| Review: |
Chlorofluorocarbons (CRCs) are volatile, synthetic compounds of carbon, chlorine and fluorine, produced commercially since the 1930s, for use in refrigeration. They have been the subject of intense research because of their atmospheric ozone-depleting properties. Over the last decade a series of studies investigated potential applications of CFCs in the hydrological sciences. This guidebook brings together the results of some of these studies as they apply to the groundwater environment. It describes: the principles of CFC dating; sampling and measurement methods; interpretation and the limitations of the data, and gives a number of case studies. Methods of sample collection and analysis are included, along with new data evaluation software (on the CD-ROM) to help interpret the measured groundwater concentrations of CFCs. |