A plastic bag ban brought Emma Vogan, right, and Molliann Jones to the Integrated Waste Management board's meeting Wednesday. The bag-covered students, members of Arroyo Grande High School's Surfrider Club, wait for a chance to address the board during the discussion of the proposed ban.   Controversial ordinance applies to most retail stores and would take effect in October, but opponents are already threatening legal action By Bob Cuddy | bcuddy@thetribunenews.com After a four-hour hearing that capped months of debate, the county’s little-known waste management board voted Wednesday evening to ban plastic shopping bags at most stores in San Luis Obispo County. Unless blocked by litigation, which has already been threatened, or a referendum, retailers will not be permitted to distribute plastic shopping bags at most supermarkets, pharmacies, convenience stores, warehouse stores or other shops. Read more here: http://www.sanluisobispo.com/2012/01/11/1903626/plastic-bag-ban-san-luis obispo.html#storylink=omni_popular#storylink=cpy