liter; a unit of volume equaling 1000 ml
Lab Pack
Small containers (such as ampoules) of hazardous waste placed in overpack drums (lab packs) with non-biodegradable sorbent.
LAER
Lowest Achievable Emission Rate, (CAA). Applied to major new or modified sources in non-attainment areas. More strict than BACT or RACT.
Land
application
The application of sewage sludge to land to condition the soil or fertilize crops or other vegetation.
Land ban
Under RCRA prohibits the land disposal of certain wastes unless they meet applicable treatment standards, (40 CFR 268).
LBP
Lead-Based Paint; (TSCA 40 CFR 745)
LC-50
Lethal Concentration: The median lethal concentration at which 50% of test species died. Concentration lethal to 50% of tested recipients.
LCCA
Lead Contamination Control Act
LCLo
Lethal Concentration Low: The lowest concentration of a substance in air, other than LC50, which has been reported to have caused death in humans or animals.. The reported concentrations may be entered for periods of exposure which are less than 24 hours (acute) or greater than 24 hours (subacute and chronic).
LD50
Lethal Dose - Amount to cause death in 50% of exposed species
LDLO
Lethal Dose Low - Lowest dose to cause death in humans or animals
LDF
Land Disposal Facilities
LDP
Land Disposal Prohibitions
LDR
Land Disposal Restrictions (40 CFR Part 268)
LEL
Lower Explosive Limit. The minimum concentration of a combustible gas or vapor in air which will ignite if an ignition source is present, also called LFL.
LEPC
Local Emergency Planning Committee: Established under EPCRA as the local focal point for reporting chemical storage and emergency response planning activities (SARA Title III).
LERA
Lead Exposure Reduction Act
LFL
Lower Flammable Limit (see LEL)
LIMS
Laboratory Information Management Systems, specialized software for lab operations.
LNAPL
Light Non-Aqueous Phase Liquid
LOAEL
Lowest Observed Adverse Effect Level
LOEL
Lowest Observed Effect Level
LOD
Limit of Detection: The lowest concentration that can be determined to be statistically different from a blank. The analytical instrument output signal produced by the sample must be three to five times the instrument’s background noise level to be at the time of detection.
LPM
Liters Per Minute
LQG
Large Quantification: The minimum mass of the analyte above which the precision of the reported result is better than a specified level.
LUST
Leaking Underground Storage Tank