Year

Hardness

Calcium

mg/l

Magnesium

mg/l

Sulfate

Arsenic

TDS

Alkalinity

Percentage of Sulfate in TDS

6/1/94 (1^st)

65

70.6

1.31

94.5

.045

266

123

35%

6/1/94 (4^th)

146

46.7

7.14

59.8

.011

286

166

21%

11/03/94

7,000 gallons

Sulfuric Acid

12/19/94

5,000 gallons

Leach Solution

10/05/95

160

59.96

4.33

--

.013 - .015

422

125

11/20/95

138

396

35%

1/08/96

4,000 lbs.

Sulfuric Acid

1/10/96

2,000 lbs.

Sulfuric Acid

2/21/96

1,850 lbs.

Spent electrolyte

3/23/96

3,000 lbs.

Sulfuric Acid

4/15/96

210

376

55.6%

6/12/96

13,263 lbs.

Spent electrolyte

7/22/96

3,000 lbs.

Sulfuric Acid

8/07/96

131

470

28%

8/11/96

100 gallons

Sulfuric Acid

9/11/96

374

546

69%

10/21/96

--

406

1/13/97

233

640

36.4%

3/29/97

8,000 lbs.

Sulfuric Acid-93%

7/11/97

2,798 lbs.

Sulfuric Acid

7/16/97

297

564

52.6%

10/27/97

337

728

46.3%

12/23/97

329

616

53.4%

2/09/98

340

.012

613

55.5%

5/04/98

120,000 gallons

� Sulfuric

� Acid/Cu

5/05/98

40,000 gallons

�� Sulfuric

� Acid/Cu

6/22/98

356

873

40.7%

8/10/98

360

748

48.1%

11/30/98

553

696

79.5%

2/10/99

381

131

13

371

741

50.0%

7/15/99

405

766

52.8%

10/26/99

502

170

19

521

808

64.5%

1/11/00

521

179

18

390

757

51.5%

4/19/00

409

768

53.3%

5/22/00

5,350 gallons

��� Sulfuric

Acid/Cu

8/14/00

442

880

50.2%

10/18/00

456

704

64.7%

1/30/01

488

164

19

428

780

54.9%

4/04/01

430

--

7/03/01

1,209 lbs.

Sulfuric Acid

8/14/01

474

826

57.4

10/15/01

479

896

53.5

1/31/02

39,375 gallons

Sulfuric Acid

2/06/02

488

166

18

475

.007 - .015

922

51.5

4/08/02

476

776

61.3

7/10/02

481

863

55.7

11/05/02

487

908

53.6

2003

565

190

22

547

.011

956

57.2

2/04/03

519

175

20

504

871

57.9

4/19/03

8,722 lbs.

Sulfuric Acid

4/21/03

508

820

62.

2004

587

22

502

.010

952

52.7