The procurement contact named on the official notice.

United Utilities (UU) require ambient bioaerosol monitoring and analysis to be completed at 5 Anaerobic Digestion facilities, located in the North West of England.

The monitoring is to be carried out twice a year.

The initial term will be 5 years plus annual incremental extensions if required.

Operators must adhere to UU permitting and induction requirements.

The operator will need to attend site, the following samples will be taken: • Substance - Bioaerosols (pumped method) Total Bacteria Aspergillus Fumigatus • Sampling Method - Filtration method • 4 samples per site The 1 x Upwind and 3 x Downwind Samples will be determined at the time of sampling considering the wind directions on the day.

The sampling method is designed to measure ambient bioaerosol concentrations and follows the general guidance published by the Environment Agency Technical Guidance Note M9 – Environmental Monitoring of Bioaerosol at Regulated Sites.

The Supplier needs to provide a detailed report, which must be provided within a reasonable timeframe, that includes an executive summary, site observations, monitoring methods, analytical results, comparison of results with limits/recognised international standards, discussions and conclusions.

Monitoring will be undertaken, in accordance with the most appropriate Methods of Determining Hazardous Substances (MDHS) published by HSE or by internationally recognised standards or methods e.g.

NIOSH, BS EN ISO, OSHA.

The general principle adopted to obtain airborne samples of hazardous substances is by attaching battery powered pumps to individuals or in static locations.

Known volumes of air are drawn through sample media (filters, sorbent tubes or impinger solutions) positioned in the individual’s breathing zone or for background measurements fixed in static locations.

Depending on the analysis required the sample media will undergo subsequent mechanical, chemical or biological analysis.

All analytical work shall be undertaken at UKAS accredited analytical laboratories which participate in the AIR PT scheme, operated by LGC with support from HSL that is specifically designed for laboratories performing chemical analysis of air monitoring samples.