U.S. Patents No. 6,481,300; No. 6,837,120; others pending
|
|
|
|
State Regulator Approval There are no states that specifically prohibit the use of any passive sampling technology. Passive Samplers (HydraSleeve and Passive Diffusion Bags) have been used in all 50 states, Canada and overseas. There are a few states that recommend either purging or low-flow methods in their guidance, but still do not exclude passive sampling. Conversely, no state gives blanket approval of passive (no-purge) sampling. Converting to passive sampling methods is typically examined on a site-by-site basis. Usually this entails an initial round of passive sampling compared with the site's previous sampling method. The resulting data is used to determine if passive sampling is appropriate for the site. HydraSleeve simplicity and low cost enables the user to conduct a comparison study easily and efficiently. If the HydraSleeve results are compared to historical data, cost savings of 50%-80% can be immediately recognized.
|
