## 3 Results
### Preferred Technology Mix  
The mix when selecting the technologies ranked first in Table 6 is as follows: site contamination source control technologies consist of institutional control, risk monitoring, and emergency response; for upper phreatic aquifer remediation, the groundwater contamination source control technology consists of multiphase extraction, process blocking \begin{table}
\begin{tabular}{c c c c c c c} \hline \hline \multirow{2}{*}{**Type**} & \multicolumn{2}{c}{**Upper (Phereatic) Aquifer**} & \multicolumn{3}{c}{**Lower (Micro-Confined) Aquifer**} \\ \cline{3-8}  & & **Remediation Technology** & **Score** & **Rank** & **Remediation Technology** & **Score** & **Rank** \\ \hline \multirow{8}{*}{Source control} & Site contamination source control & Institutional control & 3.00 & 1 & Institutional control & 3.00 & 1 \\ \cline{2-8}  & Site contamination source control & Risk source monitoring & 3.00 & 1 & Risk source monitoring & 3.00 & 1 \\ \cline{2-8}  & Emergency response & 3.00 & 1 & Emergency response & 3.00 & 1 \\ \cline{2-8}  & & Multiphase extraction & 2.68 & 1 & Multiphase extraction & 2.68 & 1 \\ \cline{2-8}  & & Natural source zone depletion & 2.52 & 2 & Pump and treat & 2.54 & 2 \\ \cline{2-8}  & Groundwater contamination source control & In situ thermal desorption & 2.51 & 3 & Natural source zone depletion & 2.52 & 3 \\ \cline{2-8}  & & Enhanced soil solubilization & 2.51 & 3 & In situ thermal desorption & 2.51 & 3 \\ \cline{2-8}  & Pump and treat & 2.38 & 5 & Enhanced soil solubilization & 2.42 & 5 \\ \cline{2-8}  & Soil gas phase extraction & 0.00 & / * & Soil gas phase extraction & 0.00 & / \\ \cline{2-8}  & Vitrification immobilization & 0.00 & / & Vitrification immobilization & 0.00 & / \\ \hline \multirow{8}{*}{Process blocking} & Interception ditch & 2.59 & 1 & Hydrodynamic control & 2.80 & 1 \\ \cline{2-8}  & Hydrodynamic control & 2.55 & 2 & Interception ditch & 0.00 & / \\ \cline{2-8}  & Permeable reactive barrier & 2.53 & 3 & Permeable reactive barrier & 0.00 & / \\ \cline{2-8}  & Underground barrier & 2.31 & 4 & Underground barrier & 0.00 & / \\ \hline \multirow{8}{*}{Process blocking} & Monitoring of natural attenuation & 2.82 & 1 & Monitoring of natural attenuation & 2.82 & 1 \\ \cline{2-8}  & Enhanced bioremediation & 2.72 & 2 & Enhanced bioremediation & 2.63 & 2 \\ \cline{2-8}  & Phytoremediation & 2.69 & 3 & Multiphase extraction & 2.61 & 3 \\ \cline{2-8}  & Multiphase extraction & 2.61 & 4 & Chemical oxidation & 2.57 & 4 \\ \cline{2-8}  & Chemical oxidation & 2.49 & 5 & Pump and treat & 2.54 & 5 \\ \cline{2-8}  & In situ thermal desorption & 2.44 & 6 & Aeration & 2.51 & 6 \\ \cline{2-8}  & Enhanced soil solubilization & 2.44 & 6 & In situ thermal desorption & 2.44 & 7 \\ \hline Aeration & 2.43 & 8 & Enhanced soil solubilization & 2.36 & 8 \\ \cline{2-8}  & Pump and treat & 2.38 & 9 & Well stripping & 2.27 & 9 \\ \cline{2-8}  & Well stripping & 2.19 & 10 & Phytoremediation & 0.00 & / \\ \cline{2-8}  & Soil gas phase extraction & 0.00 & / & Soil gas phase extraction & 0.00 & / \\ \cline{2-8}  & Vitrification immobilization & 0.00 & / & Vitrification immobilization & 0.00 & / \\ \cline{2-8}  & Bioventing & 0.00 & / & Bioventing & 0.00 & / \\ \hline \multirow{2}{*}{Assisting technologies} & Directional wells & 0.00 & / & Directional wells & 0.00 & / \\ \cline{2-8}  & Pressure fracturing & 0.00 & / & Pressure fracturing & 0.00 & / \\ \hline \hline \end{tabular}  
* */* indicates that the technology is not suitable for the site, and scored 0.00, and will not be ranked.  
\end{table} 
Table 6: Ranking of petrochemical site contamination remediation technologies. technology consists of interception ditch, and in situ plume remediation technology consists of monitoring of natural attenuation; for lower micro-confined aquifer remediation, the groundwater contamination source control technology consists of multiphase extraction, process blocking technology consists of hydrodynamic control, and the in situ plume remediation technology consists of monitoring of natural attenuation.