Chemical analyses of major, minor, and trace elements including gold and the arsenic species, As(III) and As(V), in water samples collected along the Getchell Trend, Humboldt County, Nevada
<p>No abstract available.</p>
Public-domain full text preserved in the Mountain Man Mining Library. Original source: pubs.usgs.gov.
U.S. DEPARTMENT OF THE INTERIOR U.S. GEOLOGICAL SURVEY Chemical analyses of major, minor, and trace elements including gold and the arsenic species, As(III) and As(V), in water samples collected along the Getchell Trend, Humboldt County, Nevada by D.J. Grimes,* J.B. McHugh,* and A.L. Meier* Open-File Report 95-636 This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards and stratigraphic nomenclature. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. *U.S. Geological Survey, DFC, Box 25046, MS 973, Denver, CO 80225
CONTENTS Page Introduction 1 Sample collection 2 Analytical methods 3 Description of Table 2 3 Acknowledgements 4 References cited 5 ILLUSTRATIONS Figure 1. Index map showing the location of the Preble, Pinson, Getchell, and Twin Creeks disseminated gold deposits, Humboldt County, Nevada 2 Plate 1. Map showing water samples sites, Humboldt County, Nevada . in pocket TABLES Table 1. Analytical methods used for the analyses of water samples 6 Table 2. Analytical data for water samples, Humboldt County, Nevada 7
INTRODUCTION The Getchell Trend, a 25 mile long northeast trending fault system, is located in north-central Nevada in Humboldt County about 45 miles northeast of Winnemucca, and contains several known buried disseminated gold deposits including the Pinson, Preble, Getchell, and Twin Creeks deposits (Fig. 1). The gold deposits are hosted primarily in sedimentary rocks of lower Ordovician age (Parratt and others, 1989), and the gold generally exists as sub-micron size particles of native gold. Other minerals associated with these Carlin-type gold deposits include orpiment, realgar, and stibnite. A hydrogeochemical study was undertaken by the U.S. Geological Survey in 1989 to determine if the chemistry of ground water would reveal the presence of the concealed gold deposits along the Getchell Trend. Ground-water samples were collected from drill holes in the vicinity of the known gold deposits and from nearby wells and creeks. This report includes a map showing the location of water sample sites (plate 1), a table of the analytical methods used (table 1), and a tabulation of the hydrogeochemical data (table 2). SAMPLE COLLECTION During the period 1989-1993, 282 ground-water samples were collected from 72 sample sites. The samples were collected primarily from drill holes during active drilling and from exploration drill holes that were several years old. The water samples collected during drilling were obtained from reverse-circulation rotary drill rigs. The samples were taken at 60- to 100-ft intervals during drill-pipe changes, immediately after water in the drill hole had been purged. No drilling mud was used in any of the drill holes sampled, and little, if any, injection water was added. The water samples from the old drill holes were collected at and below the water table using a custom-built double-check valve bailer with a maximum volume of 1.25 L. The bailer was lowered into the drill holes with nylon cord to sampling depths as great as 720 ft below the ground surface. The check-valve system of the bailer enabled water to be trapped and retrieved from any desired depth below the water table. A 50-mL water sample from each sample location was filtered in the field through a 0.45-micron membrane filter and acidified to a pH less than 2 with five drops of concentrated nitric acid. Also, 2 untreated water samples with volumes of about 200 mL and 1000 mL were collected at each location. For samples selected for the determination of the arsenic species, arsenite [As(III)] and arsenate [As(V)], a 10-mL aliquot of water was filtered through a 0.45-micron filter and preserved with one
