DRC-2013-002348 - 0901a0688038671d

i
Energy Fuels Resources (USA) Inc.
225 Union Blvd. Suite 600
Lakewood, CO, US, 80228
303 974 2140
www.energyfuels.com
VIA EMAIL AND OVERNIGHT DELIVERY
Mr. Rusty Lundberg
Director of the Utah Division of Radiation Control
May 20, 2013
M DRC-2013-0023
State of Utah Department of Environmental Quality \^1£2J^^
195 North 1950 West
P.O. Box 144850
Salt Lake City, UT 84116-4850
Re: White Mesa Uranium Mill - Response to Division of Radiation Control ("DRC") comments on
Abandonment Plan for Selected TWN-Series Wells
Dear Mr. Lundberg:
This letter transmits the revised Abandonment Plan for Selected TWN-Series Wells in response to the
Division of Radiation Control ("DRC") comments provided by Mr. Dean Henderson to Energy Fuels
Resources (USA) Inc. ("EFRI") by telephone on May 15, 2013.
EFRI has made the requested modifications which are reflected in the attached revised document.
If you have any questions, please contact me at [phone].
Yours very truly,
Phil Goble, Utah DRC
Dean Henderson, Utah DRC
Dan Hillsten
Harold R. Roberts
David E. Turk
Kathy Weinel
ENERGY FUELS RESOURCES (USA) INC.
Jo Ann Tischler
Manager, Compliance and Licensing
cc David C. Frydenlund
Attachments
N:\WMM\Nitrate Investigation and CIR\Corrective Action Plan (CAP)\Well Abandonment Procedure\05.20.13 trans Itr for
revision.doc
HYDRO GEO CHEM, INC.
Environmental Science &" Technology
May 20,2013
Jo Ann Tischler
Director, Compliance and Permitting
Energy Fuels Resources (USA) Inc
225 Union Blvd., Suite 600
Lakewood, Colorado 80228
Re: Abandonment of Selected TWN-series Wells, White Mesa Uranium Mill Near
Blanding, Utah
Dear Ms. Tischler,
This letter provides a plan to abandon temporary perched nitrate monitoring wells TWN-5, TWN-8,
TWN-9, TWN-10, TWN-11, TWN-12, TWN-13, TWN-15, and TWN-17. This work constitutes a
portion of Phase II of the May 7,2012 Correction Action Plan for Nitrate, White Mesa Uranium Mill
Near Blanding, Utah (the CAP). As discussed below, the abandonment must be performed by a State
of Utah licensed driller in accordance with applicable regulations (State of Utah Administrative
Rules for Water Wells R655-4-14).
Background
The White Mesa site contains a total of 97 perched monitoring wells, temporary perched monitoring
wells, and piezometers (Figure 1) that are screened in a relatively shallow perched water zone hosted
primarily by the Burro Canyon Formation. Where saturated thicknesses are greater, the perched
water rises into the overlying Dakota Sandstone. The perched water is supported by the Brushy Basin
Member of the Morrison Formation, a bentonitic shale (considered impermeable) that underlies the
Burro Canyon Formation.
The 19 TWN-series temporary wells are located north-northeast (upgradient) of the tailings cells at
the site and were installed primarily to monitor hydraulic conditions and nitrate concentrations in the
northeast portion of the site. Many of these wells help to define a perched zone nitrate plume that
extends from a location northeast (upgradient) of the tailings cells to the northeast portion of the
tailings cell complex.
C
51 Wesr Wermore, Suite 101 Tucson, Arizona 85705-1678 I 'I 520 293 1500 520.293.1550-Fax [phone]-Toll Free
Jo Ann Tischler
May 20, 2013
Page 2
Based on criteria provided in the CAP, some of the TWN-series wells will be retained for water level
and groundwater quality monitoring, and some for water level monitoring only. Wells TWN-5,
TWN-8, TWN-9, TWN-10, TWN-11, TWN-12, TWN-13, TWN-15, andTWN-17 (Figure 1) are not
needed for either purpose and are to be abandoned in accordance with applicable regulations (State
of Utah Administrative Rules for Water Wells R655-4-14).
