NC0043125_Wasteload Allocation_19891113

NPDES DOCUMENT :SCANNING. COVER :SHEET
NC0043125
The Patterson School WWTP
NPDES Permit:
Document Type:
Permit Issuance
Wasteload
Allocation
Authorization to Construct (AtC)
Permit Modification
Complete File - Historical
Engineering Alternatives (EAA)
Correspondence
Instream Assessment
(67b)
Speculative Limits
Environmental Assessment (EA)
Permit
History
Document Date:
November 13, 1989
Z`his document is printed on reuse paper - ighiore any
content on the resterse side

NPDES WASTE LOAD ALLOCATION
PERMIT NO.: NC0043125
FACILITY NAME. The Patterson School
Facility Status: Existing
Permit Status: Modification
Major Minor
Pipe No.: 001
Design Capacity: 0.025 MGD
Domestic (% of Flow): 100 %
Industrial (% of Flow): n/a %
Comments:
Change in discharge location.
RECEIVING STREAM: Yadkin River
Class: C-Trout
Sub -Basin: 03-07-01
Reference USGS Quad: (l7s,
County: Caldwell
Regional Office: Mooresville Regional Office
Requested by:
Prepared by:
Mack K. Wiggins, Jr.
Reviewed by: /LE- 4n
/1
(please attach)
Date: 9/18/89
Date: /6/bR /g f
Date: '/31/e9
Modeler
Date Rec.
#
C.J.-1,
q t vaFt
S4 t o
Drainage Area (mi2 ) -/a .3
Avg. Streamflow (cfs): 3
7Q10 (cfs) is Winter 7Q10 (cfs) / 30Q2 (cfs)
Toxicity Limits: IWC % Acute/Chronic
Instream Monitoring:
Parameters
Upstream it!
Downstream Al
Location
Location
Effluent
Characteristics
Summer
Winter
BOD2 (mg/1)
3d
NH3-N (mg/1)
_
D.O. (mg/1)
TSS (mg/1)
30
F. Col. (/100 ml)
-
pH (SU)
b _ 9
PLOTTED
Comments: Lao ArnLi.M •-14n c037e1,

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Q A= a5•o► a
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32'30"
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LENOIP 1 Id U.S. 1211 7 MI.
PATTERSON SCHOOL
CALDY'IE.LL COUNT`(
SCALE. I "=Z000t
QUADRANGLE LOCATION
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Heavy-duty _•
Medium -duty _
ROAD CLASSIFICATION
Light -duty
Unimproved dirt ---_-----
State Route
BUFFALO COVE, N. C.
N3600—W8130/7.5
1967
3985
AMS 4656 11 SE -SERIES V842

Request No. :5410
Permit Number
Facility Name
Type of Waste
Status
Receiving Stream
Stream Class
Subbasin
County
Regional Office
Requestor
Date of Request
Quad
WASTELOAD ALLOCATION APPROVAL FORM
NC0043125
THE PATTERSON SCHOOL
DOMESTIC
EXISTING \V1AOD(PtCA iiot4
YADKIN RIVER
C-TROUT
030701
CALDWELL
MRO
MACK K. WIGGINS
9/19/89
C12SE
Wasteflow (mgd) :
5-Day BOD (mg/1) :
Ammonia Nitrogen (mg/1):
Dissolved Oxygen (mg/1) :
TSS (mg/1) :
Fecal Coliform (#/100m1):
pH (SU) :
Drainage Area (sq mi) : 42.3
Average Flow (cfs) : 63
JR.Summer 7Q10 (cfs) : 13.
Winter 7Q10 (cfs) : 18.
3002 (cfs) :
RECOMMENDED EFFLUENT LIMITS
0.025
30
30
6-9
Upstream (Y/N): N
Downstream (Y/N): N
Location:
Location:
MONITORING
COMMENTS
RECEIVED
wasiON Of ENWt014m NiAI MARAREME:1
OCT 17 1989
1
MOORESVILLE
REGIONAL cosi
E CEiV i ....t
ICI. 2 0 1989
f''tl
THESE LIMITS ARE FOR THE CHANGE IN DISCHARGE POINT TO THE YADKIN RIVER.
Recommended by
Reviewed by:
SV Tech. Support
Supervisor
Regional Supervisor
Permits & Engineering
ca,
Date ///0
Date
Date
Date
RETURN TO TECHNICAL SERVICES BY

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Discharger
Receiving Stream :
MODEL RESULTS
THE PATTERSON SCHOOL
YADKIN RIVER
SUMMER
SECONDARY LIMITS AT NEW
DISCHARGE POINT
The End D.O. is 7.79
The End CBOD is 2.04
The End NBOD is 1.20
mg/1.
mg/1.
mg/1.
Segment 1
Reach 1
DO Min
WLA
CBOD
(mg/1) Milepoint Reach # (mg/1)
7.42
0.00 1
45.00
WLA
NBOD
(mg/1)
WLA
DO Waste Flow
(mg/1) (mgd)
90.00 0.00 0.02500

*** MODEL SUMMARY DATA ***
Discharger
Receiving Stream :
Summer 7Q10
Design Temperature:
THE PATTERSON SCHOOL
YADKIN RIVER
13.
25.
Subbasin : 030701
Stream Class: C-TROUT
Winter 7Q10 : 18.
'LENGTH' SLOPE' VELOCITY 1 DEPTH' Kd I Kd I Ka I Ka I KN I
I mile I ft/mil fps 1 ft 'design' @204 'design' @204 'design'
Segment 1
Reach 1
1 1 I
I 0.801 11.901
1 I I
I I I I I I I
0.411 11.46 10.34 10.27 17.09 I 6.361 0.44 I
I I I I I I I
I Flow CBOD NBOD
I cfs mg/1 mg/1
Segment 1 Reach 1
Waste I 0.039 .45.000 90.000
Headwaters) 13.000 2.000 1.000
Tributary I 0.000 2.000 1.000
* Runoff I 0.310 2.000 1.000
* Runoff flow is in cfs/mile
D.O. I
mg/l I
0.000
7.440
7.440
7.440

