Element

Score Index (Sj)

Weightage Factor (Wj)

5

4

3

2

1

0

Mn

<300

301 - 900

901 - 1200

1201 - 1500

1201 - 1400

>1500

1

B

<3.0

3.0 - 5.0

5.0 - 7.0

7.0 - 9.0

9.0 - 11.0

>11.0

1

Zn

<0.151

0.151 - 0.300

0.301 - 0.500

0.501 - 0.700

0.701 - 0.90

>0.90

1

Ti

<15

15.1 - 20

20.1 - 25

25.1 - 30

30.1 - 35

>35

1

Sn

<2

2.1 - 3

3.1 - 4

4.1 - 5

5.1 - 6

>6

1

Sr

<1

1.1 - 10

10.1 - 20

20.1 - 30

30.1 - 40

>40

1

Sb

<1

1.1 - 2

2.1 - 3

3.1 - 4

4.1 - 5

>5

2

Ba

<100

100 - 200

200 - 300

300 - 400

400 - 500

>500

2

Li

<2

2.1 - 4

4.1 - 6

6.1 - 8

8.1 - 10

>10

2

Be

<1

1.1 - 5

5.1 - 10

10.1 - 15

15.1 - 20

>20

2

Co

<10

10.0 - 20.0

20.1 - 30.0

30.1 - 40.0

40.1 - 50.0

>50

2

Mo

<2

2.1 - 4.0

4.1 - 6.0

6.1 - 8.0

8.1 - 10.

>10

2

Cu

<51

51 - 100

101 - 200

201 - 400

401 - 600

>600

2

V

<10

10.1 - 30

30.1 - 50

50.1 - 70

70.1 - 90

>90

2

Ni

<21

21 - 40

41 - 80

81 - 120

121 - 160

>160

2

Tl

<0.15

0.15 - 0.25

0.26 - 0.35

0.36 - 0.55

0.56 - 0.75

>0.75

2

Se

<0.5

0.5 - 1.5

1.6 - 2.5

2.6 - 3.5

3.6 - 7.5

>7.5

3

Pb

<100

100 - 150

150 - 200

200 - 250

250 - 300

>300

3

Cr

<51

50 - 100

100 - 150

150 - 200

200 - 250

>250

3

Cd

<0.3

0.3 - 0.6

0.7 - 1.0

1.1 - 2

2.0 - 4.0

>4.0

5

As

<4

4.0 - 8.0

8.1 - 12

12.1 - 16.0

16.1 - 22.0

>22

5

Hg

<0.025

0.025 - 1.0

0.1 - 0.2

0.21 - 0.3

0.31 - 0.4

>0.4

5