NC0040908_Wasteload Allocation_19960425

NPDES DOCUMENT SCANNING: COVER SHEET
mMI
01.1
Amer
IWO
INN
NC0040908
Tabernacle Elementary School
NPDES Permit:
Document Type:
Permit Issuance
Wasteload
Allocation
Authorization to Construct (AtC)
Permit Modification
Speculative Limits
Complete File - Historical
Instream Assessment (67B)
Environmental Assessment (EA)
Permit
History
Document Date:
April 25, 1996
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content on the rezrerse ,etiide

NPDES WASTE LOAD ALLOCATION
PERMIT NO.: NC0040908
PERMI 1"1'1 E NAME:
FACILITY NAME:
Facility Status:
Permit Status:
Major
Randolph County Schools
Tabernacle Elementary School
Existing
orlifteation Te/o(/;9- i// xpa45, ,-n.-
Minor '\/
Pipe No.: 001
Design Capacity: 0.0045 MGD (FF.01 PIO)
Domestic (% of Flow): 100 %
Industrial (% of Flow):
Comments:
School; the modification entails moving the outfall from Uwharrie
River to Caraway Creek.
RECEIVING STREAM:Caraway Creek @ intersection of I-IWY 64
Class: C
Sub -Basin: 03-07-09
Reference USGS Quad: E19NW, Farmer (please attach)
County: Randolph
Regional Office: Winston-Salem Regional Office
Previous Exp. Date: 2/28/97 Treatment Plant Class: I
Classification changes within three miles:
Requested by: Mark McIntire
Prepared by: ,sized /f%
7.tte
Date: 2/21/96
Date:
Reviewed by: Date:
kik D. 001/"AIEI�
`EL '` Z S 496 __
---(
©.0/ ti2t,p
Modeler
Date Rec.
#
a‘`i\k
alZZ\9c,
(g-\49
Drainage Area (mil ) 3 9 Avg. Streamflow (cfs): 1
7Q 10 (cfs) 0,6 Winter 7Q10 (cfs) a , 30Q2 (cfs) 2,
Toxicity Limits: IWC , % O.O/M6p Acute/Chronic
Instream Monitoring:
Parameters
Upstream Location
Downstream Location
Wasteflow (MGD):
BOD5 (mg/1):
NH3N (mg/1):
DO (me):
TSS (mg/1):
Fecal Col. (/100 ml):
pH (SU):
Temperature:
Residual Chlorine (4/1):
Monthly Average
Summer & WQ or EL
Winter
0.0045
30.0 EL
monitor EL
monitor
30.0 EL
200 EL
6-9
monitor
28 EL
Monthly Average
Summer & WQ or EL
Winter
0.01
30.0 EL
monitor EL
monitor
30.0 EL
200 EL
6-9
monitor
28 EL

ROAD CLASSIFICATION
PRIMARY HWY
HARD SURFACE
LIGHT -DUTY ROAD, HARD OR
IMPROVED SURFACE
SECONDARY HWY
HARD SURFACE =CI UNIMPROVED ROAD..... - - =
Tabernacle Elem. School
NC0040908
Randolph County
Tablet Chlorination Unit
f
N
SCALE 1 :24 000
0
1 MILE
vviPJi}]:diMv�-'^�LaR
Qpppppq)oyy�(ygp}Jyii?:
0 7000 FEET
1 0 1 KILOMETER
CONTOUR INTERVAL 5 FEET
Farmer Quadrangle
North Carolina
7.5 minute series

GUIDANCE FOR EVALUATION OF WASTEWATER DISPOSAL ALTERNATIVES
Proposed Discharge
I. General Information
A. Facility name: Tabernacle School
County: Randolph County
Facility Address: 4901 Tabernacle School Road, Asheboro, NC
Report Preparer's Name & PE#: Ray E. Morgan, PE - NC 3494
Preparer's Address: Buffaloe, Morgan & Associates, Inc.
1115 Lake Wheeler Road
Raleigh, NC 27603-2263
919-833-1927
B. On site treatment facilities consist of a 12,000 gallon septic tank, a 12,000 gallon dosing
tank, recirculating sand filter bed, pump tank, ultraviolet bacteriological sterilizer and
approximately 2-1/2 miles of forced main. Plans for the project are attached.
C. The project is an 800 student elementary school with cooking but no locker room
facilities. Total waste contribution is 10,000 gallons/day.
D. The project is not a phased development.
IL Evalration of Enviromental Feasibility of Discharge Alternatives
A. 1 (a) There is no sanitary sewerage system within a 5 mile radius of the site.
1 (b) No sanitary sewerage collection system is projected within a 5 mile radius of the
site.
2. The site was evaluated by a representative of the Division of Environmental
Management, Mr. Corey Basinger in conjunction with the engineer. Soil
conditions are extremely poor and there is insufficient usable land for any type of
on site disposable system. No adjacent land is available.
3. The permittee does not currently own land adequate for a spray irrigation system.
Adjacent property cannot be obtained.
C. 1. Distance to the nearest stream, Caraway Creek, is approximately 2-1/2 miles. A
North Carolina highway map is attached.
2.
No third parties are required for agreement as the forced main will be run on the
right of way of US 64.

