OBJECTIVE ASSESSMENT OF POTENTIAL EXPOSURE

We evaluate the circumstances surrounding cutting, drilling, sanding, demolition, or other disturbance of known or suspected hazardous materials. The assessment considers the material involved, work performed, location, duration, and conditions present during and following the event 

Potential pathways are evaluated to determine how airborne particles or contamination may have traveled from the work area. This may include occupied spaces, HVAC systems, adjoining rooms, surfaces, and other areas potentially affected by the disturbance. 

 Air, dust, and surface samples may be collected when appropriate to evaluate environmental conditions following a disturbance. Sampling strategies are developed based on the contaminant of concern, site conditions, work activities, and objectives of the assessment. 

Available information regarding work practices is reviewed, including containment, ventilation, respiratory protection, HEPA filtration, wet methods, housekeeping, and other engineering controls that may have influenced contaminant release or migration. 

 Site conditions are documented through photographs, field observations, measurements, sampling locations, and other relevant information. This creates a clear record of conditions observed during the assessment and supports interpretation of laboratory findings. 

Laboratory results and field observations are evaluated together to determine what the available evidence indicates about environmental contamination and the potential for exposure. Findings are presented clearly, with appropriate limitations, to support informed decisions regarding additional testing, cleaning, clearance, or other corrective actions.