Document 0JYRLQ61m4Ze7Qv3Rp4zBgxRJ

ST0460822 PLAINTIFF'S EXHIBIT Page 1 IIEOTIFICATICN OF ASBESTOS CONDONING MATERIALS IN BUILDINGS Conducting the Survey Begin by reviewing building records to see if ACM was specified at any stage. Although building records are often unreliable, they are a useful starting point. Check the original plans, shop drawings, remodeling records, and work change orders. Appendix A is a list of the most earner uses and types of ACM in buildings since 1960. If any of these items appears in the records, assume that asbestos is in the building. Identify ACM mentioned in building records by type: (1) troweled- or sprayed- on surfacing material, (2) pipe and boiler insulation, or (3) other miscellaneous ACM. Next, inspect the building for ACM Identified in the building records. Determine if the materials are friable and records the findings. They may be sanpled and analyzed to confirm the presence of asbestos. Thoroughly inspect all areas of the building for friable materials and sanple them. The specific procedures for inspection and sampling vary depending on which of the three types of material are involved. The sanpler of building materials should wear a respirator to prevent inhalation of fibers. Procedures for Sprayed- or Troweled-on Surfacing Materials Surfacing materials can be friable or nonfriable. Friable forms are either very fibrous and fluffy (sometimes like cotton candy) or granular and cementitious. (See Figure 1.) Since friable materials are more likely than nonfriable materials to release fibers when disturbed, the first priority is to identify those friable surfacing materials that contain asbestos. The first step is to locate ACM specified in building records and determine it friability. Then, identify all friable surfacing materials in the building and take samples to be analyzed for asbestos. Surfacing Materials Identified as ACM in Building Records Begin by locating any acoustical plaster or ether surfacing materials that, according to building records, ocnt&in asbestos. Itab these materials to see if they enable or produce a llcpit powder. If so, consider them friable. (Wien disturbing material that may contain asbestos, the inspector should wear protective equipment.) Sanple and analyze these materials as discussed below. Record the location and degree of friability. ST0460822 ST0460823 Other Surfacing Materials That May Contain Asbestos Page 2 of 3 Conduct a thorough building inspection for friable materiels on walls, ceilings, beans, ducts, and any other surface. Rub the material to see if it is friable. Group any friable naterial into "homogeneous" areas for further study. A homogeneous area contains friable material that seem by texture and color to be uniform. If materials appearing uniform were installed at different times, designate the two materials as distinct homogeneous areas. Once homogeneous areas of friable materials have been delineated and recorded on floor plans, collect samples of the materials and send them to Analytical Services for analysis. Record the results of the sanpling and analysis program and save the records indefinitely. If no asbestos is found in these materials, no further action is necessary. Procedures for Pipe and Boiler Insulation Asbestos-containing insulation is found on equipment containing hot air or liquid - pipes, boilers, tanks, and fyiretlmes ducts. These insulation materials may be a chalky mixture of magnesia and asbestos, preformed fibrous asbestos wrapping, asbestos fiber felt, corrugated paper, or insulating cement. In most cases, the insulating naterial is covered with a protective jacket of doth, tape, paper, metal or cement. (Insulation with pink or yellow wrap is usually a dear indication of fibrous glass rather than asbestos material. However, pipe elbows and joints will likely contain asbestos.) Sample the insulation materials from the damaged or exposed ends or other parts. Procedures for sanpling and analyzing insulation materials are similar to those far surfacing materials: * Identify homogeneous areas (i.e., sections of insulation that appear unifcom in cdcr and texture). * Take samples far each homogeneous area where the insulation is damaged or exposed. Remeeber, all persons taking samples should wear a respirator. * Submit samples to Analytical Services far analysis. The presence or absence of asbestos should be documented in permanent records. ST0460823 ST0U6082U Page 3 of 3 Procedures for Other ACM Most ACM in this category (a.g., wallboaxd, ceiling tile, floor tile) is hard and nonfriable, and sampling wauld damage it and release fibers needlessly. Information on asbestos in these materials ocmes mainly from building records or building personnel. Docwent the presence and location of these materials in permanent records. Although nonfriable asbestos is of less immediate concern; it should not be ignored. Fibers will be released if nonfriable material is cut, drilled, or broken during building repairs or renovation. ftatential Fiber Release The need for asbestos monitoring depends cn the likelihood of fiber release from the asbestos containing material. The possibility of fiber release should be assessed by evaluating the material's condition, physical characteristics and location. If water or physical damage, deterioration, cr delamination of the material is evident, then fiber release has occurred, is occurring, or is likely to occur. The appearanoe of the material and the presence of broken or crumbled material on horizontal surfaces indicate fiber release. Visible, highly accessible materials In areas frequently used or needing periodic maintenance are most vulnerable to physical damage. Also in this category are materials subject to vibration frcn mechanical equipment. ACM in an air plerun or near a forced airstreaan (e.g., air frca a heating vent) is likely to suffer surface erosion. In addition, fibers released into an airstream may be transported to other parts of the building, possibly exposing mere people. Any planned changes in building use should also be considered when assessing potential fiber release. lr 10/14/86 ST0460824 t { ) Friable, fluffy sprayed-on material Friable, cementitious sprayed-on or troweled material (acoustical plaster) STQ460825 Nonfriable wallboard with friable sprayed-on material behind Pipe legging Flgur# 1. Examples ol asbestos-containing materials tound In buildings. 1-3 ST0460825 ST0460826 Figures. Asbestos-containing material located above a suspended celling. S-2 ST0460826