表-2 日本・韓国・中国・台湾の土壌環境基準の比較

Country	Japan	Korea	China	Taiwan
Content	Standard	Environmental standards related to soil contamination	Warning level (mg/kg)	Action level (mg/kg)	Standards for Soil Environmental Quality of China (GB15618-1995) (mg/kg)	Soil pollution control standards (mg/kg)	Soil pollution monitoring standards (mg/kg)
Basic Environment Law (mg/L)	Limit value stated in the Soil Contamination Countermeasure Act Content (mg/kg)	Limit value stated in the Soil Contamination Countermeasure Act Leaching (mg/L)	Area1(agricultural land* academe etc)	Area2(for est, amusement park etc)	Area3 (parking* rail* factory etc)	Area1(agricultural land* academe etc)	Area2(for est, amusement park etc)	Area3 (parking* rail* factory etc)	First grade	Second grade	Third grade

Cadmium	0.01 (For rice cultivation, under 1mg per 1kg of	150	0.01	4	10	60	12	30	180	0.2	0.3	0.3	0.6	1	20	10 (In case of plantation , 2.5)
Total cyanide	None	2	2	120	5	5	300
Lead	0.01	150	0.01	200	400	700	600	1200	2100	35	250	300	350	500	2000	1000(In case of plantation 300)
Hexavalent chromium	0.05	250	0.05	5	15	40	15	45	120	90	250	300	350	400	250	175
Aresenic	0.01 (For agricultural land, 15mg per 1kg of	150	0.01	25	50	200	450	1500	6000	15	30	25	20	30	60	30
Total mercury	0.0005	15	0.0005	4	10	20	12	30	60	0.15	0.3	0.5	1	1.5	20	10(In case of plantation 2)
Alkyl mercury	None
PCB polychlorinated biphenyl	None	1	4	12	3	12	36
Dichloromethane	0.02
Carbon tetrachloride	0.002
1,2-Dichloroethane	0.004
1,1-Dichloroethene	0.02
Cis-1,2-dichloroethylene	0.04
1,1,1-trichloroethane	1
1,1,2-trichloroethane	0.006
Trichloroethylene	0.03	8	8	40	24	24	120
Tetrachloroethylene	0.01	4	4	25	12	12	75
1,3-Dichloropropene	0.002
Thiuram	0.006
Simazine	0.003
Thiobencarb	0.02
Benzene	0.01	1	1	3	3	3	9	0.05	0.5
Selenium	0.01	150	0.01
Organic phosphorus	None	10	10	30	N/A	N/A	N/A
Copper	For agricultural land, 125mg per 1kg of soil	150	500	2000	450	1500	6000	35	50	100	100	400	400	220(In case of plantation 120)
Zinc	300	600	2000	900	1800	5000	100	200	250	300	500	2000	1000(In case of plantation 260)
Chromium	None
Phenol	None	4	4	20	10	10	50
Fluorine	0.8	4000	0.8	400	400	800	800	800	2000
Beryllium	None
Nickel	None	100	200	500	300	600	1500	40	40	50	60	200	200	130
Vanadium	None
Boron	1	4000	1
Dioxin	1000pg-TEQ/g
Environmental standards only applicable outside of Japan
Toluene	20	20	60	60	60	180
Ethyl benzene	50	50	340	150	150	1020
Xylene	15	15	45	45	45	135
TPH	500	800	2000	2000	2400	6000
Benzo[a]pyrene	0.7	2	7	2	6	21
DDT dichloro-diphenyl-trichloro-ethane	0.05	0.5
Chloroform
Dichlorobenzene
Dichlorobenzidine
Hexachlorobenzene
Pentachlorophenol
Petroleum hydrocarbon
Trichlorophenol
Chloroethene
Aldrin
Chlorane
Dieldrin
Endrin
Heptachlorobiphenyl
Toxaphene
Endosulfan

1: Standard for land use in China

First grade

Soil environmental standard for natural protection in naturally protected area

Second grade

Soil environmental standard for agricultural production and for human health

Third grade

Soil environmental standard for forestry production and for plantation of plants

ワークショップの開催：2012年10月25日から26日の2日間にわたって、International Workshop on "Utilization of Recycling Materials and Their Environmentally Sound Quality in Asian Countries"と題してワークショップを仙台市にて開催した。参加者は、韓国2名、台湾2名、インド2名、シンガポール1名を含む26名であった。各国より循環資材利用の取組と課題についてプレゼンテーションが行われ、熱心な討論が交わされた。第二日目の製錬会社等の見学会では、日本の環境技術、リサイクル技術について強い関心が寄せられ、現場対応者と活発な意見交換が行われた。ワークショップの議論より、循環資材利用に対する取組は各国の人口密集度、工業化の程度、国土の大きさなどが強く関係しており、特にシンガポールと台湾は喫緊の課題であることが明らかとなった。また、日本・韓国・中国・台湾の土壌環境