Protective breathing apparatuses and level C HAZMAT suits must be worn by all personnel on-site, to help facilitate better breathing in the compromised environment and to prevent spiders 'hitching' a ride out of the park.
Don't like this sentence. Would be perhaps better as.
All personnel entering containment zone is required to wear level C hazardous materials protection, due to presence of fine particulate contaminants. Upon departure, a standard decontamination procedure (as per document FSP0371-D-B-07) is to be undertaken to prevent uncontrolled spread of SCP-1006.