Per the USGBC Guide, it says that the project must manage rainwater runoff from the entire site within the project boundary. My project is a high rise building in downtown San Francisco, and it is collecting all of the rainwater falling on the roof and reusing it for irrigation and toilet flushing. However, there are sidewalk areas at-grade that are not going to be detained and will drain directly to the city storm drain system. If I am able to store the volume from the 95% storm in a cistern and reuse this volume by just collecting rainwater from the roof, will it satisfy the credit? Or, do I also need to capture the runoff from at-grade sidewalk areas  within the project boundary for reuse to earn the points?