The information that results from the characterization affects and shapes the planning and implementation of the remediation phase. The data will be evaluated and reviewed, and used to assist in formulating the objectives, strategy, and approach for the characterization phase. The sampling information, specifics of the incident, and the data collected during the initial assessment might take on many forms and might come from several different groups involved in the initial response and assessment activities. Characterization systematically expands on the initial assessment findings to identify other contaminated locations and determine the contamination footprint at the affected locations, in order to better define the boundaries. Also documents all analyses that were performed on the samples.Īssessment of the extent, location, and magnitude of contamination. Provides a chronological record of who has possessed the sample(s) from the moment of collection through receipt in the laboratory, to the eventual destruction or disposal. Expressing a positive analytical measurement falling below the LOQ as less than the established quantification limit or expressing a non-detect result as less than the detection limit. The levels of calibration standards should bracket the range of levels for which actual measurements are to be made.ĭata that includes both detected and non-detected results.
The comparison of a measurement standard or instrument with another standard or instrument to report or eliminate, by adjustment, any variation (deviation) in accuracy of the item being compared. The systematic or persistent distortion of a measurement process which deprives the result of representativeness (i.e., the expected sample measurement is different than the sample's true value.) A data quality indicator.ĭata that can only have two possible values. Airborne transmission allows organisms to enter the upper and lower respiratory tracts. These organisms must be capable of surviving for long periods of time outside the body and must be resistant to drying. Situations where droplet nuclei (residue from evaporated droplets) or dust particles containing microorganisms can remain suspended in air for long periods of time. Accuracy includes random error (precision) and systematic error (bias or recovery) that are caused by sampling and analysis. The degree of agreement between an observed value and an accepted reference value.
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