Abbreviations and Acronyms in Environmental & Occupational Health



AA Administering Agency
AB Assembly Bill (California)
AB 1807 Tanner Process for Identifying and Controlling Air Toxics, H&S Code Section 39650 et seq., Agricultural Code Section 14021 et seq.
AB 2185Hazardous Materials Release Response Plans and Inventory, 2189 H&S Code Section 25500 et seq.
AB 2588Air Toxics "Hot Spots" Information and Assessment Act (California), H&S Code Section 44300 et seq.
AB 2595 California Clean Air Act, H&S Code Section 39000 et seq.
AB 3777 Risk Management and Prevention Plans for Acutely Hazardous Materials, including AHM list, H&S Code Section 25531 et seq.
ABET Accreditation Board for Engineering and Technology, Inc.
ABIH American Board of Industrial Hygiene
AC Acceptable Concentration
ACBM Asbestos Containing Building Material
ACGIH American Conference of Governmental Industrial Hygienists
ACM Asbestos Containing Material
ADD Average Daily Dose
ADI Acceptable Daily Intake
ADR Alternative Dispute Resolution
AG Attorney General
AGST Above Ground Storage Tank
AHERA Asbestos Hazard Emergency Response Act, 1986 (See Title 2 of TSCA)
AHM Acutely Hazardous Materials
AIHA American Industrial Hygiene Association
ALARA As Low As Reasonably Achievable
ALJ Administrative Law Judge
AMS Agriculture Marketing Service
ANPR Advanced Notice of Proposed Ruling
ANSI American National Standards Institute
AO Administrative Order
APA Administrative Procedure Act, 5 USC Section 551 et seq.; Government Code Section 11340 et seq.
APC Aerobic Plate Count
APCA Air Pollution Control Act (1955)
APCD Air Pollution Control District (California)
APCO Air Pollution Control Officer, Health and Safety (H&S) Code Section 40750 et seq. (California)
APF Assigned Protection Factor
API American Petroleum Institute
AQCR Air Quality Control Region
AQMD Air Quality Management District, South Coast (California)
ARAR Applicable or Relevant and Appropriate Requirements (CERCLA)
ARB Air Resources Board (Cal/EPA)
ARBO Arthropod-borne
ASHRAE American Society of Heating, Refrigeration and Ventilation Engineers
ASPIS Abandoned Site Program Information System
ASSE American Society of Safety Engineers. Los Angeles Chapter
AST Above-ground Storage Tanks
ATCM Air Toxics Control Measure
ATSDR Agency for Toxic Substances and Disease Registry (SARA)
ATTIC Alternative Treatment Technology Information Center


BACT Best Available Control Technology
BAL British Anti Lewisite
BAT Best Available Technology
BATEA Best Available Technology Economically Achievable
BCME bis-Chloromethyl ether
BCT Best Conventional Pollutant Control Technology
BDAT Best Demonstrated Available Technology
BEI Biological Exposure Index
BEIR Biological Effects of Ionizing Radiation
BHC Benzene hexachloride
BMP Best Management Practice
BNA Bureau of National Affairs, Inc.
BOD Biochemical or Biological Oxygen Demand
BOP Basic Oxygen Process
BPT Best Practicable Control Technology Currently Available (CCAA)
Breeder Liquid Metal Fast Breeder Reactor
BRFSS Behavioral Risk Factor Surveillance System
BTI Bacillus thuringiensis israelis