Facility Name:
NPDES No.:
Type of Waste:
Facility Status:
Permit Status:
Receiving Stream:
Stream Classification:
Subbasin:
County:
Regional Office:
Requester:
Date of Request:
Topo Quad:
FACT SHEET FOR WASTELOAD ALLOCATION
Tabernacle Elementary School
NC0040908
Domestic - 100%
Existing
Relocation/expansion
Caraway Creek
C
03-07-09
Randolph
Winston-Salem
Mark McIntire
2/21/96
E19NW
Wasteload Allocation Summary
(approach taken, correspondence with region, EPA, etc.)
Request #8449 e D
n
Stream Characteristic:
USGS #
Date:
Drainage Area (mi2):
Summer 7Q10 (cfs):
Winter 7Q10 (cfs):
Average Flow (cfs):
30Q2 (cfs):
IWC (%):
2 8 1996
see below
39
0.6
2.6
35.1
4.3
2.5% at
QwJ 1MGD
The facility is relocating its outfall from a UT to the Uwharrie River to Caraway Creek. Irri_ _'_`
addition, the facility has applied for an expansion from 0.0045 MGD to 0.01 MGD. Modelirzg �-
results indicate that Caraway Creek has ample assimilative capacity to handle the 0.01 MGD
discharge at secondary limits.
Stream flow estimates based on yield calculations from low flow partial record station
#0212330000 on Caraway Creek.
Special Schedule Requirements and additional comments from Reviewers:
Goo45 DIG — ..Prc j (cn(54?- -cam)
Recommended by: doh?.)/�'�!�l�jC/� Date: 3
Reviewed by
Instream Assessment: l/YlG
Regional Supervisor: -�f1-4,
Permits & Engineering:
RETURN TO TECHNICAL SUPPORT BY:
Date: 3(aa 1 C y
Date:
Date: ¥( 7/%
2 1
a'r' K c: L

2
CONVENTIONAL PARAMETERS
existing Limits at UT to Uwharrie River:
Wasteflow (MGD):
BOD5 (mg/1):
NH3N (mg/1):
DO (mg/1):
TSS (mg/1):
Fecal Col. (/100 ml):
pH (SU):;
Residual Chlorine (14/1):
Temperature:
Monthly Average Monthly Average
Summer Summer Winter
and Winter
0.0045 0.0045 0.0045
16.0 5.0 10.0
4.0 1.0 1.8
6.0 * 6.0 * 6.0 *
30.0 30.0 30.0
200 200 200
6-9 6-9 6-9
monitor 17.0 ** 17.0 **
monitor monitor monitor
* Daily average.
** Daily Oax.
The advanced tertiary summer/winter limits become effective September 1, 1996.
Recommended Limits at Caraway Creek:
Wasteflow (MGD):
BOD5 (mg/1):
NH3N (mg/1):
DO (mg/1):
TSS (mg/1):
Fecal Col! (/100 ml):
pH (SU):
Temperature:
Residual chlorine (14/1):
Limit changes due to:
Monthly Average
Summer & WQ or EL
Winter
0.0045
30.0 EL
monitor EL
monitor
30.0 EL
200 EL
6-9
monitor
28 EL
Monthly Average
Summer & WQ or EL
Winter
0.01
30.0 EL
monitor EL
monitor
30.0 EL
200 EL
6-9
monitor
28 EL
Limit changes reflect the increased assimilative capacity of Caraway Creek as opposed to the
current receiving stream, UT to Uwharrie River.
Since the facility will be utilizing UV disinfection monitoring for residual chlorine should only be
required when chlorine is used.
Parameter(s) are water quality limited. For some parameters, the available load capacity of
the immediate receiving water will be consumed. This may affect future water quality based
effluent lunitations for additional dischargers within this portion of the watershed.
OR
No parameters are water quality limited, but this discharge may affect future allocations.

