46.Examination report pertaining to Seibu Shin-Yokohama non-public heliport maintenance project

No. 100 of the Ring Protection Commission
October 3, 2000

Examination Report

The opinions from conservation's point of view regarding the environment stipulated in Article 23, Paragraph 1 of the Yokohama City Environmental Impact Assessment Ordinance on Environmental Impact Assessment Preparation and Environmental Impact Assessment Report on the Seibu Shin-Yokohama Non-Public Heliport Development Project are as follows.

The Mayor of Yokohama

Hidenobu Takahide

Description

No. 1 Target Business

1 Name and location of the business operator

Name: Hiroshi Toda, Representative Director, Seibu Railway Co., Ltd.
Location: 1-16-15, Minamiikebukuro, Toshima-ku, Tokyo

2 Name and Type of Business

Name: Seibu Shin-Yokohama Non-Public Heliport Development Project
Type: Establishment of an airfield (non-public heliport)

3 Position of Business

Shin-Yokohama Square Building, 2-3-12 Shin-Yokohama 2-chome, Kohoku-ku, Yokohama (Rooftop of Shin-Yokohama Square Building)

Review opinion

As a result of examining the environmental impact assessment preparation documents, environmental impact assessment documents, and procedures prepared by the business operator, please pay attention to the following matters based on the business characteristics and the environmental characteristics of the surrounding area.

1 Basic matters

（１） This heliport is located in the Shin-Yokohama station area where there are many business-related buildings, and there are public facilities such as hospitals directly below the planned flight route, and construction of residential buildings is underway in the Shin-Yokohama 1-chome area near the flight route. I have. For this reason, when operating helicopters, consideration should be given to minimizing the impact on the surrounding environment based on land use and development conditions in the surrounding area.

（２） The operator conducts helicopter testflights in the survey and strives to improve the accuracy of the survey prediction, but since the testflight is different from the actual operation, it is necessary to conduct a post-survey on the necessary items.

（３） In the future, it is necessary to select models that take into account environmental impacts such as noise and the properties of exhaust gas from the viewpoint of reducing environmental impact.

2. Individual matters

（１） Construction plan

The construction of this project is limited to airfield sign facilities, safety facilities, fire extinguishing facilities, etc. The construction period is short, but there are hotels and commercial buildings nearby, and there are many pedestrians during the day. Therefore, the traffic of construction vehicles and the import of materials should consider the impact on pedestrians, disseminate the construction schedule to nearby stakeholders, and establish a complaint consultation desk for construction.

（２） Noise

The way of feeling the "noisy" of aircraft noise such as ahericopter is related to the surrounding noise and living hours, so take appropriate consideration in the operating hours of helicopters, taking into account the season and surrounding living environment, etc. thing.

Since the effects of noise vary depending on the flight method of the Ihelicopter, flying a helicopter should take a flight method (gradient of entry / exit, etc.) to reduce noise as much as possible.

The hovering and idling of uhericopter may affect the area around this heliport, so the hovering and idling time above this heliport should be minimized.

（３） Safety

There are no serious accidents nationwide at the time of takeoff and landing of Ahericopter, but since it is a heliport in the city area, take thorough measures such as maintenance of aircraft and occupant training from the viewpoint of ensuring safety.

Installation of wind direction and anemometer to confirm the safety of take-off and landing of the Ihelicopter should consider the vortex area of the building.

C) Operation is from 7:00 in the morning to 19:00 in the evening, but if weather conditions such as visibility or wind speed deteriorate, refrain from operating.

3 Ex-post investigation

（１） Noise

The noise survey using test frights is conducted on the safety side in terms of the environment than the actual flight method, but buildings around the heliport are forested, and depending on the location, the reflection of helicopter noise may be affected. After operation, conduct a survey including the effects of noise due to reflection in the area around the heliport, and consider countermeasures as necessary.

(２) Low-frequency sound

There is a concern about the impact on low-rise wooden houses that are partially under the approach surface, so after operation, try to grasp low-frequency sound and take appropriate measures as necessary.

(３) Radio interference

Although there was no radio interference in the test-flight survey, in full-scale operation, try to understand radio interference and consider countermeasures as necessary.

[Reference] Procedure progress

1 Inspection of the Environmental Impact Assessment Preparation Document and Submission of Statement of Opinion

Inspection location: Environmental Protection Bureau General Affairs Department Environmental Impact Assessment Section
Kohoku Ward General Affairs Department Ward Administration Promotion Division
Inspection period: From January 25, 2000 to March 9, 2000
Opinion: Submit 64 copies from 30 citizens, etc.

2 Inspection of Environmental Impact Assessment Report and Submission of Statement of Opinion

Inspection location: Environmental Protection Bureau General Affairs Department Environmental Impact Assessment Section
Kohoku Ward General Affairs Department Ward Administration Promotion Division
Inspection period: From June 15, 2000 to July 14, 2000
Opinion: Submit 13 copies from 9 citizens, etc.

3 Business Briefings

February 4, 2000 from 19:00 to 20:00 attendees 36 Kanagawa Truck Hall
February 5, 2000 from 14:00 to 16:00 attendees 26 Kanagawa Truck Hall

4. Statement of Opinion

April 28, 2000 Two statements of opinion Kanagawa-jichikaikan