Waste sampling guidelines
The purpose of sampling is to characterize the waste that is scheduled to be removed to the Environmental Services Company and determine the manner in which it will be treated. These directions are intended for waste that has been defined as dangerous only.
It is important to prepare a sampling plan in order to receive a representative sample of the waste. For this purpose, the following factors must be considered:
- Waste type: liquid, solid, sludge
- Waste packaging: Packages (drums, IBC, FIBC) or bulk (pool, tank, heap).
- Quantity of waste: Number of packages or bulk volume.
The type of waste will be determined using the sampling and sample volume method.
The quantity and packaging of waste will determine the number of sampling points.
The specimen that is sent to the Environmental Services Company’s laboratory will be one that represents all waste rather than just a single point out of all waste. To ensure this condition, the waste must be sampled at a number of points.
The number of sampling lots will be determined according to the quantity of waste: The representative specimen will be taken based on a statistic algorithm.
The following table shows the number of lots to be sampled in accordance with the number of packages or bulk volume:
|Bulk volume – m3||Number of packages||Number of sampling lots|
Directions for selection of sampling points:
- Waste in packages: Not more than one sample is to be taken per packages. The packges sampled must be chosen at random out of all packages.
- Waste in a pool: Random sampling must be performed from the entire pool volume and depth. To clarify, a specimen that is taken from the pool surface near the edge of the pool will constitute at the most a single sample.
- Heaped waste: Random sampling must be performed from the entire volume and depth of the heap. To clarify, a specimen that is taken from the heap surface will constitute at the most a single sample.
- Waste in a tank: Waste that is in a tank that fills up continuously or cyclically can be sampled in the same manner as a pool. Alternatively, the sampling may be performed by taking a specimen from the tank’s feed pipe, at various times during the activity cycle.
- Specimens of fluids / effluents will be of a minimum volume of 1 liter.
- Specimens of solids / sludges will be of a minimum weight of 5 kg.
Packaging of the specimen:
- Specimens of alkaline fluids / effluents are to be taken using a glass / plastic / metal vessel.
- Specimens of acidic fluids / effluents are to be taken using a glass / plastic vessel.
- Specimens of organic solvent fluids / effluents are to be taken using a glass / metal vessel.
- Specimens of solids / sludges are to be taken using plastic / metal buckets.
Manner of sampling:
Directions on the manner of sampling, sampling measures and use may be found in:
BS EN 14899:2005