Industrial Hygiene Testing - Clark Testing

Industrial Hygiene Testing

Clark Testing’s Industrial Hygiene Laboratory supports Environmental Health and Safety (EH&S) programs for varying industries. accredited by the AIHA Laboratory Accreditation Programs (AIHA LAP, LLC), we assist customers in selecting the proper NIOSH or OSHA method(s) necessary to carry out the appropriate sampling.

Supporting testing and quality assurance programs for both light and heavy industry, including aluminum and steel production and fabrication, petroleum refining, power generation, and consulting firms, we offer services to meet your needs.

Click here to view our AIHA LAP, LLC laboratory accreditation, #100355, ISO/IEC 17025:2017.

Testing Services:

Crystalline Silica Analysis

Clark provides Crystalline Silica analysis to advise companies if workers are within the permissible exposure limit (PEL) set forth by OSHA.

Samples are prepared and analyzed by X-ray Diffraction according to NIOSH 7500 to quantitatively determine the presence of Crystalline Silica. Analysis is reported as α-Quartz, Cristobalite, and Tridymite; also taking note of any interference in the analysis.

Clark provides sampling and analysis on both air samples and bulk materials. 

Clark is accredited by AIHA LAP, LLC for method: NIOSH 7500

What is Silica and Silicosis?

Metals/Elemental Analysis

Metal Fume and Metal Dust are commonly sampled during personal exposure assessments. Exposure may lead to irritation and in some cases disease; ultimately harming your nervous system and organs. Visit OSHA’s Permissible Exposure Limits for the elements of interest:

All samples are prepared by OSHA and NIOSH approved methods that include hot plate or microwave digestion. The samples are then analyzed to determine the airborne concentration of various metals by means of Inductively Coupled Plasma Spectroscopy (ICP) or Graphite Furnace Atomic Absorption (GFAA).

Routine testing include, but is not limited to:
  • Arsenic, Beryllium, Cadmium, Chromium, Lead, Nickel, etc.
  • Welding Fume Metals (13 metals) profile
  • Elemental Scan (>20 metals)
In addition to air samples, Clark offers elemental analysis on various bulk materials.

Clark is accredited by AIHA LAP, LLC for methods: NIOSH 7102, NIOSH 7302, and NIOSH 7304

What is Beryllium Exposure?

Organic Vapor Analysis

Air samples captured for Organic Vapors are prepared by NIOSH and OSHA methods and analyzed by Gas Chromatography (GC) or Ultra High Performance Liquid Chromatography (UHPLC).

We routinely provide analysis of the following Organic Vapors:
  • Various solvents - Benzene, Ethyl benzene, Toluene, Xylene, etc.
  • Ketones
  • Amines
  • Aldehydes
  • Polycyclic Aromatic Hydrocarbons/Polynuclear Aromatic Hydrocarbons
  • Alcohols
  • Paraffin Wax Fume
  • Total Hydrocarbons
Most Organic vapor sampling requires special handling; notably refrigerator/freezer storage. The Organics Lab also offers special project analysis tailored to meet clients' specific needs.

Clark is accredited by AIHA LAP, LLC for methods: NIOSH 1400, NIOSH 1500, NIOSH 1501,NIOSH 1550, NIOSH 5506, and OSHA 58

What is Organic Vapor Exposure?

Anion Analysis

Using various NIOSH and OSHA approved methods, our laboratory performs routine analysis of anions by Ion Chromatography to determine airborne concentrations.

The most common test requests for anions include:
  • Acid Fumes – Hydrochloric Acid, Nitric Acid, Sulfuric Acid, etc.
  • Sulfur Dioxide
  • Ozone
  • Fluorides – Particulate Fluoride and Gaseous Fluoride
  • Nitric Oxide and Nitrogen Dioxide
In addition, Clark provides the analysis of Hexavalent Chromium. accredited to AIHA LAP, LLC, we follow OSHA ID-215 v2.  According to this method, samples are prepared based on the operation being sampled: Painting Operations, Plating Operations, or Welding/Other Operations. Samples are unstable therefore requirement special handling.

