Ground Water Monitoring and Remediation最新文献

{"title":"Society News","authors":"","doi":"10.1111/gwmr.12655","DOIUrl":"10.1111/gwmr.12655","url":null,"abstract":"","PeriodicalId":55081,"journal":{"name":"Ground Water Monitoring and Remediation","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140629535","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assimilative Capacity Is an Under-Utilized Concept for Regulating Soil and Groundwater Contamination with Important Implications for Site Closure","authors":"J.F. Devlin,&nbsp;Beth L. Parker,&nbsp;Andrea J.H. Rhoades,&nbsp;Robert J. Stuetzle,&nbsp;Shaily Mahendra,&nbsp;Joseph Scalia,&nbsp;Jens Blotevogel","doi":"10.1111/gwmr.12650","DOIUrl":"10.1111/gwmr.12650","url":null,"abstract":"<p>The beginning of modern in situ subsurface cleanup arguably began in the early 1970s with the application of hydrogen peroxide to shallow aquifers to drive gasoline spill remediation, in what became known as the Raymond method (Committee on In Situ Bioremediation <span>1993</span>). Since then, this idea has sparked remarkable remediation innovations where processes that occur naturally in the subsurface, including biodegradation, sorption, diffusion, abiotic reactions, and volatilization are enhanced by actions specifically designed to boost their role in lowering contaminant concentrations in groundwater.</p><p>By the 1990s, the age of “Natural Attenuation” (NA) was upon us, together with vigorous ethical and technical discussions aimed at understanding and explaining why the technology was not simply a euphemism for “do nothing.” Natural attenuation proponents held that natural processes tend to be protective of human and environmental health, are more cost- and resource effective than active remediation, and less risky by minimizing the aggressive movement of fluids in the subsurface. On the other hand, critics contended that NA amounted to a delay tactic aimed primarily at cost savings, with little or no risk reduction over reasonable time periods. Critically, since the end of the twentieth century, advancements in site characterization and monitoring tools have refined conceptual site models and established multiple lines of evidence that NA is associated with (1) well-constrained plume development and (2) diminished risk over space and time to an acceptable level without active remediation.</p><p>As NA gained acceptance, its adoption at sites became primarily dependent on evidence of biologically driven contaminant transformation as the primary attenuation mechanism. In the process, other important and effective processes, including the collective physical, geochemical, and hydrogeologic influences that can govern or complement contaminant mitigation were often overshadowed or completely overlooked. We know that chemical and physical mechanisms can play primary roles in reducing contaminant concentrations. This includes reactions with iron or manganese oxides, hydrolysis, sorption, diffusion, and dispersion, volatilization, and other mechanisms that lower a specified mass of contaminant, or contaminant mixture, in the subsurface. These processes can be influenced by, and feedback to, the biological activity in aquifers; the interconnectedness of biology, chemistry, and flow are better appreciated now than ever in the past. It is therefore intellectually, technologically, and economically wasteful to disregard any part of this compilation of processes when dealing with aquifer restoration. To improve site management and closure efforts, we need process-based conceptual site models that account for <i>all</i> the processes occurring in a groundwater system. Herein, we contend this can be realized by extending the current NA framework and ","PeriodicalId":55081,"journal":{"name":"Ground Water Monitoring and Remediation","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/gwmr.12650","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140576188","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multimethod Analysis of NSZD and Enhanced SZD by Solar-Powered Bioventing at the Guadalupe Restoration Project","authors":"Benjamin McAlexander,&nbsp;Eric J. Daniels,&nbsp;Natasha Sihota,&nbsp;Justin Eichert,&nbsp;Chris Smith","doi":"10.1111/gwmr.12647","DOIUrl":"10.1111/gwmr.12647","url":null,"abstract":"<p>Active remediation at sites with light non-aqueous phase liquid (LNAPL) often leaves residual hydrocarbons in the subsurface, necessitating long-term management. While much of the effort in recent years has focused on natural source zone depletion (NSZD) as the primary method for demonstrating continued hydrocarbon removal, the same data collection methods can quantify biodegradation enhancements that can sustainably increase the rate of SZD. This approach has been applied at the Guadalupe Restoration Project, one of the first sites at which NSZD measurements and monitoring technology were demonstrated. Sitewide NSZD quantification was conducted using CO₂ efflux measurements and subsurface temperature profiling. The results fell within the range of previously reported estimates that were based on soil-gas profiling in the early 2000s, demonstrating the viability of the new methods at this site. The data collection methods were then deployed during pilot testing