July 2019 O&M Newsletter By Maine NewsIn State NewsPosted June 27, 20190 Comment(s) A monthly newsletter for wastewater discharge licencees, treatment facility operators, and associated persons July 2019 In this issue: Calendar Monthly Problem Set / For Practice, July Legislative Update DMR-QA Study 39 Results Due September 13 Secondary Clarifier Washout Monthly Problem Set / For Practice Answers, July