Testing that Reaches the World
Industrial Hygiene Testing
Clark Testing provides comprehensive Industrial Hygiene (IH) laboratory and consulting services to support Environmental Health and Safety (EHS) and OSHA compliance programs across a wide range of industries. Accredited by the AIHA Laboratory Accreditation Programs (AIHA LAP, LLC), our laboratory delivers defensible, regulator-ready data using approved NIOSH and OSHA methods.
In partnership with Audemus, Clark Testing offers an integrated approach that combines industrial hygiene sampling, laboratory analysis, regulatory expertise, and project management under a single coordinated program. This structure allows clients to reduce administrative burden while improving compliance outcomes.
Industrial Hygiene Expertise You Can Rely On
We assist safety managers, industrial hygienists, consultants, and operations teams in selecting the appropriate sampling strategies and analytical methods to evaluate worker exposure and maintain compliance with OSHA Permissible Exposure Limits (PELs).
Our services support both light and heavy industry, including:
- Aluminum and steel production and fabrication
- Petroleum refining and fuel handling
- Power generation and utilities
- Manufacturing and processing facilities
- EHS and industrial hygiene consulting firms
Industrial Hygiene Testing Services
Crystalline Silica Analysis
Clark Testing provides Crystalline Silica analysis to determine whether employee exposures are within OSHA‑regulated limits.
- Samples prepared and analyzed by X‑ray Diffraction (XRD) in accordance with NIOSH 7500
- Quantitative reporting of α‑Quartz, Cristobalite, and Tridymite
- Identification of analytical interferences
- Analysis of air samples and bulk materials
Clark Testing is AIHA LAP accredited for NIOSH 7500
Environmental Health and Safety Project Management
Clark Testing, in partnership with Audemus, delivers end‑to‑end Industrial Hygiene and EHS project management through our Compliance Concierge model.
Our team includes:
- Certified Industrial Hygienists (CIH)
- Certified Safety Professionals (CSP)
We support every phase of a project, including:
- Sampling coordination and logistics
- Laboratory analysis and QA/QC review
- Regulatory interpretation and reporting
- Development of corrective action and site‑specific safety plans
Clients benefit from single‑point project coordination, faster turnaround times, and consistent regulatory alignment.
Organic Vapor Analysis
Air samples for Organic Vapors are prepared using OSHA and NIOSH methods and analyzed by Gas Chromatography (GC) or Ultra‑High Performance Liquid Chromatography (UHPLC).
Routine organic vapor analysis includes:
- Solvents such as Benzene, Ethylbenzene, Toluene, and Xylene
- Ketones
- Amines
- Aldehydes
- Polycyclic Aromatic Hydrocarbons (PAHs)
- Alcohols
- Paraffin Wax Fume
- Total Hydrocarbons
Many organic vapor samples require specialized handling, including refrigerated or frozen storage. Our laboratory also supports custom and project‑specific analyses.
Clark Testing is AIHA LAP accredited for methods including NIOSH 1400, 1500, 1501, 1550, 5506, and OSHA 58.
Metals/Elemental Analysis
Metal fumes and metal dust are commonly evaluated during personal exposure assessments. Chronic exposure may result in serious health effects, including neurological and organ damage.
Samples are prepared using OSHA and NIOSH approved digestion methods (hot plate or microwave) and analyzed by:
- Inductively Coupled Plasma Spectroscopy (ICP)
- Graphite Furnace Atomic Absorption (GFAA)
Routine testing includes:
- Individual metals such as Arsenic, Beryllium, Cadmium, Chromium, Lead, and Nickel
- Welding Fume Metals Profile (13‑metal panel)
- Elemental Scan covering more than 20 metals
Bulk material elemental analysis is also available.
Clark Testing is AIHA LAP accredited for NIOSH 7102, 7302, and 7304.
Gravimetric / Extractions Analysis
Gravimetric analysis provides total or respirable particulate concentrations by measuring mass collected on filter media relative to sampled air volume.
Because gravimetric analysis is non‑destructive, samples may be used for additional testing such as:
- Crystalline Silica
- Metals
- Hexavalent Chromium
- Coal Tar Pitch Volatiles (CTPV)
Common determinations include:
- Total and Respirable Dust
- Welding Fume Particulate
- Oil Mist
- Benzene Soluble Fraction / Coal Tar Pitch Volatiles
- Coke Oven Emissions
Clark Testing is AIHA LAP accredited for NIOSH 0500, 0600, and 5042.
Anion Analysis
Using OSHA and NIOSH approved methods, Clark Testing performs anion and acid gas analysis by Ion Chromatography to determine airborne concentrations.
Common analytes include:
- Acid fumes such as Hydrochloric Acid, Nitric Acid, and Sulfuric Acid
- Sulfur Dioxide
- Ozone
- Fluorides (Particulate and Gaseous)
- Nitric Oxide and Nitrogen Dioxide
We also provide Hexavalent Chromium analysis following OSHA ID‑215 v2, with preparation methods tailored to the specific operation being evaluated (painting, plating, welding, or other processes). Due to sample instability, special handling requirements apply.
