NC0069841_wasteload allocation_19910912

State of North Carolina
Department of Environment, Health, and Natural Resources
Division of Environmental Management
512 North Salisbury Street • Raleigh, North Carolina 27604
James G. Martin, Governor George T. Everett, Ph.D.
William W. Cobey, Jr., Secretary Director
September 12, 1991
Regional Offices
Ms. Pam Burnett
Asheville
Jordan, Jones & Goulding, Inc.
704/251-6208
2000 Clearview Ave., N.E.
Fayetteville
Atlanta, Georgia 30340
919/486-1541
Dear Ms. Burnett,
Mooresville
This is in response to your letter dated August 7, 1991 regarding wastewater treatment alternatives
704/663-1699
in Union County. As you may know, the Division of Environmental Management models discharges
of oxygen -consuming waste under worst -case hydrologic conditions. This means modeling the stream
Raleigh
at low flows defined by Summer 7Q10 (or S7Q10) and 30Q2 conditions. Summer 7Q10 is defined as
919/733-2314
the minimum average flow during summer for a period of seven consecutive days that has an average
recurrence of once in ten years and 30Q2 is the minimum average flow for 30 consecutive days that
Washington
has a recurrence once every two years.
919/946-6481
Per State of North Carolina Administrative Code Section 15A NCAC 2B.0206(d), no new or
Wilmington
expanding discharges of oxygen -consuming waste will be allowed at sites where S7Q10 and 30Q2
919/395-3900
both equal zero. This section of the Administrative Code also states that for discharges to streams
with zero S7Q10 and greater than zero 30Q2, effluent limits will be determined on a case -by -case
Winston-Salem
basis, but should not be less stringent than BOD5 = 5 mg/l, NH3 = 1 mg/l, and dissolved oxygen =
919/896-7007
6.0 mg/l. (These limits will be referred to as tertiary limits throughout this letter.)
At the Crooked Creek WWTP, both S7Q10 and 30Q2 equal zero. However, further downstream
near Highway 601 (Figure 3 in your letter) both flows are positive. Any new facility located here
may receive tertiary limits because, although S7Q10 is greater than zero, flows in this creek may not
provide sufficient dilution for anything less than highly -treated wastewater. (Please note that final
limits can only be given upon receipt of a permit application and appropriate fees.)
Six Mile Creek has a number of discharges on it including First Providence Country Club which
has led to concerns regarding water quality in the stream. As a result of these concerns, and because
S7Q 10 is zero, any proposed expansion on Six Mile Creek would be further evaluated. Again, tertiary
limits would apply.
Salem Creek and Twelve Mile Creek (Figures 1 and 2 in your letter) have no flow during S7Q10
conditions, but have positive 30Q2 flows, so advanced tertiary limits would apply to any proposed
facility. In addition, any limits for toxic parameters would be as stringent as the appropriate water
quality standards. Toxicity testing would require a pass/fail limit of 90%, meaning compliance would
be based on a water sample which was 9/10 effluent. If chlorination was used as a disinfectant,
dechlorination would be required before discharge.
Pollution Prevention Pays
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone]
An Equal Opportunity Affirmative Action Employer

You also requested the maximum permitted wasteload for Providence Country Club, the City of
Monroe, and the Union County (Crooked Creek) WWTP's. They are:
Facility NPDES Number Permitted Wasteflow
First Providence Country Club NC0058882 1.0 MGD
City of Monroe NC0024333 11.0 MGD*
Crooked Creek WWTP NC0069841 1.3 MGD
*Please note that assimilative capacity in Richardson Creek is exhausted at the City of Monroe
discharge site.
As you can see, typical streamflows in Union County can be high on average, but are low during
S7Q10 conditions. The Division of Environmental Management strongly suggests alternatives to
surface water discharges or consolidation of plants to larger facilities with advanced treatment. Please
call Dave Goodrich at [phone] or me if you have questions regarding this letter or the modeling
process. Please contact Mr. Rex Gleason, Water Quality Supervisor of the Mooresville Regional
Office at [phone], if you have questions regarding future planning for wastewater alternatives in
Union County.
Respectfully,
Ruth C. Swanek, Supervisor
Instream Assessment Unit
xc: Rex Gleason

