parts I.G. and LH).
Phenol — Monitoring and Limits Calculations. When combined with chlorine, phenol can cause
taste and odor (organoleptic) problems in drinking water, and can also result in the tainting of fish
tissues. Therefore, in accordance with the 2001 SOP, all dischargers to state water supply (WS)
waters shall conduct monthly effluent monitoring for total phenol. Moreover, if analytical results
suggest "reasonable potential," a phenol limit shall be included in the permits
A phenol limit magnitude depends on dilution. Ideally dilution would be calculated at the High Point
Dam water plant intake where chlorine is introduced, but it is impractical at this time to measure
dilution under lake conditions at the intake. Therefore, the Division calculated flow at the assumed
headwaters of this water supply. Secondly, the Division used 1 µg/L (the aesthetic limit for phenol) to
calculate a wasteload allocation in pounds per day (lbs./day) at these headwaters. Finally, the
Fact Sheet
Renewal -- NPDES NC0000795
Page

wasteload allocation was distributed equally among phenol dischargers as a permit limit, only as each
facility's data -set showed reasonable potential to exceed the water quality stream standard.
Currently nine (9) bulk storage facilities discharge to either the East Fork Deep River or Long
Branch. The confluence of these two drainages was assumed to approximate the headwaters of High
Point Lake, the nearest downstream intake waterbody. For purposes of yield calculations, Long
Branch was assumed to have a similar runoff coefficient as the East Fork of the Deep River. The
Division used published 30Q2 flows from an EPA stream gauge (02099000) located on the East Fork
Deep River near the confluence of the two drainages. The 30Q2 flow, not the 7Q10, was deemed
appropriate because of the aesthetic standard for phenol.
Flow Calculations:
Given: Flow (30Q2) East Fork Deep River = 3.8 cfs (USGS Gauging Station)
Drainage Area East Fork Deep River = 14.8 mil (USGS)
Drainage Area Long Branch = 3.84 mi2 (measured from USGS topo)
Total Drainage Area = 14.8 mi2 + 3.84 mi2
= 18.6 mi2
Yield = East Fork Flow (cfs)
East Fork Drainage Area (mi2)
= 3.8cfs
14.8 mil
0.257 cfs/mi2
Therefore:
Total Flow = Yield x Total Drainage Area
0.257 cfs/mi2 x 18.6 mi2
4.7 cfs
Phenol Wasteload Calculation:
4.7 cfs x 0.001 mg/L x 8.34 = 0.025 lbs./day distributed among nine
1.55 dischargers
0.025 lbs./day
9 dischargers
Phenol Limit = 0.003 lbsJday per discharger
Because the permittee reported phenol using a Practical Quantitation Level (PQL) of <50 µg/L, there
is "reasonable potential" due to the insensitivity of the analytical testing. In the absence of data at a
PQL of <10 µg/L, the Division has imposed a phenol limit 0.003 lbs./day as a Monthly Average. A
footnote will be added to the permit alloying the permittee to collect additional phenol data (minimum
12 data points) and petition for a new RPA. A minimum PQL of <10 µg/L will be specified for all
future analyses consistent with other facilities governed by the 2001 SOP discharging to WS waters.
Fact Sheet
Renewal -- NPDES NC0000795
Page 4

Summary of Reasonable Potential Analysis (RPA). The Division conducted an EPA -mandated
RPA on ExxonMobil's reported data for BTEX, total phenols, and oil and grease (O&G). Results
indicate no "reasonable potential" for BTEX and O&G parameters, however there is "reasonable
potential" for phenol to exceed in -stream Water Quality Standards. Therefore, the allocation of 0.003
lbs./day phenol will be included as a permit limit, per the 2001 SOP.
PERMITTING APPROACH SUMMARY
Per DWQ/NPDES Unit's 2001 SOP:
• Incorporated BTEX monitoring (replaces benzene/xylene), frequency Monthly per
the 2001 SOP.
• Removed EPA Method 624 monitoring; "no parameters detected."
• Method EPA 625 monitoring remains at 2/Year per the 2001 SOP.
• Phenol remains in permit with added permit limit due to questionable "reasonable
potential;" no change in Monthly monitoring frequency.
• Per requirement for WS waters, added Monthly MTBE monitoring, no limit.
PROPOSED SCHEDULE OF ISSUANCE
Draft Permit to Public Notice: October 10, 2001.
Permit Scheduled to Issue: November 26, 2001
NPDES UNIT CONTACT
If you have questions regarding any of the above information or on the attached permit, please
contact Joe Corporon at [phone] ext. 597.
NAME:
,4425K
Fact Sheet
Renewal -- NPDES NC0000795
Page 5
DATE: /1 (-6(

