how to sample soil samples. soil contamination countermeasures act object substance : heavy...
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Soil Contamination Countermeasures Act Object substance : Heavy metals , PCB ,
Agrochemical , VOC
Act on Special Measures concerning Countermeasures against Dioxins
Object substance : Dioxins
Japanese law about a soil investigation
Feb.20152
Investigation substance of the soil pollution
Feb.20153
Substances dissolved in
the water mg/L( )1)
Substances included in
the soil mg/kg( )2)
Cadmium(Cd) 0.01 150
Hexavalent Chromium(Cr+6) 0.05 250
Cyanogen (CN) Nondetection 50
Mercury(Hg) Nondetection 15
Selenium(Se) 0.01 150
Lead(Pb) 0.01 150
Arsenic(As) 0.01 150
Fluorine(F) 0.8 4000
Boron(B) 1 4000
Substance
Standard Value
Heavy metals
Investigation substance of the soil pollution
Feb.20154
VOC Agrochemical , PCBStandard Value Standard Value
Substances dissolved in
the water mg/L( )
Substances dissolved in
the water mg/L( )1)
Carbon Tetrachloride 0.002 Simazine 0.003
1,2-Dichloroethane 0.004 Thiobencarb 0.02
1,1-Dichloroethylene 0.1 Thiuram 0.006
cis-1,2-Dichloroethylene 0.04 Organic phosphorus(O-P) Nondetection
1,3-Dichloropropene 0.002 PCB Nondetection
Dichloromethane 0.02
Tetrachloroethylene 0.01
1,1,1-Trichloroethane 1
1,1,2-Trichloroethane 0.006
Trichloroethylene 0.03
Benzen 0.01
Substance Substance
Method of producing test solution
Feb.20155
1)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 Third, filtering it using 0.45μm membrane filter
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
Land use history investigation
Feb.20156
Sampling methods of the soil
12 Feb.2015
Nothing covered on the surface
0 ~5cm
5 ~50cm
Concrete or Asphalt
0 ~ 5cm
5 ~ 50cm
The surface covered with concrete or asphalt
Case1 The polluted soil exists on the ground surface
Sampling methods of the soil
13 Feb.2015
Case2 The polluted soil exists in the ground
Toxic substance retention tank
50cm under the retention tank
Drain pipe
50cm under the drain pipe
Mixing methods of the soil samples
14 Feb.2015
same weight
10m
30m
Soil + Soil A B
Mixing by thesame weight
Mixing by the
0 5cm~
5 50cm~
Soil A
Soil B
Sampling methods of the soil(Dioxins)
2014/2/2115
same weight
on the ground surface
5 10~ m
0 5cm~
5 10~ m
Mixing by the
Polluted depth investigation
18 Feb.2015
Sampling spots
Clay layer
1.0m
2.0m
3.0m
on the ground surface
Sampling spot in order to determine the polluted depth
Boring core sample