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Glossary - D

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"Definitive test" means, for Acute Toxicity Testing, a short-term toxicity test used to measure the acute toxicity of effluents or materials.

"Department" means the New Jersey Department of Environmental Protection.

"Department validated methods" means analytical methods developed and validated for analysis of specified matrices by the Department or by Department sponsored research.

"Detection limit" (DL) or "instrument detection limit" (IDL) means the lowest concentration above background noise level that an instrument can detect reliably.

"Dilution factor" (DF) means, for Chemical Testing, a multiplication factor applied to a calculated sample result to compensate for sample dilution. The dilution factor is determined as follows:

DF = Diluted sample volume/Original sample volume

"Dilution water" means, for Acute Toxicity Testing, unpolluted water of desired quality to be used in preparing the different test concentrations of the effluent and controls. For example, dilution water is usually collected from a point that is as close as possible to, but upstream or outside of, the effluent's zone of impact.

"Discharge" means an intentional or unintentional action or omission resulting in the releasing, spilling, leaking, pumping, pouring, emitting, emptying, or dumping of a pollutant into the waters of the State, onto land or into wells from which the pollutant might flow or drain into such waters, or into waters, or onto lands outside the judisdiction of the State which pollutant enters the waters of the State, and shall include the release of any pollutant into a municipal treatment works.

"Drinking Water Program" means the Department's program implementing the Safe Drinking Water Act, N.J.S.A. 58:12A-1 et seq.

"Drinking Water Sample" means a regulatory sample analyzed to determine compliance with the Drinking Water Program.

"DSAM" means Department Sanctioned Analytical Method. DSAMs are methods that laboratories may be certified to perform if they qualify under the requirements of this chapter. Mandatory methods, published or referenced in the Code of Federal Regulations, become DSAMs on their stated effective date. New or revised CERCLA CLP methods become DSAMs when new or revised CLP methods are included in Invitation for Bid documents published in the Commerce Business Daily. DSMs that are needed for analysis of Department program regulatory samples, are designated as DSAMs by procedures described at N.J.A.C. 7:18?2.21.

"DSM" means Department Selected Method. DSMs are methods selected for designation as DSAMs. DSMs include methods that the Department has determined are necessary for the analysis of Program regulatory samples, but are not mandatory methods published or referenced in the Code of Federal Regulations and are not new CERCLA CLP methods published in Invitation for Bid documents published in the Commerce Business Daily. DSMs may include:

  1. Published USEPA discretionary methods;
  2. Methods published by professional organizations with recognized expertise in method development such as ASTM, APHA, and USGS; and
  3. Departmental validated methods.

 

 

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Last Updated: October 10, 2013