Groundwater age dating with chlorofluorocarbons
Groundwater age dating through the combination of transient tracer methods (chlorofluorocarbons (CFCs) and tritium/helium 3 (H-3/He-3)) and groundwater flow path analysis is useful for investigating groundwater travel times, flow patterns, and recharge rates, as demonstrated by this study of the homogeneous shallow, unconfined Kirkwood-Cohansey aquifer system in the southern New Jersey coastal plain.Water samples for age dating were collected from three sets of nested observation wells (10 wells) with 1.5-m-long screens located near groundwater divides.(JWR gives copies of his first novel away as the prizes for his “BFO Awards” to anyone that e-mails a letter or article to Survival Blog that includes a particularly brilliant, novel, or useful concept.Depending on context, Bolt Hold Open or Barack Hussein Obama.
Depending on context, American Wire Gauge, the system for indicating the size of electrical wire. Most standard home wiring is #12 or #14 AWG.), or Ad-hoc Working Group (on climate change)..Absorbed Glass Mat, a modern and very reliable rechargeable battery design that uses saturated absorbent glass mats instead of gelled or liquid electrolyte.Somewhat more expensive than flooded (liquid) type cells. The gas-operated weapons family invented by Mikhail Timofeyevitch Kalashnikov, a Red Army sergeant.This result may be caused by enrichment of local air in CFC-11 and CFC-12 from urban and industrial sources in the northeastern United States and minor contamination from sampling equipment.The demonstrated validity of the combined tracer-dating techniques to determine the age of water in the Kirkwood-Cohansey aquifer system indicates that groundwater flow models can be refined when apparent ages based on H-3/He-3- and CFC-dating are used as calibration targets.