CAA Clean Air Act (1963), 42 USC Section 7401 et seq., H&S Code Section 39000 et seq.
CAAA Clean Air Act Amendments (1965)
Cal/EPA California Environmental Protection Agency
Cal-OSHA California Division of Occupational Safety and Health
CalFDA Food and Drug Administration (California)
CalTrans California Department of Transportation
CAMU Corrective Action Management Units (RCRA)
CAO Corrective Action Order (RCRA)
CAP Capacity Assurance Plan (RCRA)
CAP/MAP Controlled Atmosphere Packaging/Modified Atmosphere Packaging
CARB California Air Resources Board (Cal/EPA)
CAS Chemical Abstracts Service
CBI Confidential Business Information
CCAA California Clean Air Act, H&S Code Section 39000 et seq.
CCR California Code of Regulations
CCW Chemical Constituent in Waste
CCWE Chemical Constituent in Waste Extract
CDC Centers for Disease Control and Prevention
CDC Wonder Single-point access to CDC reports, guidelines, and public health data
CDFA California Department of Food and Agriculture
CDHS California Department of Health Services
CE-SQG Conditionally Exempt Small Quantity Generators
CEG Certified Engineering Geologist
CEHA California Environmental Health Association
CEM Continuous Emission Monitoring
CEQA California Environmental Quality Act, Public Resources Code Section 21000 et seq.; Title 14 CCR Section 15000 et seq.
CERCLA Comprehensive Environmental Response, Compensation and Liability Act of 1980 (Federal Superfund), 42 USC Section 9601 et seq., 40 CFR; California Superfund H&S Code, Section 25300 et seq., see HSA
CERCLIS Comprehensive Environmental Response, Compensation, and Liability Information System (see CERCLA and NCP)
CERI Center for Environmental Research Information (regarding alternative treatment technologies)
CF Concentration Factor
CFCs Chlorofluorcarbons
CFR Code of Federal Regulations
CGL Comprehensive General Liability Insurance
CHEMTREC CHEMical TRansportation Emergency Center (CMA)
CHEST Chick Embryo Toxicity Screening Test
CHP Certified Health Professional
CIH Certified Industrial Hygienist
CMA Chemical Manufacturers Association
COD Chemical Oxygen Demand
CRWQCB California Regional Water Quality Control Boards
CSO Combined Sewer Overflow
CSP Certified Safety Professional
CSWMP County Solid Waste Management Plan (California)
CURFFL California Uniform Retail Food Facilities Law
CWA Clean Water Act or FWPCA, 33 USC Section 1251 et seq.; CA Water Code Section 13200 et seq. (Porter-Cologne Act)


D-Wastes Hazardous waste exhibiting ignitibility, reactivity, corrosivity, or toxicity (RCRA)
DB Dry Bulb
DBCP Dibromochloropropane
DCO Document Control Officer
DDT Dichloro-diphenyl-trichloroethane
DES Diethylistilbesterol
DFA Department of Food and Agriculture (California)
DHS Department of Health Services (a.k.a. DOHS, California)
DO Dissolved Oxygen
DOAS Differential Optical Absorption Spectroscopy
DOD Department of Defense (Federal)
DOE Department of Energy (Federal)
DOHS Department of Health Services (a.k.a. DHS, California)
DOI Department of the Interior (Federal)
DOJ Department of Justice (Federal)
DOP Dioctyl Phthalate
DOT Department of Transportation (Federal)
DPR Department of Pesticide Regulation (Cal/EPA)
DRE Destruction/Removal Efficiency
DRT Decimal Reduction Time
DSA Division of the State Architect (California)
DTSC Department of Toxic Substances Control (Cal/EPA)


EC Emulsifiable Concentrate
EC Excess Cases
ED Effective Dose
EER Excess Emission Reports
EF Emission Factor
EGR Exhaust Gas Redistribution
EHS Extremely Hazardous Substances
EIL Environmental Impairment Liability Insurance
EIR Environmental Impact Report (CEQA)
EIS Environmental Impact Statement (NEPA)
ELF Extremely Low Frequency
EMB Eosin Methylene Blue broth (used in the completed test for coliform, water quality)
EMF Electromagnetic Frequency
EP Extraction Procedure
EP TOX Extraction Procedure Toxicity Test (RCRA)
EPA Environmental Protection Agency (Federal)
EPA # Generator # for RCRA manifesting (Federal)
EPCRA Emergency Planning and Community Right to Know Act (Title III of SARA)
EPCRTKA Emergency Planning and Community Right-to-Know Act of 1986, more commonly known as SARA Title III or EPCRA, 42 USC Section 11001 et seq., 40 CFR Part 372
EPF Effective Protection Factor
ERA Environmental Risk Assessment (for EIL)
ERC Emissions Reduction Credit
ERRIS Emergency and Remedial Response Inventory System
ESA Environmental Site Assessment
ESA Endangered Species Act, 15 USC Section 1531 et seq.
ESH Environmental Safety and Health
ESP Electrostatic Precipitator
ESU Electrostatic Units
ETS Emergency Temporary Standard
EV Expected Value
EXAMS Exposure Analysis Modeling System


