Glossary - L

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"Laboratory" means any individual or other entity, including without limitation, corporations, associations, partnerships, joint ventures, and the United States, any state, any foreign country or government, and any political subdivision or agency thereof, that performs analyses of samples.

"Laboratory grade water" means a supply of water meeting or exceeding the specifications given in N.J.A.C. 7:18?7.4(b), to be used for the holding, spawning, and rearing of aquatic organisms used in toxicity testing.

"Laboratory pure water" means distilled, deionized, or charcoal treated water that meets the requirements of:

1. N.J.A.C. 7:18?4.5(e), for microbiological testing;
2. N.J.A.C. 7:18?6.2, for radiochemical testing; or
3. N.J.A.C. 7:18?7.4, for acute toxicity testing.

"Larvae" means, for Acute Toxicity Testing, the fishes that are less than or equal to 20 days post hatch.

"Lethal concentration (LC)" means, for Acute Toxicity Testing, the statistical estimate of the toxicant concentration producing death of the test organisms. LC is usually defined as the median (50 percent) lethal concentration, LC50, i.e. concentration killing 50 percent of tested organisms at a specific time of exposure, for example 96-hour LC50.

"LC50" means, for Acute Toxicity Testing, the lethal concentration at which 50 percent of tested organisms are killed over a specific time of exposure.

"LC Method" means Lucas Cell Method, USEPA/600/2-87/082, March 1989, a DSAM for the analysis of radon in drinking water samples.

"LS Method" means Liquid Scintillation Method, USEPA/600/ 287/082, March 1989, a DSAM for the analysis of radon in drinking water samples.