The sampling design for the ambient aerosol studies has changed over the course of the project, and detailed information regarding the sampling design is available in CEMRC annual reports starting in 1998. Samples for the aerosol/radionuclide studies have been collected using high-volume samplers (“hivols,” flow rate ~1.13 m3min-1) since the WIPP-EM program began in 1996. Three long-term aerosol sampling stations have been established; these are On Site, Near Field and Cactus Flats, and each supports a hivol sampler for collecting total suspended particulate (TSP) matter. The Near Field and Cactus Flats stations also supported a second hivol sampler for a time, and those were used for studies of PM10, particulate matter less than 10 μm aerodynamic equivalent diameter. A fourth set of samples was collected at Hobbs over a period of approximately a year and a half, but the sampling there was discontinued in April 2002.
Until the end of March 2002, both low-volume samplers (“lovols,” 10 L min-1) and Graseby-Anderson dichotomous samplers (dichots) were used for collection of aerosols for the studies of non-radioactive, inorganic constituents, specifically trace elements and selected water soluble ions. The WIPP-EM underwent major restructuring in FY 2002, and afterwards sampling for the non-radiological aerosol analytes was done using dichots exclusively. In November 2004, the collection of aerosols by dichots was discontinued. See Annual Reports for 2002 and 2005-2006
|Acknowledgment: “This material is based upon work supported by the Department of Energy Office of Environmental Management under Award Number DE-EM0002423”.|
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