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45.Report on Environmental Impact Assessment of the Sakae Factory Renovation Project

Last Updated January 23, 2019

Review Board No. 16
December 14, 2000


The Mayor of Yokohama Hidenobu Takahide


Yokohama Environmental Impact Assessment Examination Committee
Mr. Yosuke Ikari


Investigation and deliberation on environmental impact assessment of "Environmental Business Bureau Sakae Factory Renovation Project" (Report)


As a result of carefully conducting investigations and deliberations on the titles that were consulted on March 24, 2000, the ringing Standards No. 57 on June 30, 2000 and the Ring Standards No. 57 on June 30, 2000, I have obtained the following conclusions.

1 Basic matters

(1) Environmental Business Bureau Sakae Factory Renovation Project (hereinafter referred to as the “Project”) is

  • Complete renewal of aging incineration facilities at the same scale
  • Addition of incineration residual treatment facilities to detoxify, stabilize, and recycle incinerated ash and incinerated fly ash and to reduce the burden on the environment.
  • Installation of the latest treatment equipment to strengthen environmental conservation measures, including controlling dioxins and other emissions
  • Enhance power generation capacity to make further effective use of thermal energy
  • Raising the existing factory building for these facilities and expanding the new building

It's something to do.
Therefore, since this project is basically a renovation project, the amount of pollutants emitted into the environment will be reduced by introducing the latest equipment as indicated in the project plan and strengthening environmental conservation measures. However, considering that it is located in a complex terrain and that it will continue to operate for a considerable period of time after renovation, it is essential to thoroughly consider measures to minimize the environmental impact in the renovation.

(2) One of the factors that greatly affect the total amount of air pollutants emitted is the amount of waste and the quality of waste, so it is necessary to further promote measures to reduce and recycle resources in the future.

(3) During demolition work, there is a high possibility that harmful substances will be contained in the residuals inside the plant, and the amount of construction is large, so during construction, pay due consideration to the environmental impact on the surrounding area and pay close attention to the construction is required.

(4) Although the incineration residual treatment facility has a track record of operation in Japan, it has few track record of the same type and scale. It is important to ensure safety, and it is necessary to carefully consider it from the planning stage based on the results of the melting experiment.

(5) Regarding changes in the impact of the Sakae Plant on the atmospheric environment before and after the renovation, we carefully examined the analysis of current concentrations, differences in effective chimney heights and the effects of the backward whirlpool caused by the new building (downwalk), the behavior of exhaust gas transfer and diffusion in complex terrain, and the degree of reduction in pollutant emissions.

  • Regarding the current concentration, no clear effect from existing facilities could be found based on the analysis results by wind direction.
  • Regarding the effective chimney height, the amount of exhaust gas increases after the renovation, which is advantageous for the rise in exhaust gas, but on the other hand, the effective chimney height is slightly lower overall due to a decrease in exhaust gas temperature and discharge rate. Is expected to be
  • According to the wind tunnel model experiment, the degree of occurrence of upgrading the existing factory building, downwash, and downdraft caused by the new building is about the same level as before the renovation.
  • Regarding the transfer and diffusion of exhaust gas, taking into account the fact that the planned site is intricate terrain, we conduct wind tunnel model experiments and field diffusion experiments, and use this information to estimate the ground concentration using numerical simulations. In general, the maximum landing concentration is relatively likely to appear near chimneys in complex terrain, and such phenomena are observed in field diffusion experiments, but these trends are not reproduced in numerical simulations. The maximum landing concentration near the chimney seems to have appeared in the current situation before the renovation, but since these are thought to be mainly due to topographic downdrafts, there is no reason to deteriorate this concentration after the renovation. However, further efforts are needed to improve the emission outline to minimize the maximum landing concentration in the vicinity as much as possible.
  • As for pollutant emissions, considerable improvement is expected as a result of comparing and examining the actual emissions before the renovation, the management target values after the renovation, the management target values after the renovation, and the latest emissions at the Tsurumi Plant and Asahi Plants.

Based on the above, it is unlikely that the renovation will deteriorate the air quality, but further efforts will be made to improve the surrounding air environment.

2 Individual Matters

(1) Under construction

A. Air pollution, water pollution, waste and soil generated

(a) As measures to prevent the scattering of dust due to demolition work, the installation of temporary enclosures on the outer periphery and watering are mentioned, but there is a high possibility that the residuals inside the plant equipment will contain harmful substances. Take measures according to "Prevention of Health Disorders due to Dioxins in the Demolition Work" (Notice of Labor Standards Bureau No. 561) and comply with related laws and regulations. In addition, outdoor work must be kept to a minimum.

(b) Since the Sakae Plant was built in the early 1950s, we conducted a thorough investigation on the use of asbestos, and for the location of use, refer to the “Guidelines for Renovation and Demolition Construction of Buildings Using Asbestos (Asbestos) Proper treatment and disposal based on the Bureau).

B. Local Communities
In the basin and equinoctial week where there are many visitors to the adjacent cemetery, it is desirable to avoid traffic congestion and the quietness of the cemetery.

(2) Existence and Operation

A. Air Pollution

(a) In order to improve the atmospheric environment around the planned site, it is necessary to further control the emission of pollutants, so always grasp the latest exhaust gas treatment technology and actively introduce technologies that can be introduced. In particular, incineration residue treatment facilities should be carefully considered at the planning stage, including the treatment method before connecting to the incinerator flue.
In addition, strive for proper operation and management of incinerators, residual treatment facilities, and exhaust gas treatment equipment.

(b) According to the plan, the effective chimney height is expected to be slightly lower than the current situation. In the location conditions, it is considered that the topographical effect and nearby buildings during the rise process of exhaust gas are considered to be large, so increase the effective discharge rate should be increased to avoid this as much as possible.

