f SUMMARY AND TECHNICAL REVIEW OF SUPPORTING
& LITERATURE FOR THE 1985 REPORT TO CONGRESS ON WASTES
FROM THE EXTRACTION AND BENEFICIATION OF METALLIC
ORES, PHOSPHATE ROCK, ASBESTOS, OVERBURDEN FROM
URANIUM MINING, AND OIL SHALE
October 1993
U.S. Environmental Protection Agency
Office of Solid Waste
Mining Waste Section
Washington D.C. 20460
information Resources Center
US EPA (3404)
401 M Street, SW
Washington, DC 20460
22
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Headquarters Library
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This paper presents a technical review of the sampling and analytical data cited in the 1985 Report to
Congress on Wastes from the Extraction and Beneficiation of Metallic Ore. Phosphate Rock.
Asbestos. Overburden from Uranium Mining and Oil Shale (RTC I). The sampling and analytical
results cited in RTC I come from three sources.
• Evaluation of Management Practices for Mine Solid Waste Storage. Disposal and
Treatment. PEDCo; 1984.
• Hazardous Waste Identification and Listing Support: Mining Waste Studv. ERCO'
1984.
• Characterization of Wastewater and Solid Wastes Generated in Selected Ore Mining
Subcateeories /Sb. Hg. Al. V. W. Ni. TlV. Harty and Terlecky; 1981.
For each source, the following sections present a review of the sampling and analysis methodologies.
as well as describing the data that were collected. The specific analytical results from each source
are provided in the attached tables.
1. Source #1: Evaluation of Management Practices for Mine Solid Waste Storage, Disposal
and Treatment, PEDCo 1984.
This three-volume document includes results for sampling and analysis conducted at 65 mining sites
in the following industry segments: Active Sites - Copper; Gold; Lead; Zinc/Silver; Lead/Zinc;
Zinc; Molybdenum; Phosphate; Iron/Taconite; Silver/Gold; Silver/Lead; Uranium; and Tungsten:
Inactive Sites - Red Iron Ore; Copper; Gold; Lead; Zinc; Silver and Uranium.
The information gathered during the sampling and analysis is presented in three volumes consisting
of:
Volume 1 - Characterization of Mining Wastes
Volume 2 • Environmental Analysis Summary - Case Study Findings, Conclusions, and
Implications on Related Mining Districts
Volume 3 - Evaluation of the Effectiveness of Waste Management Practices
This review focuses on Volume 1, which contains the results of sampling and analysis efforts.
I.I. Sampling Methodology and Technical Review
The document contains a brief description of techniques used to collect samples during the
Presurvey.1 Samples were taken from three areas: waste piles, tailing ponds, and mine water ponds.
'More detailed descriptions of general sampling methods are contained in the Field and Laboratory
Sampling and Analysis Manual for the Presurvey of Solid Waste Management Practices in the Mining
Industry, fEDCo 1981. a document developed specifically for the Study. This document was not
reviewed as part of this effort.
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I.I.A. Waste Pile Sampling
Composite samples, consisting of 5-10 subsamples totaling approximately 10 pounds, were collected
from each waste pile, leach pile, and low grade ore storage area sampled. The samples were
collected by transecting the waste pile from toe-to-toe and collecting subsamples at depths of several
inches to one foot from the surface. Large material was reduced to a more manageable size using a
crack hammer.
Sampling errors can be introduced through the collection of too small a sample in relation to the
particle sizes in a waste rock pile. It does not appear that the study took into account the panicle
size distribution characteristics of the material being sampled or the overall weight or mass of the
bulk material to select sample and subsampte size required for adequate characterization. The
method used to sample waste piles cannot adequately represent the mass being characterized or
provide an acceptable degree of statistical precision for samples with coarse grain size.
In characterization of raw uncleaned coal, ASTM Method 2234 provides guidelines for collection of
representative samples from coal piles. For stationary sampling of coal piles, equal weight
increments should be collected. The following table shows the required number of increments and
minimum weight of each increment for various particle sizes to obtain representative samples:
Table A
Minimum number of increments
Minimum weight of increments, Ibs.
Particle Size
5/8 in. 2 in. 6 in.
