<table><tbody><tr><td></td><td>Sep-18</td><td>49.7</td><td>8.96</td><td>378</td><td>-182</td><td>-</td><td>-</td><td>116</td><td>1.1E-01</td><td>0.0</td><td>-55.58</td><td>0.03</td><td>-9.09</td><td>0.00</td><td></td><td></td><td></td></tr><tr><td></td><td>Apr-18</td><td>49</td><td>9.15</td><td>337</td><td>189</td><td>2.33</td><td>42.6</td><td>118</td><td>2.9E-01</td><td></td><td>-55.20</td><td>0.23</td><td>-9.17</td><td>0.03</td><td></td><td></td><td></td></tr><tr><td rowspan="2">PORT</td><td>Apr-18</td><td>12.1</td><td>6.17</td><td>2390</td><td>259</td><td>1.14</td><td>11</td><td>1642</td><td>2.6E-03</td><td></td><td>-54.29</td><td>0.36</td><td>-9.03</td><td>0.12</td><td rowspan="2">1061</td><td rowspan="2">26</td></tr><tr><td>Sep-18</td><td>15.9</td><td>5.98</td><td>3140</td><td>110</td><td>0.24</td><td>2.6</td><td>2102</td><td>2.1E-03</td><td>0.0</td><td>-54.83</td><td>0.08</td><td>-9.20</td><td>0.06</td></tr><tr><td rowspan="2">P-RAST</td><td>Sep-18</td><td>54.7</td><td>8.96</td><td>340</td><td>-24</td><td>0.99</td><td>18.1</td><td>105</td><td>1.0E-01</td><td>0.0</td><td>-55.19</td><td>0.03</td><td>-9.21</td><td>0.04</td><td rowspan="2">1043</td><td rowspan="2">17</td></tr><tr><td>Dec-18</td><td>54.2</td><td>9.20</td><td>340</td><td>-147</td><td>1.22</td><td>22.7</td><td>121</td><td>2.0E-01</td><td></td><td>-54.67</td><td>0.13</td><td>-9.05</td><td>0.03</td></tr><tr><td rowspan="2">P-SOA</td><td>Apr-18</td><td>50.7</td><td>9.09</td><td>339</td><td>188</td><td>0.65</td><td>11.6</td><td>131</td><td>1.7E-01</td><td></td><td>-55.02</td><td>0.55</td><td>-9.18</td><td>0.01</td><td></td><td></td><td></td></tr><tr><td>Sep-18</td><td>50.8</td><td>9.16</td><td>375</td><td>-170</td><td>0.06</td><td>1.1</td><td>133</td><td>2.0E-01</td><td>1.41</td><td>0.0</td><td>-54.71</td><td>0.49</td><td>-9.03</td><td>0.07</td><td>1047</td><td>20</td></tr><tr><td></td><td>Dec-18</td><td>49.4</td><td>9.55</td><td>340</td><td>-175</td><td>0.82</td><td>14.5</td><td>106</td><td>4.0E-01</td><td>1.39</td><td></td><td>-54.68</td><td>0.38</td><td>-8.79</td><td>0.08</td><td></td><td></td><td></td></tr><tr><td rowspan="2">PUZ-F</td><td>Apr-18</td><td>16.7</td><td>7.32</td><td>1800</td><td>213</td><td>6.30</td><td>63.4</td><td>559</td><td>1.2E-02</td><td></td><td>-38.65</td><td>0.59</td><td>-6.70</td><td>0.05</td><td></td><td></td><td></td></tr><tr><td>Sep-18</td><td>16.9</td><td>7.10</td><td>1048</td><td>18</td><td>0.12</td><td>1.2</td><td>498</td><td>6.6E-03</td><td>1.3</td><td>0.2</td><td>-38.55</td><td>0.26</td><td>-7.07</td><td>0.06</td><td>199</td><td>14</td></tr><tr><td></td><td>Dec-18</td><td>16.7</td><td>7.17</td><td>1052</td><td>-125</td><td>0.24</td><td>2.5</td><td>492</td><td>7.8E-03</td><td></td><td>-38.28</td><td>0.21</td><td>-6.92</td><td>0.04</td><td></td><td></td><td></td></tr><tr><td>PUZ-N</td><td>Apr-18</td><td>14.2</td><td>6.96</td><td>1309</td><td>214</td><td>1.60</td><td>16.2</td><td>559</td><td>5.4E-03</td><td>0.25</td><td></td><td>-38.13</td><td>0.31</td><td>-6.81</td><td>0.03</td><td>163</td><td>29</td></tr></tbody></table>
<table><tbody><tr><td></td><td>Sep-18</td><td>49.7</td><td>8.96</td><td>378</td><td>-182</td><td>-</td><td>-</td><td>116</td><td>1.1E-01</td><td>0.0</td><td>-55.58</td><td>0.03</td><td>-9.09</td><td>0.00</td><td></td><td></td><td></td></tr><tr><td></td><td>Apr-18</td><td>49</td><td>9.15</td><td>337</td><td>189</td><td>2.33</td><td>42.6</td><td>118</td><td>2.9E-01</td><td></td><td>-55.20</td><td>0.23</td><td>-9.17</td><td>0.03</td><td></td><td></td><td></td></tr><tr><td rowspan="2">PORT</td><td>Apr-18</td><td>12.1</td><td>6.17</td><td>2390</td><td>259</td><td>1.14</td><td>11</td><td>1642</td><td>2.6E-03</td><td></td><td>-54.29</td><td>0.36</td><td>-9.03</td><td>0.12</td><td rowspan="2">1061</td><td rowspan="2">26</td></tr><tr><td>Sep-18</td><td>15.9</td><td>5.98</td><td>3140</td><td>110</td><td>0.24</td><td>2.6</td><td>2102</td><td>2.1E-03</td><td>0.0</td><td>-54.83</td><td>0.08</td><td>-9.20</td><td>0.06</td></tr><tr><td rowspan="2">P-RAST</td><td>Sep-18</td><td>54.7</td><td>8.96</td><td>340</td><td>-24</td><td>0.99</td><td>18.1</td><td>105</td><td>1.0E-01</td><td>0.0</td><td>-55.19</td><td>0.03</td><td>-9.21</td><td>0.04</td><td rowspan="2">1043</td><td rowspan="2">17</td></tr><tr><td>Dec-18</td><td>54.2</td><td>9.20</td><td>340</td><td>-147</td><td>1.22</td><td>22.7</td><td>121</td><td>2.0E-01</td><td></td><td>-54.67</td><td>0.13</td><td>-9.05</td><td>0.03</td></tr><tr><td rowspan="2">P-SOA</td><td>Apr-18</td><td>50.7</td><td>9.09</td><td>339</td><td>188</td><td>0.65</td><td>11.6</td><td>131</td><td>1.7E-01</td><td></td><td>-55.02</td><td>0.55</td><td>-9.18</td><td>0.01</td><td></td><td></td><td></td></tr><tr><td>Sep-18</td><td>50.8</td><td>9.16</td><td>375</td><td>-170</td><td>0.06</td><td>1.1</td><td>133</td><td>2.0E-01</td><td>1.41</td><td>0.0</td><td>-54.71</td><td>0.49</td><td>-9.03</td><td>0.07</td><td>1047</td><td>20</td></tr><tr><td></td><td>Dec-18</td><td>49.4</td><td>9.55</td><td>340</td><td>-175</td><td>0.82</td><td>14.5</td><td>106</td><td>4.0E-01</td><td>1.39</td><td></td><td>-54.68</td><td>0.38</td><td>-8.79</td><td>0.08</td><td></td><td></td><td></td></tr><tr><td rowspan="2">PUZ-F</td><td>Apr-18</td><td>16.7</td><td>7.32</td><td>1800</td><td>213</td><td>6.30</td><td>63.4</td><td>559</td><td>1.2E-02</td><td></td><td>-38.65</td><td>0.59</td><td>-6.70</td><td>0.05</td><td></td><td></td><td></td></tr><tr><td>Sep-18</td><td>16.9</td><td>7.10</td><td>1048</td><td>18</td><td>0.12</td><td>1.2</td><td>498</td><td>6.6E-03</td><td>1.3</td><td>0.2</td><td>-38.55</td><td>0.26</td><td>-7.07</td><td>0.06</td><td>199</td><td>14</td></tr><tr><td></td><td>Dec-18</td><td>16.7</td><td>7.17</td><td>1052</td><td>-125</td><td>0.24</td><td>2.5</td><td>492</td><td>7.8E-03</td><td></td><td></td><td>-38.28</td><td>0.21</td><td>-6.92</td><td>0.04</td><td></td><td></td><td></td></tr><tr><td>PUZ-N</td><td>Apr-18</td><td>14.2</td><td>6.96</td><td>1309</td><td>214</td><td>1.60</td><td>16.2</td><td>559</td><td>5.4E-03</td><td>0.25</td><td></td><td>-38.13</td><td>0.31</td><td>-6.81</td><td>0.03</td><td>163</td><td>29</td></tr></tbody></table>
