Serving Our Clients for 33 Years

Corporate Experience
Staff Experience


Assess the Scientific Rationale for Ozone and Other Air Pollution Standards

Complete List of Scientific Topics in
Table of Contents


Predict Air Quality Exposures Spatially

Kriging


Create Maps that Describe Violation Areas

Free Downloadable Maps


Develop Global Sulfur Emission Estimates

Download Actual Data


Develop Exposure- Dose-Response Relationships

Human Health
and
Vegetation


Develop Ozone Exposure Metrics for Protecting Vegetation

The W126 Ozone Index


Characterize Ambient Air Quality Data 

Biologically Meaningful Characterization


Assess Possible Impacts on Natural Vegetation Areas


Estimate Policy-Relevant Background Concentrations


Characterize Ozone Trends in the United States and Worldwide Background Ozone Signature Monitoring Sites


Critically Evaluate the Limitations of Epidemiological Methodology


Quantify the Co-Occurrence of Air Pollutants Under Ambient Conditions


Collect and Make Available Albert Einstein Quotes


Photograph the Performing Arts


Publish over 125 Peer-Review Papers

A Sampling


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Ozone trends analyses of anthropogenically influenced monitoring sites in the United States and on worldwide background ozone signature monitoring sites   Read the introductory materials and begin the process of better understanding how the science is integrated with the standard-setting processes
Trends in ambient ozone levels in the United States over the past several years illustrate the "flattening" effect.   Learn about the effects of ozone on biological systems and how to characterize hourly averaged ozone concentrations in biologically meaningful terms
US Forest Service applies W126 and N100 kriged ozone data developed by A.S.L. & Associates   Bridging the gap between ozone exposure and ozone dose: The importance of high hourly average concentrations and "effective" dose
President Obama instructed the US EPA to withdraw its proposed human health and vegetation ozone standards.   Learn about background ozone levels and why theoretical modeling estimates underestimate actual background concentrations
  How consistent will the W126 exposure index be if it becomes the form for the secondary ozone standard to protect vegetation?     Co-occurrence patterns of ozone, sulfur dioxide, daily PM-2.5, and nitrogen dioxide
  Background information on the W126 cumulative exposure index     A summary of concerns about the methodology utilized in the epidemiological studies for PM

Click here to read more about our concerns Click here to see our maps

  It is not clear that reducing ozone-causing emissions will result in the attainment of the 8-hour ozone standard at many locations in the US   Review the latest sulfur dioxide, ozone, pm-10, pm-2.5, carbon monoxide, lead, and other maps
  Why a new human health standard may be needed to protect the public from ozone     Compare the Canadian  and U.S. 4th Highest 8-Hour Average Ozone Values for 2007-2009

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Spring in Montana


Osprey
April 2012



Photographing
the Performing Arts
Worldwide

Portfolio 1 - US Symphony
Portfolio 2 - NZ Symphony
Portfolio 3 - Ballet
Portfolio 4 - Arts in Motion

Streaming Audio, Video, Slides, & Digital Photography
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A.S.L. & Associates
302 North Last Chance Gulch, Suite 410
Helena, Montana 59601
406-443-3389
asl@asl-associates.com

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