35 35 35
2 6 15
Table A is used for quantities up to approximately 1000 tons. For quantities over 1000 tons,
separate gross samples can be taken for each 1000-ton lot or one gross sample representing the total
tonnage can be collected by increasing the number of increments taken using the following formula:
N,
Total lot size (tons)
1000 tons
'
Where:
N, = Number of increments shown in Table A
N:= Number of increments required
In addition, considerations regarding the age or weathering of waste piles were not discussed. It is
likely mat sampling performed near the surface of waste piles exposed to precipitation for a
significant period of time represents characteristics of weathered material and does not indicate the
overall characteristics of the entire mass. Solid waste samples used for EP toxicity testing may have
been previously leached by rainwater, etc., and may not accurately reflect the potential for acid
generation and release of metals.
1.I.A.I. Subsampling and Preparation Procedures
The PEDCo report does not identify or describe procedures to homogenize, split and prepare
(crushing, grinding, screening) the 10-pound composite samples prior to additional preparation steps
required for each analytical method.
. -2-
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1;
\
Representative splitting of samples can be achieved through fractional selection or channelling,
coning and quartering, and riffling. Where grinding and screening are used to prepare samples.
material not able to pass through screens must be weighed and assayed separately or the true
characteristics of the material cannot be determined.
l.I.B. Tailings Ponds and Mine Water Pond Sampling
Liquid samples from tailings ponds and mine water pumpout ponds were obtained by compositing 5-
10 subsamples taken along a transect of the pond or from the pond perimeter. Tailings pond influent
samples were taken directly from influent streams or in the pond as close as possible to the influent.
All subsamples were grab samples.
Characteristics of process wastewater streams can be highly variable due to changes in feedstock and
process conditions. For tailings ponds and other ponds used for settling suspended solids in
wastewater, many factors can affect the suspended solids settling characteristics including lime and
flocculent addition rates, pond retention time, and the frequency of pond dredging and cleaning
operations.
The ability of a one-time grab sampling effort to represent "normal" characteristics of the
wastewaters included in this effort is questionable. Grab samples are representative of the conditions
only at the time of sampling. PEDCo did not look at the variability of wastewater streams through
collection of multiple samples at different times or attempt to smooth possible fluctuations in
wastewater characteristics by collecting time-composite samples.
1.1.C. Field Quality Assurance/Quality Control
The PEDCo report does not describe or summarize procedures used for field QA/QC such as the
frequency of duplicate sampling and assessing field precision and accuracy. Several duplicate
samples were collected in the field, however, results of replicate sampling are not presented. It
appears that sample results were presented as the average of the individual results where duplicate
samples were collected.
I.II. Analytical Methodologies and Testing
Total constituent analyses were performed on all solid and liquid samples. Only solid samples were
subjected to EP toxicity testing and a modified EP toxictty procedure using deionized water as the
extraction medium. No leach tests were performed on liquid samples.
l.II.A. Total Analyses
The reference cited for total metals analysis, Federal Register, December 3, 1979, utilizes a nitric
acid digestion procedure as a preparation step for dissolution of metals. This procedure may not be
rigorous enough to allow complete release and dissolution of all metal analytes of interest for this
study. In particular, solid wastes containing silicate matrices are not amenable to this treatment and
require additional digestion with hydrofluoric (HF) acid or perchloric acid (HCIOJ and possibly a
salt fusion step to ensure that a complete total constituent analysis is obtained.
-3-
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l.III. Data Summary
RTC I focused on whether the targeted wastes exhibit hazardous waste characteristics. As a result.
the PEDCo report data included in RTC I were the results of EP toxicity testing for solid samples.
The attached tables summarize the results of both EP toxicity and total constituent analyses.
Specifically, Table 1 identifies applicable water quality standards for analyzed constituents. The
results of EP toxicity analysis of liquid samples are presented in Table 2. Table 3 presents data for
total constituent analysis of liquid samples. Table 4 presents the PEDCo data for total constituents of
solid samples. Tables 2 and 3 also include comparisons to the standards listed in Table I. In
performing these comparisons, we have used the following scale which was also used in RTC I:
greater than 100X standard = high; 20-100X standard = elevated; and 10-20X standard = slightly
elevated. It should be noted that 100X standard for EP toxic metals is equivalent to the EP toxicity
criteria. Since the standards provided in Table 1 are generally only applicable to Itquid/leachate
samples, the results of total constituent analyses for solid samples (Table 4) were not compared to the
standards.
