[quote=walterwhite]I’m a liberal not upraised no polo shirts not a yuppie (not young anymore) gulping wine in temecula not driving a prius, worse, riding a bicycle, concerned about the quarry. But…

how bad is this thing? should I actually be concerned?

It’s difficult to tell? Do other large population centers have quarries near them?

I value air that is breathable as I rely on the air for basic life funtions.[/quote]

Well, I cannot compare the size and scope of this project to others since I know nothing about it, but to answer part of your question there are at least two quarries that I know of in the middle of San Diego. One north of Friars Road just east of Fashion Valley, and a second in the valley that separates Mira Mesa from Miramar This one has to be at least 3 sq. mi. in area). There may be others as well, but these two do not appear to make too much of an impact on the surrounding area.