<table><caption>Table 3: Concentration of dissolved gas sampled with analytical error. Helium and excess air calculation results. (<LOD) limit of detection, (n.m) non-measured, (-) calculation not allowed due to high CO₂ degassing.</caption><tbody><tr><td></td><td>Sep-18</td><td>17.5</td><td>7.05</td><td>1592</td><td>-107</td><td>1.14</td><td>11.4</td><td>616</td><td>7.4E-03</td><td>0.29</td><td>0.0</td><td>-38.81</td><td>0.81</td><td>-7.18</td><td>0.07</td></tr><tr><td></td><td>Dec-18</td><td>15.5</td><td>6.96</td><td>1325</td><td>-119</td><td>1.49</td><td>14.9</td><td>577</td><td>5.6E-03</td><td>0.12</td><td></td><td>-38.00</td><td>0.30</td><td>-6.88</td><td>0.03</td></tr><tr><td></td><td>Apr-18</td><td>13.6</td><td>5.69</td><td>920</td><td>302</td><td>0.91</td><td>9.3</td><td>659</td><td>3.5E-04</td><td>0.11</td><td></td><td>-49.02</td><td>0.45</td><td>-8.50</td><td>0.09</td></tr><tr><td rowspan="2">S-SOT</td><td>Sep-18</td><td>13.7</td><td>5.72</td><td>910</td><td>308</td><td>0.62</td><td>6.2</td><td>580</td><td>3.2E-04</td><td>0.09</td><td>1.8</td><td>0.2</td><td>-50.28</td><td>0.22</td><td>-8.43</td><td>0.05</td><td>753</td><td>29</td></tr><tr><td>Dec-18</td><td>13.7</td><td>5.72</td><td>962</td><td>309</td><td>1.09</td><td>11.1</td><td>628</td><td>3.5E-04</td><td></td><td></td><td></td><td>-49.06</td><td>0.30</td><td>-8.43</td><td>0.09</td><td></td><td></td></tr><tr><td></td><td>Apr-18</td><td>11.7</td><td>4.96</td><td>254</td><td>281</td><td>0.75</td><td>0.7</td><td>115</td><td>1.1E-05</td><td></td><td></td><td></td><td>-49.60</td><td>0.07</td><td>-8.61</td><td>0.06</td><td></td><td></td></tr><tr><td rowspan="2">S-SUP</td><td>Sep-18</td><td>12.5</td><td>4.96</td><td>257</td><td>272</td><td>0.02</td><td>0.2</td><td>83</td><td>8.1E-06</td><td></td><td>1.2</td><td>0.2</td><td>-49.61</td><td>0.15</td><td>-8.48</td><td>0.03</td><td>780</td><td>20</td></tr><tr><td>Dec-18</td><td>12.2</td><td>4.88</td><td>255</td><td>217</td><td>0.01</td><td>0.1</td><td>98</td><td>7.9E-06</td><td></td><td></td><td></td><td>-50.01</td><td>0.13</td><td>-8.54</td><td>0.07</td><td></td><td></td></tr><tr><td></td><td>Apr-18</td><td>27.7</td><td>7.51</td><td>2.89</td><td>0</td><td>2.63</td><td>34</td><td>67</td><td>2.3E-03</td><td>0.34</td><td></td><td></td><td>-55.19</td><td>0.18</td><td>-9.38</td><td>0.05</td><td></td><td></td></tr><tr><td rowspan="2">VIGN</td><td>Sep-18</td><td>28.7</td><td>8.03</td><td>2880</td><td>49</td><td>2.00</td><td>26.1</td><td>29</td><td>3.3E-03</td><td>1.56</td><td></td><td></td><td>-51.63</td><td>0.19</td><td>-8.77</td><td>0.11</td><td>876</td><td>103</td></tr><tr><td>Dec-18</td><td>28</td><td>7.47</td><td>2870</td><td>-20</td><td>2.57</td><td>33.5</td><td>110</td><td>3.4E-03</td><td></td><td></td><td></td><td>-52.00</td><td>0.32</td><td>-8.80</td><td>0.07</td><td></td><td></td></tr></tbody></table>
<table><caption>Table 3: Concentration of dissolved gas sampled with analytical error. Helium and excess air calculation results. (<LOD) limit of detection, (n.m) non-measured, (-) calculation not allowed due to high CO₂ degassing.</caption><tbody><tr><td></td><td>Sep-18</td><td>17.5</td><td>7.05</td><td>1592</td><td>-107</td><td>1.14</td><td>11.4</td><td>616</td><td>7.4E-03</td><td>0.29</td><td>0.0</td><td>-38.81</td><td>0.81</td><td>-7.18</td><td>0.07</td></tr><tr><td></td><td>Dec-18</td><td>15.5</td><td>6.96</td><td>1325</td><td>-119</td><td>1.49</td><td>14.9</td><td>577</td><td>5.6E-03</td><td>0.12</td><td></td><td>-38.00</td><td>0.30</td><td>-6.88</td><td>0.03</td></tr><tr><td></td><td>Apr-18</td><td>13.6</td><td>5.69</td><td>920</td><td>302</td><td>0.91</td><td>9.3</td><td>659</td><td>3.5E-04</td><td>0.11</td><td></td><td>-49.02</td><td>0.45</td><td>-8.50</td><td>0.09</td></tr><tr><td rowspan="2">S-SOT</td><td>Sep-18</td><td>13.7</td><td>5.72</td><td>910</td><td>308</td><td>0.62</td><td>6.2</td><td>580</td><td>3.2E-04</td><td>0.09</td><td>1.8</td><td>0.2</td><td>-50.28</td><td>0.22</td><td>-8.43</td><td>0.05</td><td>753</td><td>29</td></tr><tr><td>Dec-18</td><td>13.7</td><td>5.72</td><td>962</td><td>309</td><td>1.09</td><td>11.1</td><td>628</td><td>3.5E-04</td><td></td><td></td><td></td><td>-49.06</td><td>0.30</td><td>-8.43</td><td>0.09</td><td></td><td></td></tr><tr><td></td><td>Apr-18</td><td>11.7</td><td>4.96</td><td>254</td><td>281</td><td>0.75</td><td>0.7</td><td>115</td><td>1.1E-05</td><td></td><td></td><td></td><td>-49.60</td><td>0.07</td><td>-8.61</td><td>0.06</td><td></td><td></td></tr><tr><td rowspan="2">S-SUP</td><td>Sep-18</td><td>12.5</td><td>4.96</td><td>257</td><td>272</td><td>0.02</td><td>0.2</td><td>83</td><td>8.1E-06</td><td></td><td>1.2</td><td>0.2</td><td>-49.61</td><td>0.15</td><td>-8.48</td><td>0.03</td><td>780</td><td>20</td></tr><tr><td>Dec-18</td><td>12.2</td><td>4.88</td><td>255</td><td>217</td><td>0.01</td><td>0.1</td><td>98</td><td>7.9E-06</td><td></td><td></td><td></td><td>-50.01</td><td>0.13</td><td>-8.54</td><td>0.07</td><td></td><td></td></tr><tr><td></td><td>Apr-18</td><td>27.7</td><td>7.51</td><td>2.89</td><td>0</td><td>2.63</td><td>34</td><td>67</td><td>2.3E-03</td><td>0.34</td><td></td><td></td><td>-55.19</td><td>0.18</td><td>-9.38</td><td>0.05</td><td></td><td></td></tr><tr><td rowspan="2">VIGN</td><td>Sep-18</td><td>28.7</td><td>8.03</td><td>2880</td><td>49</td><td>2.00</td><td>26.1</td><td>29</td><td>3.3E-03</td><td>1.56</td><td></td><td></td><td>-51.63</td><td>0.19</td><td>-8.77</td><td>0.11</td><td>876</td><td>103</td></tr><tr><td>Dec-18</td><td>28</td><td>7.47</td><td>2870</td><td>-20</td><td>2.57</td><td>33.5</td><td>110</td><td>3.4E-03</td><td></td><td></td><td></td><td>-52.00</td><td>0.32</td><td>-8.80</td><td>0.07</td><td></td><td></td></tr></tbody></table>
<table><thead><tr><th rowspan="2">SPRING CODE</th><th rowspan="2">DATE</th><th colspan="10">mol/L</th><th rowspan="2">cm³STP/g</th></tr><tr><th>CO₂</th><th>He</th><th>Ne</th><th>H₂</th><th>Ar</th><th>O₂</th><th>N₂</th><th>CH₄</th><th>H₂S</th><th>N₂/Ar</th><th>He excess</th><th>Excess Air (EA)</th></tr></thead><tbody><tr><td>ACQ</td><td>Apr-18</td><td>2.94E-02</td><td>5.90E-09</td><td>1.79E-09</td><td>&lt;LOD</td><td>3.42E-06</td><td>8.84E-07</td><td>1.16E-04</td><td>6.38E-07</td><td>&lt;LOD</td><td>34</td><td>-</td><td>-</td></tr><tr><td>ACQ</td><td>Dec-18</td><td>3.60E-02</td><td>n.m</td><td>8.89E-10</td><td>&lt;LOD</td><td>4.59E-07</td><td>1.44E-06</td><td>3.84E-05</td><td>2.49E-07</td><td>&lt;LOD</td><td>84</td><td>-</td><td>-</td></tr><tr><td>S-SOT</td><td>Apr-18</td><td>5.61E-02</td><td>3.69E-09</td><td>1.17E-09</td><td>&lt;LOD</td><td>5.24E-06</td><td>3.75E-07</td><td>1.85E-04</td><td>5.33E-07</td><td>3.03E-07</td><td>35</td><td>-</td><td>-</td></tr><tr><td>S-SOT</td><td>Sept-18</td><td>3.59E-02</td><td>n.m</td><td>2.71E-09</td><td>&lt;LOD</td><td>4.91E-06</td><td>5.63E-07</td><td>1.95E-04</td><td>5.96E-07</td><td>&lt;LOD</td><td>40</td><td>-</td><td>-</td></tr><tr><td>S-SOT</td><td>Dec-18</td><td>3.89E-02</td><td>n.m</td><td>&lt;LOD</td><td>&lt;LOD</td><td>2.08E-06</td><td>1.34E-07</td><td>7.24E-05</td><td>3.10E-07</td><td>5.17E-07</td><td>35</td><td>-</td><td>-</td></tr><tr><td>S-SUP</td><td>Apr-18</td><td>5.00E-02</td><td>2.76E-10</td><td>&lt;LOD</td><td>&lt;LOD</td><td>1.64E-06</td><td>2.27E-07</td><td>5.50E-05</td><td>2.18E-08</td><td>&lt;LOD</td><td>33</td><td>-</td><td>-</td></tr><tr><td>S-SUP</td><td>Sept-18</td><td>2.30E-02</td><td>n.m</td><td>&lt;LOD</td><td>&lt;LOD</td><td>3.66E-07</td><td>3.18E-07</td><td>2.52E-05</td><td>0.00E+00</td><td>5.65E-07</td><td>69</td><td>-</td><td>-</td></tr><tr><td>S-SUP</td><td>Dec-18</td><td>3.14E-02</td><td>n.m</td><td>8.16E-10</td><td>&lt;LOD</td><td>1.08E-06</td><td>2.41E-07</td><td>4.05E-05</td><td>9.10E-08</td><td>1.03E-06</td><td>38</td><td>-</td><td>-</td></tr><tr><td>AMPU</td><td>Apr-18</td><td>2.51E-02</td><td>3.37E-09</td><td>5.47E-09</td><td>&lt;LOD</td><td>8.40E-06</td><td>1.06E-04</td><td>2.78E-04</td><td>4.76E-08</td><td>&lt;LOD</td><td>33</td><td>-</td><td>-</td></tr><tr><td>AMPU</td><td>Sept-18</td><td>1.79E-02</td><td>n.m</td><td>1.10E-09</td><td>&lt;LOD</td><td>1.96E-06</td><td>3.36E-06</td><td>7.82E-05</td><td>2.67E-08</td><td>&lt;LOD</td><td>40</td><td>-</td><td>-</td></tr></tbody></table>
