heavy metals and uranium in soil and water on sierrita site
table 3-2
esperanza mill
2005 analytical summary
|
arsenic |
beryllium |
cadmium |
copper |
manganese |
molybden |
nickel |
zinc |
surface soil samples
(2-3 inch depth) (mg/kg) |
em-3 |
34.8 |
1 |
5.65 |
11,600 |
715 |
1,570 |
11 |
824 |
em-4 |
10.8 |
0.55 |
2.55 |
8,360 |
657 |
630 |
25 |
443 |
em-5 |
3.62 |
0.37 |
0.59 |
1,880 |
323 |
122 |
8 |
195 |
em-9 |
5.01 |
0.44 |
0.57 |
522 |
340 |
230 |
5 |
86 |
em-10 |
9.52 |
0.93 |
1.78 |
814 |
538 |
239 |
8 |
256 |
em-13 |
4.23 |
0.72 |
0.83 |
668 |
172 |
2,640 |
8 |
64 |
em-14 |
11.8 |
0.26 |
0.85 |
409 |
30 |
471 |
< 5 |
29 |
em-17 |
101 |
0.33 |
2.8 |
2,330 |
75.5 |
1,690 |
< 1 |
77 |
em-18 |
10.4 |
0.48 |
2.31 |
3,560 |
173 |
1,470 |
4 |
67 |
em-20 |
13.7 |
0.55 |
2.39 |
4,710 |
405 |
6,500 |
14 |
234 |
em-21 |
4.09 |
0.17 |
0.32 |
514 |
110 |
151 |
< 1 |
25 |
em-26 |
23 |
2.36 |
1.99 |
5,220 |
928 |
936 |
20 |
429 |
|
|
|
|
|
|
|
|
|
non-residential srl |
10 |
11 |
850 |
63,000 |
43,000 |
8,500 |
34,000 |
510,000 |
subsurface soil
samples/depth (mg/kg)
|
em-t-1-1.5' |
28.3 |
0.41 |
1.3 |
2,200 |
151 |
305 |
6 |
51 |
em-t-1-2' |
23 |
0.82 |
na |
9,850 |
na |
229 |
na |
na |
em-t-1-6' |
5.49 |
0.85 |
0.26 |
1,700 |
146 |
24 |
9 |
100 |
em-t-1-13' |
1.35 |
0.69 |
na |
159 |
na |
3 |
na |
na |
em-t-2-2' |
3.58 |
0.51 |
na |
533 |
na |
16
|
na |
na |
em-t-2-2.5' |
5.3 |
0.70 |
3.6 |
1,170 |
31 |
1050 |
< 5 |
40 |
em-t-2-b18" |
6.4 |
0.90 |
0.5 |
1,400 |
198 |
103 |
< 5 |
169 |
em-t-3-4 |
38.8 |
0.90 |
1.6 |
1,850 |
212 |
260 |
< 5 |
111 |
em-t-3-6' |
4.7 |
1.03 |
1.37 |
1,270 |
593 |
21 |
8 |
209 |
em-t-3-12' |
3.52 |
1.43 |
na |
733 |
na |
20 |
na |
na |
em-t-4-6' |
6.77 |
0.76 |
2.83 |
2,020 |
250 |
550 |
6 |
104 |
em-t-4-10' |
2.66 |
0.76 |
na |
643 |
na |
88 |
na |
na |
water quality sample (mg/kg) |
em-ud |
< 0.010 |
0.046 |
0.2 |
0.17 |
71 |
0.18 |
0.15 |
3.7 |
em-t-4 |
< 0.010 |
< 0.0010 |
< 0.0030 |
< 0.010 |
6.8 |
2.4 |
< 0.010 |
0.078 |
em-b-1 |
< 0.010 |
< 0.0010 |
0.0054 |
< 0.010 |
18.0 |
0.05 |
0.033 |
na |
c-sump |
< 0.010 |
0.0039 |
0.016 |
0.95 |
3.7 |
0 .63 |
0.030 |
1.4 |
em-up |
0.012 |
< 0.0010 |
< 0.0030 |
0.011 |
< 0.010 |
0.041 |
< 0.010 |
< 0.050 |
em-mid |
< 0.010 |
0.069 |
.0069 |
170 |
12 |
1.5 |
0.18 |
6.5 |
em-low |
< 0.010 |
< 0.0010 |
0.0083 |
0.81 |
4.0 |
0.73 |
0.019 |
0.54 |
|
|
|
|
|
|
|
|
|
awqs |
0.05a |
0.004 |
0.005 |
ns |
ns |
ns |
0.10 |
ns |
bold - concentration exceeds standard
notes:
srl = soil remediation level
gpl = groundwater protection level
awqs = aquifer water quality standards
rbsl = risk based screening level