(c) In order to contribute to the improvement of the atmospheric environment in the surrounding area, it is desirable to introduce low-emission vehicles in garbage collection vehicles and relay transport vehicles. Therefore, when renewing these vehicles, efforts should be made to introduce low-emission vehicles that use natural gas, liquefied petroleum gas, and gasoline as fuel, and to install exhaust particulate removal equipment to diesel vehicles that use light oil.

B. Plants and animals

The planned site is designated as a suburban green conservation area, scenic area, etc., and it is hoped that the greenery will be planted as much as possible.

C Landscape

Considering that there are many green spaces around the planned site, it is necessary to consider that the existence of artificial objects such as buildings does not cause discomfort as much as possible in terms of the landscape. Therefore, the design should be devised for the existing factory building and the new building, and consider the color of buildings and chimneys, etc., including these.

D. Safety

Since the incineration residual treatment facility operates a high-temperature melting furnace, special consideration is required for disaster prevention. For this reason, in addition to known safety measures, thorough measures should be taken by referring to examples of steel and aluminum smelting industry with similar electric melting furnaces.

3 Post-Survey

(1) Air pollution

Monitoring of air pollutant emissions is carried out at the flue exit.However, in order to comply with the management target values, in order to achieve lower concentrations, it is important to understand changes in the concentration of exhaust gas from the exit of the incinerator and residue treatment facility to the flue exit. It is important to understand changes in the concentration of exhaust gas exhaust gas, etc., and to use it for operation management.
Therefore, at the beginning of operation, it is necessary to fully understand the behavior of exhaust gas according to the operating condition and analyze the results of these results to be used for proper operation management.

(2) Soil pollution

Although no soil pollution survey has been cited as a post-survey item, it is necessary to grasp the status of soil contamination in the area around the factory, conduct a dioxin soil contamination survey before and after operation. The survey points should be discussed with the relevant organizations as necessary.

Additional Notes

Regarding the following Kamakura Mayor's opinion, please give due consideration when preparing the examination document.
Today, the amount of waste generated from local communities is increasing quantitatively and diversifying qualitatively.In the treatment of these, efforts will be made to reduce the impact on the surrounding environment as much as possible. It is required to secure a comfortable living environment for local residents, such as by working on reducing waste generation, reducing and recycling resources. The facility is also close to the Kamakura city area, and there is a concern about its impact.Therefore, when implementing the project, we will strive to provide accurate information to Kamakura citizens and consider the atmospheric environment described in the environmental impact assessment report during construction or after the start of operation, take appropriate measures to take appropriate measures. .

Progress of investigation and deliberation of Yokohama-shi environmental impact assessment examination committee

<Environmental Impact Assessment Survey Plan>

March 19, 1999 Business explanation (survey plan), deliberation and on-site inspection
April 26, 1999 Business description (Supplementary Materials), Secretariat Explanation (Draft Report) and Deliberation

<Environmental Impact Assessment Preparation>

March 24, 2000 Business description (preparation letter) and deliberation
April 28, 2000 Selection of a statement of opinion
May 26, 2000 Statement of Opinion (6 members)

<Environmental Impact Assessment Report>

June 30, 2000 Confirm the minutes of the statement of opinion, business description (evaluation report, supplementary materials) and deliberation
July 27, 2000 Business description (Supplementary Materials) and Deliberation
September 8, 2000 Business explanation (Supplementary materials, summary of citizen opinion and company opinion) and deliberation
October 26, 2000 Explanation of the Secretariat (List of Items to be considered) and Deliberation
November 30, 2000 Secretariat Explanation (Report of the Examination Committee) and Deliberation

List of supplementary materials submitted by the business operator to the Yokohama Environmental Impact Assessment Examination Committee

  1. Opinions on Value Statements and Business Operators
  2. About garbage measure of Yokohama-shi
  3. Seasonal variations in waste quality
  4. Installation status of electric melting equipment
  5. Molten exhaust gas properties
  6. Stability of molten solidified material
  7. About stability of molten fly ash
  8. Safety measures for electric melting equipment
  9. Effective use of molten slag
  10. About dioxin data of Yokohama-shi
  11. Topographic cross-sectional map around the planned site
  12. outline exhaust gas before and after renovation
  13. Forecast assessment of air pollution
  14. Noise generating equipment before and after renovation
  15. About viewpoint of scenery

Yokohama City Environmental Impact Assessment Examination Committee Member List

◎ Yosuke Inokakari
Professor Goro Imai, Professor, Yokohama National University
Miyoko Urushihara Environmental Designer
Izumi Okura, Professor, Yokohama National University
Shigetoshi Okuda, Professor, Yokohama National University
○ Katsumi Saruta, Professor Emeritus, Kanagawa University
Yoshiharu Shimizu Professor Emeritus, Kanagawa University
Yoshieko Takai
Naomi Tachibana Professor, Musashino Art University
Shigehiko Tamaru, Assistant Professor, Tokai University
Rikuo Doi, Professor, Yokohama City University
Mr. Aritomo Nakano, Director of the Environmental Clinic
Nobuo Muto, Professor Emeritus, Kanto Gakuin University
Minoru Moriguchi Counselor, Japan Meteorological Association
Mizuko Yoshiyuki Professor, Tokyo University of Agriculture
Makiko Watanabe, Assistant Professor, Tokyo Institute of Technology

◎ Chairman
○ Vice Chairman
Japanese alphabetical order:

For inquiries to this page

Environmental Impact Assessment Division, Environmental Planning Bureau Policy Coordination Department

Phone: 045-671-2495

Phone: 045-671-2495

Fax: 045-663-7831

Email address: ks-eikyohyoka@city.yokohama.jp

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Page ID: 917-977-569

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