Background
Our client, an insurance company, was involved in post-flood rectification and remediation works to a domestic dwelling in East London. The property had suffered ingress of water and sewage due to nearby flooding and there were concerns over potential risks to occupant health on reoccupation from mould, fungi and pathogenic bacteria. First Environment was called in to investigate, collect swab and air samples, and report.
Scope
To attend site, evaluate the area concerned, devise a sample strategy for surface and airborne microorganisms, take measurements for humidity, moisture and other general readings, and produce a detailed factual report.
Core tasks
- Inspection of the affected area
- Identification of areas affected by damp and water ingress, and where rectification works had been undertaken
- Sampling by swab and contact plate for surface microorganisms
- Sampling of airborne bacteria, yeasts and moulds
- Bacterial examination for coliforms, Escherichia coli, enterococci and similar
- Mycological examination for Aspergillus, Penicillium, Cladosporium, Chaetomium and similar
- Review of results and findings
Outcome
The initial site visit and microbial tests established the status of the premises with regard to the progress of the remediation works. Initial findings showed some remaining bacterial issues and areas of moisture requiring some further, but not extensive, remediation. A follow-up visit was undertaken on completion of these works by the insurer’s contractor and the property was shown to be restored to a safe and satisfactory standard for reoccupation. The independent nature of the works and report meant it was accepted for reassurance purposes by both the insurer and the occupier.
Summary
Drawing on experience of similar investigations, First Environment was able to attend site, identify affected areas and quantify the levels and types of airborne and surface microorganisms. Factual and clear recommendations enabled further targeted remediation to restore the premises to a safe level for reoccupation.