Castro Valley is an unincorporated part of Alameda County, and the Bay Area Air Quality Management District covers the county, so its asbestos notice rule applies to jobs here. That rule is the reason testing comes before removal on our jobs, because a result tells us early whether it applies to your floor.
If a renovation will remove 100 square feet or more of regulated asbestos-containing material, the owner or the contractor has to notify the Air District at least 10 working days ahead. Homes with four or fewer units can give 72 hours' notice instead by paying an extra fee.
We're based in Castro Valley and work in Hayward, San Leandro, Oakland, Dublin, Pleasanton and many other cities around it. The calls are much the same across them, such as garages with a worn-out coating, basements with old tile glued to the slab and shop floors that need a clean start.