mg/kg = milligrams per kilograms
table 3-3. summary of uranium mass in groundwater
sierrita mine, green valley, arizona
table 3-3. summary of uranium mass in groundwater
sierrita mine, green valley , arizona
monitor
well or
location
|
average
uranium
(�g/l)
|
maximum
uranium
(�g/l)
|
minimum
uranium
(�g/l)
|
earliest
date
|
most
recent
date |
number of
data
points |
|
|
|
|
|
|
|
mh-17 (hr) |
105.4 |
150 |
23.1 |
6/26/1997 |
7/13/2007 |
34 |
pz-01 (tp) |
3.8 |
4.3 |
3.3 |
6/19/1997 |
8/12/1997 |
2 |
*mh-18 (tp) |
16.2 |
23 |
10 |
6/19/1997 |
7/13/2007 |
30 |
|
|
|
|
|
|
|
pz-16 (dv) |
24.3 |
76 |
2.3 |
11/2/2000 |
7/23/2007 |
23 |
*mh-19 (tp) |
25.5 |
96.5 |
12 |
9/22/1998 |
7/20/2007 |
39 |
|
|
|
|
|
|
|
*mh-27 (dv) |
nd |
nd |
nd |
3/30/2005 |
8/6/2007 |
23 |
bw-02 (dv) |
9.5 |
154 |
nd |
7/3/2000 |
7/23/2007 |
19 |
*mh-20((dv) |
6.1 |
18.6 |
nd |
12/23/1997 |
7/24/2007 |
36 |
|
|
|
|
|
|
|
pz-02 (dv) |
13.5 |
21 |
9.2 |
6/27/1997 |
7/23/2007 |
30 |
pz-03 (rs) |
63.3 |
99.6 |
32 |
6/26/1997 |
7/12/2007 |
25 |
bw-03 (rs) |
77.1 |
198 |
nd |
7/3/2000 |
7/23/2007 |
24 |
|
|
|
|
|
|
|
*mh-21 (rs) |
1,132 |
1,600 |
560 |
6/27/1997 |
7/13/2007 |
34 |
pz-04 (rs) |
138 |
170 |
109 |
6/23/1997 |
7/12/2007 |
7 |
pz-05 (rs) |
450 |
767 |
81.2 |
6/26/1997 |
7/16/2007 |
31 |
pz-06 (rs) |
13 |
20 |
9 |
7/2/1997 |
7/12/2007 |
8 |
*mh-22 (q) |
319.4 |
509 |
133 |
6/24/1997 |
7/16/2007 |
37 |
*mh-23 (dv) |
59.2 |
130 |
6.7 |
7/2/1997 |
7/16/2007 |
33 |
|
|
|
|
|
|
|
pz-07 (q/rs) |
12.3 |
13 |
12 |
11/16/2006 |
7/24/2007 |
4 |
pz-09 (q/rs) |
190 |
210 |
170 |
7/11/1997 |
8/26/1997 |
2 |
pz-08 (dv) |
14.3 |
15 |
14 |
11/14/2006 |
7/12/2007 |
4 |
|
|
|
|
|
|
|
mh-30 (q) |
26.8 |
27 |
26 |
11/9/2006 |
7/11/2007 |
4 |
*mh-14 (q) |
26.6 |
34 |
17 |
4/6/1998 |
7/10/2007 |
28 |
*mh-28 (q) |
28.8 |
33 |
25 |
1/24/2006 |
8/6/2007 |
19 |
*mh-15w (q) |
54.6 |
72 |
11 |
2/26/1998 |
7/11/2007 |
31 |
*mh-29 (q) |
28.3 |
32 |
26 |
1/24/2006 |
8/6/2007 |
22 |
*mh-16w (q) |
5.9 |
10 |
4 |
2/26/1998 |
7/11/2007 |
29 |
epa mcl |
30 ug/l** |
|
|
|
|
|
**mcl for uranium established 2003
notes: * - denotes app point of compliance (poc) well
hr - harris ranch monzonite
tp - formation of tinaja peak
dv - demetrie volcanics
rs - ruby star granodiorite
q - alluvium
q/rs - alluvium over ruby star granodiorite
source: voluntary remediation program (vrp)
investigation work plan
volume i of ii
text, tables & figures
freeport-mcmoran sierrita inc.
6200 west duval mine road
green valley, az 85622-0527
april 2008
contact: ned hall
(520) 648-8857
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