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TRANSCRIPT
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Grants Reclamation Project 1st Quarter 2016 San Andres Well Integrity Testing
AdamArgu o Hydro-Engineering, LLC
For:
Homestake Mining Company P. 0. Box 98
Grants, New Mexico 87020
By:
Hydro-Engineering, L.L.C . . March2016
TABLE OF CONTENTS Page Number
Executive Summary ....................................................................................... ES-1 1. 0 Introduction...................................................................................................................... 1-1
2.0 San Andres Well Integrity ............................................................................................... 2-1
2.1 Well 951R ....................................................................................................... 2-1 2.1.1 951R Lithology and Well Completion ....................................................... 2-1 2.1.2 95 lR Geophysical Logs .............................................................................. 2-2 2.1.3 951R Video ................................................................................................. 2-2 2.1.4 Summary of'Well 951R Integrity Testing ................................................... 2-2
2.2 Well 943 .......................................................................................................... 2-3 2.2.1 943 Lithology and Well Completion .......................................................... 2-3 2.2.2 943 Geophysical Logs ................................................................................ 2-3 2.2.3 943 Video .................................................................................................... 2-4 2.2.4 Summary of Well 943 Integrity Testing .................................................... 2-5
3.0 San Andres Ground-Water Quality ................................................................................. 3-1
3.1 Sulfate Concentrations ........................................................................................ 3-1 3.2 TDS Concentrations ............................................................................................ 3-1 3 .3 Chloride Concentrations ..................................................................................... 3-1 3.4 Uranium Concentrations ..................................................................................... 3-2 3.5 Selenium Concentrations .................................................................................... 3-2
4.0 Conclusion ....................................................................................................................... 4-1
5. 0 References ........................................................................................................................ 5-1
Grants Reclamation Project 1st Quarter 2016 San Andres Integrity Testing
TABLE OF CONTENTS (continued)
Figures (Located at the end of each section) ·
1-1. Location of San Andres Wells and Water Quality Data for the San Andres Aquifer 2015, mg/I
2-1. Well 95 lR Completion Details and Lithology 2-2. Well 951R Geophysical Logs 2-3. Well 943 Completion Details and Lithology 2-4. Well 943 Geophysical Logs
3-1. Sulfate Concentrations for San Andres Wells 943, 951, 951R, #1 Deep Well, and #2 Deep Well
3-2. Sulfate Concentrations for San Andres Wells 532, 806R, 938, and 999 3-3. TDS Concentrations for San Andres Wells 943, 951, 951R, #1 Deep Well, and #2 Deep
Well 3-4_ TDS Concentrations for San Andres Wells 532, 806R, 938, and 999 3-5. Chloride Concentrations for San Andres Wells 943, 951, 951R, #1 Deep Well, and #2
Deep Well . 3-6. Chloride Concentrations for San Andres Wells 532, 806R, 938, and 999 3-7. Uranium Concentrations for San Andres Wells 943, 951, 951R, #1 Deep Well, and #2
Deep Well 3-8. Uranium Concentrations for San Andres Wells 532;·806R; 938, and 999 3-9. Selenium Concentrations for San Andres Wells 943, 951, 951R, #1 Deep Well, and #2
Deep Well 3-10. Selenium Concentrations for San Andres Wells 532, 806R, 938, and 999
Appendix
Appendix A Video of Wells 951R and 943
Grants Reclamation Project 11 1 '1 Quarter 2016 San Andres Integrity Testing
Executive Summary
Well integrity testing is being conducted by Homestake Mining Company of California (HMC) on HMC San Andres wells that are located on the Grants Reclamation Project (GRP). The schedule for this testing program was approved by the New Mexico Environment Department (NJ\.1.ED) on July 6, 2015. While other wells will be tested and evaluated at a future date, this particular report presents the results of the well integrity testing of San Andres wells 95 lR and 943. Subsequent reports will be sent to the regulatory agencies as the testing of additional San· Andres wells is completed.
