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esm223_05__Lecture_Notes_smallsize-pt3-rev

esm223_05__Lecture_Notes_smallsize-pt3-rev - Site...

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Site Assessment and Characterization 42 Site Assessment and Characterization Design 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… 43 Site 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, sediments 44
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