Learn More About Hexavalent Chromium

Gravimetric / Extractions Analysis

We routinely perform Gravimetric analysis on filter cassettes. Doing so provides an air concentration of the particulate matter, by its overall mass captured on the filter with regard to the air volume sampled. Since gravimetric determinations are non-destructive, additional testing may be performed. Such add-on testing may include Silica, Metals, Hexavalent Chromium, or CTPV to mention a few.
  • Gravimetric – Total/Respirable Dust, Welding Fume Particulate
Another common test parameter includes Extractions. We routinely perform extractions on filter cassettes. The methods utilize such chemical solvents as benzene, cyclohexane, acetone, etc.

Common determinations include:
  • Extractions – Oil Mist, Benzene Soluble Fraction/Coal Tar Pitch Volatiles, Coke Oven Emissions
  • Methods NIOSH 0500, NIOSH 0600, and NIOSH 5042 are included in our AIHA LAP, LLC certification. 

Environmental Health and Safety Project Management

Clark Testing and Resolution provide complete end-to-end EHS project management, including program analysis and regulatory compliance. Our team proudly possesses accredited Industrial Hygienist (CIH) and accredited Safety Professional (CSP) credentials as well as industrial hygiene laboratory accreditation through the American Industrial Hygiene Association Laboratory Accreditation Program (AIHA LAP). This combined expertise assures that all projects are managed with the highest focus on integrity, accuracy, and effectiveness.

We provide support for every step of a project – from initial coordination to final report reviews and the development of site action plans after the project is complete. Our team of experts works efficiently and delivers quick turnaround times to help your site meet critical deadlines for Environmental Health & Safety compliance.

Learn More About Environmental Health and Safety Project Management


Clark Testing has partnered with Resolution to ensure regulatory compliance with all applicable sampling, analytical and reporting methodology and standards and to ultimately provide our clients with a turn-key solution that is safe and audit-ready. Clark Testing and Resolution partner together to provide simplicity and reliability in Industrial Hygiene – by choosing to work with us you will have the most qualified team of experts managing this project. Clark Testing provides AIHA-accredited analytical laboratory services and Resolution provides accredited Industrial Hygienist (CIH) and accredited Safety Professional (CSP) project management. Our reports are thorough, accurate and easy to interpret so your employees can stay focused on the items at hand while we handle all aspects of your company’s Environmental Health & Safety needs.

Learn more about Resolution

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Clark Testing has been providing product qualification testing and design verification for manufactures for over 20 years. We provide our clients with independent testing.

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Potential Exposures by Industry


  • Ammonia
  • Nitrogen Dioxide
  • Hydrogen Peroxide
  • Organotin

Hydraulic Fracturing (Fracking)

  • Benzene
  • Methanol
  • Other VOC’s
  • Diesel Particulate Matter
  • Gluteraldehyde
  • Crystalline Silica


  • Polynuclear Aromatic Hydrocarbons (PAH’s)
  • Sulfur Dioxide
  • Benzene, Ethyl benzene, Toluene, Xylene (BETX)
  • Other VOC’s

Welding Operations

  • Nitrogen Dioxide
  • Ozone
  • Welding Fume Metals
  • Hexavalent Chromium

Semiconductors (Fab)

  • Acid fumes
  • Metals
  • VOC’s


  • Respirable Dust
  • Crystalline Silica
  • Diesel Particulate Matter
  • Nitrogen Dioxide

Indoor Environmental Quality

  • Formaldehyde
  • VOC’s
  • Dust

Coking/Smelting process

  • Polynuclear Aromatic Hydrocarbons (PAH’s)
  • Fluorides
  • Sulfur Dioxide
  • Beryllium
  • Coal Tar Pitch Volatiles (CTPV)

Have a question or would like to request a quote? Call 888.325.8517 or Request a Quote