Soil Type Composition No. of trial Depths found/ Additional holes m bgl Information encountered in Topsoil Soft dark clayey 9 out of 18 0.10-0.30 n/a sandy Silt with fine rootlets Made Very soft to soft 18 out of 18 0.30-5.00 No visual or Ground dark grey brown olfactory sandy clayey contamination gravelly silt. indicators Gravel was fine to medium angular brick fragments. Wittering Thinly 12 out of 18 6.40-12.90 Immediately Formation interbedded underlying the clayey medium Topsoil or sands and sandy Made Ground silty clays. The sands were occasionally ferruginous stained. London Grey stiff silty 5 out of 18 Present to the Immediately Clay sandy Clay with maximum underlying the Formation occasional of the of the pockets of clayey investigation, Wittering sand. 20.00m bgl Formation were also encountered in each of the eighteen trial holes at varying depths. The Phase I Desk Study undertaken by Soils Limited (report ref: 15048/DS dated June 2015) for the area known as Orchard Lodge identified a medium to high risk of ground contamination from an onsite fuel oil spill in 1997, Made Ground from the historical redevelopment and the presence of a historical landfill. Furthermore, the Phase I Desk Study identified a high risk of soil gas associated with the former landfill onsite, and a medium risk associated with an onsite fuel oil spill. Areas of ground which have reportedly struggled to sustain plant life since the land filling during the 80’s were highlighted by concerned local residents and subsequently targeted by machine excavated trial pits. The Phase II Ground Investigation’s did not identify any additional potential sources of contamination and therefore the preliminary Conceptual Site Model’s did not require revision. The Investigation into the area of historic landfilling revealed soft Made Ground to depths of up to 5m. The soils were found to comprise largely natural clay rich soil with clasts of organic rich layers, ash and charcoal, tree stumps, wooden fence posts and brick/concrete inclusions, however the vast majority of the fill was natural clay which appeared to be reworked Wittering Formation. In one location an old topsoil
Soil Type Composition No. of trial holes encountered in Depths found/ m bgl Additional Information Topsoil Soft dark clayey sandy Silt with fine rootlets 9 out of 18 0.10-0.30 n/a Made Ground Very soft to soft dark grey brown sandy clayey gravelly silt. Gravel was fine to medium angular brick fragments. 18 out of 18 0.30-5.00 No visual or olfactory contamination indicators Wittering Formation Thinly interbedded clayey medium sands and sandy silty clays. The sands were occasionally ferruginous stained. 12 out of 18 6.40-12.90 Immediately underlying the Topsoil or Made Ground London Clay Formation Grey stiff silty sandy Clay with occasional pockets of clayey sand. 5 out of 18 Present to the maximum of the investigation, 20.00m bgl Immediately underlying the of the Wittering Formation were also encountered in each of the eighteen trial holes at varying depths. The Phase I Desk Study undertaken by Soils Limited (report ref: 15048/DS dated June 2015) for the area known as Orchard Lodge identified a medium to high risk of ground contamination from an onsite fuel oil spill in 1997, Made Ground from the historical redevelopment and the presence of a historical landfill. Furthermore, the Phase I Desk Study identified a high risk of soil gas associated with the former landfill onsite, and a medium risk associated with an onsite fuel oil spill. Areas of ground which have reportedly struggled to sustain plant life since the land filling during the 80’s were highlighted by concerned local residents and subsequently targeted by machine excavated trial pits. The Phase II Ground Investigation’s did not identify any additional potential sources of contamination and therefore the preliminary Conceptual Site Model’s did not require revision. The Investigation into the area of historic landfilling revealed soft Made Ground to depths of up to 5m. The soils were found to comprise largely natural clay rich soil with clasts of organic rich layers, ash and charcoal, tree stumps, wooden fence posts and brick/concrete inclusions, however the vast majority of the fill was natural clay which appeared to be reworked Wittering Formation. In one location an old topsoil