HomeMy WebLinkAboutNC0020567_Wasteload Allocation_19930524NPDE S DOCUWENT SCANNIMS COVER SHEET
NPDES Permit: NC0020567
Elkin WWTP
Document Type: Permit Issuance
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Speculative Limits
Correspondence
Re:
Instream Assessment (67B)
Environmental Assessment (EA)
Permit
History
Document Date: May 24, 1993
M%Iga document I= priRItea o2 uae paper. - iJP2-orc any
content orx the re-sreree Bide
NPDES WASTE LOAD ALLOCATION
PERMIT NO.: NCO0205 b7
PERMIZTEE NAME: Town of Elkin
FACILITY NAME: Town of Elkin WWTP
Facility Status: Existing
Permit Status: Renewal
Major Minor
Pipe No.: 001
Design Capacity: d$? MGD �, C� M4 r)
Domestic (% of Flow): 100 %
Industrial (% of Flow): 0 %
Comments:
expand to 1.0 MGD once facilities are constructed. The construction is
scheduled to be complete in Sel2tember of 1993. They have been dr oppe-�-
prc, arc u•rYc ►.-� vu,
RECEIVING STREAM: the Yadkin River
Class: C
Sub -Basin: 03-07-02
Reference USGS Quad: C15NE (please attach)
County: Ste'
Regional Office: Winston-Salem Regional Office
Previous Exp. Date: 9/30/93 Treatment Plant Class: Class 2
Classification changes within three miles:
No change in class.
Requested by: Sean Goris Date: 3/30/93
Prepared by: / Date: 5 zt
u. � i
Reviewed by:Cl/tc (� iMrr�� Date: 5 a S3
Lbw «5 CSIWI ���
Modeler
Date Rec.
#.
SA-u}
3 -�so q3
730
2
�'I 4
Drainage Area (mi ) Oo7 �) Avg. Streamflow (cfs): / 00
7Q10 (cfs) t7 Winter7Q10 (cfs) +C,;;,+ 30Q2 (cfs)
Toxicity Limits: IWC —4 ut % Acronic
Instream Monitoring: bc-5o y++%
Parameters
Upstream Location
Downstream Location
Effluent
Characteristics
Summer
Winter
BOD5 (mg/1)
30
3�
NH3-N (mom)
D.O. (mg/1)
TSS (mg/1)
30
3U
F. Col. (/100 ml)
pH (SU)
_
Comments:
NPDES WASTE LOAD ALLOCATION
PERMIT NO.: NCO020567
PERMITTEE NAME. Town of Elkin
FACILITY NAME: Town of Elkin WWTP
Facility Status: Existing
Permit Status: Modification
Major Minor
Pipe No.: 001
Design Capacity: 1.0 MGD
Domestic (% of Flow): 100 %
Industrial (% of Flow): 0 %
Comments:
scheduled to be complete in September of 1993. They have been dropper
pM Frt- fYff.+%o- wr,-G 1^e, L KO gi Wi �," indvb+'ric�_ VSarS .
RECEIVING STREAM: the Yadkin River
Class:. C
Sub -Basin: 03-07-02
Reference USGS Quad: C15NE (please attach)
County: Ste'
Regional Office:_ Winston-Salem Regional Office
Previous Exp. Date: 9/30/93 Treatment Plant Class: Class 2
Classification changes within three miles:
No change in class.
Requested by: Sean Goris Date: 3/30/93
Prepared by: Date: 5 u A 3
r
Reviewed by: Lc�,�_ �ti _ ���. (�,1,y ? Date:
rq3
Modeler
#
SP,
End
739 ( 0d;
Drainage Area (mi 2) Ig 1 4;, Avg. Streamflow (cfs):
7Q10 (cfs) 1-7 Winter 7Q10 (cfs) 30Q2 (cfs)
Toxicity Limits: IWC • 41 % Acut�,Chronic
Instream Monitoring: Lc50 7 -m ?a
Parameters
Upstream Location
Downstream Location
Effluent
Characteristics
Summer
Winter
BOD5 (m )
30
-3d
NH3-N (mg/1)
D.O. (mg/l)
TSS (mg/1)
3o
30
F. Col. (/100 ml)
2_00
Zot,
pH (SU)
_
LeAP
It(oN11of-
k013tTvie-
iijE
Z0
2113
Comments:
RECEIVED
FACT SHEET FOR WASTELOAD ALLOCATION N.C. kept. Of EH1\IR
Facility Name:
Elkin WWTP
NPDES No.:
NCO020567
Type of Waste:
Domestic - 100%
Facility Status:
Existing
Permit Status:
Renewal
Receiving Stream:
Yadkin River
Stream Classification:
C
Subbasin:
030702
County:
Surry
Regional Office:
WSRO
Requestor:
S. Goris
Date of Request:
3/30/93
Topo Quad:
C15NE
MAY 1 4 j993
Request # 7381
_6 Wins-'t: rj-S,:je.M
Regional office
Stream Characteristic:
USGS #
Date:
Drainage Area (mi2):
Summer 7Q10 (cfs):
Winter 7Q10 (cfs):
Average Flow (cfs):
30Q2 (cfs):
IWC (%):
878
317
454
1400
0.49 69 1 M4 v)
Wasteload Allocation Summary
(approach taken, correspondence with region, EPA, etc.)