Well Construction
Table 1 provides well construction details for all TWN-series wells to be abandoned and Table 2
provides surveyed well locations and elevations. Appendix A contains the well construction
diagrams. Each well to be abandoned is constructed within a nominal 6 3A - inch diameter borehole
using 4-inch diameter flush-thread schedule 40 PVC casing and 0.02-slot factory slotted PVC screen.
The annular space within each screened interval contains a Colorado silica sand filter pack overlain
by a bentonite seal of approximately 3 to 5 foot thickness. The annular space above the seal is
grouted to the surface. Note that the screened interval of TWN-17 extends into the bore seal of the
well.
Depths of wells range from approximately 102.5 to 155 feet below land surface (bis) and each boring
extends a few feet into the underlying Brushy Basin Member of the Morrison Formation. As noted
above, the Brushy Basin is bentonitic and considered impermeable. The variability in well depth is
primarily due to the irregular elevation of the Burro Canyon/Brushy Basin contact in this portion of
the site.
The screened intervals of the wells range in length from 50 to 80 feet, and the filter pack lengths
from approximately 55.5 to 87.5 feet. The variability in screened length is related to the variable
saturated thickness of the perched zone in this portion of the site.
Well Abandonment
Because the well casings are constructed of PVC and are grouted in place, pulling of casings prior to
abandonment is not feasible. Wells will be abandoned in accordance with State of Utah
Administrative Code R655-4 subsection 14.9 Abandonment of Gravel Packed Wells by a "currently
licensed water well driller who shall be responsible for verification of the procedures and materials
used".
After removing any equipment present and sounding to ensure that no obstructions exist that might
interfere with filling and sealing, each abandoned well will be "pressure grouted throughout the
perforated or screened section of the well. The remainder of the well will be filled with sand cement
grout, neat cement grout, bentonite abandonment products, or bentonite grout. The uppermost ten
(10) feet of the abandoned well casing shall consist of neat cement grout or sand cement grout." The
casing of each abandoned well "shall be severed a minimum of two feet below the natural ground
surface adjacent to the well or at the collar of the hole, whichever is the lower elevation. A minimum
of two (2) feet of compacted native material shall be placed above the abandoned well upon
completion".
H \718000\mtrate201 l\CAP\Wen_Abandonment\TWN_Abandonment_rev_ 13-0520 doc
Jo Ann Tischler
May 20, 2013
Page 3
With regard to placement of materials within the well, "neat cement grout shall be introduced at the
bottom of the well" and "placed progressively upward to the top of the well. The sealing material
shall be placed by the use of a grout pipe, tremie line, dump bailer, or equivalent in order to avoid
freefall, bridging, or dilution of sealing materials or separation of aggregates from sealants".
With regard to any bentonite-based abandonment products that may be used, "bentonite-based
abandonment products shall be mixed and placed according to manufacturer's specifications and
result in a seal free of voids or bridges. Granular or powdered bentonite shall not be placed under
water. When placing unhydrated bentonite, a sounding or tamping tool shall be run in the sealing
interval during pouring to measure fill-up rate, verify a continuous seal placement, and to break up
possible bridges or cake formations".
Reporting
A well abandonment report for each abandoned well will be prepared by the licensed driller
performing the abandonment.
As specified in State of Utah Administrative Code R655-4, "within 30 days of the completion of
abandonment work on any well, the driller shall file an abandonment log with the state engineer. The
blank abandonment log will be mailed to the licensed well driller upon notice to the state engineer of
commencement of abandonment work as described in Subsection R655-4-4(4.2.4)".
As per R655-4, "the water right number or non-production well number, owner name/address, and the
well location (if available) will be preprinted on the blank abandonment log provided to the well driller.
The driller is required to verify this information and make any necessary changes on the abandonment
log prior to submitting the log. The driller must provide the following information on the abandonment
log:
a. Existing well construction information;
b. Date of abandonment;
c. Reason for abandonment;
d. A description of the abandonment method;
e. A description of the abandonment materials including depth intervals, material type,
quantity, and mix ratio;
f. Replacement well information (if applicable);
g. The well driller's statement to include the driller name, license number, signature, and
date."
