NC0024406_Proposed Monitoring Well Locations Approval_20101019

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NCDENPv-
North Carolina Department of Environment and Natural resources
Division of Water Quality
Beverly Eaves Perdue Coleen H. Sullins
Governor Director
October 19, 2010
Mr. Allen Stowe
Water Management
Duke Energy Corporation
EC 13K / Post Office Box 1006
Charlotte, North Carolina 28201-1006
Subject: Proposed Monitoring Well Locations Approval
Belews Creek Steam Station
Permit NCO024406
Dear Mr. Stowe:
Dee Freeman
Secretary
As stated in the October 14, 2010 letter from our Winston-Salem Regional Office, the Aquifer Protection
Section (APS) has approved your proposed well locations for the above -referenced site. You may
proceed with the monitoring well installations at this time if you have not already done so. The attached
Groundwater Monitoring Plan and proposed Monitoring Well Location Map have been forwarded to our
National Pollution Discharge Elimination (NPDES) permit group for inclusion in the above -referenced
permit.
As required by Section 2(c) of the Groundwater Monitoring Plan, within 60 days of the well construction,
a fmal version of the map shall be submitted to the APS at the address listed at the bottom of this letter.
Upon receipt, the APS will update your NPDES permit with this new map. If you have any questions,
please feel free to contact Eric Smith at [phone] or me at [phone].
Sincerely,
aK" _j ' wzt
Debra J. Watts
Supervisor — Groundwater Protection Unit
Attachments
cc: APS- WSRO w/ attachments
APS Central Office Files w/ attachments
F�""S_WP--- NPDES-(Ser-gei-Chernikov)-w/ a t chments,
AQUIFER PROTECTION SECTION
1636 IViail Service Center, Raleigh, North Carolina 27699-1636 ape t t
Location: 2728 Capital Boulevard, Raleigh, North Carolina 27604 1vT01 �tl ®il 11
Phone: [phone] FAX 1: 919-715-0588; FAX 2: 919-715-6048 \ Customer Service: 1-877-623-6748
Internet: vvww.ncwateroualitv.org
An Equal Opportunity t Affirmative action Employer

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GROUNDWATER MONITORING WELL CONSTRUCTION AND SAMPLING
1. The permittee shall conduct groundwater monitoring as may be required to determine
the compliance of this NPDES permitted facility with the current groundwater Standards
found under 15A NCAC 2L.0200.
2. WELL CONSTRUCTION. .Within 120 days of permit issuance, monitoring wells, as
proposed on the Attachment, shall be installed to monitor groundwater quality.
a. Shallow (S) monitoring wells shall be constructed such that the water level in
the monitoring well is never above or below the screened (open) portion of the
well at any time during the year. Deep (D) monitoring wells shall have screen(s)
at designated intervals in the water column below the static shallow
groundwater level. The deep wells should be constructed such that the
screened portion is discrete and situated in the transition zone between
competent bedrock and the regolith. Monitoring wells shall be constructed in
accordance with 15A NCAC 02C .0108 (Standards of Construction for Wells
Other than Water Supply) and any other jurisdictional laws and regulations
pertaining to well construction. The general locations for all monitoring wells
are indicated on the Attachment.
b. The Mooresville Regional Office, telephone number [phone] shall
approve the location of new monitoring wells prior to installation. The regional
office shall be notified at least 48 hours prior to the construction of any
monitoring well and such notification to the Aquifer Protection Section's
regional supervisor shall be made from 8:00 a.m. until 5:00 p.m. on Monday
through Friday, excluding State Holidays.
c. Within 60 days of completion of the monitoring wells, the Permittee shall
submit two original copies of a site map with a scale no greater than 1 -inch
equals 500 feet. At a minimum, the map shall include the following
information:
i. The location and identity of each monitoring well.
ii. The location of major components of the waste disposal system.
iii. The location of property boundaries within 500 feet of the disposal
areas.
iv. The latitude and longitude of the established horizontal control
monument.
V. The elevation of the top of the well casing (i.e., measuring point)
relative to a common datum.
vi. The depth of water below the measuring point at the time the
measuring point is established.
vii. The location of compliance and review boundaries.
viii. The date the map is prepared and/or revised.
ix. Topographic contours in no more than ten (10) foot intervals
d. The above information should be overlaid on the most recent aerial photograph
taken of the site. Control monuments shall be installed in such a manner and
made of such materials that the monument will not be destroyed due to
activities taking place on the property. The map and any supporting
documentation shall be sent to the Division of Water Quality, Aquifer Protection
Section, 1636 Mail Service Center, Raleigh, NC 27699-1636.
e. The well(s) must be constructed by a North Carolina Certified Well Contractor,
the property owner, or the property lessee according to General Statutes 87-
NPDES Well Construction and Groundwater Monitoring Pagel of 4 10/19/2010