117° Figure 1. Index map showing the location of the Preble, Pinson, Getchell, and Twin Creeks disseminated gold deposits, Humboldt County, Nevada; the water sampling area is outlined
drop of concentrated hydrochloric acid. All the samples were stored in acid-rinsed polyethylene bottles. Temperature, alkalinity, specific conductance, and pH were measured at the sample site. The Eh of water samples collected with a bailer from the old drill holes was measured in the field using a platinum electrode. All other analytical constituents were determined at the Branch of Geochemistry, U.S. Geological laboratories in Denver, Colorado. ANALYTICAL METHODS Gold was determined in the 1000-mL water samples after filtration and acidifica- tion in the laboratory using anion-exchange graphite-furnace atomic-absorption spectrometry. Arsenic, antimony, tungsten, and other trace elements were determined in the filtered, nitric acid acidified samples, by inductively coupled plasma-mass spectrometry (ICP-MS). Calcium, iron, magnesium, manganese, potassium, silica, and sodium were determined by flame atomic absorption spectroscopy using the same sample aliquot used for the ICP-MS analysis. Chloride, fluoride, nitrate, and sulfate were determined by an ion chromatography technique using the untreated sample. Concentrations of the arsenic species, As(III) and As(V), were determined by ion- exchange graphite-furnace atomic-absorption spectrometry. The concentrations of these two species of arsenic commonly provide an approximation of the relative oxidation-reduction conditions (redox potential) present at the depth of sample collection. The analytical methods used to measure each constituent in the water samples are listed in table 1. DESCRIPTION OF TABLE 2 Table 2 lists the field measurements and the chemical analyses for the water samples. The data are arranged so that column 1 contains the USGS-assigned sample numbers. These sample numbers correspond to the numbers shown on the site location map (plate 1). The sample numbers shown on table 2 are suffixed with the month and year of sample collection. Columns 2 and 3 list the latitude (north) and longitude (west) for each sample site in degrees, minutes, and seconds. Column 4 lists the depth of sample collection, measured in feet below the ground surface. Column 5 lists the depth to the water table at the time of sample collection. The remaining columns list analytical data. The concentrations of the arsenic species, arsenite [As(III)] and arsenate [As(V)], are listed in columns 9 and 10, respectively, and the total arsenic (As-T) concentrations are listed in column 11. Gold concentrations are given in nanograms per liter (note: 1 ng/L equals 1-part- per-trillion). Fe, Mn, Ca, K, Mg, Na, Cl, NO3, SO4, F, and SiO2 are given in milligrams