The following sections provide further comments on the PEDCo analytical data.
1.III.A. EP Toxicity Analyses
The comments below apply to the results of EP toxicity analyses of solid samples as presented in
Table 2 and how these data were presented in RTC I.
1. Two Inactive Spent Oxide Liquor Pond Residue samples from the Copper Districts
showed elevated levels of of EP toxic metals (1 sample for chromium and 1 sample
for selenium), not one sample as indicated in Table 4-6 in RTC I.
2. A total of four solid waste samples from the Gold/Silver industry segment exhibited
the characteristic of EP Toxicity and six additional samples showed elevated levels of
EP toxic metals. Table 4-6 of RTC I lists seven EP toxic and seven samples with
elevated levels.
3. A total of ten samples from the Lead/Zinc mines segment showed elevated levels of
EP toxic metals. Table 4-6 of RTC I lists nine.
4. Of the 214 samples that were subjected to a modified EP toxicity test in which
deionized water, rather than acetic water, was used as the extracting medium, there
were eight samples with elevated levels of EP toxic metals. One inactive spent oxide
liquor pond residue from the Southwestern Copper District had an elevated level of
chromium. One inactive spent oxide liquor pond residue from the Other Copper
District also had an elevated level of selenium. In the Eastern Lead/Zinc District
mere was an elevated level of mercury in one sample of settleable solids from an
inactive tailings pond. In the Nevada Gold/Silver District there were two occurrences
of elevated levels of mercury - in an inactive heap leach material, and in the settled
solids of an inactive tailings pond. In the other Gold/Silver District, elevated levels
of cadmium and lead were found in an inactive tailings pond settled solids. There
was also an elevated level of selenium in an active tailings pond settled solids.
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l.III.B. Total Constituent Analyses
The results of total constituent analyses for liquid samples (pH. metals, and radiological) and solid
samples (metals) are presented in Tables 3 and 4. For each sector sampled the results of
comparisons of total constituent analysis of liquid samples are summarized below. As stated above.
the solids data were not compared to standards because the standards are intended for comparison to
liquid/1 eachate samples.
1. Uranium Mines - No elevated levels of any parameters were found in liquid samples.
2. Molybdenum Mines - One of three untreated mine water samples contained elevated
levels of cadmium and selenium and a high amount of suspended solids, 1060 mg/l.
This sample also had a pH of 2.97.
3.. Iron/Taconite Mines - No elevated levels of any parameters were found in liquid
samples.
4. Gold/Silver Mines - The two tailings pond liquid samples collected from the Nevada
Gold/Silver District contained high levels of mercury. One of these samples also
contained elevated levels of arsenic and chromium, while the other sample contained
elevated levels of selenium. A third sample contained high levels of selenium.
Suspended solids contents for the samples were 8716, 101, and 36 mg/l, respectively.
5. Lead/Zinc Mines - The only mine water pond sample collected from the Western
Lead/Zinc District had a high level of lead but also contained an appreciable amount
of suspended solids, 3227 mg/l.
6. Phosphate Mines - One of twelve tailings pond liquid samples showed elevated levels
of selenium. This sample was collected from a single mine in the Idaho Phosphate
District and contained 47 mg/l total suspended solids.
7. Copper Mines - Two of six tailings pond liquid samples collected from the Southwest
Copper District indicated elevated levels of selenium. One sample had a slightly high
suspended solids level, 78 mg/l, while the other was low at 20.5 mg/l. One of three
additional tailings pond liquid samples collected from the Other Copper District
contained high levels of cadmium and very little (IS mg/l) suspended material.
All four heap leach liquor samples collected from both the Southwest and Other
Copper Districts bad high levels of selenium. Two of the leach liquors were
pregnant solutions and contained virtually no suspended solids. The remaining two
leach liquors were spent solutions and contained medium levels of suspended solids,
135 and 380 mg/l. Both pregnant leach liquors contained high levels of cadmium
and elevated levels of arsenic, and one sample showed elevated levels of lead.
Elevated levels of arsenic, cadmium, lead, and chromium were found at least once in
the spent leach liquor samples.
Of the remaining liquid waste samples, cadmium was elevated in one of two
untreated mine water samples and in one of two mine water pond samples taken in
the Other Copper District. In addition, selenium was elevated in one of two
mill/plant wastewater samples taken from the Other Copper District.
