NC0022900_Wasteload Allocation_19920902

Refer : Basinwide / Streamline WLA File
Completed By Permits & Engineering
At Front Of Subbasin
PERMIT NO.: NCO022900
PERMITTEE NAME: Carolina Water Service
FACILITY NAME: Sugar Mountain Utilities
Facility Status: Existing
Permit Status: Renewal
Major Minor
Pipe No.: 001
Design Capacity: o, soo MGD
Domestic (% of Flow): 100%
Industrial (% of Flow): 0%
Comments:
* Modified to two steps of dischar eg limit,
STREAM INDEX: 8-22-2
RECEIVING STREAM: Flattop Creek
Class: C
Sub -Basin: 04-02-01
NPDES WASTE LOAD ALLOCATION
Reference USGS Quad: C11NE, Valle Crucis (please attach)
County: Avery
Regional Office:
Previous Exp. Date: 9/30/92 Treatment Plant Class: II
Classification changes within three miles:
ca 1.3 mi Elk River chases to C -Tr (cry Swar Creek.
Requested by:
Prepared by:
Jule Shanklin
Reviewed ', 2P -0/A . 0%/44..1 I �
.►, W
Date: 9/2/92
Date: li�/z 9Z
Date: I
�l �3�9
Modeler
Date Rec.
#
BODS (m )
-2
o9So-
L
Drainage Area (mi ) 0. 9� Avg. Streamflow (cfs): a.o
7Q10 (cfs) 0.3 Winter 7Q10 (cfs) o. 4 30Q2 (cfs)
Toxicity Limits: IWC 7� % Acute hrZ orae
Instream Monitoring:
Parameters
Upstream Locations'/00 • 44k -
Downstream Y Location ,u Q /91`
Effluent
Characteristics
Summer
Winter
BODS (m )
-2
30
NH3-N(mg/1)
jZ (Wye)vriw,
r (a✓
D.O. (mg/1)
/
TSS (mg/1)
30
3
F. Col. (/100 ml)
266
zoo
pH (SU)
- 9
U�
Comments:

I1
�i \t
I U0
AtIdId / ; 1\� an • �� reek
. Nanalnapack Chace
00
15
G0 . i
�
��,/ � -, 11 •} �� � � /; `—tom / , // �/
\\ � �• .� •\ \ \ 1200 �� \\ ///�� `��
V v 11• \\ \ , 1
8800•1
\ /
\ i ��� ) j���
FEET~
� �;� it / I � •_•• • T- j•• { I.�- /y—��,/p�/�/�
oit
1.UJ ,000
�V A
36°07'30'
. r / i
--
81°52'30' 422 0 8 Mt TO '4OR7M CARGLINA toy 1 160000 FEET
50'
N
ROAD CLASSIFICATION
SCALE 1:24 000
PRIMARY HIGHWAY LIGHT-DUTY ROAD HARD OR
HARD SURFACE IMPROVED SURFACE
0 1 MILE
SECONDARY HIGHWAY
HARD SURFACE ® UNIMPROVED ROAD
0 7000 FEET
1 0 1 KILOMETER
Latitude: 36008'1011 Longitude: 81'51'04"--
Map # C11 NE Sub -basin 040201
CONTOUR INTERVAL 40 FEET
Stream Class C
Discharge Class 06 -Domestic
QUAD LOCATION Carolina Water Service
Sugar Mountain
Creek
Receiving Stream Flattop
NCO022900
Permit exp. 09/30/2002 Qw 0.05/ 1.0 MCD
Avery County

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
Sugar Mountain Utilities WWTP
NCO022900
100% Domestic
Existing
Renewal
Flattop Creek
C
040201
Avery
Asheville
Shanklin
9/4/92
C11NE
Request # 7095 ,1,
Stream Characteristic:
USGS #
Date:
Drainage Area (mi2):
0.86
Summer 7Q10 (cfs):
0.3
Winter 7Q10 (cfs):
0.4
Average Flow (cfs):
2.0
30Q2 (cfs):
0.6
IWC M:
72
Wasteload Allocation Summary
(approach taken, correspondence with region, EPA, etc.)
Facility requesting renewal of existing NPDES permit. Sugar Mt. requested expansion to 1.0
MGD from 0.5 MGD in '90. Will recommend limits for both wasteflows, 0.500 and 1.0 MGD.
Requirements and additional comments from Reviewers:
Recommended by: /� • 1)�Date:
Reviewed by /I/ n 117�1
Instream Assessment:
Regional Supd�pl
Permits & Engineerin
10/15/92
/-/ 11/1 L
b 1 Id, a-
16
RETURN TO TECHNICAL SERVICES BY: NOV 2 O 1992
R,ECEiV D
Water Qutliiy Seddon
OCT ? 7 4092
;bheville Regional 011e
,"twills, North Carc*

