Table 4. Leaching Concentrations of HWIR and CCS.
| heavy metal | Cu (mg/L) | Zn (mg/L) | Cr (mg/L) | Pb (mg/L) |
|---|---|---|---|---|
| HWIR | 15.96 | 70.60 | 0.98 | 1.14 |
| CCS | 6960.75 | 4840.88 | 4.8 | |
| US EPA limit | 15 | 5 | 5 |
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