AYLESFORD SITE MONITORING

Peter Baxter Associates Ltd were engaged to monitor boreholes installed by others at a disused scrap yard in Aylesford, Kent. The site was monitored weekly for VOCs, methane, hydrogen sulphide, oxygen and carbon dioxide.

The site was visited on a weekly basis at different atmospheric pressures to ascertain whether any gas prevention measures would be required for a new housing development. An FID gas analyser was used to identify whether VOC gases were present and a gas analyser for identifying landfill gases.

COST EFFECTIVE SOLUTIONS

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.

NOTES FROM A SMALL ISLAND

Peter Baxter Associates are in their third year of site monitoring of a former dredging deposition site at Hoo Island, situated in the Medway Estuary, Kent. Water samples are recovered, tested and reported in accordance with EA guidelines on a quarterly basis to allow the site owner, Peel Ports Ltd to comply with their environmental permit. We are also conducting monthly borehole monitoring to inform the Client’s site closure plan.

PBA’s proximity to the site is reflected in our competitive rates for site monitoring and our flexible operation.

Peter Baxter Associates have over 15 years experience of Water Monitoring and used an innovative system for monitoring at Hoo Island. This site was particularly complex due to high levels of silt from dredging deposits. Peter Baxter selected the Hydrasleeve method which targets a particular monitoring depth where standard monitoring systems, such as a peristaltic pump, are not possible due to low recharge volumes and high silt levels in wells.

The system was approved by the Environment Agency as an alternative method to enable monthly monitoring within the site Boreholes.

Hydrasleeve Water Sampling

TWO FOR ONE

‘Petworth’ Biggin Hill. Peter Baxter Associates provide geotechnical design advice to projects of all sizes in Kent and elsewhere. ‘Petworth’, Biggin Hill illustrates the many smaller redevelopment projects that we assist with. An existing bungalow was replaced by two new semi-detached properties.

PBA issued the site investigation report including bearing capacity and tree effects, within 15 working days of being engaged.

BORED BOOKIES

Drilling a hole in the floor of a bookmakers! Peter Baxter Associates used a handheld hydraulic hammer to obtain a 4m windowless sample inside a Victorian building for this retail to residential development incorporating a basement.

A standpipe was installed to allow site monitoring of groundwater in the London Clay strata.

GOTHIC REVIVAL

Peter Baxter Associates were commissioned to carry out a geotechnical and environmental site investigation for a proposed new visitor’s centre at Margate Caves, Kent. The site was uneven and heavily overgrown. The access restrictions and uncertainty over the strength of the historic chalk caves was resolved by using a lightweight tracked sampler rig drilling to 5m depth.

PBA interpreted the complex geology of the site and recommended geotechnical design solutions for the foundations of the proposed portal frame structure.

Z CARS TO GRAND DESIGNS

A 1960’s former police station at Northfleet, Kent, was investigated by Peter Baxter Associates. The site investigation comprised a 10m deep borehole, trial pits, in situ strength testing and in situ soakaway testing.

On completion of the works an environmental desk study and intrusive site investigation were carried out.

An interpretive report containing the geotechnical design of foundations and recommendations for ongoing site testing was completed, all for a very competitive price.