When determining sewer basin and sub-basin areas for an I/I analysis, do you typically use the entire acreage of the sub-basin, or do you subtract out undeveloped areas, native growth areas, critical areas, etc. for a better comparison of I/I rates between sub-basins.

When determining sewer basin and sub-basin areas for an I/I analysis, do you typically use the entire acreage of the sub-basin, or do you subtract out undeveloped areas, native growth areas, critical areas, etc. for a better comparison of I/I rates between sub-basins.