NC0000795_Wasteload Allocation_19910405

NPDES DOCUMENT !;CANNING COVER !MEET
NC0000795
NPDES Permit:
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:
April 5, 1991
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NPDES WASTE LOAD ALLOCATION
PERMIT NO.: NC0000795
PERMITTEE NAME: Exxon Company, USA / Greensboro
Facility Status: Existing
Permit Status: Renewal
Major Minor
Pipe No.: 001
sign Capacity: * MGD
Domestic (% of Flow): 0 %
Industrial (% of Flow): 100 %
Comments:
*oil -water separators for stormwater, approximately .100 MGD
RECEIVING STREAM:
Class: WS-III
an unnamed tributary to East Fork Deep River
Sub -Basin: 03-06-08
Reference USGS Quad: C 19 SW (please attach)
)ounty: Guilford
Regional Office: Winston-Salem Regional Office
Previous Exp. Date: 7/31/90 Treatment Plant Class: Class 1
Classification changes within three miles:
PLOTTED
Requested by: Rosanne Barona Date: 3/21/91
Prepared by: Date: ,1 3
Reviewed by: a /W I� Seadt, Date: f t4
Modeler
Date Rec.
#
tr 0k?
-*2-k 1
(014 (a
Drainage Area (mil )
Avg. Streamflow (cfs):
7Q10 (cfs) 0 Winter 7Q 10 (cfs)
0 30Q2 (cfs) v
Toxicity Limits: IWChronic
Instream Monitoring: sodtc.
Parameters
Upstream Location
Downstream Location
RECOMMENDED EFFLUENT LIMITS
Mo. Avg. Daily Max. Min/Max Mon. Freq.
Wasteflow (MGD): monitor (see below)
Oil and Grease (mg/1): 30 60 2/month
Settleable Solids (m1/1): 0.1 0.2 2/month
pH (su): 6-9 2/month
Turbidity (NTU): 50 2/month
Phenols (lbs/day): 0.001 2/month
Toxicity Testing Req.: acute monitoring for episodic events
COMMENTS
The following products are stored: petroleum products.
No other products are to be stored without modification of this permit.
All volumes of wastewater leaving the facility must be monitored. If
continuous monitoring is not feasible, then discharger shall record the
approximate times that discharge began and ended, along with the
instantaneous flow at the time of effluent sampling.
Monitor for benzene, toluene, ethylbenzene, and xylenes using an EPA approved
method to a detection level of 1 ug/1. Also monitor for the following
compounds using an EPA approved method: EDB (dibromoethane), MTBE (methyl
tert-butyl ether), 1,2 dichloroethane, napthalene, isoproply ether and lead.
Monitoring and toxicity testing should be ddone on the same schedule.
Monitoring and toxicity samples should be taken within 24 hours of the
beginning of discharge. A reopener clause should be placed in the permit to
allow for limits to be placed on toxicants should the facility's whole
effluent toxicity monitoring indicate unacceptable toxic effecta.
Comments:
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Request No. 6146
Facility Name
NPDES No.
Type of Waste
Facility Status
Permit Status
FACT SHEET FOR WASTELOAD ALLOCATIONS
:Exxon Co. - Greensboro
:NC0000795
:Tank Farm Runoff
:Existing
:Renewal
Receiving Stream :UT to East Fork Deep River
Stream Classification:WS-III
Subbasin
County
Regional Office
Requester
Date of Request
Topo Quad
:03-06-08
:Guilford
:Winston-Salem
:Rosanne Barona
:3/21/91
:C19SW
Wasteload Allocation Summary
RECEIVED
N.C. Dept. NRCD
APR 1 1991
Winston-Salem
Regional Office
Stream Characteristics:
USGS # Date
Drainage Area: 0.0 sq.mi.
Summer 7Q10: 0.0 cfs
Winter 7Q10: 0.0 cfs
Average Flow: 0.0 cfs
30Q2: 0.0 cfs
Stormwater runoff from a gasoline tank farm. Treatment at each outfall is
by oil/water separator. Discharge is to a drainage channel to a storm
drain which drains to E. Fork Deep River. Standard permit limits for
petroleum storage apply. Since the discharge is to a water supply, a
phenols limit of 0.001 lbs/day is required of the facility.
ADDITIONAL REVIEWER COMMENTS:
WASTELOAD SENT TO EPA?(Major) _N_ (Y or N)
(if yes, then attach schematic, toxics spreadsheet, copy of model, or
if not modeled, then old assumptions that were made, and description
of how fits into basinwide plan)
Recommended by:
Reviewed by
Instream Assessment:
l�lj" brf tl°�i Regional Supervisor:
`^� Permits & Engineering:
RETURN TO TECHNICAL SERVICES BY:
APR 26 1991
Date: 3 /a / 4J
/
Date
Date:
-!2 hI 1(
Date: 1/3/17
f?ECEIVED
APR ;s 1991
PFRM!TS & ENGINEERING

