Overall, data from 36 geotechnical samples were included in the deposit models.These comprised a combination of test pit, window sample and cable percussionborehole data. The distribution of the boreholes is illustrated in Figures 2 and 3 and the locations listed in Table 1. The maximum depth achieved was 12.5m below current ground level (BGL). For comparison, data from 7 geoarchaeological borehole samples from Plot 5000 has been included to assess the continuity of the Wentlooge Formation and these locations are presented in Table 2. A pdf of the graphical borehole logs, along with AGS compatible digital database was provided by the client as an Excel workbook. The digital data was imported into geological modelling software (Rockworks 2022) for correlation of lithological data into stratigraphic units. Correlation was carried out in tandem with analysis of a series of data layers in GIS software (QGIS). The layers included Environment Agency (EA) LiDAR data (Figure 3), and BGS 1:50,000 Superficial Geology. The litho-stratigraphic borehole profiles were arranged into four transects, Transect A, Transect B, Transect C and Transect D, which dissected the site broadly E-W, NE-SW and N-S respectively. These were then exported and illustrated in Figures 5-8. Oxford Archaeology (OA) was commissioned by BSA Heritage on behalf of Avonmouth Industrial Estates (UK) Ltd to prepare a geoarchaeological deposit model to inform archaeological mitigation for the redevelopment of the former Avlon Works site. The site is located within an area of significant historic environmental and archaeological interest, comprising the historic Avon Levels and the Severn Estuary. Although no designated heritage assets were identified in the archaeology and heritage statement (BSA Heritage, 2021), several historic medieval or post-medieval farmstead sites are recorded by the South Gloucestershire Historic Environment Record (HER) both within the site and the vicinity. In addition, several archaeological and geoarchaeological investigations have been undertaken in the vicinity, identifying the presence of Romano-British settlement and a complex series of Holocene sediments attributed to the Wentlooge Formation with significant palaeoenvironmental potential. The purpose of the deposit modelling was to provide additional base-line data with which to inform the design and implementation of any post-determination mitigation. The sub-surface litho-stratigraphy was analysed using sediments...