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

Table I: Dichlorvos Use ScenariosScenario Crop/Use Method Rate ApplicationsEquipment Details Formu-lationApplicationrateArea orvolumetreatedNo. peryearInterval(days)22 Manual Fog EC 0.05 & 0.151 -23foggerg a.i./ m 32 724 High Fine- EC 0.1 & 0.3 150, 1 -pressure mediumg a.i./ m 2 1500 &25 hand-wand droplet2500 m 2 2 7orequivalent26 Domestic use RTU Aerosol 3.1 0.25 g 7.44 m 2 1 -aerosol (manual g a.i./L a.i./m 227 )2 728 Knapsack FinemediumRTU 0.3 g a.i./m 2 60 m 2 1 -29liquida.i./L;4Lpack)droplet (4.4g2 7Outdoor – public space30 Public outdooruseManualfoggerFog EC 1500 ga.i./ha1 ha 1 -3.2 The occupational (work) activities for which exposure is estimated are mixing,loading (usually grouped, M/L) and application, together termed operatorexposures, and workers entering the spray area after application, for example toweed or harvest the crop, termed post-application or re-entry activities.3.3 To estimate risks to operators at application and workers entering the sprayedareas post-application, exposures are predicted under likely use patterns, takinginto consideration the time worked, and the use of mitigation measures.3.4 During mixing, loading and application mitigation measures include: engineeringcontrols such as contained or closed mixing and loading systems, and closed cabswith or without filtered air supplies; Personal Protective Equipment (PPE); and/orRespiratory Protective Equipment (RPE).3.5 For workers post-application mitigation measures include: recommendations notto (re-)enter sprayed areas for set periods, or Restricted Entry Intervals (REI); PPEand/or RPE.3.6 For bystanders, risks to residents are only estimated from exposure of a child tosurfaces contaminated either by being directly sprayed or from spray drift,because of concerns with model approaches for assessing direct exposures tospray drift or re-volatilised spray. In certain circumstances, such as workplaces,Dichlorvos reassessment – application Page 282 of 436