Table 3.8 Primary fields of application and boundary conditions of ISTT [Adapted from Hiester
et al. (2013)]
Primary fields of
application
Steam-air injection
(TUBA-SEE)
Thermal wells
(THERIS-TCH)
Radio frequency
energy (RFH)
Unsaturated zone
Soil type
Noncohesive
Gravel
++
○
+
Sand
++
○
++
Silty sand,
sandy silt
+
+ +
+ +
Cohesive Silt
○
++
++
Loam, marl
À
++
+
Clay
À
++ to +
+
Contaminants
CHC—Chlorinated
hydrocarbons
++
++
++
BTEX—Benzene, toluene, ethylbenzene, xylene
++
++
++
PRO—Petroleum range
organics
○
+ to ○
+ to ○
PAH—Polycyclic aromatic hydrocarbons
À
○ to À
○
Saturated zone
Soil type
Aquifer
Gravel
+ to ○
À
○ to À
Sand
++
À
○ to À
Silty sand,
sandy silt
+
+ t o ○
+
Aquitard Silt
À
+
+ + t o +
Loam, marl
À
++ to +
+
Clay
À
++ to +
+
Contaminants
CHC—Chlorinated
hydrocarbons
++ to +
++ to +
++ to +
BTEX—Benzene, toluene, ethylbenzene, xylene
++ to +
++ to +
++ to +
PRO—Petroleum range
organics
○
+ to ○
+ to ○
PAH—Polycyclic aromatic hydrocarbons
○
○
○
Equipment components
Energy supply for heating Gas, diesel (electrical) Electrical
Electrical
SVE—Extraction unit
Blower
Vacuum pump (VP) Blower, VP
(continued)
3 In Situ Thermal Treatments and Enhancements: Theory and Case Study
193