Demolition and environmental remediation projects can disturb materials that have remained untouched for decades. When these materials are cut, removed, broken, or otherwise disturbed, potentially hazardous particles may become airborne. Air monitoring provides an important way to evaluate conditions during the project and determine whether appropriate controls are effectively limiting airborne contaminants.
For contractors, building owners, workers, and occupants, proper air monitoring can play an important role in maintaining a safer work environment. Let’s take a closer look at some things everyone should know.
Identifying Airborne Hazards
Many environmental hazards are difficult or impossible to detect simply by looking at the air. Demolition or remediation work may disturb asbestos-containing materials, lead-containing dust, silica, and other potentially harmful substances.
Air monitoring involves collecting samples that can be analyzed to determine whether certain contaminants are present and, depending on the testing method, their concentration. This provides objective information about conditions at or around the work area rather than relying solely on visual observations.
Protecting Workers During a Project
Workers performing demolition or remediation may face the greatest potential for exposure because they are closest to the materials being disturbed. Engineering controls, containment systems, personal protective equipment, and established work practices can all help reduce exposure.
Air monitoring adds another layer of information by helping assess whether these measures are working as intended. Depending on the project and applicable requirements, monitoring may help identify unexpected exposure conditions that require changes to work practices or protective measures.
Evaluating Containment Measures
Environmental remediation projects often use containment systems designed to prevent hazardous dust and fibers from traveling outside the work area. Plastic sheeting, sealed openings, negative air machines, HEPA filtration, and decontamination areas may all be used depending on the type and scope of work.
Air sampling can help evaluate whether contaminants are escaping the controlled area. If monitoring identifies unexpected airborne material outside containment, contractors can investigate the source and make necessary adjustments.
Helping Protect Building Occupants and the Public
Not every demolition or remediation project occurs in an empty building. Work may take place in schools, hospitals, offices, apartment buildings, industrial facilities, and other occupied properties.
Monitoring can be especially important in these environments because contractors must consider individuals who are not directly involved with the project. Strategic sampling locations can provide information about whether airborne contaminants are migrating into adjacent spaces.
Supporting Regulatory Compliance
Demolition and remediation activities may be subject to federal, state, and local regulations depending on the hazardous material involved and the nature of the project. Agencies such as OSHA and the EPA establish requirements intended to reduce exposure to certain workplace and environmental hazards.
Air monitoring may be required in some situations and can also provide valuable documentation of project conditions. Contractors should understand which sampling procedures, exposure limits, recordkeeping requirements, and clearance criteria apply to the specific work being performed.
Confirming Conditions After Remediation
Air monitoring may also be used near the end of certain remediation projects. Depending on the contaminant and applicable regulations or project specifications, clearance testing can help determine whether an area meets established criteria before containment is removed or the space is returned to normal use.
Ultimately, air monitoring provides measurable information during work where airborne hazards may not be visible. When combined with proper containment, protective equipment, trained personnel, and appropriate work practices, monitoring helps contractors better understand conditions throughout demolition or remediation and respond when additional controls are necessary.
Illinois Environmental Contractors Association Resources
It’s essential to consult with removal professionals and follow local regulations to assess the specific risks and costs associated with your situation. If you suspect the presence of asbestos or lead in your property, the issue needs to be addressed as soon as possible.
For more information on finding a local contractor to assist with asbestos, lead, and other regulated substance information, remediation, or removal, or if you have general questions regarding environmental regulations, check the resources below:
Illinois Environmental Contractors Association Members