2
CONVENTIONAL PARAMETERS
Existine Limits:
Recommended Limits:
Monthly Average
Summer
Winter
Wasteflow (MGD):
0.500
0.500
BOD5 (mg/1):
30
30
NH3N (mg/1):
12
monitor
DO (mg/1):
6.0
1.0
TSS (mg/1):
30
30
Fecal Col. (/100 ml):
200
200
pH (SU):
6-9
6-9
Residual Chlorine (µg/1):
monitor
monitor
TP (mg/1):
monitor
monitor
TN (mg/1):
monitor
monitor
Recommended Limits:
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
(explanation of any modifications to past modeling analysis including new flows, rates, field data,
interacting discharges)
(See page 4 for miscellaneous and special conditions, if applicable)
Monthly Average
Summer
Winter
WQ or EL
Wasteflow (MGD):
0.500
0.500
BODS (mg/1):
30
30
WQ
NH3N (mg/1):
12
monitor
WQ
DO (mg/1):
6.0
1.0
W
TSS (mg/1):
30
30
Fecal Col. (/100 ml):
200
200
pH (SU):
6-9
6-9
Residual Chlorine (µg/1):
v? Y
AV
TP (mg/1):
monitor
monitor
TN (mg/1):
monitor
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
Parameter(s) Affected
(explanation of any modifications to past modeling analysis including new flows, rates, field data,
interacting discharges)
(See page 4 for miscellaneous and special conditions, if applicable)

TOXICS/METALS
Type of Toxicity Test: CHRONIC PASS/FAEL QRTRLY
Existing Limit: 72%
Recommended Limit: 72%
Monitoring Schedule: JAN APR JUL OCT
ExistingLimits
imits
Daily Max.
COD (mg/):
Cadmium (ug/1):
Chromium (ug/1):
Copper (ug/1):
Nickel (ug/1):
Lead (ug/1):
Zinc (ugh):
Cyanide (ug(1):
Phenols (ug/1):
Mercury (ug/1):
Silver (ug/1):
Recommended Limits
Daily Max. WQ or EL
COD (mg/):
Cadmium (ug/1):
Chromium (ug/1):
Copper (ug/1):
Nickel (ug/1):
Lead (ug/1):
Zinc (ug/1):
Cyanide (ug/1):
Phenols (ug/1):
Mercury (ug/1):
Silver (ug/1):
Limits Changes Due To: Parameter(s) Affected
Change in 7Q10 data
Change in stream classification
Relocation of discharge
Change in wasteflow
New pretreatment information s
Failing toxicity test
Other (onsite toxicity study, interaction, etc.)
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.

4
INSTREAM MONITORING REQUIREMENTS
Upstream Location: 100 ft. above discharge
Downstream Location: Elk River @ Hwy 194
Parameters: Temperaure, DO, conductivity,fecal coliform
Special instream monitoring locations or monitoring frequencies:
MISCT LANEOUS INFORMATION & SPECIAL CONDITIONS
A ftuacy 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 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.

Facility Name Nlfl �'(/��1� GVW Permit #
Atn 229 do
Pipe # o
CHRONIC TOXICITY PASS/FAIL PERMIT LIMIT (QRTRLY)
The effluent discharge shall at no time exhibit chronic toxicity using test procedures outlined in:
1.) The North Carolina Ceriodaphnia chronic effluent bioassay procedure (North Carolina Chronic Bioassay
Procedure - Revised *September 1989) or subsequent versions.
The effluent concentration at which there may be no observable inhibition of reproduction or significant mortality
is ';�4 % (defined as treatment two in the North Carolina procedure document). The permit holder shall perform
1quailcrA monitoring using this procedure to establish compliance with the permit condition. The first test will be
performed after thirty days from the effective date of this permit during the months of
T,'✓ .1-V /_ o C7' . Effluent sampling for this testing shall be performed at the NPDES
permitted final effluent discharge below all treatment processes.
All toxicity testing results required as part of this permit condition will be entered on the Effluent Discharge
Monitoring Form (MR -1) for the month in which it was performed, using the parameter code TGP3B.
Additionally, DEM Form AT -1 (original) is to be sent to the following address:
Attention: Environmental Sciences Branch
North Carolina Division of
Environmental Management
4401 Reedy Creek Road
Raleigh, N.C. 27607
Test data shall be complete and accurate and include all supporting chemical/physical measurements performed in
association with the toxicity tests, as well as all dose/response data. Total residual chlorine of the effluent toxicity
sample must be measured and reported if chlorine is employed for disinfection of the waste stream.
Should any single quarterly monitoring indicate a failure to meet specified limits, then monthly monitoring will
begin immediately until such time that a single test is passed. Upon passing, this monthly test requirement will
revert to quarterly in the months specified above.
Should any test data from this monitoring requirement or tests performed by the North Carolina Division of
Environmental Management indicate potential impacts to the receiving stream, this permit may be re -opened and
modified to include alternate monitoring requirements or limits.
NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control organism
survival and appropriate environmental controls, shall constitute an invalid test and will require immediate
retesting(within 30 days of initial monitoring event). Failure to submit suitable test results will constitute
noncompliance with monitoring requirements.
7Q10 &S cfs
Permitted Flow 6.s6c MGD
IWC 7A %
Basin & Sub -basin Ward
Receiving Stream F/affop CrE
County
QCL PIF Version 9191