More Info on the Pollutants

 

Radon

Radon is a problem in many areas of the country beyond Colorado. The following map estimates radon potential and was developed by US EPA; the zones are based on (1) indoor radon measurements, (2) geology, (3) aerial radioactivity, (4) soil permeability, and (5) foundation type. Check out the map to learn more about your area.

There is also additional information available through these links...

 Radon Information (CDPHE)

 Radon Information (EPA)

Perchloroethylene

PERC is commonly used in dry cleaning, however, it can also be found in household cleaning products and is may be present in homes where vapor intrusion is not occurring. Many studies have found background levels of PERC indoors ~9 micrograms per m^3. The "action level" for the Colorado Department of Public Health and the Environment (CDPHE) is ~40 micrograms per m^3, so we are really looking for levels at or above this point. Although our high-quality testing method provides a lower detection limit of .54 micrograms per m^3, meaning we will be able to provide clear and useful data to our participants. We are hoping the low-cost method will be able to detect concentrations just below the action level, indicating when more testing should be conducted. Below are two links to more information about PERC...

 PERC information site (National Institutes of Health, NIH)

 Denver Post article on PERC contamination