Please refer to ZDHC Wastewater Guidelines Version 2.0 and to Sampling and ZDHC Wastewater and Sludge Laboratory Sampling and Analysis Plan Version 2.1.
In order to apply for acceptance as a ZDHC Wastewater Testing Laboratory, the applicant laboratory must request acceptance for all of the parameters listed on the ZDHC Wastewater Guideline. Additionally, the following is required:
- ISO 17025 certification for all MRSL parameters, even in a different kind of matrix
- ISO 17025 certification for at least 50% of the conventional parameters. Successful completion of correlation testing for those parameters not ISO 17025 certified
- ZDHC Approved Test methods shall be used or an equivalent method*, with the exception of Colour and COD
- Follow/Apply the ZDHC Wastewater and Sludge Laboratory Sampling and Analysis Plan
- Not more than 60% of parameters for wastewater as listed in the platform could be subcontracted
The outsourced laboratory may be an affiliate of, or external to, the laboratory accredited for testing.
*An equivalent method is defined by ZDHC as a method the has the fundamentally same sample collection (for example: container, preservative), sample preparation (for example: derivatization, extraction, digestion) and analysis (for example; GC, GC/MS, LC, LC/MS). The laboratory has to share with ZDHC relevant information to assess the equivalence. Alternatively, a method may be accepted by ZDHC if a method validation process has been successfully completed, and those results/data are shared with ZDHC. The pre-approval process is conducted so that data from one lab can be compared directly and equivalently to any other lab in the ZDHC program