Document ID: chunk:federal_register_of_legislation:F2013C00288:reg:4:p6
Version: federal_register_of_legislation:F2013C00288
Segment Type: reg
Provision Reference: reg 4 (pt 6/12)
Character Range: 753131–757278

(Barth & Mason 1984); one final wash sample per process batch or 1 in every 10 samples ground/sieved/processed, whichever is the smaller. Alternatively, treat a well-characterised control soil sample similarly. If there is significant carry-over due to the grinding/sieving process, the results from that process batch may have to be rejected.

    4.2.5         Sample Preparation Summary  Non-volatiles and semi-volatiles
Note: Analysis of volatile contaminants such as C6C10 fractions should be undertaken prior to any other analysis required from that sample. Sampling and sub-sampling for volatiles should be undertaken as described in Section 4.3 below.

All samples (non-volatile and semi-volatile)
    1. Remove vegetation and large stones and other particles (>5 mm) unless they are to be included for bulk analysis. Record proportion by weight with a description of each fraction of material removed.
    2. Select at least 25% by weight or 200 g of the laboratory sample, whichever is the smaller, including sufficient amounts for repeat analyses or other analysis on this same sample including moisture content (using field-moist sample).
Field-moist sample analysis                                                                                                                                                                                     Dried sample analysis
e.g. semi-volatiles, analytes for which drying may lead to losses  (Details in S.4.2.3)                                                                                                                         non-volatiles (Details in S.4.2.4)
3. (Intentionally left blank)                                                                                                                                                                                   3. Dry in oven or air chamber (40±3°C)
                                                                                                                                                                                                                Sample is dry when the loss in soil mass is not greater than 5% per 24 hours.
4. Grind in clean mortar and pestle to disaggregate soil particles and to produce a homogeneous test sample.                                                                                                    4. Where appropriate (usually organics, not metals), grind to disaggregate the soil particles, using a clean mortar and pestle or using other appropriate techniques, to obtain a homogeneous sub-sample.
 Where suitable (e.g. for non-volatiles)
5. For 'field-moist'metal samples or other inorganics or non-volatiles that are amenable to sieving (e.g. sandy loam), pass through a 2 mm plastic sieve.                                                       5. Pass through a mesh sieve (2 mm).
Ensure no extraneous particles in sample, otherwise analyse in air dried state.
6. Dry a separate sub-sample to determine moisture content (see method in Section 6). Report moisture content with analytical result so that analyte concentrations may be estimated on a 'dry-weight' basis.   6. Weigh the particles >2 mm diameter and set aside for later analysis if required (and to examine for large particles of solid contaminant if necessary).
                                                                                                                                                                                                                7. Partition the (<2 mm diameter) fraction with sample divider (e.g. riffler) or 'cone & quarter' or alternate comparable method. Ensure sufficient soil is obtained to cover all analyses, including repeats and QA. (See S 4.2.4.4)
                                                                                                                                                                                                                8. If small analysis portions (<10 g) are required, or smaller sieve sizes, grind at least 10 g of the <2 mm fraction to pass through smaller mesh sieves (0.15, 0.5 or 1.0 mm sieve size for sample sizes