Contact Us

HBR Head Office
7 Appleton Court, Calder Park,
Wakefield, WF2 7AR

Telephone: 01924 250 132

Fax: 01924 251 394


Blackwell Southern Regional Office

Coggeshall Road, Earls Colne
Essex, CO6 2JX

Telephone: 01787 222768

Fax: 01787 224391

Blackwell Midlands and South West Regional Office
4 Bredon Court, Brockeridge Park,
Twyning, Gloucestershire
GL20 6FF

Telephone: 0844 482 9685

Blackwell Scottish Regional Office
Broken Cross,
Douglas Water,
ML11 9PB

Telephone: 01324 483713

HBR Certificates

In Situ Project Nears Completion Ahead of Time

HBR Ltd has recently submitted final validation data for an in-situ remediation project incorporating Dual Phase Extraction, Soil Vapour Extraction and Air Sparging techniques at a former petrol service station in the West Midlands.

The original works programme provided for 18 months of full-scale remediation works to reduce the highly contaminated source area (Free-phase product and unsaturated soils) and dissolved phase plume to below Site Specific Action Criteria (SSAC’s). 

However, reduction of the full suite of contaminants, most notably Polycyclic Aromatic Hydrocarbons (PAH’s) and recalcitrant high-end aromatic compounds has been achieved at all monitoring locations across the site some 6 months ahead of schedule.

This rapid response to full-scale treatment works should be seen as clear affirmation of the value of incorporating on-site design works into project budgets and programme. This up-front design stage is especially true of in-situ approaches which rely heavily on accurate sub-surface characterisation.  Initial HBR pilot-scale and in-situ biodegradation study work at the site was completed by the design team and allowed a complete re-evaluation of key design parameters to maximise efficiencies of the full-scale system.

Once commissioned, on-going monitoring of process data both remotely (via a comprehensive telemetry control system) and during regular visits served not only as environmental control data but allowed the remediation team to react to sub-surface responses at each treatment well over time.  Contaminant recoveries (i.e. LNAPL skimmer pump settings, vacuum pressures and localised VOC concentrations) could then be maximised.


The site will now be independently validated by the Client’s representative, prior to equipment demobilisation and sign-off by the Regulator.  The site will then be available for residential development.