T-Mobile West, LLC is proposing to modify an existing wireless telecommunications facility on an existing building located at 510 26th Ave., San Francisco, San Francisco County, CA 94121. The modifications will consist of installing a new natural gas generator mounted on the existing 67 ft. rooftop (overall structure height is 74 ft. including all appurtenances). Any interested party wishing to submit comments regarding the potential effects the proposed facility may have on any historic property may do so by sending such comments to: Project 6121006789 - TC EBI Consulting, 6876 Susquehanna Trail South, York, PA 17403, or at (339) 234-2597.