NC0004839_Wasteload Allocation_19930512

NPDE:i DOCUMENT SCANNING COVER SHEET
NPDES Permit:
NC0004839
Document Type:
Permit Issuance
r
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Speculative Limits
Correspondence
Instream Assessment (67B)
Environmental Assessment (EA)
Permit
History
Document Date:
May 12, 1993
This doeument is printed on relauece paper - igriore any
conterit on the reYeriae wide

DIVISION OF ENVIRONMENTAL MANAGEMENT
May 12, 1993
MEMORANDUM
TO: Randy Kepler
THRU: Ruth Swanek
FROM: Jacquelyn M. Nowe11 4
SUBJECT: Exxon Co.- Charlotte Marketing Terminal
NPDES Permit No. NC0004839
Mecklenburg County
Per our conversation this morning, the following modifications have been made to
the wasteload for the subject facility. The facility now has two separate outfalls: 001 for
the stormwater discharge and 002 for the groundwater remediation. The most recent
wasteload allocation completed on 12/1/92 had only one outfall with both discharges
combined. You indicated that in recent correspondence with Exxon, they had requested
only one outfall. The limits for the two outfalls are as follows:
Outfall 001 - Stormwater
Qw = Variable
Oil & Grease = 45 mg/1
TSS = 45 mg/1
Turbidity = 50 NTU
pH = 6-9 SU
Acute Toxicity Monitoring for Episodic Events*
(see attached)
Outfall 002 - Groundwater Remediation
Qw = 0.057 MGD
Benzene = 71.4 ug/1
Toluene = 11 ug/1
MTBE = monitor
Ethylbenzene = 325 ug/1
Xylene = monitor
Chloroform = monitor
1,2 Dichloroethane = 98.6 ug/1
(Please note that the WLA (12/92) had a limit for 1,2 Dichlorobenzene. This was a
typographical error and should have been dichloroethane.)
Ifjthere any questions on this matter, please call me.
Attachment
cc: Rex Gleason
INLA File

Facility Name Exxon Co. -Charlotte Marketing Terminal Permit # NC0004839 Pipe # 001
ACUTE TOXICITY MONITORING (EPISODIC)
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 Org 'sms." The monitoring shall be performed as a Fathead Minnow (Pimephales
promelas) 24 hourstatic 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 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, DEM Form AT-1 (original) is
to be sent to the following address:
Attention: Environmental Sciences Branch
North Carolina Division of
Environmental Management
4401 Reedy Creek Rd.
Raleigh, N.C. 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 any test data from either these monitoring requirements or tests performed by the North
Carolina Division of Environmental Management 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.
Failure to submit suitable test results will constitute noncompliance with monitoring requirements.
7Q10 0 cfs
Permitted Flovci Variable_ MGD
IWC 100 %
Basin & Sub -*in 030834
Receiving Stream UT Long Creek
County Mecklenburg
EAM Fathead 24 Version 10/91