H \718000\mirate201 l\CAP\Wen_Abandonment\TWN_Abandonment_rev_ 13-0520 doc
j
Jo Ann Tischler
May 20, 2013
Page 4
In addition, EFRI will provide a Well Abandonment Report to the Executive Secretary pursuant
to the requirements of Section 7.2.1 of the CAP.
Please feel free to contact me if you have any questions.
Stewart J. Smith
Vice President
Attachments: Tables (2)
Figure 1
Appendix A
Sincerely,
H \718000\nUrate2011\CAP^WeIl_Abandonnient\TWN_Abandonment_rev_ 13-0520 doc
ATTACHMENTS
TABLES
1 Well Construction Details
2 Well Survey Data
FIGURE
1 White Mesa Site Plan Showing Locations of Perched Wells and Piezometers
APPENDIX A
A Well Construction Diagrams
TABLES
o
O CM
o _ ff §»i2
~ 2 £
oo in in Is-' in
in
in in
m Is-' oo oo o oo in Is-Is-
</> J £
fill
® ts e
lis
CSC
0)
o o r^ o in o in o oo o oo o o Is-o
oo
in in
Is-Is-
o in
o oo
o in
in
oj Is-
in
iri
•
in iri Is-
m c\i o
in
in
o •
in
in •
o
CO
in
oo
o
CM
o
in m
o oo co co
Is-in o
in in
OJ
OJ
co
o
00
CO
CO
xr
in
OJ
oo
o
CM
75 *
*? CL
m in o in
in c\i o
in r-.' o
m m o
CM
in in
in oo • z
CM CO in •
Z
CD O
•g
CO
•o
C .JO
0)
CD
II
CD -Q I*
SP
CD CO -C CD O
•c .£
•8 a
.52 .co
^ Jo
il
is
CD CD •? N
12
.CD _0
"O CO
O) C .C Cp
CO $
O CO
SP CD
o
CO
co .c £ co
o ® 8 ?
.jo a>
JO .§
| CD
£ -8
ir- C
CD >C
o CO CQ .
o
Q
CD
E c o
"O c (0 A <
0_ <
O
o o o
CO
>
CD
Lu
TJ C 3 2 o
co in co m
in co
Oi Tf CO
in
co co
iri
co
in
co co
Tf co co in
co
co co co in
co o i< co co m
Tf
o co co
CO
in
m Is-co in
co Is-oi co
CO
m
o
CM O CVJ
>
CD
UJ
c
"35
s
a. o
CO
3
O) c o
CO
T— iri in
CO
in
co
Tf
in CD in
in
Tf
Tf
CD
in
co Oi
cd co
CD
in
co in
Tf co CD m
Tf
CM
CO CO CO
m
CM CO
Tf
CO CD
in
o
Tf
CO
Is-
CD in
m in
Tf CO m
(0
CO
UJ © "O
CB
0) CO Ul
c
t o
CM
Tf
CO
Tf
l<
b
8* Oi O
Tf
CM
Tf
CD
l<
CM
CM P
Is-
CO
CO
CO
CM
Tf
00 CO
CM CM
Oi CM
Tf
CO O Is-CO
CD
n E
CO o Tf CM' o b P o> o
oo co in co
CM
CM P
Is-co
in oo co
Is-'
in o o CM CM CM
in
CO
CO o Is-
CO
Tf
CO o
CD
CO
Tf
CD
Oi
o
Is-
Tf
CO 00
Tf
CO
CM P
Is-
00
Oi CM
cvi in
CM CM CM
00
oo Is-
CD
Is-
00
Tf
o
iri
in o>
CD
o
o
Tf Tf
CO
00
CO
CM 8°
Is-
00
CM CO
T—
CD* CM CD
o
CM CM CM
CO
o iri in
oo
CD
Oi
Tf
bi &
CD
o
Oi in
T-o
CO
o
CO 8^
Is-co
CO o oo d
CM CO
CM CM
CM
CO 00
iri Is-
Oi o Is-
00
in
1—
Tf
oi
CM
Oi 8N
Oi
o
in
00 CO
CO
o
CO p
Is-
CO
m
CM Oi
CM
CD
