NC0000572_Dan River Stormwater Permit Application_20140730

DUKE
ENERGY®
July 30. 2014
Mr. Bradley Bennett, Supervisor
North Carolina Department of Environment and Natural Resources
Division of Energy, Mineral & Land Resources
Stormwater Permitting Program
1612 Mail Service Center
Raleigh, North Carolina 27699-1612
Duke Energy
Dan River Combined Cyce Station
864 South Edgewood Road
Eden, NC 27288
[phone] OFFICE
Subject Duke Energy Carolinas LLC — Dan River Combined Cycle Station
Stormwater Permit Application
Dear Mr. Bennett
Duke Energy Carolinas, LLC requests a stormwater discharge permit for Dan River
Combined Cycle Station located in Rockingham County Enclosed is a check in the
amount of $860 for the subject stormwater permitting fee and three sets of the following
documents related to this permit request
EPA Form 1
EPA Form 2F
EPA Form 2F Supplemental Information
Available Stormwater Analytical Data
Site Location Map
Site Stormwater Plan Drawings
Historical data have not been included because it is obsolete owing to the many significant
changes this facility has undergone in recent years The stormwater outfall nomenclature
has also been revised from previous submittals There are two stormwater plan drawings,
one which depicts current status and the other projects future stormwater outfalls
If additional information is needed, please advise Should you have questions regarding
this application, please contact Allen Stowe at {704} 382-4309 or Allen. Stowe duke-
energy.com
Sincerely,
Glenn Harris
General Manager ll, CC/CTs

Check Date: Ju113012014
Vendor Number: 0000071949
Name: STATE OF NORTH CAROLINA DEPARTMENT OF
Check Number:
1000121292
Invoice Number
Invoice Date
Voucher ID Gross Amount
Discounts Taken
Late Charlie
Paid Amount
07292014DR
Jul/2912014
10662171 86000
0.00
0.00
860 i"0
Check Number:
Dole
Total
Gross Amount
Total
Discounts
Total
Late Ch4rges
Tolal
Paid Amount
1000121292
Jul/3012014
S860.D0
50.00
$0.00
5850.00
DUKE ENERGY NAP.IE AND LOGO ARF ON BACK. HOLD AT AN ANGLE TO V�EW. V010 IF ABSENT.
Duke EnuU Busirten Services 1000121242
DUKE 400 South Tryon StreetJPMORGAN CHASE BANK, N -A -
ENERGY. Chatiotk, NC 28285 #s � G "�7 Symcuse, NY 5"371213
Corporate Accounts Payable
y ST25B 1 400 South Tryon Street y�:: i • ' : �, `y a ! kI - �t ; • r
Charlotte, NC 28285 4; Date 7130114 r
�' y ��• 1
Pay Bight hundred sixty acrd xr / 100 Dollars
To The IN
Order or STATE OF NORTH CAROLINA DEPARTMENT OF
+ ENVIROMENT AND NATURAL RESOURCES
DIV OF ENERGY MINERAL AND t
LAND RESOURCES 1 b tf r
Al
. 1612 MAIL SERVICE CENTER r `�
Raleigh, NC 27699-1612
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Please print or type to the unshaded areas only
Form Approved OMB No 2040.0088 -
FORM U S ENVIRONMENTAL PROTECTION AGENCY
I EPA ID NUMBER
\=.EPA GENERAL INFORMATION
,
„� r
Consolidated Permits Program
F
NC 0 0 0 3 4 6 8
GENERAL (.•-b:r,Irk, i, n:•ru; Invinscluun ' .ore sturi. s!)
D
'31 u 1 is
LABEL ITEMS
GENERAL INSTRUCTIONS
If a preprinted label has been provided• affix it in the
J ERA I.D. NUMBER
designated space Review the information carefully rf any of t
is incorrect• crass through it and enter the correct data in the
appropriate Ukri area below Also, it any of the preprinted data
III FACILITY NAMEis
PLEASE PLACE LABEL IN THIS SPACE
absent (the area to the teff of the label space lists the
information that sh0vAd appear) please provide it in the proper
V FACILITY MAILING
fill-in area(s) below It the label is complete and correct. you
need not complete Items 1 Ill, V and VI (except VI -B which
ADDRESS
must be completed regardless) Complete all nems A no label
has been provided Refer to the instructions for detailed item
VI FACILITY LOCATION
descriptions and for the legal authorizations under which this
data is collected.
II POLLUTANT CHARACTERISTICS
INSTRUCTIONS Complete A through J to determine whether you need to submit any permit application forms to the EPA. If you answer -yes' to any questions you must
submit this form and the supplemental form listed in the parenthesis following the question Mark 'X' n the box in the thins column if the supplemental form is attached If
you answer'no' to each question, you need not submit any of these forms. You may answer'no' if your activity is excluded from permit requirements, see Section C of the
instructions. See also Section 0 of the instruct ons for definitions of bold-faced terms
Mark 'r
Mrk -k"
SPECIFIC QUESTIONS YE.No ATTACIIEO
SPECIFIC QUESTIONS res No RM
A Is this facility a publicly owned treatment works whichFORM
results in a discharge to waters of the U.S.? (FORM 2A) X
ATTACCHED
B Does or will this facility (either existing or proposed)
include a concentrated animal feeding operation or X
aquatic animal production facility which results in a
+' +e
discharge to waters of the U.S.? (FORM 2B) s m „
C Is this a facility which currently results in discharges toD
waters of the U.S. other than those X
Is this a proposed facility (other than those described in A
described in A or B
or 8 above) which will result in a discharge to waters of I X
above? (FORM 2C)
the U.S.? (FORM 2D)
N
E Does or will this facility treat, store or dispose of
hazardous wasles7 (FORM 3) X
n at
F Do you or will you inject at this fad ity industrial or
mun opal effluent below the lowermost stratum X
conta ning within one quarter mile of the wellbore,
to
underground sources of drinking water? (FORM 4)
G Do you or will you inject at this facility any produced waterH
31 X
Do you or coil. you inject at this facility fluids for special
or other fluids which are brought to the surface in
connection with conventional oil or natural
X
processes such as mining of sulfur by the Frasch process
gas production.
inject fluids used for enhanced recovery I
solution m ping of minerals, in situ combustion of fossil X
of o or natural
fuel or recovery of geothermal energy? (FORM 4;,
gas, or inject fluids for storage of liquid hydrocarbons?
(FORM 4) s.
34
I Is this facility a proposed stationary source which is one
37 b .Y
J Is this fadlty a proposed stationary source which is
of the 28 industrial categories listed in the instructions and �.
which will potentially emit 100 tons per year of any air X
NOT one of the 28 industrial categories listed in the
X
instructions and which will potentially emit 250 Ions per
pollutant regulated under the Clean Air Act and may affect I I
year of any air pollutant regulated under the Clean Air Act
or be located in an attainment area? (FORM 5) a 4, 47
and may affect or be located in an attainment area? 43 « w
(FORM 5)
Ill NAME OF FACILITY
SKIP pan River Com1bined Cycle Station
J1c
is re s to
IV FACILITY CONTACT
so
A NAME & TITLE (lust, first, R frrle)
c
B PHONE (urea c xie R nn.)
2 S owe, J. Allen Lead Environmental Specialist ( 0 ) 3 2-4 0
I,e
a! 4e M
V FACILTY MAILING ADDRESS
A STREET OR P.O BOX
J33 P.O. Box 1006 Intern fice Mail - EC13K
+s m
43
B CITY OR TOWN
c
C STATE I D ZIP CODE
4 Charlotte
C 2 2 1
,s ,e
40 al 42 1 47 lr
VI FACILITY LOCATION
A. STREET, ROUTE NO. OR OTHER SPECIFIC IDENTIFIER
15.1 814 Sou h Edgewood Drive
rs ,e
u
B COUNTY NAME
Rocking am
C CITY OR TOWN
ro
D STATE I E. ZIP CODE I F COUNTY CODE (it knoun)
c
e R e
C 11242148 7
s +e
EPA Form 3510.1 (8-90)
CONTINUE ON REVERSE

