NC0076775_Wasteload Allocation_19920806

NPDES DOCIMENT SCANNING COVER SHEET
NPDES Permit:
NC0076775
Falls Powerhouse
Document Type:
Permit Issuance
asteload Allocation —
Authorization to Construct (AtC)
Permit Modification
Complete File - Historical
Engineering Alternatives (EAA)
Owner Name Change
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Document Date:
August 6, 1992
This document is printed on reuse paper - ignore any
content on the reirerse side

PERMIT NO.:
PERMITTEE NAME: Yadkin Inc.
`^ ,y NPDES WASTE LOAD ALLOCATION
TV AC �1 1S WE
C-008922d:sc�..L t�;s u�t,�-
o1.�l4cG(.r`� �rcriws �Ssv.E'p
FACILITY NAME: Falls Powerhouse
Facility Status: Existing
Permit Status: New
Major Minor '/
Pipe No.: 006
Design Capacity: 0.0005 MGD
Domestic (% of Flow): 100 %
Industrial (% of Flow):
Cop uni4 F{LO /tD tee. 1N MaNA.0 To KE�LL-1�
Comments:
WWTreatment System. This is the same discharge as NC0076775.
Copy of effluent attached.
RECEIVING STREAM: Yadkin River
Class: WS-III and B
Sub -Basin: 03-07-08
Reference USGS Quad: F18NE
County: Stanly
Regional Office: Mooresville Regional Office
(please attach)
Previous Exp. Date: 00/00/00 Treatment Plant Class:
Classification changes within three miles:
no change
Requested by:
Prepared by:
Reviewed by: l
oD� l3s (qui
Randy Kepler
Date: 4/20/92
Date: 0A/1 Z
Date: OM?'
Modeler
Date Rec.
#
Drainage Area (mil) NA'
DRM PLOW
N� MrnflM.unA-
Avg. Streamflow (cfs): R�2Eats �FE,��
7Q10 (cfs) Winter 7Q10 (cfs) 30Q2 (cfs)
Toxicity Limits: IWC % Acute/Chronic
Instream Monitoring:
Parameters
Upstream Location
Downstream Location
Effluent
Characteristics
Summer
Winter
BOD5 (mg/1)
0
NH3-N (mg/1)
D.O. (mg/1)
TSS (mg/1)
30
3 0
F. Col. (/100 ml)
2_oo
ZD c7
pH (SU)
6 _ 1
6 _ I
PLOI
TED
Comments:

0 \ j
rTh
x 63
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f ` r\ /-j)
•
• � ri
MORROW J
•
FALLS
POWERHOUSE
•
.% •
-
•
•
A.x."
MOUNTAIN
/
• . F-- d�8ttay - _ .� • — _ -
i
Keat v / \ a:ampgrthod./=�
YADKIN. INC.
FALLS POWERHOUSE
LOCATION MAP
SCALE 1'1 2000'
empe
aonualebo anglors fed ontaisnr/d sa nebto
•

OUTFALL
NO.
001
002
003 (1)
004
005 (1)
006 (2)
007
(1)
•
DAILY DISCHARGE,
GALLONS
432,000
43,200
432,000
43,200
475,200
500
720
YADKIN RIVER
f
OA
004 007
003 006))
orz\\ 005
ttf T-1 k
• s 1!lI!I1JlRhI'
leg
'- FALLS
LAKE ---`,
DISCHARGE
TYPE
Generator Cooling Water 11
Thrust Bearing Cooling Water
Generator Cooling Water
Thrust Bearing Cooling Water
Combined Generator/
Thrust Bearing Cooling Water
Treated Domestic Wastewater
Sump Drain
(1) CURRENTLY PERMITTED AS OUTFALL 008,
NPDES PERMIT NO. NC 0004308.
(2) CURRENTLY PERMITTED, NO. NC0076775
?ilim,trT
lz°
fie"?) CA -
Pow House
dadr
PRIVATE
ROAD
YADKIN, INC.
FALLS POWERHOUSE
SITE PLAN
SCALE: N.T. S.
empe
aaaratb/ .nghows .,r .nellneanenlar .abekb