CM
CM
CM
CM
CO Oi
CM
o
Is-
o
o o in
CM
CO CO
bi
Oi
o
m
CO
Tf
T—
CO
CO
CM p
Is-
00
CM CO
d
in
CM CM CM CM
Oi
CD CO
Is-
CD
o
Oi CO
1—
CM
m
bi
Oi
o
Oi CO CM CM
<J>
Tf
CM p
Is-
CO
Tf
CO o
Tf
CO 00
o
CM CM
CM
CM
d
CO CM Oi
CD
CO
oo
CM
CO
CD 8*
CD o
CM CM
o
oi
Tf
CM 8* Is-
00
Tf o Tf
00
00 CO CM CM CM
CM
00
ri
CM CD CO
m
I
Z
I—
00
I
z
CD
I
z
o
I
z
CM 00 m
I—
I
a
f
CO
CO
•c
3
CO
I
CO
I
CO
I
s I
I
CO c TO
£
8
CO
I
I
CO
CO
•S! o
CO
CO
Q >»
CO
3
CO © E c o T3 c 08
!,
CO %
Q.
<
o
FIGURE
TWN-11 TWN-12
TWN-18
TWN-16
TWH-15 TWM-17
TWN-14
MW-01
TWN-05
TVWMJ7
TWN-10
MW-18 TWM6
TWN-09
PIEZ-01
TW&18
TWN-03
•„TW»MJ2
• • 1 ,L1
P1EZ-02
MW«2 MW-24 MW-28
. " TW4-210 1WM1 PIJEW»
TW4-i$ TW4-18
TW4-240 O 0^ TWM5
MW-29
DR-OS DIVOS DR-07
MW23 - «
Q MW-1*
!l
Mw^as j;
MW-30
•I SWW3JM-12
^W4-16^W4.11 [
MWK31
'•04
'4-13
MW«33
6
MW-34„J^ _
AM 5
"WW-O&^T-M
A. in •
MW-32 ™*01
TW4-04O TW4-14
TW4-06
0 TW4-27
O TW4-26 *
• TW4-23 O
P1EZ-04
MW-14
DR48 OR-10 DR-11 DR-12 DM3
DR-09 MW-17
PiEZ-OS
MW-03
MW-21
DR-14 DR-1S
DR-19
DR-17
DR-20
MW*0
DR-21
DR-23 I MW-22
DR-22
DR-24
TWN-5 o
MW-5
TW4-12
o
TWN-1
•
PIEZ-1
TW4-27
EXPLANATION
temporary perched nitrate monitoring well
to be abandoned as per the CAP
perched monitoring well
temporary perched monitoring well
temporary perched nitrate monitoring well
perched piezometer
temporary perched monitoring well
installed October, 2011
seep or spnng
1 mile
TWN-13
HYDRO
GEO
CHEM, INC.
WHITE MESA SITE PLAN SHOWING LOCATIONS
OF PERCHED WELLS AND PIEZOMETERS AND
PERCHED NITRATE WELLS TO BE ABANDONED
APPROVED
SJS
DATE
1/17/2013
REFERENCE H:/718000/nitrate2011/
CAP/Well Abandonent/UTMwelloc.srf 1
APPENDIX A
WELL CONSTRUCTION DIAGRAMS
TOP OF CASING ELEVATION
= 5655.18 FT AMSL
I
4 INCH DIA. PVC CAP
GROUND SURFACE ELEVATION
» 5653 70 FT AMSL
CL Ul O
10
20
30
40
50
60
70
80
90
100
110
120
130
140
150
v DAKCTAXFM'V;
27-6"
- 70-0"
71-2"
77'-0"
80-0"
14I-JT
BRUSHY BASIN
155-0"
"IU 'nr in "in ' ui :4ir;m-'in^n in • "^[NOMINAL 12 3/4 INCH DIA.||||
"BOREHOLE
IQ'-O"
SURFACE CASING (8 INCH DIA PVC)
PORTLAND CEMENT GROUT
BENTONITE SEAL
•4 INCH DIA SCH 40 FLUSH
THREAD PVC CASING
-NOMINAL 6 3/4 INCH DIA. BOREHOLE
COLORADO SILICA GRAVEL PACK
4 INCH DIA SCH 40 FLUSH-THREAD
0 02 SLOT PVC SCREEN
J5C-Q"
DEPTH DRILLED
NOT TO SCALE
HYDRO
GEO
CHEM, INC.
