2.—(1) Samples of leachate or surface water (if present) must be collected at representative points.
(2) Sampling and measuring of the volume and composition of any leachate must be performed separately at each point at which leachate is discharged from the site.
(3) Monitoring of surface water (if present) shall take place at at least two points, one upstream from the landfill and one downstream.
(4) Gas monitoring must be carried out for each section of the landfill and representative samples must be collected and analysed in accordance with Table 1.
(5) A representative sample of leachate and water shall be taken for monitoring purposes in accordance with Table 1.
| Operational phase | After-care phase1 | |
|---|---|---|
Notes to Table 1 | ||
1 Longer intervals may be allowed if the evaluation of data indicates that they would be equally effective. For leachates, the conductivity must always be measured at least once a year. | ||
2 These do not apply where leachate collection is not required under paragraph 2(1)(c) of Schedule 2. | ||
3 The frequency of sampling may be adapted on the basis of the morphology of the landfill waste (in tumulus, buried, etc) (but only if the Environment Agency considers that the conditions of the landfill permit should allow for it). | ||
4 The parameters to be measured and substances to be analysed vary according to the composition of the waste deposited. They must be specified in the conditions of the landfill permit and reflect the leaching characteristics of the wastes. | ||
5 On the basis of the characteristics of the landfill site, the Environment Agency may determine that these measurements are not required. | ||
6 These measurements are related mainly to the content of the organic material in the waste. | ||
7 CH4, CO2, O2 regularly, other gases as required, according to the composition of the waste deposited, with a view to reflecting its leaching properties. | ||
8 Efficiency of the gas extraction system must be checked regularly. | ||
| Leachate volume2 | Monthly1, 3 | Every six months |
| Leachate composition2, 4 | Quarterly1 | Every six months |
| Volume and composition of surface water5 | Quarterly1 | Every six months |
| Potential gas emissions and atmospheric pressure6 (CH4, CO2, O2, H2S, H2 etc) | Monthly1, 7 | Every six months8 |