Green Star Technical Clarification Rulings
Technical Clarifications for Green Star represent our answers to Technical Questions submitted by projects, and provide further guidance and reference to others. The list is regularly updated.
There are two types of Technical Clarifications listed in the table below:
General Clarifications
These are extensions to the guidance provided in the Submission Guidelines. They clarify and sometimes supersede the original Credit Criteria or
Compliance Requirements. General Clarifications set precedent for future project teams to follow. Should a project team wish to apply a general clarification to its project, there is no requirement for further Technical Questions to be submitted. NZGBC Assessors will also use them as precedents to assess submissions.
Project Specific Clarifications
These are published as references for other projects but, unlike General Clarifications, they do not set precedent. They often relate to special
situations where multiple prerequisites exist for a particular project and are less likely to reoccur to another project. Therefore, rulings set for Project Specific Clarifications are often conditional and will likely vary for other projects. Each project still needs to submit its own Technical Questions and provides evidence relating to its own building in order to have a similar ruling approved for that specific building.
Should you wish to apply any Technical Clarification for legacy rating tools to your projects, please submit a Technical Question to the NZGBC to
explain why and how it applies. You can access the online Technical Question form here
| Technical Question Title | Tool Version | Date Released | Credit Name | Sub-credit Name | TC Link |
|---|---|---|---|---|---|
| Conditional Acceptance that Continuous Simulation Load Modelling not Required | DABv1, DABv1.1 | November 2020 | 25 - Stormwater | Stormwater Pollution Targets | Link |
|
Approved Ruling: It is conditionally accepted that the requirement for continuous simulation load modelling is not required in this instance provided the installed engineering design is consistent with the referenced assumptions in CCC WWDG Table 6-6 and the Australian guidance document for infiltration (biofiltration) treatment Adoption Guidelines for Stormwater Biofiltration Systems. With respect to designing for the ‘first flush’, this should be defined by the applicant in accordance with relevant design standards and the design developed to ensure all of this flow, with suitable allowance for blockage / clogging of the designed media, is treated before overflow occurs. It is noted that the Greenstar Table 25.1 pollution removal requirements are all in excess of the minimum expected removal rates presented in CCC WWDG Table 6-6 and it will therefore need to be demonstrated that the design and installation is best practice to achieve the required pollution removal targets with adequate maintenance plans in place to ensure continued performance over the longer term |
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