Environmental Chemistry

CLS performs an extensive range of environmental sampling followed by chemical and microbiological analysis in our INAB accredited testing laboratory Reg. No. 108T. We deliver a professional service in all aspects of environmental monitoring from IPPC, Waste and Discharge license requirements to air & noise assessments. We monitor in compliance with regulatory requirements at landfill and waste facilities and treatment plants. CLS performs flow & load surveys and has extensive knowledge and experience in sampling from surface water, groundwater and drinking water sources. CLS’s state of the art laboratories are fully equipped with all necessary infra-structure to store, handle and analyse large numbers of samples.

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Our Clients

  • Government Agencies, Local Authorities
  • License Holders (IPPC, Waste, Discharge) For more information click here
  • Environmental Consultants
  • Industry / Engineering Companies
  • Group Water Schemes

Sampling & Monitoring Services

CLS’s experienced sampling personnel are strategically positioned to carry out large scale in situ analysis and recovery of samples for laboratory analysis all over Ireland. All sampling and analysis follows written procedures and is undertaken in accordance with the requirements of our Quality Management System based on ISO 17025 and ISO 9001. As an EPA approved laboratory we offer minimum sample holding times. Our technical staff offers individual sampling programmes designed to meet customer’s requirements.

Specialist sampling areas:

  • Flow & Load Surveys, Composite Sampling
  • Sludge
  • Lake (Water & Sediment), River
  • Boreholes & Wells
  • Leachates
  • Raw and Treated Waters
  • Drinking water
  • Compliance Monitoring
  • Environmental Baseline Studies
  • Validation and Commissioning
  • Noise / Vibration monitoring
  • Dust Monitoring


Quality approved analysis using state of the art technology includes

  • Major Cations & Anions
  • Heavy metals by ICP-MS
  • Nutrients, Minerals, Chloride, Sulphate, Hardness
  • Wet chemistry parameters
  • Oils, Fats & Greases, TSS, TDS
  • TOC, COD, BOD, Nitrogen, Phosphate, Ammonia
  • pH, Dissolved Oxygen, Conductivity, Turbidity, Colour
  • PAH 16
  • Alkalinity, Langelier Index Microscopic sludge analysis
  • Total Petroleum Hydrocarbons (TPH) by GC
  • PRO, BTEX, Extractable Hydrocarbons (DRO) by GCFID
  • Mineral oil
  • USEPA Phenols by HPLC
  • Dust & Noise monitoring
  • Sludge analysis
  • Dangerous substances and trace organics
  • PCB, VOCs and Pesticide analysis available

PAH Table – May 2013

Polycyclic Aromatic Hydrocarbons (PAH) by HPLC

Compound LOQ* Drinking Waters LOQ Surface Waters
Acenaphthylene 50 ng/l 50 ng/l
Anthracene 10 ng/l 10 ng/l
Benzo(a)anthracene 10 ng/l 10 ng/l
Naphthalene 50 ng/l 50 ng/l
Acenaphthene 10 ng/l 50 ng/l
Fluorene 10 ng/l 10 ng/l
Phenanthrene 10 ng/l 50 ng/l
Fluoranthene 10 ng/l 10 ng/l
Pyrene 50 ng/l 50 ng/l
Chrysene 10 ng/l 10 ng/l
Benzo(b)fluoranthene 10 ng/l 10 ng/l
Benzo(k)fluoranthene 10 ng/l 10 ng/l
Benzo(a)pyrene 5 ng/l 10 ng/l
Dibenzo(a,h)anthracene 10 ng/l 10 ng/l
Benzo(g,h,i)perylene 10 ng/l 10 ng/l
Indeno(1,2,3-cd)pyrene 10 ng/l 10 ng/l
Total PAH 4, 6, 10 or 16


PRO Table – May 2013

Volatile Hydrocarbons in Water by HS-GC/FID

Compound LOQ (Drinking, Surface, Ground, Sea and Waste water)
t-Butyl Methyl Ether (MTBE) 10 ug/L
Benzene 10 ug/L
Toluene 10 ug/L
Ethylbenzene 10 ug/L
m/p-Xylene 20 ug/L
o-Xylene 10 ug/L
Petrol Range Organics** (PRO) nC5-nC8 10 ug/L
**Also know as Gasoline Range Organics (GRO)

DRO Table – May 2013

Parameter Units LOQ
Extractable Hydrocarbons (DRO) by GC/FID*
DRO (n-C8 ton-C40) total & dissolved ug/l 100
Dissolved Phase DRO (n-C8 ton-C40) ug/l 10
Mineral Oil by calculation ug/l 10
*Drinking Water, Surface Water, Effluent, Sea Water and Groundwater

Quality Systems

At CLS we are committed to ensuring the integrity and quality of results and services without compromise.We use the most up to date processes and procedures in our INAB accredited testing laboratory Reg. No. 108T. CLS operates within a robust and extensive quality management system which is regularly audited through an extensive audit programme. Our teams are fully qualified professionals operating a rigorous proficiency testing policy to further monitor our performance.


The analytical services are supported by the CLS Laboratory Information Management System (LIMS). This is a bespoke system for enterprise-wide tracking of laboratory samples, calculation of test results, production of reports and trending of data. Customers can trend and access their results securely via the CLS website, facilitating release of results at the earliest opportunity.

In addition to this, reports can be provided in electronic and/or hard copy format. Customised reporting and highlighting of out of specification results are also available.

Furthermore CLS is the first Irish laboratory to provide EDEN compatible reporting formats in support of Local Authorities and Government Agencies.

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