According to CDFA press releases, March 4th, does not mark the beginning of aerial spraying in Marin. That is however the date for chemical twist ties to be hung from "trees, plants, and fences" in that area. It was postponed from February 19th. That's according to a press release - February 8th.

According to a press release one week prior to that, press release - February 1st, the following areas are supposed to be thus "treated". Note that they are very vague - no specific town listed, just "Marin county" - Cities have been added here as a best bet after looking up the streets on MapQuest. All but one appear to be in San Rafael, the other in Greenbrae (which is in the official spray zone for August, while San Rafael officially is getting pesticided by twist ties):
Twist tie treatments will occur within approximately 200 meters of known Light Brown Apple Moth infestations. In Half Moon Bay, two areas east of Highway 1, near Highway 92, will be treated. In Pescadero, three areas will be treated along Pescadero Creek Rd., near the intersections of Stage Rd, Pomponio Truck Trail, and Dearborn Park Road.