NC0060593_Wasteload Allocation_19950405

Facility Name:
NPDES No.:
Type of Waste:
Facility Status:
Permit Status:
Receiving Stre.:m:
Stream Classification
Subbasin:
County:
Regional Office:
Requestor:
Date of Request:
Topo Quad:
Existing WLA checked:
Staff Report:
Topo checked:
USGS Flows confirmed:
IWC Spreadsheet:
Stream Classification:
Nutrient Sensitivity:
Instream Data:
Request # 7873
Spinnaker Bay WWTP - Mid South Water Systems
NC0060593
100 % Domestic
Existing
Renewal
Lake Norman [Mountain Creek arm]
WS III and B
03-08-32
Catawba
Mooresville
Bolden
6/10/94
E15SW
nr
x Water Supply
nr
Stream Characteristic:
USGS #
Date:
1989
Drainage Area (mi2y
Lake
Summer 7010 (cfs):
n/a
Winter 7Q10 (cfs):
n/a
Average Flow (cfs):
Lake
3002 (cfs):
n/a
IWC (%):
1984: proposed with Secondary Limits, (200 / 100 ml fecal coliforn) recommended
1989: renewed w/ same limits; discharge pipe approximately 150' into lake at bottom, (Staff Report indicated no WO problems)
DMR's
Flows seems to indicate that facility is seasonal, (i.e. summer flows much higher than winter)
Residual chlorine levels are excessively high Otherwise, conventional parameters are well under Permitted levels.
Staff Report
Recommends schedule for facility to meet 15 / 4 in two years... I don't think we will have the justification to do this for an existing
discharge not requesting any changes to their Permit.
Central Files
no additional information
Recommended Limits:
Monthly Averages
Summer Winter
Wastef low (MGD):
0.0125
BOD5 (mg/I):
30
30
NH3N (mg/1):
monitor
monitor
DO (mg/1):
--
--
TSS (mg/1):
30
30
Fecal Col. (/100 ml):
200
200
pH (SU):
6-9
6-9
Residual Chlorine (µg/I):
monitor
monitor
Oil & Grease (mg/I):
--
TP (mg/1):
--
TN (mg/1):
--
There shall be no discharge of floating solids or
visible foam in other than trace amounts.
Upstream Location: not required
Downstream Location: not required
Parameters:
Li /'..' y
5

NPDES WASTE L
C
OiG�Glz
PERMIT NO.: NC0060593
PERMITTEE NAME: Mid South Water Systems, Incorporated
FACILITY NAME: Spinnaker Bay WWTP
Facility Status: Existing
Permit Status: Renewal
Major Minor
Pipe No.: 001
Design Capacity: 0.0125 MGD
Domestic (% of Flow): 100 %
Industrial (% of Flow): n/a %
Comments:
RECEIVING STREAM: Lake Norman (Mountain Creek)
Class: WS-III and B
Sub -Basin: 03-08-32
Reference USGS Quad: E-15-SW (please attach)
County: Catawba
Regional Office: Mooresville Regional Office
Previous Exp. Date: 11/30/94 Treatment Plant Class:
Classification changes within three miles:
Requested by: Dana Bolden Date: 6/8/94
Prepared by: Date:
Reviewed by: Date:
Modeler Date Rec. #
,M � 6 i,
Drainage Area (mil ) Avg. Streamflow (cfs):
7Q10 (cfs) Winter 7Q10 (cfs) 30Q2 (cfs)
Toxicity Limits: IWC % Acute/Chronic
Instream Monitoring:
Parameters
Upstream Location
Downstream Location
Effluent
Characteristics
Summer
Winter
BOD5 (mg/1)
NH3-N (mg/1)
D.O. (mg/1)
TSS (mg/1)
F. Col. (/100 ml)
pH (SU)
Comments:

To: Permits and Engineering Unit
Water Quality Section
Attention: Dana Bolden
SOC PRIORITY PROJECT: No :a
't iS_.••�� � �'' � lit:' ��..�I? • j,
Date: July 20 1994
NPDES STAFF REPORT AND RECOMMENDATIONS
County: Catawba
NPDES Permit No.: NCO06059-1'3 a'
MRO No.. 94-148
PART I - GENERAT. INFORMATION
1. Facility and Address: Spinnaker. Bay Condominiums WWTP
r10 Mid South Water Systems, Inc.
Post Office Box 127
Sherrills Ford, N.C. 28673
2 , Date of IP.`•.'est igat i on : July 19, 1994
3. Report Prepared By: Michael L. Parker, Environ, Engr. II
4. Person. Contacted and Telephone Number: Fred Hamilton, (704)
478-2785.
5. Directions to Site: From the jct. of Hwy. 150 and SR 1844
in southeastern Catawba County, travel south on SR 1844
1..5 miles. The Spinnaker Bay Condominiums are located on the
left side of SR 1844 just before crossing Mountain Creek
(an arm of Lake Norman).
6. Discharge Point(s), List for alldischarge Points: -
Latitude: 35° 34' 00"
Longitude: 80° 59, 25"
Attach a USGS Map Extract and indicate treatment plant site
and discharge point on map.
USGS Quad No.: E 1.5 SW
7. Site size and expansion area consistent with"appli.cation:
Yes. Area is available for expansion, if necessary.
8. Topography (relationship to flood plain -included): Rolling
topography (3-8% slopes). The WWTP site is above.the high
water elevation of Lake Norman.
9. Location of Nearest Dwelling: Approx. 1.50 feet from the
WWTP site.

Page Two
10. Receiving Stream or Affected Surface Waters: Lake Norman
(Mountain Creek arm)
a_ Classification: WS-IV, B
b: River Basin and Subbasin No.: Catawba 030832
C. Describe receiving stream features• and pertinent
downstream uses: The receiving stream is actually
water supply reservoir whose levels are regulated by a
electrical utility company (Duke Power Company). The
reservoir is used extensively for primary and secondary
recreation with frequent bodily contact. One other
known discharger exists just upstream of this facility
(NC0064599).
PART II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
1. a. Volume of Wastewater: 0.0125 MGD (Design Capacity)
b. What is the current permitted capacity: 0.0125 MGD
C. Actual treatment capacity of current facility (current
design capacity): 0.0125 MGD
d. Date(s) and construction activities allowed by previous
ATCs issued in the previous two years: N/A
e. Description of existing or substantially constructed
WWT facilities: The existing WWT facilities consist of
dual aeration basins and clarifiers connected in series
followed by a chlorine contact tank, a flow measuring
device, an aerated sludge holding tank and a stand-by
power generator.
f. Description of proposed WWT facilities: N/A
g. Possible toxic impacts to surface waters: Chlorine is
added to the waste stream.
h. Pretreatment Program (POTWs only): Not Needed.
2. Residual handling and utilization/disposal scheme: Residuals
removed from this system are used to "seed" other Mid South
WWTPs or taken to the City of Newton for disposal.
3. Treatment Plant Classification: Less than 5 points; no
rating (include rating sheet). Class II
4. SIC Code(s): 4952
Wastewater Code(s): 06
5. MTU Code(s): 06007

Page Three
PART III - OTHER PERTINENT INFORMATION
1. Is this facility being constructed with Construction Grant
Funds or are any public monies involved (municipals only)?
2. Special monitoring or limitations (including toxicity)
requests: Typically, all new or expanding WWT facilities.
(treating domestic wastewater) that discharge into water
supply reservoirs In this region receive BPj effluent
limitations (15--BOD,, 4-NH, as N). It has also been our
policy to recommend'BPJ limitations be added to existing
facilities during the Permit renewal process with a schedule
for implementation should existing facilities not be capable
of immediate compliance. It is recommended that this Permit
be renewed containing BPJ limitations to be phased in two
(2) years after Permit reissuance.
3. Important SOC/JOC or Compliance Schedule dates: N/A
4. Alternative Analysis Evaluation
a. Spray Irrigation: Insufficient area.
b: Connect to regional sewer system: None available.
C. Subsurface: Insufficient area.
d, Other disposal options: N/A
PART IV - EVALUATION AND RECOM.MENDa_T I OINS
The permittee requests renewal of the subJect Permit. There
have been no changes and\n,- modifications since the Permit .-72S
last renewed. Additional WWT facilities may be necessary in order
t_n_ n_n_mply with the BPj limitations that Will become effective two
(2) years after Permit rei.-Su nce_
It is recommended that the Permit (containing the revised
effluent limitation noted above) be renewed as requested:
t
7 zo
Signature of eport Preparer Date
Water Quality Region 1 Supervisor
e7 - 20
Date