TWN-5
AS-BUILT WELL CONSTRUCTION SCHEMATIC
Approved
SS
Date
03/04/10
Aumor
AMC 03/04/10
Flto Namo
7180226A
FlQUIO
A1
TOP OF CASING ELEVATION » 5651.48 FT AMSL
GROUND SURFACE ELEVATION
a 5649.35 FT AMSL J
4 INCH DIA. PVC CAP
,y=?fr NOMINAL 12 3/4 INCH DIA!i|| ^>Xv>eOREHOLE
SURFACE CASING (8 INCH DIA PVC)
PORTLAND CEMENT GROUT
4 INCH DIA SCH 40 FLUSH
THREAD PVC CASING
BlBft
DAKOTA FM 5'-0" 10-0" 10
20
30
40
50
60 62-0" ^PM-IpWATER JZ.
66-9"
BENTON TE SEAL 70 72'-6"
60
90
100
10
120
130
140 1421-6.
BRUSHY BASIN 145-6"
150-0" DEPTH DRILLED 150
NOMINAL 6 3/4 INCH DIA BOREHOLE
COLORADO SILICA GRAVEL PACK
4 INCH DIA SCH 40 FLUSH-THREAD
0.02 SLOT PVC SCREEN
NOT TO SCALE
-•HYDRO '
^ GEO
CHEM, INC.
TWN-8
AS-BUILT WELL CONSTRUCTION SCHEMATIC
Approved
SS
Pnto
03/04/10
Author
AMC
Balo
03/04/10
Fito Namo
7180229A A2
TOP OF CASING ELEVATION - 5647.45 FT AMSL •4 INCH DIA PVC CAP
GROUND SURFACE ELEVATION « 5645 68 FT AMSL
' j rrrirumii i
10
20
30
40
50
60
70
80 -
90
100
65'-0"
DAKOTA FM 5-0"
40'-10"
44-10"
47-0"
^ J
94^01
BRUSHY BASIN
102-6"
ir'jinir'iii-iir-'in- itr-iir 'iir nr III:
^jf1^ NOMINAL 12 3/4 INCH DIA ;'f| ^^feeOREHOLE
1Q'-0"
SURFACE CASING (8 INCH DIA PVC)
4 INCH DIA SCH 40 FLUSH
THREAD PVC CASING
•PORTLAND CEMENT GROUT
BENTONITE SEAL
DEPTH TO WATER _ _
|*TOMIrTATTT^/g 1NCH D|A
BOREHOLE
COLORADO SILICA GRAVEL PACK
4 INCH DIA SCH 40 FLUSH-THREAD
0 02 SLOT PVC SCREEN
,97VQ,:
DEPTH DRILLED
NOT TO SCALE
HYDRO
GEO
CHEM, INC.
