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Thanks for your post, but please provide some proof as to why you believe that is the location of a further Tesla Supercharger. Thank you.
Note that Electrify America charging stations, and others, may be confused for Supercharger locations when they are in the early stages of construction. Given that there are three Supercharger locations very near by the location you posted about, it would surprise me to see yet another Tesla Supercharger in that area.
Install 3 EV charging units and stubbing conduit for a future (4th) charger. Install 1600A service equipment per plan, transformer installed and inspected by PG&E, Fencing and Landscaping.