F-List Hazardous waste from non-specific (generic) sources (EPA)
FAO Food & Agriculture Organization of the United Nations
FC Fecal Coliform
FCM2 Food Chain Model 2 (WASP)
FDA Food and Drug Administration (Federal)
FDCA Food, Drug and Cosmetics Act (Federal)
FEMA Federal Emergency Management Agency
FEPCA Federal Environmental Pesticides Control Act (1972)
FEV Forced Expiratory Volume
FF Fit Factor
FGIS Federal Grain Inspection Service
FID Flame Ionization Detector
FIFRA Federal Insecticide, Fungicide, and Rodenticide Act, 7 USC, Section 136 et seq.
FIP Final Implementation Plan
FOIA Freedom of Information Act (Federal)
FOM Field Operations Manual (OSHA)
FONSI Findings of No Significant Impact (NEPA)
Form R Annual Federal report for documenting hazardous materials handling (SARA)
FR Federal Register
FS Feasibility Study (CERCLA)
FS Fecal Streptococci
FSIS Food Safety and Inspection Service
FTIR Fourier Transform Infrared
FTU Fixed Treatment Unit
FVC Forced Vital Capacity
FWPCA Federal Water Pollution Control Act, (CWA) 33 USC Section 12251 et seq.


GACT Generally Available Control Technology
GAO General Accounting Office (Federal)
GC Gas Chromatography
GC/MS Gas Chromatography/Mass Spectometry
GENETOX Data Management and Statistical Software for Microbial Mutagenesis Assays (EPA)
GER Gas Exchange Region
GFR Glomerulus Filtration Rate
GLC Ground Level Concentration
GMP Good Manufacturing Processes
GRAS List Generally Recognized as Safe
GSC Gravity Settling Chamber
GT Globe Temperature
GW Ground Water
GWPS Ground Water Protection Standard


HACCP Hazard Analysis and Critical Control Point
HAPs Hazardous Air Pollutants
HAR Head Airways Region
HazDat Hazardous Substance Release/Health Effects Database (contains information on the release of hazardous substances, emergency events, ATSDR Priority List of Hazardous Substances including health effects by route and duration of exposure, etc.) (ATSDR)
HAZOP Hazard and Operability Study
HAZWOPER Hazardous Waste Operator Emergency Response (Federal)
HCA Hearing Conservation Amendment
HCFCs Hydrochlorofluorocarbons
HCS Hazard Communication Standard (OSHA)
HEG Homogenous Exposure Group
HEPA High Efficiency Particulate in Air filters
HH&E Human Health and the Environment
HHE Health Hazard Evaluations
HHW Household Hazardous Waste
HMBP Hazardous Materials Business Plans, H&S Code, Section 25504 et seq.
HMIS Hazardous Materials Information System (Federal)
HMTA Hazardous Materials Transportation Act, 49 USC, Section 1801 et seq.; 49 CFR
HMTC Hazardous Materials Technical Center (DOT)
HMTRI Hazardous Materials Training and Research Institute
HOC Halogenated Organic Compounds
HPC Heterotrophic Plate Count
HPD Hearing Protection Device
HPLC High Performance Liquid Chromatography
HR House Report (Federal bill originated in the House of Representatives)
HRS Hazard Ranking System (CERCLA)
HS Hazardous Substance
HSA Hazardous Substance Account of the California Superfund, H&S Code Section 25300 et seq.
HSAA Hazardous Substance Account Act, 1981 (California)
HSAs Host Specific Agents
HSC Health & Safety Code (California)
HSCAP Hazardous Substance Cleanup Arbitration Panel, H&S Code Section 25356.1 et seq.
HSPF Hydrologic Simulation Program Fortran
HSWA Hazardous and Solid Waste Amendments (to RCRA), 1984
HTGCR High Temperature Gas Cooled Reactor
HTST High Temperature Short Term (pasteurization)
HW Hazardous Waste
HWCL Hazardous Waste Control Law (California RCRA's counterpart H&S Code Section 25100 et seq.)
HWIS Hazardous Waste Information System (DTSC)
HWMU Hazardous Waste Management Units (RCRA)
HWTC Hazardous Waste Treatment Council


