| S. No | Sample ID | Sample Location |
| 1 | S1 | 2 km from Sardar Chemical Industries |
| 2 | S2 | 2500 m Sardar Chemical Industries and Cherat Paper Sack |
| 3 | S3 | 1 km Shafi Chemical Industries and Hamza Steel Industries |
| 4 | S4 | 500 m Shafi Chemical Industries Plot-2 |
| 5 | S5 | 500 m T.W Metal Recycling Industries and Poyal Jadoon Marble Factory |
| 6 | S6 | 1 km T.W Metal Recycling Industries Plot 11/16 |
| 7 | S7 | 200 m Shafi Enterprises |