Sounding: GSD01             Client: USGS/NPS            Date: 07-JUN-06
Location: Great Sand Dunes National Park                UTM Coord: E[m]   447887.0  N[m]  4170723.0
Project: San Luis Valley Blue Clay                      Elevation[m]:  2359.1
County: Alamosa [Colorado]

TX loop size: X[m]  38.1   Y[m]  38.1                   RX location: X[m]   0.0   Y[m]   0.0

Model    Resistivity   Thickness   Elevation
Layer     [ohm-m]         [m]         [m]
   1        248.30       44.4      2359.1
   2         48.90       33.2      2314.6
   3          7.37       15.7      2281.4
   4         11.32        --       2265.7              Fit Error[%]:  2.741

System: EM-47   Freq[Hz]: 285   Data Set Code: uh      System: EM-47   Freq[Hz]:  30   Data Set Code: hi
TX Cur[A]:  2.5   Turn Off[usec]:   2.5                TX Cur[A]:  2.5   Turn Off[usec]:   2.5
RX Moment[turns-m^2]:    31.4    Gain Setting:  4      RX Moment[turns-m^2]:    31.4    Gain Setting:  7

       Time     rhoa_obs  obs_err  mask  rhoa_cal             Time     rhoa_obs  obs_err  mask  rhoa_cal  
       [ms]     [ohm-m]     [%]          [ohm-m]              [ms]     [ohm-m]     [%]          [ohm-m]   
 1   0.00680      232.1     0.3     u      232.4        1   0.10000      100.0     0.4     u      102.5
 2   0.00890      261.9     0.1     m      235.6        2   0.12100       88.0     0.5     u       88.8
 3   0.01200      230.3     0.1     u      230.2        3   0.15100       74.9     0.5     u       75.2
 4   0.01570      216.3     0.2     u      218.6        4   0.18800       63.4     0.3     u       64.3
 5   0.02000      209.6     0.2     u      207.5        5   0.23100       55.7     0.9     u       55.8
 6   0.02610      197.0     0.2     u      195.4        6   0.29100       47.6     0.7     u       48.2
 7   0.03340      183.7     0.1     u      184.9        7   0.36500       41.7     1.0     u       42.1
 8   0.04210      172.3     0.2     u      172.6        8   0.45200       37.1     1.9     u       37.4
 9   0.05410      154.4     0.3     u      155.1        9   0.57000       32.7     2.3     u       33.3
10   0.06820      137.4     0.2     u      136.1       10   0.71200       30.1     2.4     u       30.1
11   0.08380      119.0     0.2     u      118.5       11   0.87100       27.2     3.1     u       27.6
12   0.10460      102.6     0.3     u      101.2       12   1.08000       24.5     5.4     u       25.5
13   0.13560       84.8     0.4     u       83.9       13   1.39000       23.0     6.2     u       23.4
14   0.17230       71.8     0.2     u       71.1       14   1.75000       22.7     7.0     u       21.8
15   0.21490       62.1     0.2     u       61.5       15   2.18000       21.9    15.0     u       20.6
16   0.27500       54.0     0.3     u       53.3       16   2.78000       19.6    18.1     u       19.6
17   0.34900       47.8     0.5     u       47.1       17   3.52000       18.1    16.1     u       18.8
18   0.43600       42.8     0.8     u       42.6       18   4.39000       22.4    63.2     d        -
19   0.55500       39.3     1.7     u       39.0       19   5.56000       17.4    75.3     d        -
20   0.70100       37.1     1.4     u       36.5       20   7.04000       46.1   100.0     d        -

Sounding: GSD02             Client: USGS/NPS            Date: 07-JUN-06
Location: Great Sand Dunes National Park                UTM Coord: E[m]   444289.0  N[m]  4170722.0
Project: San Luis Valley Blue Clay                      Elevation[m]:  2327.1
County: Alamosa [Colorado]

TX loop size: X[m]  38.1   Y[m]  38.1                   RX location: X[m]   0.0   Y[m]   0.0

Model    Resistivity   Thickness   Elevation
Layer     [ohm-m]         [m]         [m]
   1        170.90       24.5      2327.1
   2         68.09       36.2      2302.5
   3          6.99       51.2      2266.3
   4          4.14        --       2215.1              Fit Error[%]:  3.123

System: EM-47   Freq[Hz]: 285   Data Set Code: uh      System: EM-47   Freq[Hz]:  30   Data Set Code: hi
TX Cur[A]:  2.5   Turn Off[usec]:   2.5                TX Cur[A]:  2.5   Turn Off[usec]:   2.5
RX Moment[turns-m^2]:    31.4    Gain Setting:  3      RX Moment[turns-m^2]:    31.4    Gain Setting:  7

       Time     rhoa_obs  obs_err  mask  rhoa_cal             Time     rhoa_obs  obs_err  mask  rhoa_cal  
       [ms]     [ohm-m]     [%]          [ohm-m]              [ms]     [ohm-m]     [%]          [ohm-m]   
 1   0.00680      149.1     0.2     u      148.5        1   0.10000       69.7     0.2     u       73.0
 2   0.00890      150.0     0.1     m      140.6        2   0.12100       61.9     0.2     u       63.8
 3   0.01200      138.2     0.1     u      137.3        3   0.15100       53.5     0.3     u       54.7
 4   0.01570      133.4     0.1     u      135.2        4   0.18800       45.9     0.2     u       47.2
 5   0.02000      135.0     0.2     u      134.5        5   0.23100       40.7     0.4     u       41.5
 6   0.02610      132.7     0.1     u      133.5        6   0.29100       35.4     0.7     u       36.1
 7   0.03340      129.2     0.1     u      129.6        7   0.36500       31.0     0.9     u       31.8
 8   0.04210      123.0     0.2     u      122.1        8   0.45200       27.4     0.7     u       28.3
 9   0.05410      110.6     0.4     u      109.3        9   0.57000       24.3     1.6     u       25.1
10   0.06820       97.7     0.3     u       95.9       10   0.71200       22.0     2.1     u       22.4
11   0.08380       84.6     0.1     u       83.9       11   0.87100       20.1     1.8     u       20.2
12   0.10460       73.5     0.1     u       72.2       12   1.08000       18.2     0.6     u       18.2
13   0.13560       61.9     0.1     u       60.6       13   1.39000       16.3     2.4     u       16.1
14   0.17230       53.4     0.2     u       52.0       14   1.75000       14.8     4.6     u       14.6
15   0.21490       46.9     0.3     u       45.7       15   2.18000       13.4     3.9     u       13.3
16   0.27500       41.3     0.3     u       40.1       16   2.78000       12.1     6.9     u       12.1
17   0.34900       36.9     0.5     u       35.9       17   3.52000       11.2    16.4     u       11.2
18   0.43600       33.4     0.5     u       32.8       18   4.39000       10.8    26.7     u       10.6
19   0.55500       30.7     0.9     u       30.1       19   5.56000        9.9    23.6     u       10.0
20   0.70100       29.1     1.4     u       28.1       20   7.04000       12.1    81.2     d        -

Sounding: GSD03             Client: USGS/NPS            Date: 08-JUN-06
Location: Great Sand Dunes National Park                UTM Coord: E[m]   444942.0  N[m]  4179766.0
Project: San Luis Valley Blue Clay                      Elevation[m]:  2342.4
County: Saguache [Colorado]

TX loop size: X[m]  38.1   Y[m]  38.1                   RX location: X[m]   0.0   Y[m]   0.0