<table><thead><tr><th rowspan="2">SPRING CODE</th><th rowspan="2">DATE</th><th colspan="10">mol/L</th><th rowspan="2">cm<sup>3</sup>STP/g</th></tr><tr><th>CO<sub>2</sub></th><th>He</th><th>Ne</th><th>H<sub>2</sub></th><th>Ar</th><th>O<sub>2</sub></th><th>N<sub>2</sub></th><th>CH<sub>4</sub></th><th>H<sub>2</sub>S</th><th>N<sub>2</sub>/Ar</th><th>He excess</th><th>Excess Air (EA)</th></tr></thead><tbody><tr><td>ACQ</td><td>Apr-18</td><td>2.94E-02</td><td>5.90E-09</td><td>1.79E-09</td><td>&lt;LOD</td><td>3.42E-06</td><td>8.84E-07</td><td>1.16E-04</td><td>6.38E-07</td><td>&lt;LOD</td><td>34</td><td>-</td><td>-</td></tr><tr><td>ACQ</td><td>Dec-18</td><td>3.60E-02</td><td>n.m</td><td>8.89E-10</td><td>&lt;LOD</td><td>4.59E-07</td><td>1.44E-06</td><td>3.84E-05</td><td>2.49E-07</td><td>&lt;LOD</td><td>84</td><td>-</td><td>-</td></tr><tr><td>S-SOT</td><td>Apr-18</td><td>5.61E-02</td><td>3.69E-09</td><td>1.17E-09</td><td>&lt;LOD</td><td>5.24E-06</td><td>3.75E-07</td><td>1.85E-04</td><td>5.33E-07</td><td>3.03E-07</td><td>35</td><td>-</td><td>-</td></tr><tr><td>S-SOT</td><td>Sept-18</td><td>3.59E-02</td><td>n.m</td><td>2.71E-09</td><td>&lt;LOD</td><td>4.91E-06</td><td>5.63E-07</td><td>1.95E-04</td><td>5.96E-07</td><td>&lt;LOD</td><td>40</td><td>-</td><td>-</td></tr><tr><td>S-SOT</td><td>Dec-18</td><td>3.89E-02</td><td>n.m</td><td>&lt;LOD</td><td>&lt;LOD</td><td>2.08E-06</td><td>1.34E-07</td><td>7.24E-05</td><td>3.10E-07</td><td>5.17E-07</td><td>35</td><td>-</td><td>-</td></tr><tr><td>S-SUP</td><td>Apr-18</td><td>5.00E-02</td><td>2.76E-10</td><td>&lt;LOD</td><td>&lt;LOD</td><td>1.64E-06</td><td>2.27E-07</td><td>5.50E-05</td><td>2.18E-08</td><td>&lt;LOD</td><td>33</td><td>-</td><td>-</td></tr><tr><td>S-SUP</td><td>Sept-18</td><td>2.30E-02</td><td>n.m</td><td>&lt;LOD</td><td>&lt;LOD</td><td>3.66E-07</td><td>3.18E-07</td><td>2.52E-05</td><td>0.00E+00</td><td>5.65E-07</td><td>69</td><td>-</td><td>-</td></tr><tr><td>S-SUP</td><td>Dec-18</td><td>3.14E-02</td><td>n.m</td><td>8.16E-10</td><td>&lt;LOD</td><td>1.08E-06</td><td>2.41E-07</td><td>4.05E-05</td><td>9.10E-08</td><td>1.03E-06</td><td>38</td><td>-</td><td>-</td></tr><tr><td>AMPU</td><td>Apr-18</td><td>2.51E-02</td><td>3.37E-09</td><td>5.47E-09</td><td>&lt;LOD</td><td>8.40E-06</td><td>1.06E-04</td><td>2.78E-04</td><td>4.76E-08</td><td>&lt;LOD</td><td>33</td><td>-</td><td>-</td></tr><tr><td>AMPU</td><td>Sept-18</td><td>1.79E-02</td><td>n.m</td><td>1.10E-09</td><td>&lt;LOD</td><td>1.96E-06</td><td>3.36E-06</td><td>7.82E-05</td><td>2.67E-08</td><td>&lt;LOD</td><td>40</td><td>-</td><td>-</td></tr></tbody></table>
<table><tr><td>AMPU</td><td>Dec-18</td><td>1.99E-02</td><td>1.05E-09</td><td>3.49E-09</td><td>&lt;LOD</td><td>7.96E-06</td><td>9.51E-05</td><td>2.95E-04</td><td>3.61E-08</td><td>&lt;LOD</td><td>37</td><td>-</td><td>-</td></tr><tr><td>FONT</td><td>Apr-18</td><td>3.37E-02</td><td>1.35E-09</td><td>1.37E-09</td><td>&lt;LOD</td><td>1.25E-06</td><td>1.10E-07</td><td>4.20E-05</td><td>9.29E-07</td><td>6.77E-08</td><td>34</td><td>-</td><td>-</td></tr><tr><td>FONT</td><td>Dec-18</td><td>2.28E-02</td><td>n.m</td><td>&lt;LOD</td><td>&lt;LOD</td><td>3.22E-07</td><td>1.92E-07</td><td>1.10E-05</td><td>3.79E-07</td><td>&lt;LOD</td><td>34</td><td>-</td><td>-</td></tr><tr><td>FONT</td><td>Sept-18</td><td>1.95E-02</td><td>n.m</td><td>3.13E-10</td><td>1.84E-08</td><td>5.77E-07</td><td>1.09E-06</td><td>2.20E-05</td><td>5.32E-07</td><td>&lt;LOD</td><td>38</td><td>-</td><td>-</td></tr><tr><td>FORC</td><td>Apr-18</td><td>3.09E-02</td><td>1.26E-08</td><td>1.68E-09</td><td>&lt;LOD</td><td>1.05E-05</td><td>1.35E-07</td><td>4.17E-04</td><td>1.04E-06</td><td>&lt;LOD</td><td>40</td><td>-</td><td>-</td></tr><tr><td>FORC</td><td>Sept-18</td><td>1.93E-02</td><td>n.m</td><td>2.34E-09</td><td>&lt;LOD</td><td>6.72E-06</td><td>4.13E-07</td><td>3.01E-04</td><td>8.27E-07</td><td>&lt;LOD</td><td>45</td><td>-</td><td>-</td></tr><tr><td>FORC</td><td>Dec-18</td><td>2.49E-02</td><td>1.89E-08</td><td>3.20E-09</td><td>&lt;LOD</td><td>9.08E-06</td><td>4.60E-07</td><td>4.23E-04</td><td>1.20E-06</td><td>6.77E-08</td><td>47</td><td>-</td><td>-</td></tr><tr><td>PORT</td><td>Apr-18</td><td>4.64E-02</td><td>n.m</td><td>&lt;LOD</td><td>&lt;LOD</td><td>2.83E-06</td><td>2.13E-07</td><td>9.52E-05</td><td>1.17E-05</td><td>&lt;LOD</td><td>34</td><td>-</td><td>-</td></tr><tr><td>PORT</td><td>Sept-18</td><td>3.06E-02</td><td>n.m</td><td>&lt;LOD</td><td>&lt;LOD</td><td>8.02E-07</td><td>2.81E-06</td><td>2.80E-05</td><td>5.14E-06</td><td>&lt;LOD</td><td>35</td><td>-</td><td>-</td></tr><tr><td>PARD</td><td>Apr-18</td><td>4.45E-02</td><td>4.15E-09</td><td>2.56E-09</td><td>&lt;LOD</td><td>3.46E-06</td><td>1.82E-05</td><td>1.10E-04</td><td>1.74E-07</td><td>&lt;LOD</td><td>32</td><td>-</td><td>-</td></tr><tr><td>CALD</td><td>Apr-18</td><td>3.50E-06</td><td>2.53E-08</td><td>7.93E-09</td><td>&lt;LOD</td><td>1.72E-05</td><td>1.24E-05</td><td>5.85E-04</td><td>2.38E-07</td><td>&lt;LOD</td><td>34</td><td>5.30E-07</td><td>-1.10E-03</td></tr><tr><td>P-B</td><td>Sept-18</td><td>1.44E-06</td><td>n.m</td><td>6.29E-09</td><td>&lt;LOD</td><td>1.14E-05</td><td>1.05E-06</td><td>3.89E-04</td><td>2.55E-06</td><td>1.34E-07</td><td>34</td><td>-</td><td>-1.52E-03</td></tr><tr><td>P-B</td><td>Dec-18</td><td>2.76E-06</td><td>7.82E-07</td><td>6.09E-09</td><td>&lt;LOD</td><td>9.23E-06</td><td>2.07E-05</td><td>3.43E-04</td><td>8.70E-07</td><td>&lt;LOD</td><td>37</td><td>1.75E-05</td><td>-9.76E-04</td></tr></table>
<table>
  <tr>
    <td>AMPU</td>
    <td>Dec-18</td>
    <td>1.99E-02</td>
    <td>1.05E-09</td>
    <td>3.49E-09</td>
    <td>&lt;LOD</td>
    <td>7.96E-06</td>
    <td>9.51E-05</td>
    <td>2.95E-04</td>
    <td>3.61E-08</td>
    <td>&lt;LOD</td>
    <td>37</td>
    <td>-</td>
