A. Based on the assumption that houses built between 1941 and 1980 have footing drains connected to sanitary sewer, the remaining potential FDD equivalents is approximately 15,000. Note: this includes both single family and multi-family properties.

We’ve discovered during our investigation work throughout the course of the program that, although some houses built prior to 1941 have connected footing drains, the majority do not have connected footing drains. Therefore, these homes are excluded from the above estimate.