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5. In respect of a supply which comprises intermediate tanks and distribution, the risk assessment shall include provision in relation to the relevant matters specified in Table C of this Schedule.
SOURCE AND CATCHMENT
(1) Source of supply | (2) Information to be considered in the risk assessment |
---|---|
(1) Catchments | (i) geology and hydrology (ii) meteorology and weather patterns (iii) general catchment and river health (iv) wildlife (v) competing water uses (vi) nature and intensity of development and land use (vii) other activities in the catchment that potentially release contaminants into source water (viii) planned future activities |
(2) Surface water | (i) description of water body type (e.g. river, reservoir, dam) (ii) flow and reliability of source water (iii) retention times (iv) water constituents (physical, chemical, microbial) (v) protection (e.g. enclosures, access) (vi) recreational and other human activity (vii) bulk water transport |
(3) Groundwater | (i) confined or unconfined aquifer (ii) aquifer hydrogeology (iii) flow rate and direction (iv) dilution characteristics (v) recharge area (vi) wellhead protection (vii) depth of casing (viii) bulk water transport |
TREATMENT
(i) treatment process (ii) equipment design (iii) monitoring equipment and automation (iv) water treatment chemicals used (v) treatment efficiencies (vi) disinfection removals of pathogens (vii) disinfection residuals/contact time (viii) maintenance schedules |
INTERMEDIATE TANKS AND DISTRIBUTION
(i) reservoir/tank design (ii) retention times (iii) seasonal variations (iv) protection (e.g. covers, enclosures, access) (v) distribution system design (vi) hydraulic conditions (e.g. water age, pressures, flows) (vii) backflow protection (viii) disinfection residuals (ix) maintenance and cleaning schedules |
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