Model    Resistivity   Thickness   Elevation
Layer     [ohm-m]         [m]         [m]
   1        326.30       21.3      2342.4
   2        118.10       67.6      2321.0
   3          9.55       48.1      2253.4
   4         28.89        --       2205.3              Fit Error[%]:  3.754

System: EM-47   Freq[Hz]: 285   Data Set Code: uh      System: EM-47   Freq[Hz]:  30   Data Set Code: hi
TX Cur[A]:  2.5   Turn Off[usec]:   2.5                TX Cur[A]:  3.0   Turn Off[usec]:   2.5
RX Moment[turns-m^2]:    31.4    Gain Setting:  4      RX Moment[turns-m^2]:    31.4    Gain Setting:  7

       Time     rhoa_obs  obs_err  mask  rhoa_cal             Time     rhoa_obs  obs_err  mask  rhoa_cal  
       [ms]     [ohm-m]     [%]          [ohm-m]              [ms]     [ohm-m]     [%]          [ohm-m]   
 1   0.00680      183.5     0.1     m      216.3        1   0.10000      131.8     0.2     u      137.9
 2   0.00890      205.8     0.3     u      201.8        2   0.12100      117.7     0.6     u      120.6
 3   0.01200      191.7     0.4     u      193.2        3   0.15100       99.8     0.6     u      101.8
 4   0.01570      186.0     0.5     u      187.6        4   0.18800       82.4     0.6     u       85.5
 5   0.02000      187.6     0.5     u      185.4        5   0.23100       70.7     0.9     u       72.6
 6   0.02610      184.5     0.2     u      185.9        6   0.29100       59.1     0.8     u       60.9
 7   0.03340      185.7     0.2     u      188.2        7   0.36500       50.5     0.5     u       52.0
 8   0.04210      187.7     0.3     u      188.5        8   0.45200       44.6     1.5     u       45.5
 9   0.05410      182.8     0.3     u      183.5        9   0.57000       39.3     1.7     u       40.0
10   0.06820      178.3     0.3     u      171.7       10   0.71200       35.9     2.3     u       36.1
11   0.08380      158.5     0.3     u      156.3       11   0.87100       32.9     3.5     u       33.5
12   0.10460      141.3     0.2     u      137.1       12   1.08000       30.7     3.6     u       31.3
13   0.13560      117.6     0.2     u      114.5       13   1.39000       29.1     8.8     u       29.4
14   0.17230       97.9     0.3     u       95.8       14   1.75000       28.0     5.1     u       28.3
15   0.21490       82.3     0.5     u       81.2       15   2.18000       27.4    12.7     u       27.7
16   0.27500       69.2     0.5     u       68.0       16   2.78000       28.6    30.2     u       27.4
17   0.34900       60.0     0.7     u       58.3       17   3.52000       31.2    69.0     m       27.3
18   0.43600       53.1     0.6     u       51.6       18   4.39000       23.4    33.8     d        -
19   0.55500       48.0     1.2     u       46.4       19   5.56000       19.2    56.7     d        -
20   0.70100       45.3     1.1     u       43.0       20   7.04000       30.1   100.0     d        -

Sounding: GSD04             Client: USGS/NPS            Date: 08-JUN-06
Location: Great Sand Dunes National Park                UTM Coord: E[m]   443073.0  N[m]  4183004.0
Project: San Luis Valley Blue Clay                      Elevation[m]:  2347.0
County: Saguache [Colorado]

TX loop size: X[m]  38.1   Y[m]  38.1                   RX location: X[m]   0.0   Y[m]   0.0

Model    Resistivity   Thickness   Elevation
Layer     [ohm-m]         [m]         [m]
   1        409.70       26.2      2347.0
   2        127.00       74.6      2320.7
   3         10.74        --       2246.0              Fit Error[%]:  4.486

System: EM-47   Freq[Hz]: 285   Data Set Code: uh      System: EM-47   Freq[Hz]:  30   Data Set Code: hi
TX Cur[A]:  2.5   Turn Off[usec]:   2.5                TX Cur[A]:  2.5   Turn Off[usec]:   2.5
RX Moment[turns-m^2]:    31.4    Gain Setting:  4      RX Moment[turns-m^2]:    31.4    Gain Setting:  7

       Time     rhoa_obs  obs_err  mask  rhoa_cal             Time     rhoa_obs  obs_err  mask  rhoa_cal  
       [ms]     [ohm-m]     [%]          [ohm-m]              [ms]     [ohm-m]     [%]          [ohm-m]   
 1   0.00680      225.1     0.1     m      273.1        1   0.10000      161.5     0.8     u      169.1
 2   0.00890      253.9     0.2     u      252.0        2   0.12100      148.7     1.1     u      149.9
 3   0.01200      235.2     0.3     u      237.0        3   0.15100      131.6     0.8     u      128.8
 4   0.01570      223.3     0.3     u      226.1        4   0.18800      112.2     1.2     u      109.9
 5   0.02000      222.6     0.1     u      219.4        5   0.23100       95.8     1.6     u       94.7
 6   0.02610      215.8     0.1     u      216.2        6   0.29100       80.1     2.4     u       80.4
 7   0.03340      215.0     0.2     u      216.4        7   0.36500       67.7     3.4     u       68.8
 8   0.04210      216.0     0.0     u      216.9        8   0.45200       58.1     2.6     u       59.8
 9   0.05410      211.5     0.1     u      213.6        9   0.57000       49.2     2.6     u       51.7
10   0.06820      208.2     0.7     u      203.8       10   0.71200       44.0     4.8     u       45.4
11   0.08380      186.4     0.4     u      189.0       11   0.87100       41.0     9.0     u       40.6
12   0.10460      174.1     0.7     u      169.0       12   1.08000       38.1     6.2     u       36.4
13   0.13560      150.5     0.8     u      144.2       13   1.39000       34.3    11.2     u       32.4
14   0.17230      128.5     1.3     u      123.2       14   1.75000       30.5    14.7     u       29.4
15   0.21490      109.2     1.5     u      106.5       15   2.18000       34.3    15.6     m       27.0
16   0.27500       91.8     2.2     u       91.1       16   2.78000       34.8    37.6     m       25.0
17   0.34900       78.7     2.9     u       79.2       17   3.52000       42.0   100.0     d        -
18   0.43600       68.0     3.4     u       70.3       18   4.39000       81.5   100.0     d        -
19   0.55500       60.7     4.6     u       62.8       19   5.56000       14.4   100.0     d        -
20   0.70100       53.4     5.3     u       57.3       20   7.04000       12.1   100.0     d        -

Sounding: GSD05             Client: USGS/NPS            Date: 08-JUN-06
Location: Great Sand Dunes National Park                UTM Coord: E[m]   441449.0  N[m]  4176374.0
Project: San Luis Valley Blue Clay                      Elevation[m]:  2311.9
County: Alamosa [Colorado]

TX loop size: X[m]  38.1   Y[m]  38.1                   RX location: X[m]   0.0   Y[m]   0.0

Model    Resistivity   Thickness   Elevation
Layer     [ohm-m]         [m]         [m]
   1        132.80       28.4      2311.9
   2         49.53       30.3      2283.4
   3         10.72       39.9      2253.1
   4          5.13        --       2213.1              Fit Error[%]:  3.339