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2. Source 12: Hazardous Waste Identification and Listing Support:
Mining Waste Study, ERCO 1984.
This document contains information on sampling and analysis conducted at 27 mine sites including
the following industry segments: Uranium; Asbestos; Lead/Zinc; Phosphate; Copper; Gold/Silver;
Miscellaneous (including Beryllium, Molybdenum, Iron/Taconite, Rare Earths, and
Zirconium/Titanium). The effort was designed to address industry segments not surveyed (e.g.
Asbestos and Beryllium) under the PEDCo study and to collect supplemental information on specific
sectors (e.g., Copper).
All solid/slurry samples were analyzed for total metals and EP toxic metals. Solid samples were not
tested for potential acidity.
AH liquid samples were analyzed for total miscellaneous parameters (pH, acidity, alkalinity.
conductivity, total suspended solids, total dissolved solids, total organic carbon) but were not
analyzed for total metals. Selected liquid samples were also analyzed for total and amenable cyanide
(segments: Lead, Copper, Gold, Molybdenum), asbestos, and radiological parameters - gross alpha
and beta radiation and Radium-226 (segments: Uranium, Phosphate, Zirconium/Titanium. Beryllium,
Rare Earths). The liquid samples were subjected to the EP Toxicity test and the leachate was
analyzed for metals and anions.
2.1. Sampling Methodology and Technical Review
No complete description of sampling methodologies employed for the study is presented. The data
tables for individual sites do not describe the specific types of wastes sampled but rather, "generic"
descriptions of "solid and liquid" are applied.
Since PEDCo performed the sampling phase of the study, it seems reasonable to assume for this
review that similar procedures described previously for the Presurvey activity were used and the
same concerns apply.
2.I.A. Field Quality Assurance/Quality Control
The ERCO report does not describe or summarize procedures used for field QA/QC including the
frequency of duplicate sampling. Analytical results for several duplicate samples were presented in
the report, however, a summary of precision and accuracy for the effort was not provided.
2.II. Analytical Methodologies and Testing
Table 4 of the ERCO report lists analytical methods used for sample preparation and analysis. The
preparation method listed for some metals (Al, Ba. Ca, Cr, Co, Cu, Fe, Mg, Mn, Mo, Ni, Ag, Na.
V, and Zn) is not a preparation method but an analytical method for metals analysis by Inductive
Coupled Plasma (ICP). The actual preparation method utilized is not specified.
The digestion procedures listed for Sb, As, Cd, Pb, K, Se, and Tl use a combination of hydrogen
peroxide, nitric and/or hydrochloric acid to solubilize metals contained in the waste matrix. None of
the procedures are applicable to the determination of Sb. The digestion procedure listed for As and
Se, Method 3020, is not applicable to these elements (EPA SW-846 specifies Method 3050). In
addition, it is not clear from the table presented which digestion procedures were applied to
individual waste matrices, solid, slurry or EP Toxicity extract.
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2.III. Data Summary
Data for EP toxiciry testing of liquid and solid samples were included in RTC I. despite the fact that
the EP toxicity test is not appropriate for liquid samples. The EP toxicity data, along with
comparisons to the standards in Table !, are presented in Tables 5 and 6. The results of the total
analyses for solid samples, which were not included in RTC I, are summarized by industry sector in
Table 7. Solid samples were not compared to the standards in Table 1 because, as stated above, the
standards are generally only appropriate for liquid/leachate data. The only liquid sampling data not
included in RTC I were results of radiological (Ra-226) and pH analyses. These data are presented
in Table 8, along with a comparison'of the Ra-226 levels with the applicable maximum contaminant
level for community water systems (from Table 1).
-3. Source 13: Characterization of Wastewater and Solid Wastes Generated in Selected Ore
Mining Subcategories (Sb, Kg, Al, V, W, Ni, Tl), David M. Harty and P. Michael
Terlecky, Frontier Technical Associates, Inc., 1981.
This document contains analytical results for samples collected from seven mining industry
subcategories; antimony, mercury, vanadium, aluminum, nickel, tungsten, and titanium. The data
were collected to support CWA determinations of Best Available Technology (BAT) for sectors in
the Ore Mining and Dressing Category. This sampling effort was designed to specifically focus on
sectors that had little recent sampling data available, and to develop baseline data on the
characteristics of solid wastes generated at these facilities.
