Leaching limit values

Leaching residues from zinc processing, dusts and sludges such as jarosite, hematite, goethite, etc.

Leaching limit values The following leaching limit values apply for granular waste acceptable at landfills for hazardous waste, calculated at L/S = 2 and 10 l/kg for total release and directly expressed in mg/l for C0 (in the first eluate of percolation test at L/S = 0,1 l/kg).

leaching,

Pressure leaching may be an alternative to roasting and may be considered as a BAT for new plants depending on the concentrate characteristics.

(c) Scrubbing methods have been developed which include pre-quenching of the waste gas, leaching by high-performance scrubbing and separation by drip deposition.

by leaching fermented grape marc with water.

livestock density shall be defined taking into account all grazing livestock kept on the farm or, in the case of a commitment to limit nutrient leaching, all animals kept on the farm which are relevant to the commitment in question.

The Committee noted that it is possible that lysimeter studies demonstrate lack of leaching for one or more use scenarios but none were reported.

Clean tubes and screw-caps by leaching several hours in perchloric acid (4.11), followed by five subsequent rinsings with water (4.2), and finally dry at 100 °C.

Clean tubes and screw-caps by leaching several hours in perchloric acid (4.11), followed by five subsequent rinsings with water (4.2), and finally dry at 100 °C.

the proportion of the temporary export goods destroyed and lost during the processing operation, in particular by evaporation, desiccation, venting as gas or leaching;

In its second opinion fn the Scientific Committee concluded that concentrations of TFMBA leaching to groundwater from soils with pH above 5 may exceed 0,1 g/l in a small percentage of cases/situations.

livestock density shall be defined taking into account all grazing livestock kept on the farm or, in the case of a commitment to limit nutrient leaching, all animals kept on the farm which are relevant to the commitment in question.

(8) The report on iprodione and further information were also submitted to the Scientific Committee on Plants for separate consultation. The Scientific Committee was asked to comment on the predicted environmental concentrations in soil and groundwater, and on the acceptable operator exposure level proposed by the rapporteur. In its opinion, the Committee agreed that sufficient information was available to reliably estimate the leaching behaviour of the substance for soils with pH above 6. However, the assessment of leaching in soils with pH below 6 deser ves further attention, since, for soils with pH below 6, leaching at concentration levels exceeding 0,1 μg/l may occur in some realistic vulnerable situations. The Committee saw no need to use an additional safety factor for the derivation of the acceptabl e operator exposure level. The observations of the Scientific Committee were taken into account in this Directive and the review report.

(13) As regards fosthiazate, the Scientific Committee was asked to comment on the potential for leaching to groundwater, on the risk to soil dwelling non- target organisms, on the risk to birds and wild mammals, and on the possible risk of organophosphate- induced delayed polyneuropathy (OPIDP) in humans following severe poisoning incidents.

Field leaching studies

Column leaching studies

Aged residue column leaching

the potential for leaching to ground water,

Lysimeter studies or field leaching studies

Pressure leaching

The testing shall consist at least of a batch leaching test.

"eluate" means the solution obtained by a laboratory leaching test;

Data on the composition of the waste and the leaching behaviour, where relevant

In addition to the leaching behaviour, the composition of the waste must be known or determined by testing.

However, the assessment of leaching in soils with pH below 6 deserves further attention, since, for soils with pH below 6, leaching at concentration levels exceeding 0,1 >ISO_7>i>ISO_1>g/l may occur in some realistic vulnerable situations.

These criteria should, in particular, take into account the short, medium and long term leaching behaviour of such waste.

In addition to the leaching limit values under section 2.3.1, granular wastes must meet the following additional criteria:

if required, the leachability of the wastes determined by a batch leaching test and/or a percolation test and/or a pH dependence test,

Other criteria In addition to the leaching limit values under section 2.4.1, hazardous wastes must meet the following additional criteria:

Use of filter devices such as those which incorporate short inlet and outlet PVC-coated tubing has not resulted in significant leaching of DEHP.

The test should provide sufficient data to estimate the mobility and leaching potential of relevant metabolites, degradation and reaction products.

Scrubbing methods have been developed which include pre-quenching of the waste gas, leaching by high-performance scrubbing and separation by drip deposition.

In its opinion, the Committee agreed that sufficient information was available to reliably estimate the leaching behaviour of the substance for soils with pH above 6.

The test should provide sufficient data to evaluate the mobility and leaching potential of the active substance and relevant metabolites, degradation and reaction products.

The model calculations of the leaching behaviour of isoxaflutole and its degradation products were subsequently revised along the lines suggested by the Scientific Committee.

Intermediate sampling must be avoided, since removal of plants (except for harvesting according to normal agricultural practice) and soil cross influences the leaching process.

Limit values for total content of organic parameters In addition to the leaching limit values under section 2.1.2.1, inert wastes must meet the following additional limit values:

The test should provide sufficient data to evaluate the mobility and leaching potential of the active substance and if possible of relevant metabolities, degradation and reaction products.

In a second consultation on the same substances the Scientific Committee was asked to comment on the appropriate degradation kinetics to be assumed in model calculations of the leaching behaviour.

This constitutes a thorough determination, according to standardised analysis and behaviour-testing methods, of the short and long-term leaching behaviour and/or characteristic properties of the waste.

In its second opinion(8) the Scientific Committee concluded that concentrations of TFMBA leaching to groundwater from soils with pH above 5 may exceed 0,1 g/l in a small percentage of cases/situations.

The Scientific Committee for Plants was consulted twice, mainly to assess the potential leaching of two metabolites of the active substance, 3-trifluoromethylbenzoic acid (TFMBA) and trifluoroacetic acid (TFAA).

Test conditions The period(s) of ageing should be determined from inspection of the degradation patterns of active substance and metabolites to ensure that a relevant spectrum of metabolites is present at the time of leaching.

Circumstances in which required Expert judgement will be necessary to decide whether field leaching studies or lysimeter studies should be carried out, taking into account the results of degradation and mobility studies and the calculated PECs.

stable, non-reactive hazardous wastes (e.g. solidified, vitrified), with leaching behaviour equivalent to those of the non-hazardous wastes referred to in point (ii), which fulfil the relevant acceptance criteria set out in accordance with Annex II.

The factors to be considered in making PECs estimations relate to direct and indirect application to soil, drift, run off, and leaching and include processes such as volatilization, adsorption, hydrolysis, photolysis, aerobic and anaerobic degradation.

The following leaching limit values apply to granular hazardous waste acceptable at landfills for non-hazardous waste, calculated at L/S = 2 and 10 l/kg for total release and directly expressed in mg/l for C0 (the first eluate of percolation test at L/S = 0,1 l/kg).

The following leaching limit values apply for waste acceptable at landfills for inert waste, calculated at liquid to solid ratios (L/S) of 2 l/kg and 10 l/kg for total release and directly expressed in mg/l for C0 (the first eluate of percolation test at L/S = 0,1 l/kg).