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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