When we sent the WE credit for review for our project, we sent a water use calculation stating that the potable water usage in the project has been reduced by 43% from a calculated baseline design. A minimum reduction of 20% is required. A plumbing fixture schedule was also provided.
One of the technical comments that came through was that the calculations for the non-residential water closets, urinals, lavatories and kitchen faucets indicate a total daily uses that differ from the standard calculation methodology. For which the technical advice given was to revise the form with the standard usage rates represented for non-residential water closets, urinals, etc. if project-specific conditions exist, provide a narrative and supplemental calculations describing these conditions.
What we actually did was use the reference form provided by the leeduser.com for the calculation of the total uses and the base line as well which automatically provided us with the total uses once we entered our FTEs transients and residents. All that was needed was just to select which groups used what kind of faucets.
However, now looking at the technical advice and that we now only have one shot at this; we need to be sure if what we are doing now is correct. The review says that we need to provide a supplemental calculation; does this mean we need to provide them with the calculation of the total uses? We have already prepared a total daily uses calculation for this credit, all we need is the confirmation that it is what has been asked. When we manually calculated the total uses instead of relying on the reference form, the data received weren’t so different?? What must have gone wrong? Any idea?
Also, do we need to provide them with the document showing the calculation of the dual flush fixture type if a dual flush fixture is used in the project??