NC0060461_Wasteload Allocation_19960502

Permit Summary
NC0060461
This is a permit renewal for a discharge into Belews Creek. This facility is in the
process of expanding to 0.2 MGD with an ultimate design flow of 0.385 MGD.
Per Mike Mickey (W-SRO), permit should be renewed without previous 0.1
MGD limits page. Within the past twenty four months this facility had violations
of BOD, TSS and Fecal Coliform. Since expansion to .2 MGD will be completed
in the near future, Permits and Engineering will recommend existing limits at
expansion flows of .2 MGD and .385 MGD only with monitoring reflective of a
class II facility.

NC0060461
Residual Chlorine
7010 (CFS)
0.29
DESIGN FLOW (MGD)
0.2
DESIGN FLOW (CFS)
0.31
STREAM STD (UG/L)
17.0
UPS BACKGROUND LEVE
0
IWC (%)
51.67
Allowable Concentration (
390
Ammonia as NH3
(summer)
7010 (CFS)
DESIGN FLOW (MGD)
DESIGN FLOW (CFS)
STREAM STD (MG/L)
UPS BACKGROUND LEVI
IWC (%)
Allowable Concentration
Ammonia as NH3
(winter)
7010 (CFS)
Fecal Limit 200/100ml DESIGN FLOW (MGD)
Ratio of 0.9 :1 DESIGN FLOW (CFS)
STREAM STD (MG/L)
UPS BACKGROUND LEVI
IWC (%)
Allowable Concentration
0.29
0.2
0.31
1.0
0.22
51.67
1.73
0.98
0.2
0.31
1.8
0.22
24.03
B.79

NCO060461
Residual Chlorine
Ammonia as NH3
(summer)
7Q10 (CFS)
0.29
7010 (CFS)
0.29
DESIGN FLOW (MGD)
0.1
DESIGN FLOW (MGD)
0.1
DESIGN FLOW (CFS)
0.155
DESIGN FLOW (CFS)
0.155
STREAM STD (UG/L)
17.0
STREAM STD (MG/L)
1.0
UPS BACKGROUND LEVE
0
UPS BACKGROUND LEVI
0.22
IWC (%)
34.83
IWC (%)
34.83
Allowable Concentration (
48.81
Allowable Concentration
2.46`
Ammonia as NH3
(winter)
7Q10 (CFS)
0.98
Fecal Umft
200/100ml
DESIGN FLOW (MGD)
0.1
Ratio of 1.9 :1
DESIGN FLOW (CFS)
0.155
STREAM STD (MG/L)
1.8
UPS BACKGROUND LEVI
0.22
IWC (%)
13.66 ,
Allowable Concentration
11.79

NC0060461
Residual Chlorine
Ammonia as NH3
(summer)
7Q10 (CFS)
0.29
7010 (CFS)
0.29
DESIGN FLOW (MGD)
0.385
DESIGN FLOW (MGD)
0.385
DESIGN FLOW (CFS)
0.59675
DESIGN FLOW (CFS)
0.5968
STREAM STD (UG/L)
17.0
STREAM STD (MG/L)
1.0
UPS BACKGROUND LEVE
0
UPS BACKGROUND LEVI
0.22
IWC (%)
67.30
IWC (%)
67.30
Allowable Concentration (
25.26
Allowable Concentration
�.38
�IU
Ammonia as NH3
(winter)
7010 (CFS)
0.98
Fecal Limit
2001100mi
DESIGN FLOW (MGD)
0.385
Ratio of 0.5 :1
DESIGN FLOW (CFS)
0.5968
STREAM STD (MG/L)
1.8
UPS BACKGROUND LEVI
0.22
IWC (%)
37.85.
Allowable Concentration
4.39
L�c

A. O. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS FINAL Permit No. NCO060461
During the period beginning after expansion above 0.200 MGD and lasting until expiration, the Permittee is authorized to discharge from
outfall(s) serial number 001. Such discharges shall be limited and monitored by the permittee as specified below:
Effluent Characteristics
Flow
BOD, 5 day, 200C
Total Suspended Residue
NH3 as N"'
Dissolved Oxygen"
Fecal Coliform (geometric mean)
Total Residual Chlorine
Temperature, °C
Total Nitrogen (NO2 + NO3 + TKN)
Total Phosphorus
Conductivity
Discharge
Limitations
Monitoring
Requirements
*Sample
Monthly Avg.
Weekly
Avg, Daily Max
Measurement
Frequency
Sample
Type
Location
0.385 MGD
Continuous
Recording
I or E
30.0 mg/l
45.0 mg/l
Weekly
Composite
E
30.0 mg/l
45.0 mg/l
Weekly
Composite
E
2.0 mg/l
Weekly
Composite
E
Weekly
Grab
E, U, D
200.0 /100 ml
400.0 /100 ml
Weekly
Grab
E,U,D
25 µg/I
2/Week
Grab
E
%
Weekly
Grab
U,D
Quarterly
Composite
E
Quarterly
Composite
E
Weekly
Grab
E,U,D
* Sample locations: E - Effluent, I - Influent, U - Upstream above outfall, D - Downstream at NCSR 2011.
** The daily average dissolved oxygen effluent concentration shall not be less than 5.0 mg/l.
***From November 1 through March 31, the limit for NH3-N shall be 4.4 mg/l.
The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall be monitored weekly at the effluent by grab
sample.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