per liter (note: 1 mg/L equals 1-part-per-million). All other element concentrations are given in micrograms per liter (note: 1 ug/L equals 1-part-per-billion). The Eh values are given in millivolts (mV) and are not corrected for junction potential. The alkalinity (Alk) values are reported in milligrams per liter total alkalinity as calcium carbonate (CaCO3). Specific conductance (Cond) is given in microSiemens/cm (uS). If an element was analyzed but not detected in a sample, then a "less than" symbol was entered in the table followed by the lower limit of determination. The symbol "-" indicates the measurement was not made. ACKNOWLEDGMENTS The authors extend appreciation to FirstMiss Gold Inc. for permission to sample water and rock from drill holes and for sharing their time, expertise, and drill hole logs with us.
REFERENCES CITED Ficklin, W.H., 1983, Separation of arsenic(III) and arsenic(V) in ground waters by ion- exchange: Talanta, v. 30, p. 371-373. Fishman, M.J., and Pyen, Grace, 1979, Determination of selected anions in water by ion chromatography: U.S. Geological Survey Water Resources Investigations 79- 101, 30 p. Grimes, D.J., Ficklin, W.H., Meier, A.L., and McHugh, J.B., 1995, Anomalous gold, antimony, arsenic, and tungsten in ground water and alluvium around disseminated gold deposits along the Getchell Trend, Humboldt County, Nevada. Journal of Geochemical Exploration, v. 52, p. 351-371. McHugh, J.B., 1986, Determining gold in water by ion-exchange batch extraction, Talanta, v. 33, p. 349-351. Orion Research Inc., 1978, Orion Research analytical guide (9th ed.): Cambridge, Mass., 48 p. Parratt, R.L., Tapper, C.J., and Bloomstein, E.I., 1989, Geology and mineralization of the Rabbit Creek gold deposit, Humboldt County, Nevada: Geological Society of Nevada Monthly Meeting Announcement, April, 1989, v. 1, no. 7. Perkin-Elmer Corporation, 1976, Analytical methods for atomic absorption spectrophotometry: Norwalk, Conn., Perkin Elmer Corp., 586 p.
Table 1 Analytical methods used for the analyses of vater samples Variable Method Reference Alkalinity Gran's plot potentioaetric titration Orion Research Inc. (1978) Cl, F, N03 , S04 Ion chroaatography Fishaan and Pyen (1979) Ca, Fe, K, Mg, Mn, Na, Si02 Flaae atoaic absorption spectrophotoaetry Perkin-Elaer Corp. (1976) Ag, As, Cd, Co, Cr, Cu, Ge, Mo, Pb, Sb, tf, Zn Inductively coupled plasaa-aass spectroaetry Griaes and others (1995) Au Anion exchange - flaaeless atoaic absorption Mcflugh (1986) As species - As(III), As(V) Anion exchange - flaaeless atoaic absorption Ficklin (1983)
Table 2. Analytical data for water samples collected near the Getchell Trend, Hufflboldt County, Nevada Sample f 88-100-A-FB91 88-100-B-FB91 88-104-A-MR92 88-104-B-MR92 88-104-C-MR92 88-108-A-FB91 88-108-B-FB91 88-108-C-FB91 88-117-A-FB91 88-117-B-FB91 88-124-JN91 88-175-A-FB91 88-175-B-FB91 Latitude Longitude 117 12 28 117 12 28 117 12 09 117 12 09 117 12 09 117 12 04 117 12 04 117 12 04 117 12 04 117 12 04 117 12 18 117 11 38 117 11 38 Sample Depth Water Table pfi (Ft.) Eh Depth (Ft.) fflV
Au ng/L
As(III) As(V) As-T ug/L ug/L ug/L
Sb ug/L W Fe ug/L /L
Mn /L Ge ug/L Mo ug/L
Saiple 88-100-A-FB91 88-100-B-FB91 88-104-A-MR92 88-104-B-MR92 88-104-C-MR92 88-108-A-FB91 88-108-B-FB91 88-108-C-FB91 88-117-A-FB91 88-117-B-FB91 88-124-JN91 88-175-A-FB91 88-175-B-FB91 Ca K Mg /L og/L ig/L Na /L /L N03 /L S04 /L F /L
Alk. /L
Si02 Ag /L ug/L Cd Co ug/L ug/L Cr ug/L Cu Pb ug/L ug/L
Zn ug/L Cond. uS Temp. °F
Table 2. Continued CO Sample f 88-179-A-JN91 88-179-B-JN91 88-179-C-JN91 88-179-D-JN91 88-179-E-JN91 88-179-F-JN91 88-179-G-JN91 88-181-A-FB91 88-181-B-FB91 88-181-C-FB91 88-181-D-FB91 88-181-E-FB91 88-181-F-FB91 88-183-A-FB91 88-183-B-FB91 Latitude Longitude 117 11 18 117 11 18 117 11 18 117 11 18 117 11 18 117 11 18 117 11 18 117 11 28 117 11 28 117 11 28 117 11 28 117 11 28 117 11 28 117 10 45 117 10 45 Sample Depth Water Table pH (Ft.) Depth (Ft.) Eh mV Au ng/L As(III) As(V) As-T ug/L ug/L ug/L
