## Groundwater Remediation for Chlorobenzene Contamination at an Abandoned Dye Factory

**Rare in Taiwan DNAPLs\* Pollution Successfully Tackled**  
**Innovative On-site Technology Achieved Complete Remediation**



 

 

 



 

 

 

 





### Site Background

The site is a former dye and pigment manufacturing facility located in Xinzhuang District, New Taipei City, near Fu Jen Catholic University.

### Pollution Status

In 2007, the Environmental Protection Bureau of New Taipei City Government designated the site as a control site for soil contamination, mandating remediation within a set timeframe. Primary pollutants included copper in soil, with 1,4-dichlorobenzene and chlorobenzene contamination in groundwater, affecting an area of 6,400 m2.

### Remediation Approach

In 2008, ApolloTech was contracted to lead the site’s remediation project. Through thorough supplemental investigations, laboratory analysis, and strategic remediation planning, the restoration and cleanup were completed by 2010. Verified by the Environmental Protection Bureau of New Taipei City Government, the site was subsequently removed from the control site list, and the land was successfully returned to productive use for the client.

### Application of Advanced In Situ Injection Technology

ApolloTech conducted a comprehensive assessment of the site’s DNAPLs pollution distribution and applied the innovative in situ injection method. Based on the site’s hydrogeological profile, we deployed In Situ Chemical Oxidation (ISCO) and enhanced aerobic biodegradation in distinct remediation zones to achieve complete and effective restoration.

  
*\*DNAPLs: Dense Non-Aqueous Phase Liquid, typically chlorinated hydrocarbons or petroleum-based pollutants*



 

 

 



 

 

## Key Data

| **Soil Pollutants** | **Heavy Metals (Copper)** |
|---|---|
| **Groundwater Pollutants** | **1,4-Dichlorobenzene, Chlorobenzene** |
| **Site Area** | **7,600 m2** |
| **Excavation Area** | **6,400 m2** |
| **Excavated Soil Volume** | **14,540 m3** |
| **Replacement Soil Volume** | **3,500 m3** |
| **Offsite Treated Soil Volume** | **5,900 tons** |





 

 

 

 

 

 





 

 

 

 





  Previous          ![](/sites/g/files/dvc4146/files/styles/carousel/public/image/2024/06/%E5%90%AB%E6%B0%AF03_01iSOC%E8%A8%AD%E7%BD%AE.JPG.webp?itok=a1UlXai-)   





 

###  In situ Submerged Oxygen Curtain 

 

 



 

   ![](/sites/g/files/dvc4146/files/styles/carousel/public/image/2024/06/%E5%90%AB%E6%B0%AF03_02%E8%87%AA%E5%8B%95%E7%81%8C%E6%B3%A8%E8%A8%AD%E5%82%99.JPG.webp?itok=ASn3bQPW)   





 

###  Automatic Injection Equipment 

 

 



 

   ![](/sites/g/files/dvc4146/files/styles/carousel/public/image/2024/06/%E5%90%AB%E6%B0%AF03_03%E7%8F%BE%E5%9C%B0%E6%B0%A7%E5%8C%96%E5%8A%91%E7%81%8C%E6%B3%A8.JPG.webp?itok=kUIF6D6H)   





 

###  On-site Oxidizer Injection 

 

 



 

   ![](/sites/g/files/dvc4146/files/styles/carousel/public/image/2024/06/%E5%90%AB%E6%B0%AF03_04%E6%B1%A1%E6%9F%93%E5%9C%9F%E9%96%8B%E6%8C%96.JPG.webp?itok=PAB4zXYf)   





 

###  Soil Excavation 

 

 



 

   ![](/sites/g/files/dvc4146/files/styles/carousel/public/image/2024/06/%E5%90%AB%E6%B0%AF03_05%E5%9C%9F%E5%A3%A4XRF%E7%AF%A9%E6%B8%AC.JPG.webp?itok=BqtgiJKo)   





 

###  XRF Soil Screening 

 

 



 

   ![](/sites/g/files/dvc4146/files/styles/carousel/public/image/2024/06/%E5%90%AB%E6%B0%AF03_06%E5%AE%A2%E5%9C%9F%E8%88%87%E7%BF%BB%E8%BD%89%E7%A8%80%E9%87%8B_0.JPG.webp?itok=RhjdJTKs)   





 

###  Soil Replacement and Mixing Dilution Method 

 

 



 

 

  Next        

 

 




## Technology



 

 

 



[**In Situ Enhanced Bioremediation (Bioaugmentation)**](https://www.apollotech.com.tw/en/node/536 "Technology")



 

 

 

 

 

 



 

[**In Situ Chemical Oxidation (ISCO)**](https://www.apollotech.com.tw/en/node/536 "Technology")



 

 

 

 

 

 



 

**Soil Replacement**



 

 

 

 

 

 



 

**Soil Dilution**