REFERENCES
1. 2001. NPDES Permit Application Short Form C. for ExxonMobil Oil Corporation, NC0000795,
February 27.
2. 2001. NPDES Permit Name / Ownership Change Form, for ExxonMobil Oil Corporation, previously
owned by Exxon Company, USA, August 24.
3. 1996. NPDES Permit NC0000795, issued to Exxon Company, USA (now ExxonMobil Oil
Corporation), expired March 31, 2001 — extended by the Division to August 31, 2001. Copies
may be obtained through The Division of Water Quality, Central Files, Archdale Building, 512
N. Salisbury St., Raleigh, North Carolina.
4. 2000. Active NPDES Permits List, North Carolina Division of Water Quality, NPDES Unit, on the
web at http:/h2o.enr.state.nc.us/NPDES/NPDESweb.html.
5. 2000. Cape Fear Basinwide Water Quality Plan. North Carolina Division of Water Quality, Water
Quality Section, July.
6. 2000. 303(d) List of North Carolina Impaired Waters - Draft. North Carolina Division of Water
Quality, Water Quality Section. Copies may be obtained through the Planning Branch,
Archdale Building, 512 N. Salisbury St., Raleigh, North Carolina.
7. 1991. NPDES Waste Load Allocation Work Sheet, NPDES Permit NC0000795, conducted for Exxon
Company, USA, permit now issued to ExxonMobil Oil Corporation, modeled by Permits and
Engineering Unit, April 3.
8. 2001 Standard Operating Procedures (Revised), 2001 NPDES Permitting Strategy, North Carolina
Bulk Storage Oil Terminals, NPDES Unit, Natalie Sierra, July 30.
9. 1998-2001. Discharge Monitoring Reports (DMR) for Effluent (DEM Form MR-1), Exxon Company,
USA, permit now issued to ExxonMobil Oil Corporation beginning January 1998 through July
2001.
10. 2001 Personal Communication from Jenny Rankin (WSRO) to Joe Corporon (NPDES Unit),
Greensboro oil terminal site visits and records, August 22.
Fact Sheet
Renewal -- NPDES NC0000795
Page 6

roit
REGIONAL OFFICE COMMENTS
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NAME:
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REGIONAL SUPERVISOR:
DATE: 1 a ' 2 - C! l
DATE: / M C7-6,7-` G
NPDES SUPERVISOR: DATE:
Fact Short
Renex%al -- IDES M:00 079►5
Page 7