Geophysical logging and a video camera were used to evaluate the two aforementioned wells. The report also presents water quality results from monitoring of the four San Andres wells that are being used to supply fresh water for the ground-water restoration program. ·
• The San Andres well integrity testing for well 951R, which was drilled in 2012, shows. that th~ integrity .of this well is good and the well is suitable for use as a fresh water supply well.
• The testing ofwell 943, which was drilled in 1952, shows considerable corrosion but the video of the well does not show any significant leakage of alluvial water into the w,~11. Therefore, this well is suitable for use as a fresh water supply welt -- ~;:
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• The water quality in existing San Andres supply wells #1, #2, 943 and 951R is unchanged in 2016 and this indicates that well integrity in these wells has not changed. The increase in 2014 and decline in 2015 in uranium concentrations in well 951R is not a function of pumping from this well, because it was continuously pumped over that entire period. The last five uranium concentrations have been steady and low. Therefore, these four San Andres wells can continue to be used as a fresh water supply. Well integrity -testing for wells #1 and #2 is planned for later in 2016. · "'
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Grants Reclamation Project 1 '' Quarter 2016 San Andres Integrity Testing
ES-1
1.0 Introduction
This report presents the results from the integrity testing of Homestake Mining Company of California's (HMC) San Andres wells 951R and 943. These two San Andres wells are located on the Homestake Grants Reclamation Project. HMC's DP-200 required testing in the first quarter of2016 to evaluate the integrity ofHMC's San Andres wells, 951R and 943.
San Andres well 95 lR is currently used for a supply for fresh water and has been since it was drilled in 2012. Well 943 is also used as a supply for fresh water.
Grants Reclamation Project 1 '' Quarter 20 16 San Andres Integrity Testing
Figure 1-1
Location of San Andres Wells and Water Quality Data for San Andres Aquifer 2016, mg/I
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1543500
1541500
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1537500
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t«JTE• DATA FllR WELLS 532, 806R, 938, 951, 998, AND 999 ARE 2015 DAT A
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0 SAN ANDRES 'JELL
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FIGURE 1-1. LOCATION OF SAN ANDRES WELLS AND WATER QUALJn' DATA FOR THE SAN ANDRES AQUIFER 2016, me/I
2.0 San Andres Well Integrity
The integrity of San Andres wells 951R and 943 were evaluated in the first quarter of2016. A video of the wells and geophysical logs were done by Jet West Geophysical Services to assess the integrity of these San Andres wells. Jet West Geophysical Services also provided interpretation of the logs included in the following discussion.
A gamma ray log was used to define the lithology. Gamma curves can be affected by the fill material in a well's annulus, and thus may indicate changes in completion materials. A 3-arm caliper log measures the inside diameter of a well's casing and indicates where scaling or corrosion/erosion may be present.
The sonic-cement bond log (CBL) is composed of four curves: near receiver (3-foot) variable density log (VDL), near first arrival, delta time, and amplitude. The tool consists of a sonic transmitter which emits a 20 kHz sound pulse twice every second, and two receivers which record the degraded sound energy at a distance of 3 and 4 feet. The tool requires fluid in the well to convey the sound energy. The near, or 3-foot, receiver VDL curve is presented in the log, and the last three curves are derived from the VDL curve. Near first arrival is a measure of the initial compressional energy (in micro-seconds of time) from the tool's transmitter to the receiver spaced 3 feet up the tool. Amplitude represents the signal height of the near first arrival and is read qualitatively. High amplitude readings indicate "ringing" steel pipe and lower amplitudes indicate attenuated sound energy or bonded pipe. Delta time is a measurement of "slowness" in micro-seconds per foot (µsec/ft). Slowness is the inverse of velocity (ft/sec). The velocity of sound travelling through steel is approximately 17,500 ft/sec which equates into a slowness of 57 µsec/ft. Slowness is calculated by subtracting the first arrival of the 3-foot receiver from that of the 4-foot receiver.