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
Falls Powerhouse (.AL-)
NC00.S 1922r - 006 g i -o—ac/
Domestic - 100% 7 , 7
Existing
New
Yadkin River
WS-Ill & B
030708
Mentgern Sao...\
FRO h. t? b, ,,
R. Kepler r,
4/16/92
F18NE
Request # 6886
75
Stream Characteristic:
USGS #
Date:
Drainage Area (mi2):
Summer 7Q10 (cfs):
no min release on ,
FERC
Winter 7Q10 (cfs): r
Average Flow (cfs):
30Q2 (cfs):
IWC (%):
ry
-T3
Wasteload Allocation Summary
(approach taken, correspondence with region, EPA, etc.)
Falls Powerhouse discharges below Falls dam and below the dam at Badin Lake. Per DWR
(5/92), no minimum release exists in their 1958 FERC license, although a release of at least 150
cfs from Blewett Falls (many miles downstream) is to be maintained. Previous WLA's for these
discharges stated that Yadkin Inc. was required to maintain a minimum release of 1400 cfs from
Badin Lake (This may be self-imposed and will be used by TSB).
This WLA was previously permitted under NC0076775-001. ALCOA is consolidating several
outfalls under one permit.
The facility had been meeting its limits until 2/92. It has problems with underloading; ALCOA is
considering going to a subsurface disposal system.
Due to "B" waters classification, Fecal coliform limits must be applied.
Special Schedule Re irements and additional comments from Reviewers
J� Vr /L -cY G Pam °
Recommended by:
Reviewed by
Instream Assessment:
Regional Supervisor:
Date: 6
Permits & Engineering: V -
,40*-4/111 -1)fic-
RETURN TO TECHNICAL SERVICES BY:
/Lee"
Date: (S Gi
Date: 411/qD--
Date: 7/7ki i' y
JUL 0 4 19
JUN 11 1992
ENV. MANAGEMENT
FAYETTEVILLE REG. OFFICE

2
CONVENTIONAL PARAMETERS
F fisting Limits:
Monthly Average
Summer Winter
Wasteflow (MGD): 0.0005 0.0005
BOD5 (mg/1): 30 30
NH3N (mg/1):
DO (mg/1):
TSS (mg/1): 30 30
Fecal Co1. (/100 ml): 200 200
pH (SU): 6-9 6-9
Residual Chlorine (µg/1):
Oil & Grease (mg/1):
TP (mg/1):
TN (mg/1):
Recommended Limits:
Monthly Average
Summer Winter WQ or EL
Wasteflow (MGD): 0.0005 0.0005
BOD5 (mg/1): 30 30
NH3N (mg/1):
DO (mg/1):
TSS (mg/1): 30 30
Fecal Co1. (/100 ml): 200 200
pH (SU): 6-9 6-9
Residual Chlorine (µg/1):
Oil & Grease (mg/1):
TP (mg/1):
TN (mg/1):
No limit changes
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 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? _N (Y or N) If yes, explain with attachments.

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DIVISION OF ENVIRONMENTAL MANAGEMENT .
June 5, 1992
MEMORANDUM
TO: Randy Kepler
FROM: 'Susan A. Wilso
THROUGH: Ruth Swanek Qc
Carla Sanderson (.
SUBJECT: Yadkin, Inc. Powerhouses (ALCOA)
Falls, Narrows, Tuckertown
NC0081922, NC0081957, NC0081949
Cooling Water Outfalls and Sump Drain Outfalls
After discussion with Mike Parker of the Mooresville Regional Office (MRO), the cooling
water discharges from the powerhouses should receive the standard cooling water
language. This applies to any generator cooling water, thrust bearing cooling water, and
any other type cooling water. Please refer to the staff report when assigning outfall
numbers for these discharges.
BMP's will be employed for the discharge from the sump drains at the powerhouses. The
MRO recommends no effluent monitoring for those outfalls. Technical Support concurs
with this request, as long as the facility continues to change the oil absorbent pads at least
quarterly and cleans the oil sumps at least annually, as suggested in their BMP's. Because
the discharges are below the dams on the Yadkin River, minimal impact is expected from
the sump drain outfalls.
The domestic discharges for Falls Powerhouse (NC0081922) and Narrows Powerhouse
(NC0081957) are addressesed in separate wasteload allocations.
cc: Mike Parker, MRO

