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

Table XXIII: 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 -Operator exposures and risk assessment:7.2 Scenarios 1-16 give unacceptable risks for operators (mixer/loader/applicators),even with PPE, RPE and engineering controls, where appropriate, except forScenarios (9 & 10) (automated fogging operations with RTU gas in glasshouses insome cases) and Scenarios (13 & 14) (automated fogging with EC solutions inCymbidium production, with restrictions). No outdoor uses of dichlorvos instrawberries, vegetables, cereal berries, fruit trees or passion fruit gave acceptableoperator risk estimates (Scenarios 1-8).7.3 Vegetables/Mushrooms: RTU dichlorvos gas through automatic spray systems at50 mg/m 3 may be used for the fogging of glasshouse crops/ mushrooms(Scenarios 9 & 10), provided: work day exposure is limited to the use of only onedichlorvos gas cylinder, and half-face respirator, chemical-resistant gloves,overalls, eye protection and boots are worn. Two dichlorvos gas cylinders, as amaximum, can be handled in a day (see Table VI) provided: a full-face respirator,chemical-resistant gloves, overalls, eye protection and boots are worn duringcylinder changeover. The cylinder change over restriction means that only small(approximately 0.25 ha) spaces can be treated with 7 L cylinders, but treatment oflarger spaces (up to 1.25 ha) is possible using 35L cylinders using automatedsystems.Dichlorvos reassessment – application Page 343 of 436