The contractor conducted one-day sampling efforts at six facilities white one facility was sampled by
company personnel. All other available data for these facilities were also compiled. The data
consisted of water quality discharge data including discharge monitoring reports and available solid
waste data. Samples of solid wastes collected from the facilities were taken from mine wastes
including mine water treatment pond solids, low grade ore, tailings, tailings pond settled solids
(sands and slimes), ore, slag and calcine, mill wastewater pond settled solids, leached tailings.
ferrosilicon dust (one facility), and caustic milt waste. Samples of water and wastewater were
collected from final discharge points, treated recycle water, welt water (make-up or process water).
mill water, mine water, acid mine drainage, slag granulation water, and intermediate wastewater
treatment streams.
3.1. Sampling Methodology and Technical Review
All water and wastewater samples collected were grab samples. It was believed that due to the large
pond sizes and long residence times, the difference between results of composite samples and grab
samples would be minimal. This difference cannot be quantified or thoroughly evaluated as no
comparison data were obtained. Samples were collected from high turbulence areas in the middle of
streams to minimize solids separation. Where low water levels or "no discharge" systems were
encountered, samples were collected as far as possible from pond influents.
Solid waste sampling was conducted using practices outlined in the Field and laboratory Sampling
and Analysis Manual for, the Presurvev of Solid Waste Management Practices in the Mining Industry.
PEDCo 1981. Dry waste piles of uniform panicle size were sampled by taking subsamples at points
equidistant across the pile and compositing the subsamples. For piles having variable size
distribution, composite samples were obtained along the banks of the pile. Solid waste samples from
tailings and mine/mill wastewater ponds were either collected directly from the influent to the pond.
where high solids content (40%) occurred, or along the banks of the pond. Samples were also
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collected directly from the pond bottoms by taking equal size samples from four equidistant points
between pond influents and effluents. These samples were mostly collected from the pond shore
using an extended pole.
The same discussion of representative sampling methods described for the PEDCo study (Source #1)
also applies to this sampling effort. It should be noted that the report states that if the initial
sampling found wastes that exceeded EP Toxicity criteria, additional, more extensive sampling of
waste piles may have been warranted. In addition, no sample splitting or subsampling procedures
are described.
3.1.A. Field Quality Assurance/Quality Control
The Harty and Terlecky report does not describe or summarize procedures used for field QA/'QC
including the frequency of duplicate sampling.
3.II. Analytical Methodology
Samples collected were analyzed using procedures found in Methods for Chemical Analysis of Water
and Wastes, EPA-600/4-79-020. Liquid waste samples were analyzed for total and dissolved metals
(Some samples analyses using inductively coupled plasma method). EP toxicity testing was
performed on solid waste samples using the procedure found in 40 CFR Pan 261, Appendix A.
Samples for one facility (Tungsten) were also analyzed using Proton Induced X-Ray Emission
(PIXE). No leaching procedure testing was applied to liquid samples and no radiological analysis
was performed Pn anv solid or liquid samples.
The Harty and Terlecky report does not identity or describe procedures to homogenize, split and
prepare (crushing, grinding, screening) the 10-pound composite solid waste samples prior to
additional preparation steps required for each analytical method. Also, the actual sample preparation
methods applied prior to performing metals analysis are not described.
3.III. Data Summary
The only data from this sampling effort included in RTC I were the results of EP Toxicity analyses
on solid waste samples. These data are summarized in Table 9. The results of total and dissolved
metals analyses on liquid samples, along with comparisons to the applicable standards, are
summarized in Table 10. The complete analytical results are provided for total and dissolved metals
analyses in detail in Table 11.
Comparing die results of dissolved metals analyses (which better measure constituent mobility tor
liquid samples man the EP Toxicity procedure) to the applicable standards, two samples from the
Mercury Subcategory, mill effluent and tailings pond recycle, show elevated levels of both arsenic
and mercury.
