NIOSH has published a new recommendation that says attaching a regular shop vacuum to a dust-collecting circular saw can provide a low-cost solution in order to reduce exposure to hazardous dust produced when construction workers cut fiber-cement siding.

According to a press release, the research that led to this finding was conducted in two phases. In one, researchers looked at three dust-collecting circular saws connected to an external vacuum in a laboratory setting. Further studies were conducted at construction sites where workers were cutting fiber-cement siding. Results of the field studies showed that a regular shop vacuum controlled the amount of silica-containing dust in the air to well below the NIOSH-recommended exposure limit for respirable crystalline silica.

Read entire article - http://www.cdc.gov/niosh/updates/upd-06-18-15.html