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At a minimum, continuous monitoring should be undertaken as part of Assumption and Verification inspections in the following situations:
At a minimum, continuous monitoring should be undertaken as part of Assumption and Verification inspections in the following situations:
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#For infiltration BMPs designed without sub-drains to determine active sub-surface water storage reservoir volume drainage time and filter bed surface infiltration rate.
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#When little information is available about the effectiveness of a certain type of BMP or treatment train (i.e., combination of BMPs) or when a new technology is being implemented for the first time in a certain context.
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#For infiltration BMPs designed with flow-restricted sub-drains, to determine sub-drain peak flow rate, active sub-surface water storage reservoir volume drainage time and filter bed surface infiltration rate.
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#Where the sensitivity of the receiving water warrants a high level of inspection and testing to determine if BMP effluent quality meets design specifications or regulatory criteria.
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#As part of Forensic inspection and Testing (FIT) work to determine corrective actions for suspected problems with drainage or effluent quality detected through other inspection and testing work.
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#As part of Forensic inspection and Testing (FIT) work to determine corrective actions for suspected problems with drainage or effluent quality detected through other inspection and testing work.}}
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#When little information is available about the effectiveness of a certain type of BMP in a certain environmental context, or when a new technology is being implemented for the first time in a certain context or geographic region.
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#Where the sensitivity of the receiving water warrants a high level of inspection and testing to determine if BMP effluent quality meets design specifications or regulatory criteria.}}
===External guidance on monitoring the performance of stormwater BMPs===
===External guidance on monitoring the performance of stormwater BMPs===