Measured Concentrations of Arsenic and Tracers of Groundwater Age, Number of VOCs, and Calibrated Carbon-14 Ages from a PSW in Albuquerque, New Mexico
| Sample Name | Sample Date | Sample Time | Number of Volatile Organic Compounds | Tritium (TU) | Tritium Uncertainty, 1-Sigma (TU) | Calculated Atmospheric Mixing Ratio of CFC-113 (pptv) | CFC-113 Uncertainty from Recharge Temp and Elevation (pptv) | Corrected 14C (percent modern Carbon) | 14C Error (percent modern Carbon) | Conventional Radiocarbon Age (years BP) | Radiocarbon Age Error, 1-sigma (years) | Calibrated 14C Piston-Flow Age1, with Range in Parentheses (years BP) | Arsenic (mg/L) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| June 2007 | June 7, 2007 | 1400 | 1 | 2.35 | 0.09 | 5.4 | 0.5 | 44 | 0.3 | 6582 | 63 | 7480 (7340–7580) | 11.9 |
| DD, 115 | December 4, 2007 | 1200 | 0 | 0.54 | 0.09 | 0.1 | 0.0 | 22 | 0.2 | 12,110 | 25 | 13,950 (13,810–14,090) | 18.1 |
| DD, 133 | December 4, 2007 | 1400 | 0 | 0.64 | 0.09 | 0.5 | 0.0 | 22 | 0.2 | 12,286 | 30 | 14,160 (13,980–14,830) | 18.3 |
| DD, 151 | December 4, 2007 | 1600 | 0 | 0.77 | 0.09 | 10.5 | 0.9 | 25 | 0.2 | 11,006 | 30 | 12,870 (12,700–13,070) | 16.8 |
| DD, 176 | December 4, 2007 | 1700 | 0 | 0.14 | 0.09 | 3.6 | 0.3 | 12 | 0.2 | 17,211 | 62 | 20,410 (20,160–20,980) | 17.8 |
| DD, 241 | December 5, 2007 | 1300 | 0 | 0.06 | 0.09 | 0.3 | 0.0 | 10 | 0.2 | 18,695 | 83 | 22,310 (22,070–22,510) | 23.3 |
| DD, WH | December 5, 2007 | 1500 | 0 | 0.70 | 0.09 | 0.3 | 0.0 | 24 | 0.2 | 11,244 | 49 | 13,150 (12,960–13,290) | 18.4 |
| November 2008 | November 10, 2008 | 930 | 1 | 0.96 | 0.09 | 0.6 | 0.1 | 31 | 0.2 | 9298 | 48 | 10,500 (10,300–10,650) | 16.5 |
| 09TS1 | May 15, 2009 | 1900 | 2 | 1.93 | 0.09 | 0.8 | 0.1 | 42 | 0.1 | 7020 | 44 | 7860 (7750–7950) | 12.8 |
| 09TS2 | May 16, 2009 | 810 | 3 | 2.03 | 0.09 | 1.2 | 0.1 | 42 | 0.1 | 7056 | 44 | 7860 (7750–7950) | 12.2 |
| 09TS3 | May 16, 2009 | 1840 | 2 | 1.82 | 0.09 | 1.7 | 0.1 | 42 | 0.1 | 7056 | 44 | 7860 (7750–7950) | 12.3 |
| 09TS4 | May 17, 2009 | 800 | 2 | 2.01 | 0.09 | 7.0 | 0.6 | 42 | 0.1 | 7056 | 44 | 7860 (7750–7950) | 12.1 |
| 09TS5 | May 17, 2009 | 1830 | 2 | 1.80 | 0.09 | 3.1 | 0.3 | 42 | 0.1 | 7056 | 43 | 7860 (7750–7950) | 12.2 |
| 09TS6 | May 18, 2009 | 745 | 1 | 2.06 | 0.09 | 1.2 | 0.1 | 41 | 0.1 | 7075 | 44 | 7900 (7800–7980) | 12.1 |
Note: mbls, meters below land surface; ug/L, micrograms per liter; TU, tritium units; pptv, parts per trillion by volume; BP, before present (1950).
1
Table 1Calibrated carbon-14 age is the age at the median probability distribution for 2-sigma error; see text for details.