Replacement Instrumentation for use on the UK Automatic Hydrocarbons Network. Approach to Trial, Purchase and Equipment Support new Instrumentation from 2021 – 2025

The Automatic Hydrocarbons Network is currently operated for the Environment Agency by the Network Contractors, which at the time of contract issue for this capital procurement is Ricardo Energy & Environment, although this may be subject to change. Presently the network constitutes four TD-GC-FID ozone precursor analysers . These instruments are used to measure 29 of the 31 VOCs listed in Annex X of the Air Quality Directive 2008/50/EC (AQD). Theses VOCs are known as Non-Methane Volatile Organic Compounds (NMVOCs). The objective of these measurements as described in Annex X of the AQD:

• to analyse any trend in ozone precursors
• to check the efficiency of emission reduction strategies
• to check the consistency of emission inventories and
• to help attribute emission sources to observed pollution concentrations