Welcome to Gray Sky Solutions, an air pollution research consulting firm specializing in particulate matter (PM) and visibility issues.  Managed by Dr. H. Andrew Gray, it is the goal of Gray Sky Solutions to provide the highest quality expertise and service.  Dr. Gray can be reached in San Rafael, CA by telephone at (415) 472-0960 or by fax at (415) 472-0959.
 

Gray Sky Solutions is available to assist public and private clients on a wide range of
research problems, including:

• development of State Implementation Plans (SIPs) for PM
• dispersion modeling protocols and applications
• receptor modeling including Chemical Mass Balance (CMB) and factor analysis
• emission inventory development and evaluation
• regional and local scale visibility assessments
• critical review of PM and visibility related research documents
• litigation support

Gray Sky Solutions looks forward to hearing from you!

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