NC0021946_Wasteload Allocation_19920514

NPDES DOCIMENT :MCANNINO COVER SHEET
NC0021946
Rosman 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
Return
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Document Date:
May 14, 1992
This document is printed on reuse paper - ignore any
content on the re‘rerse side

NPDES WASTE LOAD ALLOCATION
PERMIT NO.: NC0021946
PERMITTEE NAME:
FACILITY NAME:
Town of Rosman
Rosman WWTP
Facility Status: Existing
Permit Status: Renewal
Major Minor
Pipe No.: 001
Design Capacity: 0.09 MGD
Domestic (% of Flow): 100 %
Industrial (% of Flow):
Comments:
refer: Basinwide / Streamline WLA file
at front of subbasin
RECEIVING STREAM: the French Broad River
Class: WS-III-Trout
Sub -Basin: 04-03-01
Reference USGS Quad: G7NE
County: Transylvania
Regional Office: Asheville Regional Office
(please attach)
Previous Exp. Date: 10/31/92 Treatment Plant Class: class II
Classification changes within three miles:
Change to C-Trout at American Thread Company, Inc.
Requested by: /
Prepared by:
Reviewed • :
Randy Kepler
Date: 3/10/92
Date: 67/379 Z-
tB$)77 Date:
v
Modeler
Date Rec.
#
Drainage Area (mi ) ,' ?, 2' Avg. Streamflow (cfs): 2 9°
7Q10 (cfs) SS,"S' Winter 7Q10 (cfs) 63. 7 30Q2 (cfs) 96.s ---
Toxicity Limits: IWC % Acute/Chronic
Instream Monitoring:
Parameters
Upstream Location
Downstream Location
Effluent
Characteristics
Summer
Winter
BOD5 (mg/1)
.30
NH3-N (mg/1)
r
D.O. (mg/1)
.1r
TSS (mg/1)
3
F. Col. (/100 ml)
zoo
pH (SU)
G _ 9
6e
Y00 crf
...-e
ED
. PLO
Comments:

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RETURN TO TECHNICAL SERVICES BY:
Facility Name:
NPDES No.:
Type of Waste:
Facility Status:
Permit Status:
Receiving Stream:
Stream Classification:
S ubbasin:
County:
Regional Office:
Requestor:
Date of Request:
Topo Quad:
FACT SHEET FOR WASTELOAD ALLOCATION
Rosman WWTP
NC0021946
Domestic - 100%
Existing
Renewal
French Broad River
WSIII- Trout
040301
Transylvania
Asheville
Kepler
3/11/92
G7NE
Request # 6817
Stream Characteristic:
USGS #
Date:
Drainage Area (mi2):
Summer 7Q10 (cfs):
Winter 7Q10 (cfs):
Average Flow (cfs):
30Q2 (cfs):
IWC (%):
67.9
55.5
63.4
240
96.5
0.25
Wasteload Allocation Summary
(approach taken, correspondence with region, EPA, etc.)
Facility requesting renewal of existing NPDES permit. Tech Support recommends renewal of
existing limits.
Speecial,,Schedule Requirements and additional comments from Reviewers:
Recommended by:
Reviewed by
Instream Assessment: Date:
Regional Su v�sor: Q � �"I J `'yam" Date: 3P 9
Date:_4/14/92_
Date:
ngineering: Date:
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2
CONVENTIONAL PARAMETERS
Existing Limits:
Monthly Average ,
Summer Winter
Wasteflow (MGD): 0.09
BOD5 (mg/1): 30
NH3N (mg/1): monitor
DO (mg/1): nr
TSS (mg/1): 30
Fecal Col. (/100 ml): 1000
pH (SU): 6-9
Residual Chlorine (14/1): 800
Oil & Grease (mg/1):
TP (mg/1):
TN (mg/1):
Recommended Limits:
Monthly Average
Summer Winter WQ or EL
Wasteflow (MGD): 0.09
BOD5 (mg/1): 30
NH3N (mg/1): monitor
DO (mg/1): nr
TSS (mg/1): 30
Fecal Col. (/100 ml): 200
pH (SU): 6-9
Residual Chlorine (µg/1): 800
Oil & Grease (mg/1):
TP (mg/1):
TN (mg/1):
Limits Changes Due To: Parameter(s) Affected
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 Fecal Coliform
New facility information
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.
OR
No parameters are water quality limited, but this discharge may affect future allocations.

3
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) _ 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.

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town of rosman wwtp
AMMONIA ANALYSIS
7Q10: 55.5000 cfs
NH3 Effl. Conc: 28.0000 mg/1
AL (1/1.8 mg/1) : 1000.00 ug/1
Upstream NH3 Conc.: 220.0000 ug/1
Design Flow: 0.0900 MGD
Predicted NH3 Downstream: 289.65 ug/1
0.289650 mg/1
NH3 Limit: 311322.5 ug/1
311.3225 mg/1
AMMONIA ANALYSIS (WINTER)
7Q10: 63.4000 cfs
NH3 Effl. Conc: 28.0000 mg/1
AL (1/1.8 mg/1) : 1800.00 ug/1
Upstream NH3 Conc.: 220.0000 ug/1
Design Flow: 0.0900 MGD
Predicted NH3 Downstream: 280.99 ug/1
0.280990 mg/1
NH3 Limit: 719878.8 ug/1
719.8788 mg/1

rosman wwtp
CHLORINE ANALYSIS
7Q10: 55.5000 cfs
CL2 Effl. Conc: 0.5000 mg/1
AL (17/19 ug/1) : 17.0000 ug/1
Upstream CL2 Conc.: 0.0000 ug/1
Design Flow: 0.0900 MGD
Predicted CL2 Downstream: 1.25 ug/1
0.001253 mg/1
CL2 Limit: 6780.440 ug/1
6.780440 mg/1