: Sb ug/L S Fe g/L Mn g/L Ge ug/L (K2 Mo ug/L Sample I 88-179-A-JN91 88-179-B-JN91 88-179-C-JN91 88-179-D-JN91 88-179-E-JN91 88-179-F-JN91 88-179-G-JN91 88-181-A-FB91 88-181-B-FB91 88-181-C-FB91 88-181-D-FB91 88-181-E-FB91 88-181-F-FB91 88-183-A-FB91 88-183-B-FB91 Ca K Mg rag/L rag/L ig/L Na nig/L nig/L N03 S04 nig/L ing/L F nig/L
Alk. /L Si02 g/L Ag ug/L
Cd ug/L Co ug/L Cr ug/L Cu ug/L
Pb ug/L Zn ug/L Cond. uS Temp. °F 58,3
Table 2. Continued Sample I 88-184-A-JN91 88-184-B-JN91 88-184-C-JN91 88-184-D-JN91 88-184-E-JN91 88-184-F-JN91 88-MW1-JN91 88-MW2-JN91 88-MW5-JN91 88-MW6-JN91 89-36-APR91 o 89-42-FB91 Latitude Longitude Saiple Depth Water Table pH (Ft.) Depth (Ft.) Eh Au ng/L
As(III) As(V) As-T ug/L ug/L ug/L
Sb ug/L W ug/L
Fe Mn mg/L mg/L Ge Mo ug/L Saiple I 88-184-A-JN91 88-184-B-JN91 88-184-C-JN91 88-184-D-JN91 88-184-E-JN91 88-184-F-JN91 88-MW1-JN91 88-MW2-JN91 88-MW5-JN91 88-MW6-JN91 89-36-APR91 89-42-FB91 Ca ig/L K ig/L Mg ig/L Na mg/L ig/L N03 ig/L S04 ig/L F Alk. ig/L mg/L Si02 ig/L Ag ug/L
Cd Co pg/L ug/L Cr ug/L Cu ug/L
Pb Zn ug/L ug/L Cond. uS Temp. °F
Table 2. Continued Saiple i 89-51-FB91 89-120-A-JN90 89-120-B-JN90 89-203-A-MR92 89-203-B-MR92 89-203-C-MR92 89-211-A-JN91 89-211-B-JN91 89-211-C-JN91 89-211-D-JN91 89-211-E-JN91 Latitude Longitude 117 12 17 117 15 54 117 15 54 117 12 15 117 12 15 117 12 15 117 10 51 117 10 51 117 10 51 117 10 51 117 10 51 Saiple Depth (Ft.) Hater Table pH Depth (Ft
.) Eh
Au ng/L As(III) As(V) As-T ug/L
ug/L ug/L Sb ug/L W Fe ug/L ig/L
Mn ig/L Ge ug/L 02 Mo ug/L H-4 Saiple i CD 89-51-FB91 89-120-A-JN90 89-120-B-JN90 89-203-A-MR92 89-203-B-MR92 89-203-C-MR92 89-211-A-JN91 89-211-B-JN91 89-211-C-JN91 89-211-D-JN91 89-211-E-JN91 Ca K Mg ig/L ig/L ig/L Na ig/L ig/L N03 ig/L O.'l S04 ig/L F ig/L Alk. ig/L Si02 Ag ig/L ug/L Cd Co ug/L ug/L Cr ug/L Cu Pb ug/L ug/L
Zn ug/L Cond. uS Temp. °F
Table 2. Continued Sample 89-212-A-AUG90 89-212-B-AUG90 89-212-C-AUG90 89-212-D-AUG90 89-212-E-AUG90 89-212-A-MY92 89-212-B-MY92 89-214-A-JM90 89-214-B-JN90 89-215-A-AUG90 89-215-B-AUG90 89-215-A-MY92 89-215-B-MY92 89-215-C-MY92 89-224-AUG90 Latitude Longitude 117 11 19 117 11 19 117 11 19 117 11 19 117 11 19 117 11 19 117 11 19 117 13 08 117 13 08 117 11 14 117 11 14 117 11 14 117 11 14 117 11 14 117 10 59 Sample Depth Water Table pH (Ft.) Depth (Ft.) Eh nV Au ng/L As(III) As(V) ug/L
ug/L As-T ug/L Sb ug/L W ug/L
Fe ig/L Mn ng/L Ge ug/L Mo ug/L Sample f 89-212-A-AUG90 89-212-B-AUG90 89-212-C-AUG90 89-212-D-AUG90 89-212-E-AUG90 89-212-A-MY92 89-212-B-MY92 89-214-A-JN90 89-214-B-JM90 89-215-A-AUG90 89-215-B-AUG90 89-215-A-MY92 89-215-B-MY92 89-215-C-MY92 89-224-AUG90 Ca K Mg ig/L ig/L ng/L Na ng/L ig/L N03 ig/L S04 ng/L F ig/L
Alk. ig/L Si02 ig/L Ag ug/L
Cd ug/L
Co MA Cr ug/L Cu ug/L
Pb ug/L Zn ug/L Cond. PS Teip. op
Table 2. Continued Sample I 90-2-AUG90 90-3-JN90 90-5-JN90 90-137-MR92 91-79-A-APR91 91-79-B-APR91 91-79-C-APR91 91-79-D-APR91 91-79-E-APR91 91-79-F-APR91 91-79-G-APR91 91-79-H-APR91 91-79-I-APR91 Latitude Longitude 117 11 03 117 11 15 117 10 55 117 12 00 117 11 24 117 11 24 117 11 24 117 11 24 117 11 24 117 11 24 117 11 24 117 11 24 117 11 24 Sample Depth (Ft.) Hater Table pH Depth (Ft.
) Eh fflV Au ng/L
As(III) As(V) As-T ug/L
ug/L ug/L Sb ug/L W ug/L
Fe /L Mn /L Ge ug/L Mo ug/L Sample i 90-2-AUG90 90-3-JN90 90-5-JN90 90-137-MR92 91-79-A-APR91 91-79-B-APR91 91-79-C-APR91 91-79-D-APR91 91-79-E-APR91 91-79-F-APR91 91-79-G-APR91 91-79-H-APR91 91-79-I-APR91 Ca K Mg /L /L 9ig/L Na /L /L N03 /L S04 /L F /L