TheA Pi log is read qualitatively in a reverse fashion from higher to lower counts with the higher counts indicating lower density materials.
2.1 Well 951R
Well 951R is presently being used to supply fresh water for injection in the North Off-Site area. The well was logged from the top to a depth of 420 feet with video camera, gamma ray, 3-arm caliper, sonic, and 4 Pi density.
2.1.1 951R Lithology and Well Completion
Well 951R was drilled in 2012 and cased with 14 inch steel casing to a depth of 84 feet, 8" steel casing to a depth of 410, and open hole completion down to 525 feet. The annulus of the well was cemented from 0 to 410 feet using the Halliburton method. The water level in well 95 lR is representative of the San Andres aquifer. Figure 2-1 presents the well completion details and the lithology for well 951R which indicates the top of the San Andres aquifer is at a depth of 420 feet below the land surface.
Grants Reclamation Project 1'1 Quarter 2016 San Andres Integrity Testing
2-1
2.1.2 951R Geophysical Logs
Gamma ray, caliper,. amplitude, delta time and, 4 Pi density logs were run on well 951R on March 1, 2016 to evaluate the integrity of this well (see Figure 2-2). The gamma log indicates less permeable material between 97 and 142 feet, which generally corresponds to the clay and shale interval on the lithologic log. The caliper log was run on an enhanced scale of 5-15 inches, and shows that the casing inside diameter (ID) is a consistent 8.1" indicating no major scaling.
The sonic logs show an attenuated interval between 230 and 385 feet. The higher amplitude bands in this section line up primarily with casing joints (270, 290, 310, 350, and 370 feet). The higher amplitude from 385 feet to 410 feet may be caused by limestone behind the casing.
The near First Arrival appears ahead of the VDL due to adjustm~nt in the ·VDL shading and also · indicates some attenuation along most of the casing.
The 4 Pi Density arid the Focused Dehsity both indicated void spaces behind the casing from 82 . to 107 feet.
2.1.3 951R Video
A video of the 951 well was co~ducted on March 1, 2016 and is presented .in Appendix A with the video ofw'ell 943 as well. The video ofwell 951R above the water level at 153 feet shows ':t10 sign of water from the alluvial aquifer entering the.casing. )'he base of the alluvial aquifer is .. at approximately 65 feet below land surface and the alluvium should be dry at this location. :The . water in the well was murky in a large portion of the casing but clears up near 330 feet. The video appears to show that the formation below 417 feet has. collapsed.
2.1.4 , Summary of WeH 951R Integrity Testing
The geophysical logs and video for well 95 lR demonstrate that this well casing integrity is good. Well 951R is acceptable to continue to be used as a fresh water injection supply for the Grants restoration, program.
Grants Reclamation Project 2-2 1'1 Quarter 2016 San Andres Integrity Testing
2.2 Well 943
Well 943 is presently being used to supply fresh water for injection in the South Off-Site area. The well was logged from the top to a depth of 722 feet with video camera, gamma ray, 3-arm caliper, sonic, and 4 Pi density.
2.2.1 943 Lithology and Well Completion
Well 943 was drilled in 1952 and cased with 18" steel casing from the surface to 304 feet, 16" steel casing from 271 to 408 feet, 13" steel casing from 347 to 510 feet, 10" steel casing from 459 to 703 feet, and an open hole completion from 703 to 978 feet. Figure 2-3 presents the lithologic log for well 943 which indicates the top of the San Andres aquifer is at a depth of743 feet below the land surface.
2.2.2 943 Geophysical Logs
Gamma ray, caliper, amplitude, delta time, and 4 Pi density logs were run on well 943 on ¥arch 1, 2016 to evaluate the integrity ofthis well.
The base of the alluvium in thought to be 33 feet below land surface based on the gamnia log or 48 feet based on the lithologic log. The Middle Chin1e sandstone is thought to exist from 226 to -274 feet below land surface as shown on the gamma log.
