Environmental Acronyms

The environmental industry is filled with acronyms relevant to a broad range of environmental topics. These areas can impact clients across sectors and industries, which is why we’ve broken them down in alphabetical order for quick reference.


Here’s our acronym cheat sheet:

  • ACGIH: American Conference of Governmental Industrial Hygienists

  • ACM Asbestos: Containing Material

  • AHERA: Asbestos Hazard Emergency Response Act of 1986

  • AHU: Air Handling Unit

  • AIHA: American Industrial Hygiene Association Analyst

  • AMS: Air Monitoring Services

  • API: American Petroleum Institute

  • APR: Air purifying respirator

  • ASHRAE: American Society of Heating, Refrigerating, and Air-Conditioning Engineers

  • AST: Aboveground Storage Tank

  • ASTM: American Society for Testing and Materials

  • BOD: Biological Oxygen Demand

  • BRI: Building-Related Illness

  • BSM: Bulk Services Group

  • BTEX: Benzene, Toluene, Ethylbenzene and Xylenes

  • C: Ceiling

  • CFM: Cubic feet per minute

  • CFR: Code of Federal Regulations

  • CO: Carbon monoxide

  • CO2: Carbon Dioxide

  • COD: Chemical Oxygen Demand

  • CPAHs: Carcinogenic Polynuclear Aromatic Hydrocarbons

  • DO: Dissolved Oxygen

  • DPE: Dual Phase Extraction

  • ELISA: Enzyme-Linked Immunosorbent Assay

  • ELTF: Excess Liability Trust Fund

  • EPA: Environmental Protection Agency

  • ETS: Environmental tobacco smoke

  • FID: Flame-Ionization Detector

  • FID: Facility Identification Number

  • HEPA: High Efficiency Particulate Air Filter

  • HSE/NPL: Health and Safety Executive/National Physical Testing Laboratory in Teddington, UK

  • HVAC: Heating, ventilation, and air-conditioning system

  • IAQ: Indoor Air Quality

  • IDCL: Industrial Default Closure Level

  • IDEM: Indiana Department of Environmental Management

  • INDOT: Indiana Department of Transportation

  • IOSHA: Indiana Occupational Safety & Health Administration

  • DLH: Immediately dangerous to life and health

  • IH: Industrial Hygiene

  • IPM: Integrated pest management

  • ISO: International Organization for Standardization

  • LDAR: Leak Detection and Repair

  • LUST: Leaking Underground Storage Tank

  • MCE: Mixed Cellulose Ester Membrane

  • MCS: Multiple Chemical Sensitivity

  • MNA: Monitored Natural Attenuation

  • MQR: Monthly Quality Report

  • MSDS: Material Safety Data Sheet

  • MSHA: Mine Safety and Health Administration

  • MTBE: Methyl Tertiary-Butyl Ether

  • MVOC: Microbial Volatile Organic Compound

  • NIOSH: National Institute of Occupational Safety & Health

  • NOAA: National Oceanic and Atmospheric Administration

  • NRCS: Natural Resources Conservation Service

  • NTIS: National Technical Information Service

  • OA: Outdoor air

  • ORP: Oxidation Reduction Potential

  • OSHA: Occupational Safety & Health Administration

  • OSM: Office of Surface Mining Reclamation and Enforcement

  • PAHs: Polynuclear Aromatic Hydrocarbons

  • PAPR: Powered air purifying respirator

  • PAT: Proficiency Analytical Testing

  • PCM: Phase Contrast Microscopy

  • PEL: Permissible Exposure Level

  • PID: Photo-ionization Detector

  • PLM: Polarized Light Microscopy

  • PM: Preventive Maintenance

  • PPB: Parts per billion

  • PPE: Personal Protective Equipment

  • PPM: Parts per million

  • QA/QC: Quality Assurance/Quality Control

  • QCC: Quality Control Coordinator

  • RDCL: Residential Default Closure Level

  • RELs: Recommended Exposure Limits

  • RISC: Risk Integrated System of Closure

  • SAL: Stop Action Limit

  • SBS: Sick Building Syndrome

  • SC: Specific Conductivity

  • SEM: Scanning Electron Microscopy

  • STEL: Short term exposure limit

  • SVE: Soil Vapor Extraction

  • SVOCs: Semi-Volatile Organic Compounds

  • TEM: Transmission Electron Microscopy

  • TLVs: Threshold Limit Values

  • TPH-DRO: Total Petroleum Hydrocarbons as Diesel-Range Organics

  • TPH-ERO: Total Petroleum Hydrocarbons as Extended-Range Organics

  • TPH-GRO: Total Petroleum Hydrocarbons as Gasoline-Range Organics

  • TVOCs: Total volatile organic compounds

  • TWA: Time-Weighted Average

  • UST: Underground Storage Tank

  • VAV: Variable air volume system

  • VOCs: Volatile Organic Compounds

  • VRP: Voluntary Remediation Program

  • WHO: Word Health Organization

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