24-hour Composite Sample definition

24-hour Composite Sample means an aggregate sample derived from no fewer than eight discrete samples collected at equal time intervals or collected proportional to the flow rate over the compositing period. The aggregate sample shall reflect the average source water quality covering the composite 24-hour sample period.
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24-hour Composite Sample means a sample collected over a time period of 24 consecutive hours. The sample shall be made up of at least 24 discrete samples taken approximately one hour apart with the volume of each discrete sample being proportional to the sewage flow at the time the discrete sample is taken; and
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24-hour Composite Sample means a time-composite sample and constitutes of an integrated sample made up of blending 24 hourly aliquots taken by refrigerated autosampler, which are obtained at an hourly frequency having same sample volume;
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More Definitions of 24-hour Composite Sample

24-hour Composite Sample means a combination of individual aliquots obtained at a minimum frequency of one aliquot at hourly intervals over a 24-hour period.
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24-hour Composite Sample means a sample consisting of at least 3 individual flow-proportioned samples of wastewater, taken by the grab sample method or by an automatic sampler, which are taken at approximately equally spaced time intervals for the duration of the discharge within a 24-hour period and which are combined prior to analysis. A flow-proportioned composite sample may be obtained by:
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Related to 24-hour Composite Sample

  • Composite sample means a combination of individual samples of wastewater taken at 1 hour intervals, for eight (8) hours (or for the duration of discharge, whichever is less), to minimize the effect of variability of the individual samples. Individual samples must be of equal volume. (Example: one (1) liter per hour.)

  • Sampler means a person who is employed by or is an owner of a licensed laboratory, grower, or processor and is authorized by that employer to collect samples in accordance with the testing laboratory's standard operating procedures and these Rules.

  • Reference biological product means the single biological product licensed pursuant to 42 U.S.C.

  • DNA sample means any material that has come from a human body and consists of or includes human cells;

  • Drug sample means a unit of a prescription drug that is not intended to be sold and is intended to promote the sale of the drug.