    <td>-</td>
  </tr>
  <tr>
    <td>FONT</td>
    <td>Apr-18</td>
    <td>3.37E-02</td>
    <td>1.35E-09</td>
    <td>1.37E-09</td>
    <td>&lt;LOD</td>
    <td>1.25E-06</td>
    <td>1.10E-07</td>
    <td>4.20E-05</td>
    <td>9.29E-07</td>
    <td>6.77E-08</td>
    <td>34</td>
    <td>-</td>
    <td>-</td>
  </tr>
  <tr>
    <td>FONT</td>
    <td>Dec-18</td>
    <td>2.28E-02</td>
    <td>n.m</td>
    <td>&lt;LOD</td>
    <td>&lt;LOD</td>
    <td>3.22E-07</td>
    <td>1.92E-07</td>
    <td>1.10E-05</td>
    <td>3.79E-07</td>
    <td>&lt;LOD</td>
    <td>34</td>
    <td>-</td>
    <td>-</td>
  </tr>
  <tr>
    <td>FONT</td>
    <td>Sept-18</td>
    <td>1.95E-02</td>
    <td>n.m</td>
    <td>3.13E-10</td>
    <td>1.84E-08</td>
    <td>5.77E-07</td>
    <td>1.09E-06</td>
    <td>2.20E-05</td>
    <td>5.32E-07</td>
    <td>&lt;LOD</td>
    <td>38</td>
    <td>-</td>
    <td>-</td>
  </tr>
  <tr>
    <td>FORC</td>
    <td>Apr-18</td>
    <td>3.09E-02</td>
    <td>1.26E-08</td>
    <td>1.68E-09</td>
    <td>&lt;LOD</td>
    <td>1.05E-05</td>
    <td>1.35E-07</td>
    <td>4.17E-04</td>
    <td>1.04E-06</td>
    <td>&lt;LOD</td>
    <td>40</td>
    <td>-</td>
    <td>-</td>
  </tr>
  <tr>
    <td>FORC</td>
    <td>Sept-18</td>
    <td>1.93E-02</td>
    <td>n.m</td>
    <td>2.34E-09</td>
    <td>&lt;LOD</td>
    <td>6.72E-06</td>
    <td>4.13E-07</td>
    <td>3.01E-04</td>
    <td>8.27E-07</td>
    <td>&lt;LOD</td>
    <td>45</td>
    <td>-</td>
    <td>-</td>
  </tr>
  <tr>
    <td>FORC</td>
    <td>Dec-18</td>
    <td>2.49E-02</td>
    <td>1.89E-08</td>
    <td>3.20E-09</td>
    <td>&lt;LOD</td>
    <td>9.08E-06</td>
    <td>4.60E-07</td>
    <td>4.23E-04</td>
    <td>1.20E-06</td>
    <td>6.77E-08</td>
    <td>47</td>
    <td>-</td>
    <td>-</td>
  </tr>
  <tr>
    <td>PORT</td>
    <td>Apr-18</td>
    <td>4.64E-02</td>
    <td>n.m</td>
    <td>&lt;LOD</td>
    <td>&lt;LOD</td>
    <td>2.83E-06</td>
    <td>2.13E-07</td>
    <td>9.52E-05</td>
    <td>1.17E-05</td>
    <td>&lt;LOD</td>
    <td>34</td>
    <td>-</td>
    <td>-</td>
  </tr>
  <tr>
    <td>PORT</td>
    <td>Sept-18</td>
    <td>3.06E-02</td>
    <td>n.m</td>
    <td>&lt;LOD</td>
    <td>&lt;LOD</td>
    <td>8.02E-07</td>
    <td>2.81E-06</td>
    <td>2.80E-05</td>
    <td>5.14E-06</td>
    <td>&lt;LOD</td>
    <td>35</td>
    <td>-</td>
    <td>-</td>
  </tr>
  <tr>
    <td>PARD</td>
    <td>Apr-18</td>
    <td>4.45E-02</td>
    <td>4.15E-09</td>
    <td>2.56E-09</td>
    <td>&lt;LOD</td>
    <td>3.46E-06</td>
    <td>1.82E-05</td>
    <td>1.10E-04</td>
    <td>1.74E-07</td>
    <td>&lt;LOD</td>
    <td>32</td>
    <td>-</td>
    <td>-</td>
  </tr>
  <tr>
    <td>CALD</td>
    <td>Apr-18</td>
    <td>3.50E-06</td>
    <td>2.53E-08</td>
    <td>7.93E-09</td>
    <td>&lt;LOD</td>
    <td>1.72E-05</td>
    <td>1.24E-05</td>
    <td>5.85E-04</td>
    <td>2.38E-07</td>
    <td>&lt;LOD</td>
    <td>34</td>
    <td>5.30E-07</td>
    <td>-1.10E-03</td>
  </tr>
  <tr>
    <td>P-B</td>
    <td>Sept-18</td>
    <td>1.44E-06</td>
    <td>n.m</td>
    <td>6.29E-09</td>
    <td>&lt;LOD</td>
    <td>1.14E-05</td>
    <td>1.05E-06</td>
    <td>3.89E-04</td>
    <td>2.55E-06</td>
    <td>1.34E-07</td>
    <td>34</td>
    <td>-</td>
    <td>-1.52E-03</td>
  </tr>
  <tr>
    <td>P-B</td>
    <td>Dec-18</td>
    <td>2.76E-06</td>
    <td>7.82E-07</td>
    <td>6.09E-09</td>
    <td>&lt;LOD</td>
    <td>9.23E-06</td>
    <td>2.07E-05</td>
    <td>3.43E-04</td>
    <td>8.70E-07</td>
    <td>&lt;LOD</td>
    <td>37</td>
    <td>1.75E-05</td>
    <td>-9.76E-04</td>
  </tr>
</table>
<table>
  <tr>
    <td>P-LAV</td>
    <td>Apr-18</td>
    <td>7.64E-05</td>
    <td>1.15E-07</td>
    <td>6.35E-09</td>
    <td>8.92E-08</td>
    <td>1.47E-05</td>
    <td>4.55E-07</td>
    <td>4.36E-04</td>
    <td>4.08E-06</td>
    <td>&lt;LOD</td>
    <td>30</td>
    <td>2.54E-06</td>
    <td>-2.43E-03</td>
  </tr>
  <tr>
    <td>P-LAV</td>
    <td>Sept-18</td>
    <td>8.30E-06</td>
    <td>n.m</td>
    <td>5.88E-09</td>
    <td>&lt;LOD</td>
    <td>1.30E-05</td>
    <td>1.18E-06</td>
    <td>4.51E-04</td>
    <td>4.33E-06</td>
    <td>1.94E-07</td>
    <td>35</td>
    <td>-</td>
    <td>-2.62E-03</td>
  </tr>
  <tr>
    <td>P-LAV</td>
    <td>Dec-18</td>
    <td>2.26E-05</td>
    <td>2.25E-07</td>
    <td>6.07E-09</td>
    <td>&lt;LOD</td>
    <td>1.19E-05</td>
    <td>9.04E-07</td>
    <td>4.00E-04</td>
    <td>3.94E-06</td>
    <td>1.09E-07</td>
    <td>34</td>
    <td>5.02E-06</td>
    <td>-1.95E-03</td>
  </tr>
  <tr>
    <td>P-SOA</td>
    <td>Apr-18</td>
    <td>2.27E-05</td>
    <td>6.79E-08</td>
    <td>8.13E-09</td>
    <td>6.58E-07</td>
    <td>1.76E-05</td>
    <td>6.63E-07</td>
    <td>5.45E-04</td>
    <td>5.01E-06</td>
    <td>&lt;LOD</td>
    <td>31</td>
    <td>1.48E-06</td>
    <td>-9.44E-04</td>
  </tr>
  <tr>
    <td>P-SOA</td>
    <td>Sept-18</td>
    <td>3.10E-06</td>
    <td>n.m</td>
    <td>5.69E-09</td>
    <td>4.55E-10</td>
    <td>1.18E-05</td>
    <td>2.25E-06</td>
    <td>4.18E-04</td>
    <td>3.79E-06</td>
    <td>6.83E-08</td>
    <td>35</td>
    <td>-</td>
    <td>-2.42E-03</td>
  </tr>
  <tr>
    <td>P-SOA</td>
    <td>Dec-18</td>
    <td>3.69E-05</td>
    <td>2.34E-07</td>
    <td>6.07E-09</td>
    <td>&lt;LOD</td>
    <td>1.22E-05</td>
    <td>6.10E-07</td>
    <td>4.14E-04</td>
    <td>4.30E-06</td>
    <td>2.29E-07</td>
    <td>34</td>
    <td>5.22E-06</td>
    <td>-2.10E-03</td>
  </tr>
  <tr>
    <td>PUZ-F</td>
    <td>Apr-18</td>
    <td>1.23E-03</td>
    <td>2.94E-08</td>
    <td>9.52E-09</td>
    <td>&lt;LOD</td>
    <td>2.01E-05</td>
    <td>2.91E-07</td>
    <td>7.53E-04</td>
    <td>9.58E-04</td>
    <td>1.42E-04</td>
    <td>38</td>
    <td>6.12E-07</td>
    <td>3.10E-04</td>
  </tr>
  <tr>
    <td>PUZ-F</td>
    <td>Sept-18</td>
    <td>8.79E-04</td>
    <td>n.m</td>
    <td>9.35E-09</td>
    <td>&lt;LOD</td>
    <td>1.63E-05</td>
    <td>9.68E-07</td>
    <td>6.97E-04</td>
    <td>8.81E-04</td>
    <td>1.50E-04</td>
    <td>43</td>
    <td>-</td>
    <td>1.28E-03</td>
  </tr>
  <tr>
    <td>PUZ-F</td>
    <td>Dec-18</td>
    <td>9.81E-04</td>
    <td>3.15E-08</td>
    <td>8.96E-09</td>
    <td>&lt;LOD</td>
    <td>1.77E-05</td>
    <td>2.67E-07</td>
    <td>7.57E-04</td>
    <td>9.15E-04</td>
    <td>1.41E-04</td>
    <td>43</td>
    <td>6.60E-07</td>
    <td>2.33E-04</td>
  </tr>
  <tr>
    <td>PUZ-N</td>
    <td>Sept-18</td>
    <td>1.06E-03</td>
    <td>n.m</td>
    <td>6.83E-09</td>
    <td>&lt;LOD</td>
    <td>1.21E-05</td>
    <td>2.40E-07</td>
    <td>4.81E-04</td>
    <td>1.93E-04</td>
    <td>1.06E-03</td>
    <td>40</td>
    <td>-</td>
    <td>-9.04E-04</td>
  </tr>
  <tr>
    <td>CAM-F</td>
    <td>Apr-18</td>
