| Req ID | Category | Intent | Legal Status | Name | Subdomain(s) | Context | Conditions | Confidence |
|---|---|---|---|---|---|---|---|---|
| #Q001 | administrative | operational | mandatory | MOE Consideration of WQGs | drinking water, agricultural water, aquatic life, other | WQGs do not have any direct legal standing, but are MOE policy and must be considered in any decision affecting water quality made within the MOE. | In any decision affecting water quality made within the MOE | high |
| #Q002 | corrective_action | operational | guidance | Additional Investigation for Long-Term WQG Exceedance | drinking water, agricultural water, aquatic life, other | Note that exceeding a long-term water quality guideline does not imply that an unacceptable risk exists, but rather that the potential for adverse effects may be increased and additional investigation may be required for consideration in resource management decisions. | Exceeding a long-term water quality guideline | high |
| #Q003 | monitoring | operational | mandatory | Comparison of Individual Samples for Insufficient Monitoring | drinking water, agricultural water, aquatic life, other | If the monitoring frequency at a site is insufficient to meet the requirements for the specified averaging period of the long-term average WQG (often 5 samples over 30 days), then individual samples will be compared against the long-term average WQG. | If the monitoring frequency at a site is insufficient to meet the requirements for the specified averaging period | high |
| #Q004 | monitoring | operational | guidance | Alert Signal for Increased Monitoring Frequency | drinking water, agricultural water, aquatic life, other | In this case, failure of any individual sample to meet the long-term average guideline would serve as an alert signal to increase the monitoring frequency. | Failure of any individual sample to meet the long-term average guideline when monitoring frequency is insufficient | high |
| Req ID | Category | Intent | Legal Status | Name | Subdomain(s) | Limit Type | Limit Value | Context | Conditions | Confidence |
|---|---|---|---|---|---|---|---|---|---|---|
| #R001 | operational | operational | guideline | Long-term average WQG averaging period frequency | drinking water, agricultural water, aquatic life, other | requirement | 5 samples in 30 days | Averaging period approach for long-term average (chronic) guidelines | Used to address long-term effects and fit into monitoring timetables | high |
| #R002 | operational | operational | guideline | Short-term maximum WQG exposure period | aquatic life | requirement | 96 hrs | Defined short-term exposure period for acute WQGs | To assess risks associated with infrequent exposure events such as spills | high |
| #R003 | operational | operational | guideline | Long-term average WQG monitoring frequency threshold | drinking water, agricultural water, aquatic life, other | requirement | 5 samples over 30 days | Criteria for applying long-term average WQG to individual samples | When monitoring frequency at a site is insufficient to meet specified averaging period | high |
| Req ID | Category | Name | Context | Confidence |
|---|---|---|---|---|
| #D001 | MOE | Ministry of Environment | high | |
| #D002 | WQGs | water quality guidelines | high | |
| #D003 | short-term maximum (i.e. acute) WQG | A short-term maximum (i.e. acute) WQG is a level that should never be exceeded in order to meet the intended protection of the most sensitive species and life stage against severe effects such as lethality over a defined shortterm exposure period (e.g. 96 hrs). | medium | |
| #D004 | Long-term average (i.e. chronic) WQGs | Long-term average (i.e. chronic) WQGs are intended to protect the most sensitive species and life stage against sub-lethal and lethal effects for indefinite exposures. | high |