Alk. /L Si02 Ag /L ug/L Cd Co ug/L ug/L Cr ug/L Cu ug/L
Pb ug/L Zn ug/L
Cond. uS Temp. 'F
Table 2. Continued Sample f 91-124-A-JN91 91-124-B-JN91 91-124-C-JN91 91-124-D-JN91 91-124-E-JN91 91-124-F-JN91 91-124-G-JN91 91-124-H-JN91 91-124-I-JN91 91-127-A-JN91 91-127-B-JN91 91-127-C-JN91 91-127-D-JN91 91-127-E-JN91 91-127-F-JN91 91-127-G-JN91 Latitude Longitude Sanple Depth Water Table pH Eh (Ft.) Depth (Ft.) fflV Au ng/L As(III) As(V) As-T ug/L ug/L ug/L
Sb ug/L W ug/L Fe ag/L Mn ag/L Ge ug/L Mo ug/L Sample f 91-124-A-JN91 91-124-B-JN91 91-124-C-JN91 91-124-D-JN91 91-124-E-JN91 91-124-F-JN91 91-124-G-JN91 91-124-H-JN91 91-124-I-JN91 91-127-A-JN91 91-127-B-JN91 91-127-C-JN91 91-127-D-JN91 91-127-E-JN91 91-127-F-JN91 91-127-G-JN91 Ca K /L /L Mg /L Na /L /L N03 /L S04 F /L /L Alk. /L Si02 /L Ag ug/L Cd Co ug/L ug/L Cr ug/L Cu ug/L Pb ug/L
Zn ug/L
Cond. uS Temp. °F
Table 2. Continued Saiple f 91-158-A-JL91 91-158-C-JL91 91-158-E-JL91 91-162-A-JL91 91-162-B-JL91 91-162-C-JL91 91-162-D-JL91 91-162-E-JL91 91-162-F-JL91 91-162-G-JL91 91-162-H-JL91 91-162-I-JL91 91-163-A-JL91 91-163-B-JL91 91-163-C-JL91 91-163-D-JL91 Latitude Longitude 117 15 41 117 15 41 117 15 41 117 11 31 117 11 31 117 11 31 117 11 31 117 11 31 117 11 31 117 11 31 117 11 31 117 11 31 117 11 28 117 11 28 117 11 28 117 11 28 Saaple Depth Water Table pH (Ft.) Depth (Ft. ) Eh aV Au ag/L As(III) As(V) ug/L
ug/L
As-T ug/L Sb ug/L W ug/L Fe ag/L Mn ag/L Ge ug/L 0'.2 Mo ug/L Saaple f 91-158-A-JL91 91-158-C-JL91 91-158-E-JL91 91-162-A-JL91 91-162-B-JL91 91-162-C-JL91 91-162-D-JL91 91-162-E-JL91 91-162-F-JL91 91-162-G-JL91 91-162-H-JL91 91-162-I-JL91 91-163-A-JL91 91-163-B-JL91 91-163-C-JL91 91-163-D-JL91 Ca K Mg ig/L ag/L ag/L Na ag/L N03 ag/L ag/L S04 ag/L F ag/L
Alk. ag/L Si02 ag/L Ag ug/L Cd ug/L Co ug/L Cr ug/L Cu ug/L Pb ug/L Zn ug/L Cond. uS S80 Temp. °F
Table 2. Continued Sample f 91-163-E-JL91 91-163-F-JL91 91-163-G-JL91 91-163-H-JL91 91-163-I-JL91 91-163-J-JL91 91-169-A-JL91 91-169-B-JL91 91-169-C-JL91 91-169-D-JL91 91-169-E-JL91 91-169-F-JL91 91-340-A-DEC91 91-340-B-DEC91 91-340-C-DEC91 Latitude Longitude 117 11 28 117 11 28 117 11 28 117 11 28 117 11 28 117 11 28 117 11 53 117 11 53 117 11 53 117 11 53 117 11 53 117 11 53 117 14 58 117 14 58 117 14 58 Sample (Ft. Depth Water Table pH Eh Au ) Depth (Ft.) fflV ng/L As(III) As(V) As-T ug/L ug/L ug/L
Sb ug/L W ug/L Fe Mn /L /L Ge ug/L Mo ug/L Saiple 1 91-163-E-JL91 91-163-F-JL91 91-163-G-JL91 91-163-H-JL91 91-163-I-JL91 91-163-J-JL91 91-169-A-JL91 91-169-B-JL91 91-169-C-JL91 91-169-D-JL91 91-169-E-JL91 91-169-F-JL91 91-340-A-DEC91 91-340-B-DEC91 91-340-C-DEC91 Ca /L K /L Mg /L Na /L /L N03 /L 3*.8 S04 F /L /L Alk. g/L Si02 /L Ag Cd ug/L ug/L Co ug/L Cr ug/L Cu ug/L Pb Zn ug/L ug/L Cond. uS Temp. °F
Table 2. Continued C") Sample f 91-342-A-DEC91 91-342-B-DEC91 91-342-C-DEC91 91-342-D-DEC91 91-342-E-DEC91 91-346-A-DEC91 91-346-B-DEC91 91-346-C-DEC91 91-346-D-DEC91 91-346-E-DEC91 91-346-F-DEC91 91-346-G-DEC91 91-346-H-DEC91 92-6-A-MR92 92-6-B-HR92 92-6-C-MR92 Latitude Longitude 117 14 58 117 14 58 117 14 58 117 14 58 117 14 58 117 11 30 117 11 30 117 11 30 117 11 30 117 11 30 117 11 30 117 11 30 117 11 30 117 14 51 117 14 51 117 14 51 Sample Depth Water Table pH (Ft.) Depth (Ft.
) Eh mV
Au ng/L
As(III) As(V) ug/L
ug/L
As-T ug/L Sb ug/L W ug/L