SIC CODES (4-di_ait. on order of prix
A,
4911 �leccrt-
�e l
C.
A NAME
8 Duke Energy Carolinas, LLC
sa �
C STATUS OF OPERATOR (l3ticrM4 upprr-priaicletter ininthe uteruerhu.r if '(Jther
M - PUBLIC (nrl.:r mutt /identl iw vote) p l+/x-r1.i
S = STATE )
P = PRIVATE 0 = OTHER (ipt. -ij
x
E. STREET OR P.O. BOX
4121 South Church Street
Charlotte
r'l-alltrfitev If
NC0003468
+e
B. UIC R:iulrnrr,ntrd Lnrvf r r
C RCRA Hu=:m/utrn If;
NCD024666535
8.15 the name listed in Item
VIII -A also the owner
0 YES ❑ NO
PHONE ('L 1) Mill' & nu J
[phone]
r r Is the facility
NC 28242 ❑ YES
03455T30 (Title V Air)
7$Odl�R02 r r r . . . i I(FheareJlI A id
WQ0000452
an Ind
0 NO
Of R{—J OA' Salida
- - a
XI MAP
Attach to this application a lopograph c map of the area extending to at least one mi a beyond property boundaries. The map must show the outline of the facility the
location of each of its existing and proposed intake and discharge structures, each of its hazardous waste treatment, storage, or disposal facilities and each well where it
injects fluids underground Include all springs, rivers and other surface water bodies in the map area. See instructions for precise requirements
XII NATURE OF BUSINESS (provide a brief description)
Sas Fired E_ecrt is Generation
XIII CERTIFICATION (sec instructions)
i certify under penalty of faw that t have personally examined and am familiar with the information submitted in this application and all attachments and that based on my
inquiry of those persons immediately responsible for obtaining the information contained in the application 1 believe that the information is true accurate and complete t
am aware that there are significant penalties for submitting false information, including the possibility of Ane and imprisonment
A NAME 8 OFFICIAL TITLE (rtpL• ear prior) B SIGNATURE C DATE SIGNED
Glenn Harris, General Mgr II, 4
CC/CTs
COMMENTS FOR OFFICIAL USE ONLY
EPA Form 3510-1 f.8-90)

EPA ID Number (ropy fromltem 1 of Form 1) Form Approved OMB No 2040-0086
Please print or type in the unshaded areas only NC00003468 Approval expires 5-3192
A U.S Environmental Protection Agency
FORM Washington DC 20460
2F-` pq Application for Permit to Discharge Storm Water
NPDES Discharges Associated with Industrial Activity
Paperwork Reduction Act Notice
Public reporting burden for this application is estimated to average 28 6 hours per application, including time for revie ung inslructicns. searching existing data sources
gathering and maintaining the data needed, and completing and reviewing the collection of information Send comments regarding lure burden estimateany other aspect
of this collection of information, or suggestions for improving this form, including suggestions which may increase ar reduce this burden to Chief Information Po cy
Branch, PM-223, U 5 Environmental Protection Agency, 1200 Pennsylvania Avenue NW Washington DC 2046x, or Director Office of Information and Regulatory
Affairs, Office of Management and Budget, Washington, DC 20503
(.Outfall Locatlan
For each outfall, list the latitude and longitude of its location to the nearest 15 seconds and the name of the receiving water.
A. outfall Number D Receiving Water
(list) B Latitude C Longitude
(name)
See attached Sur atta,,.ed supplemental informati-n
11. Improvements
A Are you now required by any Federal. State or local authority to meet any implementation schedule for the construction, upgrading or operation of wastewater
treatment equipment or practices or any other environmental programs which may affect the discharges described in this applicaton7 This includes but is not limited
to, permit conditions administrative or enforcement orders, enforcement compliance schedule letters. stipulations. court orders. and grant or loan conditions
2. Affected Outfalls 4 F nal
1 Identification of Conditions, Compliance Date
Agreements, Etc. number source of discharge 3 Brief Description of Project
a req b proj
N/A
B You may attach additional sheets describing any additional water pollution (or other environmental projects which may affect your discharges) you now have under
way or which you plan Indicate whether each program is now under way or planned, and indicate your actual or planned schedules for construction
III. Site Drainage Map
Attach a site map showing topography (or indicating the outline of drainage areas served by the outtalls(s) covered in the application if a topographic map is unavailable)
depicting the facility including each of its intake and discharge structures, the drainage area of each storm water outfall, paved areas and buildings within the drainage
area of each storm water outfall each known past or present areas used for outdoor storage of disposal of significant materials each existing structural control measure
to reduce pollutants in storm water runoff materials load ng and access areas areas where pesticides, herbicides soil conditioners and fertilizers are applied; each of
its hazardous waste treatment storage or disposal units (including each area not required to have a RCRA permit which is used for accumulating hazardous waste
under 40 CFR 262.34) each well where fluids from the fax rty are injected underground springs, and other surface water bodies which received storm water discharges
from the facility
EPA Form 3510-2F (1-92) Page 1 of 3 Continue on Page 2