-8-
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TABLE 1
APPLICABLE STANDARDS
Page 1
Constituent
Ag
As
Ba
Be
Cd
Cr
Cu
Fe
Hg
Mo
Ni
Pb
Sb
Se •
Tl
Zn
Ra-226, pCi/I
Applicable1
Standard
(in ppm)
0.05
0.05
1.0
0.01J
0.01
0.05
1.03*
0.3*
0.002
0.051
1.83
0.05
9.0
0.01
1.4
0.32'
5.01
Slightly Elevated
10X Standard
(in ppm)
0.5
0.5
10.0
0.1
0.1
0.5
10.0
3.0
0.02
0.5
18
0.5
90
0.1
14
3.2
50
Elevated
20x Standard
(in ppm)
1.0
1.0
20.0
0.2
0.2
1.0
20.0
6.0
0.04
1
36
1.0
180
0.2
28
6.4
100
High
100X Standard1
(in DDtn)
5.0
5.0
100.0
1.0
1.0
5.0
100.0
30.0
0.2
5
180
5.0
900
1.0
140
32
500
'Unless otherwise noted, represents National Interim Primary Drinking Water Standard (MCL)
Tor Ag, As, Ba, Cd, Cr, Hg, Pb and Se, 100 x Equivalent to the EP Toxicity Level
'USEPA Quality Criteria for Water, Hardness = 0-100 mg/1
'Maximum Contaminant Level for Community Water Systems (MCL)
'National Secondary Maximum Contaminant Level (MCL)
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TABLE 4
SUMMARY OF PEDCO DATA FOR
TOTAL CONSTITUENT .ANALYSIS OF SOLID SAMPLES
Page 1
Sector
Uranium
Total # of Samples is
56
Molybdenum
Total # of Samples is
14
SOLID SAMPLING
v
Constituent
Ag
As
Ba
Be
Cd
Cr
Cu
Fe
Hg
Ma
Ni
Pb
Sb
Se
Tl
Zn
Ag
As
Ba
Be
Cd
Cr .
Cu
Fe
Hg
Mn
Nf
Pb
Sb
Se
Tl
Zn
# of Samples
Delected in
N/A
50
54
23
1
54
16
54
29
41
11
27
1
44
5
20
0
0
14
9
0
14
11
14
7
10
9
9
0
0
1
9
Concentration
Range tin ppm.
unless otherwise
noted)
N/A
0.025 - 59.8
0.18 - 2.S9
1.05 - 9.39
250.66
5.28 - 211.84
0.65 - 125.42
3,244.2 - 93,908.1
0.01 i 1.43
0.004 - 2.0
0.005 • 0.10
103.2 - 291
0.32
0.30 - 126
0.091 - 0.30
0.003 - 0.046
—
—
11.96 - 932
1.62 - 867
—
5.63 - 125.77
6.46 - 155.5
12,910 - 34,732
0.01 - 0.07
0.05 - 0.77
0.003 - 0.36
117.78 - 2SO
—
—
0.091
0.009 - 0.16
-------
TABLE 4 (Continued)
SUMMARY OF PEDOO DATA FOR
TOTAL CONSTTTUEiNT ANALYSIS OF SOLID SAMPLES
Page 2
Sector
Iron/Taconite
Total # of Samples is
32
Gold/Silver
Total # of Samples is
33
,
Constituent
Ag
As
Ba
Be
Cd
Cr
Cu
Fe
Hg
Mn
Ni
Pb
Sb
Se
Tl
Zn
Ag
As
Ba
Be
Cd
Cr
Cu
Fe
Hg
Mn
Ni
Pb
Sb
Se
Tl
Zn
SOLID SAMPLING
# of Samples
Detected in
N/A
28
31
4
0
30
0
30
25
15
9
7
2
29
1
14
0
33
31
10
0
33
22
32
31
18
13
20
4
27
0
11
Concentration
Range (in ppm.
unless otherwise
noted)
N/A I
2.59 - 97.8
3.85 - 720
1.01 - 1.28
—
12.94 - 405.5
~
273,648
0.01 - 0.815
0.008 - 0.99
0.004 - 0.026
112.5 - 144.3
0.072 - 0.15
2.03 - 32.45 U
0.091 1
0.007 - 0.024 If
jj
0.7859 - 1,900
33.5 - 1.269
1.01 - 2.79
"
1.48 - 117.46
4.06 -- 281.97
8,772 - 114,540
0.02 - 5.32
0.003 - 10.8
0.004 - 0.26
106 - 15.506
0.04 - 0.13 1
0.60 - 21.7
«
0.004 - 41.0
-------
TABLE 4 (Continued)
SUMMARY OF PEDCO DATA FOR
TOTAL CONSTITUENT ANALYSIS OF SOLID SAMPLES
Page 3
Sector
Lead/ Zinc
Total # of Samples is
34
Phosphate
Total # of Samples is
63
SOLID SAMPLING
Constituent
Ag
As
Ba
Be
Cd
Cr
Cu
Fe
Hg
Mn
Ni
Pb
Sb
Se
TI
Zn
Ag
As
Ba
Be
Cd
Cr
Cu
Fe
Mn
Ni
Hg
Pb
Sb
Se
Tl
Zn
# of Samples
Detected in
0
33
33
2
6
33
25
32
19
23
25
23
1
24
0
25
0
42
60
14
17
62
45
62
23
15
52
13
2
48
0
20
Concentration
Range (in ppro.
