Under what circumstances could a nonroof area covered with light gravel be considered as non-hardscape?

Hi, on a recent project we were requested to provide evidence that 5 buildings built within the last three years did not have carbon monoxide sensors installed in the basement car parks in order to

We have a small project that consists af an existing one level building that will have an major renovation.

Is a mixed of natural ventilation and Mechanical ventilation for a residence allowed? Ashrae 62.1-2007 does not mention the requirements for such conditions, or maybe I don't see it.

Vinyl electrical tapes (such as Scotch® Super 33+™ Vinyl Electrical Tape) are included in this credit?

How is the 25' radius applied when the smoking area is on a rooftop? Do we assume the smoke drifts up or do I need to worry about windows below the smoking area?

Are public lavatory and kitchen faucets excluded from the requirement to be WaterSense labelled?

Can you take credit of the water fixtures under CS for a project and also under CI when the interior is built? or only in one rating system?

Can you comply with this credit if you are removing asbestos?

We are working on a project where we are the sole tenant in the building. Can we use the whole building meters for our MPR6 reporting if there is no other user in the building?