NC0024406_Waste Load Allocation_19890426

NPDES WASTE LOAD ALLOCATION
PERMIT NO.• NCOO Modeler Date Rec.
hh
FACILITY NAME:
Facility Status: PROPOSED
(circle am)
Permit Status: troa�rarron
(011cle "s)
Major minor.
Pipe No:
Design .Capacity (MGD): '7,7-"b
Drainage Area (me) �� Avg. Streamflow (cfs):.
7Q10 (cfs) Winter 7Q10 (cfs) r !IOQ2 (cfs)
U�l'lII j ce�or,
r CJ d e,
5� A ferovp,Q „a /
WIaK
W6.
IaM
Domestic (B of Flow):
Industrial N of Flow): long'
Comments: l r,
v 1.t3� vn�ts• - t u "- Crc: {t. e�4�6< �� cc�,w c,.�r�
`!ti!C` tj! (: 70 S 2 `7a ' Ot13C� M.
RECEIVING STREAM: RELew-s L-Avlt
Class: +'
Sub -Basin:
Reference USGS Quad: V St (please attach)
County: -- S
Regional Office: As Fa Mo Ra Wa W1 QD
ielrele one)
Requested By: ;Nzrc-o .Date:
Prepared By: Date: % /it 8 9
fF'
Reviewed By: Date:
4
N Limits: IWC - - - % (circle oneKAc'ute Chronic
---------- RECOMMENDED EFFLUENT LIMITS ------------------
Monthly Daily
Average Max Basis
Wasteflow (mgd): monitor
TSS (lbs/day): 1303.47 1808.6 BPT 40 CFR 423.12
& Grease (lbs/day): 422.64 563.52 BPT
Total Copper (mg/1): 1 1 BPT=BAT
Total Iron (mg/1): 1 1 BPT=BAT
Selenium (ag/1): 5 5 WQ
PH (SU): 6-9 BPT=BAT
Toxicity: Monthly Acute Fathead Minnow No Sign. MorAo. 1
No discharge of PCBs BPT=BAT
----------------------------- MONITORING --------------------------
Effluent monitoring: arsenic
Instream monitoring: Current sampling should be continued. RecommeJ
update Part III P permit condition requiring usc.OE
DEM sampling methodology
--------------------------- COMMENTS --------------------------- i lI
)(Recomm. effluent monit. to start within two hours after disch. is ac.6 &Ae4.`r
Recommend renaming pipe 003a to 005 and 003b to 003.
Recommend deletion of permit conditions specified in Part III N and © of
current permit. Udate Part ami (\?,. 11
Existing selenium limit = 4.2 lbs/day from a combination of the 003b C14
release from the Belews Lake Dam, i.e. total loading to the Dan Rivet.
This was to be an interim limit until conversion to a dry ash systewl
completed. Recommending limits of 5 & 23 eg/l .for 003a & b, respectvj1Lty
003a is only to be used to augment lake levels and should not be useA J -t -
the wet"ash system is put into operation due to dry ash system upse{
-------------------------------------------------------------------

`
Request No.: 5229
------------------- WASTELOAD ALLOCATION APPROVAL FORM -----------------
Facility Name:
NPDES No.:
Type of Waste:
Status:
Receiving Stream:
Classification:
Subbasin:
County:
Regional Office:
Requestor:
Date of Request:
Quad:
Duke Power - Belews Creek
NCO024406 Pipe 003a
Ash pond discharge
Existing/Renewal
Belews Lake
C
030201
Stokes
WSRO
Foster
4/25/89
B18SE
Power Station
-------------------- RECOMMENDED EFFLUENT LIMITS ------------------------
Monthly Daily
Werage Max Basis
Wasteflow (mgd): monitor
TSS (lbs/day): 1303.47 1808.61 BPT 40 CFR 423.12
Oil & Grease (lbs/day): 422.64 563.52 BP-1-
Total
PTTotal Copper (mg/l): 1 1 BPT=BAT 1.
Total Iron (mg/1): 1 1 BPT=BAT
Selenium (pg/l): 10 10 BFq��A� 'J& . c,
pH (SU): 6-9 BPT=BAT
Toxicity: Monthly Acute Fathead Minnow No Sign. Mortality
No discharge of PCBs BPT=BAT
----------------------------- MONITORING ---------------------------------
Effluent monitoring: arsenic
Instream monitoring: Current sampling should be continued. Recommend
permit condition requiring use of DEM sampling method.
------------------------------ COMMENTS ------------------------- `--
� � ^"�i r��'/��
Recommend renaming pipe 003a to 005 and 003b to 003.-~'*w� --~ �^~' 2%
Recommend deletion of permit conditions specified in Part III N and O of
current permit.
Existing selenium limit = 4.2 lbs/day from a combination of the 003b and
release from the Belews Lake Dam, i.e. total loading to the Dan River.
This was to be an interim limit until conversion to a dry ash system was
completed. Recommending limits of 10 & 30 mg/l for 003a & b, respectively.
003a is only to be used to augment lake levels and should not be used when
the wet ash system is put into operation due to dry ash system upset.
___________________________________________________________________________
ld,Recommended by: ________________ Date: _���[,I�r___
Reviewed by
I rxf:..... .... .... ..... L___
Regional Supervisor: __
Permits & Engineering: __
Date: ��-2 A��I
_ .....
.....
__.....
. .3
RETURN TO TECHNICAL SERVICES BY:

Facility Name D�A6 14U &LQ25 P Gia Permit # �C.(�Z�-(�ib(p r,�r�¢ A 601-1
ACUTE TOXICITY TESTING REQUIREMENT (MONTHLY)
Fathead Minnow 24hr - No Significant Mortality
The permittee shall conduct acute toxicity tests on a monthly basis using protocols defined in the
North Carolina Procedure Document entitled "Pass/Fail Methodology For Determining Acute
Toxicity In A Single Effluent Concentration". The monitoring shall be performed as a Fathead
Minnow (Pimephales promelas) 24 hour static test, using effluent collected as a 24 hour
composite. The effluent concentration at which there may be at no time significant acute mortality
in any two consecutive toxicity tests is 90% (defined as treatment two in the North Carolina
procedure document). Effluent samples for self-monitoring purposes must be obtained during
representative effluent discharge below all waste treatment. The first test will be performed within
thirty days from issuance of this permit.
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 TGE6C. Additionally, DEM Form AT -2 (original) is t6 be sent to the following address:
Attention: Technical Services Branch
North Carolina Division of
Environmental Management
P.O. Box 27687
Raleigh, N.C. 27611
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 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 cfs
Permitted Flow MGD
IWC% 40finn--
Basin & Sub -Basin o3dZ61
Receiving Stream
County,t� �5
Recommended by:
1
"Acute Toxicity (Fath ead Minnow 24 hr) No Significant Mortality at 90%,
See Part .3 , Condition G .