IhtWS OL RCC0r11
Published by
News & Record, Inc.
Greensboro, North Carolina
North Carolina, Guilford County Affidavit of Publication
Before the undersigned, a Notary Public of said County and State, duly commissioned, qualified and authorized by law to administer oaths,
personally appeared Ashley Bowles who being first duly sworn, deposed and says:
IN12/01
I. That she is the Publisher's Representative of the Greensboro News & Record, Inc. a corporation, engaged in the publication of newspapers
known as "News & Record", published, issued and entered as second class mail in the City of Greensboro in said County and State.
2. That she is authorized to make this affidavit and sworn statement; that the noticc or other legal advertisement, a copy of which is attached
hereto, was published in the News & Record on the above listed dates.
3. That the said newspaper (or newspapers) in which such notice, p , document
each and every such publication, a newspaper meeting all of the req
North Carolina and was a qualified newspaper within the meaning
Publishers Roprosentalivo
Sworn to and subscribed before me, this
Nc t Ica c
Notary Public
My commission expires: August 23. 2005
vertiselnent was published was, at the time of
of -Section 1-597 of the General Statutes of
al Statut of No Carolina.
NCDENRJDWQMPDES
VALERIE MCNEII.
NOTARY PUBLIC
GUILFORD COUNTY, NC
Commission f.,«,» 0.73.10105
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Re: Draftpermit for ExxonMobi]. Greensboro
Subject: Re: Draft permit for ExxonMobil, Greensboro
Date: Thu, 18 Oct 2001 10:43:54 -0400
From: Joe Corporon <[e-mail]>
To: [e-mail]
Steve, please find attached the Fact Sheet (includes phenol assumptions and
calculations) and the RPA Summary for parameters of concern. As discussed, the
Division would appreciate your providing comments, if any, by November 15 to
facilitate a Final Permit before the end of the year.
Thanks,
--Joe Corporon, P.G.
NPDES Unit
[e-mail] wrote:
> Joe,
> I am the technical advisor who will be coordinating the review and
> development of comments for the draft permit for Greensboro. To facilitate
> our review, could you provide a copy of the Fact Sheet, RPA, phenol loading
> calculations? Additionally, could you clarify the date by which comments
> are due? The letter accompanying the permit is dated October 10, 2001.
> However, we would like to have 30 days to review the permit and the Fact
> Sheet.
> Please give me a call at 410-280-9750 or feel free to reply to this e-mail.
>
> Thanks,
> Steve D. Giffin, P.E.
> Environmental Advisor
> Downstream SHE Field Support
> 1009 Bay Ridge Avenue, PMB 110
> Annapolis, MD 21403
> 410-280-9750 (9751 - fax)
> steve.d.giffinL?exxonmobil.com
RPA Summary.doc
Name: RPA Summary.doc
Type: Microsoft Word Document (application/msword)
Encoding: base64
Exxon 00795 -- Fact Sheet DRAFT.doc
Name: Exxon 00795 -- Fact Sheet DRAFT.doc
Type: Microsoft Word Document (application/msword)
Encoding: base64
1 of 1 10/18/01 10:52 AM

NOTE TO FILE
NC0000795
ExxonMobile Oil Corporation, Greensboro Terminal
Joe Corporon
150ct01 -- Received call from Jim Hesser (Permittee, Terminal Supervisor); "received Draft
Permit; looks ok, but addressed to wrong person (Cramer); send all future correspondence to
me."

t2PA
Reasonable Potential Request Form
Facility Name
EXXON Co, USA -- Greensboro
NPDES Number
NC0000795
Permitted Flow Rate (MGD)
Not limited - intermittent
7Q10 Stream Flow (cfs)
0
Receiving Stream
UT of East Fork of the Deep River
( 6688) et,SW
Stream Classification
WS-IV
30Q2 Stream Flow (cfs)
0
Average Stream Flow (Qavg) (cfs)
0
TWC/,Z100
Date Requested: August 1, 2001
Projected Date for Completion (add one week to date requested): August 15, 2001
Requested Parameters (Spell out):
Phenols
Benzene
Xylene
1EPA 624 - list number of hits by parameter
EPA 625 - list number of hits by parameter
Oil and grease
Check-TOX compliance
.sJ rioZ,

NC0000795.xls
Subject: NC0000795.xls
Date: Wed, 03 Oct 2001 10:02:03 -0400
From: [e-mail]
To: Mike Myers <[e-mail]>
CC: Joe Corporon <[e-mail]>
ND with no attachment: Phenols,Benzene,Xylene,Oil&Grease for 3/98,
5/98-7/98,9/98,11/98,12/98,2/99,3/99,5/99,6/99, 8/99,11/99-1/00, 3/00,5/00-12/00.
Missing data: 11/2000, 1/01-9/01.
BDL with no attachment: Phenols,Benzene,Xylene,Oil&Grease for 1/1998.
Thank you,
Shahnaz
} Name: NC0000795.xls
NC0000795.xls Type: Microsoft Excel Worksheet (application/vnd.ms-excel);
Encoding: base64
Q05,94M
1 of 1 10/3/01 10:03

NC0000.795.xls
Subject: NC0000795.xls
Date: Mon, 27 Aug 2001 10:14:21 -0400
From: [e-mail]
To: Mike Myers <[e-mail]>
Effluent for November 2000 is missing.
For Jan 1999-Dec 1999, Jan 2000, March 2000-October 2000 and December 2000 Phenols, Benzene,
Xylene and Oil&Grease are
For Februay 2000 Phenols, Benzene, Xylene are ND .
, nalltieWai,
Jan 1999,
April 1999,
July 1999,
Sept 1999,
Oct 1999,
Feb 2000,
April 2000,
Total Suspended Solids = 12.7
Total Suspended Solids = 4.8
Total Suspended Solids = 14.4
Total Suspended Solids = 15
Total Suspended Solids = 11
Total Suspended Solids = 4.8
Total Suspended Solids = 3.6
Oil&Grease = 2.1
FINC0000795.xls
Name: NC0000795.xls
Type: Microsoft Excel Worksheet (application/vnd.ms-excel)
Encoding: base64
1 of 1
8/27/01 10:16

Whole Effluent Toxicity Testing Self -Monitoring Summary
FACILITY REQUIREMENT YEAR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC
ft
September 25, 2001
Ellerbe WWTP Perm chr lim: 61%
NC0021784/001 Bcgin:3/1/1999 Frequency: Q Jan Apr Jul Oct
County: Richmond Region: FRO Subbasin: YADIO
PF: 0.18 Special
7Q10: 0.18 IWC(%)61.0 Order:
+ NonComp:Single
1997 Fail Pass — Pass — Pass — — Fad Pass
1998 Pass — — Fail Pass — Pass — — Pass — —
1999 Pass — — Pass — -- Pass — — Pass — —
2000 Late Fad 27.4,45.96 Fail 84.9 81 >90,Pass — — Pass
2001 Pass — — Pass — — Pass
Enfield WWTP Penn chr lim: 7% 1997 — 66 66 35 >100 >100 >100 >100 >100 — >100 Late
NC0025402/001 Begin:12/1/2000 Frequency: Q Feb May Aug Nov + NonComp:Singlc 1998 Late Late >100 — -- 40 — — 20 -- >100
County: Halifax Region: RRO Subbasin: TAR04 1999 — — NR/35 — — >100 — Late >100 — 71 —
PF: 1.0 Special 2000 — >100 — — >100 — — Late >100 — >100
7QI0: 20 IWC(a/.):7.0 Order: 2001 — <7 >54 >28 >100 —
Erwin WWII' I'ezm 48hr LC50 ac lim: 30% Carlo or Daph 1997 >100 — — 88.4 — — >100 -- -- >100
NC0064521/001 Begin:8/1/1996 Frequency:Q + Jan Apr Jul Oct NonComp:Single 1998 67.3 — — 64.5 — — >100 --- — >100 — —
County: Haman Region: FRO Subbasin: CPFI3 1999 >100 — — 61,65.7 — — >100 — — 55 — —
PF: 1.2 Special 2000 30.8 — — >100 — — >100 — — 46.5 —
7Q10:586 IWC(%):0.32 Order: 2001 35.4 — — >100 — >100
Etowah W WCP Pcrm chr lim: 54H.; when relocate to French Broad no tox 1997 — — Pass — — Pass — — Fan Pass — Pass
NC0071323/001 Bcgin:10/I11995 Frequency: Q P/F + Mar Jun Sep Dec NonComp:Single 1998 — — Pass — — Pass — — Pass — — Fail
County: Henderson Region: ARO Subbasin: FRB02 1999 Pass — Pass — — Pass — — Pass — — Pass
PF: 0.065 Special 2000 — — Pass — — Pass — — Pass -- Pass
7QI0:0.08 IWC(%)54 Order: 2001 — — Pass — — Pass —
Express Fond Mart Pam chr lim: 90% (New peon 10/I2001) 1997 —
NC0085545/001 Bcgin:7/1/1996 Frequency: Q P/F + MarJun Sep De NonComp:Singlc 1998 —
County: Catawba Region: MRO Subbasin: CTB32 1999 —
PF: 0.0115 Special 2000 —
7Q10:0.0 IWC(S:):100 Order: 2001 H
— Pa- ss
H H
— — Fail — -- Pass
— NR Fait <60sigt Btsig <30
H H H
H
Pass
H
Exxon Co -Charlotte Marketing Terminal Pcrm 24hr LC50 ac monit cpis fthd (grab) (New perm 9/12001) 1997 — — >t00 — — — — — —
