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Our Environmental Expertise

TEM Environmental, Inc. operates a full service asbestos testing laboratory and has been providing asbestos analytical services since 1985. The heart of our laboratory is a JEOL 1200EX transmission electron microscope (TEM) used to identify asbestos fibers in a variety of samples.


The lab is accredited by the National Voluntary Laboratory Accreditation Program (NVLAP 101130-0) for the analysis of asbestos in bulk and air samples. The lab also participates in a proficiency testing program for fiber counting by phase contrast microscopy operated by the American Industrial Hygiene Association. Learn more about our testing capabilities below.

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Phase Contrast Microscopy

Precise Airborne Asbestos Fiber Analysis

Airborne asbestos fibers present significant health risks, particularly in occupational and construction environments. TEM Environmental, Inc. provides asbestos air analysis using Phase Contrast Microscopy (PCM), a reliable and widely accepted method for measuring airborne fiber concentrations. Our accredited laboratory ensures timely, accurate results to help you meet safety standards and regulatory compliance requirements.

  • Phase Contrast Microscopy (PCM) is the standard method for quantifying airborne asbestos fibers in compliance with OSHA regulations using NIOSH approved test methods. This technique uses optical microscopy to detect and count fibers collected on air sampling filters. While PCM does not differentiate asbestos fibers from non-asbestos fibers, it remains a trusted method for measuring airborne fiber concentrations to evaluate workplace safety.

  • Air Sampling Filter Analysis

    We analyze air sampling filters collected during asbestos-related activities to measure fiber concentrations. Samples are prepared and analyzed using NIOSH Method 7400, which meets OSHA compliance standards.

    Workplace Monitoring

    PCM analysis is used for personal exposure monitoring, ensuring workers’ airborne fiber exposure remains within OSHA’s permissible exposure limits (PELs).

    Ambient Air Monitoring

    Ideal for clearance testing or monitoring air quality during abatement, demolition, or construction projects involving asbestos-containing materials (ACMs).

    Timely Reporting

    Results include fiber counts, concentrations in fibers per cubic centimeter (f/cc), and a detailed analysis of conditions during sampling, all delivered promptly to meet project timelines.

  • During Asbestos Abatement

    To monitor air quality and ensure containment measures are effective.

    Post-Abatement Clearance Testing

    To confirm that airborne fiber levels are within safe limits before re-occupancy.

    Worker Exposure Monitoring

    To comply with OSHA standards and protect worker health.

    Baseline Air Quality Assessments

    To establish reference air quality levels in facilities or environments suspected of asbestos contamination.

  • OSHA Standards

    PCM is the required method for compliance with OSHA’s permissible exposure limits (PELs) for airborne fibers in workplaces.

    NIOSH Method 7400

    We follow this recognized standard for fiber counting and reporting.

    EPA and Local Standards

    We provide data to meet additional federal and local regulatory requirements for asbestos air monitoring.

  • Professional Laboratory

    Our laboratory meets rigorous standards for asbestos fiber analysis, ensuring reliable and compliant results.

    Experienced Analysts

    Qualified professionals with extensive expertise in asbestos air monitoring and analysis.

    Fast Turnaround

    Timely results to support your project’s schedule and regulatory deadlines.

    Detailed Reporting

    Comprehensive reports provide clear fiber counts, concentrations, and recommendations for managing airborne risks.

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Protect Health and Ensure Compliance

Accurate measurement of airborne asbestos fibers is essential to safeguarding health and meeting regulatory standards. TEM Environmental, Inc. provides professional PCM analysis to support your asbestos air monitoring needs.

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Polarized Light Microscopy

Accurate Identification of Asbestos in Building Materials

Asbestos-containing materials (ACMs) pose significant health risks and require precise identification for effective management and regulatory compliance. At TEM Environmental, Inc., we utilize Polarized Light Microscopy (PLM) to analyze bulk samples for asbestos content. Our NVLAP-accredited laboratory (Lab Code 101130-0) in Glendale Heights, Illinois, provides reliable and timely results to support your environmental safety needs.

  • Polarized Light Microscopy (PLM) is a standard method for detecting and identifying asbestos fibers in bulk building materials. By examining the unique optical properties of fibers under polarized light, PLM can determine both the presence and type of asbestos, such as chrysotile, amosite, or crocidolite.

    This technique is effective for analyzing materials like:

    • Thermal system insulation

    • Spray-applied plasters and coatings

    • Floor and ceiling tiles

    • Construction adhesives and caulks

  • Bulk Sample Analysis

    We perform visual estimations using EPA Method 600/R-93/116 to test bulk building materials for asbestos content. This widely used method is suitable for most sample types.