IAQ Indoor Air Quality
IARC International Agency for Research on Cancer
IDLH Immediately Dangerous to Life or Health
IE Initiating Event
IGRs Insect Growth Regulators
IMS Ion Mobility Spectrometry
IMViC Indole, Methylene blue, Voges Proskauer, Citrate (Coliform test for water quality)
INUR Inventory Update Rule
IPCC Intergovernmental Panel on Climate Control
IPM Integrated Pest Management
IRIS Integrated Risk Information Service
IRP Instantly Responsible Party
IS Interim Status (for a TSDF)
ISD Interim Status Document
IWMB California Integrated Waste Management Board (Cal/EPA)


JTU Jackson Turbidity Unit


K-List Hazardous waste from specific sources (by industry)


LAER Lowest Achievable Emission Rate
LASER Light Amplification by Stimulated Emission of Radiation
LC50 Lethal Concentration for 50% of those exposed
LD50 Lethal Dose for 50% of those exposed
LD50/30 Lethal dose for 50% of the population in 30 days
Ldn Noise level (day and night) over a 24-hour time period
LDR Land Disposal Restrictions (RCRA)
LEA Local Enforcement Agency
LEL Lower Explosive Limit
LEPC Local Emergency Planning Commission (EPCRA)
LFG Landfill Gas
LLRWPA Low Level Radioactive Waste Policy Act, 42 USC Section 2021(b)
LOAEL Lowest Observed Adverse Effect Level
LOIS Loss of Interim Status (for TSDF)
LUFT Leaking Underground Fuel Tank
LUST Leaking Underground Storage Tank


MACT Maximum Available Control Technology
MCL Maximum Concentration Limits or Maximum Contaminant Levels (SDWA)
MCLGs Maximum Contaminant Level Goals (SDWA)
MEI Maximum Exposed Individual
MEP Maximum Exposed Persons
MIGA "Make it go away"
MLI Most Likely Individual
MOU Memorandum of Understanding
MPI Maximum Plausible Individual
MPN Most Probable Number (coliform counts)
MPRSA Marine Protection, Research and Sanctuaries Act, 16 USC Section 1431 et seq.
MRF Municipal Recycling Facility
MRP Medical Removal Protection
MRSA Multiple Resistant Staphylococcus aureus
MRT Mean Radiant Temperature
MS Mass Spectrometry
MSDS Material Safety Data Sheets, 29 CFR Section 1910.1200(c); Labor Code Section 6374
MSHA Mine Safety & Health Administration
MSS Moving Source Standards (air)
MTF Multi-Tube Fermentation
MTU Mobile Treatment Unit


