Division 3.1 Chemical Oxygen Demand (COD) in waste water from leather tanning sites

The COD value in waste water from leather tanning sites, when discharged to surface waters after treatment (whether on site or off site), shall not exceed 200,0 mg/l.

Assessment and verification: the applicant or material supplier, as appropriate, shall provide a declaration of compliance supported by detailed documentation and test reports in accordance with ISO 6060 showing compliance with this criterion on the basis of monthly averages for the six months preceding the application. The data shall demonstrate the compliance of the production site or, if the effluent is treated off site, of the waste water treatment operator.