Risk evaluation of the examination of vacuum cleaner bags at AAgrunol, Groningen

Op en om het terrein van het voormalige bedrijf AAgrunol te Groningen zijn verhoogde gehaltes gemeten voor kwik en een aantal andere verbindingen. M.b.t. deze verontreiniging heeft de projectgroep AAgrunol, waarin zitting hebben de Gemeente Groningen, de RIMH, District Noord, de Provinciale Griffie en Provinciale Waterstaat besloten tot een risico-evaluatie van het Noord-westelijk deel van het terrein. Via de inspecteur heeft het RIVM opdracht ontvangen tot het uitvoeren van deze risico-evaluatie. Het bedrijf AAgrunol heeft op het terrein gedurende de jaren 1947-1983 diverse bestrijdingsmiddelen geproduceerd en een veelheid van bestrijdingsmiddelen opgeslagen en verhandeld. Hieronder bevinden zich zowel anorganische als organische bestrijdingsmiddelen en tevens diverse hulp- en grondstoffen.Abstract not availableHIM

Estimating transformation rates of pesticides, to be used in the TOXSWA model, from water-sediment studies

In the Dutch registration procedure the TOXSWA model is used to calculate the exposure of aquatic organisms to the pesticides applied in agriculture. The transformation rates in water and sediment, needed as input for the computations, are not asked directly in the registration procedure. Various test guidelines for water-sediment studies are discussed; they only yield pesticide dissipation rates in water and sediment. Water-sediment studies for three compounds were simulated with TOXSWA to estimate the transformation rates from the measured data. It was found that a detailed interpretation of the experiments and reported data is crucial before the water-sediment studies can be simulated correctly. Using the model, pesticide transformation could be assigned to mainly one of the layers or to both layers. These transformation rates do not depend on system properties, such as volumes of water and sediment, nor on the surface area of their interface. The procedure has to be tested for more pesticides and studies. The factors determining microbial transformation of pesticides in aquatic systems were studied; this allows improved characterization of the systems by measurements

Evaluation of pesticide leaching in lysimeter and field studies; parent substances

Investigation performed by order and for the account of the Directorate General for Environmental Protection, Directorate for Soil, Water and Agriculture, within the framework of project 601506, Consultancy on risk assessment for pesticides and biocide

The new decision tree for the evaluation of pesticide leaching from soils

The Dutch decision tree on leaching from soil has been re-designed to be more in line with EU guidelines on the assessment of the leaching potential of substances. The new decision tree explicitly defines reasonable worst-case conditions as the 90th percentile of the area to which a substance is applied. The spatially distributed model, GeoPEARL, is used to calculate the leaching. A report from RIVM, Alterra and TC

Scenarios for exposure of aquatic organisms to plant protection products in the Netherlands : part 1: Field crops and downward spraying

In the current Dutch authorisation procedure for calculating the exposure of surface water organisms to plant protection products, drift deposition is considered to be the only source for exposure of surface water organisms. Although drift can still be considered the most important source, atmospheric deposition and drainage may constitute important sources as well. Therefore, RIVM, PBL, Wageningen UR and the Board for the authorisation of plant protection products and biocides have derived a new procedure in which these two potential sources are included. The new procedure, described in this report, is restricted to downward spray applications in field crop

Scenarios for exposure of aquatic organisms to plant protection products in the Netherlands : part 1: Field crops and downward spraying

In the current Dutch authorisation procedure for calculating the exposure of surface water organisms to plant protection products, drift deposition is considered to be the only source for exposure of surface water organisms. Although drift can still be considered the most important source, atmospheric deposition and drainage may constitute important sources as well. Therefore, RIVM, PBL, Wageningen UR and the Board for the authorisation of plant protection products and biocides have derived a new procedure in which these two potential sources are included. The new procedure, described in this report, is restricted to downward spray applications in field crop

Development of an assessment methodology to evaluate agricultural use of plant protection products for drinking water production from surface waters : a proposal for the registration procedure in the Netherlands

Two tiers were developed to assess the drinking water standard of 0.1 μg/L at nine locations where surface water is abstracted to produce drinking water in the Netherlands. Two tiers were developed to assess the drinking water standard of 0.1 μg/L at nine locations where surface water is abstracted to produce drinking water in the Netherlands. In Tier I, concentrations at the abstraction points are calculated on the basis of edge-of field surface water concentrations for all crops in the intake area on which the pesticide can be used. The edge-of-field concentrations are corrected to estimate the concentration at the abstraction point by factors accounting for e.g. the relative cropped area of the intake area, degradation and difference in timing of application