NC0046531_Staff Report_19960315

Mcuufl McCall&
SOC PRIORITY PROJECT: Yes No X
To: Permits and Engineering Unit
Water Quality Section
Attention: Mark McIntire
Date: March 15, 1996
NPDES STAFF REPORT AND RECOMMENDATION
County: Mecklenburg
MRO No. 96-48
Permit No. NC0046531
PART I - GENERAL INFORMATION
1. Facility and Address: Crown Central Charlotte Terminal
Crown Central Petroleum Corporation
One North Charles Street
P.O. Box 1168
Baltimore, Maryland 21203
2. Date of Investigation: 03-12-96
3. Report Prepared By: Samar Bou-Ghazale, Env. Engineer I
4. Persons Contacted and Telephone Number: Mr. Floyd Reid,
Terminal Manager; tel# [phone]
5. Directions to Site: Travel Highway 27 north from Charlotte to
the community of Paw Creek. The Crown Central Terminal is
located at the junction of Highway 27 (Mt. Holly Road) and Tom
Sadler Road (SR 1784).
6. Discharge Point(s). List for all discharge points:
Latitude: 35° 16' rSg�� Longitude: 80° 56' 09"
Attach a U.S.G.S. map extract and indicate treatment facility
site and discharge point on map.
USGS Quad No.: F 15 SW USGS Quad Name: Mountain Island
Lake
7. Site size and expansion are consistent with application?
Yes X No If No, explain:
8. Topography (relationship to flood plain included): Sloping at
the rate of 1 to 2%. The site is not located in a flood plain.

9. Location of nearest dwelling: The nearest dwelling is
approximately 1000 feet from the site.
10. Receiving stream or affected surface waters: Unnamed
Tributary to Gum Branch.
a. Classification: C
b. River Basin and Subbasin No.: Catawba; 03-08-34
c. Describe receiving stream features and pertinent
downstream uses: The receiving stream is a wet weather
ditch. General "C" classification uses downstream. One
water supply intake is located on Lake Wylie. Citgo
Charlotte Terminal is also discharging into the same UT
to Gum Branch.
PART II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
1. a. Volume of wastewater to be permitted: The groundwater
treatment system is limited to 0.0432 MGD (Ultimate
Design Capacity). The stormwater flow is not limited.
b. What is the current permitted capacity of the wastewater
treatment facility? N/A.
c. Actual treatment capacity of the current facility
(current design capacity)? N/A.
d. Date(s) and construction activities allowed by previous
Authorizations to Construct issued in the previous two
years: An Authorization to Construct was issued on
February 17, 1995 for the construction of a groundwater
treatment system consisting of an oil/water separator,
air stripper, pre -filtration, and carbon filters.
e. Please provide a description of existing or substantially
constructed wastewater treatment facilities: The
existing treatment facilities consist of a containment
area and an oil/water separator at the loading dock. The
groundwater remediation facilities consists of an
equalization tank, oil/water separator, air stripper, and
carbon adsorption.
f. Please provide a description of proposed wastewater
treatment facilities: N/A
g•
Possible toxic impacts to surface waters: Discharges of
this nature have been shown to be toxic.
NPDES Permit Staff Report
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h. Pretreatment Program (POTWs only): N/A.
•
2. Residuals handling and utilization/disposal scheme: Generation
of residuals is not expected.
3. Treatment plant classification (attach completed rating
sheet): Proposed, no rating given.
4. SIC Code(s): 5171
Primary: 39,. 66 Secondary: 73
Main Treatment Unit Code: 56000
PART III - OTHER PERTINENT INFORMATION
1. Is this facility being constructed with Construction Grant
Funds or are any public monies involved (municipals only)?
N/A.
2. Special monitoring or limitations (including toxicity)
requests: Toxicity may need to be limited/monitored due to
the suspected toxic nature of the discharge.
3. Important SOC, JOC or Compliance Schedule dates: (please
indicate) N/A.
4. Alternative Analysis Evaluation: Has the facility evaluated
all of the non -discharge options available. Please provide
regional perspective for each option evaluated.
Spray irrigation: N/A
Connection to regional Sewer System: There is no sewer main
near the site and connection to a regional sewer is not an
option.
Discharge to an infiltration gallery: N/A
5. Air Quality and/or Groundwater concerns or hazardous waste
utilized at this facility that may impact water quality, air
quality or groundwater? Contaminated groundwater already
exists at the site. No hazardous materials concern. Air
quality permit for this site may be required by Mecklenburg
County.
PART IV - EVALUATION AND RECOMMENDATIONS
NPDES Permit Staff Report
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Crown Central Petroleum Corporation, is requesting NPDES
Permit renewal for discharge of treated groundwater and stormwater
at subject facility.
Recovered groundwater as well as storm runoff and washwater
from the loading rack is pumped into an above ground equalization
tank via an oil/water separator. The combined waste stream will
then be treated through an air stripper and carbon adsorption.
Stormwater collected in the diked tank farm will also be discharged
(without treatment) via the same discharge outfall.
According to Mr. Floyd Reid, Terminal Manager, the tank bottom
water is pumped and hauled by Four Seasons Environmental.
It is recommended that the NPDES Permit be renewed once the
above mentioned concerns regarding toxicity have been addressed,
and comments from GW Section have been received.
ort Preparer
1
Water Quality 1 gional Supervisor
NPDES Permit Staff Report
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