98.4. If the construction is not performed by a certified well contractor, the
property owner or lessee, provided they are a natural person, must physically
perform the actual well construction activities.
f. The monitoring wells shall be regularly maintained. Such maintenance shall
include ensuring that the well caps are rust -free and locked at all times, the
outer casing is upright and undamaged, and the well does not serve as a conduit
for contamination.
3. GROUNDWATER SAMPLING. Monitoring wells shall be sampled after construction and
thereafter at the frequencies and for the parameters as specified in the Attachment. All
mapping, well construction forms, well abandonment forms and monitoring data shall
refer to the permit number and the well nomenclature as provided on the Attachment.
a. Per 15A NCAC 02H .0800, a Division certified laboratory shall conduct all
laboratory analyses for the required effluent, groundwater or surface water
parameters.
b. The measurement of water levels shall be made prior to purging the wells. The
depth to water in each well shall be measured from the surveyed point on the
top of the casing. The measurement of pH shall be made after purging and prior
to sampling for the remaining parameters.
C. The measuring points (top of well casing) of all monitoring wells shall be
surveyed to provide the relative elevation of the measuring point for each
monitoring well. The measuring points (top of casing) of all monitoring wells
shall be surveyed relative to a common datum.
d. For initial sampling of monitoring wells, the Permittee shall submit a Compliance
Monitoring Form (GW -59) and a Well Construction Record Form (GW -1) listing
this permit number and the appropriate monitoring well identification number.
Initial Compliance Monitoring Forms (GW -59) without copies of the Well
Construction Record Forms (GW -1) are deemed incomplete, and may be
returned to the Permittee without being processed.
e. Two copies of the monitoring well sampling and analysis results shall be
submitted on a Compliance Monitoring Form (GW -59), along with attached
copies of laboratory analyses, on or before the last working day of the month
following the sampling month. The Compliance Monitoring Form (GW -59) shall
include this permit number, the appropriate well identification number, and one
GW -59a certification form shall be submitted with each set of sampling results.
All information shall be submitted to the following address:
Division of Water Quality
Information Processing Unit
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
4. COMPLIANCE BOUNDARY. The compliance boundary for the disposal system shall be
specified in accordance with 15A NCAC 02L .0107(a). This disposal system was
individually permitted prior to December 30, 1983; therefore, the compliance boundary
is established at either 500 feet from the effluent disposal area, or at the property
boundary, whichever is closest to the effluent disposal area. An exceedance of
groundwater standards at or beyond the compliance boundary is subject to remediation
NPDES Well Construction and Groundwater Monitoring Page 2 of 4 10/19/2010

action according to 15A NCAC 02L .0106(c) as well as enforcement actions in accordance
with North Carolina General Statute 143-215.6A through 143-215.6C.
NPDES Well Construction and Groundwater Monitoring Page 3 of 4 10/19/2010

ATTACHMENT — GROUNDWATER MONITORING PLAN
Permit Number: NCO024406 Version 1.0
WELL
NOMENCLATURE
PARAMETER DESCRIPTION
FREQUENCE'
Monitoring Wells:
MW -2005, MW -2001)';
MW -201-S, MW 201D,
MW -202S, MW -2021),
MW -203S, MW -203D,
MW -204S, MW -2041)
Antimony
Chloride,
Manganese
Sulfate
March, June,
September.
Arsenic Chromium Mercury TDS
Barium Copper Nickel Thallium
Boron Iron Nitrate Water Level
Cadmium Lead, H Zinc
Selenium -
Note 1: For locations of monitoring wells, see attached map.
Note 2: Monitoring revisions may be considered, as applicable, if there are no significant detections prior to permit
renewal.
NPDES Well Construction and Groundwater Monitoring Page 4 of 4 10/19/2010 .

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NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue Coleen H. Sullins
Governor Director
February 10, 2010
Ron Lewis
Water Management, Duke Energy
EC13K
PO Box 1006
Charlotte, NC 28201-1006
Dee Freeman
Secretary
Subject: Review of Duke Energy Carolinas, NPDES Permit NCO024406 "Assessment of Balanced and Indigenous
Populations in the Dan River near Belews Steam Station", January 2010.
Environmental Sciences Section staff has reviewed the subject document. Eric Fleek, Jeff Deberardinis, and Debra Owen
have reviewed the sections on macroinvertebrates, fish tissue, and water/sediment chemistry respectively. By agreement
with the Department of Environment and Natural Resources (NCDENR), Duke Energy conducts annual monitoring of the
Dan River in the vicinity of the Belews Steam Station to support NPDES Permit NC0024406. The power plant operates
under an DWQ- and EPA -approved Clean Water Act §316(a) thermal variance which stipulates certain effluent limitations
and monitoring requirements such that the thermal component of the discharge assures the protection and propagation of
a balanced, indigenous population of shellfish, fish, and wildlife in and on the body of water into which the discharge is
made and that water quality temperature standards must be maintained outside the approved 316 (a) mixing zone.
Based on a review of the data, it is our opinion that the benthic macroinvertebrate communities currently found in the Dan
River near the vicinity of the Belews Creek Steam Station qualify as a balanced and indigenous community. Furthermore,
a review of the assessed fish tissue contaminants found in the Dan River near the vicinity of the Belews Creek Steam
Station also show no contaminant levels above background levels below the steam station.
However, at this time we offer the following requests for future reports:
Analysis Requests
1. In addition to Figures 3-2 and 3-3 and 3-4, please include the following graphs for each station and year (in the
same format as currently presented) for the following groups: Non-Chironomid Diptera, ,Ephemeroptera,
Plecoptera, Trichoptera, Coleoptera, Odonata, Megaloptera, Crustacea, and Mollusca. This request will allow for
a more direct side-by-side comparison for each station and each taxonomic group.
If you have any questions, please do not hesitate to contact me or my staff.
cc: Rob Krebs, Mooresville Regional Office
Jeff Poupart, Surface Water Protection Section
Sergei Chernikov, Surface Water Protection Section
Bryn H. Tracy, Environmental Sciences Section
Charles Weaver, Surface Water Protection Section
1621 Mail Service Center, Raleigh, North Carolina 27699-1621
Location: 4401 Reedy Creek Road, Raleigh, North Carolina 27607
Phone: [phone] FAX: [phone] Customer Service: 1-877-623-6748
Internet: http:llh2o.enr.state.nc.uslesbl
An Equal Opportunity 1 Affirmative Action Employer
Sincerely,
U�
Jay Sauber
Chief, Environmental Sciences Section
NorthCarohna
AMUM11Y