Soil and Groundwater Contamination Survey and Countermeasure Technologies

Category of Tchnology	Survey	Simplified Analysis of Heavy Metals in Soil
Media	Soil
Contaminants	Heavy Metal (Cd, Pb, As, Hg, Se, etc)
	Applied (Demonstrated) Substances	Cadmium, Lead
Scope	Concentration Range	Close correlation with the official method was seen in lower concentration range.
	Hydrogeological Conditions	Saturated Unsaturated	Permeable Layer Semi to Impermeable Layer
	Chemical Soil Properties
	Other Remarks	If the soil’s chemical properties change, such changes must be taken into consideration in the formulas used.
Technology Description	Classification
	Status	Under Demonstration Soil and Groundwater Countermeasure Test Study (Performed 1995)
	Outline of Technology	This analysis method was developed with the aim of streamlining the pre-treatment process to prepare the solution of the sample to be analyzed, which is the most costly and time-consuming part of the work.  This is a simplified, quick analytical method, in which heavy metals contained in the soil are extracted in a short time using hydrochloric acid solution.
	Required Pre- and Post-treatment	Use the criteria of the official method to determine whether the soil meets the environmental standards.
	Enhance Effectiveness through Combination	This may be used to supplement the official method.
	Case History	To find out the correlation between the ATNL method and the official method, the soils contaminated with cadmium and lead were analyzed by each method. A close correlation was found between them in cases where geological features are similar.
	Application Examples
	Limitations	Although this method supplements the official method, the results by this method may show a larger contaminated area than the one by the official method because of higher extraction efficiency.
	Properties of Treated Soil	-
Schematic Flow Process	Flow-chart of Accelerated Extraction/Elution in Hydrochloric Acid for Measuring Metallic Contaminants
Applicability	In Situ Applicability	Not Possible
	Ground Structures	-
	Required Excavation
	Groundwater Extraction
	Required Space	-
	Operational Time	-
	Installation Time	Survey time can be shortened.
	Maintenance and Control Requirements	-
	Additional Remarks
Secondary Impacts to Environment	Secondary Treatment Required?	-
	Effects on Living Environment
	Additives	-
	Possibility of Contaminant Spreading	None
	Secondary By-products	-

• Understanding the Contamination Survey and Countermeasure Technology Description Sheet
• Where to make contact

Soil Environment Management Division, Water Environment Department, Environmental Management Bureau, Ministry of Environment
Tel: +81-3-5521-8319
E-mail: MOE@env.go.jp