Once a pollution problem has been discovered, the first step is to conduct an investigation to characterize the hydrogeology of the site and to determine the nature, degree and extent of contamination. The findings of the investigation form the basis for an understanding of the severity of the current problem and a framework for estimation of future impacts using predictive tools, such as groundwater modeling.
Trinity has experience with virtually all US EPA approved soil and groundwater sampling techniques that are currently used to gather site data. These include logging and sampling of soil borings using a variety of drilling methods, direct-push/Geoprobe sampling, monitor well installation and sampling, geophysical data acquisition (both surface and down-hole applications), field screening of soils using photoionization or flame ionization detectors, test pit excavations, soil gas studies, aerial-photo interpretation, surface water sampling, aquifer performance testing, and groundwater sampling using micro-purge techniques.
Prior to beginning the field investigation, a sampling and analysis plan (SAP) may be prepared. The SAP defines the field sampling locations and laboratory analytical methods for the investigation. After completion of the field work and lab analyses, we employ the most current techniques of data evaluation and presentation including: statistics, groundwater modeling, computer-generated contour maps, graphs, relational databases, etc. Use of the latest software tools (i.e., Microsoft Excel, Access, MSWord, Wordperfect, AutoCAD, etc.) ensures that our reports look professional. More importantly, our reports are technically sound, well written, and well received by our clients and the regulatory community.
When post-closure groundwater monitoring is required, TRINITY will design a monitoring system and program to demonstrate compliance with remediation goals or regulatory requirements. Our experts have designed and implemented a number of monitoring programs using EPA approved sampling protocols and new technologies (i.e., micro-purging, dual-phase sampling, etc.).
In addition to design and management of monitoring programs, we also routinely perform groundwater monitoring activities for our clients. We own a variety of field test kits including meters to measure depth to water, depth/thickness of light non-aqueous phase liquids (LNAPLs), pH, specific conductivity, turbidity, oxidation/reduction potential, and dissolved oxygen. We also own field sampling tools (pumps, bailers, hand-augers, long-handled dippers, etc).