Continued from the Front
IV. Narrative Description of Pollutant Sources
A For each outfall provide an estimate of the area (mcludr, w. rise of imperious surfaces (including paved arras a-d building roofs) drained Io the ct�tfali, and an estimate of the total surface area
drained by the outfall
Outfall Area of Imperv'ous Surfar.:e Total Area Drained outfall Arca of Impervious Surface Tota Area drained
Number (provide unds) (Prowde unds) Number (provide unrfs? M..'cvide .errs)
See attached supp?rm:rnra'.
information
B Provide a narrative description of sign ficant materials that are currently or in the past three years have been treated stored or disposed in a manner to al ow exposure
to storm water; method of treatment, storage or d sposal, past and present materials management practices employed to minimize contact by these materials with
storm water runoff materials load ng and access areas, and the location, manner and frequency in which pesticides herbicides, soil conditioners, and fertiilzers are
applied
See attached supplemental inf-ration
C For each outfall, provide the location and a description of exist ng structural and nonstructural control measures to reduce pollutants in storm water runoff; and a
description of the treatment the storm water receives, includ ng the schedule and type of maintenance for control and treatment measures and the u timate d'sposal
of any solid or fluid wastes other than by discharge.
outfall List Codes from
Number Treatment Table 2F-1
_= utta-hAd supplLm--nta; inEar}atia_,
V. Nonstormwater Discharges
A. 1 certify under penalty of law hat the oulfall(s) covered by this application have been tested or evaluated for the presence of nonstormwater discharges and that all
nonstormweler discharged from these outfall(s) are identified in either an accompanying Form 2C or From 2E application for the outfall.
Name and official Title (type or print) Signature Date Signed
Glenn Harris/General Mgr,II A-
B
Provide a description of the method used, the date of any testing and the onsite drainage points that were directly observed during a test
Visual inspection was performed on 7/3/2014. Stormwater outfalls were inspected following a period of dry weather of at lea-t
72 hours duration to determine if any process water was discharging. Groundwater was observed co be discharging from ;Wr -.
VI. Significant Leaks or Spills
Provide existing information regarding the history of significant leaks or spills of toxic or hazardous pollutants at the facility in the last three years including the
approximate date and location of the spill or leak, and the type and amount of material released.
n February 2, 2014, there was a significant ash wastewater spill believed to contain constituents in excess of rep crab,
uantities set forth by Section 311 of the Clean water Act or Section 102 of CERChA.
EPA Form 3510-21" (1-92) Page 2 of 3 Continue on Page 3

EPA ID Number (copy from item t of Form 1)
Continued from Page 2
F, C-0003468
VII. Discharge Information
A, B C, & D. See instructicns before proceeding Complete one set of tables for each outfall Annotate the outfall number in the space provided
Table VII -A, VIi-8, VIi-C are included on separate sheets numbers VII -1 and V1I-2
E Potential discharges not covered by analysis - is any toxic pollutant listed in table 2F.2, 2F-3 or 2F4, a substance or a component of a substance which you
currently use or manUfaCIL re as an intermediate or final product or byproduct?
❑ Yes (;fist al. such pollutants below) Q No (go to Section 1X)
VIII. Biological Toxicity Testing Qata
Do you have any knowledge or reason to believe that any biological test for acute or chronic toxicity has been made on any of your discharges or on a receppng water in
relation to your discharge within the last 3 years?
❑ Yes (list all such pollutants below) 0 No (go to Section IX)
Toxicity testing f;as be -en performed i, association with NPDES wastewater discharge outfall 0,7. No toxicity testing has been
performed for the etormwater outfa.ls.
IX. Contract Analysis Information
Were any of the analyses reported in Item VIl performed by a contract laboratory or consulting firm?
© Yes (list the name, address, and telephone number o/ and pollutants ❑ No (go to Section X)
analyzed by, each such laboratory or firm below)
A Name B Address C Area Code & Phone No D, Pollutants Analyzed
Pace Analytical Services, Inc 9900 Kincey Ave., suite 100 704-975-9092 Oil& Grease
Huntersville, NC 29073
Duke Power Company LLC d/b/a 13339 Hagers Ferry Road 7D4-975-5245 All additional parameters
Duke Energy Carolinas, LLC Huntersville, NC 23079 7929 COD,C1,F,sulfate,Hg,A1,Ha,8,
Ca,hardness,Fe,Mg,Mn,Zn,Sb,
As,Cd,Cr,Cu,Pb,Mo,Ni,Se,Tl,
TDS,TSS
X. Certification
1 certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure
that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system or those persons
directly responsible for gathenng the information, the information submitted is, to the best of my knowledge and belief true accurate and complete I am aware that
there are sign iicant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations.
A, Name & Official Title (Type Or Print) B Area Code and Phone No
Glenn Harris /Gen Mgr Il CC/CTs 036, 635-3080
C. Signature D Date Signed
EPA Form 3510-217 (1-92) Page 3 of 3

EPA ID Number (copy from Item 1 of Form 1)
Form Approved OMS No 2040-0086
SC0003468
Approval expires 5-31-92
VII. Discharge information (Continued from page 3 of Form ZF)
Part A — You must provide the results of at least one analysis for every pollutant in this table Complete one table for each outfall. See instructions for additional details
Maximum Values Average Values
(include units) (include units) Number
Pollutant Grab Sample Grab Sample of
and Taken During Taken During Storm
CAS Number
First 20 Flow-Weighted First 20 Flow-Weighted Events
(if available)
Minutes Composite Minutes Composite Sampled
Sources of Pollutants
Oil and Grease NIA
(see attached analytical results
Biological Oxygen
Demand (8005)
for the various SW outfalls)
Chemical Oxygen
Demand (COD)
Total Suspended
Solids (TSS)
Total Nitrogen
Total Phosphorus
pH Minimum Maximum Minimum Maximum
Part B — List each pollutant that is limited in an effluent guideline which the facility is subject to or any pollutant listed in the facility's NPDES permit for ils process
wastewater (if the facility is operating under an existing NPDES permit). Complete one table for each outfall.
See the instructions for additional details and
requirements.
Maximum Values Average Values
(include units) {include units) Number
Pollutant Grab Sample Grab Sample of
and Taken During Taken During Storm
CAS Number
First 20 Flow-Weighted First 20 Flow-Weighted Events
(davailable) Minutes
Composite Minutes Composite Sampled
Souris of Pollutants
(See attached analytical results
for the various SW outfalls)
EPA Form 3510-2F (1.42) Page VII-1
Continue on Reverse

Continued from the Front
Part C - List each pollutant shown in Table 2F-2, 2F-3, and 2F-4 that you know or have reason to believe is present See the instructions for additional details and
requirements Complete one table for each outfall
Maximum Values Average Values
(include units) (include units) Number
Pollutant Grab Sample Grab Sample of
and Taken During Taken During Storm
CAS Number First 20 Flow-Weighted First 20 Flow-Weighted Events
(if available) Minutes Composite Minutes Composite Sampled Sources of Pollutants
(see attached analytical results f::r
the various stormwater outfalls.
Pan D — Provide data for the storm event(s) which resulted 'n the maximum values for the now weighted composite sample.
4 5
1 2 3 Number of hours between Maximum Sow rate during e.
Date of Duration Total rainfall beginning of storm measured rain event Total flow from
Storm of Storm Event during storm event and end of previous (gallonavrninute or rain event
Event (in minutes) (in inches) measurable rain event specify units) (gallons or specify units)
other attached analytical results for the various stormwater outfalls
7. Provide a description of the method of Sow measurement or estimate.
Flcw data derived from a theoretical flow calculation using local meteorol;gi,al data and contributing watershed area of the
area outfalls,
EPA Form 3510-2F (1.92) Page VII-2