Fe mg/L Mn mg/L Ge ug/L Mo ug/L Sample I 91-342-A-DEC91 91-342-B-DEC91 91-342-C-DEC91 91-342-D-DEC91 91-342-E-DEC91 91-346-A-DEC91 91-346-B-DEC91 91-346-C-DEC91 91-346-D-DEC91 91-346-E-DEC91 91-346-F-DEC91 91-346-G-DEC91 91-346-B-DEC91 92-6-A-MR92 92-6-B-MR92 92-6-C-MR92 Ca R Mg mg/L mg/L mg/L Na mg/L N03 mg/L mg/L S04 mg/L F mg/L
Alk. mg/L
Si02 mg/L Ag ug/L Cd ug/L Co ug/L Cr ug/L Cu ug/L
Pb ug/L Zn ug/L Cond. US Teip. °F
Table 2. Continued Sample I 92-6-D-MR92 92-6-E-MR92 92-6-F-MR92 92-11-A-MR92 92-11-B-MR92 92-11-C-MR92 92-11-D-MR92 92-11-E-MR92 92-11-F-MR92 92-11-G-MR92 92-54-A-MY92 92-54-B-MY92 92-54-C-MY92 92-54-D-MY92 92-54-E-MY92 92-54-F-MY92 Latitude Longitude 117 14 51 117 14 51 117 14 51 117 12 12 117 12 12 117 12 12 117 12 12 117 12 12 117 12 12 117 12 12 117 12 20 117 12 20 117 12 20 117 12 20 117 12 20 117 12 20 Sample Depth Water Table pH (Ft.) Depth (Ft.) Eh mV
Au ng/L As(III) As(V) As-T ug/L ug/L ug/L
Sb ug/L ug/L Fe mg/L 0,11 Mn mg/L Ge ug/L Mo ug/L Sample I 92-6-D-MR92 92-6-E-MR92 92-6-F-MR92 92-11-A-MR92 92-11-B-MR92 92-11-C-MR92 92-11-D-MR92 92-11-E-MR92 92-11-F-MR92 92-11-G-MR92 92-54-A-MY92 92-54-B-MY92 92-54-C-MY92 92-54-D-MY92 92-54-E-MY92 92-54-F-MY92 Ca K Mg mg/L mg/L mg/L Na mg/L mg/L N03 S04 mg/L mg/L F mg/L Alk. ig/L Si02 Ag /L ug/L Cd ug/L 0.*2 Co ug/L Cr ug/L Cu ug/L
Pb ug/L Zn ug/L Cond. uS Temp. °F
Table 2. Continued CO Sample 1 92-66-A-JN92 92-66-B-JN92 92-66-C-JN92 92-66-D-JN92 92-66-E-JN92 92-78-A-JN92 92-78-B-JN92 92-78-C-JN92 92-78-D-JN92 92-241-A-OCT92 92-241-B-OCT92 92-241-C-OCT92 92-241-D-OCT92 92-241-E-OCT92 92-241-F-OCT92 92-241-G-OCT92 Latitude Longitude 117 12 21 117 12 21 117 12 21 117 12 21 117 12 21 117 15 53 117 15 53 117 15 53 117 15 53 117 12 24 117 12 24 117 12 24 117 12 24 117 12 24 117 12 24 117 12 24 Sample Depth (Ft.) Water Table pH Depth (Ft.)
Eh Au mV ng/L <20 <20 As(III) As(V) As-T ug/L
ug/L ug/L
Sb ug/L W ug/L Fe mg/L Mn mg/L Ge ug/L Mo ug/L Sample 1 92-66-A-JN92 92-66-B-JN92 92-66-C-JN92 92-66-D-JN92 92-66-E-JN92 92-78-A-JN92 92-78-B-JN92 92-78-C-JN92 92-78-D-JN92 92-241-A-OCT92 92-241-B-OCT92 92-241-C-OCT92 92-241-D-OCT92 92-241-E-OCT92 92-241-F-OCT92 92-241-G-OCT92 Ca K Mg mg/L /L mg/L Na mg/L mg/L N03 S04 mg/L /L F Alk. mg/L /L Si02 Ag /L ug/L Cd Co ug/L ug/L Cr ug/L Cu ug/L
Pb ug/L Zn ug/L
Cond. uS Teip. °F
Table 2. Continued CD Sample 1 92-241-H-OCT92 92-248-A-OCT92 92-248-B-OCT92 92-248-C-OCT92 92-304-A-DEC92 92-304-B-DEC92 92-304-C-DEC92 92-304-D-DEC92 92-304-E-DEC92 92-304-F-DEC92 92-304-G-DEC92 92-304-H-DEC92 92-320-A-DEC92 92-320-B-DEC92 92-320-C-DEC92 Latitude Longitude 117 12 24 117 10 55 117 10 55 117 10 55 117 12 28 117 12 28 117 12 28 117 12 28 117 12 28 117 12 28 117 12 28 117 12 28 117 12 34 117 12 34 117 12 34 Sample (Ft. Depth Water Table pB Eh Au ) Depth (Ft.) fflV ng/L <25 <25 As(III) As(V) As-T ug/L ug/L ug/L Sb ug/L
ug/L Fe /L Mn /L Ge ug/L Mo ug/L Sample 1 92-241-H-OCT92 92-248-A-OCT92 92-248-B-OCT92 92-248-C-OCT92 92-304-A-DEC92 92-304-B-DEC92 92-304-C-DEC92 92-304-D-DEC92 92-304-E-DEC92 92-304-F-DEC92 92-304-G-DEC92 92-304-H-DEC92 92-320-A-DEC92 92-320-B-DEC92 92-320-C-DEC92 Ca ing/L K /L Mg /L Na /L /L N03 S04 F /L og/L mg/L Alk. /L
Si02 Ag /L ug/L Cd ug/L Co ug/L Cr ug/L Cu ug/L
Pb ug/L Zn ug/L Cond. uS Temp. °F
Table 2. Continued Sample f 92-320-D-DEC92 92-320-E-DEC92 92-320-F-DEC92 93-25-A-MR93 93-25-B-MR93 93-25-C-MR93 93-25-D-MR93 93-25-E-MR93 93-25-F-MR93 93-35-A-MR93 93-35-B-MR93 93-35-C-MR93 93-35-D-MR93 93-35-E-MR93 93-35-F-MR93 Latitude Longitude 117 12 34 117 12 34 117 12 34 117 13 10 117 13 10 117 13 10 117 13 10 117 13 10 117 13 10 117 13 05 117 13 05 117 13 05 117 13 05 117 13 05 117 13 05 Sample Depth Water Table pH (Ft.) Depth (Ft.
