NC0062481_Wasteload Allocation_19950405

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:
Mallard Head Condomimiums - Mid S
NC0062481
100 % Domestic
Existing
Renewal
unnamed tributary Reeds Creek
WS IV and B
03-08-32
Iredell
Mooresville
Robson
12/2/94
E15SW
Request # B8117
outh Water Systems
Stream Characteristic:
USGS #
Date:
Drainage Area (mi2):
Summer 7Q10 (cfs):
Winter 7Q10 (cfs):
Average Flow (cfs):
3002 (cfs):
IWC (%):
02.1425.9099
1990
0.18
0.0
0.05
0.19
0.08
100 %
Existing WLA checked:
Staff Report:
Topo checked:
USGS Flows confirmed:
IWC Spreadsheet:
Stream Classification:
Nutrient Sensitivity:
Instream Data:
x
na
x
1978: recommended Secondary Limits w/ 200 / 100 mL fecal coliform for discharge directly to Reeds Creek - no model
1985: discharge point V'd to ut to Reeds Creek; model run and recommended limits were 18 mg/I BOD5, 11 mg/I NH3N, 6 mg/I
dissolved oxygen, 30 mg/I TSS, 200 / 100 mL fecal coliform, and 6 - 9 SU pH.
1990: Staff Report indicated that facility marginally maintained; built for 10,000 gpd but only receiving 3 - 4,000 gpd. Permit was
issued with both an ammonia limit and a toxicity test. Applicant called in and chose ammonia limit. Applicant was also
informed that the ammonia limit was a monthly average and not a daily maximum.
DMR's
Actual wasteflow discharge is substantially lower than Permitted; note this on Streamline form.
Residual chlorine levels are excessive.
Facility well w/in Permitted limits.
Instream Data:
Supersaturation indicated both up and downstream during summer months.
Conductivity very similar up and downstream and throughout the year.
Staff Report U • Note-<< to Apr: — �� 61 f.- 1 p!Ct ,d
0) n'J
Existing Limits:
Wasteflow (MGD):
BOD5 (mg/1):
NH3N [April 1 - October 31 ] (mg/1):
NH3N [November 1 - March31] (mg/I):
DO (mg/I):
TSS (mg/I):
Fecal Col. (/100 mi):
pH (SU):
Residual Chlorine (µg/I):
Oil & Grease (mg/I):
TP (mg/I):
TN (mg/1):
Temperature (° C):
There shall be no discharge of floating
Upstream Location:
Downstream Location:
Parameters:
Monthly Averages
0.020
18
6.0 Daily Average
30
200
Daily Maximum
27
<-- 1.0
<-- 1.8
45
400
6-9
monitor
not required
not required
not required
monitor
solids or visible foam in other than trace amounts.
at least 100' above discharge
SR 1114
temperature, dissolved oxygen, fecal coliform, conductivity

Mallard Head Condominiums NC0062481
Upstream: 100' above outfall
Month Temp DO
Saturation Fecal Conductivity
Dec-94
Nov-94
Oct-94
Sep-94
Aug-94
JuI-94
Jun-94
May-94
Apr-94
Mar-94
Feb-94
Jan-94
9
11
16
20
18
20
15
14
9
9
8
10.3
10.6
9.7
9.5
11.9
11.9
10.6
9.6
9.6
9.6
7.3
89%
96%
98%
105%
126%
131%
0%
105%
93%
83%
83%
61%
43
27
52
36
28
30.2
no data
83
< 24
110
167
226
51.7
40
35
42.5
42
42.5
45
42.5
40
45
45
Downstream: SR 1114
Temp DO
Saturation Fecal Conductivity
10
12
18
21
18
20
15
15
9
9
7
10.0
10.2
9.2
9.2
11.8
11.7
10.2
9.7
9.3
9.6
7.2
89%
95%
97%
103%
125%
129%
0%
101%
96%
80%
83%
59%
58
49
64
64
24
42
no data
56
86
109
134
153
53.2
44
35
45
48
47.5
45
45
36
45
45
Ammonia [2 / 4 mg/I] - Residual Chlorine - Fecal Coliform
Instream Waste Concentrations
Residual Chlorine
7Q10 (cfs)
Design Flow (mgd)
Design Flow (cfs)
Stream Std (µg/I)
Upstream bkgrd level (µgf)
IWC (%)
Allowable Concentration (µg/I)
Allowable Concentration (mg/I)
Fecal Limit
Ratio of 0.0 :1
0.0
0.02
0.031
17
0
100.0%
17.0
0.017
200/100m1
0.0
0.02
0.031
1
0.22
100.0%
1.0
0.05
0.02
0.031
1.8
0.22
38.3%
4.3
Ammonia as NH3
(summer)
7Q10 (cfs)
Design Flow (mgd)
Design Flow (cfs)
Stream Std (mg/l)
Upstream bkgrd level (mg/I)
IWC (%)
Allowable Concentration (mg/I)
Ammonia as NH3
(winter)
7Q10 (cfs)
Design Flow (mgd)
Design Flow (cfs)
Stream Std (mg/I)
Upstream bkgrd level (mg/I)
IWC (%)
Allowable Concentration (mg/1)
1/26/95

