Demonstration/Validation of the Snap Sampler
2011
Parker, Louise | Mulherin, Nathan | Gooch, Gordon | Hall, Tommie | Scott, Constance | Clausen, Jay | Major, William | Willey, Richard | Imbrigiotta, Thomas | Gibs, Jacob | Gronstat, Donald
This research was conducted at two sites: the former Pease Air Force Base (AFB) in Portsmouth, NH and the former McClellan AFB in Sacramento, CA. There were ten sampling events at each site and each monitoring well was sampled using Snap Samplers, Regenerated Cellulose (RGC) passive diffusion samplers, and the EPA s low-flow purging and sampling protocol. Analytes included a broad range of inorganic analytes, and VOCs at the McClellan site. The Snap Sampler was able to provide samples with equivalent concentrations of VOCs, dissolved inorganic analytes, and most total inorganic analytes with the exception of total Mn and Fe. It was not clear whether elevated concentrations of Fe and Mn with the Snap Sampler were the result of 1) placing all the various types of sampling equipment in the wells, 2) poor well construction and/or degradation of metal casings and screens in some of the wells, or 3) differences in the sampling methods. The RGC sampler recovered representative concentrations of dissolved inorganics but could not be used to sample for total inorganics because of the small pore size of the membrane. Substantial cost savings (46% to 71%) were achieved with both sampling methods at these sites.
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