) Eh Au loV ng/L
As(III) As(V) ug/L ug/L
As-T ug/L
Sb ug/L W ug/L
Fe ng/L Mn mg/L Ge ug/L Mo ug/L Sample 92-320-D-DEC92 92-320-E-DEC92 92-320-F-DEC92 93-25-A-MR93 93-25-B-MR93 93-25-C-MR93 93-25-D-MR93 93-25-E-MR93 93-25-F-MR93 93-35-A-MR93 93-35-B-MR93 93-35-C-MR93 93-35-D-MR93 93-35-E-MR93 93-35-F-MR93 Ca K Mg mg/L ig/L ng/L Na mg/L N03 mg/L log/L
S04 ng/L
F Alk. nig/L ig/L
Si02 ng/L Ag Cd ug/L ug/L Co ug/L Cr ug/L Cu ug/L
Pb ug/L Zn ug/L Cond. uS Temp. °F
Table 2. Continued ro Sample f 93-37-A-MR93 93-37-B-MR93 93-37-C-MR93 93-37-D-MR93 93-37-E-MR93 93-40-A-MR93 93-40-B-MR93 93-40-C-MR93 93-40-D-MR93 93-42-A-MR93 93-42-B-MR93 93-42-C-MR93 93-43-A-MR93 93-43-B-MR93 93-43-C-MR93 Latitude Longitude Sample Depth Hater Table pH 117 13 00 117 13 00 117 13 00 117 13 00 117 13 00 117 12 55 117 12 55 117 12 55 117 12 55 117 12 57 117 12 57 117 12 57 117 13 04 117 13 04 117 13 04 (Ft.) Depth (Ft,
Eh Au As(III) As(V) As-T .) mV ng/L ug/L ug/L ug/L
Sb ug/L S ug/L
Fe /L Mn /L Ge ug/L Mo ug/L Sample f 93-37-A-MR93 93-37-B-MR93 93-37-C-MR93 93-37-D-MR93 93-37-E-MR93 93-40-A-MR93 93-40-B-MR93 93-40-C-MR93 93-40-D-MR93 93-42-A-MR93 93-42-B-HR93 93-42-C-MR93 93-43-A-MR93 93-43-B-MR93 93-43-C-MR93 Ca K Mg /L /L ig/L Na /L N03 /L /L S04 /L F Alk. Si02 /L /L ig/L
Ag Cd ug/L ug/L Co ug/L Cr ug/L Cu ug/L
Pb ug/L Zn ug/L
Cond. PS Temp. 'F
Table 2. Continued ro ro Sample f 93-44-A-MR93 93-44-B-MR93 93-44-C-MR93 93-44-D-MR93 93-46-A-MR93 93-46-B-MR93 93-46-C-MR93 93-46-D-MR93 93-48-A-MR93 93-48-B-MR93 93-48-C-MR93 93-49-A-MR93 93-49-B-MR93 93-49-C-KR93 Latitude Longitude 117 13 10 117 13 10 117 13 10 117 13 10 117 13 31 117 13 31 117 13 31 117 13 31 117 13 27 117 13 27 117 13 27 117 13 19 117 13 19 117 13 19 Sample Depth Hater Table pH (Ft.) Depth (Ft.)
Eh Au As(III) As(V) As-T fflV ng/L ug/L ug/L ug/L
Sb W ug/L ug/L
Fe /L Mn /L Ge Ug/L Mo lig/L Sample 93-44-A-MR93 93-44-B-MR93 93-44-C-MR93 93-44-D-MR93 93-46-A-MR93 93-46-B-MR93 93-46-C-MR93 93-46-D-MR93 93-48-A-MR93 93-48-B-MR93 93-48-C-MR93 93-49-A-MR93 93-49-B-MR93 93-49-C-MR93 Ca K Mg /L /L mg/L Na /L N03 /L /L S04 /L F Alk. Si02 Ag /L /L /L ug/L Cd ng/L Co ug/L Cr ug/L Cu ug/L
Pb ug/L Zn ug/L
Cond. us Teip. °F
Table 2. Continued CO CO Sample f 93-54-A-MY93 93-54-B-MY93 93-54-C-MY93 93-54-D-MY93 93-54-E-MY93 93-54-F-MY93 93-54-G-MY93 93-54-H-MY93 93-82-A-MY93 93-82-B-MY93 93-82-C-MY93 93-82-D-MY93 93-82-E-MY93 93-83-A-MY93 93-83-B-MY93 93-83-C-MY93 Latitude Longitude 117 11 36 117 11 36 117 11 36 117 11 36 117 11 36 117 11 36 117 11 36 117 11 36 117 11 43 117 11 43 117 11 43 117 11 43 117 11 43 117 11 52 117 11 52 117 11 52 Sample Depth (Ft.) Water Table pH Depth (Ft.
