March 2026 / Published in Environmental Consulting

Environmental Consulting Glossary of Terms

Environmental terms glossary: environmental consultant in an outdoor setting

This glossary of environmental terms covers the acronyms and definitions our junior staff and clients run into most in environmental consulting. These environmental terms show up in Phase I ESA reports, regulatory letters and lab results. For the services behind these environmental terms, see our Phase I ESA, Phase II ESA, underground storage tank and CCDD pages, or read what an environmental REC is.

Table of Contents

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  • Environmental Terms A to Z
  • A
      • AAI (All Appropriate Inquiries):
      • ACM (Asbestos Containing Material):
      • AST (Aboveground Storage Tank):
      • ASTM (American Society for Testing Materials):
      • AUL (Activity Use Limitation):
  • B
      • BEA (Baseline Environmental Assessment):
      • BTEX (Benzene, Toluene, Ethylbenzene, Xylenes):
      • Brownfield:
  • C
      • CCDD (Clean Construction Demolition Debris):
      • CERCLIS (Comprehensive Environmental Response, Compensation, and Liability Information System):
      • CESQG (Conditionally Exempt Small Quantity Generator):
      • CHMM (Certified Hazardous Materials Manager):
      • CDEPH (Chicago Department of Environment and Public Health):
      • CREC (Controlled Recognized Environmental Condition):
  • D
      • DRO (Diesel Range Organics):
  • E
      • EP (Environmental Professional):
      • ERNS (Emergency Response Notification System):
  • F
      • FINDS/FRS (Facility Index/Facility Registry System):
  • G
      • GPR (Ground Penetrating Radar):
      • GRO (Gasoline Range Organics):
  • H
      • HAZWOPER (Hazardous Waste Operations and Emergency Response):
      • HREC (Historical Recognized Environmental Condition):
  • L
      • LAST (Leaking Aboveground Storage Tank):
      • LUST (Leaking Underground Storage Tank):
      • LBP (Lead-Based Paint):
  • M
      • MOU (Memorandum of Understanding):
  • N
      • NFA (No Further Action):
      • NFR (No Further Remediation):
      • NPL (National Priorities List):
  • P
      • PAH (Poly Nuclear Aromatic Hydrocarbon):
      • PCB (Polychlorinated Biphenyls):
      • PESA (Preliminary Environmental Site Assessment):
      • PID (Photo-Ionization Detector):
      • PNA (Poly Nuclear Aromatic):
  • R
      • REC (Recognized Environmental Condition) :
      • RCRA (Resource Conservation and Recovery Act):
      • RSRA (Records Search and Risk Assessment):
  • S
      • SEMS (Superfund Enterprise Management System):
      • SICS (Standard Industrial Classification System):
      • SRO (Soil Remediation Objectives):
      • SVOC (Semi-Volatile Organic Compound):
  • T
      • TACO (Tiered Approach to Corrective Action Objectives):
      • TPH (Total Petroleum Hydrocarbons):
      • TSD (Transport/Store/Disposal):
  • V
      • VCP (Voluntary Cleanup Program):
      • VEC (Vapor Encroachment Condition):
      • VI (Vapor Intrusion):
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Environmental Terms A to Z

A

AAI (All Appropriate Inquiries):

The process of evaluating a property’s environmental conditions and assessing potential contamination to satisfy legal protections under CERCLA.

ACM (Asbestos Containing Material):

Materials containing more than 1% asbestos, which can pose health risks if disturbed.

AST (Aboveground Storage Tank):

A tank used to store liquids above the ground.

ASTM (American Society for Testing Materials):

An international standards organization that develops and publishes voluntary technical standards, including those for environmental assessments.

AUL (Activity Use Limitation):

Legal or physical restrictions placed on a property to ensure safe use, often related to contamination concerns.

B

BEA (Baseline Environmental Assessment):

An evaluation to document existing contamination on a property to limit liability.

BTEX (Benzene, Toluene, Ethylbenzene, Xylenes):

Common petroleum hydrocarbon compounds found in fuels and often considered indicators of contamination.

Brownfield:

Previously developed land that may be contaminated and requires environmental remediation before reuse.

C

CCDD (Clean Construction Demolition Debris):

Non-hazardous materials from construction or demolition projects suitable for landfill use.

CERCLIS (Comprehensive Environmental Response, Compensation, and Liability Information System):

A database of sites potentially requiring cleanup under the Superfund program.

CESQG (Conditionally Exempt Small Quantity Generator):

A generator of hazardous waste producing small amounts exempt from certain regulations.

CHMM (Certified Hazardous Materials Manager):

A professional certified to handle hazardous materials management.

CDEPH (Chicago Department of Environment and Public Health):

Agency overseeing environmental health in Chicago.

