The ZDHC Leather Wastewater Guidelines Addendum were created to expand the scope to include the leather industry, and are an addition to the current ZDHC Wastewater Guidelines Version 1.1. These ZDHC Leather Wastewater Guidelines must be read in conjunction with ZDHC Wastewater Guidelines Version 1.1 and the instructions given in sections 9.0-16.0 must be followed. Sections 9.0-16.0 apply to textiles and leather, and describe the requirements for sampling, testing and reporting into the ZDHC Gateway, as well as conformance to the Guidelines