L1 /
2
CH3041
SAMPLING I
• The first step in
environmental chemical
sampling is to define the program objectives
sampling is to define the program objectives
1) Exploratory, 2) Monitoring
• Site selection (temporal &
spatial variability)
• List all analytes (eg. pesticide +
metabolites)
• What sampling
regime will be used: (stats)
1random, 2systematic, 3judgmental (or all 3)
1random, 2systematic, 3judgmental (or all 3)
• How
many samples are needed: (+ 5%)
1no of sites, 2no of methods, 3no of blanks
4replicates(at least 1 per 5-10 samples).
1no of sites, 2no of methods, 3no of blanks
4replicates(at least 1 per 5-10 samples).
• For monitoring
the frequency of sampling
needs to be considered. (manual, remote)
needs to be considered. (manual, remote)
