NC0004839_Wasteload Allocation_19920311

NPDES DOCIMENT SCANNING COVER SHEET
Permit:
NC0004839
NPDES
Document Type:
Permit Issuance
,-.
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Speculative Limits
Correspondence
Instream Assessment
(67B)
Environmental Assessment (EA)
Permit
History
Document Date:
March 11, 1992
Thia document is printed on reuse paper - ignore any
content on the resreriae aide

NPDES WASTE LOAD ALLOCATION
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.: 002
Design Capacity: 0.057 MGD max
Domestic (% of Flow): 0 %
Industrial (% of Flow): 100 %
Comments:
Official application received for groundwater remediation. Included
with this WLA is additional information about project and original
WLA for the groundwater remediation. Please look over and determine
if any changes need to be made. They expect flow range to be between?
15 . C• ei prh c ncl Qb.o c
iNqi
RECEIVING STREAM: an unnamed tributary to Long Creek
Class: C
Sub -Basin: 03-08-34
Reference USGS Quad: F 15 SW (please attach)
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:
Prepared by:
Reviewed
PLOTTED
Randy Kepler Date: 12/13/91
Date: :4l 7 Z.
Date: .31/01C1 a -
Modeler
Date Rec.
#
SMA
17 1-Ekk
4PVo 7.
Drainage Area (m
7Q10 (cfs) 6,
O, O /
Avg. Streamflow (cfs): 61.
Winter 7Q10 (cfs) 0.6 30Q2 (cfs) D,
Toxicity Limits: IWC
Instream Monitoring:
Parameters
% Acute/Chronic
Upstream Location
Downstream Location
Recommended Limits
Wasteflow (MGD):
Benzene (µg/1):
Toluene (14/1):
Ethylbenzene (}tg/1):
MTBE (14/1): om , monitor
1,2-Dichlorobethwie-(41):
Chloroform (14/1): monitor
Monthly Avg
0.057
Daily Max.
71.4
11
325
98.6
Mon. Freq. WQ or EL
weekly
monthly WQ
monthly WQ
monthly WQ
monthly WQ
monthly WQ
monthly WQ
Special Instructions or Conditions
Permit must contain flow monitoring requirement for weekly volumes of wastewater .
Minimum treatment will include air stripping or diffused aeration and Activated Carbon Adsorption.
Design and Construction of the Waste Treatment Facility will emphasize the use of plastic pipes aV
where practically possible.
Comments:
}. #.N SS
wcka-

Table 1
Dissolved Phase Hydrocarbons in Ground Water
Exxon Bulk Distribution Terminal
Charlotte, North Carolina
Analyte
Maximum
Observed
Concentration*
(mg/I)
Location
Date
Benzene
j Toluene
.J Ethylbenzene
Xylenes
Isopropylether (I PE)
MTBE
Chlorobenzene
1,2 Dichlorobenzene
1,4-Dichlorobenzene
Chloroform
1,1-Dichloroethane
1,2-Dichloroethane
Napthalene
2-Methylnapthalene
Acenapthalene
Dibenzofuran
Acenaphthene
Fluorene
Phenanthrene
8.5
15.0
4.2
12.2
4.5
0.017
0.020
0.0014
0,210
0.029
0.052
0.320
0.710(E)**
0.690(E)
0.022(J)* * *
0.021(J)
0.018(J)
0.041(J)
0.062
MW-15
MW-26
TC-1
TC-1
MW-1
MW-7
MW-12
MW-36
MW-36
MW-31
MW-29
MW-1
MW-26
MW-26
MW-26
MW-26
MW-25/35
MW-26
MW-26
8-89
9-89
8-90
8-90
8-90
2-91
3-90
8-90
9-89
8-90
2-91
2-91
12-90
12-90
12-90
12-90
12-90
12-90
12-90
*Through February 1991
* * E = compound exceeded calibration range
* * *J = estimated value
1, 6-ova V-Lawa , = C-(C . -(

TABLE 1-1 SITE CONDITIONS, EXXON BULK DISTRIBUTION TERMINAL, CHARLOTTE,
NORTH CAROLINA
Parameter
Design(a)
Influent (pg/L)
Effluent(b)
Requirement (pg/L)
POTW. NPDES
Benzene 8,500 170
Toluene 15,500 300
Ethylbenzene 4,200 84
Xylene 12,200 244
Iron 5,000
Zinc 50
Other design criteria are as follows:
Flow Range . 15 to 40 gpm
Design Flow . 25 gpm
Design Life.. 5-20 years
(a) Based on worst case analytical data from site monitoring wells.
(b) POTW effluent treatment requirements are per Charlotte-
Meckl nberg Utility Department.
NPDES effluent treatment requirements are per NCDEHNR Division of
Environmental Management, as described in.15A NCAC 2H.0100.
3
4
71
11