    <td>3.55E-04</td>
    <td>8.76E-09</td>
    <td>2.53E-09</td>
    <td>&lt;LOD</td>
    <td>8.91E-06</td>
    <td>3.61E-07</td>
    <td>2.51E-04</td>
    <td>1.00E-03</td>
    <td>3.12E-05</td>
    <td>28</td>
    <td>1.87E-07</td>
    <td>-6.00E-03</td>
  </tr>
  <tr>
    <td>CAM-F</td>
    <td>Sept-18</td>
    <td>2.40E-04</td>
    <td>n.m</td>
    <td>2.01E-09</td>
    <td>1.33E-08</td>
    <td>7.17E-06</td>
    <td>2.79E-07</td>
    <td>2.26E-04</td>
    <td>2.13E-03</td>
    <td>4.41E-05</td>
    <td>32</td>
    <td>-</td>
    <td>-6.24E-03</td>
  </tr>
  <tr>
    <td>CAM-F</td>
    <td>Dec-18</td>
    <td>3.10E-04</td>
    <td>9.22E-09</td>
    <td>3.80E-09</td>
    <td>2.17E-08</td>
    <td>8.28E-06</td>
    <td>2.25E-07</td>
    <td>2.84E-04</td>
    <td>1.89E-03</td>
    <td>3.71E-05</td>
    <td>34</td>
    <td>1.87E-07</td>
    <td>-3.93E-03</td>
  </tr>
</table>
<table><tr><td>P-LAV</td><td>Apr-18</td><td>7.64E-05</td><td>1.15E-07</td><td>6.35E-09</td><td>8.92E-08</td><td>1.47E-05</td><td>4.55E-07</td><td>4.36E-04</td><td>4.08E-06</td><td>&lt;LOD</td><td>30</td><td>2.54E-06</td><td>-2.43E-03</td></tr><tr><td>P-LAV</td><td>Sept-18</td><td>8.30E-06</td><td>n.m</td><td>5.88E-09</td><td>&lt;LOD</td><td>1.30E-05</td><td>1.18E-06</td><td>4.51E-04</td><td>4.33E-06</td><td>1.94E-07</td><td>35</td><td>-</td><td>-2.62E-03</td></tr><tr><td>P-LAV</td><td>Dec-18</td><td>2.26E-05</td><td>2.25E-07</td><td>6.07E-09</td><td>&lt;LOD</td><td>1.19E-05</td><td>9.04E-07</td><td>4.00E-04</td><td>3.94E-06</td><td>1.09E-07</td><td>34</td><td>5.02E-06</td><td>-1.95E-03</td></tr><tr><td>P-SOA</td><td>Apr-18</td><td>2.27E-05</td><td>6.79E-08</td><td>8.13E-09</td><td>6.58E-07</td><td>1.76E-05</td><td>6.63E-07</td><td>5.45E-04</td><td>5.01E-06</td><td>&lt;LOD</td><td>31</td><td>1.48E-06</td><td>-9.44E-04</td></tr><tr><td>P-SOA</td><td>Sept-18</td><td>3.10E-06</td><td>n.m</td><td>5.69E-09</td><td>4.55E-10</td><td>1.18E-05</td><td>2.25E-06</td><td>4.18E-04</td><td>3.79E-06</td><td>6.83E-08</td><td>35</td><td>-</td><td>-2.42E-03</td></tr><tr><td>P-SOA</td><td>Dec-18</td><td>3.69E-05</td><td>2.34E-07</td><td>6.07E-09</td><td>&lt;LOD</td><td>1.22E-05</td><td>6.10E-07</td><td>4.14E-04</td><td>4.30E-06</td><td>2.29E-07</td><td>34</td><td>5.22E-06</td><td>-2.10E-03</td></tr><tr><td>PUZ-F</td><td>Apr-18</td><td>1.23E-03</td><td>2.94E-08</td><td>9.52E-09</td><td>&lt;LOD</td><td>2.01E-05</td><td>2.91E-07</td><td>7.53E-04</td><td>9.58E-04</td><td>1.42E-04</td><td>38</td><td>6.12E-07</td><td>3.10E-04</td></tr><tr><td>PUZ-F</td><td>Sept-18</td><td>8.79E-04</td><td>n.m</td><td>9.35E-09</td><td>&lt;LOD</td><td>1.63E-05</td><td>9.68E-07</td><td>6.97E-04</td><td>8.81E-04</td><td>1.50E-04</td><td>43</td><td>-</td><td>1.28E-03</td></tr><tr><td>PUZ-F</td><td>Dec-18</td><td>9.81E-04</td><td>3.15E-08</td><td>8.96E-09</td><td>&lt;LOD</td><td>1.77E-05</td><td>2.67E-07</td><td>7.57E-04</td><td>9.15E-04</td><td>1.41E-04</td><td>43</td><td>6.60E-07</td><td>2.33E-04</td></tr><tr><td>PUZ-N</td><td>Sept-18</td><td>1.06E-03</td><td>n.m</td><td>6.83E-09</td><td>&lt;LOD</td><td>1.21E-05</td><td>2.40E-07</td><td>4.81E-04</td><td>1.93E-04</td><td>1.06E-03</td><td>40</td><td>-</td><td>-9.04E-04</td></tr><tr><td>CAM-F</td><td>Apr-18</td><td>3.55E-04</td><td>8.76E-09</td><td>2.53E-09</td><td>&lt;LOD</td><td>8.91E-06</td><td>3.61E-07</td><td>2.51E-04</td><td>1.00E-03</td><td>3.12E-05</td><td>28</td><td>1.87E-07</td><td>-6.00E-03</td></tr><tr><td>CAM-F</td><td>Sept-18</td><td>2.40E-04</td><td>n.m</td><td>2.01E-09</td><td>1.33E-08</td><td>7.17E-06</td><td>2.79E-07</td><td>2.26E-04</td><td>2.13E-03</td><td>4.41E-05</td><td>32</td><td>-</td><td>-6.24E-03</td></tr><tr><td>CAM-F</td><td>Dec-18</td><td>3.10E-04</td><td>9.22E-09</td><td>3.80E-09</td><td>2.17E-08</td><td>8.28E-06</td><td>2.25E-07</td><td>2.84E-04</td><td>1.89E-03</td><td>3.71E-05</td><td>34</td><td>1.87E-07</td><td>-3.93E-03</td></tr></table>
<table><caption>Table 4: CFC and SF₆ concentrations measured in water in pmol/L and pptv.</caption><thead><tr><th rowspan="2">SPRINGS CODE</th><th colspan="2">SF6</th><th colspan="2">CFC-12</th><th colspan="2">CFC-11</th><th colspan="2">CFC-13</th></tr><tr><th>pmol/L</th><th>pptv</th><th>pmol/L</th><th>pptv</th><th>pmol/L</th><th>pptv</th><th>pmol/L</th><th>pptv</th></tr></thead><tbody><tr><td>FORC</td><td>8.39E-04</td><td>2.75</td><td>1.23E-01</td><td>30.23</td><td>1.34</td><td>88.03</td><td>0.00E+00</td><td>-</td></tr><tr><td>S-SOT</td><td>1.65E-03</td><td>5.41</td><td>6.78E-01</td><td>166.82</td><td>3.22</td><td>211.58</td><td>5.88E-02</td><td>12.84</td></tr><tr><td>P-B</td><td>0.00E+00</td><td>-</td><td>3.14E-01</td><td>67.32</td><td>4.54</td><td>253.58</td><td>0.00E+00</td><td>-</td></tr><tr><td>P-LAV</td><td>5.83E-04</td><td>1.71</td><td>1.11E-01</td><td>23.86</td><td>2.45</td><td>137.02</td><td>2.08E-02</td><td>3.78</td></tr><tr><td>PUZ-F</td><td>0.00E+00</td><td>-</td><td>8.01E-02</td><td>19.00</td><td>2.27</td><td>143.51</td><td>8.68E-02</td><td>18.27</td></tr><tr><td>CAM-F</td><td>2.81E-04</td><td>0.89</td><td>1.95E-01</td><td>46.24</td><td>4.47</td><td>283.04</td><td>5.20E-02</td><td>10.95</td></tr><tr><td>FONT</td><td>2.64E-03</td><td>8.33</td><td>8.03E-02</td><td>19.06</td><td>2.11</td><td>133.45</td><td>2.26E-02</td><td>4.75</td></tr></tbody></table>
<table><caption>Table 4: CFC and SF₆ concentrations measured in water in pmol/L and pptv.</caption><thead><tr><th rowspan="2">SPRINGS CODE</th><th colspan="2">SF6</th><th colspan="2">CFC-12</th><th colspan="2">CFC-11</th><th colspan="2">CFC-13</th></tr><tr><th>pmol/L</th><th>pptv</th><th>pmol/L</th><th>pptv</th><th>pmol/L</th><th>pptv</th><th>pmol/L</th><th>pptv</th></tr></thead><tbody><tr><td>FORC</td><td>8.39E-04</td><td>2.75</td><td>1.23E-01</td><td>30.23</td><td>1.34</td><td>88.03</td><td>0.00E+00</td><td>-</td></tr><tr><td>S-SOT</td><td>1.65E-03</td><td>5.41</td><td>6.78E-01</td><td>166.82</td><td>3.22</td><td>211.58</td><td>5.88E-02</td><td>12.84</td></tr><tr><td>P-B</td><td>0.00E+00</td><td>-</td><td>3.14E-01</td><td>67.32</td><td>4.54</td><td>253.58</td><td>0.00E+00</td><td>-</td></tr><tr><td>P-LAV</td><td>5.83E-04</td><td>1.71</td><td>1.11E-01</td><td>23.86</td><td>2.45</td><td>137.02</td><td>2.08E-02</td><td>3.78</td></tr><tr><td>PUZ-F</td><td>0.00E+00</td><td>-</td><td>8.01E-02</td><td>19.00</td><td>2.27</td><td>143.51</td><td>8.68E-02</td><td>18.27</td></tr><tr><td>CAM-F</td><td>2.81E-04</td><td>0.89</td><td>1.95E-01</td><td>46.24</td><td>4.47</td><td>283.04</td><td>5.20E-02</td><td>10.95</td></tr><tr><td>FONT</td><td>2.64E-03</td><td>8.33</td><td>8.03E-02</td><td>19.06</td><td>2.11</td><td>133.45</td><td>2.26E-02</td><td>4.75</td></tr></tbody></table>
**Abstract**

