NC0074012_Wasteload Allocation_19960423

NPDES DOCUHENT SCANNING COVER SHEET
NC0074012
Lincoln County/Forney Crk WWTP
NPDES Permit:
Document Type:
Permit Issuance
(
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Complete File - Historical
Speculative Limits
Instream Assessment (67b)
Environmental Assessment (EA)
Permit
History
Document Date:
April 23, 1996
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FACILITY INFORMATION
Facility
NPDES No.
Design Flow (MGD)
Facility Class
Staff Review and Evaluation
NPDES Wastewater Permit
Forney Creek WWTP
NC0074012
0.076ID.7
II
STREAM CHARACTERISTICS
Stream Name
Stream Class
Sub -basin
Drainage Area (mi2)
S7Q10 (cfs)
W7Q10 (cfs)
30Q2 (cfs)
IWC (%)
Forney Creek
C
03-08-33
5.94
0.6
1.4
1.7
16.41 ' .076%/ 6l, (®a 75)
Proposed Changes
Parameters Affected
Basis for change(s)
Limits changed from 5 & 21 to
4.3&17(S&W)
NH3
Change in 7Q10
Sample shall be taken at
effluent also
Conductivity
.0500 regs
Compliance Schedule: N/A
Special Condition(s): N/A
Permits & Engineering Comments:
Facility is almost finished with upgrade from 0.076 MGD to 0.75 MGD.
Compliance da shows problems with high BOD(3 times during 9410-9509)
and low pH(7 times during the same period
Region has already sent a staff report and recommended reissuance of this permit.
Recommend renewal of this permit with above changes.
Prepared by:
.n
cri
Regional Office Evaluation and Recommendations:
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3/19/96
Permit No. NC0074012
Forney Creek WWTP
Lincoln County
2/1/96 Ack letter sent, requested Staff Report.
3/13 Received Staff Report.
Facility is almost finished with upgrade from 0.076 MGD to 0.75 MGD.
Region recommends reissuance.
3/14 Drafted permit. Instream data and DMR's look good.
Central Files correspondence info OK.
Compliance data shows problems with high BOD three times from 10/94 to
09/95 and low pH seven times during the same period.
Changed lat on State Network to agree with SR (to 53" from 54").
Updated sup to cover page to reflect construction.
Made changes to effluent pages as per .0500 regs.
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A. (). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS SUMMER (Atpril 1 - October 31) Permit No. NC0074012
During the period beginning on the effective date of the permit and lasting until expansion above 0.076 MGD or 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 Characteristic Discharge Limitation! Monitoring RequirementE
Measurement Sample *Sample
Monthly Avg Weekly Avg. Daily Max Frequency Type Location
Flow 0.076 MGD Continuous Recording I or E
BOD, 5 day, 20°C** 30.0 mg/I 45.0 mg/I Weekly Composite E, I
Total Suspended Residue** 30.0 mg/I 45.0 mg/I Weekly Composite E, I
NH3 as N 5. mg/I Weekly Composite E
Dissolved Oxygen 3 Weekly Grab E, U, D
Fecal Coliform (geometric mean) 200.0 /100 ml 400.0 /100 ml Weekly Grab E,U,D
Total Residual Chlorine 2/Week Grab E
Temperature(] Daily °lX Grab E,U,D
Total Phosphorus Quarterly Composite E
Total Nitrogen (NO2+NO3+TKN) Quarterly Composite E
Conductivity Weekly Grab E U,D
* Sample locations: E - Effluent, I - Influent, U - Upstream, 50 ft. above discharge, D - Downstream, 1.0 mile below the discharge.
Stream samples shall be taken once per week.
** The monthly average effluent BOD5 and Total Suspended Residue concentrations shall not exceed 15 % of the respective influent value (85
1\ % removal).
- .77-o
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. (). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS WINTER (November 1 - March 31) Permit No. NC0074012
During the period beginning on the effective date of the permit and lasting until expansion above 0.076 MGD or expiration, the Permittee is
authorized to discharge from outfall(s) serial number 001. Such discharges shall be limited and monitored by the perm ittee as specified below:
Effluent Characteristic
Flow
BOD, 5 day, 20°C**
Total Suspended Residue**
NH3 as N
Dissolved Oxygen
Fecal Coliform (geometric mean)
Total Residual Chlorine
Temperature ° (.,
Total Phosphorus
Total Nitrogen (NO2+NO3+TKN)
Conductivity
Discharge Limitation!
Monthly Avq Weekly Avq. Daily Max
0.076 MGD
30.0 mg/I 45.0 mg/I
30.0 mg/I 45.0 mg/I
2-f.0 mg/I
(-7
200.0 /100 ml 400.0 /100 ml
* Sample locations: E - Effluent, I - Influent, U
-stream samples shall be taken once per week.
f ** The monthly average effluent BOD5 and Total Suspended Residue concentrations shall not exceed 15 % of the respective influent value (85
\ % removal).
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.
Monitoring
Measurement
Frequency
Continuous
Weekly
Weekly
Weekly
Weekly
Weekly
2/Week
Daily 7%
Quarterly
Quarterly
Weekly
Requirements
Simple
Type
Recording
Composite
Composite
Composite
Grab
Grab
Grab
Grab
Composite
Composite
Grab
''Sample
Location
I or E
E, I
E, I
E
E, U, D
E,U,D
E
E,U,D
E
E
li7 U, D
Upstream, 50 ft. above discharge. D - Downstream, 1.0 mile below discharge.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

A. ( ). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS SUMMER (April 1 - October 31) Permit No. NC0074012
0 5 rACD or
During the period beginning on expansion above 0.076 MGD and lasting untilexpiration, the Fermium is authorized to discharge from
outfall(s) serial number 001. Such discharges shall be limited and monitored by the permittee as specified below:
Effluent Characteristic Discharge Limitation:
Monthly Avg
Flow 0.75 MGD
BOD, 5 day, 20°C** . 14.0 mg/I
Total Suspended Residue** 30.0 m g / I
NH3 as N 2.0 mg/I
Dissolved Oxygen***
Fecal Coliform (geometric mean) 200.0 /100 ml
Total Residual Chlorine
Temperature, °(i
Total Phosphorus
Total Nitrogen (NO2+NO3+TKN)
Conductivity
Weekly Avq. Daily Max
21.0 mg/I
45.0 mg/I
400.0 /100 ml
25.0 µg/I
Monitoring
Measurement
Frequency
Continuous
3/Week
3/Week
3/Week
3/Weeke1;ce
3/Week otteg
3/Week
Daily aitto
Quarterly
Quarterly
3/Week Itigtr
Requirements
Sample
Type
Recording
Composite
Composite
Composite
Grab
Grab
Grab
Grab
Composite
Composite
Grab
*Sample
Location
1 or E
E, 1
E, 1
E
E, U, D
E,U,D
E
E,U,D
E
E
E. U,D
* Sample locations: E - Effluent, I - Influent, U - Upstream, 50 fi:. above discharge. D - Downstream, 1.0 mile below discharge.
Stream samples shall be taken 3/week during June, July, August and September and once per week during the remaining months of the year.
/
** The monthly average effluent BOD5 and Total Suspended Residue concentrations shall not exceed 15 % of the respective influent value (85
% removal).
*** The daily average dissolved oxygen effluent concentration shall not be less than 5.0 zstareor
The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall be monitored 3/week at the effluent by grab
sample.
There shall be no discharge of floating solids or visible foam in other than trace amounts.
�J

A. (). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS WINTER (November 1 - March 31) Permit No. NC0074012
During the period beginning on expansion above 0.076 MGD and lasting until expansion above 0.75 MGD or 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 Characteristic Discharge Limitation!
Flow
BOD, 5 day, 20°C**
Total Suspended Residue**
NH3 as N
Dissolved Oxygen***
Fecal Coliform (geometric mean)
Total Residual Chlorine
Temperature
Total Phosphorus
Total Nitrogen (NO2+NO3+TKN)
Conductivity
* Sample locations: E - Effluent, I - Influent, U - Upstream, 50 ft. above discharge. D - Downstream, 1.0 mile below discharge.
Stream samples shall be taken 3/week during June, July, August and September and once per week during the remaining months of the year.
** The monthly average effluent BODS and Total Suspended Residue concentrations shall not exceed 15 % of the respective influent value (85
% removal).
*** The daily average dissolved effluent concentration shall not be less than 5.0 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.
Weekly Avq. Daily Max
Monitoring
Measurement
Monthly Avq
0.75 MGD
28.0 mg/I
30.0 mg/I
4.0 mg/I
200.0 /100 ml
42.0 mg/I
45.0 mg/I
400.0 /100 ml
25.0 µg/I
Frequency
Continuous
3/Week
3/Week
3/Week
3/Week
3/Week
3/Week
Daily
Quarterly
Quarterly
3/Week
Requirements
Sample
Type
Recording
Composite
Composite
Composite
Grab
Grab
Grab
Grab
Composite
Composite
Grab
*Sample
Location
1 or E
E, I
E, 1
E
E, U, D
E,U,D
E
E,U,D
E
E
U,D
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SOC PRIORITY PROJECT: Yes No X
To: Permits and Engineering Unit
Water Quality Section
Attention: Mary L. Cabe
Date: March 12, 1996
NPDES STAFF REPORT AND RECOMMENDATION
County: Lincoln
Permit No. NC0074012
MRO No. 96-044
PART I - GENERAL INFORMATION
1. Facility and Address: Middle Forney Creek WWTP
Lincoln County Utilities
115 West Main Street
Lincolnton, North Carolina 28092
2. Date of Investigation: 02-29-96
3. Report Prepared By: G. T. Chen
4. Persons Contacted and Telephone Number: Mr. Billy M. Eggers,
ORC (IV), [phone]
5. Directions to Site: From the junction of Highway 73 and
Highway 16 in southeastern Lincoln County, travel west on
Highway 73 approximately 1.40 miles to the junction with South
Little Egypt Road (SR 1386). Turn onto SR 1386 and travel
southeast approximately 0.80 mile. The treatment plant is on
the left (north) side of SR 1386.
6. Discharge Point(s). List for all discharge points:
Latitude: 35° 26' 53" Longitude: 81° 00' 39"
Attach a U.S.G.S. map extract and indicate treatment facility
site and discharge point on map.
USGS Quad No.: F 14 NE USGS Quad Name: Lowesville, NC
7. Site size and expansion are consistent with application?
Yes.
8. Topography (relationship to flood plain included): The site
appears to be adjacent to the flood plain with slopes
relatively flat.
9. Location of nearest dwelling: Approximately 600 feet.