NAA Non-Attainment Areas (CAA and California CAA)
NAA Neutron Activation Analysis
NAAQS National Ambient Air Quality Standards (CAA)
NAPAP National Acid Precipitation Assessment Program
NBAR Nonbinding Allocation of Responsibility
NCHS National Center for Health Statistics (CDC)
NCP National Contingency Plan (CERCLA)
NCRIC National Chemical Response and Information Center
NEHA National Environmental Health Association
NEIC National Enforcement Investigations Center (US EPA)
NEPA National Environmental Policy Act, 42 USC Section 4321
NESHAPs National Emission Standards for Hazardous Air Pollutants (CAA)
NETSS National Electronic Telecommunications System for Surveillance (CDC)
NFPA National Fire Protection Association
NIH National Institutes of Health
NIHL Noise Indused Hearing Loss
NIMBY "Not In My Backyard" Syndrome
NIMEY "Not in my election year"
NIOSH National Institute for Occupational Safety & Health (CDC)
NIOSHTIC NIOSH's electronic bibliographic database of literature in the field of occupational safety and health (updated quarterly)
NMFS National Marine Fisheries Service
NOAEL No Observed Adverse Effect Level
NOC Notice of Commencement
NOEL No-Observed-Effect Level
NOV Notice of Violation
NOx Nitrogen oxides, H&S Code Section 43101.5, 43610-43612, 43654
NPDES National Pollutant Discharge Elimination System (CWA)
NPL National Priority List (CERCLA)
NRC Nuclear Regulatory Commission (Federal)
NRC National Response Center (Federal)
NRR Noise Reduction Rating
NSF National Sanitation Foundation
NSPS New Source Performance Standards (CWA and CAA)
NSR New Source Review (California CAA)
NTIS National Technical Information Service
NTP National Toxicology Program
NTU Nephelomic Turbidity Unit
NWPA Nuclear Waste Policy Act, 42 USC Section 10101 et seq.


O&M Operation and Maintenance
OAH Office of Administrative Hearings (California)
OAL Office of Administrative Law (California)
OECA Office of Enforcement and Compliance Assurance (US EPA)
OEHHA Office of Environmental Health Hazard Assessment (Cal/EPA)
OES Office of Emergency Services (California)
OMB Office of Management and Budget (Federal)
ONWI Office of Nuclear Waste Isolation (Federal)
OPs Organophosphates
ORM Other Regulated Material (DOT terminology)
ORT Oral Rehydration Therapy
OSHA Occupational Safety and Health Administration (Federal)
OSHAct Occupational Safety & Health Act
OSHRC Occupational Safety & Health Review Commission
OSWER Office of Solid Waste and Emergency Response (US EPA)
OTA Orthotolodine arsenite (chlorine test reagent)
OTA Office of Technology Assessment (US Congress)


P-Waste Acutely Hazardous Waste
PA/SI Preliminary Assessment/Site Investigation
PAHs Polynuclear [or Polycyclic] Aromatic Hydrocarbons
PAN Peroxy-acyl nitrate
PAPR Powered Air Purifying Respirator
PAR Primary Attack Rate
Part A The overview portion of a TSDF haz. waste permit application, under RCRA
Part B The detailed portion of a TSDF haz. waste permit application, under RCRA
PBR Permit by Rule
PC Phenol Coefficient
PCA Property Clearance Assessment
PCBs Polychlorinated biphenyls
PCDF Polychlorinated dibenzofurans
PCE Perchloroethylene
PCR Polymerase Chain Reaction
PCV Positive Crankcase Ventilation
PE Professional Engineer
PEA Preliminary Endangerment Assessment
PEL Permissible Exposure Limits (OSHA)
PF Protection Factor
PHLIS Public Health Laboratory Information System (CDC)
PID Photo Ionization Detector
PL Public Law (Federal)
PM10 Particulate Matter measuring < 10 microns in diameter
PMI Point of Maximum Impact
PMN Premanufacture Notice
PMR Proportionate Mortality Ratio
PNAs Polynuclear Aromatic Hydrocarbons
Porter-Cologne Water Code Section 13200 et seq. Water Act (California)
POTW Publicly-Owned Treatment Works
ppb Parts per billion
PPE Personal Protective Equipment
ppm Parts per million
Proposition 65 Safe Drinking Water and Toxic Enforcement Act, H&S Code Section 25249.5 et seq. (California)
PRP Potentially Responsible Party (Superfunds)
PSA Preliminary Site Assessment
PSD Prevention of Significant Deterioration (CAA)
PSI Pollution Standards Index (Air)
PSI Pounds per Square Inch (pressure)
PSIa Pounds per Square Inch, absolute (PSIa = 0 in a vacuum)
PSIg Pounds per Square Inch, gauge (PSIg = 0 at sea level)
PSIL Preferred Speech Interference Level
PSP Paralytic Shellfish Poisoning
PT Prescription Treatment
PTPLU Point Plume
PTS Permanent Threshold Shift


