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Table 2 Criteria for frequency of monitoring of target chemicals in

From: Clustering and prioritization to design a risk-based monitoring program in groundwater sources for drinking water

Criteria for target chemicals

Advice for frequency in monitoring program

Non-detectable

Low frequency

Detected only in source water not in produced water, BQ <0.001 or <0.01 µg/L for targets without (p)GLV

Moderate low frequency

Detected in produced drinking water, BQ<0.001 or <0.01 µg/L for targets without (p)GLV

Moderate high frequency

Other

High frequency