Ask Dr. ALOHA (PDF versions)

The Ask Dr. ALOHA articles are brief, informational articles designed to help you understand ALOHA better. The articles are available in PDF format below, or in HTML format on the Ask Dr. ALOHA overview page. 

We will continue to write new articles, so make sure to check this page periodically to see if there are any new articles of interest. If you would like to suggest a topic for an Ask Dr. ALOHA article, please send an e-mail to the CAMEO Specialist.

Levels of Concern (LOCs)

• Choosing Toxic Levels of Concern - PDF Version This article contains an overview of toxic LOCs (including AEGLs, ERPGs, and TEELs), a discussion on how to choose toxic LOCs in ALOHA, and some suggestions about when you should use LOCs other than ALOHA's standard values.
  (Document format: PDF, size: 84.6 K)

• Working with Toxic and Odor Thresholds - PDF Version This article describes a scenario where a responder needs to assess a chemical release using both toxic and odor thresholds as LOCs in order to evaluate the threat posed to the public.
  (Document format: PDF, size: 115.5 K)

Concentration Graphs

• Working with the Concentration Graph - PDF Version This article discusses exposure duration and how to use the concentration graph. The concentration graph shows indoor and outdoor concentrations of a chemical in the air at a specific location for one hour after the start of a chemical release.
  (Document format: PDF, size: 100.1 K)

Regulatory Planning Using ALOHA and CAMEO

• Using CAMEO Tools for RMP and EPCRA Hazard Analyses - PDF Version This article provides and overview of how RMP*Comp, ALOHA, and CAMEO's Screening & Scenarios module can be used to complete hazard analyses under the Risk Management Planning (RMP) rule and the Emergency Planning and Community Right-to-Know Act (EPCRA).
  (Document format: PDF, size: 76.7 K)

• Using ALOHA to Perform an RMP Worst-Case Consequence Analysis - PDF Version This article is an example of how ALOHA can be used to perform a worst-case consequence analysis as required under the RMP rule.
  (Document format: PDF, size: 152.1 K)

• Using ALOHA to Perform an RMP Alternative Consequence Analysis - PDF Version This article is an example of how ALOHA can be used to perform an alternative consequence analysis as required under the RMP rule.
  (Document format: PDF, size: 133.4 K)

• How is ALOHA Different than the Green Book? - PDF Version This article discusses some of the differences between the Green Book method and the ALOHA hazard model.
  (Document format: PDF, size: 83.4 K)

For More Information

ALOHA Overview An overview of CAMEO's hazard modeling program.

ALOHA Tools A collection of tools for ALOHA users.