TWN.9
AS-BUILT WELL CONSTRUCTION SCHEMATIC
Approved
SS
BaTS
03/04/10
AulW
AMC
Dato
03/04/10
FUo Namo
7180230A
Flouro
A3
TOP OF CASING ELEVATION
- 5666.98 FT AMSL
o
I •4 INCH DIA PVC CAP
GROUND SURFACE ELEVATION
5664.63 FT AMSL J
OL LJ Q
10
20
30
40
50
60
70
100
110
^DAKOYAW^
30-0"
49-6"
52-0"
55-0"
80 - 82-0"
90
102l-_6" K
BRUSHY BASIN
107-6"
^Hl'li;1]NOMINAL 12 3/4 INCH DIA/lf nrnjn BOREHOLE * ""
10'-0H
SURFACE CASING (8 INCH DIA PVC)
PORTLAND CEMENT GROUT
•4 INCH DIA SCH 40 FLUSH
THREAD PVC CASING
BENTONITE SEAL
•NOMINAL 6 3/4 INCH DIA. BOREHOLE
COLORADO SILICA GRAVEL PACK
DEPTH TO WATER
4 INCH DIA SCH 40 FLUSH-THREAD
0.02 SLOT PVC SCREEN
1Q5'-0"
DEPTH DRILLED
NOT TO SCALE
HYDRO
GEO
CHEM, INC.
TWN-10
AS-BUILT WELL CONSTRUCTION SCHEMATIC
Approved
SS
Bato
03/04/10
Author
AMC
Bate
03/04/10
Fllo Nnow
7180231A
figure
A4
TOP OF CASING ELEVATION « 5684 53 FT AMSL •4 INCH DIA PVC CAP
GROUND SURFACE ELEVATION
« 5683.16 FT AMSL
10
20
30
40
50
I 60
70
80
90
100
110
120
130
140
150
~ 72'-0"
DAKOTA FM 2l'-0"
55'-Q"
60'-0"
62'-0"
uoi-o:'
BRUSHY BASIN
147'-6"
Ir
Mw^ffi1 NOMINAL 12 3/4 INCH DIAU|| ^,,'"1,t" BOREHOLE1 ( "'
10-0"
SURFACE CASING (8 INCH DIA PVC)
•PORTLAND CEMENT GROUT
•4 INCH DIA SCH 40 FLUSH THREAD PVC CASING
• BENTONITE SEAL
-NOMINAL 6 3/4 INCH DIA. BOREHOLE
DE£IH TO^WATER,, „ . .
• COLORADO SILICA GRAVEL PACK
4 INCH DIA SCH 40 FLUSH-THREAD
0.02 SLOT PVC SCREEN
,142'-Q"
DEPTH DRILLED
NOT TO SCALE
HYDRO
GEO
CHEM, INC.
TWN.11
AS-BUILT WELL CONSTRUCTION SCHEMATIC
Approvod
SS
Dato
03/04/10
Author
AMC Date
03/04/10
File Name
7180232A
Ftouro
A5
TOP OF CASING ELEVATION
« 5668.24 FT AMSL
GROUND SURFACE ELEVATION
= 5667 03 FT AMSL
10
4 INCH DIA PVC CAP
If
CL LU Q
20
30
40
50
60
70
80
90
100
110
_ 4Q'-Q
DAKOTA FM 5'-0" 10*
23-0
3 2 28-0" 2
30-0"
v
110-Q"
m DEPTH DRILLED 115-0
NOMINAL 12 3/4 INCH DIA. *SMryE!QREHOLE ' (
SURFACE CASING (8 INCH DIA PVC)
PORTLAND CEMENT GROUT
4 INCH DIA SCH 40 FLUSH
THREAD PVC CASING
BENTONITE SEAL
PJfiTj±J^Wj£EB_
NOMINAL 6 3/4 INCH DIA BOREHOLE
COLORADO SILICA GRAVEL PACK
4 INCH DIA SCH 40 FLUSH-THREAD 0.02 SLOT PVC SCREEN
ior-_6"
L BRUSHY BASIN
NOT TO SCALE
HYDRO
GEO
CHEM, INC.