NPDES WAS 1'h LOAD ALLOCATION
RECEIVING STREAM: an unnamed tributary to Long Creek
Class: C
PERMIT NO.: NC0004839
PERMITTEE NAME:
FACILITY NAME:
Exxon Company, U. S. A.
Charlotte Marketing Terminal
Facility Status: Existing
Permit Status: Renewal with Modification
Major Minor
Pipe No.: 001
Design Capacity: var MGD
Domestic (% of Flow): 0 %
Industrial (% of Flow): 100 %
Comments:
WLA was done for the groundwater remediation at this facility. This
discharge also includes stormwater. Both the stormwater and the GW
Remediation are being discharged from one outfall 001. Facility is oil
storage of greater than one million gallons. need limits for both in one a,►F
001
Sub -Basin: 03-08-34
Reference USGS Quad: F 15 SW
County: Mecklenburg
Regional Office: Mooresville Regional Office
Previous Exp. Date: 5/31/90 Treatment Plant Class:
Classification changes within three miles:
no change within three miles.
Requested by: Randy Kepleia-K
Prepared by: A(�jj
Reviewed b� ("aL'Ll.a- G t/
y C�L ytC,Vd-eY 1
(please attach)
Modeler
Date Rec.
#
CrAtiti
F3//779z-
7073
Drainage Area (mi2 ) o, o / Avg. Streamflow (cfs): a. a
7Q10 (cfs) 0-6 Winter 7Q10 (cfs) 0. ° 30Q2 (cfs) 6. o
Toxicity Limits: TWC 90 % Acut hronic
Instream Monitoring:
Parameters
Upstream Location
Downstream Location
Recommended Limits
Mon. Avg.
Flow (MGD):
Benzene (µg/1):
Toluene (µg/1):
MTBE (µg/1):
Ethylbenzene (µg/1):
Xylene (µg/1):
Oil & Grease (mg/1):
TSS (mg/1):
Turbidity (NTU):
pH (SU):
Daily Max.
Variable
71.4
11
monitor
325
monitor
45
45
50
6-9
Frequency
Weekly
Monthly
Monthly
Monthly
Monthly
Monthly
2/Month
2/Month
2/Month
2/Month
WQ/EL
WQWBPJ
WQ
WQ
Special Instructions or Conditions
Facility should have a whole -effluent toxicity testing requirement for chronic pass/fail @ 90%
-Permit must contain flow monitoirng requirement such that all volumes of wastewater leaving the faciliot
are monitoring. ,i1
- BTEX parameters should be monitored using an EPA -approved method to a detection level of 1 ppb (µ0/�y
- Minimum treatment will include oil/water separator, air stripping or diffused aeration and activated carbc
adsorption. Design and construction of the waste treatment facility will emphasize the use of plastic pipe
and fittings where practically possible.
Comments:

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ROAD
PRIMARY HIGHWAY
HARD SURFACE
LASSIFICATION
SECONDARY HIGHWAY
HARD SURFACE UNIMPROVED ROAD = _ _
LIGHT -DUTY ROAD. HARD OR
IMPROVED SURFACE
Latitude 35°16'40"
Longitude 80°56'27"
Map # F15SW
Sub -basin 030834 •
Stream Class
WS-IV 11-120-(2.5) 8/3/96
Discharge Class
Receiving Stream
Design Q 0.057 MGD
100% Industrial
. Paw Creek/Catawba River
Permit expires 8/31/01
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SCALE 1:24 000
0
- 1 MILE
--------------
0 7000 FEET
1 KILOMETER
1
0
R•` [—
CONTOUR INTERVAL 10 FEET
Exxon/Charlotte Terminal
NC0004839
Mecklenburg County
Fuel Terminal Facility

Facility Name:
NPDES No.:
Type of Waste:
Facility Status:
Permit Status:
Receiving Stream:
Stream Classification:
Subbasin:
County:
Regional Office:
Requestor:
Date of Request:
Topo Quad:
NC0004839
Industrial - 100%
Existing
Renewal with Modification
UT Long Creek
C
030834
Mecklenburg
Mooresville i,JA+
Kepler
8/17/92
F15SW
Stream Characteristic:
USGS #
Date:
Drainage Area (mi2):
Summer 7Q10 (cfs):
Winter 7Q10 (cfs):
Average Flow (cfs):
30Q2 (cfs):
IWC (%):
FACT SHEET FOR WASTELOAD ALLOCATION
Request # 7073
Exxon Company, USA - Charlotte Marketing Terminal N. C. DEPT. of NATUR 41
RESOURCES AND
COMMUNITY DEVELOPME\
OCT 2 6 1992
DIVISION OF ENVIRONMENTAL MANAGEMENT
YUORESVILLE REGIONAL OFFICE
0.01
0.0
0.0
0.0
0.0
100
Wasteload Allocation Summary
(approach taken, correspondence with region, EPA, etc.)
Facility requesting renewal of NPDES permit w/ modification. Outfall 001 will be discharging
both groundwater remediation and stormwater. Facility will have oil storage of greater than one
million gallons. Chronic toxicity pass/fail permit limit @ 90% should be included in the permit.
Special Schedule Requirements and additional comments from Reviewers:
Recommended by:
Reviewed by
Instream Assessment:
Regional Supervisor:
Permits & Engineering:
(111-61k--
Date: 10/15/92_
T Tit)
RETURN TO TECHNICAL SERVICES BY:
Date: I0/ /(0 /
Date: 1 l 141a a —
Date: /l //2
NOV 1 7 1992

