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A program is nearing completion involving the comparison of 85Kr age dating methods to conventional tritium and CFC methods. In collaboration with Drs John Cherry and Will Robertson, at the University of Waterloo, samples have been collected from an unconfined sand aquifer near Sturgeon Falls, Ontario. The site was chosen because of the very well characterized simple flow system, with nearly vertical downward flow at the sampling well site. Samples have been collected and RIMS analysis is proceeding. |
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Almost ready to roll--van being loaded for 995 mile trip to the Sturgeon Falls, Ontario site of the University of Waterloo Centre for Groundwater Research. Visible here of the 3,000 pound load are crates with gas storage cylinders, water sampling bottles, sampling/packer reels, portable generator, and the water degassing system. |
| "Base Camp" at the Lincoln Motel in Sturgeon Falls. Set-up of water degassing system in a storage shed. |
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Transporting water sampling bottles to the flow-divide piezometer nest of the WCGR field site. The low permeablity of the silty sand aquifer can be clearly seen from the high water table--it had not rained for more than a week. We very much appreciated the ATV! |
| Calibrating sampling rate for each sampler/packer set using needle valve on manifold connected to 20 l sample bottle (left). After completion of 85Kr sampling, a few 3/8" Cu tubes were filled and pinched-off for later CFC analysis (right). |
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