i_ 1i;1991
"1 a
State of North Carolina
Department of Environment, Health and Natural Resources
Division of Environmental Management
512 North Salisbury Street • Raleigh, North Carolina 27611
James G. Martin, Governor George T. Everett, Ph.D.
William W. Cobey, Jr., Secretary
February 12, 1991
Mr. Conrad A. Carter
Yadkin, Inc.
PO Box 576
Badin, NC 28009
Subject: NPDES Permit No. NC0076775
Yadkin, Inc.
Stanly County
Dear Mr. Carter:
Director
The Division has received and reviewed your request for modification or waiver of
monitoring requirements. In January of 1984, the Division enacted new minimum monitoring
requirements that apply statewide to all facilities. These new monitoring requirements have
been incorporated into permits as they became eligible for renewal or upon 60 days notice for
those facilities which have a questionable compliance status. The old monitoring frequency was
insufficient to allow the Division to accurately determine the compliance status of most
facilities. In addition, the new requirements have abolished many of the unnecessary influent
and stream monitoring requirements. In accordance with Title 15, North Carolina
Administrative Code (NCAC) Section 2B .0508(b) (1), the Director of the Division of
Environmental Management may modify or waive any of the tests and measurements, sampling
points, or frequency of sampling requirements. Accordingly I have decided to grant your request
for at least twice per month monitoring for all parameters. Attached is a revised effluent sheet
which reflects the requested changes. This sheet should be inserted into your permit and the old
effluent sheet should be discarded.
If any parts, measurement frequencies or sampling requirements contained in this
permit are unacceptable to you, you have the right to an adjudicatory hearing upon written
request within thirty (30) days following receipt of this letter. This request must be in the
form of a written petition, conforming to Chapter 150B of the North Carolina General Statutes,
and filed with the Office of Administrative Hearings, Post Office Drawer 27447, Raleigh, North
Carolina 27611-7447. Unless such demand is made, this decision shall be final and binding.
Pollution Prevention Pays
P.O. Box 27687, Raleigh, North Carolina 27611-7687 Telephone [phone]
An Equal Opportunity Affirmative Action Employer

Mr. Conrad A. Carter
Page Two
February 12, 1991
If you have further questions in this matter, please call Mr. Mack Wiggins at (919)
733-5083.
cc: Mr. Jim Patrick, EPA
Mooresville Regional Supervisor
Compliance
Central Files
Technical Support Branch

A. (). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS FINAL Permit No. NC0076775
During the period beginning on the effective date of the permit and lasting until expiration, the Permittee is authorized to discharge from
outfall(s) serial number 001. Such discharges shall be limited and monitored by the permittee as specified below:
Effluent Characteristics
Flow
BOD, 5 day, 20°C
Total Suspended Residue
NH3 as N
Fecal Coliform (geometric mean)
Total Residual Chlorine
Temperature
Discharge Limitations
Monthly Avg.
500GPD
30.0 mg/I
30.0 mg/I
200.0 /100 ml
Weekly Avg.
Daily Max
45.0 mg/I
45.0 mg/I
400.0 /100 rYil
Monitoring
Measurement
Frequency
2/Month
2/Month
2/Month
Monthly
2/Month
2/Month
2/Month
Requirements
Sample
Type
Instantaneous
Grab
Grab
Grab
Grab
Grab
Grab
*Sample
.1.ocation
I or E
E
E
E
E
E
E
* Sample locations: E - Effluent, I - Influent
The pH shall not be less that 6.0 standard units nor greater than 9.0 standard units and shall be monitored 2/month at the effluent by grab
sample.
There shall be no discharge of floating solids or visible foam in other than trace amounts.