Analysis and Testing

Can you test for lead and/or mercury in paint?
Yes. Analysis is typically conducted on a paint chip sample.   Typically a couple of stamp sized pieces or a minimum of 1 gram is sufficient, submit...
Fri, 1 Apr, 2022 at 10:23 AM
Difference between Nitrates and Nitrites reported as N under “Nutrients” and NO3/NO2 under “Calculated parameters”:
The difference comes from the fact that dissolved nitrate is expressed in mg/L (as N), and the calculated value is converting the results to mg/L (NO3). ...
Mon, 4 Apr, 2022 at 9:34 AM
Bunker C, Fuel Oil #6
Bunker C oil, also know as Fuel Oil # 6 falls into the C12-C32 carbon chain length group of fuels.  It contains a variety of impurities including PAHs (Poly...
Mon, 4 Apr, 2022 at 2:45 PM
How Total benzo(a)pyrene equivalents are calculated. Which parameters are used and how are NDs accounted for?
Total benzo(a)pyrene equivalents calculated by multiplying the water concentration of individual carcinogenic PAH’s by a standardized Benzo(a)pyrene Equival...
Wed, 7 Nov, 2018 at 10:42 AM
Oil and Grease. Difference between Gravimetric and Infrared
OG Gravimetric Total Oil and Grease (OGH) is a gravimetric analysis of oil and grease in water samples through extraction with hexane. It is applicable to ...
Fri, 1 Apr, 2022 at 10:36 AM
What is the difference between F4 Gravimetric (F4G) and Mineral Oil and Grease?
In most ways, these two analyses are very similar: both are gravimetric analyses, targeting hexane-extractable, semi-volatile hydrocarbons including any comp...
Mon, 4 Feb, 2019 at 10:26 AM
Total Oxidizable Precursors - TOP
Precursors = compounds that may convert to polyfluorinated alkyl substances (PFAS), in situ.  These compounds either already exist in the environment as con...
Thu, 28 Mar, 2019 at 10:35 AM
What is the difference between TCLP, SPLP and ZHE?
TCLP (Toxicity Characteristic Leachate Procedure) and SPLP (Synthetic Precipitate Leachate Procedure) are used to assess the leachability of semi-volatile o...
Fri, 21 Dec, 2018 at 9:36 AM
What is the difference between total and dissolved metals?
Depending on the sample preparation or sampling procedure, contaminants in water can be measured as “total”, “dissolved”, “mobile” or “suspended”. Samples c...
Tue, 7 May, 2019 at 1:59 PM
What is the difference between the different methods for PCB analysis?
Generally, Polychlorinated Biphenyls (PCBs) are regulated and reported as either a total value or as a number of individual Aroclors.  However there may be ...
Fri, 18 Jan, 2019 at 2:00 PM