Save Our Community was founded in the movement to resist Wal-Mart's development in Rosemead, California. Now, it has become a general site for news, information, gossip, talk, and blogging about Rosemead. We also have stories about South San Gabriel, San Gabriel, Montebello, and occasionally about Pico Rivera, El Monte, South El Monte, Alhambra, Temple City, and other nearby communities. Your host is Todd. If you want a blog just sign up, get approved, and start writing. Good posts will be moved onto the home page.
Water Quality Authority business?
Well, that depends. If you are referring to the (non-Upper) San Gabriel Basin Water Quality Authority, then that agency would be interested insofar as said development would impact the regional groundwater quality and/or cleanup efforts for same. This seems a possibility, as, if this is the one I recall, it is a very large project that would not only require a Big Dig, but could create runoff issues in both construction and the final product. (Some stormwater runoff does eventually wind up in groundwater supplies, depending on the region.)
On the other hand, if you are referring to the Upper San Gabriel Valley Municipal Water District (a representative for which sits on the board of the Authority), then they would be interested due to the potential water demands that would be created by such a project.
In both cases, feedback received in such a summit could result in a "cleaner" and/or more water-conserving project, which would benefit the respective agencies.
As for your primary hypothesis, I have not seen the ads in question, but it is certainly within the realm of possibility.