The caliper log is presented on a sea.le from 9 to 19 inches. The log shows a casing diameter of 17.5 inches from the surface to 272 feet, a 15.T' casing diameter from 272 to 347 feet, a 12.7 inch diameter from 347 to 459, and a 10.7 inch diameter casing from 459 to 702. An open hole is shown from 702 to 727 feet with the bottom two feet being sediment. The log shows variations in these casing diameters due to corrosion and nodules that have built up on the casing.
The sonic logs show a strong signal difference as the casing diameter reduces. These changes in casing diameter are shown on both of the 3 arm caliper plot and on the VDL near-stacked plot at 272, 347, and 459 feet. An attenuated section is shown between 126 and 347 feet indicated either a heavily weathered section, cementing behind the casing, or a dry formation. From 347 to 459 feet a mostly un-attenuated section which may indicate a sleeve that is not cemented. The high ringing response (un-attenuated) from 459 to 579 feet is likely in response to the smaller casing size. The faint change in response at 704 feet may indicate the top of the limestone formation behind the casing.
The 4 Pi Density log showed the various casing sizes changes with the exception of the lowest density section near 300 feet which may represent the area of highest corrosion. The Focused Density log was less affected by the diameter changes and generally followed the 4 Pi log, but showed more character likely due to the weathered condition of the casing.
Grants Reclamation Project 1"1 Quarter2016 San Andres Integrity Testing
2-3
2.2.3 943 Video
A video of the 943 well was conducted on March 1, 2016 and is presented in Appendix A with the video ofwell 951R. The video ofwell 943 shows no intrusion of alluvial water into the casing. Nodules, both circular and pipe-like in shape, were commonplace below 172 feet in the well casing. Three small diameter pipes were found below 702 feet in the open hole completion portion of the well. The video appears to show at 725 feet the well has either collapsed or filled in with sediment.
2.2.5 Summary of Well 943 Integrity Testing
The geophysical logs and video for well 943 demonstrate that the casing has considerable corrosion but the video of the well does not show any significant leakage of alluvial water into the well. The alluvium is likely dry, based on the depth to its bottom at this location. Therefore, the ·well integrity for well 943 is adequate for continued use as a supply for fresh water injection.
Grants Reclamation Project 2-4 I'' Quarter 2016 San Andres Integrity Testing
Figure 2-1
Well 95 lR Completion Details and Lithology
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Figure 2-3
Well 943 Completion Details and Lithology
STATE ENGINEER OFFICE
WELL RECORD
Section 1. GENERAL INPORMATlON
(Al Owner or well 1 lorncs:akc Mining Company of Ca. Owner's Well No. -"0..;.9..;.4:''-'-----,-Street or Post Office Address......_....._.~...,_=-----------------------------City and Statr Grant~ NM 870?0
un~nown W•ll was drilled under Permit No. _______ ______ and is located in the :
a. NE ~ :-.,--w ~ ~ V. ___ V. of Scc tion _ 3_4 ___ Towns.hip _1~2~1\-' ___ Rani;e _ 1_0_,_v ___ ~N .M.P.M .
b. Trac t No. ____ _ oOhp No.------ - of the - --------------------c, Loi No. ____ or mock No. _ ______ of th•------------------- --
Subdivision, recorded in County.
d. X= ------ (cct, Y=-------- feel , N.M. Coordinate Syslem _ __________ Zone in the Gran I.
{B} Drilling Contraclor __ UI_>k_n_o_w __ n _________________ Licen!e No. __ w_ik_r._0 _" _·:1 _____ _
unknown AddrtU---------------------·------- --------------
Drilling Beg.on -------- Com pl< led __ l!_l_i 1_9_S_O ___ Typc tool•-------- Size of hole ___ in .
Eleva tion of land surface or------------ at well i•----- fl . To tal depth of wc1J_9~7~8 ____ rr.
