| #Q001 | administrative | operational | mandatory | Exercise care in applying guidelines for continuously renewed concentrations | aquatic life, drinking water, recreational water | Care must be exercised when the water quality guidelines are applied to assess environmental impacts of ethylbenzene, since there will be situations where ethylbenzene concentrations are continuously renewed (e.g., discharge from an industrial operation). | Situations where ethylbenzene concentrations are continuously renewed | high |
| #Q002 | monitoring | operational | recommended | Site-specific studies for continuously renewed concentrations | aquatic life, drinking water, recreational water | In these types of situations, a site-specific study should be undertaken and appropriate site-specific water quality objectives developed based on species present and actual ethylbenzene persistence and concentrations. | Situations where ethylbenzene concentrations are continuously renewed (e.g., discharge from an industrial operation) | high |
| #Q003 | monitoring | operational | mandatory | Site-specific impact studies for less stringent objectives | aquatic life, drinking water, recreational water | Site-specific impact studies would be required in such cases. | When socioeconomic or other factors may justify objectives which are less stringent than the guidelines | high |
| #Q004 | administrative | operational | guidance | Methods to set site-specific water quality objectives | aquatic life, drinking water, recreational water | Where necessary, these methods can be employed to set site-specific water quality objectives. | To adapt the recommended guidelines to a given site by considering modifying factors | high |