System: EM-47   Freq[Hz]: 285   Data Set Code: uh      System: EM-47   Freq[Hz]:  30   Data Set Code: hi
TX Cur[A]:  2.5   Turn Off[usec]:   2.5                TX Cur[A]:  2.5   Turn Off[usec]:   2.5
RX Moment[turns-m^2]:    31.4    Gain Setting:  3      RX Moment[turns-m^2]:    31.4    Gain Setting:  7

       Time     rhoa_obs  obs_err  mask  rhoa_cal             Time     rhoa_obs  obs_err  mask  rhoa_cal  
       [ms]     [ohm-m]     [%]          [ohm-m]              [ms]     [ohm-m]     [%]          [ohm-m]   
 1   0.00680      123.6     0.1     u      125.2        1   0.10000       62.9     0.2     u       66.2
 2   0.00890      125.0     0.3     u      121.9        2   0.12100       58.6     0.3     u       60.0
 3   0.01200      118.8     0.4     u      119.4        3   0.15100       53.0     0.4     u       53.7
 4   0.01570      114.0     0.3     u      115.9        4   0.18800       47.1     0.5     u       48.2
 5   0.02000      113.7     0.3     u      112.5        5   0.23100       42.8     0.4     u       43.6
 6   0.02610      109.0     0.2     u      108.8        6   0.29100       37.9     0.6     u       38.9
 7   0.03340      103.7     0.3     u      104.2        7   0.36500       33.6     0.8     u       34.6
 8   0.04210       98.3     0.4     u       98.2        8   0.45200       30.0     1.5     u       30.9
 9   0.05410       89.8     0.6     u       89.8        9   0.57000       26.4     1.4     u       27.4
10   0.06820       82.5     0.7     u       81.0       10   0.71200       24.1     1.3     u       24.3
11   0.08380       73.7     0.1     u       73.4       11   0.87100       21.9     1.1     u       21.9
12   0.10460       67.4     0.1     u       65.7       12   1.08000       19.7     2.2     u       19.7
13   0.13560       59.9     0.2     u       58.1       13   1.39000       17.8     4.0     u       17.5
14   0.17230       53.8     0.1     u       52.1       14   1.75000       15.8     3.3     u       15.8
15   0.21490       48.6     0.2     u       47.5       15   2.18000       14.5     7.0     u       14.5
16   0.27500       43.9     0.3     u       42.9       16   2.78000       12.9    10.4     m       13.3
17   0.34900       39.8     0.6     u       39.1       17   3.52000       13.0    17.7     m       12.4
18   0.43600       36.5     1.2     u       35.9       18   4.39000       14.2    16.3     m       11.8
19   0.55500       33.7     1.2     u       32.9       19   5.56000       10.6    18.5     m       11.3
20   0.70100       31.9     2.3     u       30.6       20   7.04000       10.3    72.6     d        -

Sounding: GSL06             Client: USGS/NPS            Date: 09-JUN-06
Location: Great Sand Dunes National Park                UTM Coord: E[m]   436634.0  N[m]  4183429.0
Project: San Luis Valley Blue Clay                      Elevation[m]:  2322.6
County: Saguache [Colorado]

TX loop size: X[m]  38.1   Y[m]  38.1                   RX location: X[m]   0.0   Y[m]   0.0

Model    Resistivity   Thickness   Elevation
Layer     [ohm-m]         [m]         [m]
   1        652.20       16.1      2322.6
   2        137.10       75.0      2306.4
   3         30.42       68.3      2231.3
   4          6.84        --       2163.0              Fit Error[%]:  5.051

System: EM-47   Freq[Hz]: 285   Data Set Code: uh      System: EM-47   Freq[Hz]:  30   Data Set Code: hi
TX Cur[A]:  2.5   Turn Off[usec]:   2.5                TX Cur[A]:  2.5   Turn Off[usec]:   2.5
RX Moment[turns-m^2]:    31.4    Gain Setting:  4      RX Moment[turns-m^2]:    31.4    Gain Setting:  7

       Time     rhoa_obs  obs_err  mask  rhoa_cal             Time     rhoa_obs  obs_err  mask  rhoa_cal  
       [ms]     [ohm-m]     [%]          [ohm-m]              [ms]     [ohm-m]     [%]          [ohm-m]   
 1   0.00680      193.3     0.3     m      237.9        1   0.10000      140.6     0.8     u      149.5
 2   0.00890      223.3     0.1     u      221.0        2   0.12100      134.9     0.6     u      139.5
 3   0.01200      211.5     0.3     u      211.5        3   0.15100      128.0     0.7     u      129.5
 4   0.01570      204.3     0.3     u      205.2        4   0.18800      119.0     1.4     u      120.6
 5   0.02000      204.5     0.0     u      201.3        5   0.23100      111.0     1.3     u      112.6
 6   0.02610      196.6     0.1     u      198.4        6   0.29100      101.9     2.3     u      103.1
 7   0.03340      193.2     0.2     u      195.7        7   0.36500       89.4     3.2     u       93.3
 8   0.04210      190.9     0.3     u      191.1        8   0.45200       80.3     3.9     u       83.2
 9   0.05410      183.4     0.5     u      182.6        9   0.57000       69.3     4.3     u       72.7
10   0.06820      177.8     0.8     u      171.7       10   0.71200       64.2     8.4     u       63.2
11   0.08380      158.6     1.7     u      160.7       11   0.87100       56.2    10.3     u       55.6
12   0.10460      153.4     1.0     u      149.1       12   1.08000       52.1    15.1     u       48.5
13   0.13560      142.4     0.2     u      137.3       13   1.39000       41.6    14.5     u       41.5
14   0.17230      133.7     0.7     u      128.5       14   1.75000       39.8    22.5     u       36.3
15   0.21490      125.4     1.1     u      121.6       15   2.18000       32.1    20.8     u       32.2
16   0.27500      116.4     1.2     u      114.3       16   2.78000       27.4    29.3     u       28.5
17   0.34900      111.5     2.4     u      106.9       17   3.52000       24.4    44.7     u       25.7
18   0.43600       99.0     2.1     u       99.3       18   4.39000       25.7    63.6     d        -
19   0.55500       91.4     1.8     u       91.2       19   5.56000       23.1    85.0     d        -
20   0.70100       80.6     7.9     u       83.6       20   7.04000       12.4    69.9     d        -

Sounding: GSL07             Client: USGS/NPS            Date: 09-JUN-06
Location: Great Sand Dunes National Park                UTM Coord: E[m]   432848.0  N[m]  4183329.0
Project: San Luis Valley Blue Clay                      Elevation[m]:  2307.3
County: Saguache [Colorado]

TX loop size: X[m]  38.1   Y[m]  38.1                   RX location: X[m]   0.0   Y[m]   0.0

Model    Resistivity   Thickness   Elevation
Layer     [ohm-m]         [m]         [m]
   1        172.30       32.0      2307.3
   2         51.61       33.4      2275.2
   3         22.91       75.8      2241.7
   4          5.10        --       2165.9              Fit Error[%]:  4.360

System: EM-47   Freq[Hz]: 285   Data Set Code: uh      System: EM-47   Freq[Hz]:  30   Data Set Code: hi
TX Cur[A]:  2.5   Turn Off[usec]:   2.5                TX Cur[A]:  2.5   Turn Off[usec]:   2.5
RX Moment[turns-m^2]:    31.4    Gain Setting:  3      RX Moment[turns-m^2]:    31.4    Gain Setting:  7