NC0004839/001 Begin:9/1/1996 Frequency: A NonComp: 1998 — — — >100,>100 -- — — — —
County: Mecklenburg Region: MRO Subbasin: CTB34 1999 — — >100 — — — — — —
PF: NA Special 2000 — — >100 — — — — — >100
7QI0:0.0 IWC(%)NA Order: 2001 — — Bt — — — —
Exxon Co. Selma Pcrm 24hr LC50 ae mend( cpis fthd (grab) 1997 >100 — — — — —
NC0027006/001 Begin:9/1/1999 Frequency: A NonComp: 1998 BI — — >100 — •—
County: Johnston Region: RRO Subbasin: NEU02 1999 — >100 — •— —
PF: VAR Special 2000 — — — — >100 — —
7Q10: 0 IWC(%):100 Order: 2001 -- — >100 — — — —
Exxon USA Wilmington Terminal Penn 24hr LC50 ac monit erns fthd (grab) 1997 — — — — — — — — — — H
NC0073 18 1 /001 Begin:7/1/1996 Frequency: A NonComp: 1998 — — >100 — — — — — —
County. New Hanover Region: WIRO Subbasin: CPF17 1999 -- — — — >100 — — -- —
PF: VAR Special 2000 — — — -- — -- >100
7QI0: TIDAL IWC(%)NA Order: 2001 — — — — —
Exxon/Greensboro Marketing Terminal Parn 24hr LC50 ac monit cpis Rini (Grab) 1997 — >100 — — —
NC0000795/001 Bcgin:6/I/1996 Frequency: A NonComp: 1998 Bt — — >100,4.100 —
County: Guilford Region: WSRO Subbasin: CPF08 1999 >100 -- — — —
PF: NA Special 2000 — >100 —
7Q10: 0.0 IWC(Y.):100 Order 2001 — — >100sig
Fair Bluff WWTP Pcrm chr dim: 0.26°/. 1997 — NR/<12.5 >100 •— NR <12.5 — 32.01• -- — >52
NC0020729/001 Begin:1/12000 Frequency. Q Feb May Aug Nov + NonComp: Single 1998 — >52 — — >52 — — 4431 — — >52
County: Columbus Region: WIRO Subbasin: LUM51 1999 — >52 — — >52 — — >52 — — >52
PF: 023 Spacial 2000 — Bt — — Pass — — Pass — — Pass
7Q10: 138 IWC(%):0.257 Order. 2001 — Pass — — Pass — — Pass
Fairfield Harbor Subdivision Pcrm 24hr p/f ac lim: 90% fthd(no tox until (a) I.OMGD) 1997
NC00331 11/001 Begin:9/12000 Frequency: Q + Mar Jun Sep Dv + NonComp:Single 1998
County: Craven Region: WARO Subbasin: NEUIO 1999
PF: 1.00 Special 2000
7Q10: TIDAL IWC(%)NA Order. 2001
9 Pm 1997 Data Available
LEGEND:
PERM = Permit Requirement LET= Administrative Letter - Target Frequency -Monitoring frequency. Q- Quarterly; M- Monthly; BM- Bimonthly, SA- Semiannually; A- Annually, OWD- Only when discharging D- Discontinued monitoring requirement
Begin - First month required 7Q10 = Receiving stream low flow criterion (efs) += quarterly monitoring increases to monthly upon failure or NR Months that testing must occur - ex. Jan. Apr, Jul, Oct NonComp = Current Compliance Requirement
PF - Pcrmincd flow (MCI)) IWC% = Ingram waste concentration P/F v Pass/Fail test AC = Acutc CHR — Chronic
Data Notation: f - Fathead Minnow; • - Ccriodaphnia sp.; my - Mysid shrimp; ChV - Chronic value; P - Mortality of stated percentage at highest concentration; at - Performed by DWQ Aquatic Tox Unit; bt - Bad test
Reporting Notation: -- = Data not required; NR - Not reported Facility Activity Status: I - Inactive. N - Newly Issued(fo construct); H - Active but not discharging t-Mote data available for month in question; • = ORC signature needed
19