Dan River Combined Cycle Station
Stormwater Supplemental information
General Facility Description
The Dan River Combined Cycle Station is a 620 -megawatt (MW) natural gas facility located in
Rockingham County, NC near the city of Eden. The facility is located on the same property as
the retired Dan River Steam Station. The three coal fired units (Units 1,2, and 3) of the Dan
River Steam Station were retired in April 2012. The remaining facilities and the combustion
turbines (Unit 4, 5, and 6) of the Steam Station were retired in October 2013. Commercial
operation of the Dan River Combined Cycle Station began on December 10, 2012. The
Combined Cycle plant utilizes state-of-the-art air emissions control devices like selective
catalytic reduction (SCRs) and oxidation catalyst to reduce air emissions. These controls
combined with the retirement of the older coal units has and will continue to greatly reduce
nitrogen oxide, sulfur dioxide, and carbon monoxide emissions at the site.
Dan River CC has a Stormwater Pollution Prevention Plan (SWPPP) and uses the best
management practices outlined in the SWPPP to minimize the risk of polluting stormwater.
Stormwater Outfall Descriptions
The following descriptions serve to further narrate the existing and future defined storm water
outfalls for the Dan River Steam Station site and the existing precautionary measures in each
drainage area.
Storm Water Outfall SWO01 and Former SWO02
o Discharge Structure:
48 -inch and 36 -inch diameter RCP
o Location:
South of Combined Cycle Station
o Drainage area:
17.42 acres and 2.34 acres
o Area Description:
This outfall conveys the majority of storm water flows from
generated from the Combined Cycle Station. Areas
include the Substation, Admin building, Generator and
Steam Turbine buildings, Clarifier, Clarifier Filters, and
Filter Press.
o Material Storage/Controls:
Chemical and Fuel/Oil storage details can be found on the
existing SWPPP document for the Combined Cycle Station
and accompanying Figure 2. Secondary containment is
provided for all chemical and fuel/oil storage. Additionally,
protocols are in place to manage storm water accumulation
in open air secondary containment areas. Valves in these
areas remain in the closed position until criteria are met to
release accumulated storm water into the drainage system.
Storm Water Outfall SWO03
o Discharge Structure: 3 12 -inch diameter steel culverts
o Location: West of the steam station powerhouse building
o Drainage area: 1.02 acres

o Area Description: This outfall conveys flows from the laydown yard and
storage area to the west of the steam station powerhouse
building. All flow in the drainage area flows overland to a
ditch leading to the outfall. Drainage area is gravel and
grassed.
o Material Storage/Controls:
Spare equipment, parts, steel, iron, cable, and
miscellaneous supplies are stored in the relatively flat
gravel area. Some fabrication work may also be
performed in the area associated with the steam station
decommissioning effort. Equipment and supplies stored in
the laydown area generally do not contain liquid.
Former NPDES Outfall 004
o Discharge Structure: 10 -foot diameter corrugated steel pipe
o Location: Service water settling pond outfall pipe
o Drainage area: 147 acres on-site and 600 acres offsite
o Area Description: This outfall conveys overflows from the service water
settling pond. This includes the outfalls for the Combined
Cycle Station and off-site residential and urban areas.
o Material Storage/Controls:
On-site controls are addressed within the SW001 and
SW002 outfalls.
• Storm Water Outfall SW005
o Discharge Structure: 12 -inch diameter CMP culvert
Spare equipment, parts, steel, iron, cable, and
miscellaneous supplies are stored in the large, relatively
flat gravel area. Some fabrication work may also be
performed in the area associated with the steam station
decommissioning effort. Equipment and supplies generally
do not contain liquid.
Storm Water Outfall SW004
o Discharge Structure:
20 -inch diameter CMP culvert
o Location:
West of the steam station powerhouse building
o Drainage area:
2.38 acres
o Area Description:
This outfall conveys flows from the laydown yard and
storage area to the west of the steam station powerhouse
building between the warehouse storage racks and the
maintenance building. Flows in the storage area flow
overland to a ditch leading to the outfall. Area also
includes the oil storage building. Drainage area is gravel
and grassed with some covered roofs.
o Material Storage/Controls:
Oil storage area drains to a 200 gallon sump. Drums of
chemicals, cleaners, batteries, oils, and lubricants were
stored here during plant operation.
Spare equipment, parts, steel, iron, cable, and
miscellaneous supplies are stored in the relatively flat
gravel area. Some fabrication work may also be
performed in the area associated with the steam station
decommissioning effort. Equipment and supplies stored in
the laydown area generally do not contain liquid.
Former NPDES Outfall 004
o Discharge Structure: 10 -foot diameter corrugated steel pipe
o Location: Service water settling pond outfall pipe
o Drainage area: 147 acres on-site and 600 acres offsite
o Area Description: This outfall conveys overflows from the service water
settling pond. This includes the outfalls for the Combined
Cycle Station and off-site residential and urban areas.
o Material Storage/Controls:
On-site controls are addressed within the SW001 and
SW002 outfalls.
• Storm Water Outfall SW005
o Discharge Structure: 12 -inch diameter CMP culvert

o Location:
West of the steam station powerhouse
o Drainage area:
0.07 acres
o Area Description:
This outfall conveys overland flows travel/working area on
o Drainage area:
the west side of the steam station powerhouse.
o Material Storage/Controls:
This outfall conveys overland flows from the construction
No appreciable material storage is currently underway in
storage, parking and laydown area and a much larger
this area. The area will be impacted in the future by
wooded area on the west side of the combined cycle
temporary laydown and staging of materials during the
station.
decommissioning project.
Storm Water Outfall SW006
o Discharge Structure:
8 -inch diameter CMP culvert
o Location:
West of the steam station powerhouse adjacent to the
miscellaneous supplies are stored in the relatively flat
powerhouse building
o Drainage area:
0.33 acres
o Area Description:
This outfall conveys overland flows from the travel/working
decommissioning effort. Equipment and supplies stored in
area on the west side of the steam station powerhouse.
o Material Storage/Controls:
No appreciable material storage is currently underway in
this area. The area will be impacted in the future by
temporary laydown and staging of materials during the
decommissioning project.
Storm Water Outfall SW007
o Discharge Structure:
Drainage feature/ditch outfall to service water settling pond
o Location:
North of Combined Cycle Station outfall
o Drainage area:
21.12 acres
o Area Description:
This outfall conveys overland flows from the construction
storage, parking and laydown area and a much larger
wooded area on the west side of the combined cycle
station.
o Material Storage/Controls:
No appreciable material storage is currently underway in
this area. Spare equipment, parts, steel, iron, cable, and
miscellaneous supplies are stored in the relatively flat
gravel area. Some fabrication work or stockpiling may also
be performed in the area associated with the steam station
decommissioning effort. Equipment and supplies stored in
the laydown area generally do not contain liquid.
Storm Water Outfall SW008
o Discharge Structure:
Drainage feature/ditch outfall to service water settling pond
o Location:
North of Combined Cycle Station outfall
o Drainage area:
8.46 acres
o Area Description:
This outfall conveys overland flows from the construction
storage, parking and laydown area and a much larger
wooded area on the west side of the combined cycle
station.
o Material Storage/Controls:
No appreciable material storage is currently underway in
this area. Spare equipment, parts, steel, iron, cable, and

