
Asbestos Surveys - What to Look For
Prior to demolition or renovation of a public or commercial building, most municipalities require that the building first be surveyed for asbestos materials. Any asbestos identified must be removed prior to demolition. This is also a requirement of Cal. Title 8 1529 and 29CFR 1926.1101.
Ellis has performed hundreds of asbestos surveys in Torrance, Santa Monica, Redondo Beach, Manhattan Beach, Los Angeles and other cities in the South Bay region. Occasionally we're asked to review asbestos survey reports prepared by other firms.
When reviewing reports prepared by other firms, we often see the same sorts of errors, omissions or deficiencies:
1. Too many reports are needlessly complex and difficult to understand. An asbestos survey report should be written simply, and its sections prioritized like a newspaper.
The most important information - where is the asbestos in my building and what is its condition? - should be first, in the form of an executive summary. This should be followed by brief sections on methodology, a discussion of results, recommendations and a signatory. Appendices should include a table summarizing results, drawings to show sample and asbestos material locations, laboratory results, and so on. You should be able to gain an understanding of the asbestos materials in your building - including their location, quantity and condition - within five minutes of reading your report.
2. Identified asbestos materials MUST be quantified. This is a requirement of AQMD Rule 1403 (among others). Many firms balk at visiting a site a second time merely to calculate quantities of identified asbestos. But doing so is easier and much more efficient than quantifying every sampled material (asbestos and non-asbestos) during the initial survey effort.
3. Differentiate between plaster and wallboard. Too often, a testing agency will find asbestos in joint compound in wallboard, and then include all plaster walls in their recommended abatement scope. This is a mistake that can cost hundreds of thousands in unnecessary abatement costs., and few bidding contractors are likely to point out that mistake.
4. Identify any areas not accessed, and why. We recently were asked to re-survey a defense contractor's primary office facility in El Segundo. During our re-sampling effort, we managed to find 16 different suspect materials that were not identified or sampled in the original survey. The project was stopped when the abatement contractor correctly brought this to the Owner's attention. A thorough survey will include lifting of suspended ceiling tiles, opening attic and wall hatches, lifting carpet to see what's underneath, etc. Of course, complete visual access to all materials would require demolition of walls and floors, something that is rarely possible in an occupied building. But representative areas can usually be accessed, with subsequent assumptions made and defended in the report.
5. Prepare simple CAD drawings to show where asbestos materials are present. Sample location drawings can be useful, but it's the material location drawings that will be used by bidding contractors.
6. Resolve "Trace" Results. California OSHA regulates any material containing greater than 0.1% asbestos by weight. Standard lab analysis methods (PLM) are incapable of achieving this level of accuracy and any results reported as "trace" or "<1%" should be re-analyzed by other methods (either a "1000-point count" or TEM) to accurately assess whether the material must be treated and handled as asbestos.
6. Include photographs of identified asbestos materials. This avoids any misinterpretation of the report.
While not all of the above steps are required when sampling small individual areas or locations, they are a basic requirement of any full-building survey. We're constantly surprised by how often one or more of the above are omitted.
Whether prepared by us or by another firm, if you have trouble interpreting your asbestos survey report, give us a call at 310 544 1837.