Soil remediation preserves urban buildings and historical heritage

In Shanghai, there is a time-honored manufacturing plant remaining on the original site of a gold pen factory. It is so well-preserved industrial district in Shanghai that the land is planned to be used as a cultural display such a museum. To preserve this cultural heritage for future generations, SUEZ rehabilitated its contaminated land and groundwater to better improve the area’s environment.
The mission
A gold pen factory once stood in Plot 604, an area of land in Putuo’s Taopu Smart City in Shanghai that spans 26,498 m2. The factory, which used to manufacture stationery and sporting goods, housed potentially polluting zones such as electroplating shops and wastewater treatment plants. PAHs, Freon-113 and TPH are among the key pollutants found in the area that caused soil and groundwater pollution.
Our solution

SUEZ brings its 40+ years of experience in soil remediation to help clients restore land and achieve sustainability in China. We first need to have a comprehensive understanding of the land conditions, then we will define a customised rehabilitation and follow-up remediation plan to restore the land use.


SUEZ participated in the preparation of the “Rehabilitation Plan on the Remediation Treatments of Polluted Soil and Groundwater in Shanghai Taopu Smart City Core Area's “Plot 604 - Gold Pen Factory. Because it is a heritage site for national industrial history, the plot must be permanently preserved. For this reason, we adopted in-situ remediation which involves processes such as settling positions of wells, drilling wells, installing extraction and injection systems, chemical injection and extraction. In this way, we remediated polluted soil and provided post-maintenance and follow-up monitoring services.

We also performed phase separation on contaminated groundwater without damaging the original structure and facilities of the site. Eventually, we completed the rehabilitation through activated carbon adsorption, wastewater and hazardous waste treatments.
The result
SUEZ successfully rehabilitated 1,364 m2 of soil and 5,466 m3 of groundwater by preserving the original building successfully that satisfied reuse standards. Upon completion of the project, the old factory district radiates its renewed vitality. It is a typical case study of in-situ remediation of old polluted industrial sites in Shanghai and within the country.
soil rehabilitated
groundwater rehabilitated