No qualitative requirements.
| Req ID | Category | Intent | Legal Status | Name | Subdomain(s) | Limit Type | Limit Value | Context | Conditions | Confidence |
|---|---|---|---|---|---|---|---|---|---|---|
| #R001 | operational | operational | guideline | standard drinking water consumption rate (1986) | drinking water | requirement | 1.5 L/day | Used in the calculation of the 1986 drinking water guideline | standard rate for rats/mice to human correction | high |
| #R002 | chemical | health | guideline | unit lifetime risk (1986) | drinking water | requirement | 6.1 × 10-7 to 6.7 × 10-6 risk per 1 µg benzene/L | Estimated range for ingestion based on NTP (1986) study | Based on leukaemia/lymphomas in mice and oral cavity squamous cell carcinomas in rats | high |
| #R003 | chemical | health | guideline | unit lifetime risk (Health Canada, 2005a) | drinking water | requirement | 2.03 × 10-6 to 4.17 × 10-6 risk per 1 µg benzene/L | Estimated range using linearized multistage model and allometric scaling factor | Lower bound (malignant lymphoma in female mice); upper bound (bone marrow haematopoietic hyperplasia in male mice) | high |
| #R004 | operational | operational | guideline | human drinking water consumption rate (total exposure) | drinking water | requirement | 3.5 L-eq/day | Assumed rate to account for additional uptake through dermal and inhalation exposure | Estimated using Krishnan (2004) | high |
| #R005 | chemical | health | guideline | lifetime risk (Pliofilm cohort) | drinking water | requirement | 4.8 × 10-6 risk per 1 µg/L | Estimated from Pliofilm cohort inhalation data extrapolated to ingestion | 95% CI; assumes 3.5 L-eq/day consumption | high |
| #R006 | chemical | health | guideline | lifetime risk (Chinese worker cohort) | drinking water | requirement | 6.3 × 10-6 risk per 1 µg/L | Estimated from Chinese worker cohort inhalation data extrapolated to ingestion | 95% CI; assumes 3.5 L-eq/day consumption | high |
| #R007 | operational | operational | guideline | standard body weight | drinking water | requirement | 70 kg | Standard value used for converting inhalation unit risks to ingestion unit risks | high | |
| #R008 | operational | operational | guideline | breathing rate | drinking water | requirement | 20 m3/day | Standard value used for converting inhalation unit risks to ingestion unit risks | high | |
| #R009 | operational | operational | guideline | inhalation absorption rate | drinking water | requirement | 50 % | Standard rate used for risk conversion | high | |
| #R010 | operational | operational | guideline | benzene air conversion factor | drinking water | requirement | 3190 µg/m3 per ppm | Factor used to convert air concentrations | 1 ppm = 3190 µg/m3 | high |
No definitions.