Tube well Nos.

Recorded Electrical Conductivity just before lining

Predicted Electrical Conductivity 20 years after lining

1

4382

6988

2

2598

6994

3

887

6269

4

1599

6965

5

5032

6994

6

6990

6990

7

4523

4788 (still rising)

9

6998

7000

12

1210

6991

13

5037

6997

14

6610

6998

15

4223

4244

16

1307

6774

17

4282

5087

18

4845

6169