CSS employee owners supporting the Environmental Protection Agency’s (EPA) Scientific and Technical Assistance for Consequence Management (STACM) contract have been working with the National Chemical Preparedness Workgroup and Sub Workgroups to create a decontamination (decon) line guide and detailed drawing for EPA on-scene coordinators and EPA’s special teams to use for emergency responses and incidents. The decon line guide and drawings presents a detailed approach and steps to decon responders for different levels of personal protective equipment (PPE) (A, B, C, and D) used during responses to dangerous chemicals in the field. The decon guide includes the steps and lists of equipment and materials needed to put together a decon line with most equipment commercially available off-the-shelf (COTS). CSS scientists developed the steps, guide, and drawings.   

Following the development of the decon line guide, CSS scientists demonstrated the lines for EPA on-scene coordinators and special teams by directing the EPA responders through the line providing verbal instruction to ensure they followed all steps. 

One critical step in an effective decon line is to screen each responder to ensure that no dangerous chemicals remain on their personal protective equipment (PPE). During the decon line demonstration, CSS scientists screen EPA responders with a chemical monitoring instrument to ensure all chemicals were removed. Following the decon, if CSS scientists detect chemicals on the PPE, they instruct the responder to return to the beginning of the decon line to repeat the process.  

The line guide, processes, and demonstrations are critical in ensuring EPA responder safety when responding to dangerous chemicals in the field. 

Five people wear personal protective gear. Two stand in decontamination trays while three people provide assistance.
Two EPA responders (on the left) in modified Level C personal protective equipment are moving through a level C decon line for dangerous chemicals during a demonstration.
Two people wear personal protective gear. One person stands in a decontamination tent while another stands outside.
A CSS Scientist prepares to screen an EPA responder with a chemical monitoring instrument to ensure all chemicals have been removed in the decon line.

See More CSS Insights

Bee on a flower

Developing a Database for Ecosystem Service Models 

CSS scientists have been major developers and contributors to the online U.S. Environmental Protection Agency’s EcoService Models Library (ESML) database since its inception in 2012. The ESML database contains detailed but concise descriptions of ecosystem service models to facilitate the selection of models by ecosystem scientists for a variety of management and research applications. The…

Entrance to an abandoned mine in a hillside

Assessing Contamination in Abandoned Mines

CSS supports the Environmental Protection Agency with assessing contamination within abandoned mines. There are thousands of abandoned mines throughout the western United States. Many of these mines are leaching heavy metals into nearby streams or have contaminated soils causing vegetation die off.   CSS employee owners conduct field work to assess the extent of this contamination.…

Two lifts in a clean warehouse

Maintaining Clean and Quality Control Standards

CSS delivers specialized cleanroom services for aerospace and other mission-critical environments. Our trained teams of employee owners safely operate high-reach industrial equipment around sensitive flight hardware and ground support equipment while maintaining strict cleanliness and contamination-control standards.  From ongoing cleanroom maintenance and site-specific protocol development to workforce training, CSS provides the expertise needed to support safe, clean, and operationally ready facilities.