       Time     rhoa_obs  obs_err  mask  rhoa_cal             Time     rhoa_obs  obs_err  mask  rhoa_cal  
       [ms]     [ohm-m]     [%]          [ohm-m]              [ms]     [ohm-m]     [%]          [ohm-m]   
 1   0.00680      150.3     0.3     m      160.6        1   0.10000       74.2     0.6     u       79.0
 2   0.00890      158.0     0.1     u      155.7        2   0.12100       71.3     0.7     u       73.4
 3   0.01200      147.8     0.2     u      149.8        3   0.15100       67.7     0.6     u       68.0
 4   0.01570      139.9     0.2     u      141.7        4   0.18800       63.8     0.6     u       63.6
 5   0.02000      135.7     0.2     u      133.7        5   0.23100       60.8     1.0     u       60.3
 6   0.02610      126.1     0.1     u      125.1        6   0.29100       56.7     1.1     u       57.0
 7   0.03340      117.1     0.1     u      117.0        7   0.36500       52.5     1.4     u       53.8
 8   0.04210      109.6     0.1     u      109.3        8   0.45200       47.9     1.6     u       50.4
 9   0.05410       99.9     0.1     u      100.5        9   0.57000       44.1     3.6     u       46.3
10   0.06820       92.5     0.2     u       92.3       10   0.71200       41.2     5.2     u       41.9
11   0.08380       84.4     0.3     u       85.3       11   0.87100       38.2     6.5     u       37.9
12   0.10460       79.1     0.2     u       78.3       12   1.08000       33.7     8.7     u       33.8
13   0.13560       73.5     0.1     u       71.6       13   1.39000       30.7     6.6     u       29.4
14   0.17230       70.2     0.4     u       66.7       14   1.75000       27.2     8.7     u       26.0
15   0.21490       66.8     0.4     u       63.5       15   2.18000       24.6    13.4     u       23.3
16   0.27500       63.0     0.4     u       60.9       16   2.78000       20.8    25.1     u       20.7
17   0.34900       60.0     0.7     u       59.1       17   3.52000       18.0    27.3     u       18.8
18   0.43600       57.3     0.7     u       57.5       18   4.39000       16.6    47.1     u       17.3
19   0.55500       54.2     1.6     u       55.5       19   5.56000       12.4    38.3     d        -
20   0.70100       53.7     2.8     u       53.3       20   7.04000       14.5    65.3     d        -

Sounding: GSL08             Client: USGS/NPS            Date: 09-JUN-06
Location: Great Sand Dunes National Park                UTM Coord: E[m]   432749.0  N[m]  4180346.0
Project: San Luis Valley Blue Clay                      Elevation[m]:  2305.8
County: Saguache [Colorado]

TX loop size: X[m]  38.1   Y[m]  38.1                   RX location: X[m]   0.0   Y[m]   0.0

Model    Resistivity   Thickness   Elevation
Layer     [ohm-m]         [m]         [m]
   1        158.20       27.6      2305.8
   2         46.69       45.7      2278.1
   3         26.27       43.3      2232.4
   4          5.83        --       2189.0              Fit Error[%]:  2.979

System: EM-47   Freq[Hz]: 285   Data Set Code: uh      System: EM-47   Freq[Hz]:  30   Data Set Code: hi
TX Cur[A]:  2.5   Turn Off[usec]:   2.5                TX Cur[A]:  2.5   Turn Off[usec]:   2.5
RX Moment[turns-m^2]:    31.4    Gain Setting:  3      RX Moment[turns-m^2]:    31.4    Gain Setting:  7

       Time     rhoa_obs  obs_err  mask  rhoa_cal             Time     rhoa_obs  obs_err  mask  rhoa_cal  
       [ms]     [ohm-m]     [%]          [ohm-m]              [ms]     [ohm-m]     [%]          [ohm-m]   
 1   0.00680      142.7     0.1     u      145.6        1   0.10000       71.7     0.4     u       75.4
 2   0.00890      143.3     0.2     u      137.9        2   0.12100       71.0     0.3     u       72.7
 3   0.01200      129.0     0.3     u      129.7        3   0.15100       69.1     0.5     u       70.0
 4   0.01570      118.8     0.2     u      120.5        4   0.18800       65.9     0.8     u       67.0
 5   0.02000      112.8     0.2     u      112.1        5   0.23100       63.2     1.0     u       63.7
 6   0.02610      103.9     0.2     u      103.8        6   0.29100       57.9     1.1     u       59.0
 7   0.03340       96.4     0.2     u       97.2        7   0.36500       52.3     1.3     u       53.5
 8   0.04210       91.6     0.3     u       91.8        8   0.45200       46.5     1.5     u       48.1
 9   0.05410       86.3     0.4     u       86.4        9   0.57000       41.2     2.6     u       42.3
10   0.06820       83.6     0.6     u       82.0       10   0.71200       37.8     3.5     u       37.2
11   0.08380       79.7     0.2     u       78.5       11   0.87100       32.9     4.1     u       33.1
12   0.10460       77.4     0.1     u       75.5       12   1.08000       29.2     4.4     u       29.2
13   0.13560       74.3     0.2     u       72.7       13   1.39000       25.7     7.6     u       25.5
14   0.17230       72.5     0.2     u       70.4       14   1.75000       22.9    10.2     u       22.7
15   0.21490       69.7     0.5     u       68.0       15   2.18000       20.5    16.3     u       20.5
16   0.27500       65.4     0.3     u       64.8       16   2.78000       17.4    14.7     m       18.5
17   0.34900       61.6     0.9     u       60.7       17   3.52000       16.2    17.9     m       17.0
18   0.43600       57.5     1.1     u       56.5       18   4.39000       16.9    41.1     m       15.9
19   0.55500       52.1     0.7     u       51.9       19   5.56000       14.1    48.5     d        -
20   0.70100       49.2     1.6     u       47.9       20   7.04000       11.3    56.1     d        -

Sounding: GSL09             Client: USGS/NPS            Date: 09-JUN-06
Location: Great Sand Dunes National Park                UTM Coord: E[m]   438354.0  N[m]  4180480.0
Project: San Luis Valley Blue Clay                      Elevation[m]:  2318.0
County: Saguache [Colorado]

TX loop size: X[m]  38.1   Y[m]  38.1                   RX location: X[m]   0.0   Y[m]   0.0

Model    Resistivity   Thickness   Elevation
Layer     [ohm-m]         [m]         [m]
   1        268.50       44.7      2318.0
   2         78.30       46.8      2273.2
   3         18.63       57.0      2226.3
   4          6.69        --       2169.2              Fit Error[%]:  3.819

System: EM-47   Freq[Hz]: 285   Data Set Code: uh      System: EM-47   Freq[Hz]:  30   Data Set Code: hi
TX Cur[A]:  2.5   Turn Off[usec]:   2.5                TX Cur[A]:  2.5   Turn Off[usec]:   2.5
RX Moment[turns-m^2]:    31.4    Gain Setting:  4      RX Moment[turns-m^2]:    31.4    Gain Setting:  7