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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:
FACT SHEET FOR WASTELOAD ALLOCATION
XX0 /01
Charlotte Marketing Terminal
NC0004839
Industrial - 100%
Existing
Renewal
UT Long Creek
C
030834
Mecklenburg
Mooresvillehz
Kepler
12/17/91
F15SW
Request # 6662
A'. C. DEPT. OF NATURAL
RESOURCES AND
COMMUNITY DEVELOPMENT
FEB 1 01992
IIMSUA IF p11ASIt11EATAl YAWNER
Stream Charactd YiUf 1EtI»NAI IffICE
USGS #
Date:
Drainage Area (mi2) 0.01
Summer 7Q10 (cfs): 0.0
Winter 7Q10 (cfs): 0.0
Average Flow (cfs): 0.0
30Q2 (cfs): 0.0
IWC (%): 100
Wasteload Allocation Summary
(approach taken, correspondence with region, EPA, etc.)
Facility requesting renewal of existing permit with modification of wasteflow from 0.0288 MGD tD
0.057 MGD. Tech Support recommends limits per new SOP guidance for petroleum based
groundwater remediation projects and additional limits per Federal Criteria documentation.
Special Schedule Requirements and additional comments from Reviewers:
Recommended by• Date: 1/29/92
Reviewed by
V l
Instream Assessment: �1. /,1�i Date: e t i('1,
l
Regional Supervisor: Z�--
Permits & Engineering:
J Date: )/0)--I R �--
Date: `67.-
RETURN TO TECHNICAL SERVICES BY: MAR 0 5 1992

3
TOXICS/CONVENTIONAL PARAMETERS
Type of Toxicity Test:
Existing Limit:
Recommended Limit:
Monitoring Schedule:
Existing Limits
Wasteflow (MGD):
Oil & Grease (mg/1):
pH (SU):
Benzene (4/1):
Toluene (4/1):
Ethylbenzene (1g/1):
m/p-Xylene (µg/1):
o-Xylene (µg/1):
Isopropyl Ether (µg/1):
MTBE (µ.g/1):
Napthalene (µg/1):
2-Methylnapthalene (µg/1):
Recommended Limits
Wasteflow (MGD):
Benzene (µg/1):
Toluene (µg/1):
Ethylbenzene (4/1):
-MTBE
1,2-Dichlorobena e
2/93Chloroform (µg/1):
Chronic/Ceriodaphnia/Qi Illy
99%
NO TOXICITY TEST
Mon. Avg. Daily Max.
0.0288
30 60
6-9
71.4
11
325
monitor
monitor
monitor
monitor
monitor
monitor
Monthly Avg Daily Max. Mon. Freq.
0.057 weekly
71.4 monthly
11 monthly
325 monthly
monitor monthly
98.6 monthly
monitor monthly
WQ or EL
WQ
WQ
WQ
WQ
WQ
(See page three for special monitoring requirements.)
Limits Changes Due To: Parameter(s) Affected
Change in 7Q10 data
Change in stream classification
Relocation of discharge
Change in wasteflow
New pretreatment information
Failing toxicity test
Other (onsite toxicity study, interaction, etc.)
Instream data
New regulations/standards/procedures
_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.

3
INSTREAM MONITORING REQUIREMENTS
Upstream Location:
Downstream Location:
Parameters:
Special instream monitoring locations or monitoring frequencies:
MISCELLANEOUS INFORMATION & SPECIAL CONDITIONS
Adequacy ok Existing Treatment
Has the fa lity demonstratedjhe ability to meet the proposed new limits with existing treatment
facilities? es No ✓✓
If n , which parameters cannot be met?
Wo d a "phasing in" of the new limits be appropriate? Yes No ✓
P g
If yes, please provide a schedule (and basis for that schedule) with the regional
office recommendations:
Special Ins
If no, why not?
ci are 4-0 fie, rY, s G (e o rP 4 l,.Q.Sre, iitylAS
a d►e a -e. c, k; .
ctions or Conditions
Permit must contain flow monitoring requirement for weekly volumes of wastewater .
Minimum treatment will include air stripping or diffused aeration and Activated Carbon Adsorption.
Design and Construction of the Waste Treatment Facility will emphasize the use of plastic pipes and fi
where practically possible.
Wasteload sent to EPA? (Major) N (Y or N)
(If yes, the I attach schematic, toxics spreadsheet, copy of model, or, if not modeled, then old
assumption that were made, and description of how it fits into basinwide plan)
Additional Information attached? (Y or N) If yes, explain with attachments.