Elkin plans to upgrade from 0.9MGD to 1 MGD. Previous permit gave limits for both of these
flows. TSB recommends the same limits again. However, the pretreatment program has been
dropped and the facility currently has no SIU's. Metals monitoring will not be required.
The facility has had 4 flow violations and 1 BOD5 violation. Toxicity tests have showed no acute
toxicity for the past four years. Elkin is not required to perform instream monitoring.
A fecal coliform limit was not recommended at the 0.9 MGD flow, but the facility plans
chlor/dechlor with the expansion to 1.0 MGD.
Special Schedule Requirements and additional comments from Reviewers:
�r��/]WMEWAK
Recommended by: Zmo-w !�w jittn'- Dater s 5
Reviewed by
Instream Assessment: (L1lt (!c._. Csj N _Date:
Regional Supervisor: Date: s—� 5—
Permits & Engineering: Date:�3
RETURN TO TECHNICAL SERVICES BY: JUN 0 6 1993
2
CONVENTIONAL PARAMETERS
Existin s Limi
Monthly Average
Monthly Average
Summer Winter
Summer Winter
Wasteflow (MGD):
0.9 0.9
1.0 1.0
BOD5 (mg/1):
30 30
30 30
NH3N (mg/1):
DO (mg/1):
TSS (mg/1):
30 30
30 30
Fecal Col. (/100 ml):
200 200
PH (SU):
6-9 6-9
6-9 6-9
Residual Chlorine (µg/1):
28 28
Toxicity testing:
Qtrly Acute LC50>44%
Qtrly Acute LC50>49%
TP (mg/1):
TN (mg/1):
Recommended Limits:
Monthly Average
Monthly Average
Summer Winter WQ or EL
Summer Winter
Wasteflow (MGD):
0.9 0.9
1.0 1.0
BOD5 (mg/1):
30 30
30 30
NH3N (mg/1):
DO (mg/1):
TSS (mg/1):
30 30
30 30
Fecal Col. (/100 ml):
200 200
PH (SU):
6-9 6-9
6-9 6-9
Residual Chlorine (µg/1):
28 28
Toxicity testing:
Qtrly Acute LC50>44%
Qtrly Acute LC50>49%
TP (mg/1):
TN (mg/1):
( Moo I Top- f�qx LEA i>)
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
( I -AP (K0nflT0XIfJq - _,jQQ FnR MATOO)
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.
•o
_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
Adcquacy of Existing Treatment
Has the facility demonstrated the ability to meet the proposed new limits with existing treatment
facilities? Yes No _ t' 1
If no, which parameters cannot be met?
Would a "phasing in" of the new limits be appropriate? Yes No -X
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? _N (Y or N) If yes, explain with attachments.
AT- a m4p
Facility Name 6*114 W WTP Permit # Ncx2o56? Pipe #
ACUTE TOXICITY PERMIT LIMIT (QRTRLY)
The permittee shall conduct acute toxicity tests on a quarter
basis using protocols defined as definitive in E.P.A.
Document 600/4-85/013 entitled "The Acute Toxicity of Effluents to Freshwater and Marine Organisms." The
monitoring shall be performed as a Daphnia pulex or Ceriodanhnia 48 hour static test, using effluent collected as a
24 hour composite. The LC50 of this effluent using the previously stated methodology may at no time in any
toxicity test be less than %. Effluent samples for self -monitoring purposes must be obtained during
representative effluent discharge below all waste treatment. The first test will be performed after thirty days from
the effective date of this permit during the months of Mhx 1 .1 u n>, SEEP . Dec
The parameter code for this test if using Daphnia palsx is TAA3D. The parameter code for this test if using
Ceriodaphnia is TAA3B. 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 appropriate
parameter code. 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 either these monitoring requirements 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 30
cfs
Permitted Flow n . 4
MGD
IWC 0.44
%
Basin & Sub -basin 030702
(Twoz�L_
Receiving Stream , %*W
twee_
County Vvo*�
Recommended by::���
�f • V[x64t
Date '� /5 /43
QAL Daphnid 48 Version 10191
AT I MCt P
Facility Name
Permit # A)C0020G&7 Pipe #
ACUTE TOXICITY PERMIT LIMIT (QRTRLY)
The permittee shall conduct acute toxicity tests on a qua_rw_rjX basis using protocols defined as defmitive in E.P.A.
Document 600/4-85/013 entitled "The Acute Toxicity of Effluents to Freshwater and Marine Organisms." The
monitoring shall be performed as a Daphnia pulex or Ceriodaphnia 48 hour static test, using effluent collected as a
24 hour composite. The LC50 of this effluent using the previously stated methodology may at no time in any
toxicity test be less than-&%. Effluent samples for self -monitoring purposes must be obtained during
representative effluent discharge below all waste treatment. The first test will be performed after thiM d= from
the effective date of this permit during the months of Q I Tk nl
The parameter code for this test if using Daphnia ]nu ex is TAA3D. The parameter code for this test if using
Ceriodaphnia is TAA3B. 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 appropriate
parameter code. 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 either these monitoring requirements 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 monitorine reauirements 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 31-7 cfs
Permitted Flow ! - MGD
IWC 0.41 %
Basin & Sub -basin o3o7n2 yami)
Receiving Stream Acw-W Ro def-
County SuCA6
Recommended by:
.ZX4631e I. &Ae�
Date S .
QAL Daphnid 48 Version 10191
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89
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