Application for the Reassessment of a Hazardous Substance under ...

6.1.11 Controls to protect bystandersRestriction of application methods to handheld or automatedfogging equipment should restrict the level of exposure posed tooperators;Use of automated remote delivery systems (i.e. no human exposureduring application) should provide a means to reduce operatorexposure to acceptable levels.6.1.11.1 Bystanders will be protected if they are kept a sufficient distance fromthe application area during application and are excluded from theapplication area for a suitable period of time after application. Methodsof doing this could include use of buffer zones, notification/signage,timing of applications to avoid times when the public are in the area andrestricted entry intervals.6.1.11.2 ERMA New Zealand, however, does not have the information todetermine any REIs for this Use Scenario.6.1.12 Controls to protect the environment6.1.12.1 No quantitative modelling of environmental exposure arising fromoutdoor, public health use of dichlorvos has been performed.Nevertheless, spray drift or runoff from treated areas could contaminatethe environment. Controls applied by APVMA (2008) to manage thisrisk are appropriate in New Zealand:Do not apply under meteorological conditions or from sprayequipment that could be expected to cause spray drift onto naturalstreams, rivers or waterways;Avoid excess spraying causing run-off from treated surfaces intountreated areas;Allow treated areas to dry before washing (or irrigating);Do not apply to exposed areas if rain is expected within 4 hours.Use Scenario 31: biosecurity fruit fly monitoring programme6.1.13 Controls to protect workers6.1.13.1 Specified PPE/RPE:The level of exposure through use can likely be reduced throughuse of PPE and RPE.6.1.13.2 Limit number of traps to be serviced per day:The level of exposure is proportional to the number of strips that anoperator handles each day.The number of traps/strips handled by operators per day should berestricted to ensure the level of PPE / RPE proposed is adequate toprevent inhalation exposure.Dichlorvos reassessment – application Page 80 of 436