# The Cambridge Waste Water Treatment Plant Relocation Order 2025, Part 15: GAS HANDLING EQUIPMENT OPTIONS (WORK Nos. 8 and 9)


(1) Item
(2) Number
(3) Maximum design parameters
(4) Maximum height
(5) Maximum Capacity
Finished ground level (+ or – 0.5m)
–
–
9m AOD
–
Gas holder/gas bag (Work No. 8)
1
17m diameter
29m AOD (20m above FGL) including lightning protection
2,000m3
Flare stack (Work No. 8)
1
24m AOD (15m above FGL)
2,000m3/hr
Footprint of biogas storage and operational area (Work No. 8)
170m x 50m
Foundation depth
Piles to a depth of -16m AOD (25m below FGL)
EITHER
Biogas upgrading plant (Work No. 9)
1
50m x 50m
21m AOD (12m above FGL)
1,000m3/hr
OR
Combined heat and power (CHP) plant (Work No. 9)
2 CHP engines
50m x 50m
33m AOD (24m above FGL) stack combined with boiler flue (see Part 16 below)
1.5 MW thermal input per CHP engine (total maximum 3MWth)

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Source: https://www.legislation.gov.uk/uksi/2025/452/schedule/14/part/15 (the official version)
Page: https://openlegislation.uk/cambridge-waste-water-treatment-plant-relocation-order-2025/schedule-14/part-15
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.