The resident in question was 650' due north of the starting line.
When Beth Rice was still managing the drag strip, she told me the roundy-round track had been granted a decibel limit of 150 thus making them "legal" for all events held inside there. Didn't mean people didn't call and complain during an event inside the track, but they were SOL.
The track brought this issue with the drag strip noise on themselves when they were pressured by NASCAR to move the track from the south to it's current location. You guys would still be racing there today if this hadn't occurred but the minimal revenue from the drag strip makes this a hard battle to fight.
I very well could be wrong, but I believe Tom Kernan & AAA are the ones leading the charge to get this problem resolved so drag racing can continue there. The strip income ($) will never be a deciding factor in California Speedway showing a profit for the year.