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
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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