of solar-powered bioventing. The system used seven 400-W solar panels to power a regenerative blower that delivered approximately 0.85 cubic meter per minute (30 cfm) air to the LNAPL-impacted vadose soil near the interface with the groundwater table. Soil-gas data indicated an upward fanning of injected air toward ground surface. Elevated temperature due to hydrocarbon oxidation yielded an approximate 10.2 kg day⁻¹ source depletion rate above the baseline NSZD mass removal rate over an approximate 30 m (100 ft) radius of influence, which aligned well with a 8.2 kg day⁻¹ rate estimated from CO₂ efflux measurements. Introduction of O₂ via bioventing substantially increased the LNAPL biodegradation rate from baseline NSZD processes by almost an order of magnitude. The results demonstrate that site management can proceed along a sequenced program that began with aggressive hydraulic recovery of hydrocarbon product, transitions to enhanced SZD in areas with poorly recoverable LNAPL, and then to NSZD without intervention to address residual LNAPL across the full footprint of the LNAPL bodies.</p>","PeriodicalId":55081,"journal":{"name":"Ground Water Monitoring and Remediation","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/gwmr.12647","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140576170","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Consideration of Vadose Zone Moisture Dynamics in Remediation of PFAS-Impacted Soils","authors":"Kayvan Karimi Askarani,&nbsp;John S. Cook,&nbsp;John A. Connor,&nbsp;Charles J. Newell","doi":"10.1111/gwmr.12646","DOIUrl":"10.1111/gwmr.12646","url":null,"abstract":"<p>Oilfield brines are soluble, non-volatile, and recalcitrant contaminants that are vulnerable to capillary effects and evapoconcentration and have been known to recontaminate clean fill soils emplaced after excavations. This problem may also occur for some poly- and perfluoroalkyl substances (PFAS) at PFAS sites. In this paper, we consider the soil moisture characteristic curve, wetting front dynamics, and the moisture redistribution cycle to understand the potential behavior of different PFAS in the vadose zone. Drawing on experience with remediation of soils impacted by brine spills, we provide recommendations on the design and implementation of soil excavation and cover remedies such as capillary barriers to prevent recontamination.</p>","PeriodicalId":55081,"journal":{"name":"Ground Water Monitoring and Remediation","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140576176","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"In My Experience: Observations on the Pace of Technology Advancement in the Remediation Industry","authors":"Craig Divine","doi":"10.1111/gwmr.12651","DOIUrl":"10.1111/gwmr.12651","url":null,"abstract":"","PeriodicalId":55081,"journal":{"name":"Ground Water Monitoring and Remediation","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140576175","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"High-Resolution Direct Push NMR Tools for Groundwater Investigations","authors":"Darya Morozov,&nbsp;David Walsh,&nbsp;Cristina McLaughlin,&nbsp;Anh Nguyen,&nbsp;Elliot Grunewald,&nbsp;Warren Caldwell,&nbsp;Daniel Pipp,&nbsp;Nicholas Basore,&nbsp;Thomas Christy and,&nbsp;Jorge Macedo","doi":"10.1111/gwmr.12645","DOIUrl":"10.1111/gwmr.12645","url":null,"abstract":"<p>A small-diameter nuclear magnetic resonance (NMR) technology optimized for use with direct push (DP) and cone penetrometer test (CPT) drilling has been developed. The DP NMR tool can be deployed through 2.25-in. diameter DP and CPT drilling rods allowing high-resolution NMR logging measurements to be acquired during retraction of drill rods. DP NMR technology runs from a person-portable battery-powered control unit and provides significantly higher resolution in both the spatial (vertical) dimension and in the time domain of the NMR measurement than previously available NMR technology. In this study, we summarize the development of two different DP NMR tools and demonstrate their application at different sites within the United States. We believe that this technology can provide a leap forward in adoption of NMR technology for high-resolution hydrological and geophysical investigations in groundwater resources and environmental remediation applications.</p>","PeriodicalId":55081,"journal":{"name":"Ground Water Monitoring and Remediation","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/gwmr.12645","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140603410","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bioremediation of Chlorate and Chromium in Soil Columns Using Contaminated Site Native Culture","authors":"Mehdi Motevasselin,&nbsp;Beata Gorczyca,&nbsp;Indra Kalinovich,&nbsp;Richard Sparling,&nbsp;Ramanathan Sri Ranjan","doi":"10.1111/gwmr.12643","DOIUrl":"10.1111/gwmr.12643","url":null,"abstract":"<p>Chlorate and hexavalent chromium (chromate) are both widely used in different industries, and the improper waste management in the past left many sites with elevated concentrations in groundwater that pose potential risk to human and/or ecological health. Bioremediation is a sustainable management solution that can reduce both of these contaminants to less toxic species. In our earlier