ismt
Facility Name =
NPDES # =
Qw (MGD) =
Average Q (cfs)=
EXXON CO, USA -- GREENSBORO
NC0000795
1.05
0
FINAL RESULTS
Benzene
Max. Pred Cw
Allowable Cw
308.4
1.2
RESULTS
Std Dev.
Mean
C.V.
Number
of data points
HITS
Mult Factor =
Max. Value
Max. Pred Cw
Allowable Cw
6.7318
2.7
2.4652
13
None
12.33
25.0 µgll
308.4 AO
1.19 µg/1
Parameter =
Standard =
Benzene
1.19
µgn
Date n < Actual Data BDL=1/2DL
Jan-98 1 < 5.0 2.50
Feb-98 2 < 1.0 0.50
Apr-98 3 < 50.0 25.0 high PQL!
May-98 4 < 1.0 0.50
Aug-98 5 < 1.0 0.50
Oct-98 6 < 1.0 0.50
Jan-99 7 < 1.0 0.50
Apr-99 8 < 2.0 1.00
Ju1-99 9 < 1.0 0.50
Sep-99 10 < 1.0 0.50
Oct-99 11 < 1.0 0.50
Feb-00 12 < 1.0 0.50
Apr-00 13 < 5.0 2.50
"reasonable potential" dictated by inappropriate PQLs

a
e.
fa� /4"b,
Facility Name =
NPDES # =
Qw (MGD) =
7Q10s (cfs)=
1WC (%) =
EXXON CO, USA -- GREENSBORO
NC0000795
1.05
0
100.00
FINAL RESULTS
Toluene
Max. Pred Cw
Allowable Cw
10.8
11.0
RESULTS
Std Dev.
Mean
C.V.
Number
of data points
HITS
Mult Factor =
Max. Value
Max. Pred Cw
Allowable Cw
0.9978
1.3
0.7602
8
None
4.33
2.5 µg/1
10.8 µg/1
11.0 µg/1
Parameter =
Standard =
Toluene
11A
Date n < Actual Data BDL=1/2DL
Oct-98 1 < 1.0 0.5
Aug-98 2 < 1.0 0.5
Oct-99 3 < 5.0 2.5
Sep-99 4 < 1.0 0.5
Apr-00 5 < 5.0 2.5
Feb-00 6 < 1.0 0.5
Mar-01 7 < 5.0 2.5
Apr-99 8 < 2.0 1.0

4
Facility Name =
NPDES # =
Qw (MGD) =
Average Q (cfs)=
EXXON CO, USA -- GREENSBORO
NC0000795
1.05
0
FINAL RESULTS
Ethylbenzene
Max. Pred Cw
Allowable Cw
10.8
383.0
RESULTS
Std Dev.
Mean
C.V.
Number
of data points
HITS
Mull Factor =
Max. Value
Max. Pred Cw
Allowable Cw
0.9978
1.3
0.7602
8
None
4.33
2.5 µg/1
10.8 µg/1
383.0 µg/1
Parameter =
Standard =
Ethylbenzene
383.0
Date n < Actual Data BDL=1/2DL
Oct-98 1 < 1.0 0.5
Aug-98 2 < 1.0 0.5
Oct-99 3 < 5.0 2.5
Sep-99 4 < 1.0 0.5
Apr-00 5 < 5.0 2.5
Feb-00 6 < 1.0 0.5
Mar-01 7 < 5.0 2.5
Apr-99 8 < 2.0 1.0