e'
awl) vuelm-J
SOC PriorityProject:
If Yes, SOC No.:
`Permits nd Engineering Unit
Water Gu ality Section
Attention: Susan Robson
Date: January 26, 1995
NPDES STAFF REPORT AND RECOMMENDATIO
County: Iredell
Permit No. NC0062481
PART I - GENERAL INFORMATION
Yes No X
1. Facility and Address: Mallard Head Condominiums WWTP
Mid South Water Systems, Inc.
Post Office Box 127
Sherrills Ford, North Carolina 28673
2. Date of Investigation: January 26, 1995
3. Report Prepared by: Kim H. Colson, Environmental Engineer I
4. Persons Contacted and Telephone Number: Tony Parker, (704)
478-2785.
5. Directions to Site: From the intersection of SR 1100 (Brawley
School Road) and SR 1112 (Stutts Road), travel south on SR
1112 approximately 0.4 miles. The entrance to the
condominiums is located on the right side of SR 1112. The
WWTP is located at the end of a dirt drive behind the
condominiums.
6. Discharge Point(s), List for.all discharge points:
Latitude: 35° 33' 45" Longitude: 80° 54'.22"
Attach a USGS map extract and indicate treatment facility site
and discharge point on map.
U.S.G.S. Quad No.: E15SW
U.S.G.S. Quad Name: Lake Norman North, NC
Site size and expansion area consistent withap.plication?
Yes. .,.s
Topography (relationship to flood plain inc1_,
sloping; the WWTP is not located within t
plain.
Moderate
•dear flood
9. Location of nearest dwelling: None within 500 feet.

Page Two
10. Receiving stream or affected surface waters: UT to Lake
Norman
a.
b.
c.
Classification: WS-IV CA
River Basin and Subbasin No.: Catawba
Describe receiving stream features"''_ pertinent
downstream uses: The receiving stream is a small creek.
The 7Q10 stream flow is 0 cfs, 30Q2 streamflow may also
be 0 cfs. General "C" classification uses downstream
until the stream reaches Lake Norman, which is used as a
water supply and for primary recreation.
PART II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
1. a. Volume of wastewater to be permitted: 0.020 MGD
(ultimate design capacity)
b. Current permitted capacity of the wastewater treatment
facility: 0.020 MGD
c. Actual treatment capacity of the current facility
(current design capacity): 0.010 MGD
d. Date(s) and construction activities allowed by previous
Authorizations to Construct issued in the previous two
years: N/A
e. Please provide a description of existing or substantially
constructed wastewater treatment facilities: The
existing WWT facility is a 10,000 gpd package type WWTP
consisting of a bar screen, aeration basin, clarifier,
chlorine disinfection,f aerobic sludge holding tank,
followed by cascade post aeration.
f. Please provide a description of proposed wastewater
treatment facilities: N/A
g•
Possible toxic impacts to surface waters: N/A
•
h. Pretreatment Program (POTWs only): N/A
Residuals handling and utilization/disposal scheme:
a. If residuals are being land applied, p±�a,,,<specify DEM
Permit No.: N/A
Residuals Contractor: N/A
Telephone No.: N/A
b. Residuals stabilization: PSRP PFRP' Other
c. Landfill: N/A

Page Three
d. Other disposal/utilization scheme (Specify): Sludge is
pumped by Lutz Septic Service and taken to the City of
Newton's WWTP.
Treatment plant classification (attach
sheet): Class II
SIC Code(s): 4952 -
Wastewater Code(s)
Primary: 06 Secondary:
Main Treatment Unit Code: 06007
PART III — OTHER PERTINENT INFORMATION
rating
1. Is this facility being constructed with Construction Grant
Funds or are any public monies involved? N/A
2. Special monitoring or limitations (including toxicity)
requests: N/A
3. Important SOC, JOC or Compliance Schedule dates (Please
indicate): N/A
4. Alternative Analysis Evaluation:
Spray Irrigation: N/A
Connection to Regional Sewer System: N/A
Subsurface: N/A
Other disposal options: N/A
5. Air quality and/or groundwater concerns or hazardous materials
utilized at this facility that may impact water quality, air
quality, or groundwater: There are no known air quality,
groundwater, or hazardous materials concerns-.
6. Other Special Items: N/A
PART IV — EVALUATION AND RECOMMENDATIONS
The permittee, Mid South Water Systems, Inc., has applied for
mit renewal. The WWTP serves the Mallard Head Condominiums.

.Page Four
It is recommended that the permit be renewed as requested.
Signatureof report preparer
)71 /1(11
Water Quali r., Regional Supervisor
/ ,76
Date