The Monterey, like Eagle Ford and Bakken, are not retorting the shale to release liquid. The are producing the liquid already released from the shale via geological process. The vast majority of hydrocarbons is still locked in the shale and requires heat to release, but the 2~5% that is already released is in the billions of barrels.
And again I suggest to you that California oil production is well known and has been hampered consistently over the last half century. People have blocked expansion off shore. They have block expansion in the Bakersfield area.
How many barrels have these 3 dozen rigs produced to date???