CFC and SF6 
   GEOTRACES EPZT 
  PI: Rana Fine (University of Miami) 
  Contact: Jim Happell (University of Miami) 
  Version History: 
   24 July 2017 (current version) - created separate columns for bottle and underway samples to comply with GEOTRACES naming conventions 
   12 July 2017 - removed sample erroneously included in dataset (was labeled as 9497) 
   07 July 2017 - separated bottle_num into CASTNO and SAMPNO;  
      joined GEOTRACES sample numbers, event numbers, date/time, lat/lon, and depth. 
   07 Sept 2016 - original version