A. O. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS FINAL
Permit No. NCO060461
During the period beginning after expansion above 0.200 MGD and lasting until expiration, the Permittee is authorized to discharge from
outfall(s) serial number 001. (Continued)
Effluent Characteristics
Temperature
Discharge Limitations
Units (s en city)
Monthly Avg, Weekly Avg,
Monitoring Requirements
Measurement Sample
Daily Max Freauencv Tvpe
Daily Grab
*Sample
Location
E

cc: Permits and Engineering
Technical Support Branch
County Health Dept.
Central Files
WSRO
SOC PRIORITY PROJECT: No X
To: Permits and Engineering Unit
Water Quality Section
Attention: Mack Wiggins
Date: May 2, 1996
NPDES STAFF REPORT AND RECOMMENDATION
County Forsyth
Permit No. NC0060461
PART I - GENERAL INFORMATION
1. Facility and Address: Abington Subdivision WWTP
Mr. Carl Daniel, V.P.
Carolina Water Service, Inc. of N.C.
P O Box 240705
Charlotte, N.C. 28224
2. Date of Investigation: March 19, 1996
3. Report Prepared by: Mike Mickey, Environmental Specialist II
4. Persons Contacted and Telephone Number: Mr. Bruce Haas,
Carolina Water Service, [phone]
5. Directions to Site: Take Hwy 158 N. out of Winston-Salem.
After crossing through the Hwy. 66 intersection, proceed 0.6
mile and then turn right onto Vance Road (SR 2011). Continue
on Vance Road approximately 2 . 4 mile to Kerner Road ( SR 2021).
Turn right and proceed 0.6 mile and then turn right into the
subdivision onto Abington Drive. Turn right again onto Saint
Regis Lane, then left onto Avenbury Circle, left onto
Middleham Drive and then left onto Bainburgh Circle. The WWTP
is at the end of the road on left.
6. Discharge Points(s), List for all discharge points:
Latitude: 360 10' 08" Longitude: 800 06' 00"
U.S.G.S. Quad No. C-18-NE U.S.G.S. Quad Name Belews Creek
7. Site expansion area consistent with application? X Yes
8. Topography (relationship to flood plain included): The WWTP
is located on top of a creek that was relocated for the WWTP
expansion.

9. Location of nearest dwelling: The closest dwelling is located
within 100 feet of the WWTP.
10. Receiving stream or affected surface waters: Belews Creek
a. Classification C
b. River Basin and Subbasin No.: 03-02-01
C. Describe receiving stream features and pertinent
downstream uses: The Kynwood WWTP (NC0046752, 0.072 MGD)
discharges into Belews Creek approximately 0.6 mile
downstream of the Abington facility. The exact location
of Abington's discharge pipe could not be found as the
outfall is submerged in a beaver pond (>10 acres). In
addition, a large wetland complex of an additional 30
acres is located below the beaver pond. There is no
defined stream channel so the WWTP discharges basically
into a pond situation.
Part II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
a. Volume of Wastewater to be permitted: The permit was
modified on 11-18-94 to contain the following effluent
pages:
1) 0.1 MGD (Current design)
2) 0.2 MGD (A/C issued 11-14-94 for expansion)
3) 0.385 MGD (Ultimate permitted capacity)
b. What is the current permitted capacity of the Waste Water
Treatment facility? See a above.
C. Actual treatment/design capacity of the current facility?
A/C issued 10-7-85 for a 0.1 MGD WWTP.
d. Date(s) and construction activities allowed by previous
A/C's issued in the previous two years. A/C issued 11-
18-94 for expansion to 0.2 MGD.
e. Please provide a description of existing or substantially
constructed wastewater treatment facilities; The existing
0.10 MGD system consists of an influent pump station,
three aeration tanks (capacity of 100,000 gallons), a
17,870 gallon clarifier, a 2,275 gallon chlorine contact
tank with tablet chlorinator, a Stevens flow measurement
device, post aeration tank and a 7,630 gallon sludge
holding basin and standby generator.
f. Provide a description of proposed WWTP facilities. The
proposed 0.2 MGD WWTP• will consist of the following:
42,460 gallon equalization basin with dual 173 GPM pumps,
NPDES Permit Staff Report
Version 10/92
Page 2

bar screen and flow splitter box, dual 100,000 gallon
aeration basins (total volume of 200,000) dual 22,829
gallon clarifiers (total volume of 45,658 gallons),
tablet chlorinators, 4,167 gallon contact tank,
dechlorination unit, 2000 gallon post aeration chamber,
Stevens flow recorder and standby generator.
g. Possible toxic impacts to surface waters: None known.
h. Pretreatment Program (POTWs only): NA
2. Residuals handling and utilization/disposal scheme:
Solids are removed from the WWTP by Piedmont Power Wash, Inc.,
for disposal in the nearest Winston-Salem POTW.
3. Treatment plant classification (See attached rating sheet).
Class II (50 points).
4. SIC Code(s): 4952
Primary 05 Main Treatment Unit Code: 0 6 0 X 7
PART III - OTHER PERTINENT INFORMATION
1. Are Construction Grant Funds or public monies involved. NA
2. Special monitoring or limitations requests: The permit
specifies downstream monitoring at NCSR 2014. Please be
advised that the road number for Vance Road is now SR 2011 and
not SR 2014.
3. Important SOC dates: NA
4. Alternative Analysis Evaluation: NA for existing facility.
5. Other Special Items: None
PART IV - EVALUATION AND RECOMMENDATIONS
The Abington subdivision consists of approximately 389 homes
with future expansion of the subdivision underway. This is the
reason that the WWTP is presently being upgraded from 0.1 MGD to
0.2 MGD (See A/C issued 11-18-94). Hopefully, the expansion will
result in an improvement in effluent quality.
NPDES Permit Staff Report
Version 10/92
Page 3

WSRO recommends reissuance.
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Signature of report prepay
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Water Quality Regional upervisor
5 --C67.0
Date
NPDES Permit Staff Report
Version 10/92
0
Page 4