Kleinfelder Inc. utilized SoilVision software program SVFlux 3D to evaluate sections of levee located in Northern California. The existing levee section contained numerous features including a landside irrigation ditch, and pumping plant sump at the landside toe of the levee, a highway embankment intersecting the levee, and/or existing pipes extending through the levee embankment. Due to the importance of these features, continuous construction of a slurry cutoff wall was not feasible to mitigate potential underseepage and through seepage. Therefore, small windows in the slurry cutoff wall were proposed to be left open during construction to allow continuous use of these facilities. Seepage analysis at these locations was performed to evaluate the three dimensional effects including end effects of seepage through these proposed cutoff wall windows. SVFlux 3D provided a platform capable of analyzing the difficult features present at this project location. Another three-dimensional seepage modeling program was previously used for this project and results calculated with SVFlux 3D confirmed those previous results. The SVFlux modeling program is a great tool to evaluate difficult situations involving levee geometry, topographical features, existing construction, and proposed construction. Kleinfelder would recommend this program to other consultants who may need additional tools to understand seepage conditions which may affect project design and construction.
Monitoring hydrocarbons in Bilge water - Case study
The Situation Various processes onboard ships, such as machinery wash-down, maintenance, and leakage, generate oily wastewater. This contaminated water flow collects in the bilge of the ship. Marine diesel, lubricating oils, grease, as well as other contaminants may be present in bilge water. The bilge water is discharged overboard, with oil and grease concentrations in the discharged water limited by national and international regulations.In the United States territorial waters, the U.S. Coast Guard (USCG)...
TOC analyzer for airports
During winter, de-icing processes at airports necessitate storm water and de-icing water management. Especially due to adhesive (sticky) substances, strongly fluctuating concentrations and a lot of chemicals, the monitoring systems itself must be tailor-made to fight this water analysis challenge. LAR `s QuickTOCairport is an application-specific online total organic carbon (TOC) analyzer that meets these tough requirements. The sample is injected via a robot-driven injection system to the oven – without...
Case study : VOC analysis in ambient air by FID dectection - Complete system airmOzone
Ozone concentration has been multiplied by 5 in the last century in the middle latitudes of the northern hemisphere from 10 PPB in 1874 to approximately 50 PPB today. This is an increase of 1.6% per year; the trend is probably higher (2.4% a year) over the last decades. (Chapter 1 of the International Geosphere-Biosphere Program - World Climate Research Program) In order to stop this global trend, directives have been written concerning the reduction of ozone precursors emissions (NOx and VOC) to define national...
How to investigate mercury in the oceans?
Mercury is a highly toxic metal that affects the environment and can endanger people`s health, as a powerful neurotoxin. The combustion of coal, waste and fuel are releasing hundreds of tons of heavy metal into the atmosphere annually, and its sediment enters to soil and water. Mercury measurements are part of the EU project "Global Mercury Observation System". The long-term goal of this project is to create a global system for monitoring of mercury and its compounds. In the process of achieving this goal are...
Analyzer underpins growth of container inspection company
After a career as a customs officer in the Netherlands, Wim van Tienen was well aware of the toxic gas hazards presented by some freight containers, so in 2009 he started a company, Van Tienen Milieuadvies B.V., offering gas analysis and safety advice. The company grew quickly and now employs 23 staff. Wim attributes a large part of this success to the advanced FTIR gas detection and analysis technology upon which the company’s services depend. Background It has been estimated that there are more than 17...