Figure 1

Fig_1.xls

Arsenic Air Sample ResultsNIOSH REL 2.0 Micrograms/Cubic Meter Ceiling Limit

OSHA PEL 10.0 Micrograms/Cubic Meter

0

1

10

100

1000

CS N S

SS

SS

DS

CP G

SG

Abrasive

Mic

rog

ram

s P

er C

ub

ic M

eter

Range of Results

Geometric Mean

Figure 2

Fig_2.xls

Beryllium Air Sample ResultsNIOSH REL 0.50 micrograms/cubic meter OSHA PEL 2.0 micrograms/cubic meter

0

0

1

10

CS N S

SS

SS

DS

CP G

SG

Abrasive

Mic

rog

ram

s P

er C

ub

ic M

eter

Range of Results

Geometric Mean

Figure 3

Fig_3.xls

Cadmium Air Sample ResultsNIOSH REL - Limit of Quantification (Lowest Feasible Concentration)

OSHA PEL 5.0 micrograms/cubic meter

0

0

1

10

100

CS N S

SS

SS

DS

CP G

SG

Abrasive

Mic

rog

ram

s P

er C

ub

ic M

eter

Range of Results

Geometric Mean

Figure 4

Fig_4.xls

Chromium Air Sample ResultsNIOSH REL 500.0 micrograms/cubic meter OSHA PEL 500.0 micrograms/cubic meter

1

10

100

1000

10000

CS N S

SS

SS

DS

CP G

SG

Abrasive

Mic

rog

ram

s P

er C

ub

ic M

eter

Range of Results

Geometric Mean

Figure 5

Fig_5.xls

Lead Air Sample ResultsNIOSH REL 100.0 micrograms/cubic meter OSHA PEL 50.0 micrograms/cubic meter

1

10

100

CS N S

SS

SS

DS

CP G

SG

Abrasive

Mic

rog

ram

s P

er C

ub

ic M

eter

Range of Results

Geometric Mean

Figure 6

Fig_6.xls

Manganese Air Sample ResultsNIOSH REL 1000.0 micrograms/cubic meter

OSHA PEL 5000.0 micrograms/cubic meter Ceiling Limit

1

10

100

1000

10000

100000

CS N S

SS

SS

DS

CP G

SG

Abrasive

Mic

rog

ram

s P

er C

ub

ic M

eter

Range of Results

Geometric Mean

Figure 7

Fig_7.xls

Nickel Air Sample ResultsNIOSH REL 15.0 micrograms/cubic meter

OSHA PEL 1000.0 micrograms/cubic meter

1

10

100

1000

10000

CS N S

SS

SS

DS

CP G

SG

Abrasive

Mic

rog

ram

s P

er C

ub

ic M

eter

Range of Results

Geometric Mean

Figure 8

KTAPhase2FIG_8.XLS

Respirable Quartz Air Sample ResultsNIOSH REL 0.05 milligrams/cubic meter

OSHA PEL As Calculated

0

1

10

100C

S N S

SS

SS

DS

CP G

SG

Abrasive

Mill

igra

ms

Per

Cu

bic

Met

er

Range of Results

Geometric Mean

Figure 9

Fig_9.xls

Titanium Air Sample ResultsNIOSH REL - Limit of Quantification (Lowest Feasible Concentration)

OSHA PEL 15000.0 micrograms/cubic meter

1

10

100

1000

10000

CS N S

SS

SS

DS

CP G

SG

Abrasive

Mic

rog

ram

s P

er C

ub

ic M

eter

Range of Results

Geometric Mean

Figure 10

Fig_10.xls

Vanadium Air Sample ResultsNIOSH REL 2.0 Micrograms/Cubic Meter Ceiling Limit

OSHA PEL 10.0 Micrograms/Cubic Meter

1

10

100

1000

CS N S

SS

SS

DS

CP G

SG

Abrasive

Mic

rog

ram

s P

er C

ub

ic M

eter

Range of Results

Geometric Mean

KTAPhase2FieldStudyBulksFig11_22.xls / Fig 11

Figure 11Arsenic Virgin Bulk Sample Results

0

10

20

30

40

50

60

Mic

rog

ram

s p

er G

ram

CoalSlag

NickelSlag

Staurolite Silica Sand Silica Sand with Suppressant

CopperSlag

Garnet Steel Grit

Fig11_22.xls / Fig 12

Figure 12Beryllium Virgin Bulk Sample Results

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

Mic

rog

ram

s p

er G

ram

CoalSlag

NickelSlag

Staurolite Silica Sand Silica Sand with Suppressant

CopperSlag

GarnetSteel Grit

Fig11_22.xls / Fig 13

Figure 13Cadmium Virgin Bulk Sample Results

0

0.01

0.02

0.03

0.04

0.05

0.06

Mic

rog

ram

s p

er G

ram

CoalSlag

NickelSlag

StauroliteSilica Sand Silica Sand with

SuppressantCopper

SlagGarnet Steel Grit

Fig11_22.xls / Fig 14

Figure 14Chromium Virgin Bulk Sample Results

0

200

400

600

800

1000

1200

1400

Mic

rog

ram

s p

er G

ram

CoalSlag

NickelSlag

Staurolite Silica Sand Silica Sand with Suppressant

CopperSlag

Garnet Steel Grit

Fig11_22.xls / Fig 15

Figure 15Lead Virgin Bulk Sample Results

0

0.5

1

1.5

2

2.5

3

3.5

4

4.5

5

Mic

rog

ram

s p

er G

ram

CoalSlag

NickelSlag

Staurolite Silica Sand

Silica Sand with Suppressant

CopperSlag

Garnet Steel Grit

Fig11_22.xls / Fig 16

Figure 16Manganese Virgin Bulk Sample Results

0

1000

2000

3000

4000

5000

6000

7000

8000

Mic

rog

ram

s p

er G

ram

CoalSlag

NickelSlag

Staurolite Silica Sand

Silica Sand with Suppressant

CopperSlag

Garnet Steel Grit

Fig11_22.xls / Fig 17

Figure 17Nickel Virgin Bulk Sample Results

0

100

200

300

400

500

600

700

800

Mic

rog

ram

s p

er G

ram

CoalSlag

NickelSlag

Staurolite Silica Sand

Silica Sand with Suppressant

CopperSlag

Garnet Steel Grit

Fig11_22.xls / Fig 18

Figure 18Silver Virgin Bulk Sample Results

0

0.2

0.4

0.6

0.8

1

1.2

1.4

1.6

Mic

rog

ram

s p

er G

ram

CoalSlag

NickelSlag

Staurolite Silica Sand Silica Sand with Suppressant

CopperSlag

Garnet Steel Grit

Fig11_22.xls / Fig 19

Figure 19 Titanium Virgin Bulk Sample Results

0

100

200

300

400

500

600

700

800

900

Mic

rog

ram

s p

er G

ram

Coal Slag

NickelSlag

Stauroite Silica Sand Silica Sand with Suppressant

Copper Slag

Garnet Steel Grit

Fig11_22.xls / Fig 20

Figure 20 Vanadium Virgin Bulk Sample Results

0

10

20

30

40

50

60

70

80

Mic

rog

ram

s p

er G

ram

CoalSlag

NickelSlag

Staurolite Silica Sand withSuppressant

Silica Sand Copper Slag

Garnet Steel Grit

Fig11_22.xls / Fig 21

Figure 21Quartz Virgin Bulk Sample Results

0

10

20

30

40

50

60

70

80

Per

cen

t

CoalSlag

NickelSlag

Staurolite SilicaSand

CopperSlag

Garnet Steel GritSilica Sand withSuppressant