       Time     rhoa_obs  obs_err  mask  rhoa_cal             Time     rhoa_obs  obs_err  mask  rhoa_cal  
       [ms]     [ohm-m]     [%]          [ohm-m]              [ms]     [ohm-m]     [%]          [ohm-m]   
 1   0.00680      233.3     0.2     u      245.7        1   0.10000      128.7     0.7     u      135.7
 2   0.00890      266.4     0.1     u      244.4        2   0.12100      120.4     0.9     u      123.3
 3   0.01200      239.8     0.1     u      241.1        3   0.15100      109.9     1.0     u      110.9
 4   0.01570      224.0     0.2     u      230.8        4   0.18800       98.7     1.2     u      100.0
 5   0.02000      218.5     0.3     u      219.9        5   0.23100       90.4     1.4     u       91.0
 6   0.02610      207.5     0.3     u      208.3        6   0.29100       79.3     1.8     u       81.7
 7   0.03340      198.3     0.4     u      198.8        7   0.36500       71.8     2.6     u       73.0
 8   0.04210      191.4     0.3     u      189.0        8   0.45200       64.3     2.9     u       65.3
 9   0.05410      177.3     0.2     u      176.6        9   0.57000       56.9     4.9     u       57.4
10   0.06820      165.9     0.1     u      162.6       10   0.71200       49.5     6.6     u       50.4
11   0.08380      149.6     0.5     u      149.2       11   0.87100       45.2     8.2     u       44.7
12   0.10460      137.2     0.3     u      134.9       12   1.08000       39.8     9.2     u       39.5
13   0.13560      122.7     0.5     u      119.7       13   1.39000       35.0    10.3     u       34.2
14   0.17230      111.1     0.4     u      108.1       14   1.75000       30.9    15.5     u       30.2
15   0.21490      101.3     0.3     u       99.1       15   2.18000       26.7    18.3     u       27.1
16   0.27500       92.0     0.4     u       90.6       16   2.78000       23.4    26.1     u       24.3
17   0.34900       84.4     0.9     u       83.2       17   3.52000       22.6    41.4     u       22.1
18   0.43600       76.9     1.3     u       77.0       18   4.39000       21.3    62.0     d        -
19   0.55500       71.8     2.3     u       70.7       19   5.56000       28.9   100.0     d        -
20   0.70100       65.4     2.2     u       65.4       20   7.04000       22.3   100.0     d        -

Sounding: GSL10             Client: USGS/NPS            Date: 10-JUN-06
Location: Great Sand Dunes National Park                UTM Coord: E[m]   439727.0  N[m]  4170606.0
Project: San Luis Valley Blue Clay                      Elevation[m]:  2296.7
County: Alamosa [Colorado]

TX loop size: X[m]  38.1   Y[m]  38.1                   RX location: X[m]   0.0   Y[m]   0.0

Model    Resistivity   Thickness   Elevation
Layer     [ohm-m]         [m]         [m]
   1         74.36       20.6      2296.7
   2         15.79       27.1      2276.0
   3          6.50        --       2248.8              Fit Error[%]:  4.393

System: EM-47   Freq[Hz]: 285   Data Set Code: uh      System: EM-47   Freq[Hz]:  30   Data Set Code: hi
TX Cur[A]:  2.5   Turn Off[usec]:   2.5                TX Cur[A]:  2.5   Turn Off[usec]:   2.5
RX Moment[turns-m^2]:    31.4    Gain Setting:  2      RX Moment[turns-m^2]:    31.4    Gain Setting:  7

       Time     rhoa_obs  obs_err  mask  rhoa_cal             Time     rhoa_obs  obs_err  mask  rhoa_cal  
       [ms]     [ohm-m]     [%]          [ohm-m]              [ms]     [ohm-m]     [%]          [ohm-m]   
 1   0.00680       79.9     0.4     u       78.6        1   0.10000       28.9     0.5     u       30.9
 2   0.00890       74.1     0.1     u       74.0        2   0.12100       27.1     0.5     u       28.6
 3   0.01200       65.9     0.1     u       68.2        3   0.15100       25.0     0.4     u       25.9
 4   0.01570       59.7     0.2     u       61.6        4   0.18800       22.9     0.5     u       23.5
 5   0.02000       55.9     0.1     u       55.6        5   0.23100       21.1     0.5     u       21.5
 6   0.02610       51.2     0.1     u       50.0        6   0.29100       19.2     0.4     u       19.5
 7   0.03340       46.8     0.1     u       45.6        7   0.36500       17.7     0.6     u       17.7
 8   0.04210       43.7     0.1     u       42.2        8   0.45200       16.2     0.6     u       16.3
 9   0.05410       39.8     0.2     u       38.8        9   0.57000       15.0     0.9     u       14.9
10   0.06820       36.6     0.1     u       35.9       10   0.71200       14.1     1.3     u       13.9
11   0.08380       33.2     0.1     u       33.4       11   0.87100       13.1     2.2     u       13.0
12   0.10460       30.5     0.1     u       30.7       12   1.08000       12.1     3.2     u       12.2
13   0.13560       27.4     0.1     u       27.6       13   1.39000       11.1     4.4     u       11.4
14   0.17230       25.3     0.3     u       25.1       14   1.75000       10.7     7.4     u       10.9
15   0.21490       23.2     0.2     u       23.0       15   2.18000        9.9    14.8     u       10.4
16   0.27500       21.3     0.2     u       20.9       16   2.78000        9.3    13.4     m       10.0
17   0.34900       20.0     0.2     u       19.3       17   3.52000        9.1    24.2     m        9.7
18   0.43600       18.8     0.3     u       18.1       18   4.39000        9.9    51.7     m        9.6
19   0.55500       17.9     0.4     u       17.1       19   5.56000       10.4   100.0     d        -
20   0.70100       17.4     0.8     u       16.4       20   7.04000       15.8   100.0     d        -

Sounding: GSL11             Client: USGS/NPS            Date: 10-JUN-06
Location: Great Sand Dunes National Park                UTM Coord: E[m]   435143.0  N[m]  4170651.0
Project: San Luis Valley Blue Clay                      Elevation[m]:  2293.6
County: Alamosa [Colorado]

TX loop size: X[m]  38.1   Y[m]  38.1                   RX location: X[m]   0.0   Y[m]   0.0

Model    Resistivity   Thickness   Elevation
Layer     [ohm-m]         [m]         [m]
   1        237.00        5.1      2293.6
   2         28.19       40.3      2288.4
   3          9.97       29.0      2248.0
   4          5.69        --       2219.0              Fit Error[%]:  3.124

System: EM-47   Freq[Hz]: 285   Data Set Code: uh      System: EM-47   Freq[Hz]:  30   Data Set Code: hi
TX Cur[A]:  2.5   Turn Off[usec]:   2.5                TX Cur[A]:  2.5   Turn Off[usec]:   2.5
RX Moment[turns-m^2]:    31.4    Gain Setting:  1      RX Moment[turns-m^2]:    31.4    Gain Setting:  7