Existing Limits:
�2- Request No. 6146
CONVENTIONAL PARAMETERS
Monthly Daily Monitoring
Average Maximum Frequency
Wasteflow (MGD) :
pH (SU) :
Oil & Grease (mg/1) :
Phenols (lbs/day):
Recommended Limits:
monitor
10
(see below)
6-1 2/month
15 2/month
0.0011 2/month
Monthly Daily Monitoring
Average Maximum Frequency
Wasteflow (MGD): monitor (see below)
Settleable Solids (ml/1): 0.1 0.2 2/month
pH (SU) : 6-9 2/month
Oil & Grease (mg/1): 30 60 2/month
Turbidity (NTU):e (see comment)
Phenols (lbs /day) : 0.001
2/month Cy�j a)
The discharge shall not caus the turbidity, of the receiving water to
exceed 50 NTU. is 4. #v4b:11eti of IL ctiuiJ.1 t criers exu..11 5b A/v n•:16.1aalj
a:s.h..gc ow& co,.1Lt , 4 ►ALt'eQse sn Au, i-vrb,d.:41,
TOXICS
Toxicity Limit: Acute Monitoring for Episodic Events
SPECIAL INSTRUCTIONS OR CONDITIONS
The following products are stored: petroleum products
No other products are to be stored without modification of this permit.
All volumes of wastewater leaving the facility must be monitored. If
continuous monitoring is not feasible, then the discharger shall record the
approximate times that the discharge began and ended, along with the
instantaneous flow at the time of the effluent sampling.
During the first five discharge events and then annually, monitor for
benzene, toluene, ethyl benzene, and xylenes using an EPA approved method
to a detection level of 1 ug/1. Also monitor for the following compounds
using an EPA approved method: MTBE, EDB, 1,2, dichloroethane, napthalene,
isopropyl ether, and lead.
SCHEDULE REQUIREMENTS:
Monitoring and toxicity testing should be done on the same schedule (first
five discharge events and then annually). Monitoring and toxicity samples
should be taken within 24 hours of the beginning of the discharge. A
reopener clause should be placed in the permit to allow for limits to be
placed on toxicants should the facility's whole effluent toxicity
monitoring indicate toxic effects.

' •
11/89
Facility Name fAeoN aree4ssdry Permit # NCO0007Q5
ACUTE TOXICITY TESTING REQUIREMENT
Fathead Minnow 24 hr - Monitoring (Annual) for Episodic Events
The permittee shall conduct FIVE acute toxicity tests using protocols defined as definitive in
E.P.A. Document 600/4-85/013 entitled "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, using effluent collected as a single grab sample. Effluent samples
for self -monitoring purposes must be obtained below all waste treatment. Sampling and
subsequent testing will occur during the first five discrete discharge events after the effective date
.of this permit. After monitoring of the first five toxicity tests; the permittee will conduct one test .
annually,: with the annual period beginning in January of the next calendar year. The annual test
requirement-mustbe:erformed.and reported by June 30. If no discharge occurs by June 30,
notification wc►il1 madeto•the Division by this date. Toxicity testing will be performed on the
next discharge test r the:annual`test mgpirement.
.... The parameterrcode or`this test is TAE6C.. All,:toxicity_testing results required as part of this
•permit condition be•entered on the.Effluent Discharge Form (Mk-1) for the month in.which it
pe edAiti a appropriate:. parameter code. Additionally, DEM Form AT-1 (original) is
.,was dorm �h
to. besent to the address:
address:
Attention: Environmental Sciences Branch
North Carolina Division of
Environmental Management
P.O. Box 27687
Raleigh, N.C. 27611
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 any test data from either these monitoring requirements ortests performed by the North
Carolina Division of Environmental Management indicate potential impacts to the receiving st tam,
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.
Failure to submit suitable test results will constitute noncompliance with monitoring requirements.
7Q10 0 cfs
Permitted Flow n a MGD
IWC% hM
Basin & Sub -Basin o a r
Receiving Stream ur ,Eas4- dark ° Rt„f
County Guy I `ord Date L/ 37.1-4/9 /
**Acute Toxicity(Fathead Minnow 24 hr) Monitoring, EPISODIC, See Part , Condition .
Recommended by:

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cc: Permits and Engineering (NPDES) Rirr:WFD
Technical Support -
Guilford County Emergency Management MAii 1 2 1990
Guilford County Planning and Dev. Dept.
Central Files TECHNICAL suer-witsuvr-wit BRANCH
WSRO
Date M Irch 8, 1990
Page if 4
NPDES STAFF REPORT AND RECOMMENDATIONS
County Guilford
NPDES Permit No. NC0000795
PART I - GENERAL INFORMATION
1. Facility and Address:
Exxon Company, U.S.A., Greensboro Terminal, 6907 W.
Market Street, Greensboro, North Carolina (P. O. Box
18363, 27419). Mailing Address: J. F. Marcogliese,
Distribution Manager, Exxon Company, U.S.A., P. O. Box
4415, Houston, Texas 77210-4415
2. Date of Investigation: March 5, 1990
3. Report Prepared by: Arthur R. Hagstrom, Environmental
Engineer, DEM, WSRO, WQ
4. Persons Contacted and Telephone Number:
Mr. A. D. Auten, Terminal Superintendent, Greensboro
Terminal Telephone [phone]
5. Directions to Site:
From the Junction of I-40 and Chimney Rock Road, go
north on Chimney Rock Road, then left of West Market
Street to the terminal.
6. Discharge Point - Latitude: 36° 04' 34" Flows above
ground fgr approx. 50' +/-
Longitude: 79 55' 42"
Elevation: 895' +/-
Attach a USGS Map Extract and indicated treatment plant
site and discharge point on map.
USGS Quad No. C19SW.or USGS Quad Name Guilford, NC
7. Size (land available for expansion and upgrading):
Over-all site is 28 acres and most of the site is
fenced, paved, graveled, or under tanks, buildings, or
structures.

Page 2 of 4
NC0000795
March 8, 1990
8. Topography (relationship to flood plain included):
The over-all site slopes to the South (2 to 4%) from
the railroad and to the North from the railroad. There
is a large paved fueling, parking, and vehicle storage
area; large dikes around tanks. There is a man-made
pond on the site. The site is not in a flood plain.
9. Location of nearest dwelling:
Over 1000 feet. Existing and new commercial
construction is somewhat closer.
10. Receiving stream or affected surface waters: The
receiving pipe is located approx. 50 feet from the
discharge pipe. The discharge goes under another
terminal's graveled site.
a. Classification:
b. River Basin and Subbasin No.: Cape Fear, 03-06-08
c. Describe receiving stream features and pertinent
downstream uses: Up to now the storm water and
oil/water discharges flow into an adjacent
Company's storm drainage system and then surface
300'+/- South into an open drainage (wet weather)
ditch. It then goes under Burnt Poplar Road and
South to Colonial Pipeline's Ponds and to an U.T.
to East Fork of Deep River. The land between the
Amarada Hess terminal and I-40 is now undergoing
major development and most drainage from several
terminals will soon be enclosed in storm drains to
I-40.
PART II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
1. Type of wastewater: 0% Domestic
100% Industrial, and surface
run-off
a. Volume of Wastewater: <.100 +/- MGD. The flow is
from the treatment areas, oil/water separators and
faultative/separatory/measuring lake.
b. Types and quantities of industrial wastewater:
Low quantities of contaminants (unknown)
c. Prevalent toxic constituents in wastewater:
Gasoline and oil derivities (unknown)

Page 3 of 4
NC0000795
March 8, 1990
d. Pretreatment Program (POTWs only): N/A
in development
should be required
approved
not needed
2. Production rates (industrial discharges only) in
pounds: N/A
a. highest month in the last 12 months
b. highest year in last 5 years
3. Description of industrial process (for industries only)
and applicable CFR Part and Subpart: N/A
4. Type of treatment (specify whether proposed or
existing):
Existing. Collection system (spills and storm),
oil/water separators, multiple oil tank diked storage),
a small diked containment pond with oil/water separator
system, a multiple pump discharge system with flow
meter (measure and record), a discharge pipe (on
adjacent land) and a discharge channel of approx. 50'
+/- to an underground discharge pipe.
5. Sludge handling and disposal scheme:
a. Water bottoms are stored in a separate small tank
and disposal is contracted.
b. Heavy tank bottoms are placed in drums and stored
on site for pick up.
c. Disposal contractors are used, and disposal
includes appropriate documents
6. Treatment plant classification: Grade I
Flow 3; Flow measurement and recording, 2; Oil/Grease
2; and Holding Pond (SD) 5 = 12
7. SIC Code(s) 5171
Wastewater Code(s) 37 39
PART III - OTHER PERTINENT INFORMATION
1. Is this facility being constructed with Construction
Grants Funds (municipals only)? No
2. Special monitoring requests: No upstream

Page 4 of 4
NC0000795
March 8, 1990
3. Additional effluent limits requests: Normal
requirements for oil terminals discharging to WS
waters.
4. -Other: This terminal has ceased using any steam
vehicle cleaners and they no longer wash their
trucks/tanker trailers on site. These are contracted
off site. They have put in bottom loading units for
filling truck tankers. They have put in flow
measurement. They are now adjusting flows to meet
phenol levels. They have the only metered discharge
system at the Greensboro Tank Farm.
PART IV - EVALUATION AND RECOMMENDATIONS
The WSRO recommends that Exxon's Permit be re -issued
and that it includes current monitoring and that:
1. The GWQ Section has no problems with the site and
the holding pond.
2. The Division of Health Services should be allowed
to comment on this existing discharge.
L)l. An.
Signature of rep
preparer
Water Qual ty Supervisor

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