miscellaneous supplies are stored in the relatively flat
gravel area. Some fabrication work or stockpiling may also
be performed in the area associated with the steam station
decommissioning effort. Equipment and supplies stored in
the laydown area generally do not contain liquid.
Future Storm Water Outfall SW009
o Discharge Structure: 6-8 inch diameter HDPE pipe from pump discharge
o Location: Service Water Settling Pond south of SW002
o Drainage area: 45.0 acres
o Area Description: This outfall will convey noncontact storm water flows from
drainage areas DA -A, DA -B, and DA -C by pump to the
service water settling pond. Areas will be discharged only
after contact water generating sources have been removed
from the areas, including, but not limited to coal or coal
combustion products. Currently these flows are pumped to
the primary ash pond for treatment.
o Material Storage/Controls:
No appreciable material storage is planned for these
areas.
Future Storm Water Outfall SW010
o Discharge Structure: 6-8 inch diameter HDPE pipe from pump discharge
o Location: Service Water Settling Pond south of SW002
o Drainage area: 77.8 acres
o Area Description: This outfall will convey noncontact storm water flows from
drainage areas DA -D, DA -E, and DA -F by pump to the
north side of the secondary ash pond dike. Areas will be
discharged only after contact water generating sources
have been removed from the areas, including, but not
limited to coal or coal combustion products. Currently
these flows are pumped or discharged by gravity to the
secondary ash pond for treatment. This area includes the
existing dry ash stacks. Construction in this area that
would generate potential contact water will be managed to
discharge to the secondary ash pond for treatment.
o Material Storage/Controls:
No appreciable material storage is planned for these
areas. However, future construction in the area of the ash
stacks may result in generation of contact water which will
be discharged to the secondary ash basin, as is the
current protocol.

Dan River Steam Station
Stormwater Monitoring- July 2014
Stormwater samples were collected from ten Dan River Steam Station stormwater outfalls (see attached
table) during a storm event on July 15, 2014, measuring 1.6 inches. Manual grab sampling was initiated
within 15 minutes after rainfall began on-site. Samples were collected directly into properly preserved bottles
and shipped on ice to Duke Energy's analytical laboratory in Huntersville, NC.
Analytical parameters for analysis were: TSS, TDS, Oil &Grease, Cl, SO4, F, COD, Al, As, B, Ba, Ca, Cd,
Cu, Cr, Fe, Mn, Mo, Mg, Ni, Pb, Sb, Se, Tl, Zn, Hardness and Hg. Storage and preservation techniques of
the samples after collection, and prior to analyses, were followed according to Appendix A.
Analyses were conducted by Duke Energy's Huntersville analytical laboratory(NC Wastewater Certification
#248) and Pace Analytical Laboratories (NC Wastewater Certification # 12). Laboratory analytical methods
used for each parameter are provided in Table 1 and analytical results are presented in Appendix B.

Table 1.
Parameter
Method
Reporting
Limit
Units
L�
COD
HACH8000
20
mg/L
DukeEnergy
Chloride
EPA300.0
1
mg/L
DukeEnergy
Fluoride
EPA300.0
1
mg/L
DukeEnergy
Sulfate
EPA300.0
1
mg/L
DukeEnergy
011andGrease
EPA1664B
5
ug/L
PaceAnaltyical
Mercury(Hg)
EPA245.1
0.05
ug/L
DukeEnergy
Aluminum(Ai)
EPA200.7
0.005
mg/L
DukeEnergy
Barium(Ba)
EPA200.7
0.005
mg/L
DukeEnergy
Boron(B)
EPA200.7
0.05
mg/L
DukeEnergy
Calcium(Ca)
EPA200.7
0.01
mg/L
DukeEnergy
Hardness
EPA200.7
0.19
mg/L(CaCO3)
DukeEnergy
Iron(Fe)
EPA200.7
0.01
mg/L
DukeEnergy
Magnesium(Mg)
EPA200.7
0.005
mg/L
DukeEnergy
Manganese(Mn)
EPA200.7
0.005
mg/L
DukeEnergy
Zinc(Zn)
EPA200.7
0.005
mg/L
DukeEnergy
Antimony(Sb)
EPA200.8
1
ug/L
DukeEnergy
Arsenic(As)
EPA200.8
1
ug/L
DukeEnergy
Cadmlum(Cd)
EPA200.8
1
ug/L
DukeEnergy
Chromium(Cr)
EPA200.8
1
ug/L
DukeEnergy
Copper(Cu)
EPA200.8
1
mg/L
DukeEnergy
Lead(Pb)
EPA200.8
1
ug/L
DukeEnergy
Molybdenum(Mo)
EPA200.8
1
ug/L
DukeEnergy
Nickel(NI)
EPA200.8
1
ug/L
DukeEnergy
Selenium(Se)
EPA200.8
1
ug/L
DukeEnergy
Thailium(TI)LowLevel
EPA200.8
0.2
ug/L
DukeEnergy
TDS
SM2540C
25
mg/L
DukeEnergy
TSS
SM2540D
5
mg/L
DukeEnergy

