Scientific Investigations Report 2009–5030
U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2009–5030
Table 1. Excess nitrogen gas (N2) measured in the DR2 catchment, Yakima River basin, Washington.
[Site locations are shown in figure 1. Suffix p indicates the shallowest well at each site; q, r, and s indicate increasingly deeper wells, respectively]
Site identification No. |
Concentration (milligrams per liter) |
Number of samples |
||
---|---|---|---|---|
Average | Minimum | Maximum | ||
Ground water | ||||
W20p | 0.00 | 0.00 | 0.00 | 4 |
W20q | 2.93 | 2.84 | 3.00 | 4 |
W21p | 0.24 | 0.00 | 0.50 | 4 |
W21q | 0.00 | 0.00 | 0.00 | 4 |
W21r | 0.43 | 0.00 | 0.87 | 4 |
W21s | 0.18 | 0.00 | 0.38 | 4 |
W23p | 0.86 | 0.13 | 1.60 | 4 |
W23q | 2.03 | 0.90 | 3.10 | 4 |
W24p | 0.29 | 0.22 | 0.36 | 2 |
W24q | 0.02 | 0.00 | 0.04 | 2 |
W25p | 0.35 | 0.25 | 0.45 | 2 |
W25q | 0.88 | 0.86 | 0.89 | 2 |
W30p | 0.69 | 0.42 | 0.94 | 4 |
W31p | 2.14 | 1.96 | 2.32 | 4 |
W31q | 0.00 | 0.00 | 0.00 | 4 |
W32p | 1.57 | 1.50 | 1.64 | 2 |
W32q | 0.00 | 0.00 | 0.00 | 4 |
Upstream streambed transect | ||||
W61b | 1.79 | 1.78 | 1.80 | 2 |
W61c | 2.84 | 2.80 | 2.88 | 2 |
W62b | 2.13 | 2.11 | 2.14 | 2 |
W62c | 3.19 | 3.18 | 3.20 | 2 |
W63a | 2.89 | 2.80 | 2.98 | 2 |
W63c | 2.93 | 2.89 | 2.97 | 2 |
W64a | 2.73 | 2.64 | 2.81 | 2 |
W64c | 3.25 | 3.17 | 3.34 | 2 |
Downstream streambed transect | ||||
W51a | 0.7 | 0.64 | 0.79 | 2 |
W51c | 1.7 | 1.61 | 1.79 | 2 |
W52b | 0.9 | 0.92 | 0.92 | 1 |
W53b | 1.4 | 1.31 | 1.47 | 2 |
W54a | 6.5 | 6.25 | 6.76 | 4 |
W55b | 1.0 | 0.90 | 1.02 | 2 |