Standard Values for Contaminated Soils | オオノ開發株式会社（オオノ・アソシエーツ）

Contaminated Soil Treatment

Table of Standard Values for Contaminated Soils

Type of Toxic Substance		Standard Values in Soil Contamination Countermeasures Act			Permitted for Ohno Associates
Type of Toxic Substance		Leachate Standard (mg/L)	Content Standard (mg/kg)	Ground Water Standard (mg/L)	Landfill1 ※1(Second Leachate Standard)	Cleaning	Crushing and Grading (Classification)	Pyrolysis
Class I (11 items)	Carbon Tetrachloride	≤0.002		≤0.002	0.02			●
	1,2-Dichloroethane	≤0.004		≤0.004	0.04			●
	1,1-Dichloroethylene	≤0.1		≤0.1	1			●
	Cis-1,2-Dichloroethylene	≤0.04		≤0.04	0.4			●
	1,3-Dichloropropene	≤0.002		≤0.002	0.02			●
	Dichloromethane	≤0.02		≤0.02	0.2			●
	Tetrachloroethylene	≤0.01		≤0.01	0.1			●
	1,1,1-Trichloroethane	≤1		≤1	3			●
	1,1,2-Trichloroethane	≤0.006		≤0.006	0.06			●
	Trichloroethylene	≤0.03		≤0.03	0.3			●
	Benzene	≤0.01		≤0.01	0.1			●
Class II (9 items)	Cadmium and Compounds	≤0.01	≤150	≤0.01	0.3	●	●	●
	Hexavalent Chromium Compounds	≤0.05	≤250	≤0.05	1.5	●	●	●
	Cyanogen Compounds	Not detected	≤50 (as free cyanide)	Not detected	1	●	●	●
	Mercury and Compounds	Mercury ≤0.0005 and alkyl mercury not detected	≤15	Mercury ≤0.0005 and alkyl mercury not detected	0.005 ※2
	Selenium and Compounds	≤0.01	≤150	≤0.01	0.3	●	●
	Lead and Compounds	≤0.01	≤150	≤0.01	0.3	●	●	●
	Arsenic and Compounds	≤0.01	≤150	≤0.01	0.3	●	●
	Fluorine and Compounds	≤0.8	≤4,000	≤0.8	24	●	●
	Boron and Compounds	≤1	≤4,000	≤1	30	●	●
Class III (5 items)	Simazine	≤0.003		≤0.003	0.03		●	●
	Thiuram	≤0.006		≤0.006	0.06		●	●
	Thiobencarb	≤0.02		≤0.02	0.2		●	●
	PCB	Not detected		Not detected	0.003
	Organic Phosphorous Compounds	Not detected		Not detected	1		●	●
Others	Dioxin				3 ※3		●	●
Others	Oils				5 ※4			●

※1 Only values not exceeding the standard values are accepted. Unit: mg/L (except for dioxins).
※2 Provided that alkyl mercury is not detected.
※3 Unit: ng-TEQ/g
※4 Value with % oil as unit