Notes: Hours: Monday-Saturday, 8am-4pm. Sharps must be in a biohazard container or plastic pop bottle/milk jug marked "Used Syringes." Biohazard warning stickers are also available at Kittitas County Solid Waste office at 925 Industrial Way in Ellensburg. Carefully put each of your used syringes into the bottle. Screw the cap on tightly and put duct tape over closed bottle cap when bottle is full.