QA/QC Quality Assurance/Quality Control
QLFT Qualitative Fit Test
QNFT Quantitative Fit Test


R&D Research and Development
RAD Radiation Absorbed Dose
RAP Remedial Action Plan (Superfunds)
RCRA Resource Conservation and Recovery Act (Federal), 42 USC Section 6901, 40 CFR
RCS Rotating Centrifugal Sampler
RD/RA Remedial Design/Remedial Action
RDF Refuse Derived Fuel
REA Registered Environmental Assessor (California)
REHS Registered Environmental Health Specialist (California, formerly Registered Sanitarian)
REM Roentgen Equivalent, Man
REPFED Refrigerated Processed Food with Extended Durability
RF Radio Frequency
RFA RCRA Facilities Assessment
RFD Reference Dose
RG Registered Geologist
RI Radioisotope
RI/FS Remedial Investigation/Feasibility Study
RMPP Risk Management and Prevention Plan, H&S Code Section 25531
RO Reverse Osmosis
ROD Record of Decision (CERCLA)
ROI Rate of Intake
RP Responsible Party (CERCLA), 42 USC Section 9607(a)
RPP Respiratory Protection Program
RQ Reportable Quantity (under DOT, see CERCLA and SARA Title III)
RQG Reduced Quantity Generator (100-1000 kg/mo)
RR Relative Risk or Risk Ratio
RTD Repetitive Trauma Disorder
RTECS Registry of Toxic Effects of Chemical Substances; database of toxicological information compiled, maintained, and updated by NIOSH
RTK Right-to-Know
RVP Reid Vapor Pressure
RWQCB Regional Water Quality Control Board (California)


SAR Secondary Attack Rate
SARA Superfund Amendments and Reauthorization Act of 1986 (CERCLA)
SARA Title III Emergency Preparedness and Community Right-to-Know Section of SARA (a.k.a. EPCRTKA)
SAS Surface Air Sampler
SB Senate Bill (California)
SB 14 Hazardous Waste Source Reduction and Management Review Act, 1989, H&S Code Section 25244.12 et seq.; reporting regulations Title 22 CCR
SB 198 Requires Illness and Injury Prevention Plans (IIPP) (California)
SB 1500 Hazardous Waste Management Act (California)
SB 1726 Amended the definitions of hazardous waste under SB 14
SCAP Superfund Compensation Accomplishments Plan (SARA)
SCAQMD South Coast Air Quality Management District (California)
SCBA Self Contained Breathing Apparatus
SDWA Safe Drinking Water Act (Federal), 42 USC Section 300 et seq.
SEC Securities & Exchange Commission (Federal)
SERATRA SEdiment RAdionuclide TRAnsport
SERC State Emergency Response Commissions (Section 301 of EPCRA)
SF Safety Factor
SF Separation Factor
SHD Safe Human Dose
Sher Collectively, AB 1362, AB 3565, AB 3447, and AB 3781, effective 1984, regulation of USTs (California)
SIC Standard Industrial Classification
SIP State Implementation Plan (CAA)
SITE Superfund Innovative Technology Evaluation
SMR Standardized Mortality Ratio
SMSA Standard Metropolitan Statistical Areas
SNUR Significant New Use Rule (TSCA)
SOP Standard Operating Procedures
SOx Sulfur oxides, H&S Code Section 41514.5
SPC Standard Plate Count
SPCC Spill, Prevention, Containment and Countermeasures
SPL Sound Pressure Level
SQG Small Quantity Generator (less than 100 kg/mo)
SR Senate Report (Federal bill originated in Senate)
SRP Scientific Review Panel (California)
SRSA Slowly Reacting Substance of Anaphylaxis
SSE Stationary Source Enforcement
STC Sound Transmission Class
STEL Short Term Exposure Limit
STL Sound Transmission Level
STLC Soluble Threshold Limit Concentration
STP Standard Temperature and Pressure
SUD Safe Use Determination
Superfund Comprehensive Environmental Response, Compensation and Liability Act of 1980 (See CERCLA)
SWA Solid Waste Act (aka RCRA)
SWAT Solid Waste Assessment Test
SWIS Solid Waste Information System
SWMP Stormwater Monitoring Program
SWMU Solid Waste Management Unit
SWPPP Stormwater Pollution Prevention Program
SWRCB State Water Resources Control Board (Cal/EPA)
SWT Rule Surface Water Treatment Rule (SDWA)


