Dust pollution at night by tractor on Austin and Ross

Tractor making lots of dust at 11:30 at night on 8/5/2016, many houses south of tractor working late at night?Wondering what are the latest time farmers can work? Why are they working so late and making dust at night time? ADMIN: DTSC Imperial CUPA has forwarded complaint to APCD. APCD RESPONSE: In regards to working late into the night, we have no regulation or decision making on this. In fact night farming is considered an approved conservation management practice under our Rule 806 as moisture levels are higher and winds are lighter at night time. Night farming therefore helps decreases the particulate matter emissions during day time hours. I saw the picture and several factors might take a role in terms of what was visibly seen. Dust will always look worse when you are taking a picture facing the light. If the dust is actually impacting the houses then there is an issue. As far as I know, we did not receive any complaints regarding this actions that night.