Gasoline additives, or oxygenates, are a concern in the environment as they have been found to have contaminated groundwater through leaking underground gasoline storage tanks (USTs).  ARI is now testing for an a number of oxygenates, including MTBE, TAME, ETBE, Diisopropyl Ether and tert-Butanol, using volatile GC/MS Method SW8260B.  Please contact us to for more information regarding reporting limits and other analytical details.

Increased public concern with the bioaccumulative affects of Mercury and advances in technology are driving regulatory levels to lower requirements.  ARI has validated a modification to the CVAA method to report mercury at 20 parts-per-trillion.

Lower Reporting Limits for TPHG/BETX

Dissolved gases are often used as indicators of the biodegradation process under anoxic conditions.  ARI purchased new instrumentation and validated the RSK-175 method, allowing us to offer RSK-175 with ARI quality and turn-around time.

While there is increasing concern for monitoring compounds at lower concentrations in water, sediment samples with low TOC values or high contaminant levels often make it difficult to meet screening levels.  ARI has validated a SIM method for the 'problematic' semivolatiles at approximately 0.1 ug/L levels for waters and 6.7ug/kg for soils/sediments. Solid samples require screening prior to extraction and both matrices require concurrent analysis by full-scan GC/MS.  PAH only can be analyzed at 0.01 ug/L in clean waters.

Regulatory limits are currently expressed as Aroclors, but factors may dictate that a site be evaluated based on the results of PCB congener analysis.  The cost of HR-GC/MS analysis may be prohibitively high and may be inappropriate for initial investigations.  As an alternative, ARI will offers Congener analysis using GC/ECD-8082 method.

Mercury, PCBs, Chlordane, Dioxin or DDT have been the primary constituents responsible for fish consumption advisories in the past.  Additional chemicals have the potential to cause adverse effects after release to surface waters due to bioaccumulation in aquatic organisms.  In response, agencies are increasing efforts to monitor fish and shellfish contamination and to identify the cause and source of the contamination.  ARI has years of experience analyzing Tissues for Butyl Tins, Aroclor PCBs, Chlorinated pesticides, Semivolatile Organics, Pentachlorophenol, metals, Mercury and lipids.  New for 2006 are method specific clean-ups to reduce interferences from the matrices and addition of a large capacity grinder for homogenizing larger organisms.  Please call us if you have questions or would like a cost quote.  For pricing you may also visit our Price List.