0. How to sample Soil samples

1. Japanese law about a soil investigation
Soil Contamination Countermeasures Act
Object substance：Heavy metals , PCB ,
Agrochemical , VOC
Act on Special Measures concerning Countermeasures against Dioxins
Object substance：Dioxins
Feb.2015

2. Investigation substance of the soil pollution
Heavy metals
Feb.2015

3. Investigation substance of the soil pollution
VOC
Agrochemical , PCB
Feb.2015

4. Method of producing test solution
Substances dissolved in the water
(Heavy metals , PCB , Agrochemical )
　　First, mixing dried soil and distilled water at a rate of 1 to 10
　　Second, shaking it for 6 hours
　　Third, filtering it using 0.45μm membrane filter
2) Substances included in the soil (Heavy metals )
First, mixing dried soil and 0.1N hydrochloric acid at a rate
of 3 to 100
　　Second, shaking it for 2 hours
Feb.2015

5. Land use history investigation
Our investigation include; ・Collecting information about a toxic 　　　　　 substance (use, storage, leakage) ・Interviewing from owner and worker of the land ・Researching on the current condition of the land
Feb.2015

6. Land use history investigation
Feb.2015

7. Result of the Land use history investigation
Feb.2015

8. Insertion of the Grid
Feb.2015

9. Grid with the risk of soil pollution
Feb.2015

10. Sampling spots
Feb.2015

11. Sampling methods of the soil
Case1 The polluted soil exists on the ground surface
Nothing covered on the surface
0～5cm
5～50cm
Concrete or Asphalt
0～5cm
5～50cm
The surface covered with concrete or asphalt
Feb.2015

12. Sampling methods of the soil
Case2 The polluted soil exists in the ground
Drain pipe
50cm under the
drain pipe
Toxic substance
retention tank
50cm under the
Feb.2015

13. Mixing methods of the soil samples
Feb.2015

14. Sampling methods of the soil (Dioxins)
2014/2/21

15. Soil pollution area
Feb.2015

16. Additional sampling spots
Feb.2015

17. Polluted depth investigation
Feb.2015

18. Soil investigation scenery
Feb.2015

19. Soil investigation scenery
Feb.2015

20. Хвала лепо 20