    Point Counting

    For samples with low asbestos concentrations, we conduct a detailed 400-point count analysis to increase accuracy and comply with NESHAP regulations. This technique has a detection limit of 0.25%.

    Gravimetric Reduction

    For non-homogeneous samples like soil, sand, and non-friable organically bound (NOB) materials like floor tile and mastic, we apply gravimetric reduction methods, such as the New York State Department of Public Health Laboratory Method 198.6, to accurately identify and quantify asbestos content.

    Soil and Sand Sample Analysis

    Recognizing the unique challenges of non-homogeneous samples, we tailor our analytical approach to determine the presence and quantity of asbestos in soil and sand, ensuring accurate results.

  • Accredited Laboratory

    Our lab participates in AIHA Proficiency Testing Program (PAT) and the AIHA Asbestos Analyst Registry (AAR) programs, ensuring adherence to industry standards.

    Experienced Analysts

    Our certified professionals possess extensive expertise in asbestos identification and analysis, providing you with dependable results.

    Comprehensive Reporting

    We deliver detailed reports that include findings, methodologies, and recommendations for managing identified ACMs.

    Client Support

    We work closely with you to understand your specific needs, offering guidance and support throughout the analysis process.

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Ensuring Safety and Compliance

Accurate identification of asbestos in building materials is crucial for protecting health and ensuring compliance with regulations. Our PLM analysis services provide the essential information needed to manage asbestos risks effectively.

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Transmission Electron Microscopy

Advanced Airborne Asbestos Fiber Analysis

When precision and differentiation are required, Transmission Electron Microscopy (TEM) is the gold standard for airborne asbestos fiber analysis. TEM Environmental, Inc. offers TEM analysis to accurately identify and quantify asbestos fibers in air samples, ensuring compliance with stringent regulations and providing peace of mind for property owners, contractors, and environmental professionals.

  • Transmission Electron Microscopy (TEM) is a highly sensitive technique used to detect and identify asbestos fibers at the microscopic level. Unlike Phase Contrast Microscopy (PCM), TEM can distinguish between asbestos and non-asbestos fibers and identify specific asbestos types, such as chrysotile, amosite, or crocidolite. TEM analysis is particularly valuable for projects requiring precise, detailed analysis of airborne fibers.

  • Air Sampling Filter Analysis

    We analyze air samples collected during abatement, demolition, or construction projects to detect asbestos fibers using EPA-approved methods, such as EPA 40 CFR Part 763, Subpart E, Appendix A.

    Post-Abatement Clearance Testing

    TEM analysis ensures the area meets EPA clearance criteria after asbestos abatement, providing assurance that the environment is safe for re-occupancy.

    School and Public Building Compliance

    TEM is the required method under the Asbestos Hazard Emergency Response Act (AHERA) for air clearance testing in schools and public buildings.

    Ambient Air Monitoring
    • Ideal for sensitive environments or projects requiring detailed fiber differentiation and asbestos type identification.

    Accurate Reporting

    We provide detailed reports, including fiber counts, asbestos types, and concentrations in structures per square millimeter (s/mm²) or fibers per cubic centimeter (f/cc), depending on regulatory requirements.

  • School and Public Building Projects

    Required by AHERA for post-abatement clearance.

    Post-Abatement in Sensitive Environments

    Ensures thorough validation of air quality in critical areas.

    High-Precision Needs

    Projects requiring asbestos type identification or differentiation between asbestos and non-asbestos fibers.

    Regulatory Compliance

    Meets EPA and local guidelines for advanced asbestos air monitoring.

  • EPA Requirements

    TEM is required under AHERA for schools and public building clearance testing.

    NESHAP Compliance

    TEM analysis meets the National Emission Standards for Hazardous Air Pollutants (NESHAP) standards for asbestos.

    Local Standards

    Complies with additional state and local requirements for air quality monitoring.

  • Accredited Laboratory

    Our laboratory adheres to rigorous standards for TEM asbestos analysis, ensuring reliable and precise results.

    Experienced Analysts

    Qualified professionals with advanced expertise in transmission electron microscopy and asbestos identification.

    Detailed Insights

    TEM analysis provides critical data, including asbestos type and fiber structure, for informed decision-making.

    Fast Turnaround

    We prioritize timely results to meet your project deadlines and regulatory requirements.

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Ensure Safety with Advanced TEM Analysis

Protect the health and safety of building occupants and workers with TEM Environmental, Inc.’s professional TEM analysis services. Our advanced capabilities ensure precise identification and quantification of airborne asbestos fibers for the highest level of compliance and assurance.

Client Samples

Clients can drop samples off any time of the day or night using a convenient sample drop box in our front door or ship samples to our office address.

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