<p>US Borax operates a facility which manufactures boron products. Virgin material from their mining operation in Boron, California undergoes a series of material handling processes which require ovens to remove moisture from the material. The equipment at the facility includes two boilers and three dryers fueled by natural gas. The project involves preparation of their Annual Emissions Inventory Report which is required by the South Coast Air Quality Management District (SCAQMD) on an annual basis and&nbsp;calculation of the greenhouse gas (GHG) emissions from the facility&rsquo;s stationary combustion sources to determine if California Air Resources Board&rsquo;s (CARB&rsquo;s) Mandatory Reporting of GHG Emissions Regulation is applicable to the facility. The emissions inventory includes GHGs,&nbsp;5 criteria pollutants, nitrogen oxides (NOx), Volatile Organic Compounds (VOCs), carbon monoxide (CO), sulfur oxides (SOx), and particulate matter (PM), and 23 toxic airborne contaminants (TACs). Within the facility there are numerous complex materials handling processes which create a challenge when determining the emissions of PM. The material being processed at the facility contains trace amounts of arsenic. In addition to the PM emissions the process lines must be evaluated for the arsenic within the dust.</p>