San Diego Registrar of Voters:

Congratulations to the Yes on A folks for what looks like a victory.
The remaining 1800 mail/provisional ballots would have to break about 60/40 to the No side to change the results (in addition to all being ruled valid). This is essentially statistically impossible unless there is some underlying difference in the population of provisional/late mail voters vs. the populations of both earlier absentee voters and voters overall (such as if a large number of the provisional voters are hired No on A campaigners from Lemon Grove, for example).
We'd say that, barring extraordinary irregularities, you can put a fork in this one.