Lawyers for the Sweetwater Authority water agency are demanding that former authority board member Josie Calderon-Scott retract claims she made recently to Voice of San Diego that the authority knew about elevated levels of toxic industrial chemicals in its main reservoir years before alerting the public. But Calderon-Scott said she’s not backing down. And she challenged the authority to produce documents that she said would settle the issue. In a May 23 letter, lawyers for the agency’s law firm, Best, Best & Krieger, demanded that Calderon-Scott retract claims she made in a May 13 Voice newsletter that the agency knew “for years it had a PFAS [chemicals] problem in its reservoir” and that “this problem existed for a long time before [the agency] notified the public.” Those statements, the lawyers wrote, “are false and untrue, are defamatory, and create alarming confusion for residents served by the authority.”