Completed well is 0 shallow C3 orlesian. Depth lo waler upon completion of w.\l _ 1_0_7_.0_7 ___ fl.
Section 2. PRINCIPAL WATER·lJEARING STRATA Depth in Feet Thickness
Dw:riplion of W•lcr-!lcarL'lg Pormalion Estimated Yield
From To in Feet (gallons per minute)
743 978 235 Sx1d) Limestone l
Section 3. RECORD OF CASIKG
Dl,arnelcr rounds Threads Depth in Pcot Length Type of Shoe Per Con lions
(1nche!l per foot per in . Tuo Bottom (!ect) rrom TQ
18" ~tcel 0 I 304
16" 155 "-08
13" 347 5'0 iO" 460 70.l orcn bole 703 978
Section 4. RECORD or MUDDING AND CEMENTING
I Depth ' " r .. t ll o le Sacks Cubic Feel Method or Pl•cemen t Frorn To Di:unc tcr of Mud of Cement
Section 5. PLUGGI NG RECORD
Plugging Contraclor ------------------Addrc5' Depth in F<cl Cl1bic Feet Plugging Method No.
Top Bottom or Ccm~nt Date Well Pluige" I Plugging approved by: 2
3 State Enginee: Rcprescntalh·e 4
fOR USE OF STATE ENGINE!JR ONLY Date Rece ived
Quad _______ _ FWL ---- FSL ___ _
file No. ________________ Use _______ Local:on No. ___________ _
..._
'--Oeplh in Feet
From ! To (I JO :o 18 18 26 26 ~8
48 66 66 100
100 1J. l !} I 145 l.+5 157 157 177
177 186 186 225 225 275
:75 304 304 325 325 395
3Q5 3q7
397 40~
.+O& i +-ll
441 45 I
468 473
t.73 512
512 575
575 653
653 668
668 705
705 712
712 724
724 743
743 8-"8
~'-8 851
851 S70
870 874
874 K'ix
Thick:iess / J
in Feet i surrncc sod
black sand yi:.:k1w clay sand
s11ah:. red cby
hrov.-u sh:Jlc blue sh.1tc
-,a11ds.wne blue shale san<ls10nc blue sbak >and r~d sl:a~c
sand. gravd blue shale
~and gravel
l:ard Lime
blue si1alc
bro\\ n ;andy shale
Color :rnd Type of Material Eneou :1tered
b:okea shale and conglomerate
red ~hale
red shale
blue shak
red s_ri:;.Jc streaks of S2.nd \1<'1J'!.C
sandy limo
y:;llm\ S411ld
iine white "a:cr sand
~:tnd and ~ron l)yria!:-.
sand (ha:d)
Section 7 REMARKS ANO ADDITIONAL INFORllA TION
The u·n:fonigned hert by ccrtilics that, to the best_ of :iis knowledge and belie:, lhc foregoing is a true and correct rec.or::i ur the above described hole.
Dri!ler
INSTRUCTIONS: Th:s form should be execulcd i" lripLca1c, preferably '.yptwrilten, and submit led to the appro?nate di1lrict office of fhe State Er1ginccr Alt sections, except Section 5, :shall be aC'!swered as completely and 11 c1:ura. tc l)' as possible when 1ry wcfl is dri.lkd. re7,.aired '1r dte;cnc:d Wher. this for :n i:i used as ;i ?lugging record or.)}' Scctlo11 t{a) and Sec t.on 5 need~ complet l'd
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Figure 2-4
Well 943 Geophysical Logs
•
~
JET WES ~ ~
~ GEOPHYSICAL SERVICES, LLC. ...._.....-
COMPANY Homestake Mining Company
WELL ID 943
FIELD Grants
COUNTY Cibola STATE New Mexico
TYPE OF LOG: G~ma ~ay, 3 ~rm Caliper, OTHER SERVICES
Some, 4 Pi Density Video
Oil Oil c:
~ c: LOCATION
0 ·~ z w
SEC RGE TWP APINo.
