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15
CH3041
QUALITY CONTROL
• As an illustration of the effect of quality
control the analyses below were carried out
on Freshwater Creek.
• EPA
• NHT(DPI)
• WW
• The EPA
data were
collected over
a longer period than the National Heritage Trust data. The Water Watch results show a huge unreliable range due to poor quality control – running blanks, controls and interlab checking is essential.