Who do I contact regarding trash and recycling overflow, and other matters that are of immediate concern? Post author By Margaret Lo Post date January 19, 2018 Please contact Facilities customer service at 703-993-2525 if there are any immediate concerns regarding waste and recycling. ← What is single-stream/commingled recycling? Why does Mason have a multi-stream recycling system? → What is the average annual building energy use and cost at Mason?