US Geological Survey
The Reston Groundwater Dating Laboratory
Home
CFC
Background
FAQ
Lab
Research
Sampling
Dissolved Gases N
2
Ar CO
2
CH
4
O
2
Background
FAQ
Lab
Research
Sampling
SF
6
Background
FAQ
Lab
Research
Sampling
3
H/
3
He Noble Gases
Background
FAQ
Research
Sampling
Low-Level VOCs
Background
FAQ
Lab
Research
Sampling
Shipping+Submitting Samples
Staff and Contacts
The CFC Lab
Equipment
Chromatography
Analytical Procedures
Halocarbons Identification
Estimating CFCs in Air
Guidelines for Assignment of Apparent CFC Age
NWIS parameter and method codes