The varied gaseous composition of thermo-mineral waters emerging in a non-active zone reflects the diversity and complexity of groundwater pathways and provides important insights into their hydrogeological behaviours. The investigated geochemical content of complex thermo-mineral springs revealed the need to use dissolved gas contents as part of a multi-tracer approach to discriminate processes, geogenic (water-gas-rock interactions), abiotic (geological confinement, flow paths) and biotic activity influencing geochemical of groundwater along regional pathways. Irrespective of the dissolved element content or the water type, examining the overall concentration of dissolved gases enables an effective delineation of regional groundwater flow paths. Using dissolved gas content further contributed to the circumvention of some analytical challenges associated with conventional isotopic or geochemical techniques, often linked to the high concentration of elements such as iron, sulfate, sulfide or other naturally occurring elements content. The primary objectives are to analyse the gas composition of individual springs, to identify the origin of these gases in the groundwater, and to use this gas composition to improve the understanding of the flow patterns contributing to the geochemical diversity observed at the surface of the groundwater. From field investigations in a geologically and structurally complex area of Eastern Corsica (France), three types of gas contents are identified: (type 1) CH₄ & H₂S-rich, (type 2) N₂-rich and (type 3) CO₂-rich. The study of these dissolved gases highlights that the wide geochemical diversity of thermo-mineral waters observed here is not only related to the mineralogical composition of the local aquifer but also involves strong and cumulative interactions along deep regional circulation pathways. This approach also reveals a common deep crustal gaseous influence characterised by N₂ production, which interacts during up flow with groundwater and then with the local metamorphic or sedimentary rock matrix. The groundwater's isotopic and geochemical contents are then altered by local lithologies encountered through both abiotic and biotic interactions. Finally, at shallow depths, phreatic groundwater can add its geochemical and isotopic footprint and dilute this complex mixture before groundwater emerges as mineral spring. This paper answers the primary objectives yet further demonstrates that using dissolved gas as a tracer of groundwater flow paths allows a deeper interpretation of surface geochemical and isotopic observations, distinguishes local from regional flow paths, and provides information about processes at the origin of groundwater diversity.