       Time     rhoa_obs  obs_err  mask  rhoa_cal             Time     rhoa_obs  obs_err  mask  rhoa_cal  
       [ms]     [ohm-m]     [%]          [ohm-m]              [ms]     [ohm-m]     [%]          [ohm-m]   
 1   0.00680       54.0     0.6     u       54.8        1   0.10000       30.6     0.4     u       32.4
 2   0.00890       49.9     0.2     u       48.8        2   0.12100       29.9     0.4     u       30.8
 3   0.01200       45.1     0.1     u       45.0        3   0.15100       28.5     0.4     u       29.0
 4   0.01570       42.0     0.2     u       42.4        4   0.18800       26.5     0.5     u       27.1
 5   0.02000       40.8     0.1     u       40.6        5   0.23100       24.9     0.4     u       25.3
 6   0.02610       39.0     0.1     u       39.2        6   0.29100       22.8     0.4     u       23.3
 7   0.03340       37.8     0.2     u       38.2        7   0.36500       20.9     0.5     u       21.3
 8   0.04210       37.4     0.1     u       37.4        8   0.45200       19.2     0.7     u       19.6
 9   0.05410       36.4     0.2     u       36.3        9   0.57000       17.5     0.7     u       17.9
10   0.06820       36.0     0.1     u       35.1       10   0.71200       16.3     1.0     u       16.4
11   0.08380       34.3     0.2     u       33.8       11   0.87100       14.9     1.2     u       15.2
12   0.10460       33.2     0.2     u       32.3       12   1.08000       13.8     1.9     u       14.0
13   0.13560       31.2     0.2     u       30.4       13   1.39000       12.6     2.4     u       12.9
14   0.17230       29.3     0.2     u       28.5       14   1.75000       11.9     3.2     u       12.0
15   0.21490       27.4     0.1     u       26.8       15   2.18000       11.2     5.5     u       11.3
16   0.27500       25.5     0.2     u       25.0       16   2.78000       10.9     8.4     u       10.7
17   0.34900       23.9     0.4     u       23.4       17   3.52000       10.6    13.7     u       10.2
18   0.43600       22.4     0.3     u       22.0       18   4.39000        9.8    16.4     u        9.9
19   0.55500       21.2     0.6     u       20.7       19   5.56000       13.1    40.7     d        -
20   0.70100       20.4     1.3     u       19.8       20   7.04000       11.0    44.7     d        -

Sounding: GSL12             Client: USGS/NPS            Date: 10-JUN-06
Location: Great Sand Dunes National Park                UTM Coord: E[m]   434360.0  N[m]  4176318.0
Project: San Luis Valley Blue Clay                      Elevation[m]:  2295.8
County: Alamosa [Colorado]

TX loop size: X[m]  38.1   Y[m]  38.1                   RX location: X[m]   0.0   Y[m]   0.0

Model    Resistivity   Thickness   Elevation
Layer     [ohm-m]         [m]         [m]
   1        682.00       12.4      2295.8
   2         43.59       47.9      2283.3
   3         14.58       28.8      2235.3
   4          7.23        --       2206.5              Fit Error[%]:  2.643

System: EM-47   Freq[Hz]: 315   Data Set Code: uh      System: EM-47   Freq[Hz]:  30   Data Set Code: hi
TX Cur[A]:  2.5   Turn Off[usec]:   2.5                TX Cur[A]:  2.5   Turn Off[usec]:   2.5
RX Moment[turns-m^2]:    31.4    Gain Setting:  3      RX Moment[turns-m^2]:    31.4    Gain Setting:  7

       Time     rhoa_obs  obs_err  mask  rhoa_cal             Time     rhoa_obs  obs_err  mask  rhoa_cal  
       [ms]     [ohm-m]     [%]          [ohm-m]              [ms]     [ohm-m]     [%]          [ohm-m]   
 1   0.00680      117.5     0.1     u      119.6        1   0.10000       55.8     0.5     u       58.4
 2   0.00890      107.7     0.2     u      104.6        2   0.12100       53.8     0.5     u       55.1
 3   0.01200       94.3     0.2     u       94.1        3   0.15100       50.5     0.5     u       51.1
 4   0.01570       85.9     0.2     u       86.8        4   0.18800       46.3     0.8     u       47.0
 5   0.02000       81.7     0.1     u       81.5        5   0.23100       42.9     0.5     u       43.0
 6   0.02610       76.6     0.1     u       77.0        6   0.29100       38.5     0.7     u       38.7
 7   0.03340       73.3     0.2     u       73.8        7   0.36500       34.7     0.8     u       34.7
 8   0.04210       71.4     0.1     u       71.0        8   0.45200       31.3     1.3     u       31.3
 9   0.05410       68.1     0.1     u       67.9        9   0.57000       27.9     1.3     u       27.9
10   0.06820       66.1     0.1     u       64.8       10   0.71200       25.2     2.6     u       25.1
11   0.08380       62.7     0.2     u       61.8       11   0.87100       22.5     2.3     u       22.9
12   0.10460       59.5     0.2     u       58.5       12   1.08000       20.4     3.3     u       20.9
13   0.13560       55.0     0.2     u       54.3       13   1.39000       18.7     4.2     u       18.9
14   0.17230       51.0     0.1     u       50.4       14   1.75000       17.2     8.6     u       17.4
15   0.21490       47.2     0.3     u       46.8       15   2.18000       16.1     7.0     u       16.2
16   0.27500       43.3     0.2     u       42.8       16   2.78000       15.4    15.1     u       15.1
17   0.34900       39.8     0.4     u       39.2       17   3.52000       13.9    16.0     u       14.3
18   0.43600       36.8     0.6     u       36.3       18   4.39000       14.5    37.2     u       13.8
19   0.55500       34.2     0.8     u       33.7       19   5.56000       15.7    50.3     m       13.4
20   0.70100       31.6     1.0     u       31.8       20   7.04000       17.0    94.0     d        -

Sounding: GSL13             Client: USGS/NPS            Date: 11-JUN-06
Location: Great Sand Dunes National Park                UTM Coord: E[m]   420232.0  N[m]  4178294.0
Project: San Luis Valley Blue Clay                      Elevation[m]:  2302.8
County: Saguache [Colorado]

TX loop size: X[m]  38.1   Y[m]  38.1                   RX location: X[m]   0.0   Y[m]   0.0

Model    Resistivity   Thickness   Elevation
Layer     [ohm-m]         [m]         [m]
   1         84.15       15.1      2302.8
   2         28.90       24.5      2287.6
   3          9.93       59.7      2263.0
   4          8.22        --       2203.3              Fit Error[%]:  4.390

System: EM-47   Freq[Hz]: 315   Data Set Code: uh      System: EM-47   Freq[Hz]:  30   Data Set Code: hi
TX Cur[A]:  2.5   Turn Off[usec]:   2.5                TX Cur[A]:  2.5   Turn Off[usec]:   2.5
RX Moment[turns-m^2]:    31.4    Gain Setting:  2      RX Moment[turns-m^2]:    31.4    Gain Setting:  7

       Time     rhoa_obs  obs_err  mask  rhoa_cal             Time     rhoa_obs  obs_err  mask  rhoa_cal  
       [ms]     [ohm-m]     [%]          [ohm-m]              [ms]     [ohm-m]     [%]          [ohm-m]   
 1   0.00680       75.7     0.4     u       76.4        1   0.10000       32.5     0.2     u       34.0
 2   0.00890       71.2     0.2     u       69.5        2   0.12100       30.5     0.2     u       31.3
 3   0.01200       64.4     0.1     u       64.6        3   0.15100       27.9     0.2     u       28.6
 4   0.01570       59.7     0.1     u       60.8        4   0.18800       25.2     0.2     u       26.2
 5   0.02000       57.7     0.0     u       57.8        5   0.23100       23.4     0.3     u       24.2
 6   0.02610       54.3     0.1     u       54.6        6   0.29100       21.7     0.3     u       22.3
 7   0.03340       51.0     0.2     u       51.5        7   0.36500       20.3     0.4     u       20.8
 8   0.04210       48.5     0.1     u       48.0        8   0.45200       19.1     0.5     u       19.4
 9   0.05410       44.5     0.2     u       44.1        9   0.57000       18.0     0.8     u       18.2
10   0.06820       41.7     0.2     u       40.2       10   0.71200       17.6     1.1     u       17.1
11   0.08380       38.1     0.2     u       37.0       11   0.87100       16.5     1.5     u       16.2
12   0.10460       34.9     0.2     u       33.7       12   1.08000       15.6     2.6     u       15.4
13   0.13560       31.0     0.2     u       30.4       13   1.39000       14.4     3.8     u       14.5
14   0.17230       28.1     0.1     u       27.8       14   1.75000       13.8     7.2     u       13.8
15   0.21490       25.9     0.3     u       25.8       15   2.18000       12.7     8.1     u       13.3
16   0.27500       24.0     0.4     u       23.9       16   2.78000       11.9    13.0     u       12.8
17   0.34900       22.9     0.4     u       22.6       17   3.52000       12.2    20.6     u       12.5
18   0.43600       22.0     0.8     u       21.6       18   4.39000       12.6    35.2     u       12.3
19   0.55500       21.4     1.6     u       20.9       19   5.56000       13.1    64.3     u       12.2
20   0.70100       21.6     1.8     u       20.5       20   7.04000       23.5   100.0     d        -

