# The Cambridge Waste Water Treatment Plant Relocation Order 2025, Part 4: PRIMARY SETTLEMENT TANKS (WORK No. 6)


(1) Item
(2) Maximum design parameter
Finished ground level (+ or – 0.5m)
9.5m AOD
Total surface area of circular or rectangular primary settlement tanks
6,451m2
Number of primary settlement tanks
6 No.
Depth
1.5m AOD (8m below FGL)
Foundations
Piles to a depth of -15.5m AOD (25m below FGL)
Height
15.5m AOD (6m above FGL)
Overall footprint of primary settlement tanks area
175m x 115m
Ferric dosing plant area including kiosk
20m x 5m
Ferric dosing plant: height
14.5m AOD (5m above FGL)

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Source: https://www.legislation.gov.uk/uksi/2025/452/schedule/14/part/4 (the official version)
Page: https://openlegislation.uk/cambridge-waste-water-treatment-plant-relocation-order-2025/schedule-14/part-4
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.