2015-03-24_REVISION - M2008080 ‎(15)‎

• Permit No: M2008080
• IBM Index Class Name: Revision
• Doc Date: 3/24/2015
• Doc Name: Exhibit F Reclamation Plan TR01
• From: J&T Consulting, Inc.
• To: DRMS
• Type & Sequence: TR1
• Email Name: PSH
• Email Name: TAK
• Media Type: M
• Archive: No

LEGEND:
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—4597' 5� // // � / I BOUNDARY * OVERBURDEN AND TOPSOIL ® GAS VALVE o z V� a O LL 3
/ / / DISTANCE VARIES 12.5 U) —
\ EXISTING BACKFILL ALL DISTURBED AREAS 5 Q c
/ DOWN TO WATER SURFACE y M °
/ \ SOUTH BRANCH" / / GROUND WELL
OF PLUMB DITCH VARIES V c c
\ / j// / TV \ ® WATER METER v
'17 / `/ �1 // / �r !j 1 / 06
/y ... ... = 4591 WATER FAUCET 0� o S� m
WALL WATER LINE MARKER a
SLURRY
A ELECTRIC TRANSFORMER
SAND AND GRAVEL: ��Y\�\�
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PROPERTY LINE
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111 EXISTING DUKE GAS
TYPICAL BACKFILL SECTION G G p
(� N.T.S.
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1 + ,,�• , � �-., ,� �I M' N'— UNDERGROUND WATER LINE � O
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EXISTING CONTOURS (2' INTERVALS) O
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GRAVEL ROAD p
IMF-TER DRAIN I _ W CV a3
LOCATION PROPOSED PERMIT BOUNDARY U
REQUIRED) BACKFILL EXISTING
- I TRENCH WITH NATIVE -- PROPOSED SLURRY WALL CC
MATERIALS
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PROPOSED CONTOURS
r 4640
't• �I . . . PERIMETER DRAIN
1 In ��\ li �' �,'.
1.5' TYP. SANDY CLAY
—� OVERBURDEN
VARIES . ASTM C33-7
ONC
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V '
.' t\\\"I",\\\ \\\ 1 5 o I a e e (MIN) J
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ASTM C33
CONCRETE SAND e. a 25' DITCHco
(IF REQUIRED). VARIES .. a OFFSET �I = O
4.0' S`OpE ■
J.
a e a SAND AND GRAVEL pC�ON Lam.
\ F '{ ALLUVIUM 3:1 RAC BOTTOM OF DITCH 0 � O
as 05' BANK SLOPE `
a.og g4 . (TYP.) C SOUTH BRANCH PLUMB DITCH
TYP. (TYP.) V
C'L OFFSET DETAIL C
C
N.T.S. iw
16
1 tiv v o s� INLET/OUTLET 4
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\�\\ 1 FACILITY PERIMETER DRAIN DETAIL (TYPICAL SECTION IF REQUIRED)
N.T.S.
SLURRY WALL NOTES:
1\ 1. Bentonite Specifications 6. Soil—oil Backfill Specifications
YP/PV ratio API Std. 13A less than 3 S—B backfill slump ASTM C 143 1 set per 100 cu. yds.
Viscometer greater than 30
v
Filtrate Loss lss than 15 cm3 Slump 2-6 inches g
' '' Moisture Content ASTM D 2216 less than 10 percent °
S—B backfilf gradation 1 set per 300 cu. yds. y
d
Test results for each lot of bentonite must be provided. o
a I Screen (US Standard) Percent by Dry Weight
3 inch 2. Water Soecifications 100 Z
PH 6-8 # 4 40-80 0
CR I Hardness less than 200 ppm #40 25-60
58' Total Dissolved Solids
' less than 500ppm #200 20-40 W
Oil, organics, acids, alkali less than 50 ppm each
PERMIT Chloride report Minimum Plasticity Index of 10 H
t }
BOUNDARY 3. Bentonite Slurry General Specifications 7. ltev Trench and Slurry Wall Cap Specifications v
The initial bentonite slurry must be tested prior to placement in During excavation, soundings should be obtained to determine the
the trench. The slurry may be mixed in high shear mixers or elevations of the top of the key layer, the bottom of the CO a-
EXISTING 25' mixed and hydrated in slur hydration GROUND Y slurry Y ponds. In general, a excavation, and the bottom of the trench prior to backfilling. If
OVERBURDEN AND TOPSOIL minimum hydration time of 8 hours will allow the bentonite slurry sediments in excess of 2 inches have accumulated it is necessary f'3•� 33' BACKFILL ALL DISTURBED AREAS to meet all criteria. A minimum bentonite content of 6 percent in to clean the trench bottom by airlift pumps or excavation m of
StopF DOWN TO WATER SURFACE 3' the slurry by weight is required. equipment to remove the sand and sediment that has settled. The
4 shift. Soundings should um, at the beginning
_. s i o un i g sou be obtained approximately every
Viscosity Marsh Funnel (API RP 13B— ) less 20 feet. PP Y rY
4594' bottom sou e cleaned, as a minim
entonite Slurry Testing Specifications before Placement of each 'n s a r el a z°
SLURRY WALL rat Loss than of the II will b layer
e L
an 40 sec
Density less than 64 pcf Adequate keying in the S B backfill to an impermeable at
•. . 0 cm3
less the b
p 6.5 to 10
s an base wall wi a required and specified in the final
H design report for the slurry wall The design documents will include
a description of the key in layer and describe how trench cuttings
i\/ The tests listed above should be run 1 or 2 times or other observations will be used to assure that the slurry wall ^✓
per shift and SAND AND GRAVEL : ' Yiyc\\/\ at least once per batch of slurry. The slurry must be further will be adequately keyed. Temporary slurry wall protection will be ^ D�
tested after placement in the trench. The tests conducted are for required in the form of a noncompacted soil cover placed withinG7
\ viscosity, density, sand content, and pH. Two sets of tests per one day over each backfilled 100 foot reach. The temporary cover
shift at two locations in the trench (approximately 2 feet below is removed after settlement (approximate) 2 weeks and replaced
with a compacted cted clay cover over the completed I II
s u slurry wall.
m a la
the slurry surface and 2 feet above the bottom of the trench) r
\ \ are required If the density of the slurry in the trench exceeds 85 Job# _ _ 07113
pcf the excess solids must be removed by desanding or the slurry 8. Post Construction Testing
Zreplaced with fresh slurry. The slurry level must be maintained at Post construction testing will be conducted in accordance with the Date _ _9/--
200 100 0 200 400 600 / �j — 4'/ ' �DROCKfj" • �j Xj/' feast 3 feet above the ground water elevation and no more than Colorado State Engineer's Office." Drawne� _ WSS
2 feet below the platform.
p of
the working
Z/ / .' /X/' / ��/ " " / P Deal gned By— TPY
�/ /f' 9. Above specifications (notes 1-8) are provided as a general Checked By JCY
SCALE IN FEET 5, Bentonite Slurry Testing Specifications after Placement guideline for permitting purposes. Final specifications and design Fite JT-Reclamation
/�� /� Unit Weight 1.03 to 1.40 gm/cm3 criteria will be developed during the final design of the slurry wall. scale 1"=200'
Lo\ T�/!• PICAL BACKFILL. SECTION Sand Content ASTM D 4381-84(1993)e10 to 20 percent by Sheet: of:
N.T.S. volume
1 ,