The combination of tools presented in this paper (i.e., geochemical, dissolved gas, and isotopic tools) allows the establishment of a reliable regional groundwater flow scheme for thermo-mineral waters in a non-active zone. This scheme is essential to improve thermo-mineral water management, and protection to ensure their sustainable quality in front of increasing anthropogenic and climatic pressures.
**Abstract**

The varied gaseous composition of thermo-mineral waters emerging in a non-active zone reflects the diversity and complexity of groundwater pathways and provides important insights into their hydrogeological behaviours. The investigated geochemical content of complex thermo-mineral springs revealed the need to use dissolved gas contents as part of a multi-tracer approach to discriminate processes, geogenic (water-gas-rock interactions), abiotic (geological confinement, flow paths) and biotic activity influencing geochemical of groundwater along regional pathways. Irrespective of the dissolved element content or the water type, examining the overall concentration of dissolved gases enables an effective delineation of regional groundwater flow paths. Using dissolved gas content further contributed to the circumvention of some analytical challenges associated with conventional isotopic or geochemical techniques, often linked to the high concentration of elements such as iron, sulfate, sulfide or other naturally occurring elements content. The primary objectives are to analyse the gas composition of individual springs, to identify the origin of these gases in the groundwater, and to use this gas composition to improve the understanding of the flow patterns contributing to the geochemical diversity observed at the surface of the groundwater. From field investigations in a geologically and structurally complex area of Eastern Corsica (France), three types of gas contents are identified: (type 1) CH₄ & H₂S-rich, (type 2) N₂-rich and (type 3) CO₂-rich. The study of these dissolved gases highlights that the wide geochemical diversity of thermo-mineral waters observed here is not only related to the mineralogical composition of the local aquifer but also involves strong and cumulative interactions along deep regional circulation pathways. This approach also reveals a common deep crustal gaseous influence characterised by N₂ production, which interacts during up flow with groundwater and then with the local metamorphic or sedimentary rock matrix. The groundwater's isotopic and geochemical contents are then altered by local lithologies encountered through both abiotic and biotic interactions. Finally, at shallow depths, phreatic groundwater can add its geochemical and isotopic footprint and dilute this complex mixture before groundwater emerges as mineral spring. This paper answers the primary objectives yet further demonstrates that using dissolved gas as a tracer of groundwater flow paths allows a deeper interpretation of surface geochemical and isotopic observations, distinguishes local from regional flow paths, and provides information about processes at the origin of groundwater diversity.

