NC0026913_Wasteload Allocation_19930115

NPDES DOCIMENT SCANNING COVER SHEET
NC0026913
Sparta WWTP
NPDES Permit:
Document Type:
Permit Issuance
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Complete File - Historical
Engineering Alternatives (EAA)
Correspondence
Owner Name Change
Meeting Notes
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Document Date:
January 15, 1993
This document ins pririted on reuwe paper - ignore navy
coritent on the reireriece wide

NPDES WASTE LOAD ALLOCATION
PERMIT NO.: NC0026913
PERMITTEE NAME:
FACILITY NAME:
Robert G. Shaw
Town of Sparta WWTP
Facility Status: Existing
Permit Status: Renewal
Major Minor
Pipe No.: 001
Design Capacity: 0.250 MGD
Domestic (% of Flow): 100 %
Industrial (% of Flow): 0 %
Comments:
RECEIVING STREAM: Little River
Class: C
Sub -Basin: 05-07-03
Reference USGS Quad: B 14NE
(please attach)
County: Alleghany
Regional Office: Winston-Salem Regional Office
Previous Exp. Date: 6/30/93 Treatment Plant Class: II
Classification changes within three miles:
None
10/28/q2_
Requested by: Gre: Nizich Date:'
Prepared by: (- ' )7'_ Date: //?3
Reviewed by: , Date: I
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Modeler
Date Rec.
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Drainage Area (mi2 ) 3 / Avg. Streamflow (cfs):
7Q10 (cfs) /1 Winter 7Q10 (cfs) ,Z3 30Q2 (cfs)
Toxicity Limits: IWC % Acute/Chronic
Instream Monitoring:
Parameters
Upstream Location
Downstream Location
Effluent
Characteristics
Summer
Winter
BOD5 (mg/1)
36
NH3-N (mg/1)
yyyn,,r
D.O. (mg/1)
nr
TSS (mg/1)
3(3
F. Col. (/100 ml)
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pH (SU)
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Comments:

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
Town of Sparta WWTP
NC00269 13
100% Domestic
Existing
Renewal
Little River
C
050703
Alleghany
Winston-Salem
Nizich
10/28/92
B 14NE
Stream Characteristic:
USGS #
Date:
Drainage Area (mi2):
Summer 7Q10 (cfs):
Winter 7Q10 (cfs):
Average Flow (cfs):
30Q2 (cfs):
IWC (%):
Request # 7177
RECEIVED
N.C. Dept. of EHNR
DEC 2 1 1992
Winston-Salem
Regional Office
Cow
DEC 28 1992
WATER QUALITY
SECTION
34
18
23
68
2.1%
Wasteload Allocation Summary
(approach taken, correspondence with region, EPA, etc.)
Facility requesting renewal of NPDES permit. Tech Support recommends renewal of existing
effluent limits. Facility should be sent administrative letter regarding chlorine toxicity.
Special Schedule Requirements and additional comments from Reviewers:
Recommended by _A
2)
Reviewed by
Instream Assessment: fit.. pLko 14.6-v._-
Regional Supervisor: c . ' .---
Permits & Engineering:
Date: 129/92
Date: a 15 r►
Date:
Date:
RETURN TO TECHNICAL SERVICES BY: JAN 1 4 1993

2
Existing Limits:
CONVENTIONAL PARAMETERS
Summer Averages Winter Averages
Monthly Weekly Monthly Weekly
Wasteflow (MGD): 0.250
BOD5 (mg/1): 30
NH3N (mg/1): monitor
DO (mg/1): nr
TSS (mg/1): 30
Fecal Co1. (/100 ml): 1000
pH (SU): 6-9
Residual Chlorine (141): monitor
Temperature (C): monitor
TP (mg/1): monitor
TN (mg/1): monitor
Recommended Limits:
Summer Averages Winter Averages
Monthly Weekly Monthly Weekly WQ or EL
Wasteflow (MGD): 0.250
BOD5 (mg/1): 30 EL
NH3N (mg/1): monitor
DO (mg/1): nr
TSS (mg/1): 30 EL
Fecal Co1. (/100 ml): 200
pH (SU): 6-9
Residual Chlorine (µg/1): monitor
Temperature (C): monitor
TP (mg/1): monitor
TN (mg/1): monitor
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
Parameters) Affected
Fecal Coliform
(explanation of any modifications to past modeling analysis including new flows, rates, field data,
interacting discharges)
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.
OR
X No parameters are water quality limited, but this discharge may affect future allocations.

3
INSTREAM MONITORING REQUIREMENTS
Upstream Location:
Downstream Location:
Parameters:
Special instream monitoring locations or monitoring frequencies:
MISCELLANEOUS INFORMATION & SPECIAL CONDITIONS
Adequacy of Existing Treatment
Has the facility demotrated 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 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.

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Sparta wwtp
AMMONIA ANALYSIS
7Q10: 18.0000 cfs
NH3 Effl. Conc: 32.6000 mg/1
AL (1/1.8 mg/1): 1000.00 ug/1
Upstream NH3 Conc.: 220.0000 ug/1
Design Flow: 0.2500 MGD
Predicted NH3 Downstream: 902.38 ug/1
0.902370 mg/1
NH3 Limit: 3723 2.25 ug/1
37.23225 mg/I.
AMMONIA ANALYSIS (WINTER)
7Q10: 32.0000 cfs
NH3 Effl. Conc: 32.6000 mg/1
Al (1/ 1 . 8 mg/I): 1800.00 ug/1
Upstream NH3 Conc.: 220.0000 ug/1
Design Flow: 0.2500 MGD
Predicted NH3 Downstream: 607.41 ug/1
0,607410 mg/1
NH3 Limit: 132277.4 ug/1
132.2774 mg/1
S p a r t a wwtp
CHLORINE ANALYSIS
7Q10: 18.0000 cfs
CL2 Effl. Conc: 1.2000 mg/1
AL (17/19 ug/1): 17.0000 ug/1
Upstream CL2 Conc.: 0.0000 ug/1
Design Flow: 0.2500 MGD
Predicted CL2 Downstream: 25.29 ug/1
0.025288 mg/1
CL2 Limit: 806.6774 ug/1
0.806677 mg/1