Andrew F. Oberta, MPH, CIH

The Environmental Consultancy

900 Route 620 South, Suite C101, M/S 101
Austin, TX 78734
(512) 266-1368

Consulting, litigation support and training services, and asbestos training and information technology products, for the control of hazards from asbestos-containing materials
Asbestos guru
Click on my picture for my biographical summary including a list of publications and presentations
This site last updated on
August 21, 2018
Surplus equipment and supplies
for sale and free
Asbestos Litigation Support and Expert Witness Services
Attorney inquiries invited

Releasability of asbestos fibers from weathered roof cement

Andrew F. Oberta, Lee Poye, and Steven P. Compton

The study described in the article demonstrated that asbestos fibers released from weathered roof cement are not coated (or “encapsulated”) with asphalt. It describes an innovative use of the ASTM D5755 microvacuum method and concludes with important advice for worker protection.

Published on May 21, 2018 in the June issue of the Journal of Occupational & Environmental Hygiene. The citation is

Andrew F. Oberta, Lee Poye & Steven P. Compton (2018) Releasability of asbestos fibers from weathered roof cement, Journal of Occupational and Environmental Hygiene, 15:6, 466-473, DOI: 10.1080/15459624.2018.1448401



For abstract and full article click here
For further information on the study and the article click here

ASTM D7886 Standard Practice for Asbestos Exposure Assessments for Repetitive Maintenance and Installation Tasks

What it is -- how to use it


The most widely-used asbestos material in the world

Read the Myths and Facts about asbestos-cement

See my presentation on YouTube

Pump, rotameter, cassette or Pump, cassette, rotameter: Does it matter? More than you could possibly want to know about HEPA Filtration


Wallboard: It’s more than joint compound Find out why


I welcome your inquiry by e-mail to

Asbestos Awareness Training Programs

These programs cover topics required by EPA AHERA regulations and the OSHA Construction Industry Standard for Asbestos.
• Asbestos Awareness – Do Not Disturb is available on DVD in English for $189.
• An asbestos awareness program on DVD is available in Spanish for $159.

Click here to preview and order

Read my NEW book -- updated and expanded!

ASTM Manual on Asbestos Control: Surveys, Assessment, Abatement, and Maintenance, 3rd Edition

Covers these topics and ASTM standards*

Building surveys for ACM (ASTM E2356)
Assessment of ACM (ASTM E2356)
Removal of ACM (ASTM E1368, ASTM E2356)
Encapsulation of ACM (ASTM E1494)
Settled dust sampling (ASTM D5755, ASTM D7390)
Exposure assessments (ASTM D7886)
Asbestos cement products (ASTM E2394)
Vermiculite insulation
Naturally occurring asbestos
Asbestos in soil (ASTM D7521)

350 page on-line publication for only $97 from ASTM International

Click here for more information (but please return to this site)

* not included with Manual -- available at

Andy Oberta is an asbestos guru -- and a former rocket scientist. He holds the unique combination of Aeronautical Engineering and Master of Public Health degrees. An internationally-recognized expert on asbestos control, he provides special consultation services for problems and projects of an unusual or confidential nature, expert witness services for litigation related to asbestos health effects and the management of asbestos-containing materials, and asbestos training services and products.

Andy is Certified in Comprehensive Practice by the American Board of Industrial Hygiene and is accredited according to EPA asbestos regulations as an Inspector, Management Planner and Project Designer for schools and for public, commercial and industrial buildings. He was licensed as an asbestos consultant in Texas from 1995 to 2017.

Andy is a Past-President of the Environmental Information Association, chaired the AIHA Asbestos Subcommittee and is an AIHA Fellow. He is the technical contact responsible for five asbestos control standards under the jurisdiction of ASTM Sub-committee D22.07 on Sampling and Analysis of Asbestos and was chairman of the ASTM Task Group on Asbestos Management that developed these standards. Andy Oberta is the author of the ASTM Manual: Asbestos Control: Surveys, Assessment, Abatement and Maintenance: 3rd Edition, which explains the use of these standards.

Andy Oberta supports the activities of the Environmental Information Association (, ASTM International (, the Asbestos Disease Awareness Organization ( and the Texas Hill Country Section of the American Industrial Hygiene Association

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