A key concept in charter law is the Prop 39 facilities. While a school district is required to offer a charter school reasonably equivalent facilities, it is very important to not that charter schools are not required to accept these facilities. In fact, charter law explicitly calls out such a scenario in §11969.1(b), allowing "funding in lieu of facilities in an amount commensurate with local rental or lease costs for facilities reasonably equivalent to facilities of the district."
Since BCS' inception, the facilities offered to them have been portables on the Egan campus. This is nearly 2 miles walking distance from Gardner, their preferred site. Since 2008, BCS has also had a geographic preference built into their admissions that favors students from the region surrounding Gardner.
So if having a neighborhood school located within the region of their geographic admissions preference, I wonder why BCS has never asked LASD for money and found their own site in a more suitable location? The only answer I can come up with is that the location isn't really that important to them. If it were, they would have addressed it by now.
Here's a visualization I put together showing the region of their admissions preference compared with the school's actual location (and the surrounding neighborhood).