Sampling objectives;
Pre sampling activities;
Sample collection;
In situ or field analyses;
Sample preservation and handling;
Chain of custody control and records management;
Analytical procedures and quantitation limits for both laboratory and field
Field and laboratory quality assurance/quality control;
Evaluation of data quality; and
Health and safety.
The QAPjP also should include procedures for conducting the site characterization,
installing and developing ground water monitoring wells, and implementing other monitoring
programs (e.g., vadose zone monitoring and monitoring of springs in karst terranes).
Pre Sampling Activities
The following activities should be performed prior to collecting ground water samples
for analysis:
Determining sampling frequency;
Measurement of static water level elevation;
Detection and sampling of immiscible layers; and
Well purging.
These activities are discussed in greater detail in the following sections.
November 1992
7 2






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