20150998 Ver 1_Meeting Notes 02-14-17_20170214

AGENDA
February 14, 2017
1. Safety
U. Introductions
Ui Overview ofObjectives
IV. Sutton Closure Permitting (1O45am—Il:8Oam)
a. Sutton NPDE5Permit Overview
b. Ash Pond Closure Project Impacts
c. Path forward
V. 402/404Regulatory Overlap Discussion (12/OOpnn-2:3Opm)
a. Past interpretations of4O4/4U2overlap, engineered features
b. Seep permitting assornption«/cur/en1path
c. Seep examples and discussion
d. Mitigating actions

LEGEND
OUTLINE
_ APPROXIMATE M 1984 ASH / �\ APPROXIMATE COOLING POND/CANAL OUTLINE
OUTLINE OF 1971 ASH BASIN BASIN —. % �\
— _ r � 1971 ASH _
— HA -1'1 y / BASIN / \ APPROXIMATE LOLA AND ASH BASIN OUTLINE
— — — NO CCR _' NEWHA-004-B-1 �
_ EL 26.7' APPROXIMATE PROPERTY BOUNDARY
HA -1-2 :___ NO CCR \
—
NO CCR — — — — — — — — — — — — DIRT/UNPAVED ACCESS ROAD
— — — - – — — — — — — — — — — — — — —
NEWHA-004-PZ-107
r 7 EL 27.0' _ \ EXISTING MAJOR CONTOUR ELEVATION
:.L NO CCR / — X— X— X— X— X— X— X— X— X— X— FENCE
1 APPROXIMATE OUTLINE
N
NEWHk-00-�-6-2 OF 1984 ASH BASIN MISCELLANEOUS STRUCTURE l CONCRETE
,1 EL 26.2' PAVED ACCESS ROAD
NEWHA-004-PZ-106
HA -2-1 THB-3 EL 27.3' RAIL ROAD
NO CCR 0-5 FT BGS EL 17.5'-2.5'
—----=='----- --- AREA REPRESENTING BATHYMETRY SURVEY (NOTE 2)
10p \� EL 27.5' NEWHA-004-B-
- OUTFALL 00822x00 _- \\ EL `8'-3' EL 27.6' DELINEATED WETLAND (NOTE 11)
(APPROXIMATE) EL 18-4 1
?
t7*00 • \\ ` HA -3-1 1 - - X SG -4+ STAFF GAUGE (NOTE 10)
— — — HA -2-2 79x 0-5.5 FT BGS i
r — — — — NO CCR Op x NEWHA-004-B-1 NEWHA-004-PZ-105
\ HA -3-2 CANAL WETLAND
— — — — — — THB-4 v 76x00 s 0-1.5 FT BGS (NOTE 11) I EL 26 T x EL 27 7' x SOIL BORING
\s., NO CCR EL 19'-6' BORING ID
z — — — — — 0-7 FT BGS --,;
*00\ NEWHA-004-PZ-1 Li;, SPT -1 ELEVATION OF MUDLINE/GROUND SURFACE
THB-2 - _ \ ESTIMATED VERTICAL EXTENT OF CCR IN ELEVATION
1 — — — — — — 0-9.5 FT BGS / 0 EL 27.T EL 27 5' X
N — — — — — — —�- r,
1EL 18
_ 7 \
o— — — — — _ — — THB-1 0*00 \ HAND AUGER BORING (NOTE 8)'
0-9 FT BGS 8x HA -1-1 THB-1 BORING ID
— — — — — — — — — ---- --- -- -- - 0 X X ESTIMATED VERTICAL EXTENT OF CCR IN DEPTH BELOW
61 j — — — — — — — — — - 0 NO CCR 0-9 FT BGS GROUND SURFACE (NOTES 8 AND 9)
_ _ _ _ _ _ _ _ _ PROPOSED SHEET
z /
0 PILE ALIGNMENT - '-' 4*pp •'�
--------2x
0 —_- COOLI G POND —_ —__-- __ ___ _ _
z _(8.5 FT WATER ELEVATION OBTAINED— _ 0x
a _ FROM STAFF GAUGE SG -3, _ LAY OF LAND ~� 00 l NOTES.
DATED 8 MARCH 2016) — \�
w — - — --- --- --- (LOLA) ..._ __�`•-.� \� \ 1- TOPOGRAPHIC FEATURES WERE OBTAINED FROM FILE "SUTTON-TOP020-DWG" PROVIDED BY DUKE ENERGY ON APRIL 23, 2014.
