Site Assessment and Characterization42Site Assessment and CharacterizationDesign of a Sampling Plan–Any sampling plan is limited by available funds–Resist pressure to collect the least number of samples: •Cheaper to obtain the samples/information correctly and sufficiently the first time•More expensive to go into risk assessment & remediation design with bad/incomplete information– May require a second sampling program– New data may actually show a very different situation…43Site Assessment and Characterization•Type of pollutants potentially present will guide the design of the sampling program:–Immobile pollutants (e.g. PCBs and most metals in silty or clayey materials) will be found in soils near the source–Mobile compounds (e.g. organic solvents in sands) may have migrated significantly and require more extensive groundwater sampling–Bioaccumulation? Sample biota, sediments44
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