| S/N | Sample | Average concentration of trace elements compared with the EPA Effluent Standards, EPAES | |||||||||||||||
| Cu (×102 ppm) | EPA ES | Pb (×102 ppm) | EPA ES | Mg (×102 ppm) | EPA ES | Cr (×102 ppm) | EPA ES | Ni (×102 ppm) | EPA ES | Zn (×102 ppm) | EPA ES | Mn (×102 ppm) | EPA ES | Cd (×102 ppm) | EPA ES | ||
| 1 | Blank Sample | - | 3.00 | - | 1.00 | - | N/A | - | 2.00 | - | 1.00 | - | 5.00 | - | 2.00 | - | 0.03 |
| 2 | Standard 1 | 2.00 | 2.00 | 5.00 | 5.00 | 5.00 | 0.50 | 5.00 | 5.00 | ||||||||
| 3 | Standard 2 | 4.00 | 4.00 | 10.00 | 10.00 | 10.00 | 1.00 | 10.00 | 10.00 | ||||||||
| 4 | Standard 3 | 6.00 | 6.00 | 15.00 | 15.00 | 15.00 | 1.50 | 15.00 | 15.00 | ||||||||
| 5 | Standard 4 | 8.00 | 8.00 | 20.00 | 20.00 | 20.00 | 2.00 | 20.00 | 20.00 | ||||||||
| 6 | Standard 5 | 10.00 | 10.00 | - | - | - | - | - | - | ||||||||
| 7 | WTPI | 0.046 | 0.125 | 0.284 | ND | ND | 0.014 | ND | ND | ||||||||
| 8 | WTPAWW | 0.013 | 0.109 | 0.309 | ND | ND | 0.012 | 0.023 | 6.815 | ||||||||
| 9 | FLL | ND | 0.259 | 4.174 | ND | ND | ND | ND | 9.433 | ||||||||
| 10 | FHKG | 0.018 | ND | 0.229 | ND | ND | 0.011 | ND | 8.731 | ||||||||
| 11 | AUTOSWW | ND | 0.116 | 0.553 | ND | 0.003 | 0.142 | ND | 13.898 | ||||||||
| 12 | CWW | 0.038 | 0.082 | 0.334 | 0.089 | 0.036 | 0.034 | ND | ND | ||||||||
| 13 | FSSE | 0.031 | ND | 0.281 | 0.349 | ND | 0.005 | ND | ND | ||||||||
| 14 | CLW | 0.024 | 0.144 | 0.220 | 0.156 | ND | ND | ND | ND | ||||||||
| 15 | FRIW | ND | 0.076 | 0.132 | ND | 0.056 | 0.007 | ND | ND | ||||||||
| 16 | PGGHW | 0.030 | 0.120 | 0.282 | ND | ND | 0.053 | ND | ND | ||||||||
| 17 | SLL | 0.267 | 0.026 | 8.216 | ND | 0.009 | 0.116 | ND | 18.564 | ||||||||
| 18 | BHW | 0.004 | 0.067 | 0.304 | ND | ND | 0.023 | ND | ND | ||||||||