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CH3041
MONITORING
• Analyses must be carried out for more than just the target analyte if compounding
effects are anticipated.
eg1. SO2 / PM10 dust   synergism
  worse than the sum of the components
eg2. NH3 / H+               antagonism
   NH3 is toxic to fish, not NH4+ ie. f(pH)
Monitoring has various scales :
a) widespread is used at the start.
b) the critical path where progressively  
    higher concentrations are found.
c) the critical group with the highest risk.