Facility Name =
NPDES # =
Qw (MGD) =
7Q10s (cfs)=
1WC(%) =
EXXON CO, USA -- GREENSBORO
NC0000795
1.05
0
100.00
FINAL RESULTS
xylene
Max. Pred Cw
Allowable Cw
Allowable #/day
10.8
88.5
0.0
RESULTS
Std Dev.
Mean
C.V.
Number
of data points
HITS
Mult Factor =
Max. Value
Max. Pred Cw
Allowable Cw
0.9978
1.3
0.7602
8
None
4.33
2.5 µg/1
10.8 µg/1
88.5 µg/1
Parameter =
Standard =
xylene
88 5
Date n < Actual Data BDL=1/2DL
Oct-98 1 < 1.0 0.5
Aug-98 2 < 1.0 0.5
Oct-99 3 < 5.0 2.5
Sep-99 4 < 1.0 0.5
Apr-00 5 < 5.0 2.5
Feb-00 6 < 1.0 0.5
Mar-01 7 < 5.0 2.5
Apr-99 8 < 2.0 1.0
µg/1

ramoN
Facility Name =
NPDES # =
Qw (MGD) =
7Q10s (cfs)=
IWC (%) =
EXXON CO, USA -- GREENSBORO
NC0000795
1.05
0
100.00
FINAL RESULTS
Phenol
Max. Pred Cw
Allowable Cw
38.0
0.0
RESULTS
Std Dev.
Mean
C.V.
Number
of data points
HITS
Mult Factor =
Max. Value
Max. Pred Cw
Allowable Cw
5.5470
23.5
0.2364
13
none @ 50ug/L
1.52
25.0 µg/1
38.0 µg/1
2.37 µg/1
Parameter =
Standard =
Phenol
2.37
Date n < Actual Data BDL=1/2DL
Jan-98 1 < 50 25
Feb-98 2 < 10 5
Apr-98 3 < 50 25
May-98 4 < 50 25
Aug-98 5 < 50 25
Oct-98 6 < 50 25
Jan-99 7 < 50 25
Apr-99 8 < 50 25
Jul-99 9 < 50 25
Sep-99 10 < 50 25
Oct-99 11 < 50 25
Feb-00 12 < 50 25
Apr-00 13 < 50 25
ILO
"reasonable potential" dictated by inappropriate PQL
Add note to cover letter.

Facility Name =
NPDES # =
Qw (MGD) =
7Q10s (cfs)=
1WC (%) =
EXXON CO, USA -- GREENSBOR O
NC0000795
1.05
0
100.00
FINAL RESULTS
Oil & Grease
Max. Pred Cw
Allowable Cw
8315.5
30.0
RESULTS
Std Dev.
Mean
C.V.
Number
of data points
HITS
Mult Factor =
Max. Value
Max. Pred Cw
Allowable Cw
484.7019
542.3
0.8938
13
1
3.96
2100.0 µg/1
8315.5 µg/1
30.0 mg/L I
Parameter =
Standard =
µg/1
Oil & Grease
30.0
Date n < Actual Data BDL=1/2DL
Jan-98 1 < 1000 500
Feb-98 2 < 1000 500
Apr-98 3 < 1000 500
May-98 4 < 1000 500
Aug-98 5 < 1000 500
Oct-98 6 < 1000 500
Jan-99 7 < 800 400
Apr-99 8 < 800 400
Jul-99 9 < 100 50
Sep-99 10 < 800 400
Oct-99 11 < 600 300
Feb-00 12 2100 2100
Apr-00 13 < 800 400
no "reasonable potential"

Exxon Mobil Corporation
3225 Gallows Road
Fairfax, Virginia 22037
E(onMobil
August 24, 2001
VIA OVERNIGHT MAIL
North Carolina Department of Environment and Natural Resources
Division of Environmental Management
NPDES Unit
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
Re: Exxon Company, Inc.
ExxonMobil Greensboro Terminal
NPDES Permit No. NC 0000795
Permit Transfer
Dear Sir or Madam:
- WATER QUALITY
POINT SOURCE BRANCH
Exxon Mobil Corporation, also known as Exxon Company, Inc. ("ExxonMobil"),
currently owns and operates the terminal located at 6907 West Market Street, Greensboro,
North Carolina (the "Facility"); and holds National Pollutant Discharge Elimination
System ("NPDES") Permit No. NC 0000795 issued by the North Carolina Department of
Environment and Natural Resources. This letter is to inform you that effective October 1,
2001, ExxonMobil will lease the Facility to its subsidiary, ExxonMobil Oil Corporation
("EMOC").

