Gravity has been involved working on the Columbia River for a number of years from Canada to the outlet into the Pacific but this last year has been eventful up North on Lake Roosevelt and the river above with our sediment and water column work we were involved with.  For the Surface Water campaign Gravity worked alongside U.R.S as both vessel support and field scientists.  We utilized 3 vessels as well as our Mobile Field Lab for processing of our proprietary PUF columns for daily use and sample processing and transfers.  We were collecting water with General Oceanics 20L Go-Flo bottles for mid depth and near bottom while using peristaltic pumps for near surface and out of the Go-Flo’s once they were on board.  Utilizing Gravity’s Ultra Trace High Volume Sampling System (HVS) helped the team reach our goal of extremely low detection levels in both the solid phase and dissolved phase.