Appendix A
Sample Preservation and Hold times

Parametername
Container'
P_reservation22
Maximumh I in t
ime"
Table IB—fnorganicTests:
1.Acidity
P, FP,G
C001,56°C'"
14days.
2.Alkalinity
P, FP,G
C001,s6°C",
14days.
4.Ammonia
P, FP,G
Coo1,s6°C",H2SO4topH <2
28days.
9.13iochemical oxygendemand
P, FP,G
Cool,s6°C'"
48hours.
10,Boron
P, FP,orQuartz
HNO,topH <2
6months.
11.19romide
P, FP,G
Nonerequired
28days.
14.Biochemical oxygendemand,carbonaceous
P, FP G
Cool,s60C'"
48hours.
15.Chemical oxygendemand
P, FP,G
CooIA60C78,H2SO,topH <2
28days.
16.Chloride
P, FP,G
Nonerequired
28days.
17.Chlorine,totairesidual
P, G
Nonerequired
Analyzewithin15
minutes.
21.Color
P, FP,G
Cool,s6°C",
48hours.
23-24.Cyanide,total or available(or CRTC) andfree
P, FP,G
Cool,s6°C'",NaOHtopH a10'
14days.
°,reducingagentgoxidizer
present
25.Fluoride
P
Nonerequired
28days,
27.Hardness
P, FP,G
HNO3or H2SO4topH <2
6months.
28.Hydrogen ion (pH)
P, FP,G
Nonerequired
Analyzewithinl5
minutes.
31,43. Kfeldahlandorganic N
P, FP,G
Cool,s6°C1',H2SO,topH <2
28days.
Table IB—Metals:'
18.Chromium VI
P, FP,G
Cool,s60C'",pH=9.3-9.7"'
28days.
35. Mercury(CVAA)
P, FP,G
HNO3topH <2
28days.
35. Mercury(CVAFS)
FP, G; andFP-
5mUL12N HClor SmULBrCI"
90days."
lined cap"
3,5-8,12,13,19, 20,22,26,29,30,32-34,36,37, 45,
P, FP,G
HNO3topH <2,or atleast 24
6months,
47,51, 52,58-60,62, 63,70-72, 74,75.Metals,except
hoursprior toanalysis19
boron,chromium V1,andmercury
38.Nitrate
P, FP,G
Cool,s60C"
48hours.
39.141trate-nitrite
P, FP,G
Cool,560C'",HAO,topH <2
28days.
40.Nitrits
P, FP,G
Cool,s60C",
484ours.
41.0ilandgrease
G
Coolto56°C'a, HClor H2SO410
28days.
pH <2
42.OrganicCarban
P, FP,G
Cool tos6°C78, HCI, H2SO4, or
28days.
H3PO4topH <2
44.Orthophosphate
P, FP,G
Cool,tos6°C1tl24
Filler within 15minutes;
Analyzewithin48
hours.
46.Oxygen,DissolvedProbe
G, Bottleandtop
Nonerequired
Analyzewithinl5
minutes.
47. Winkler
G, Bottleandtop
Fixon siteandstoreindark
Shours.
48.Phenots
G
Cool,s60CtB,H2SO,topH <2
28days.
49,Phosphorous(elemental)
G
Cool,s6°C'"
48hours.
50,Phosphorous,total
P, FP,G
Cool,560C'O,H2SO4topH <2
28days.
53.Residue,tatal
P, FP,G
Cool,s600
7days.
54.Residue, Filterable
P, FP,G
C001,566C",
7days.
55.Residue,Nonfilterable(TSS)
P, FP,G
Cool,56°C'`
7days.
56.Residue, Settleable
P, FP,G
Cool,s6°C'"
48hours.
57.Residue, Volatile
P, FP,G
C001,56°C",
7days.
61.Silica
Por Quartz
Coo1,560C",
28days.
64.Specificconductance
P, FP,G
Cool,56°01
28days.
65.Sulfate
P, FP,G
Cool,s6`0
28days.
66.Sulfide
P. FP,G
Cool,s6"C'",addzinc acetate
7days.
plus sodiumhydrobde topes >9
67.Sulfite
P, FP,G
Nonerequired
Analyzewithinl5
minutes.
68.Surfactants
P, FP,G
Cool,s6%C"`
48hours.
69.Temperature
P. FP,G
Nonerequired
Analyze.
73.Turbidity
P, FP,G 1
Cool,s6"C1"
48hours.
"P"isforpolyelhylens;"FP"isfluoropolym er(polytetrafluoroethylene( PTFE); Teflon,"),orotherfl uoropolymer,unlessstatedotherwise
InthisTablell;"Gisgiass;"PA"isanyplasticthatismadeofastedlizablematedal(polypropyleneorotherautoclavableplastic);"LDPE"is lowdensity
polyethylene.
Exceptwherenotedin thisTablellandthemethodfortheparameter,preserve eachgrab samplewithinl5minutes of collection. For a
compositesamplecollectedwithanautomatedsample(e.g.,usinga24-hourcompositesample,see40CFR122.21(g)(7)(i)or4OCFRPart
403,AppendixE),refrigeratethesampleats6,CduringcollectionuniessspecifiedotherMseinthisTablellorinthemethod(s).Fora
compositesampletobesplitintoseparatealiquotsforpreservationand/oranalysis..maintainthesampleat56°C,unlessspecifiedotherwise
inthisTablel lorinthemethod(s),untilcollaction,splitting,andpreservationiscompleted. Addthepreservativetothesamplecontainerpdor
tosam plecollectionwhenthepreservativewillnotcompromisetheintegdtyofagrabsample. acom positesample,oraliquotsplitfroma

composite samplewithinl5minutesotcollection.Ifa compositemeasurernentisrequiredbuta composite samplewouldcompromise sample
integdty,individualgrab samples mustbe collectedatprescribed timeintenrals(e.g„4 samplesover the courseofaday,at 6-hourintervals).
Grabsamplesmustbeanalyzedseparatelyandthe concentrationsaveraged.Altematively,grab samplesmaybecollectedinthe Ifeldand composited
Inthe laboratoryifthe compositingprocedureproducesresultsequivalenttoresultsproducedbyadthmeticaveragingolresultsof
analysisofindividualgrabsamples.Forexamplesoflaboratorycompositfngprocedures,seeEPAMethodl664Rev.A(oilandgrease)and the procedures
at 40CFR 141.34(t)(14)(iv) and(v) (volatileorganics).
I ranspor[ationHazardousMateriaisRegulations(49CFR partl72).Thepersonoffedng such materialfortransportation isresponsiblefor ensuringsuch
compliance. Forthepreservationrequirementorrabiell,the OfficeofHazardousMatedals,MateriaisTransportation Bureau,
Departmentorrransportation hasdelermined that theHazardousMatedalsRegulaUonsdo notapply tothe foliowingmateriats:Hydrochlodc
acid(HCI)inwater solulionsat conceniralionso(0.04%by weightodess(pHabout1.96orgreater; Nitdcacid(HNO3)inwater solutionsat
concentrabonsof0.15%by weightodess(pHaboutl.62orgreater);Sulfuricacid(HzSOA)inwater solutionsat concentrationsof0.35%by weightodess(pH
about1.15orgreater);and Sodiumhydroxide(NaOH)Inwater solutionsatconcentrationsof0.080%by weightodess(pH aboutl2.30odess).
°Samplesshouldbeanalyzedassoonaspossibleafter collection.Thetimeslistedarethe maximum timesthatsamplesmaybeheld
beforethestartofanalysisandstillbeconsideredvalld.Samplesmaybehetdforlongerpedodsonlyifthepermitteeor monitoringlaboratory
hasdataonfiletoshowthat,forthespecifictypesofsamplesunderstudy,theanalytesarestabieforthelongertim e,andhasreceiveda
vadancefromtheRegionalAdminislratorunderSec.136.3(e).Foragrabsample,theholdingtimebeginsatthetimeofcollecbon. Fora
composite samplecollectedwithanautomatedsampler(e.g.,usinga24-hourcompositesampler;see 40CFRI22.21(a)M01or40CFRDart
knowsthatashortertimeisnecessarytomaintainsampieslability.Seel 36.3(e)fordetalls.Thedateandtim eofcollectionofanindividual
grabsampleisthedateandtimeatwhichthesampleiscollected.Forasetofgrabsamplestobecomposited,andthatareallcollectedon the samecalendar
date, thedateofcollectfon is thedate onwhichthe sampiesarecollected. For asetofgrabsamples tobecomposited,and
thatarecollectedacrosstwocalendardates,thedateofcollectionisthedatesofthetwodays;a.g.,Novemberl4-15.Foracomposite sample
collectedautomaticallyon agivendate,thedateof collectionisthedateonwhichthesampteiscollected.Foracomposite sample
collectedautomatically,andthatiscollectedacrosstwocalendardates,thedateofcollectionisthedatesofthe twodays;e.g.,Novemberl4-
15.Forstatic-renewaltoxicitytests,eachgraborcompositesamplemayalsobeusedtopreparetestsolutionsforrenewalat24h,48h, andlor 72h
afterfirstuse, Ifstoredat0.6°C, Wthminimumhead space.
5ASTMD7365-09aspecif estreatmentoptionsforsamplescontainingo)ddants(e.g.,chlorine).Also,Section9060AofStandard
MelhodsfortheExaminationofWater andWastewater (20thand2lst editions) addresses dechlorinationprocedures.
eSampling, preservationandmiflgatinginterferences Inwater samplesfor analysis of cyanidearedescdbedirtASTM D7365-09a.There
measuresdescribedin theanatytical testmethod. Anyremovalor suppressiontechniquenotdescdbedinD7365-ogaortheanalyticaftest
methodmustbedocumentedalongwfth supportingdola.
'Fordissolvedmetals,filtergrabsampleswfthinl5minutesof cellectionandbeforeaddingpreservatives.Fora composite sample
collectedwithanautomated sampler(e.g.,usinga24-hour composite sampler; see40CFR 122.21(g)(7)(i)or40CFR Part403,Appendix E),
filterthesamplewithin 15minutesaftercompletionofcollectionandbeforeaddingpreservatives.Ifitisknownorsuspectedthatdissolved
sampleintegrity willbe compromisedduring collectionofacomposite samplecollected automatically over time(e.g.,by Interchange ofametal
betweendissolvedandsuspendediorms). collectandffltergrabsamplestobe composited(footnote2)inplaceofacompositesample
collectedautomatically.
°Guidanceapplies tosamples tobeanalyzedby GC,LC, or GC/MS for specific compounds.
°if thesamplels not adjustedtopH 2, then thesamplemustbeanalyzedwithin sevendays of sampling.
10ThepH adjustment Isnotrequiredifacroleinwiltnotbemeasured. Samplesfor acroleinreceivingnopH adjustment mustbeanalyzed
within3daysofsampling,
”WhentheextractableanalytesofconcemfallWthinasinglechemlcalcalegory.thespecifiedpreservativeandmaximumhotding times shouldbe
observed for oplimumsaleguardofsampleintegdty(i.e.,useall necessary preservativesandholdfor theshortest timelisted).
When theanalylesofconcem fallWthin twoor more chemicalcategories. the samplemay bepreservedby cooling tos6°C,reducingresidual
chlodnewith0.008°.sodiumthiosulfate..stadngin thedark,andadjusting thepH to6-9;samplespreservedin this mannermaybeheld for
sevendaysbeforeextractionandforfortydaysafterextraction. Exceptionsto thisoptionalpreservationandholdingtimeprocedurearenoted in
footnote5(re?gardingtherequirement for thiosulfatereduction), and footnotesl2,13(regarding theanalysis ofbenzidine).
' If1,2-diphenylhydrazineis likelyto bepresent, ad)ust thepH of thesamplelo4.0t0.2topreventrearrangement tobenzidine.
"Extracts may bestaredupto30daysat <0°C.
14 For theanalysis ofd=phenylnitrosamine.add0.008'n Na2&0.)andad)ust pH to7-10withNaOHWthln24 hoursof sampling.
tSThepHadjustmentmaybeperformeduponreceiptatthelaboratoryand maybeomittedifthe samplesareextractedwithin72hours
of collection. Forlheanalysis of aldrin,add0.006%Na2SZ03.
1ePlace sufficientice wfththe samplesinthe shipping containertoensurethaticeisstillpresentwhenthesamplesarriveatthe
laboratory, However,evenificeispresentwhenthesamplesardve.immediatelymeasurethetemperatureohhesamplesandconfirmthat
thepreservationtemperaturemaximumhasnotbeenexceeded. tntheisolatedcaseswhereit canbedocumentedthatthisholding
lemperaturecannotbemet,thepermitteecanbegiventheoptionofon-sitetestingorcanrequestavariance.Therequesfforavadance
shouldincludesupportrvedatawhichshowthattheto)acityoftheeffluentsamplesisnotreducedbecauseoftheinereasedholding
temperature.Aqueoussamplesmustnotbefrozen. Mand-deliveredsam pl esusedonthedayofcollectiondonotneedtobecooledtoOto6
C prior_totest initiation
'. Sam plescollectedforlhedeterminatfonoftracelevelmercury(<100ng/L)usingEPAMethod1631mustbecollectedintightiy-
cappedfluoropolymerorglassbottlesandpreserved W thBrClorHClsolutionwithin48hoursotsamplecollection.Thetimetopreservation
tilteredinthelaboratorywithin24hoursofthetimeofcallection, However,ifcircumstancesprecludeovemightshipment,thesamplesh
befilteredinadesignatedcleanareaintheffeldinaccordanceWthproceduresgiveninMethod 1669. Ifsampleintegdtywfllnotbe
maintainedbyshipmenttoandfiltrationinthelaboratory,thesamplemustbefilteredinadesignatedcleanareaintheffeld W thinthetime

pedodnecessarytomaintainsampleintegdty.Asamplethathasbeencollectedfordeterminationottotalordissolvedtracelevelmercury
mustbeanalyzed within90days of samplecollection.
`BAqueoussamples mustbepreservedats60C,and shouldnotbe frozenunlessdatademonstrating thatsample freezingdoesnot
adversely impactsampleintegrity is maintainedon fileandacceptedasvalidby theregulatory authority.Also,forpurposesofNPDES
monitoring,thespecificationof"5°C"isusedinplaceohhe"4°C"and"<4°C"sampletemperaturerequirementslistedinsomemethods.Itis
noinecessarytomeasurethesampletemperaturetothreesignificantfigures(1l100thof 1 degree); rather,threesignificantfiguresare
specifiedsothatroundingdownto6°Cmaynotbeusedtomeetthes6°Crequirement.Thepreservationtemperaturedoesnotapplyto
samples thatareanatyzedimmediately (less thanl5minutes).
7°Anaqueoussample maybecoliectedandshippedwithoutacidpreservation.However,acid mustbeaddedatleast24hoursbefore
analysistodissolveanymetalsthatadsorbtothecontainerwalls.lithesample mustbeanalyzedwithin24hoursolcollection,addtheacid
Immediately (seelootnote 2). Soiland sediment samplesdonotneed tobepreservedwithacid. The allowancesin this
footnotesupersede the
preservationandholdingtimerequfrements intheapprovedmetaismethods.
76Toachievethe28-dayholdingtime,use theammonium sulfatebuffersolutionspecifiedinEPAMethod218.6.Theallowanceinthis
footnotesupersedespreservationandhotdingtimerequirementsintheapprovedhexavalenichromiummethods, unlessthissupersession
would compromisethemeasurement,inwhichcaserequirements inthemethodmustbefollowed.
the timeof samplefiltrationtoelution forsamples filteredinthefield.
22Sampleanalysisshouldbeginassoonaspossibleafterreceipt,,sampleincubationmusibestartednolaterthan8hoursfromtimeof
collection.
2317or fecalcoliformsamples for sewagesludge(biosolids)only,theholding timeisextended to24hoursfor the following sample
types usingeither EPA Method1680(LTB-EC) or 1681(A-1):Class Acomposted, Class B aerobically digested,andClass B
anaerobically digested.
a`Theimmediatefiltrationrequirementinorthophosphate measuremenlisto assessthedissolvedorbio-availableformof
orthophosphorus(i, e.,thatwhichpassesthrougha0.45-micronfflter),hencetherequirementtofilterthesampleimmediatelyuponcollection
(i.e., withinl5minutesof collection).
[38 FR 28758, Oct.16,1973

Appendix B
Analytical Data

Parameter
Units
SWO07
SWOOS
Not in
Supplemental
Information=
SWO04=
SWO03=
SWOO5
Former
NPDFS
Outfall
009
SWOOI/
SW002
SWO06
Drains to
Future
Outfall
SWO10
Oil & Grease
mg/I
<
5.0
<
5.0
<
5.0
<
5.0
< S.0
< 5.0
< 5.0
<
5.0
c
5.0
<
5.0
COD
mg/I
<
20
<
20
23
<
20
< 20
< 20
25
<
20
<
20
23
Cl - Chloride (00940)
mg/I
3.7
<
1
<
1
1.4
3.1
1.5
8.7
14
2.8
12
Fluoride
mg/I
<
1
<
1
<
1
<
1
1
< 1
< 1
<
1
<
1
<
1
504 - Sulfate (009451
mg/I
64
82
2
13
13
13
42
37
49
47
Hg - Mercury (71900)
pg/I
<
0.05
<
0.05
<
0.05
0.16
0.21
0.06
< 0.05
<
0.05
0.25
<
0.05
Al - Aluminum (01105)
mg/I
14.6
8.01
0.275
105
92.9
0.491
0.775
0.541
97.7
2.31
Ba - Barium (01007]
mg/I
0.168
0.115
0.007
0.587
0.563
0.019
0.047
0.074
0.686
0.085
B - Boron (01022)
mg/I
<
0.05
<
0.05
<
0.05
c
0.05
< 0.05
c 0.05
0.198
<
0.05
<
0.05
<
0.05
Ca-Calcium
mg/1
13
37.2
1.55
14
17.7
9.19
24.3
22.1
36.3
28.9
Hardness
mg/I (CaCO3)
77.8
125
4.4
141
144
25.7
82.4
69.4
201
93.2
Fe - iron (OI045)
mg/I
25
13.2
0.319
188
162
0.733
3.83
3.86
182
4.32
Mg-Magnesium
mg/I
11
7.8
0.129
25.8
24.3
0.668
5.28
3.44
26.8
5.11
Mn - Manganese (01055)
mg/I
0.71
0.323
0.014
2.37
2.52
0.035
O.S41
1.73
2.37
0.618
Zn - Zinc (01092)
mg/I
0.105
0.056
0.301
0.539
0.702
0.691
0.332
0.04
0.652
0.036
Sb - Antimony (010971
WjI
<
1
<
1
c
1
<
1
< 1
1.53
< 1
<
1
<
1
<
1
As - Arsenic (010021 1
WjI
1.31
<
1
1.41
3.72
4.99
1.35
32.5
<
1
4.29
<
1
Cd - Cadmium (01027)
pg/I
<
1
<
1
<
1
<
1
< 1
1.85
< 1
<
1
<
1
<
1
Cr - Chromium 101034)
µg/I
41.5
22.7
<
1
130
111
6
1.54
1.36
127
5.41
Cu - Copper (010421
µg/t
18.2
15.2
8.26
103
104
75
33.6
2.17
116
5.89
Pb - lead (01051)
µg/I
11.8
2.74
18.3
66.2
81.8
21.9
4.2
<
1
79.4
1.55
Molybdenum (Mo)
µg/I
<
1
4.23
<
1
<
1
< 1
4.1
14.2
1.72
<
1
2.14
Ni - Nickel (01067)
Ng/1
22.4
11.2
<
1
77.4
76.2
2.39
2.61
2.69
74.8
4.26
Se - Selenium (011471
µg/t
<
1
<
1
6.91
1.99
4.72
10.6
2.96
<
1
6.41
<
1
T1- Thallium (01059)
WjI
0.344
<
0.2
<
0.2
0.81
0.892
< 0.2
< 0.2
<
0.2
0.992
<
0.2
TDS - Total Diss. Solids (70300)
mg/I
100
240
c
25
530
810
76
170
140
600
190
TSS-Total Suspended Solids
mg/1
440
310
7
2700
1700
23
31
28
2600
62
pH
S.U.
6.5
6.44
6.77
7.27
7.08
7.35
7.47
7.82
7.37
7.55
Temperature
'C
277
27.8
26.7
27.9
29.3
25.8
23.1
27
24.1
25.9
Specific conductance
PS/cm
169
197
18.7
58.5
77.9
78.3
253
193.3
179.7
244
Notes: 1 Roof drain from the retired powerhouse building
a SWO03, SWO04 were obtained from areas undergoing temporary construction

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