carla, chris mcdaniels, superintendent for bureau of environmental services. good morning. commissioners haven't seen you in a while, so it's good to see you guys, today, we plan to explain what our standards are for cleaning here in san francisco. and i and i also want to say that it's a team effort, the department of public works can't do all the work ourselves. we have partners, we have property owners, we have business owners, we have the public, then we have our community, districts that help us. so i want to start by saying that it's a joint effort. we really appreciate everybody's help because we can't do it by ourselves. this slide is like we always want to show you where we are located in the department. org chart. we're on the far right, street environmental services. we're under, deputy director jada durden, under carlos short as director. as bob referred to, this is kind of the cleaning standards informed by, we use these for as guidelines and they identify what we're supposed to be doing as far as standards. the next slide i wanted to share the different types