Sounding: GSL14             Client: USGS/NPS            Date: 12-JUN-06
Location: Great Sand Dunes National Park                UTM Coord: E[m]   431247.0  N[m]  4176321.0
Project: San Luis Valley Blue Clay                      Elevation[m]:  2295.1
County: Alamosa [Colorado]

TX loop size: X[m]  38.1   Y[m]  38.1                   RX location: X[m]   0.0   Y[m]   0.0

Model    Resistivity   Thickness   Elevation
Layer     [ohm-m]         [m]         [m]
   1         56.80       32.3      2295.1
   2         28.96       39.1      2262.7
   3          6.99        --       2223.5              Fit Error[%]:  4.446

System: EM-47   Freq[Hz]: 285   Data Set Code: uh      System: EM-47   Freq[Hz]:  30   Data Set Code: hi
TX Cur[A]:  2.5   Turn Off[usec]:   2.5                TX Cur[A]:  2.5   Turn Off[usec]:   2.5
RX Moment[turns-m^2]:    31.4    Gain Setting:  1      RX Moment[turns-m^2]:    31.4    Gain Setting:  7

       Time     rhoa_obs  obs_err  mask  rhoa_cal             Time     rhoa_obs  obs_err  mask  rhoa_cal  
       [ms]     [ohm-m]     [%]          [ohm-m]              [ms]     [ohm-m]     [%]          [ohm-m]   
 1   0.00680       58.8     0.4     u       58.4        1   0.10000       45.7     0.4     u       48.9
 2   0.00890       58.9     0.0     u       57.1        2   0.12100       45.0     0.4     u       47.0
 3   0.01200       57.4     0.2     u       57.8        3   0.15100       42.9     0.3     u       44.1
 4   0.01570       56.1     0.2     u       58.0        4   0.18800       39.8     0.4     u       40.6
 5   0.02000       56.9     0.2     u       57.6        5   0.23100       36.8     0.4     u       37.2
 6   0.02610       55.8     0.1     u       56.5        6   0.29100       33.0     0.5     u       33.4
 7   0.03340       55.1     0.1     u       55.0        7   0.36500       29.6     0.7     u       29.8
 8   0.04210       55.1     0.1     u       53.7        8   0.45200       26.2     1.0     u       26.9
 9   0.05410       53.8     0.3     u       52.5        9   0.57000       23.3     0.9     u       24.0
10   0.06820       53.5     0.4     u       51.5       10   0.71200       21.3     1.8     u       21.7
11   0.08380       50.9     0.2     u       50.6       11   0.87100       19.3     2.0     u       19.9
12   0.10460       49.8     0.2     u       49.1       12   1.08000       17.6     2.4     u       18.3
13   0.13560       47.3     0.3     u       46.5       13   1.39000       16.2     2.7     u       16.6
14   0.17230       44.5     0.5     u       43.4       14   1.75000       15.1     4.5     u       15.4
15   0.21490       41.1     0.5     u       40.1       15   2.18000       14.4     6.6     u       14.4
16   0.27500       38.2     0.9     u       36.5       16   2.78000       13.6     9.2     u       13.6
17   0.34900       34.7     1.8     u       33.2       17   3.52000       13.5    13.9     u       12.9
18   0.43600       32.0     2.3     u       30.6       18   4.39000       12.9    32.0     u       12.5
19   0.55500       29.3     3.2     u       28.2       19   5.56000       14.4    40.6     d        -
20   0.70100       28.7     6.2     d        -        20   7.04000       14.4    88.5     d        -

Sounding: GSL15             Client: USGS/NPS            Date: 12-JUN-06
Location: Great Sand Dunes National Park                UTM Coord: E[m]   425480.0  N[m]  4183103.0
Project: San Luis Valley Blue Clay                      Elevation[m]:  2296.7
County: Saguache [Colorado]

TX loop size: X[m]  38.1   Y[m]  38.1                   RX location: X[m]   0.0   Y[m]   0.0

Model    Resistivity   Thickness   Elevation
Layer     [ohm-m]         [m]         [m]
   1        132.20        3.5      2296.7
   2         38.42        4.7      2293.1
   3         28.83       59.7      2288.4
   4         12.48       19.9      2228.7
   5          7.47        --       2208.8              Fit Error[%]:  5.326

System: EM-47   Freq[Hz]: 315   Data Set Code: uh      System: EM-47   Freq[Hz]:  30   Data Set Code: hi
TX Cur[A]:  2.5   Turn Off[usec]:   2.5                TX Cur[A]:  2.5   Turn Off[usec]:   2.5
RX Moment[turns-m^2]:    31.4    Gain Setting:  1      RX Moment[turns-m^2]:    31.4    Gain Setting:  7

       Time     rhoa_obs  obs_err  mask  rhoa_cal             Time     rhoa_obs  obs_err  mask  rhoa_cal  
       [ms]     [ohm-m]     [%]          [ohm-m]              [ms]     [ohm-m]     [%]          [ohm-m]   
 1   0.00680       52.6     0.2     u       51.4        1   0.10000       33.0     0.4     u       33.9
 2   0.00890       48.1     0.1     u       46.4        2   0.12100       33.1     0.4     u       33.6
 3   0.01200       42.7     0.2     u       43.2        3   0.15100       31.5     0.4     u       33.1
 4   0.01570       39.3     0.2     u       41.0        4   0.18800       40.9     0.6     m       32.4
 5   0.02000       38.0     0.2     u       39.2        5   0.23100       40.7     0.6     m       31.3
 6   0.02610       36.4     0.2     u       37.6        6   0.29100       29.1     0.5     m       29.6
 7   0.03340       36.0     0.3     u       36.4        7   0.36500       25.4     0.7     m       27.8
 8   0.04210       35.9     0.2     u       35.5        8   0.45200       30.8     1.2     m       25.8
 9   0.05410       35.4     0.4     u       34.8        9   0.57000       23.1     1.2     u       23.8
10   0.06820       36.3     0.7     u       34.4       10   0.71200       23.6     1.9     u       21.9
11   0.08380       34.0     0.1     u       34.3       11   0.87100       20.0     2.1     u       20.3
12   0.10460       37.0     0.1     u       34.1       12   1.08000       18.5     2.2     u       18.8
13   0.13560       33.1     0.1     u       33.9       13   1.39000       17.0     3.5     u       17.3
14   0.17230       41.6     0.3     m       33.5       14   1.75000       15.9     6.6     u       16.1
15   0.21490       42.7     0.7     m       32.9       15   2.18000       14.8     5.7     u       15.2
16   0.27500       33.1     0.8     m       31.8       16   2.78000       14.8    13.4     u       14.3
17   0.34900       28.3     0.7     m       30.5       17   3.52000       14.7    27.4     m       13.7
18   0.43600       37.5     2.1     m       29.3       18   4.39000       15.1    35.0     m       13.2
19   0.55500       29.2     3.2     m       28.1       19   5.56000       22.7   100.0     d        -
20   0.70100       30.9     4.5     d        -        20   7.04000       30.9   100.0     d        -