PERMANENT DATUM Ground Level ELEVATION K.B.
LOG MEAS. FROM Ground Level ABOVE PERM. DATUM T.0.C
DRILLING MEAS. FROM Ground Level G.L.
DATE 02-29to03-0l-2016 TYPE FLUID IN HOLE water RUN No. One SALINITY
TYPE LOG QL-GR-3Ann, 4Pi, Sonic DENSITY
DEPTH-DRILLER 978 ft. LEVEL 125 ft.
DEPTH-LOGGER 727 ft. MAX. REG. TEMP
BTM LOGGED INTERVAL 727 ft. DIGITIZE INTERY AL 0.1 &0.5 fl .
TOP LOGGED INTERY AL Surface
OPERA TING RIG TIME
RECORDED BY T. Staatz /J. White
WITNESSED BY D. Kump
RUN BOREHOLE RECORD CASING RECORD
NO. BIT FROM TO SIZE WGT. FROM TO
1 18 in. Steel -2.l 978 fl.
2
3
REMARKS :
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80 "1ft:240ft ' 0 .
0 API 142.182 200 800 1.5 glee 3.5
3.0 San Andres Ground-Water Quality
Monitoring of San Andres ground-water quality in the Grants project area is being used to determine if any of the San Andres wells currently used to supply fresh water for the groundwater restoration program have exhibited a change in casing integrity that is reflected in water quality changes. Additional monitoring of the four San Andres wells that HMC uses to supply fresh water has been done in 2016. This data will be tabulated in the Annual Performance report, but for convenience, updated water quality plots are presented in this report for the evaluation of these wells.
3.1 Sulfate Concentrations
Sulfate is a major constituent that has been used to track water quality changes at the Grants Reclamation Project. Figure 3-1 presents an updated plot of the sulfate concentrations in San Andres wells 943, 951, 951R, #1 and #2. This plot has been presented in the Annual Performance report. Figure 3-1 shows sulfate concentrations for the 1st quarter of2016 for wells 943, 951R, #1 and #2, and reveals that these concentrations are consistent with the concentrations measured since 2011 except for a high value from well 943 in late 2015. The values prior and after the higher value are consistent and indicate that it is an outlier. There was no measurable change in sulfate concentration in 2016, and this is indicative of no change in the well integrity for any of these four San Andres supply wells in 2016.
Figure 3-2 presents the plot of sulfate for irrigation supply wells 806R and 938 and two of the Milan supply wells (wells 532 and 999). No 2016 samples have been taken for these wells.
3.2 TDS Concentrations
TDS is also a major parameter that has been used to track water quality changes at the Grants project. Figure 3-3 presents a plot of the TDS concentrations in San Andres wells 943, 951, 95 lR, # 1 and #2. This plot shows that the 2016 TDS concentrations are very similar to previous values for wells 943, 95 lR, # 1 and #2. The late 2015 value from well 943 is thought to be an outlier. This plot does not indicate any change in the well integrity for any of these four San Andres supply wells in 2016.
Figure 3-4 presents the plot of sulfate for irrigation supply wells 806R and 938 and Milan supply wells 532 and 999. No 2016 samples have been taken for these wells.
3.3 Chloride Concentrations
Chloride is a major constituent that typically moves very conservatively and has been used to track water quality changes at the Grants Reclamation Project. Figure 3-5 presents a plot of the chloride concentrations in San Andres wells 943, 951 , 95 lR, # 1 and #2. This plot shows that the 2016 chloride concentrations are very similar to previous values for wells 943, 951R, #1 and #2. This plot does not indicate any change in the well integrity for any of these four San Andres supply wells in 2016.
Gran ts Reclamation Project 3-1 l " Quarter 20 16 San Andres Integrity Testing
Figure 3-6 presents the plot of chloride for irrigation supply wells 806R and 938 and Milan supply wells 532 and 999 through 2015. Samples for these wells have not been taken in 2016.