10. Receiving stream or affected surface waters: Forney Creek
a. Classification: C
b. River Basin and Subbasin No.: Catawba and 03-08-33
c. Describe receiving stream features and pertinent
downstream uses: The receiving stream was approximately
8-10 feet wide with a well defined channel. A good flow
was observed on the day of the investigation. Down-
stream users are unknown.
PART II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
1. a. Volume of wastewater to be permitted: 0.076 MGD and
0.750 MGD (Ultimate Design Capacity).
b. What is the current permitted capacity of the wastewater
treatment facility? 0.076 MGD and 0.750 MGD.
c. Actual treatment capacity of the current facility
(current design capacity)? 0.076 MGD.
d. Date(s) and construction activities allowed by previous
Authorizations to Construct issued in the previous two
years: An Authorization to Construct was issued in May,
1995 to the County of Lincoln for the construction of a
0.750 MGD treatment facility to replace the existing
0.076 MGD facility. Currently the new facility is under
construction and it is anticipated that the new facility
will be operational in July, 1996
e. Please provide a description of existing or substantially
constructed wastewater treatment facilities: The
existing facility is a 76,000 GPD wastewater treatment
plant consisting of a 10,502 gallon flow equalization
tank, a 100,000 gallon aeration tank, a 19,173 gallon
clarifier, a 7,875 gallon aerated sludge holding tank,
dual 200 CFM blowers, a tablet chlorinator, a 2,648
gallon chlorine contact tank, and a flow recorder with
totalizer.
f. Please provide a description of proposed wastewater
treatment facilities: The proposed new facility will
consist of an influent pump station, a Parshall flume
with ultrasonic measurement and recording, a mechanical
bar screen with manual bypass screen, an aerated grit
removal basin, 0.6 MG oxidation ditch with three (3)
concentric channels, four (4) 25 Hp and two (2) 10 Hp
rotor aerators, dual 35 ft. diameter final clarifiers,
NPDES Permit Staff Report
Version 10/92
Page 2

g•
dual chlorine contact chambers with sulfur dioxide
dechlorination, effluent flow measurement with a
rectangular weir and instrumentation (ultrasonic flow
measurement with recording), cascade post aeration, a DAF
sludge thickener, a return sludge pumping station,
conversion of the existing aeration basins (approx 0.15
MG) to aerobic digesters, conversion of the existing
final clarifier to a gravity sludge thickener, a new
thickened sludge pump station, a new 0.33 MG sludge
holding tank, a pump station for sludge recirculating and
truck loading, and a caustic feed system for pH control
with a 5000 gallon storage tank.
Possible toxic impacts to surface waters: Unknown.
h. Pretreatment Program (POTWs only): N/A.
2. Residuals handling and utilization/disposal scheme:
a. If residuals are being land applied, please specify DEM
Permit No.: N/A.
Residuals Contractor: N/A.
Telephone No.: N/A.
b. Residuals stabilization: PSRP: N/A.
RFRP: N/A.
Other: N/A.
c. Landfill: N/A.
d. Other disposal/utilization scheme (specify): Sludge is
transferred to the City of Lincolnton WWTP and land
applied on farmland approved under Permit No. WQ0002712.
3. Treatment plant classification (attach completed rating
sheet): Class II, see attached rating sheet (existing
facility). Class III, see attached rating sheet (new
facility).
4. SIC Code(s): 4952
Wastewater Code(s):
Primary: 01 Secondary:
Main Treatment Unit Code: 06007
NPDES Permit Staff Report
Version 10/92
Page 3

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. (New facility is funded by construction grant)
2. Special monitoring or limitations (including toxicity)
requests: None.
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: 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 ar no known air quality,
groundwater and/or hazardous materials concerns.
6. Other,Special Items: None.
PART IV - EVALUATION AND RECOMMENDATIONS
It is recommended that the subject Permit be renewed as
requested.
Signatu of Report Preparer
/r4
Water Qualitygional Supervisor
• �?, /9, C
Date
NPDES Permit Staff Report
Version 10/92
Page 4