Remember that our network has a volumetrics module connected to Krig_3D.
volumetrics calculates plume volume and associated masses on any data component in its input. If you open up volumetrics user interface we can quantify the variation in plume volume in seconds.
We will start with the 80%Min:TOTHC (minimum plume). Select it in volumetrics so your window matches the figure below.
Now repeat this process for TOTHC and the 80%Max:TOTHC by selecting the Nodal DataComponent in volumetrics.
Each time the volumes are calculated, they are printed on the volumetrics panel.
The Mass $ figures aren't usually applicable for environmental, but could be useful if you had a remediation process whose costs were proportional to extracted contaminant mass. This feature is primarily there to calculate the value of ore bodies (e.g. 42,356 ounces of gold at $200 per ounce). The Volume Dollars are useful for estimating the costs for extracting and disposing of contaminated soil.
When we ran all three, the results were:
Minimum Plume:
Soil Case
Geologic Layers: All
Computations for 80%Min:TOTHC
plume_volume Level = 1.0000E+001 mg/kg (ppm)
Total Soil Volume = 2.5515E+004 Cubic Yards
Total Soil Mass = 1.6699E+011 U.S. Short Tons
Chemical Volume = 8.9565E+000 Cubic Yards
Chemical Mass = 3.1684E+007 U.S. Short Tons
Average 80%Min:TOTHC = 1.8974E+002 mg/kg (ppm)
Volume $1.5309E+006
Mass $1.2674E+010
Center of Mass ( 11,330.4300, 12,887.2081, -12.8413 )
Nominal Plume:
Soil Case
Geologic Layers: All
Computations for TOTHC
plume_volume Level = 1.0000E+001 mg/kg (ppm)
Total Soil Volume = 6.7199E+004 Cubic Yards
Total Soil Mass = 4.3979E+011 U.S. Short Tons
Chemical Volume = 2.6300E+002 Cubic Yards
Chemical Mass = 9.3040E+008 U.S. Short Tons
Average TOTHC = 2.1156E+003 mg/kg (ppm)
Volume $4.0319E+006
Mass $3.7216E+011
Center of Mass ( 11,349.3369, 12,905.2901, -2.4122 )
Soil Case
Geologic Layers: All
Computations for 80%Max:TOTHC
plume_volume Level = 1.0000E+001 mg/kg (ppm)
Total Soil Volume = 1.5187E+005 Cubic Yards
Total Soil Mass = 9.9391E+011 U.S. Short Tons
Chemical Volume = 2.7851E+004 Cubic Yards
Chemical Mass = 9.8527E+010 U.S. Short Tons
Average 80%Max:TOTHC = 9.9131E+004 mg/kg (ppm)
Volume $9.1121E+006
Mass $3.9411E+013
Center of Mass ( 11,364.5953, 12,918.0579, 6.1397 )
Note that there is nearly a six fold difference between the Min and Max plume volumes. We wouldn't normally consider this well characterized, especially since it would result in a nearly $8M difference in the cost to extract the max soil plume (vs. the min plume) if disposal and extraction costs were $60 per cu. yd. This kind of information makes it easier to see the cost advantages associated with further (better characterized) site assessment, and can help identify when you've done enough.
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