Land at Cargo Fleet – Site Investigation, Middlesbrough

Tender description

The Homes & Communities Agency intends the professional services of a competent and qualified ground investigation contractor to undertake an intrusive investigation of Plots A & B located in Cargo Fleet, Middlesbrough. Purpose of the Contract The purpose of the Contract is to obtain information on the ground and groundwater conditions of each Plot in order to assess potential geo-environmental and geotechnical constraints and abnormals associated with the potential redevelopment of each Plot. The intended scope of works for each Plot of land is detailed below: The ground investigation shall comprise a detailed geotechnical and geo-environmental investigation of the ground conditions at both sites. The investigation shall comprise the following: Plot A • 3No. cable percussive boreholes – comprising 3No. to rock head (anticipated to be approximately 20-25m bgl) or to a maximum depth of 30m bgl. • 1No. rotary follow-on, 10m core below rockhead, or to maximum depth of 40m bgl; • 3No. windowless sample boreholes to a target depth of 4m bgl. • 1No. machine excavated trial trench – comprising 1No. to 4m bgl and extending until the full extent of the infilled Ormesby Beck is determined i.e. full channel width and depth. • Combined ground gas and groundwater monitoring wells in all three boreholes. • Ground gas monitoring wells to be installed in 2No.selected windowless sample boreholes. • Geotechnical and chemical testing of selected samples. Plot B • 3No. cable percussive boreholes – comprising 3No. to rock head (anticipated to be approximately 20-25m bgl) or to a maximum depth of 30m bgl. • 1No. rotary follow-on, 10m core below rockhead, or to maximum depth of 40m bgl; • 9No. windowless sample boreholes to a target depth of 4m bgl. • Combined ground gas and groundwater monitoring wells in all three boreholes. • Ground gas monitoring wells to be installed in 5No.selected windowless sample boreholes. • Geotechnical and chemical testing of selected samples. In situ tests including Standard Penetration Tests and UT100 undisturbed samples and hand vane (HV) will be performed within the exploratory holes.