  This White Paper provides a supplement to the Snowmass Summary from CF1
(Cosmic Frontier WIMP Direct Detection). It was largely prepared during the
August 2013 Community Planning Meeting and relies on information gathered from
the larger dark matter community. It is a more detailed answer to the CF1
Charge: "Identify the common infrastructure required to meet the scientific and
technical goals of dark matter direct detection." The community as a whole
recognizes that sensitive searches for WIMPs require identification,
quantification, and procurement of radiopure materials. The lack of sufficient
resources in this area is a major project risk for future experiments and can
limit scientific reach