) 8,3 Eh aV
Au ng/L
As(III) As(V) As-T ug/L
ug/L ug/L Sb ug/L W ug/L Fe ag/L Mn ig/L Ge ug/L Mo ug/L Sample 93-54-A-MY93 93-54-B-MY93 93-54-C-MY93 93-54-D-MY93 93-54-E-MY93 93-54-F-MY93 93-54-G-MY93 93-54-H-MY93 93-82-A-MY93 93-82-B-MY93 93-82-C-MY93 93-82-D-MY93 93-82-E-MY93 93-83-A-MY93 93-83-B-MY93 93-83-C-MY93 Ca K Hg ig/L ig/L ng/L Na ig/L ag/L N03 ig/L 2.*0 S04 ag/L F ig/L Alk. ig/L
Si02 ig/L Ag ug/L Cd Co ug/L ug/L Cr ug/L Cu ug/L
Pb ug/L Zn ug/L
Cond. us Teip. °P
Table 2. Continued to Sample f 93-83-D-MY93 93-83-E-MY93 93-84-A-JN93 93-84-B-JN93 93-84-C-JN93 93-84-D-JN93 93-84-E-JN93 93-85-A-JN93 93-85-B-JN93 93-85-C-JN93 93-85-D-JN93 93-85-E-JN93 Latitude Longitude 117 11 52 117 11 52 117 11 53 117 11 53 117 11 53 117 11 53 117 11 53 117 12 40 117 12 40 117 12 40 117 12 40 117 12 40 Sample Depth (Ft.) Water Table pH Depth (Ft.) Eh Au mV ng/L
<50 <50 <50
As(III) As(V) ug/L
ug/L
As-T ug/L
Sb ug/L W ug/L Fe ng/L Mn mg/L Ge ug/L Mo ug/L Sample f 93-83-D-MY93 93-83-E-MY93 93-84-A-JN93 93-84-B-JN93 93-84-C-JN93 93-84-D-JN93 93-84-E-JN93 93-85-A-JN93 93-85-B-JN93 93-85-C-JN93 93-85-D-JN93 93-85-E-JN93 Ca K Mg mg/L mg/L mg/L Na mg/L mg/L N03 S04 mg/L mg/L F Alk. mg/L mg/L Si02 Ag mg/L ug/L Cd ug/L Co ug/L Cr ug/L Cu ug/L
Pb ug/L Zn ug/L
Cond. uS Temp. 'F
Table 2. Continued ro Sample i 93-94-A-MY93 93-94-B-MY93 93-94-C-MY93 93-94-D-MY93 93-95-A-MY93 93-95-B-MY93 93-95-C-JN93 93-95-D-JN93 93-118-A-JN93 93-118-B-JN93 93-118-C-JN93 93-118-D-JN93 93-118-E-JN93 93-272-A-SEP93 93-272-B-SEP93 Latitude Longitude 117 14 31 117 14 31 117 14 31 117 14 31 117 14 29 117 14 29 117 14 29 117 14 29 117 12 47 117 12 47 117 12 47 117 12 47 117 12 47 117 12 57 117 12 57 Sample Depth Hater Table pH (Ft.) Depth (Ft.)
Eh Au mV ng/L As(III) As(V) As-T ug/L ug/L ug/L
Sb ug/L 3,1 H ug/L
Fe /L Mn /L Ge ug/L Mo ug/L Sample i 93-94-A-MY93 93-94-B-MY93 93-94-C-MY93 93-94-D-MY93 93-95-A-MY93 93-95-B-MY93 93-95-C-JN93 93-95-D-JN93 93-118-A-JN93 93-118-B-JN93 93-118-C-JN93 93-118-D-JN93 93-118-E-JN93 93-272-A-SEP93 93-272-B-SEP93 Ca K Ng /L /L /L Na /L /L N03 /L S04 /L F Alk. /L /L Si02 /L Ag Cd ug/L ug/L Co ug/L Cr ug/L Cu ug/L
Pb ug/L Zn ug/L
Cond. uS Temp. °F
Table 2. Continued Sanple 1 GET-2-JN89 GET-3-JN89 GET-4-JN89 GET-5-OCT89 SUM-1-JN89 Latitude Longitude 117 15 02 117 15 17 117 15 47 117 15 57 117 15 14 Sanple Depth (Ft.) CREEK CREEK CREEK CREEK CREEK Hater Table pH Depth (Ft.) Eh nV Au ng/L
As(III) As(V) ug/L ug/L
As-T ug/L Sb W ug/L ug/L Fe ig/L Mn ng/L Ge ug/L Mo ug/L Sanple f GET-2-JN89 GET-3-JN89 GET-4-JN89 GET-5-OCT89 SUM-1-JN89 Ca /L s K Mg jg/L /L Na /L ng/L N03 S04 mg/L ng/L F ng/L Alk. ng/L Si02 Ag Cd ng/L ug/L ug/L Co ug/L Cr Cu ug/L ug/L Pb ug/L Zn ug/L Cond. US Tenp. °F