Look for archives at 0100Z (9/10). Jump to around 12-13:00 into the archive. Tower and Departure has the most that I can hear so far.
The first evidence of it on any feed that I could hear appears at 12:10 on KSFO Tower, when SKW6690 on approach says "what's going on in the hills up there?" I did a bit of transcribing in case anyone's interested:
12:31: [someone] "That's one big fire that just started."
12:33: [Tower] "Yeah, I know, we were just looking at that. That is huge!"
12:37: [someone] "Yep"
12:39: [someone, possibly SKW6143] "Yeah, something blew up."
12:41: [Tower] "Looks like it. That's not just a tree. Something [fell?] over there" [Did he think, like many others, that a plane might have gone down, even though there were no departures or go-arounds on the westbound runways at the time? Note also that the published missed approach for the Tipp Toe visual approach to 28L is to turn left heading 265, which would take an aircraft much closer to the fire site in the event of a go-around.]
[...]
13:58: [SWA274] "...looks like you got a pretty good fire up there."
14:00: [Tower] "Yeah it is. ... Looks like something might have exploded up there."
14:03: [SWA274] "Yeah, looks that way."
At about 16:50, a traffic watch aircraft informs the tower that they're heading toward the fire to the west of the airport.
On NORCAL Departure:
13:20: [68FS] "Hey what are those explosions over by SFO and the big fire? Do you guys know about that?"
13:27: [NORCAL] "That's the first I have heard about it. Near San Francisco Airport, you said? Looks like some explosions?"
13:35: [68FS] "It's huge. We can see it clear over here [I think they were near Oakland]. Six fireballs and, ah, smoke coming up. It's just to the, ah, ea-, west side."
13:45: [NORCAL] "Okay, we'll check on that, thanks."
13:47: [68FS] "I mean, it's the biggest flames I've ever seen."
Since the NORCAL Departure feed gets multiple TRACON frequencies (notably 120.9 and 135.1), you can later hear another NORCAL controller ask about the fire, and multiple aircraft confirm that they can see it. The first NORCAL controller calls back 68FS and tells him that there's a fire near "Lake Merritt" (that's what it sounds like). However, Lake Merritt is in Oakland, so he might have meant Lake Merced, which is in SF. However, the fire was actually near San Andreas Lake.
I find it interesting that, even though it wasn't a plane, the US NTSB is still in charge of the investigation, since they also investigate pipeline accidents.