Sounding: GSL16             Client: USGS/NPS            Date: 12-JUN-06
Location: Great Sand Dunes National Park                UTM Coord: E[m]   444083.0  N[m]  4176509.0
Project: San Luis Valley Blue Clay                      Elevation[m]:  2325.6
County: Colorado

TX loop size: X[m]  38.1   Y[m]  38.1                   RX location: X[m]   0.0   Y[m]   0.0

Model    Resistivity   Thickness   Elevation
Layer     [ohm-m]         [m]         [m]
   1        477.60        9.3      2325.6
   2         91.65       62.1      2316.2
   3          6.87        --       2254.1              Fit Error[%]: 15.385

System: EM-47   Freq[Hz]: 315   Data Set Code: uh      System: EM-47   Freq[Hz]:  30   Data Set Code: hi
TX Cur[A]:  2.5   Turn Off[usec]:   2.5                TX Cur[A]:  2.5   Turn Off[usec]:   2.5
RX Moment[turns-m^2]:    31.4    Gain Setting:  3      RX Moment[turns-m^2]:    31.4    Gain Setting:  7

       Time     rhoa_obs  obs_err  mask  rhoa_cal             Time     rhoa_obs  obs_err  mask  rhoa_cal  
       [ms]     [ohm-m]     [%]          [ohm-m]              [ms]     [ohm-m]     [%]          [ohm-m]   
 1   0.00680      125.7     0.3     m      139.3        1   0.10000       84.3     2.2     u       93.3
 2   0.00890      129.2     0.3     u      130.5        2   0.12100       79.0     2.5     u       81.7
 3   0.01200      127.6     0.3     u      127.0        3   0.15100       69.6     3.8     u       69.7
 4   0.01570      127.6     0.2     u      125.6        4   0.18800       60.1     5.9     u       59.5
 5   0.02000      132.2     0.5     u      126.2        5   0.23100       50.0     6.5     u       51.4
 6   0.02610      136.2     0.4     u      128.8        6   0.29100       44.1     9.6     u       43.8
 7   0.03340      134.7     0.7     u      131.5        7   0.36500       39.8    12.1     u       37.7
 8   0.04210      134.7     1.8     u      131.9        8   0.45200       32.9    12.0     u       33.0
 9   0.05410      118.9     2.0     u      127.4        9   0.57000       30.3    20.8     u       28.8
10   0.06820      104.1     2.9     u      117.9       10   0.71200       23.1    24.2     u       25.5
11   0.08380      104.9     5.8     u      106.5       11   0.87100       23.0    32.7     u       23.0
12   0.10460       88.0     3.9     u       93.2       12   1.08000       22.3    49.0     u       20.7
13   0.13560       81.4     5.5     u       78.5       13   1.39000       17.9    32.7     u       18.6
14   0.17230       72.9     6.5     u       66.9       14   1.75000       18.3    46.0     u       17.0
15   0.21490       52.4    18.7     u       58.0       15   2.18000       12.6    69.9     u       15.8
16   0.27500       54.3    31.9     u       49.9       16   2.78000       13.3    93.4     u       14.7
17   0.34900       45.1    44.8     u       43.8       17   3.52000       15.1   100.0     u       13.9
18   0.43600       38.2    55.5     u       39.2       18   4.39000       28.9   100.0     d        -
19   0.55500       51.9   100.0     u       35.4       19   5.56000       13.7   100.0     m       12.9
20   0.70100       28.7    55.2     u       32.7       20   7.04000       52.0   100.0     d        -

Sounding: GSL17             Client: USGS/NPS            Date: 12-JUN-06
Location: Great Sand Dunes National Park                UTM Coord: E[m]   444403.0  N[m]  4180568.0
Project: San Luis Valley Blue Clay                      Elevation[m]:  2337.8
County: Saguache [Colorado]

TX loop size: X[m]  38.1   Y[m]  38.1                   RX location: X[m]   0.0   Y[m]   0.0

Model    Resistivity   Thickness   Elevation
Layer     [ohm-m]         [m]         [m]
   1        421.80        7.2      2337.8
   2        141.30       77.1      2330.5
   3         10.62        --       2253.4              Fit Error[%]: 21.706

System: EM-47   Freq[Hz]: 315   Data Set Code: uh      System: EM-47   Freq[Hz]:  30   Data Set Code: hi
TX Cur[A]:  2.5   Turn Off[usec]:   2.5                TX Cur[A]:  2.5   Turn Off[usec]:   2.5
RX Moment[turns-m^2]:    31.4    Gain Setting:  3      RX Moment[turns-m^2]:    31.4    Gain Setting:  7

       Time     rhoa_obs  obs_err  mask  rhoa_cal             Time     rhoa_obs  obs_err  mask  rhoa_cal  
       [ms]     [ohm-m]     [%]          [ohm-m]              [ms]     [ohm-m]     [%]          [ohm-m]   
 1   0.00680      160.8     0.1     u      165.7        1   0.10000      133.3     3.6     u      130.0
 2   0.00890      171.0     0.1     u      160.9        2   0.12100      103.1     3.6     u      114.2
 3   0.01200      164.8     0.2     u      161.7        3   0.15100      110.2    10.4     u       97.9
 4   0.01570      154.0     0.2     u      163.9        4   0.18800       93.6    11.1     u       83.9
 5   0.02000      170.0     0.3     u      167.9        5   0.23100       67.5     9.4     u       72.8
 6   0.02610      160.6     0.6     u      174.2        6   0.29100       59.4    14.0     u       62.4
 7   0.03340      181.3     1.1     u      179.9        7   0.36500       54.0    18.3     u       54.0
 8   0.04210      215.8     1.9     u      181.6        8   0.45200       45.9    21.9     u       47.5
 9   0.05410      142.6     2.1     u      176.1        9   0.57000       38.4    18.8     u       41.6
10   0.06820      146.9     4.5     u      163.3       10   0.71200       38.8    29.2     u       37.0
11   0.08380      206.5    18.9     u      147.8       11   0.87100       33.3    40.7     u       33.5
12   0.10460      120.8    13.1     u      129.7       12   1.08000       32.2    48.5     u       30.4
13   0.13560      127.5    14.8     u      109.7       13   1.39000       25.9    59.0     u       27.4
14   0.17230       99.5    27.2     u       93.9       14   1.75000       26.4   100.0     u       25.1
15   0.21490       73.5     8.6     u       81.7       15   2.18000       33.0   100.0     u       23.4
16   0.27500       83.1    41.3     u       70.7       16   2.78000       19.4   100.0     u       21.8
17   0.34900       58.2    24.3     u       62.3       17   3.52000       21.9   100.0     u       20.7
18   0.43600       55.0    29.7     u       56.0       18   4.39000       37.7   100.0     d        -
19   0.55500       44.3    31.0     u       50.9       19   5.56000       12.8   100.0     d        -
20   0.70100       32.9    79.1     u       47.2       20   7.04000       18.5   100.0     d        -