Accordingly, this is a request to transfer NPDES Permit No. NC0000795 to EMOC
as the operator of the Facility, effective October 1, 2001. We anticipate no changes in the
immediate future to discharges from the Facility and are not requesting any change in
permit terms or conditions. A completed North Carolina Department of Environment and
Natural Resources "Permit Name/Ownership Change Form" and a check for $100 are also
included. The Facility address will continue to serve as the address for permit -related
correspondence. The Facility's Supervisor, Jim Hesser, will continue to be the primary
contact person with respect to this permit.
Please contact Daphne Trotter of McDermott, Will & Emery, 600 13th Street,
N.W., Washington, D.C. 20005, telephone [phone] as soon as possible if you have
any questions, need additional information, or are aware of any reason why the transfer
may not be effective October 1.
Thank you for your assistance.
Very truly yours,
. S. Simon
Vice President
Exxon Mobil Corporation

r
State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
James B. Hunt, Jr., Governor
Bill Holman, Secretary
Kerr T. Stevens, Director
AC;741i
NCDENR
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
PERMIT NAME/OWNERSHIP CHANGE FORM
I. CURRENT PERMIT INFORMATION:
Permit Number: NC00 0 / 0 / 7 / 9 / 5
1. Permit holder's name: Exxon Mobil Corporation, also known as Exxon Company, U.S.A.
2. Permit's signing official's name and title: J. S. Simon
(Person legally responsible for permit)
Vice President, Exxon Mobil Corporation
(Title)
3. Mailing address: 6907 West Market Street City: Greensboro
State: NC Zip Code: 27409 Phone: ( 336) 855-4461
E-mail address:
II. NEW OWNER/NAME INFORMATION:
1. This request for a name change is a result of:
a. Change in ownership of property/company
b. Name change only
Xc. Other (please explain): Lease facility to subsidiary
2. New owner's name (name to be put on permit):
ExxonMobil Oil Corporation
3. New owner's or signing official's name and title: Harold Cramer
(Person legally responsible for permit)
Vice President, ExxonMobil Oil Corporation
(Title)
4. Mailing address: 6907 West Market Street City: Greensboro
State: NC Zip Code: 27409 Phone: ( 336) 855-4461
E-mail address:
1617 Mail Service Center, Raleigh, North Carolina 27699-1617
An Equal Opportunity Affirmative Action Employer
Telephone [phone] FAX [phone]
50% recycled / 10% post -consumer paper

PERMIT NAME / OWNERSHIP CHANGE FORM
THIS APPLICATION PACKAGE WILL NOT BE ACCEPTED BY THE DIVISION OF WATER QUALITY UNLESS
ALL OF THE APPLICABLE ITEMS LISTED BELOW ARE INCLUDED WITH THE SUBMITTAL.
REQUIRED ITEMS:
1. This completed application form
2. Legal documentation of the transfer of ownership (such as a contract, deed, articles of
incorporation)
For changes of ownership, this form must be completed and signed by both the current permit
holder and the new owner of the facility.
For name change only, the current permit holder must complete and sign the Applicant's
Certification.
Current Permittee's Certification:
I, J. S. Simon , attest that this application for
name/ownership change has been reviewed and is accurate and complete to the best of my
knowledge. I understand that if all required parts of this application are not completed and that
if all required supporting information and attachments are not included, this application
package will be returned as incomplete.
Signature: Date: 8/24/2001
Applicant's Certification:
I, Harold Cramer , attest that this application for a
name/ownership change has been reviewed and is accurate and complete to the best of my
knowledge. I understand that if all required parts of this application are not completed and that
if all required supporting information and attachments are not included, this application
package will be returned as incomplete.
Signature: --`— Date: 8/24/2001
THE COMPLETED APPLICATION PACKAGE, INCLUDING ALL SUPPORTING
INFORMATION & MATERIALS, SHOULD BE SENT TO THE FOLLOWING ADDDRESS:
NC DENR / DWQ
NPDES Unit
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
Version 9-99