Option 2 for site that is partially zero-irrigation

Lyle - That's a tough one. The answer to the first part is fairly clear to me - you should definitely include the area of any landscaped area that does not require irrigation due to the nature of the vegetation. In a perfect world, everyone replaces their turf grass with native/adapted vegetation that doesn't need irrigation - the credit certainly should reward instances where that is the case. A detailed site plan showing the various vegetation types would be key to that submittal. That being said, I'm not sure how to go about documenting an irrigation approach that involves a hose and sprinkler. Assuming there's no water meter data, you'd need to really help the reviewer feel confident that you know exactly how much water you're using with that equipment. Hope that helps at least a little, Dan

Hi Lyle, Hopefully this doesn't come too late to be of use to you. But, regarding the non-irrigated areas, I have had success on prior projects using the methodology you propose (setting IE=0 to achieve a TWA of 0). In the table on the credit template, we simply indicated "non-irrigated vegetation" for the landscape type. No additional documentation was required aside from the landscape plan.