The combination of tools presented in this paper (i.e., geochemical, dissolved gas, and isotopic tools) allows the establishment of a reliable regional groundwater flow scheme for thermo-mineral waters in a non-active zone. This scheme is essential to improve thermo-mineral water management, and protection to ensure their sustainable quality in front of increasing anthropogenic and climatic pressures.
**Keywords**

Hydrogeology, thermo-mineral waters, water stable isotopes, water-rock interactions, dissolved gases (CO₂, CH₄, H₂S, N₂, He).

**Highlights**

* geogenic processes combined with biotic activity generate diversified mineral waters

* CO₂, N₂ and CH₄ are most widely represented dissolved gases in mineral waters

* excess air can be used as tracer of biotic processes

* complex regional mineral water flows are identified

* an improved regional hydrogeological conceptual model is proposed

**Declaration of interests**

☒ The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

☐ The authors declare the following financial interests/personal relationships which may be considered as potential competing interests:
**Keywords**

Hydrogeology, thermo-mineral waters, water stable isotopes, water-rock interactions, dissolved gases (CO₂, CH₄, H₂S, N₂, He).

**Highlights**

* geogenic processes combined with biotic activity generate diversified mineral waters

* CO₂, N₂ and CH₄ are most widely represented dissolved gases in mineral waters

* excess air can be used as tracer of biotic processes

* complex regional mineral water flows are identified

* an improved regional hydrogeological conceptual model is proposed

**Declaration of interests**

☒ The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

☐ The authors declare the following financial interests/personal relationships which may be considered as potential competing interests:
Inland station

<figure><img src="image_2.png" /></figure>

<figure><img src="image_3.png" /></figure>

<figure><img src="image_4.png" /></figure>

Lowland stations

<figure><img src="image_5.png" /></figure>

<figure><img src="image_6.png" /></figure>

GEOLOGY

NEOGENE & QUATERNARY

<figure><img src="image_7.png" /></figure>

Quaternary : alluvial deposits

<figure><img src="image_8.png" /></figure>

Miocene : conglomerates

ALPINE OROGENESIS

<figure><img src="image_9.png" /></figure>

Eocene : flyschs

<figure><img src="image_10.png" /></figure>

Undiferenciate deposits from
the continental margin

<figure><img src="image_11.png" /></figure>

Ophiolites (pillow lava,
gabbro & serpentinite)

<figure><img src="image_12.png" /></figure>

Lustrous Schists :

<figure><img src="image_13.png" /></figure>

Castagniccia unit - oceanic crust,
eclogitic facies

<figure><img src="image_14.png" /></figure>

Serra di Pigno unit - continental
crust, eclogitic facies

<figure><img src="image_15.png" /></figure>

Inzecca unit - oceanic crust,
low blueschist facies

HERCYNIAN OROGENESIS

<figure><img src="image_16.png" /></figure>

Calc-alkaline basic rocks

<figure><img src="image_17.png" /></figure>

Calc-alkaline volcanism

<figure><img src="image_18.png" /></figure>

Alkaline volcanism

<figure><img src="image_19.png" /></figure>

Calc-alkaline granitoids

<figure><img src="image_20.png" /></figure>

Precambrian : gneisses

<figure><img src="image_21.png" /></figure>

Precambrian : micaschists

<figure><img src="image_22.png" /></figure>

SYMBOLS

<figure><img src="image_23.png" /></figure>

Fault

<figure><img src="image_24.png" /></figure>

Tectonic contact

<figure><img src="image_25.png" /></figure>

River

SPRING / GAS TYPE

<figure><img src="image_26.png" /></figure>

not measured,

<figure><img src="image_27.png" /></figure>

type I,

<figure><img src="image_28.png" /></figure>

type II,

△ type III.

WATER TYPE

<figure><img src="image_29.png" /></figure>
Inland station

<figure><img src="image_4.png" /></figure>

<figure><img src="image_5.png" /></figure>

<figure><img src="image_6.png" /></figure>

Lowland stations

<figure><img src="image_7.png" /></figure>

<figure><img src="image_8.png" /></figure>

GEOLOGY

NEOGENE & QUATERNARY

<figure><img src="image_9.png" /></figure>

Quaternary : alluvial deposits

<figure><img src="image_10.png" /></figure>

Miocene : conglomerates

ALPINE OROGENESIS

<figure><img src="image_11.png" /></figure>

Eocene : flyschs

<figure><img src="image_12.png" /></figure>

Undiferenciate deposits from
the continental margin

<figure><img src="image_13.png" /></figure>

Ophiolites (pillow lava,
gabbro & serpentinite)

<figure><img src="image_14.png" /></figure>

Lustrous Schists :

<figure><img src="image_15.png" /></figure>

Castagniccia unit - oceanic crust,
eclogitic facies

<figure><img src="image_16.png" /></figure>

Serra di Pigno unit - continental crust, eclogitic facies

<figure><img src="image_17.png" /></figure>

Inzecca unit - oceanic crust,
low blueschist facies

HERCYNIAN OROGENESIS

<figure><img src="image_18.png" /></figure>

Calc-alkaline basic rocks

<figure><img src="image_19.png" /></figure>

Calc-alkaline volcanism

<figure><img src="image_20.png" /></figure>

Alkaline volcanism

<figure><img src="image_21.png" /></figure>

Calc-alkaline granitoids

<figure><img src="image_22.png" /></figure>

Precambrian : gneisses

<figure><img src="image_23.png" /></figure>

Precambrian : micaschists

<figure><img src="image_24.png" /></figure>

SYMBOLS

<figure><img src="image_25.png" /></figure>

Fault

<figure><img src="image_26.png" /></figure>

Tectonic contact

<figure><img src="image_27.png" /></figure>

River

SPRING / GAS TYPE

<figure><img src="image_28.png" /></figure>

not measured,

<figure><img src="image_29.png" /></figure>

type I,

<figure><img src="image_30.png" /></figure>

type II,

△ type III.

WATER TYPE

<figure><img src="image_31.png" /></figure>

<figure><img src="image_32.png" /></figure>
<figure><img src="image_30.png" /></figure>

<figure><img src="image_31.png" /></figure>
<figure><img src="image_33.png" /></figure>

<figure><img src="image_34.png" /></figure>
<figure><img src="image_32.png" /></figure>

<figure><img src="image_33.png" /></figure>
<figure><img src="image_35.png" /></figure>

<figure><img src="image_36.png" /></figure>
<figure><img src="image_34.png" /></figure>

<figure><img src="image_35.png" /></figure>

<figure><img src="image_36.png" /></figure>
<figure><img src="image_37.png" /></figure>

<figure><img src="image_38.png" /></figure>

<figure><img src="image_39.png" /></figure>
<figure><img src="image_37.png" /></figure>

<figure><img src="image_38.png" /></figure>

<figure><img src="image_39.png" /></figure>

<figure><img src="image_40.png" /></figure>

<figure><img src="image_41.png" /></figure>

① **Crustal influence**: enrichment in N₂, Ar, Ne & CO₂ - Type II

③ **Geogenic processes**: Influence of anoxic geological confinement on water, the very reducing aquifer conditions leads to reduce CO₂ into CH₄ and the N₂ into NH₄ - Type I

② **Thermogenic processes**: enrichment in CO₂, due to re-mobilisation of thermogenic CO₂ according to water interaction with metamorphised rocks - Type III

④ **Biotic processes**: the bacterial activity in organic matter-rich environment leads to consumption of CH₄ and sulfate production of CO₂ and H₂S - Type I
<figure><img src="image_40.png" /></figure>

<figure><img src="image_41.png" /></figure>

<figure><img src="image_42.png" /></figure>

<figure><img src="image_43.png" /></figure>

<figure><img src="image_44.png" /></figure>

① **Crustal influence**: enrichment in N₂, Ar, Ne & CO₂ - Type II

③ **Geogenic processes**: Influence of anoxic geological confinement on water, the very reducing aquifer conditions leads to reduce CO₂ into CH₄ and the N₂ into NH₄ - Type I

② **Thermogenic processes**: enrichment in CO₂, due to re-mobilisation of thermogenic CO₂ according to water interaction with metamorphised rocks - Type III

④ **Biotic processes**: the bacterial activity in organic matter-rich environment leads to consumption of CH₄ and sulfate production of CO₂ and H₂S - Type I
<figure><img src="image_42.png" /></figure>

<figure><img src="image_43.png" /></figure>
<figure><img src="image_45.png" /></figure>

<figure><img src="image_46.png" /></figure>