I Seg # I Reach
1 1
1 1
1 1
1 1
1 1
1 1
1 1
1 1
1 1
1 1
1 1
I Seg # I Reach
# I Seg Mi
0.00
0.08
0.16
0.24
0.32
0.40
0.48
0.56
0.64
0.72
0.80
Seg Mi
# I
I
I
D.O. I CBOD
7.42 2.13
7.47 2.12
7.52 2.11
7.57 2.10
7.61 2.09
7.65 2.08
7.68 2.08
7.71 2.07
7.74 2.06
7.77 2.05
7.79 2.04
D.O. I CBOD
I
SUMMER
SECONDARY LIMITS AT NEW
DISCHARGE POINT
NBOD I
1.26
1.26
1.25
1.24
1.24
1.23
1.22
1.22
1.21
1.20
1.20
I NBOD
I
Flow I
13.04
13.06
13.09
13.11
13.14
13.16
13.19
13.21
13.24
13.26
13.29
Flow I

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Date: October 12, 1989
NPDES STAFF REPORT AND RECOMMENDATIONS
County: Caldwell ti a 7
7),
NPDES Permit No. NC 0043125� `��`}�
PART I - GENERAL INFORMATION
OCT 201989_,
1. Facility and Address: The Patterson SchooliEt, ,,C, : *Sui�f•U i BRANCH
Route 5, Box 170
Lenoir, North Cartlina 28645
2. Date of Investigation: March 15, 1989; kctober 12, 1989
3. Report Prepared By: Initial Report by Michael L. Parker,
Environmental Engineer II, Current Report by G. T. Chen.
4. Person Contacted: Mr. Michael Bradshaw; telephone number
[phone]. Mr. Larry Dillard and Mr. Leonard Younce
5. Directions to Site: From the junction of Highway 268 and
Highway 321 north of the City of Lenoir, travel northeast on
Highway 268 approximately 4 miles. The school is located
on the left side of Highway 268.
6. Discharge Point -
Existing:
Proposed:
Latitude: 36° 00' 34"
Longitude - 8° 31' 1C"
Latitude: 36° 00' 26"
Longitude: 81° 31' 06"
Attach a USGS Map Extract and indicate treatment plant
and discharge point on map.
site
USGS Quad No.: C 12 SE
7. Size (land available for expansion and upgrading): There is
ample area for any expansion or upgrading if needed.
8. Topography (relationship to flood plain included): Gently
sloping toward the receiving stream (3-5% slopes). Waste-
water treatment facility does not appear to be located in
a flood plain area.
9. Location of nearest dwelling: None within 300 feet.
10. Receiving stream or affected surface waters: Existing:
Barnett Branch; Proposed: Yadkin River
a. Classification: C
b. River Basin and Subbasin No.: Yadkin 030701
c. Describe receiving stream features and pertinent down-
stream uses: Flow observed in receiving stream. No
other dischargers are located on this stream segment.

Page Two
PART II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
1. Type of wastewater: 100o Domestic
a. Volume of Wastewater: 0.025 MGD
b. Types and quantities of industrial wastewater: N/A.
c. Prevalent toxic constituents in wastewater: N/A.
d. Pretreatment Program (POTWs only): N/A.
2. Production Rates (industrial discharges only) in Pounds:
N/A.
3. Description of Industrial Process (for industries only) and
Applicable CFR Part and Subpart: N/A.
4. Type of Treatment (specify whether proposed or existing):
The existing wastewater treatment facilities consist of a
bar screen with a mechanical comminutor, aeration tank,
secondary clarifier and effluent disinfection.
5. Sludge Handling and Disposal Scheme: Sludge is removed as
needed by a septage hauler.
6. Treatment Plant Classification: Class II
7. SIC Code(s): 8211
Wastewater Code(s): 03
PART III OTHER PERTINENT INFORMATION
1. Is this facility being constructed with Construction Grants
Funds (municipal only)? No.
2. Special monitoring requests: N/A.
3. Additional effluent limits requests: N/A.
4. Other: N/A.
PART IV - EVALUATION AND RECOMMENDATIONS
NPDES Discharge Permit No. NC 0043125 was originally issued
to The Patterson School on January 1, 1989 for the operation of
an existing 25,000 GPD wastewater treatment plant off N. C.
Highway 268 in Caldwell County. The facility discharges to
Barnett Branch, a tributary to Yadkin River. A staff report on
the subject facility, dated March 15, 1988, was prepared by
Michael L. Parker of this Office after an inspection of the
facility in connection with permit renewal request.

Page Three
Currently, the Permittee has requested that the existing
discharge point be relocated and that the treated effluent be
discharged directly into Yadkin River without disinfection.
On -site investigation performed by staff of this Office
indicated that the designated receiving water has a strong flow.
An estimated flow at the point of discharge from Cellu Products,
approximately two miles upstream from the proposed is
approximately eight (8) cubic feet per second (summer). Thus,
the dilution ratio (207 to 1) between the receiving stream and
discharge flow would be greater than 67 to 1 which is the minimum
dilution ratio set forth by the State for any discharge without
disinfection.
It is recommended that the Permit modification request be
approved and a new permit with the proposed discharge point and
without disinfection of effluent requirement be issued to
applicant as requested.
-ee
Signature (f Report Preparer.
71/(dae-W4ZA- Water Quality Regional upervisc