The ITRC (Interstate Technology & Regulatory Council) has been instrumental for years in researching and discussing passive, no-purge sampling technology among other things. 
In a recent announcement they mentioned several success stories - a couple of them were for converting sites to passive, no-purge smampling. In both of these links we couldn't help but notice the sites both showed pictures of HydraSleeves as their no-purge samplers.
This first link shows details on the ITRC helping the Air Force cut costs with passive sampling.