Transcript 20140626 high-temp-thermal-destruction

Target facilities (buildings)
Building for filtering process
First floor of the building
Building for drum washing process
Second floor of the building
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Target facilities (High temperature thermal destruction equipment)
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Environmental assessment of the surrounding area (2014)
On the boundaries of the Plant (4 points) : No PCBs detected Dioxin is less than the environmental standard
Analysis of soil
Target of
survey
PCBs
Analysis of ambient air
Dioxins
(pg-TEQ/g)
PCBs
（μg/m3)
Dioxins
(pg-TEQ/m3）
Elution
(mg/ℓ)
East
Not detected
Not detected
7.1
Not detected
0.029
West
〃
〃
5.4
〃
0.025
South
〃
〃
1.4
〃
0.035
North
〃
〃
1.3
〃
0.022
quantitation
limit
0.1
0.0005
soil
containment
(mg/kg)
Env. Standard
1000pg‐TEQ/g
0.05
Env. Standard
0.6
pg-TEQ/m3
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Environmental assessment of High temperature thermal
destruction facilities (2014)
付着物
高温熱分解施設
拭き取り試験
PCB：不検出
PCB：不検出
ﾀﾞｲｵｷｼﾝ：0.026 ng-TEQ/g
ﾀﾞｲｵｷｼﾝ：0.058 ng-TEQ/g
No.1～No.3
廃 PCB タンク
タンク気相部
タンク気相部
タンク気相部
PCB：59 μg/m3
PCB：670 μg/m3
PCB：380 μg/m3
タンクエリア土間コンクリート
拭き取り試験
PCB：不検出
PCB：不検出（３ヶ所）
施設内土間コンクリート
PCB：不検出（２ヶ所）
ﾀﾞｲｵｷｼﾝ：0.0005 ng-TEQ/g
No.4 廃 PCB タンク
ドラム洗浄建屋
ろ過装置建屋
PCB：不検出
作業環境測定
タンク内気相部
PCB：260μg/m
拭き取り試験
各階の壁・床
PCB：検出（5μg/m3）
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（作業環境評価基準以下）
作業環境測定
PCB：不検出
建屋内土間コンクリート
PCB：不検出（２ヶ所）
図 2.2-1
対象施設の事前調査結果まとめ
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Curing method
・Be sure to cover the whole surface of waste PCB storage tanks and drum washing
building (covering the entire surface method)
・Curing must be formed in dual structure
・Set changing room (used for workers going in and out) and front room (used for
vehicles going in and out)
・This curing method should be designed in compliance with “guidelines for
structural performance of buildings with a limited term”.
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Demolition work
(1) Faithfully follow the “Outline on countermeasures against exposure to dioxins”,
refer to the dismantling method manual and design the plan
(2) Try hard to find the way without using fire
(3) Put PCB waste to a sealed container like “bakkan” (detachable container) or oil
drum shown below in the cured place
(4) Below is the main steps for demolition work (high temperature decomposition
facilities are demolished in regular way)
Preceding work
Set curing and environment related equipment
・Treat gas phase portion of equipment with activated charcoal
・Clean the bottom part of equipment
Bakkan
(detachable
container)
Conduct demolition work
( dismantle →store → carry )
Remove the inner sheet of curing
Remove the curing and environment related equipment
An oil drum
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Storage and treatment of wastes
(1) All the PCB wastes should be kept and managed in compliance with the law
Any equipment with no PCBs detected should be disposed according to Waste
Management and Public Cleansing Law
(2) Estimated wastes containing PCBs
1) Waste PCBs supplying equipment within the area of high temperature thermal
destruction facilities
2) No.1 – No.4 Waste PCBs tanks & drum washing building
3) Any devices which has contact with PCBs within the filtering device building
(3) The storage cabinet to keep PCBs waste
1) Newly build a storage cabinet to keep PCBs waste near filtering device building
2) The storage cabinet should have the strong structure to bear against the
estimated Earthquakes in Yamasaki Fault zone and Tsunami height of Nankai Trough
Earthquake in Takasago city
3) The new storage cabinet should be designed and constructed along with the
Building Structure Law (verify to be proof against Earthquakes in Yamasaki Fault zone)
4) Because the surroundings of the storage cabinet is located T.P.+3m or more, any
estimated tsunami height of Nankai Trough Earthquake will not reach the area
( Prefecture : T.P. +2.3m, National government : T.P. +3m)
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PCBs waste storage cabinet
・PCBs waste storage cabinet is planned to be constructed next to filtering device
building
Planned new
PCBstorage
廃棄物保管庫
設置予定地
cabinet construction
site
Planned
use as
PCBto廃棄物保管庫
storageとして活用予定
cabinet Currently used as
filtering device building
Planned PCBs waste storage
construction site
図 7.2-1cabinet
PCB 廃棄物保管庫予定地
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Environment Monitoring Plan
(1) Environmental Survey of surrounding area
Survey point
target
4 points on the
boundaries of the
Plant
soil
Ambient
air
items
Survey time
(containment, Just before the beginning of
preparatory work: once
elution)
During construction work: once (June)
Dioxins
After the PCBs waste storage related
work completed: once
ditto
PCB concentration
Dioxins
PCBs
(2) Environmental Survey of surrounding area of target facilities
Survey point
target
4 points on the soil
outer
periphery
curing + 1 point at
the
outlet
of
negative pressure
dust collector
Ambient
air
items
Survey time
PCBs (containment, Just before the beginning of preparatory
elution)
work of demolition: once
Dioxins
During demolition work: once after 1
month passed & once (June)
After demolition completed(after removal
of curing etc.): once
PCB concentration
ditto
Dioxins
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Environmental survey ( Monitoring point)
全覆養生による養生範囲
通常養生による養生範囲
ドラム洗浄建屋
負圧集じん機
高温熱分解施設
No.1～No.3 廃 PCB タンク
Area where target
facilities located
建屋を利用した養生
Sampling points
ろ過装置建屋
図 8-2
環境モニタリング地点（対象施設周辺）(1)
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