The isotopic ratio is initially determined by the natural material of origin and the manufacturing process, but then altered through degradation processes. CSIA can be used to measure degradation of a compound because the isotopic ratio changes as the compound is degraded.

Using Compound Specific Isotope Analysis (CSIA) in Groundwater Assessment – C06-016 This course is adapted from USEPA publication Named – “A Guide for Assessing Biodegradation and Source Identification of Organic Ground Water Contaminants using Compound Specific Isotope Analysis (CSIA)” - EPA 600/R -08/148, which is in the public domain.

Sep 14, 2004 · A presentation at EPA region 3 corrective action workshop on the pros and cons of LNAPL, NAPL and DNAPL strategies in CA management. Keywords: release source, aquifer, porosity, saturation, capillary pressure, fluid property, data, soil type

Oct 1, 2020 · In the last two decades, the technique of compound-specific stable isotope analysis (CSIA) has become a well-established method to quantitatively assess the biodegradation of contaminants such as aromatic hydrocarbons in groundwater (Vogt et al., 2016).

Light Non-Aqueous Phase Liquids (LNAPL) Literature Review Version 1.0, Western States Petroleum Association, Torrance, California. Best available treatment technology. BATT is a term used here for groundwater cleanup technologies that is similar to the concept of Best Available Technology (BAT).

Light Non-Aqueous Phase Liquid (LNAPL) Management is the process of LNAPL site assessment, monitoring, LNAPL Conceptual Site Model development, identification and validation of relevant LNAPL concerns, and the possible application of remediation technologies. The presence of LNAPL can create challenges at any site.

Dec 1, 2022 · We have established methods for pre-treatment and GC/CSIA analysis methods of target volatile PFAS in soil and air samples and ensured the accuracy of carbon isotope analysis.

LNAPL transmissivity depends on soil type, LNAPL type, LNAPL saturation, and thickness of mobile LNAPL. Since LNAPL transmissivity is related to all key variables (see above) that can affect recoverability, it is a better metric than the conventionally used metric of in …

LNAPL occurrence Direct ASTM D 95 Dean Stark Low-Flow sampling Indirect ASTM D6771-02 EPA, 1996. EPA/540/S-95/504 Low-flow (minimal drawdown) ... (CSIA) Indirect ASTM D5739-95 Syringe sampling Indirect ASTM D7663-12 EPA/510/B-97/001 Discrete-interval sampling tools (vertical characterization)

Apr 10, 2025 · Compound-specific isotope analysis (CSIA) evaluation of degradation of chlorinated benzenes (CBs) and benzene in a contaminated aquifer. J. Contam. ... Numerical simulations and long-column tests of LNAPL displacement and trapping by a fluctuating water table. J. Soil Contam., 7 (1998), pp. 325-356. Crossref View in Scopus Google Scholar.