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.
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
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;
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.
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: