CaCO3
Location 2017 2018
1a 145 100
1b 120 110
1c 100 92
1d 100 76
2a 90 95
2b 80 55
2c 90 80
2d 80 64
3a 80 100
3b 80 90
3c 90 72
3d 80 80
4a 90 88
4b 90 80
4c 85 84
4d 95 60