Krakow, 29'09'2006

1
Krakow, 29.09.2006

• Asbestos reduction and measuring conference at
  AGH University
• - Experiences with 1000 F/m³ and SEM method -
• H.-D. Bossemeyer, Dipl. Ing.

2
General Situation

• Import of crude asbestos and occupational
  diseases being announced / regulated

3
Situation by Regulations

• Dangerous Substances Decree (Gefahrstoffverordnung
  ) prohibition of production and usage
  (Allowance of Removal Companies - App. III
  Nr.2.4.2 Abs. 4 )
• Emission Protection Law (BImSchG) lt 1000 F/m³
  (for outdoor areas and 3rd party indoor)
• Asbestos Guideline (Asbest-Richtlinie)
  Obligation of Abatement of weakly absorbed
  products as a technical construction standard
• Technical Rule of hazardous substances (TRGS)
  519 professional knowledge, methods of
  abatement, maintenance and demolition work

4
Labour safety

• Asbestos Guidelines (Asbest-Richtlinie)
• for weakly absorbed products as a technical
  construction standard
• Obligation of Abatement
• Assessment of abatement priority (3 steps) acc.
  mathematical scheme, in the meantime ltlt 1000
  F/m³ (SEM)
• Technical Rule on hazardous substances (TRGS 519)
  professional knowledge, methods of abatement,
  demolition or maintenance work ion
• TRGS 900 definitely carcinogen (K1)

5
Measurment acc. VDI 3492

• New VDI 3492 on 10/2004
• SEM magnification (12000 2500) delivers an
  approximately comparable optical microscope
  result due to the epidemiological dose response)
• WHO fibre counting rules (L gt 5µm, Q lt 3 µm, LQ
  gt 31)
• SEM method based on ISO 14 966

6
VDI 3492 basic parameters

• 8 hours sampling acc. working day
• 3,6 m³ air if 2,2 cm Ø gold vaporized capillary
  pore filter (2l / cm² x min)
• Investigation of 1 mm² filter surface with
  magnification of 1 2000 2500
• planning directions of number of measuring points
  
• Fibre deposit resuspension
• Different measurement objectives

7
Fibre Pollution Examples

• Damage of a night electric stack heater within
  pap insulation 100 000 F/m³
• Shocking such heater with old fibres released
  inside lt 1000 F/m³
• Electric maintenance work in contaminated ceiling
  space 1 5 000 F/m³
• maintenance work with robbing though dusty
  technical installation areas 5 20 000 F/m³
• Winning small samples out of an light weight
  plate lt 300 F/m³ (8h sampling)
• Releasing damaged plates in fire protection
  shutters 1 10 000 F/m³
• Air Leakages of abatement encoverings or asbestos
  plate coverings1-5 000 F/m³

8
economical aspects

• 8 h time of sampling under supervision or with 2
  times access (overnight)
• Transport to laboratory under short time demand
  (abatement work flow)
• Preparation and investigation of the filter in 1
  hour first result, app. 3 4 filters/h
• one or better two SEM with 2 3 operators in 2
  rooms in a laboratory background
• Price level all inclusive (but without access!)
  from 150,- to 500,- each, depending on number
  of measures and market
• Possibility of other measures. e.g. dust sediment
  investigations, fibre containing materials, other
  fibres such as MMMF, corrosion on metals,
  microstructure analysis of textiles and other
  items more.