TWN-12
AS-BUILT WELL CONSTRUCTION SCHEMATIC
Approved
SS
Data
03/04/10
Author
AMC Pate
03/04/10
Fllo Name
7180233A
Figure
A6
TOP OF CASING ELEVATION
= 5634.32 FT AMSL
T •4 INCH DIA. PVC CAP
GROUND SURFACE ELEVATION
= 5633 04 FT AMSL J
fc
10 -
20
30
40
50
60
70
80
90
100
110
120
f^!ilfelllVl1^in"Jl\F^I - JSL^NOM^AL 12 3/4 INCH DIA| ||
^v>^y^?7^ • *•> vx9x^7P0REHOLE
DEPTH TO WATER
DAKOTA FM 5-0" 10-0"
33-0
40-0
46-0 ±2-0
SURFACE CASING (8 INCH DIA PVC)
PORTLAND CEMENT GROUT
4 INCH DIA SCH 40 FLUSH
THREAD PVC CASING
BENTONITE SEAL
NOMINAL 6 3/4 INCH DIA BOREHOLE
COLORADO SILICA GRAVEL PACK
4 INCH DIA SCH 40 FLUSH-THREAD
0.02 SLOT PVC SCREEN
1151-0
BRUSHY BASIN
120-0" DEPTH DRILLED
NOT TO SCALE
HYDRO
GEO
CHEM, ING
TWN-13
AS-BUILT WELL CONSTRUCTION SCHEMATIC
Approved
SS
Dala
03/04/10
Auilior
AMC
Dala
03/04/10
Rio Name
7180234A
Figure
A7
TOP OF CASING ELEVATION
= 5676 49 FT AMSL
GROUND SURFACE ELEVATION
= 5675.01 FT AMSL ^
'iliiSI'
10 -
20 -
0.
30 "
40
50
60
70
80
90
100
110
120
130
140
150
160
10-0
V/WXWsY /WAV, DAKOTA FM
38-0"
76-0
80-0
82-0"
DEPTH TO WATER
1 iV
DEPTH DRILLED BS
4 INCH DIA PVC CAP
-Jjiinir^itiiii'"iiL-in- iiu'iir'tn iip
ili [Ii NOMINAL 12 3/4 INCH DIA. If ^"-'""BOREHOLE (
SURFACE CASING (8 INCH DIA PVC)
PORTLAND CEMENT GROUT
4 INCH DIA SCH 40 FLUSH
THREAD PVC CASING
BENTONITE SEAL
NOMINAL 6 3/4 INCH DIA BOREHOLE
4 INCH DIA SCH 40 FLUSH-THREAD
0.02 SLOT PVC SCREEN
COLORADO SILICA GRAVEL PACK
15P>_P_"
BRUSHY BASJN, Q»
NOT TO SCALE
HYDRO
GEO
CHEM, INC.
TWN-15
AS-BUILT WELL CONSTRUCTION SCHEMATIC
Approved
SS
Date
03/04/10
AuUior
AMC
Halo
03/04/10
FUe Name
7180236A
figure
A8
TOP OF CASING ELEVATION
- 5641.55 FT AMSL
GROUND SURFACE ELEVATION
^ 5639 73 FT AMSL
10
20
30
40
te
50 -
Q. LU Q
60
70
80
90
100
110
;(iu;rwi«T»
VAVXVXVX// DAKOTA FM 5'-0"
24'-0"
27-0"
35'-0" . J**Z°" v
I
1Q4>_0"
BRUSHY BASIN
110*~0M
4 INCH DIA. PVC CAP
% JDJEPJH- JO WATER
I^Af* NOMINAL 12 3/4 INCH DIA.'ll
•7AV.NV>P0REHOLE
1Q-Q"
SURFACE CASING (8 INCH DIA PVC)
PORTLAND CEMENT GROUT
4 INCH DIA SCH 40 FLUSH
THREAD PVC CASING
BENTONITE SEAL
-NOMINAL 6 3/4 INCH DIA. BOREHOLE
COLORADO SILICA GRAVEL PACK
4 INCH DIA SCH 40 FLUSH-THREAD
0 02 SLOT PVC SCREEN
104-0"
DEPTH DRILLED
NOT TO SCALE
Mi HYDRO
GEO
CHEM, INC.
TWN-17
AS-BUILT WELL CONSTRUCTION SCHEMATIC
Approved
SS
Date
03/04/10
Author
AMC [Dala
03/04/10
Fllo Noma
7180238A
Figure
A9