3.4 Uranium Concentrations
Uranium is a minor constituent that is very important relative to ground-water restoration at the Grants project. Figure 3-7 presents a plot of the uranium concentrations in San Andres wells 943, 951 , 951R, #1 and #2. This plot shows that the recent uranium concentrations are very similar to previous values for wells 943, 951R, #1 and #2. The increase in uranium concentration in well 95 lR that was observed in 2014 prior to the 2015 decline is not thought to be a function of changes in well integrity in 95 lR, but is attributed to changes in the San Andres aquifer water quality in this area. The uranium concentration was higher in the late 2015 sample from well 943, but values before and after that sample indicate it is an outlier. This plot does not indicate any change in the well integrity for any of the San Andres supply wells in 2016.
Figure 3-8 presents the plot of uranium from 2000 through 2015 for irrigation supply wells 806R and 938 and two of Milan supply wells 532 and 999. 2016 samples have not been taken for these wells.
3.5 Selenium Concentrations
Selenium is also a minor constituent that is very important relative to ground-water restoration at the Grants project. Figure 3-9 presents a plot of the selenium concentrations in San Andres wells 943, 951 , 951R, #1 and #2. This plot shows that the most recent selenium concentrations are very similar to previous values for wells 943, 95 lR, #1 and #2. The higher value from well 943 in late 2015 is thought to be an outlier. This plot does not indicate any change in the well integrity for any of these four San Andres supply wells in 2016.
Figure 3-10 presents the plot of selenium for irrigation supply wells 806R and 938 and two of Milan supply wells 532 and 999. 2016 samples have not been taken for these wells.
Grants Reclamation Project 3-2 ! ' 'Quarter 2016 San Andres Integrity Testing
Figure 3-1
Sulfate Concentrations for San Andres Wells 943, 951 , 951R, #1 Deep Well, and #2 Deep Well
1500
1000
::::::::. CJ)
E ...
w I-~ _J
:::::> (./)
500
Legend
• 943
• 951 .. 951R
* #1
e #2
9 I I I
I
--~~~ .~_.
~
2000 200120022003 2004 2005 2006 2007 2008 2009 2010 201120122013 2014 2015 2016 2017
FIGURE 3-1. SULFATE CONCENTRATIONS FOR SAN ANDRES WELLS 943, 951, 951R, #1 & #2.
Figure 3-2
Sulfate Concentrations for San Andres Wells 532, 806R, 938, and 999
1500
1000
::::::::.. O'l E
... UJ r-Lt _J
:::> Vl
500
Legend
• 532
• 806R
• 938
0 999
... • ----. . ~
2000 200120022003 2004 2005 2006 2007 2008 2009 2010 201120122013 2014 2015 2016 2017
FIGURE 3-2. SULFATE CONCENTRATIONS FOR SAN ANDRES WELLS 532, 806R, 938 8t 999.
Figure 3-3
TDS Concentrations for San Andres Wells 943, 951 , 951R, #1 Deep Well, and #2 Deep Well
2500
2000
1500 :::::::::.. Ol E
... (/)
0 I-
1000
500
0
. ... - ~ ... ~·
Legend
• 943
• 951 ... 951R
* #1
-e---- #2
2000 200120022003 2004 2005 2006 2007 2008 2009 2010 201120122013 2014 2015 2016 2017
FIGURE 3-3. TDS CONCENTRATIONS FOR SAN ANDRES WELLS 943, 951, 951R, #1 & #2.
Figure 3-4
TDS Concentrations for San Andres Wells 532, 806R, 928, and 999
2500
2000
1500 ::::::::.. Ol E
1000
500
Legend
• 532
• 806R
• 938
0 999
2000 200120022003 2004 2005 2006 2007 2008 2009 2010 201120122013 2014 2015 2016 2017
FIGURE 3-4. TDS CONCENTRATIONS FOR SAN ANDRES WELLS 532, 806R, 938 & 999.
