Environmental monitoring plan for public water reclamation project in the Shinhonmokufuto area

Last Updated August 2, 2024

Environmental monitoring plan

In the Environmental Impact Assessment Report for Public Water Reclamation Project in the Shinhonmokufuto District of Yokohama Port, the Company voluntarily conducts environmental monitoring surveys at appropriate stages during the construction period for items deemed necessary by the Kanto Regional Development Bureau of the Ministry of Land, Infrastructure, Transport and Tourism (conservation City) based on environmental conditions prior to construction. The results of the "Environmental Monitoring Survey" will be used to review the application method and strengthen environmental conservation measures. The “post-survey” in Article 32 of the Ordinance of the competent ministry has not been conducted for the following reasons as a result of examining the necessity.
①There is no possibility that the degree of environmental impact will be significant.
②There is no selection item with a large degree of uncertainty in forecasting, and knowledge on the effects of environmental conservation measures has been obtained.
③Do not implement compensation measures

About environmental monitoring survey

Survey items
Survey items			Survey method	Survey points
Environmental Management	Water quality	Turbidity, SS	Method by instrument measurement or water sampling	・Project implementation area (representative points on the Honmoku Sea Zuri facility side, Yokohama Port port entrance side, offshore side)
Understanding environmental conditions	Water quality	Living Environment Items ※1	Method by water sampling	・Project implementation area (honmoku Sea Zuri facility side, Yokohama Port entrance side, offshore side representative points*3) ・Around the project implementation area (representative point of the sea area surrounded by the project implementation area and the Minamihonmoku landfill)
	Water quality	Health items ※2	Method by water sampling
	Bottom quality	Particle size composition, water content ratio, high heat reduction, sulfide, chemical oxygen demand	Method by sludge	・Project implementation area (honmoku Sea Zuri facility side, Yokohama Port entrance side, offshore side representative points*3) ・Around the project implementation area (representative point of the sea area surrounded by the project implementation area and the Minamihonmoku landfill)
	Animal	Animal plankton	Methods by collecting with quantitative nets, sludge, etc.
		Fish eggs and fry
		Benthic organism
		Adhering organisms (animals)	Method by dive visual inspection, etc.	・Representative points of newly constructed seawall (biological symbiosis type seawall)
		Fish	Method by dive visual inspection, etc.
	Plant	Phytoplankton	Method by water sampling	・Project implementation area (honmoku Sea Zuri facility side, Yokohama Port entrance side, offshore side representative points*3) ・Around the project implementation area (representative point of the sea area surrounded by the project implementation area and the Minamihonmoku landfill)
	Plant	Adhering organisms (plants)	Method by dive visual inspection, etc.	・Representative points of newly constructed seawall (biological symbiosis type seawall)

※１： Living Environment Item: Chemical oxygen demand, total nitrogen, total phosphorus, dissolved oxygen, hydrogen ion concentration, number of coliforms, n-hexane extracts, total zinc, noylphenol, straight chain alkylbenzenesulfonic acid and its salt, bottom dissolved oxygen
※２： Health items: Cedmium, total cyanide, lead, hexavalent chromium, arsenic, total mercury, alkyl mercury, PCB, dichloromethane, carbon tetrachloride, 1,1-dichlorethylene, cis-1,2-dichloroethylene, 1,1, 1, 1, 1, 1, chloroethylene, chloroethylene, chloroethylene, chloroethylene, chloroethylene, chloroethylene, chloroethylene, chloroethylene, chloroethylene, chloroethylene, chloroethylene, chloroethylene, chloroethylene, chloroethylene, chloroethylene, chloroethylene, chloroethylene, chloroethylene,
※３： Utilize the results of public water bodies water quality survey (sea area).
※４： For the waters around the project implementation area, we will utilize public water bodies water quality surveys, Tokyo Bay simultaneous surveys, rivers and sea creatures in Yokohama (Yokohama City), etc.
※5: Items not listed in this table are voluntarily implemented.

Results of water quality survey of public water bodies (sea area)

Results of Environmental Monitoring Survey

Results of the FY2020 Survey

Environmental Management (PDF: 785KB)

Understanding the status of the environment (PDF: 3,614KB)

※There are no survey results for attached organisms (animals, plants) in FY2020.

Results of FY2021 Survey

Environmental Management (PDF: 818KB)

Understanding the status of the environment (PDF: 2,824KB)

※There are no survey results for FY2021 regarding adhering organisms (animals, plants).

Results of the FY2022 Survey

Environmental Management (PDF: 805KB)

Understanding the status of the environment (PDF: 2,409KB)

※There are no survey results for FY2022 on adhering organisms (animals, plants).

Results of the FY2023 Survey

Environmental Management (PDF: 613KB)

Understanding the status of the environment (PDF: 5,529KB)

The survey results are also published on the Keihin Port Office website of the Kanto Regional Development Bureau of the Ministry of Land, Infrastructure, Transport and Tourism.

Keihin Port Office HP (outside site)

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