CREC (Controlled Recognized Environmental Condition):

A recognized environmental condition with controls in place to manage risks.

D

DRO (Diesel Range Organics):

A category of hydrocarbons found in diesel fuels.

E

EP (Environmental Professional):

A qualified individual conducting environmental assessments, as defined by ASTM.

ERNS (Emergency Response Notification System):

A federal database of hazardous substance releases.

F

FINDS/FRS (Facility Index/Facility Registry System):

A federal system consolidating data on facilities subject to environmental regulations.

G

GPR (Ground Penetrating Radar):

Technology used to detect subsurface objects, including tanks or buried contaminants.

GRO (Gasoline Range Organics):

A category of hydrocarbons typically found in gasoline.

H

HAZWOPER (Hazardous Waste Operations and Emergency Response):

OSHA regulations for safe handling and cleanup of hazardous materials.

HREC (Historical Recognized Environmental Condition):

Past environmental conditions that have been remediated or addressed to regulatory standards.

L

LAST (Leaking Aboveground Storage Tank):

A compromised aboveground tank causing potential environmental contamination.

LUST (Leaking Underground Storage Tank):

A compromised underground tank causing potential environmental contamination.

LBP (Lead-Based Paint):

Paint containing significant levels of lead, often requiring specialized handling for removal or remediation.

M

MOU (Memorandum of Understanding):

An agreement between parties outlining roles or responsibilities, often related to environmental projects.

N

NFA (No Further Action):

A determination that no additional remediation or investigation is required for a site.

NFR (No Further Remediation):

Certification indicating a site meets cleanup objectives, often issued under a Site Remediation Program.

NPL (National Priorities List):

The EPA’s list of hazardous waste sites eligible for long-term remedial action under the Superfund program.

P

PAH (Poly Nuclear Aromatic Hydrocarbon):

A group of organic compounds often found in petroleum and coal products.

PCB (Polychlorinated Biphenyls):

Toxic industrial chemicals used historically in electrical equipment and other applications.

PESA (Preliminary Environmental Site Assessment):

An initial evaluation to identify potential contamination risks.

PID (Photo-Ionization Detector):

A tool used to detect volatile organic compounds (VOCs) in air or soil.

PNA (Poly Nuclear Aromatic):

Compounds similar to PAHs, often associated with fossil fuels and combustion byproducts.

R

REC (Recognized Environmental Condition) :

The presence or likely presence of hazardous substances or petroleum products on a property.

RCRA (Resource Conservation and Recovery Act):

Federal law governing the management of hazardous and non-hazardous solid waste.

RSRA (Records Search and Risk Assessment):

A streamlined assessment process focused on document review and risk evaluation.

S

SEMS (Superfund Enterprise Management System):

EPA’s system for tracking hazardous waste cleanup activities.

SICS (Standard Industrial Classification System):

A system for classifying industries by activity type.

SRO (Soil Remediation Objectives):

Standards for acceptable contaminant levels in soil after cleanup efforts.

SVOC (Semi-Volatile Organic Compound):

Organic compounds with moderate volatility, often requiring environmental monitoring.

T

TACO (Tiered Approach to Corrective Action Objectives):

A framework for evaluating and addressing contamination based on risk and site-specific conditions.

TPH (Total Petroleum Hydrocarbons):

A measure of petroleum-based hydrocarbons in environmental media.

TSD (Transport/Store/Disposal):

Activities related to managing hazardous waste materials.

V

VCP (Voluntary Cleanup Program):

A state-managed program encouraging voluntary cleanup of contaminated properties.

VEC (Vapor Encroachment Condition):

The migration of hazardous vapors from subsurface contamination into a structure.

VI (Vapor Intrusion):

The process by which volatile chemicals migrate from contaminated groundwater or soil into the indoor air of buildings.

Have a question about environmental terms that aren’t on this list? Call A3E at (888) 405-1742 or email [email protected].

What you can read next

CADD for CCDD
CADD – Clean Construction Demolition Debris (CCDD) Figures
CADD Asbestos Abatement Plans
CADD – Asbestos Abatement Plans
Chaffee Housing Trust HUD Phase I ESA : 24 CFR Part 58
HUD Phase I ESA / 24 CFR Part 58 Project Profile
A3 Environmental Consultants logo
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Environmental Due Diligence

ES – Environmental Screens
RSRA – Record Search Risk Assessment
TSA
– Transaction Screen
Phase 1 ESA
Phase 2 ESA
PESA –
Preliminary ESA
PSI
– Preliminary Site Investigation
Soil Gas –
Investigation
BEA – Baseline Environmental

Nationwide Resource Map

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Email:  [email protected]

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