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TA ATHENNS
COLUMBUS
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Goulding CHARLESTON
INCORPORATED
{=2000 CLEARVIEW AVE., N.E.
cATLANTA, GEORGIA 30340
'RHONE: [phone] ❑ FAX [phone]
a 1991
August 7, 1991
yg't%;p�!81;�r
Ms. Ruth Swanek s
Division of Environmental Management '
Water Quality Section '
P.O. Box 29535
Raleigh, NC 27626-0535
Dear Ms. Swanek,
Jordan, Jones & Goulding has been retained by the City of Monroe and Union
County to perform a Water and Wastewater System Study. The purpose of
this letter is to inquire about discharge permit limits for several of the
existing wastewater treatment plants in Union County.
We would like to know the maximum wasteload allocation for the Crooked
Creek Wastewater Treatment Plant, which discharges into Crooked Creek, and
for the Providence Country Club Wastewater Treatment Plant, which
discharges into Sixmile Creek. We would also like to confirm that the
Monroe Wastewater Treatment Plant's discharge permit can be increased to
11 MGD.
We would also like to inquire about the possibility of obtaining permits
for three new treatment plants on other sites in Union County. The
proposed treatment facilities were first referred by the 201 Facilities
Plan (1976) for Union County and were updated according to current
conditions. The capacities of the proposed facilities are listed below,
and the approximate locations shown in the attached figures.
Proposed Figure showing
Treatment Plant Capacity location
Salem Creek WWTP
Twelvemile Creek WWTP
New site downstream of
Crooked Creek WWTP
2.5 MGD 1
1.1 MGD 2
6 MGD 3
We are assuming that we can proceed with plans for facilities that would
discharge to Salem and Twelvemile Creeks with updated capacities. We also
assume that the existing Crooked Creek wastewater treatment plant would be
abandoned when the new facilities 3 miles downstream from the existing
plant is in service.

Jordan
Jones R
Goulding
Ms. Ruth Swanek
August 7, 1991
Page 2
Since the study is only in the conceptual planning stages, we need
confirmation as to whether these options still exist.
If you have any additional questions, please contact me or Tai-Yi Su at
[phone]. Thank you for your cooperation in this matter.
Sincerely,
JORDAN, JONES & GOULDING, INC.
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Pam Burnett
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JUL 17 '91 13:56 JORDAN JONES & GOULDING ATLANTA P.1
dardan 2000 Cleaiview Avenue
tlmm Georgia 30344
dones $ A
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building. Numbe.iO4)455-7391
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JUL 17 '91 13:57 JORDAN JONES & GOULDING ATLANTA
P.2
July 17, 1991
Ms. Ruth Swanek
Division of Environmental Management
Water Quality Section
PO Box 29535
Raleigh, NC 27626-0535
Dear Ms. Swanek,
This letter is to inquire about discharge permit limits for
several existing wastewater treatment plants in Union County.
We would like to know the maximum wasteload allocation for
the Crooked Creek Wastewater Treatment Plant, which
discharges into Crooked Creek, and for the Providence Country
Club Wastewater Treatment Plant, which discharges into Six
Mile Creek. Also, we would like to know if the Monroe
Wastewater Treatment Plant's discharge permit can be
increased to 11 MGD.
We are also inquiring about the possibility of obtaining
permits for three new treatment plants on other sites in
Union County. The capacities of the pproposed WWTP are listed
below. Locations of the proposed WWTP are shown in the
attached figures.
Proposed Figure showing
Treatment Plant Capacity location
Salem Creek WWTP 2.5 MGD 1
Twelve Mile Creek WWTP 1.1 MGD 2
New site downstream of
Crooked Creek WWTP 6 MGD 3
If you have any additional questions, please contact me or
Tai-yi Su at [phone]. Thank you for your cooperation
in this matter.
Sincerely,
Pam Burnett