Credit Interpretation Request
Statement of confirmation - manufacturer
Credit Interpretation Request Number
WAT1-C-RC1-0321
Ruling
2012-07-26
The Credit Interpretation Request (CIR) seeking approval for the use of a letter from the manufacturer confirming fixture flow/flush rates where product datasheets do not confirm these flow/flush rates is approved.
Erratum
Green Star SA - Retail Centre v1 Technical Manual: Page 203
Erratum Number
WAT1-E-RC1-0283
Guidance
2011-08-08
Documentation Requirements, Documentation Table, Design column, delete the bullet point which reads "Evidence of the application(s) for approval to the relevant authority". Also, in the As Built column, delete the bullet point which reads "Evidence of approval from the relevant authority".
Erratum
Green Star SA - Retaill Centre v1 Technical Manual: Page 204
Erratum Number
WAT1-E-RC1-0284
Guidance
2011-08-08
Documentation Requirements, Description of Documents, delete the paragraph headed "Evidence of the application(s)…" as well as the paragraph headed "Evidence of approval from the relevant authority…".
Technical Clarification
Evidence of approval from the relevant authority
Technical Clarification Number
WAT1-T-RC1-0287
Guidance
2011-06-09
"Where rainwater collection or water reuse systems are installed, project teams are no longer required to provide 'evidence of approval from the relevant authority' within their documentation submitted for a Green Star SA Design / As Built rating.
Whilst this documentation is no longer required to be included wihin the submission for Green Star SA certification, the GBCSA would expect that project teams adhere to all relevent authority regulations and requirements (including approval of such systems where required). "
Credit Interpretation Request
Off-site reclaimed water
Credit Interpretation Request Number
WAT1-C-RC1-0266
Ruling
2011-06-09
"The use of reticulated off-site reclaimed water is an acceptable way to reduce potable water consumption within the Green Star SA rating system. Although off-site harvesting and recycling systems are not specific attributes of the building seeking Green Star SA certification (as would be the case of an on-site water harvesting and recycling system), the fact that the building has chosen to incorporate the necessary infrastructure to connect their building services to the off-site service is, in this scenario, viewed as a building attribute.
The following additional documentation requirements apply where reticulated off-site reclaimed water is used:
For Green Star SA Design ratings;
• Evidence that the reclaimed water system is operational at the time of practical completion of the building.
• Confirmation from the off-site non-potable water supply vendor that the required supply is available to the project.
For Green Star SA As Built ratings;
• Evidence that the reclaimed water system is operational at the time of practical completion of the building.
• An extract from the contract between the off-site non-potable water supply vendor and the building owner must be provided."
Technical Clarification
Potable Water Calculator - 'intrinsic' flow controlling devices
Technical Clarification Number
WAT1-T-RC1-0112
Guidance
2010-11-09
Flow restrictors, aerators or other flow controlling devices which can only be removed from a fixture or fitting through the use of specialist equipment or tools commonly used by wet services sub-contractors or building maintenance staff, are considered an “intrinsic attribute” of the fixture or fitting. Similar devices which can be removed without the use of such tools (i.e. by hand) are not deemed intrinsic and cannot be used to claim water efficiency improvements within the Green Star SA Potable Water Calculator. For fixtures and fittings with such ‘intrinsic’ devices, product literature or manufacturer datasheets must clearly state the necessary water efficiency performance of the complete assembly with the flow controlling device for inclusion in the Green Star SA Potable Water Calculator. Water efficiency data for a fixture or fitting without such a flow controlling device that is nominally adjusted for the benefit of such flow limiting devices is not acceptable.
Technical Clarification
Groundwater
Technical Clarification Number
WAT1-T-RC1-0086
Guidance
2010-07-06
Previously unused groundwater seeping into building basements cannot be used in this credit as ‘non-potable’ or recycled water for amenities, unless it is used and then recycled within the building. See Technical Clarification WAT3-T-RC1-0088 regarding use in irrigation.
Technical Clarification
Potable water calculator - non-roof area harvesting
Technical Clarification Number
WAT1-T-RC1-0083
Guidance
2010-06-14
In the potable water calculator, projects may include rainwater/stormwater harvested from surfaces other than those given in the run-off coefficient list. However, the run-off coefficient of 0.65 for 'Flat gravel or turf roof (<30 pitch)' must be used. Project teams wishing to use an alternative rainwater run-off coefficient for such surfaces may submit a Credit Interpretation Request (CIR) clearly justifying the alternative run-off coefficient.
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