3
INSTREAM MONITORING REQUIREMENTS
Upstream Location: N/A
Downstream Location: N/A
Parameters: N/A
Special instream monitoring locations or monitoring frequencies:
MISCELLANEOUS INFORMATION & SPECIAL CONDITIONS
Adequacy of Existing Treatment
Has the facility demonstrated the ability to meet the proposed new limits with existing treatment
facilities? Yes No
If
no, which parameters cannot be met?
Would a "phasing in" of the new limits be appropriate? Yes No
If yes, please provide a schedule (and basis for that schedule) with the regional
office recommendations:
If no, why not?
Special Instructions or Conditions
Wasteload sent to EPA? (Major) (Y or N)
(If yes, then attach updated evaluation of facility, including toxics spreadsheet, modeling analysis
if modeled at renewal, and description of how it fits into basinwide plan)
Additional Information attached? (Y or N) If yes, explain with attachments.

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3/19/96
AHM
Facility name: Tabernacle Elementary School
Dist Cum. Dist. Elevation Slope
0 0.00 440 Leave blankl
1.7 1.70 430 5.88
1.7 3.40 420 5.88
1.8 5.20 410 5.56
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Tabernacle Elementary School
Caraway Creek
NC0040908
Qw=0.0045 MGD
Residual Chlorine
7Q10 (CFS)
DESIGN FLOW (MGD)
DESIGN FLOW (CFS)
STREAM STD (UG/L)
UPS BACKGROUND LEVEL (UG/L)
IWC (%)
Allowable Concentration (ug/I)
Fecal Limit
Ratio of 87.02 :1
0.6
0.0045
0.006975
17.0
Ammonia as NH3
(summer)
S7Q10 (CFS)
DESIGN FLOW (MGD)
DESIGN FLOW (CFS)
STREAM STD (MG/L)
0.6
0.0045
0.006975
1.0
0 UPS BACKGROUND LEVEL (MG/L) 0.22
1.15 % IWC (%) 1.1 %
1479 Allowable Concentration (mg/I) 68.10
NBOD (mg/I) = 306.44
200/100m1
Ammonia as NH3
(winter)
W7Q10 (CFS)
DESIGN FLOW (MGD)
DESIGN FLOW (CFS)
STREAM STD (MG/L)
UPS BACKGROUND LEVEL (MG/L)
IWC (%)
Allowable Concentration (mg/I)
2.6
0.0045
0.006975
1.8
0.22
0.3 %
590.76
NBOD (mg/I) = 2658.42
3/21/96

Tabernacle Elementary School
Caraway Creek
NC0040908
Qw=0.01 MGD
Residual Chlorine
7Q10 (CFS)
DESIGN FLOW (MGD)
DESIGN FLOW (CFS)
STREAM STD (UG/L)
UPS BACKGROUND LEVEL (UG/L)
IWC (%)
Allowable Concentration (ug/1)
Fecal Limit
Ratio of 39.71 :1
Ammonia as NH3
(summer)
0.6 S7Q10 (CFS)
0.01 DESIGN FLOW (MGD)
0.0155 DESIGN FLOW (CFS)
17.0 STREAM STD (MG/L)
0 UPS BACKGROUND LEVEL (MG/L)
2.52 % IWC (%)
675 Allowable Concentration (mg/1)
200/100ml
Ammonia as NH3
(winter)
0.6
0.01
0.0155
1.0
0.22
2.5 %
31.19
NBOD (mg/I) = 140.37
W7Q10 (CFS)
DESIGN FLOW (MGD)
DESIGN FLOW (CFS)
STREAM STD (MG/L)
UPS BACKGROUND LEVEL (MG/L)
IWC (%)
Allowable Concentration (mg/I)
2.6
0.01
0.0155
1.8
0.22
0.6 %
266.83
NBOD (mg/I) = 1200.75
3/21 /96

