commissioner nageswaran got in ahead of me. i couldn't agree more that the comparison this comparison table was fascinating. it comparing the alternatives -- the preservation alternative which is intended within our scope of discussion to reduce impacts on built environments and historic resources is the only alternative that has similar. alternative. quite a distinction in that respect can i request more detail on the timing of this approval and the city survey. you know we got the information on the eir. i'm not clear exactly when -- board of supervisors will take action or may be the board of supervisors don't take action. >> the eir is planed go for certification at planning early in 2023. dp you know the city wide survey is multiyear project. so -- to be clear is that as project review continues we will be in the field during of the survey employs as that information come in that the inform project review. so we have historic resources that are identified in this document that the snapshot of 2021 -- but does in the mean a