Technical experts

Pervinder Johal

Speciality: Microbiology & Virology
Location: Coventry, UK

Pervinder is a member of the Standing Committee of Analysts (SCA) Pervinder has worked at ALS for over 25 years and is widely recognised as an expert in Microbiology. Pervinder has been involved in the consultation and writing of several Blue Book methods and was instrumental in ALS becoming the first UK laboratory to UKAS and DWTS accredit MALDI-ToF confirmations.

Sam Dearlove

Speciality: MALDI-ToF Confirmations
Location: Coventry, UK

Sam was part of the original team that undertook the demonstration of method applicability for MALDI-ToF confirmations. Since then Sam has played a key role in ALS becoming the first UKAS and DWTS accredited MALDI-ToF confirmation laboratory. Sam has presented at numerous industry groups and has added a range of bacteria to our unique and market leading database of bacteria. Questions regarding new bacteria to isolate and detect using MALDI-ToF, including existing bacteria on our database, can be directed towards Sam.

John Quick, BSc (Hons)

Speciality: Organic Chemistry
Location: Coventry, UK

John is the principal scientist at ALS Environmental in Coventry. John’s background is in chromatography and over the last years John and his team has developed methods to analyse all the compounds included in the CIP program (A UK version of the Water Framework Directive) with detection levels not seen by any other commercial laboratory in the past. Questions concerning organic compounds and testing using chromatographic methods can be directed to John.

Bjorn Nielsen

Speciality: Microbiology
Location: Wakefield, UK

Bjorn is Principal Scientist, Microbiology for ALS Environmental UK.  He is a Chartered Biologist and member of the Royal Society of Biology and the Microbiology Society, and is a degree qualified microbiologist with over seventeen years of experience in water and food testing.

He is vice chair of the British Standards EH/3/4 - Microbiological Methods committee and a member of the Standing Committee of Analysts – Microbiological Methods working group. He has represented the UK as an active contributor to ISO standards development (including standards for Legionella, Pseudomonas aeruginosa, coliforms and Legionella PCR) and is the convenor of an ISO working group for re-drafting water microbiology standards. 

Leonard McComb

Speciality: Drinking Water Chemistry
Location: Wakefield, UK
Leonard is the Inorganic Chemistry Manager at ALS Environmental in Wakefield. He has 17 years’ experience of waters analysis having spent a varying amount of time either carrying out analysis or managing teams that do drinking water Organic, Inorganic and Micro biological testing. 

Sarup Chand

Speciality: Sampling Techniques
Location: Coventry, UK

Sarup is the lead sampler and Environmental Chemist at ALS Environmental. With over 20 years of environmental sampling experience he is more than capable of supporting any sampling activities from DWTS accredited Drinking Water samples through to Operator Self Monitoring MCERTS accredited waste water sampling.

Geraint Williams

Speciality: Investigation and assessment of land contamination
Location: Hawarden, UK

Geraint is an Associate at the ALS laboratory in Hawarden. He has over 20 years’ experience advising on a wide range of UK projects involving the investigation and assessment of sites under planning and Part 2A. He has previously worked across a range of disciplines including human health, controlled waters and ground gas risk assessment as well as assessing risk from vapour intrusion. He was a technical expert in UNEP’s environmental assessment of Ogoniland, Nigeria and has advised on similar projects in Eastern Europe, Middle East, Central Asia and South Africa. Geraint has a key interest in promoting best practice and serves on the Executive Committee of the Society of Brownfield Risk Assessment (SoBRA), the Association of Geotechnical and Geoenvironmental Specialists (AGS) and is a committee member of the Standards and Groundwater Vapour Risk Assessment subgroups.

Any questions related to the investigation of land contamination including advice on sampling and analytical strategies should be directed to Geraint.

Paul Gribble, BSc (Hons)

Speciality: Analytical Chemistry in environmental matrices
Location: Hawarden, UK

Paul is the Technical Director for the ALS laboratory in Hawarden. Over the last 25 years Paul has spent the majority of his time between developing new methods, looking at emerging legislation and solving challenges for clients.

Originally starting his career in the waste water industry, Paul has also been involved in the contaminated land sector for more than 15 years. Recently Paul was one of the major drivers of the method for poly and perfluorinated compounds (PFAS) and the so-called TOP assay and new methods for the Water Framework Directive.

Professor Clive Thompson, PhD

Speciality: Analytical Chemistry
Location: Rotherham, UK

Clive is Chief Scientist at ALS Life Sciences in Rotherham and a Visiting Professor at Brunel University of London. Clive is a well known expert in the Environmental and Water testing industry in the UK having spent a considerable amount of his time over the last 20 years providing solutions to clients analytical challenges.

He is a Fellow of the Royal Society of Chemistry; Fellow of the Chartered Institute of Water and Environmental Management; Fellow of the Institute of Food Science & Technology; Fellow of the Royal Institute of Public Health; Member of the Water Management Society and a Member of the Board of Trustees of the SCI, and a Board Member of the Fondation de la Maison de la Chemie.

He has published over 55 peer reviewed papers on a wide range of topics mainly relating to analysis and has a very wide range of contacts relating to food and water analysis. He serves on a number ISO/CEN committees relating to Water Quality; Soil Quality; Sludge Quality; Environmental Characterisation and Nanomaterials

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