Figure 3-5
Chloride Concentrations for San Andres Wells 943, 951 , 951R, #1 Deep Well, and #2 Deep Well
500
400
-.... Ol 300 E
.... w 0 ........ ~ 0 _J
:I: u 200
100
Legend
• 943
• 951 .. 951R
* #1
e #2
-0---Cf -e-----e--
2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017
FIGURE 3-5. CHLORIDE CONCENTRATIONS FOR SAN ANDRES WELLS 943, 951, 951R, #1 & #2.
Figure 3-6
Chloride Concentrations for San Andres Wells 532, 806R, 938, and 999
500
400
:::::::.. (j') 300 E
... w 0 t---4
0::: 0 .....I :r:: 200 u
100
Legend
• 532
• 806R
938
0 999
• • ~
2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017
FIGURE 3-6. CHLORIDE CONCENTRATIONS FOR SAN ANDRES WELLS 532, 806R, 938 & 999.
Figure 3-7
Uranium Concentrations for San Andres Wells 943, 951 , 951R, #1 Deep Well, and #2 Deep Well
0.5
0.4
:::::::.. 0.3 Cl
E ... ~ ::::> ....... z ~ 0.2 ::::>
l Legend
• 943
• 951 .. 951R
\ * #1
e #2
2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017
FIGURE 3-7. URANIUM CONCENTRATIONS FOR SAN ANDRES WELLS 943, 951, 951R, #1 & #2.
Figure 3-8
Uranium Concentrations for San Andres Wells 532, 806R, 938, and 999
0.5
0.4
::::::::. 0.3 O>
E ... ~ ::::::> -z ~ 0.2 ::::::>
0.1
Legend
• 532
• 806R
• 938
0 999
2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017
FIGURE 3-8. URANIUM CONCENTRATIONS FOR SAN ANDRES WELLS 532, 806R, 938 8t. 999.
Figure 3-9
Selenium Concentrations for San Andres Wells 943, 951 , 951R, #1 Deep Well, and #2 Deep Well
0.5
0.4
....._ 01 0.3 E .. ~ :::::> .....c z w _J
w 0.2 V>
0.1
Legend
• 943
• 951 .. 951R
* #1
0 #2
2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017
FIGURE 3-9. SELENIUM CONCENTRATIONS FOR SAN ANDRES WELLS 943, 951, 951R, #1 & #2.
Figure 3-10
Selenium Concentrations for San Andres 532, 806R, 938, 999
0.5
0.4
--CJ) 0.3 E
... :E :::> ~
z w ....J w 0.2 Cf)
0.1
Legend
• 532
• 806R
• 938
0 999
2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017
FIGURE 3-10. SELENIUM CONCENTRATIONS FOR SAN ANDRES WELLS 532, 806R, 938 8t 999.
4.0 Conclusion
The San Andres well integrity testing for well 951R shows that the integrity of this well is good and the well can be used as a fresh water supply well. The casing in San Andres well 943 has considerable corrosion but the video of the well does not show any significant leakage of alluvial water into the well. Therefore, the well integrity for well 943 is adequate for its continued use as a fresh water injection supply well.
The San Andres monitoring in 2016 does not indicate that the integrity of the existing San Andres supply wells # 1 and #2 well has changed. These San Andres wells can continue to be used as a fresh water supply. Well integrity testing for these two wells is planned for 2016.
Grants Reclamation Project l" Quarter 2016 San Andres Integrity Testing
4-1
5.0 · References
Hydro-Engineering, L.L.C., 2015, Grants Reclamation Project, 2014 Annual Monitoring Report/Performance Review for Homestake's Grants Project Pursuant to NRC License SUA-1471 and Discharge Plan DP-200. Consulting Report for Homestake Mining Company of California.
Grants Reclamation Project 1'1
Quarter 2016 San Andres Integrity Testing 5-1
APPENDIX A
Video of Wells 951R and 943 (see CD)