TOXICS/CONVENTIONAL PARAMETERS
Recommended Limits
Mon. Avg. Daily Max. Frequency WW1,
Flow (MGD): Variable Weekly
Benzene (µg/1): 71.4 Monthly WQ
Toluene (jg/1): 11 Monthly WQ
MTBE (µg/1): monitor Monthly
Ethylbenzne (µg/1): 325 Monthly BPJ
Xylene (µg/1): monitor Monthly
Oil & Grease (mg/1): 45 2/Month
TSS (mg/1: 45 2/Month
Turbidity (NTU): 50 2/Month WQ
pH (SU): 6-9 2/Month WQ
bXiCi4_0 - 6eea44r checl
_X_ Parameter(s) are water quality limited. For some parameters, the available load capacity of
the immediate receiving water will be consumed. This may affect future water quality based
effluent limitations for additional dischargers within this portion of the watershed.
OR
No parameters are water quality limited, but this discharge may affect future allocations.
MISCELLANEOUS LANEOUS INFORMATION & SPECIAL CONDITIONS
Special Instructions or Conditions
-Facility should have a whole -effluent toxicity testing requirement for chronic pass/fail @ 90%
-Permit must contain flow monitoirng requirement such that all volumes of wastewater leaving the facilii
are monitoring.
-BTEX parameters should be monitored using an EPA -approved method to a detection level of 1 ppb (µ 0
-Minimum treatment will include oil./water separator, air stripping or diffused aeration and activated carbc
adsorption. Design and construction of the waste treatment facility will emphasize the use of plastic pipe
and fittings where practically possible.
Wasteload ent to EPA? (Major) (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 it fits into basinwide plan)
Additional rformation attached? (Y or N) If yes, explain with attachments.

v`
Facility Name EkX64,
rig -as-ihi
rmit # Nf oao 1/3, Pipe #
CHRONIC TOXICITY PASS/FAIL PERMIT LIMIT (QRTRLY)
The effluent discharge shall at no time exhibit chronic toxicity using test procedures outlined in:
1.) The North Carolina Ceriodaphnia chronic effluent bioassay procedure (North Caro • .
Procedure - Revised *September 1989) or subsequent versions. Carolina Chronic Bioassay
The effluent concen ration al which there may be no observable inhibition of roduction or significant
is � % (defined as treatment two in the North Carolina � mortality
procedure document). The permit holder shall perform
vane* monitoring using this procedure to establish compliance with the permitcondition
performed cfter thirty days from the effective date of this permit during thetk of
The t test will be
1I it/ hAe 'UL o4r . Effluent sampling for this testing shall be
permitted final effluent discharge below all treatment performed at the NPDES
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, DEM Form AT-1 (original) is to be sent to the following address:
Attention: Environmental Sciences Branch
North Carolina Division of
Environmental Management
4401 Reedy Creek Road
Raleigh, N.C. 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 dosefnesponse data. Total residual chlorine of the effluent toxici
sample must be measured and reported if chlorine is employed for disinfection of the waste stream. ty
Should
e ouldsingle quarterly monitoring indicate a failure to meet specified limits; then monthly monitoring will
bgin immediatelyuntil such time that a single test is passed. Upon passing, this monthly test requirement will
revert to quarterlin tine months specified above.
�
Should any test data from this monitoring requirement or tests performed by the North Carolina Division of
Environmental Management 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
retesting(within 30 days of initial monitoring event). Failure to submit suitable test results will constitute
noncompliance with m Monitoring requirements.
7Q10 0 cfs
Permitted Flow. vQ- MGD
1WC 1od %
Basin & Sub -basin &rxx 3#
Receiving Stream UT¢Q, f auK
County /Kr t ,1, 1
v
Rec mmended by:
ate i0/ish7-
QCL PIF Version 9/91

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