August 2020 EN-c4f_annexiitechspeciiitechoffer_en.docx  EN-c4f_annexiitechspeciiitechoffer_en.docx Page 38 of 76  Bi: ≤5 mg/kg  Ca:  ≤400 mg/kg  Cd: ≤5 mg/kg  Co: ≤5 mg/kg  Cr: ≤5 mg/kg  Cu: ≤5 mg/kg  Fe: ≤10 mg/kg  K: ≤200 mg/kg  Li: ≤5 mg/kg  Mn: ≤20 mg/kg  Mo: ≤5 mg/kg  NH$_{4}$ $^{+}$:  ≤20 mg/kg  Na:  ≤100 mg/kg  Ni: ≤5 mg/kg 