TAC Toxic Air Contaminant, 42 USC Section 7412; H&S Code Section 39655; Food & Ag Code Section 14021
TBR Tracheobronchial Region
TC Total Coliform
TC Toxic Characteristic
TCDD Tetrachlorodibenzo-p-dioxin (a.k.a. "Dioxins")
TCE Trichloroethylene
TCLP Toxicity Characteristic Leaching Procedure (RCRA)
TD Toxic Dose
TDI Toluene diisocyanate
TEC Thermotolerant E. coli
TEQ Toxic Equivalent Quotient
THMs Trihalomethanes
TISE "Take It Somewhere Else" Syndrome
Title III (of SARA) Community Right-to-Know and Emergency Response Provisions (aka EPCRTKA)
TLV Threshold Limit Value (ACGIH)
TME Test Marketing Exemption
TNT Trinitrotoluene
TOC Total Organic Carbon
TOCP Triorthocresylphosphate
TOD Total Oxygen Demand
TON Threshold Odor Number
TOTP Triorthotolylphosphate
TOXNET Toxicology Data Network (a family of databases that includes TRI)
TPCA Toxic Pits Cleanup Act, H&S Code Section 25208 et seq.
TPQ Threshold Planning Quantity (SARA Title III)
TRI Toxic Release Inventory (part of TOXNET) (section 302 of EPCRA)
TSCA Toxic Substances Control Act (Federal), 15 USC Section 2601 et seq.
TSD Treater, Storer, Disposer H&S Code Section 25123.3
TSDF Treatment, Storage, Disposal Facility (hazardous waste)
TSS Total Suspended Solids
TTLC Total Threshold Limit Concentration
TTS Temporary Threshold Shift
TTU Transportable Treatment Unit
TWA Time Weighted Average


U-Waste Not Acutely Hazardous Waste, dilution prohibited (EPA)
UBC Uniform Building Code
UEL Upper Explosive Limit
UFC Uniform Fire Code
UGST Underground Storage Tank
UGT Underground Tank
UHT Ultra High Temperature (pasteurization)
UIC Underground Injection Control, H&S Code Section 25159.10, SDWA, RCRA
UM Uniform Manifest
UNAMAP Users Network of Applied Modeling in Air Pollution
US EPA United States Environmental Protection Agency
USC United States Code
USCA United States Code Annotated
USDW Underground Source of Drinking Water (SDWA)
UST Underground Storage Tank


VC&D Voluntary Condemnation and Destruction
VEO Visible Emissions Observation
VHAP Volatile Hazardous Air Pollutant
VOC Volatile Organic Compound, H&S Code Section 25123.6


WASP Water Quality Analysis Simulation Program
WBGT Wet Bulb Globe Temperature
WDR Waste Discharge Requirements
WHO World Health Organization
WIPP Waste Isolation Pilot Plan (relating to transUranic radioactive waste)
WP Wettable Powder
WPF Workplace Protection Factor
WQA Water Quality Act of 1987 (Federal, FWPCA)
WRCB Water Resources Control Board (Cal/EPA)
WWTP Wastewater Treatment Plant


Z List OSHA list of hazardous chemicals (29 CFR 1910 Subpart Z, Worker Right-To-Know) Glossary of Common Names of California Environmental Laws