Peter Baxter Associates conducted a combined geotechnical and environmental site investigation for a low rise block of social housing flats in Rochester, Kent. The Phase 1 desk study indicated that a small historic landfill was less than 100m from the site, giving moderate risk of the migration of landfill gases. To assess this risk, two gas monitoring installations were installed in windowless sampler holes during the geotechnical investigation.

Site monitoring of the boreholes for landfill gases was carried out by PBA. None were detected. The proximity of the site allowed PBA to quote very competitive visit rates.