NC0066991_Wasteload Allocation_19911107

NPDES WASTE LOAD ALLOCATION
PERMIT NO.: NCO066991
PERMITTEE NAME: Watauga County Board of Education
FACILITY NAME: Bethel Elementary School
Facility Status: Existing
Permit Status: Renewal
Major
Pipe No.: 001
Minor �1
Design Capacity: 0.0065 MGD
Domestic (% of Flow): 100 %
Industrial (% of Flow):
Comments:
Refer : Basinwide / Streamline WLA File
Completed By Permits & Engineering
At Front Of Subbasin
RECEIVING STREAM: Beaverdam Creek
Class: C-Trout
Sub -Basin: 04-02-01
Reference USGS Quad: B11SE (please attach)
County: Watauga
Regional Office: Winston-Salem Regional Office
Previous Exp. Date: 2/29/92 Treatment Plant Class: 1
Classification changes within three miles:
No change within three miles.
Requested by: Mack Wiggins
Prepared by:
Reviewed °
�oflw � s
Date: 9/3/91
Date: 11 S
Date:
Modeler Date Rec. #
ql
Drainage Area (mil) 13 Avg. Streamflow (cfs): .�6
7Q10 (efs) 07 -Z Winter 7Q10 (cfs) I25 30Q2 (efs) S. 6
Toxicity Limits: IWC o yS % Acute/Chronic
Instream Monitoring:
Parameters /E '
Upstream i Location Qe
Downstream Y Location^'S'a'
Effluent
Characteristics
Summer
�V i n per
BOD5 (mg/1)
3o
NE3-N (mg/1)
D.O. (mg/1)
4,ti
TSS (mg/1)
jo
F. Col. (/100 ml)
PH (SU)
-Z,
K—�
Comments:
07

RE('FIM
N.C. Depi. NRC®
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:
FACT SHEET FOR WASTELOAD ALLOCATION
Bethel Elementary School
NCO066991
Domestic - 100%
Existing
Renewal
Beaverdam Creek
C = vzut-
040201
Watauga
WSRO
Wiggins
9/3/91
B11SE
Request #
1
i
0424
E
Stream Characteristic:
USGS #
Date:
Drainage Area (mi2):
Summer 7Q10 (cfs):
Winter 7Q10 (cfs):
Average Flow (cfs):
30Q2 (cfs):
IWC (%):
OCT 2 2 1Q41
Winston-Salem
Regional Office
13
2.2
3.25
26
5.6
Wasteload Allocation Summary
(approach taken, correspondence with region, EPA, etc.)
Facility requesting renewal of existing permit. *Interim dilution ratio indicates that facility should
monitor for fecal coliform: effluent, upstream, and downstream to determine whether instream
problems. Facility may be given limits in the future. AaJ-
Special Schedule Requirements and additional comments from Reviewers:
Recommended by:
10/14/91
Reviewed by
Instream Assessment: Date: / IS 5
Regional Supervisor:
Permits & Engineering:
RETURN TO TECHNICAL SERVICES BY: NOV Z 3 rv.1 l
I W-M a

2
Existing Limits:
Wasteflow (MGD):
BOD5 (mg/1):
NH3N (mg/1):
DO (mg/1):
TSS (mg/1):
Fecal Col. (/100 ml):
pH (SU):
Residual Chlorine (µg/l):
Oil & Grease (mg/1):
TP (mg/1):
TN (mg/1):
Recommended Limits:
Wasteflow (MGD):
BOD5 (mg/1):
NH3N (mg/1):
DO (mg/1):
TSS (mg/1):
Fecal Col. (/100 ml):
pH (SU):
Residual Chlorine (µg/1):
Oil & Grease (mg/1):
TP (mg/1):
TN (mg/1):
CONVENTIONAL PARAMETERS
Monthly Average
Summer Winter
0.0065
30
nr
nr
30
nr
nr
Monthly Average
Summer Winter
0.0065
30
nr
nr
30
nr
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Limits Changes Due To:
Change in 7Q10 data
Change in stream classification
Relocation of discharge
Change in wasteflow
Other (onsite toxicity study, interaction, etc.)
Instream data
New regulations/standards/procedures
New facility information
Parameter(s) Affected
_X_ 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 limitations for additional dischargers within this portion of the watershed.
•'
No parameters are water quality limited, but this discharge may affect future allocations.
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MISCELLANEOUS INFORMATION & SPECIAL CONDITIONS
AAd .4uacv 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) _N_ (Y or N)
(If yes, then attach schematic, toxics spreadsheet, copy of model, or, if not modeled, then old
assumptions that were made, and description of how it fits into basinwide plan)
Additional Information attached? (Y or N) If yes, explain with attachments.

bethel elementary school
AMMONIA ANALYSIS
7Q10: 1.4000 cfs
NH3 Effl. Conc: 1.6000 mg/l
AL (1/1.8 mg/1): 1000.00 ug/l
Upstream NH3 Conc.: 220.0000 ug/1
Design Flow: 0.0065 MGD
Predicted NH3 Downstream: 229.86 ug/l
0.229860 mg/l
NH3 Limit: 109387.0 ug/l
109.3870 mg/l
AMMONIA ANALYSIS
7Q10: 1.6000 cfs
NH3 Effl. Conc: 1.6000 mg/l
AL (1/1.8 mg/1): 1800.00 ug/l
Upstream NH3 Conc.: 220.0000 ug/l
Design Flow: 0.0065 MGD
Predicted NH3 Downstream: 228.64 ug/l
0.228635 mg/l
NH3 Limit: 252718.1 ug/l
252.7181 mg/l
(WINTER)

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bethel elementary school
AMMONIA ANALYSIS
7Q10: 2.2000 cfs
NH3 Effl. Conc: 1.6000 mg/1
AL (1/1.8 mg/1): 1000.00 ug/1
Upstream NH3 Conc.: 220.0000 ug/l
Design Flow: 0.0065 MGD
Predicted NH3 Downstream: 226.29 ug/1
0.226290 mg/l
NH3 Limit: 171322.5 ug/1
171.3225 mg/1
AMMONIA ANALYSIS (WINTER)
7Q10: 3.2500 cfs
NH3 Effl. Conc: 1.6000 mg/l
AL (1/1.8 mg/1): 1800.00 ug/1
Upstream NH3 Conc.: 220.0000 ug/1
Design Flow: 0.0065 MGD
Predicted NH3 Downstream: 224.26 ug/1
0.224264 mg/1
NH3 Limit: 511477.4 ug/1
511.4774 mg/1