unless otherwise
noted)
,,
0.27 - 132
7.29 - -100
1.2 - 1.26
10.03 - 25.11
4.92 - 102.92
0.78 - 1,327.3
1.108.3 - 118,867
0.02- 0.75
0.004 - 3.3
0.007 - 0.3
109.67 - 17,523
0.087
0.27 - 15.9
--
0.013 - 44
..
2.5 - 102.3
4.8 - 545.0
1.07 - 2.23
13.59 - 79.5
4.06 - 2,104.0
0.77 • 1,124
9.05 - 50,634.0
0.002 - 0.50
0.005 - 0.088
0.01 - 1.65
102.0 - 142.8
0.032 - 034
0.41 - 248
«
0.006 - 0.18
-------
TABLE 4 (Continued)
SUMMARY OF PEDCO DATA FOR
TOTAL CONSTITUENT ANALYSIS OF SOLID SAMPLES
Page 4
I SOLID SAMPLING
Sector
Copper
Total # of Samples is
72
Constituent
Ag
As
Ba
Be
Cd
Cr
Cu
Fe
Hg
Ma
Ni
Pb
Sb
Se
Tl
Zn
# of Samples
Detected in
0
63
70
45
T
72
72
72
57
50
38
46
7
48
2
42
Concentration
Range (in ppm,
unless otherwise
noted)
—
0.83 - 339
16 - 897
1.02 - i:
10.4 - 1103
7.53 - 424.8
2.02 - 3,146.0
2,630 - 151.928.0
0.01 - 1.28
0.005 - 34.0
0.003 - 1.03
102 - 962.4
0.042 - 0.55
1.5 - 30.2
0.22 - 0.28
0.006 - 16.44 j
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TABLE 7
SUMMARY OF ERCO DATA FOR
TOTAL CONSTITUENT ANALYSIS OF SOLID SAMPLES
Page I
Sector
Uranium
Toul # of Samples is 10
Lead
Total f of Samples is 3
Asbestos
Toul t> of Samples is 5
SOLID SAMPLING
Constituent
Ag
As
Ba
Be
Cd
Cr
x Cu
Fe
Hg
Mn
Ni
Pb
Sb
Se
Tl
Za
Ag
As
Ba
Be
Cd
Cr
Cu
. Fe
Hg
Mn
Ni
Pb
Sb
Se
Tl
ID'
Ag
As
Ba
Be
Cd
Cr
Cu
Fe
Hg
Mo
Ni
Pb
Sb
Se
Tl
Zn
# of Samples
Detected in
0
10
to
10
8
5
7
10
7
10
10
10
0
5
0
10
0
3
3
3
3
0
3
3
0
3
3
3
3
0
0
3
0
4
5
0
0
5
5
5
5
5
5
•4
0
0
0
5
Concentration
Range (in ppm,
unless otherwise
noted)
. 7.2-35
19 - 190
0.25 - 0.92
3.400 - 48.000
2.7 - 8.5
3.7-4.9
4,000 - 10,000
O.OOS-0.18
40-440
3.8-7.4
4.2 - 15
..
14-62
«
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38 -51
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..
530- 1,000
22.000 - 27.000
1,800-2,100
110-240
11.000- 17.000
0.89 - 0.99
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1.2- 1.9
1.7-21
—
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5.4-37
11.000- 19,000
0.008 -0.15
430 - 680
840- 1.500
2.6 - 4.4
—
..