microcosms experiments, we have demonstrated that native microorganisms collected from a site contaminated with chlorate and chromate can lower the concentration of these chemicals in groundwater to acceptable regulatory levels provided sufficient electron donor, nitrogen, and phosphorous are provided. In this study, continuous flow column experiments were performed using soil from the site impacted by both chlorate and chromate in the Province of Manitoba (Canada) and synthetic groundwater amended with acetate, nitrogen, and phosphorous. The objective was to evaluate at a bench scale possibility of in-situ groundwater treatment. Concentrations of chromate and chlorate measured in the columns' effluent water dropped by 86% and 96%, respectively. However, increased biomass and precipitation of trivalent chromium reduced the water flow rate in the columns, a concern for implementing this method as a long-term in-situ remediation solution.</p>","PeriodicalId":55081,"journal":{"name":"Ground Water Monitoring and Remediation","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/gwmr.12643","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140367179","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact of Hurricanes, Tropical Storms, and Coastal Extratropical Storms on Indoor Air VOC Concentrations","authors":"Chris Lutes,&nbsp;Victoria Boyd,&nbsp;Gwen Buckley,&nbsp;Laurent Levy,&nbsp;Kate Bronstein,&nbsp;John H. Zimmerman,&nbsp;Alan Williams,&nbsp;Brian Schumacher","doi":"10.1111/gwmr.12642","DOIUrl":"10.1111/gwmr.12642","url":null,"abstract":"<p>Understanding vapor intrusion (VI) temporal variability is key for the design of sampling strategies intended to assess reasonable maximum exposure of indoor air concentrations of volatile organic compounds (VOCs) as well as risk evaluation and mitigation planning. VI temporal variability has previously been shown to be dependent on the complex interactions of multiple independent variables—meteorological, hydrogeological, and human behavioral. Several meteorological variables, including barometric pressure, wind speed, and rainfall, are linked during tropical and extratropical storm events. High-frequency meteorological and indoor VOC data from a series of seven tropical storms and four extratropical storms were collected at a single industrial building with multiple heating, ventilation, and air conditioning (HVAC) zones. The storms and sampling zones showed a variety of effects on trichloroethylene (TCE) concentrations in indoor air. In one zone (supply room), increases in TCE concentrations often, but not always, closely coincided with decreasing barometric pressure, sustained wind speeds over 32 km/h (20 mph), and differential pressures indicating subslab to indoor flow. A second zone, in a restroom, did not show a consistent pattern of temporal correlation between meteorological factors and indoor air concentrations. While peak indoor air concentrations may be associated with the passage of cyclonic storms at some sampling locations, this does not appear to be generalizable to all sampling locations. The observed increase in indoor air concentration potentially attributable to these storms is typically less than an order of magnitude and the duration ranges from a day to a week.</p>","PeriodicalId":55081,"journal":{"name":"Ground Water Monitoring and Remediation","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140369197","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"UAV Thermal Mapping as a New Tool to Detect Subsurface Moisture and Document Baseline Environmental Conditions","authors":"William R. Laton,&nbsp;Rene A. Perez,&nbsp;John H. Foster","doi":"10.1111/gwmr.12644","DOIUrl":"10.1111/gwmr.12644","url":null,"abstract":"<p>The California High-Speed Rail is currently planning a rail corridor through the San Gabriel Mountains. The alignment will require tunnels up to approximately 600 m deep and crossing through the San Gabriel Mountains in the SR 14 area. This study utilized repeated optical and infrared unmanned aerial vehicle (UAV) aerial imagery to document the baseline environmental conditions overlying one of the future high-speed rail tunnels. Images provide vegetation and soil moisture patterns along the surface route of the corridor for future comparison when the tunneling segments are bored. Analysis of reflectance data revealed subsurface water flow in the Bear Creek-Sand Canyon Creek Study Area. Using UAVs is considered an effective new tool to detect large-scale and discrete environmental conditions, perhaps undocumented or unobservable, via standard mapping tools. Setting detailed baseline conditions is important to identify changes that may occur because of future tunneling.</p>","PeriodicalId":55081,"journal":{"name":"Ground Water Monitoring and Remediation","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140199592","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Groundwater Federal Regulatory Summary for 2023","authors":"Charles Job","doi":"10.1111/gwmr.12641","DOIUrl":"10.1111/gwmr.12641","url":null,"abstract":"","PeriodicalId":55081,"journal":{"name":"Ground Water Monitoring and Remediation","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140033609","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}