Table 3.9 (continued) Use Indicative treatment processes On-site preventive measures Water quality objectives Secondary treatment with for human vegetation screening, Pa • helminth reduction (>25 days consumption) or anemometer of lagoon detention or an switching equivalent filtration process) Public in vicinity of site sture or and disinfection soluble BOD5 fodder crop No public access during • • or <20 mg/L irrigation irrigation Primary treatment with SS <30 mg/L (including • 25–30 m buffer distance • • >50 days of lagoon detention hay, silage Disinfectant residual to nearest public access • and disinfection and (eg minimum chlorine point commercial residual) or UV dosea Spray drift control, eg • fodder <100 per E. coli through low-throw • production). 100 mL sprinklers, Limited microsprinklers, drippers, withholding part circle sprinklers period (180º inward throw), vegetation screening, or anemometer switching Exclude grazing animals • for 5 days after irrigation. Fodder dried or ensiled • (not for human consumption) Secondary treatment with Pasture or • helminth reduction (>25 days fodder crop Public in vicinity of site of lagoon detention or an irrigation No public access during • equivalent filtration process) (including irrigation hay, silage or soluble BOD5 • 25–30 m buffer distance • <20 mg/L and Primary treatment with • to nearest public access commercial >50 days of lagoon detention SS <30 mg/L • point fodder <1000 per E. coli Spray drift control, eg • • production). 100 mL Exclude lactating dairy • through low-throw With cattle from pasture for sprinklers, withholding four hours or until pasture is microsprinklers, drippers, period. dry. part circle sprinklers Fodder dried or ensiled (not (180º inward throw), • BOD5 = biochemical oxygen demand over 5 days; SS =suspended solid; UV = ultraviolet Aim is to demonstrate reliability of disinfection and ability to consistently achieve microbial quality a
Table 3.9 (continued) Use Indicative treatment processes On-site preventive measures Water quality objectives Pa sture or fodder crop irrigation (including hay, silage and commercial fodder production). Limited withholding period Pasture or fodder crop irrigation (including hay, silage and commercial fodder production). With withholding period. • Secondary treatment with helminth reduction (>25 days of lagoon detention or an equivalent filtration process) and disinfection or • Primary treatment with >50 days of lagoon detention and disinfection • Secondary treatment with helminth reduction (>25 days of lagoon detention or an equivalent filtration process) or • Primary treatment with >50 days of lagoon detention • Exclude lactating dairy cattle from pasture for four hours or until pasture is dry. • Fodder dried or ensiled (not for human consumption) Public in vicinity of site • No public access during irrigation • 25–30 m buffer distance to nearest public access point • Spray drift control, eg through low-throw sprinklers, microsprinklers, drippers, part circle sprinklers (180º inward throw), vegetation screening, or anemometer switching • Exclude grazing animals for 5 days after irrigation. • Fodder dried or ensiled (not for human consumption) Public in vicinity of site • No public access during irrigation • 25–30 m buffer distance to nearest public access point • Spray drift control, eg through low-throw sprinklers, microsprinklers, drippers, part circle sprinklers (180º inward throw), vegetation screening, or anemometer switching • soluble BOD5 <20 mg/L • SS <30 mg/L • Disinfectant residual (eg minimum chlorine residual) or UV dosea • E. coli <100 per 100 mL • soluble BOD5 <20 mg/L • SS <30 mg/L • E. coli <1000 per 100 mL BOD5 = biochemical oxygen demand over 5 days; SS =suspended solid; UV = ultraviolet a Aim is to demonstrate reliability of disinfection and ability to consistently achieve microbial quality
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