—
18-30
-------
TABLE 7 (Continued)
SUMMARY OF ERCO DATA FOR
TOTAL CONSTITUENT ANALYSIS OF SOLID SAMPLES
Page 2
Sector
Lead/Zinc
Total * of Samples is 2
Gold
Total # of Samples is IS
IroD'Taconite
Total if of Samples is 2
SOLID SAMPLING
Constituent
Ag
As
Ba
Be
Cd
Cr
Cu
Fe
Hg
Ma
Ni
Pb
Sb
Se
Tl
Zn
Ag
As
Ba
Be
Cd
Cr
Cu
Fe
Hg
Mn
Ni
Pb
Sb
Se-
ll
Zn
Ag
As
Ba
Be
Cd
Cr
Cu
Fe
Hg
Mn
Ni
Pb
Sb
Se
Tl
Zn
* of Samples
Detected in
0
2
2
0
2
0
2
2
0
2
1
2
0
0
0
2
11
15
15
13
8
14
15
15
15
15
13
IS
4
4
1
15
0
2
2
2
0
1
2
2
2'
2
1
2
0
0
0
2
Concentration
Range (in ppm,
unless otherwise
notefl)
*.
1.6-2.3
130 - 170
..
2.5 - 2.9
_
32-37
1.200- 1,400
..
56-57
3.6
23 -34
„
„
„
600 - 820
0.36 - 15
24-500
1.4 - 250
0.23 - 21
0.69 - 130
3.2-7.6
9.3 - 2.800
15.000 - 94.000
0.012 - 20
21 - 11,000
2.8*46
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2.7-21
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23 - 2"?.000
M
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7.2-32
0.31 -0.45
..
12
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26.000- 110.000
0.017 - 0.059 !
1.600- 9.400
7.8
3.8-4.8
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18-20 ;
-------
TABLE 7 (Continued)
SUMMARY OF ERCO DATA FOR
TOTAL CONSTITUENT ANALYSIS OF SOLED SAMPLES
Page 3
1 SOLID SAMPLING
Sector
Phosphate
Total X of Samples is 6
Beryllium
Total # of Samples is 2
Zirconium/
Titanium
Total # of Samples is 2
Constituent
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As
Ba
Be
Cd
Cr
Cu
Fe
Hg
Mn
Ni
Pb
Sb
Se
Tl
Zn
Ag
As
Ba
Be
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Cr
Cu
Fe
Hg
Mn
Ni
Pb
Sb
S«
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Zn
Ag
As
Ba
Be
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Cr
Cu
Fe
Hg
Mn
Ni
Pb
Sb
Se
Tl
Zn
# of Samples
Detected in
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5
5
5
2
5
4
5
5
6
5
5
0
0
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0
2
2
2
0
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1
2
0
2
0
0
L
2
0
0
2
0
0
0
0
2
0
2
0
1
0
0
0
1
Concentration
Range (in ppm.
unless otherwise
noted*
«
6.2 • 32
9.7 - 190
0.30 - 1.4
4.1 -4.6
3.2 - 500
6.5 - 14
540 - 17,000
0.005-0.12
7.8 - 130
4.8-38
7.1-20
.
..
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„
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10-26
11 -81
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3,500 - 3,700
0.012
370 - 3.600
..
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—
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82 • 160
—
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..
5.5
..
„
..
3.9
-------
TABLE 7 (Continued)
SUMMARY OF ERCO DATA FOR
TOTAL CONSTITUENT ANALYSIS OF SOLID SAMPLES
Page 4
Sector
Rare Earths
Total It of Samples is 3
Copper
Total # of Samples is 15
Zinc
Total
-------
TABLE 7 (Continued)
SUMMARY OF ERCO DATA FOR
TOTAL CONSTITUENT ANALYSIS OF SOLE) SAMPLES
Page S
Sector
Silver
Total f of Samples is 7
SOLO) SAMPLING
Constituent
Ag
As
Ba
Be
Cd
Cr
Cu
Fe
Hg
Mo
Ni
Pb
Sb
Se
Tl
Zn
i of Samples
Detected in
7
7
7
0
0
4
7
7
7
7
7
7
5
0
0
7
Concentration
Range (in ppm,
unless otherwise
noted)
1.5 - 8.7
4.3 - 2.000
5.2 - 670
..
5.4- 11
62 - 570
1,900 - 220,000
0.039 - 0.89
390 - 22,000
2.6- 11
99 - 170
3.6 • 68
..
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