MODEL INPUTS FOR LEVEL B ANALYSIS
GENERAL INFORMATION
Facility Name: 7fna ffw?
c--
NPDES No.: A/C °PIO 70 V
Type of Waste: f p 7,, (km
Facility Status: ft/et typi.
Receiving Stream: tiwow C4,
Stream Classification: C.--
Subbasin: 0 1 °
County:
Regional Office: /4/5/k 0
Topo Quad: 6.11 kJ 0
FLOW INFORMATION
USGS #
Date of Flow Estimates:
Drainage Area (mi2): 7
Summer 7Q10 (cfs):
Winter 7Q10 (cfs): 2_, ,
Average Flow (cfs): 35, /
30Q2 (cfs): I-. 3
IWC at Point of Discharge (%): Z, 5 2
Cummulative IWC (%):
-ON' 4p....ONON.,,.i.:::::000.*:.4".4:40%116;PNOMPIA,,,.4* XeMk:Matiba:Ogagpge.A'Agt
MODEL INPUT INFORMATION
LENGTH OF REACH (miles)
q
INCREMENTAL LENGTH (miles)
8, /
WASTE CHARACTERISTICS
FLOW (MGD)
CBOD (mg/1)
NBOD (mg/1)
D.O. (mg/1)
RUNOFF CHARACTERISTICS
7Q10 (cfs/mi2)
a 0Y 2-
QA (cfs/mi2)
41// 7
CBOD (mg/1)
/20 t
NBOD (mg/1)
ii
D.O. (mg/1)
TRIBUTARY CHARACTERISTICS
7Q10 (cfs)
QA (cfs)
CBOD (mg/1)
NBOD (mg/I)
D.O. (mg/1)
SLOPE (fpm)
Name of facility /a effnal

MODEL RESULTS
SUMMER
QW=0.01 MGD
Discharger : TABERNACLE ELEMENTARY SCHOOL
Receiving Stream | : CARAWAY CREEK
The End D.O. is 7.26 mg/l.
The End CBOD is 0.61 mg/l.
The End NBOD is 0.18 mg/l.
____________________________________________________________________
WLA WLA WLA
DO Min CBOD NBOD DO Waste Flow
(mg/l) Milepoint Reach # (mg/l) (mg/l) (mg/l) (mgd)
-----------
Segment 1 5.96 1.20 1
Reach 1 45.00 90.00 0.00 0.01000

*** MODEL SUMMARY DATA ***
Discharger : TABERNACLE ELEMENTARY GCHOOLSubbasin x 030709
Receiving Stream : CARAWAY CREEK Stream Class: C
Summer 7Q10 o 0.6 Winter 7010 : 2.6
Design Temperature: 26"0
|LCNGTH| SLUPE| VE
| mile \ ft/mi/
I
0%TY | DEPTH| KU \ Kd \ Ka I Ka I KN | KN | KNO } KNR | GU8 } SOD |
fps } ft |des\gn| a201 Nesian} @201 /design| @201 |design| 9201 |dsion} a201 >
i I | | | I | ) I I } | \ / }
Segment l | 4.801 5.801 0"045 \ 1.03 } 0.27 | 0.21 i 0.53 } 0.471 0.48 | 0.30 1 0,48 } 0.00 } 0,00 } 0.00 }
Reach 1 | I / \ | | } } | | | I |
| Flow | CBOD | NBOD | D.O. |
| cfs } mg/l I ' mg/1 } mg/l |
S t 1 Reach 1
Waste | 0.015 1 45.000 } 90"000 1 0.000
Headw,Iters| 0"600 \ 2.000 | 1.000 i 7.300
Tribu ary 1 0.000 | 2"000 | 1.000 > 7.300
* Ruin °ff | 0.042 | 2.000 \ 1.000 | 7.300
* RuIoff flow is in cfs/mile

Discharcu r
Rc ceiwinc Stream
Summer 7010
*** MODEL SUMMARY DATA • **
W TABERNACLE ELEMENTARY SCHOOLSubbas i n
CARAWAY CREEK Stream Class:
a 0.6 Winter MO u
Design Temperature: 26.0
n 030709
C
2.6
. 6
11ENGTHI SLOPE! VELOCITY 1 DEPTH! Kd I Kd 1 Ka 1 Ka 1 KN 1 KN 1 KNR I KNR 1 SOD 1 SOD 1
1 mile 1 ft/mil fps 1 ft 'design! W0° 'design' moo Idesignl S20° ldesignl 080° !design' Z20° I
I 1 1 1 1 1 1 I 1 1 1 1
Segment 1 1 4.801 5.801 .045 1 1.03 1 0.27 1 0.21 10.53 1 0.471 0.48 10.30 1 0.48 1 0.00 1 0.00 1 0.00 1
Reach 1 1 1 1 1 1 I 1 I 1 1 1 I 1 I
Segment 1
Waste I
Headw terss 1
Tr ibutlary
* Runoff I
* Rur
I Flow
1 cfs
Reach 1
0.015
0.600
0.000
0u042
1 CBOD 1 NBOD
I ma/1 1 mg/1
1
1
1
1
455.00i i
2.000
2.000
2.000
1
1
1
1
cuff flaw is in cfss/mil e
90.000
1.000
1.000
1.000
D.O. 1
mg/ 1 I
0.000
7.300
7.300
7.300