— — — — — — — — _ _ _ _. _ X .�•'•.,
\+ 2. BATHYMETRIC SURVEY FOR THE DISCHARGE CANAL AND COOLING POND TO THE WEST OF BASINS WAS PROVIDED BY WSP, TITLED
_ _ _ "GEOTECHNICAL / ENVIRONMENTAL INVESTIGATION LOCATIONS & BATHYMETRIC SURVEY", FILE NAME SUTTON WELL BASE DWG. DATED
v — — — — X— X— x— x � DISCHARGE CANAL , + JUNE 12, 2014, BATHYMETRIC SURVEY FOR THE COOLING POND TO THE WEST OF LOLA WAS CONDUCTED ON MARCH 22, 2016 AND
-- --- --- / _ _- PROVIDED BY WEIR TITLED "BATHYMETRIC SURVEY L -V. SUTTON ENERGY COMPLEX PORTION OF COOLING POND AND CANAL", FILE NAME
� — — — — (8.5 FT WATER ELEVATION %
— — — — -__. __ __. ._ `- SUTTON SE COOLING POND DWG
w _ _ _ _ _ OBTAINED FROM STAFF -- z• �\
Of
— — — — — — — GAUGE SG -4, DATED 8 MARCH 2016) 3. COORDINATES AND DIRECTIONS SHOWN ON THIS DRAWING ARE BASED ON NORTH CAROLINA STATE PLANE COORDINATE SYSTEM
___
\ NCGRID/NAD83(2011)-
— --- — — — — __ _ ._ _ _ __ - _ _ IR '..� ••-� ,� 4. ELEVATIONS ON THIS FIGURE ARE REFERENCED TO NAVD88 VERTICAL DATUM.
II -- 5. APPROXIMATE PROPERTY LINE BOUNDARY AND COOLING POND OUTLINE WERE OBTAINED FROM THE NORTH CAROLINA NEW HANOVER
TE HTTP-/lWVNN NHCGOV COM/GIS DATA AVAILAB FDR DOWNLOAD PARCEL SHAPE FILE DATA AND MISCELLANEOUS
w F PROPERTY LINES RESPECTIVELY, LAST UPDATE ON AUGUST 10, 2005.LE ,
'\ � COUNTY GIS WEBSITE /
APPROXIMATE OUTLINE
Ln
O COOLING BASIN (NOTE 5) _ — — _ _ -_: _ I I 1 6. ONLY THE INVESTIGATION LOCATIONS ALONG THE 1971 BASIN SOUTHERN DIKE AND DIKE TOE ARE SHOWN.
�— —
x } 7. THE ESTIMATED VERTICAL BOUNDARIES OF CCR PRESENTED HEREIN ARE BASED ON THE FINDINGS FROM FIELD INVESTIGATIONS AND/OR
%TlllTlfjff�lllT/lT I x APPROXIMATE LOCATION
II LABORATORY TESTING-
OF LAY OF LAND AREA (COLA) i
x- 8, THE HAND AUGER BORINGS WERE LOCATED WITH A HAND-HELD GPS AND ARE SHOWN AT APPROXIMATE LOCATIONS.
~ ..
- - - - --- I
THE
Y -- �� �\ \ Ir 9
COMPLETDEDELINEATION OF BORINGS
CVERTICAL TERMINATED
1EXTENDAT TS ATTHOSEHAND AUGER LOCATIONS
SHALLOW DEPTHS SUCH THAT 10
ADDITIONAL INFORMATION IS REQUIRED TO
10. SG -31S LOCATEDAT 202,057 ON. 2,303,905.0E AND NOT SHOWN IN THIS FIGURE.
11. WETLAND DELINEATION SHOWN WAS RECEIVED FROM AMEC FOSTER WHEELER ON DECEMBER 7, 2016. WETLAND IMPACTS FROM
CLOSURE -RELATED ACTIVITIES TO BE PERFORMED ALONG THE DISCHARGE CANAL AND COOLING POND WERE ESTIMATED APPROXIMATELY
n — .�►-- — a � �7/ / N x x I 0.6 AND 0.2 ACRES, RESPECTIVELY.
— — — — —'9A i " I I HISTORICAL
— — — — — — — -'QiL F- — x I } 0 400' INVESTIGATION LOCATIONS
_ _ _ _ _ x—x
x Z r J x SG -4
— — — — — — — — — I r ' I x— x X _ SCALE IN FEET Geos teC `
— — — — — — — — I r FIGURE
3 = — — — —— — `� x — consultants
— — — — — — — ——� !. FOR REVIEW ONLY
2