Document gbdN28raLb3gw6oNpe5dyJVrL

Appendix D. Definition and Description of Factors for Assessing the Need for Corrective Action* D.1 Condition of the Asbestos-Containing Material D.1.1 Factors 1 and 2: Deterioration or Delamination and Physical Damage An assessment of the condition should evaluate: the quality of the installation, the adhesion of the friable material to the underlying substrate, deterioration, and damage from vandalism or any other cause. Evidence of debris on horizontal surfaces, hanging material, dislodged chunte, scrapings, indentations, or cracking are indicators of poor material condition. Accidental or deliberate physical contact with the friable material can result in damage. Inspectors should look for any evidence that the asbestos-containing material has been disturbed: finger marks in the material, graffiti, pieces dislodged or missing, scrape marks from movable equipment or furniture, or accumulation of the friable material on floors, shelves, or other horizontal surfaces. Asbestosrcontaining material may deteriorate as a result of either the quality of the installation or environmental factors which affect the cohesive strength of the asbestoscontaining material or the strength of the adhesion to the substrate. Deterioration can result in the accumulation of dust on the surface of the asbestos-containing material, delamination of the material (i.e., separating into layers), or an adhesive failure of the material where it pulls away from the substrate and either hangs loosely or falls to the floor and exposes the substrate. Inspectors should touch the asbestos-containing material and determine if dust is released when the material is lightly brushed dr rubbed. If the coated surface "gives" when slight hand pressure is applied or the material moves up and down with light pushing, the asbestos-containing material is no longer tightly bonded to its substrate. D.1.2 Factor3: Water Damage ' '''''r ' . Water damage is usually caused by roof leaks, particularly in buildings with flat roofs or a concrete slab and steel beam construction. Skylights can also be significant sources of leaks. Water damage can also result from plumbing leaks and water or high humidity in the vicinity of pools, locker rooms, and lavatories. ^ . . . > Water can dislodge, delaminate, or disturb friable asbestos-containing materials that are otherwise in good condition and can increase the potential for fiber release by dissolving and washing put the binders in the material. Materials which were not considered friable may become friable after water has dissolved and leached out the binders. Water can also act as a slurry to carry fibers to other areas where evaporation will leave a collection of fibers that can become suspended in the air. --.-* - Inspect the area for visible signs of water damage, such as discoloration of or stains on the asbestos-containing material; stains on adjacent walls or floors; buckling of the walls or The information in this Appendix is taken, with modification, from: Brandner, W. October 1982. IAsbestos Exposure' Assessment in Buildings Inspection Manual; Kansas City, MO:U.S. Environ mental Protection Agency, Region VII. GLEASON-OO1120