Ground Water Monitoring and Remediation最新文献

{"title":"Society News","authors":"","doi":"10.1111/gwmr.12690","DOIUrl":"10.1111/gwmr.12690","url":null,"abstract":"","PeriodicalId":55081,"journal":{"name":"Ground Water Monitoring and Remediation","volume":"44 4","pages":"9-10"},"PeriodicalIF":1.3,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142596207","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: Life Is Too Short to Waste on Old Problems When Solutions Are Readily at Hand","authors":"Andrew McCue","doi":"10.1111/gwmr.12688","DOIUrl":"10.1111/gwmr.12688","url":null,"abstract":"","PeriodicalId":55081,"journal":{"name":"Ground Water Monitoring and Remediation","volume":"44 4","pages":"111-113"},"PeriodicalIF":1.3,"publicationDate":"2024-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142596347","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":"Correction to “Safe Drinking Water Act 50th Anniversary—Recognizing an Evolving Path of Groundwater Management and Protection”","authors":"","doi":"10.1111/gwmr.12687","DOIUrl":"10.1111/gwmr.12687","url":null,"abstract":"<p>Job, C. 2024. Safe drinking water act 50th anniversary—Recognizing an evolving path of groundwater management and protection. <i>Groundwater Monitoring &amp; Remediation</i> 44: 22–27. https://doi.org/10.1111/gwmr.12671</p><p>The below noted “Conflict of Interest” section has been removed from this article after the issue publication. There is no conflict of interest with the material presented in this article.</p><p>The author does have a conflict of interest in the material presented in this article and is not endorsing any materials or products referred to in it.</p><p>We apologize for this error.</p>","PeriodicalId":55081,"journal":{"name":"Ground Water Monitoring and Remediation","volume":"44 4","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/gwmr.12687","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142596344","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":"Responding to EPA's PFAS Strategic Roadmap","authors":"Charles Job","doi":"10.1111/gwmr.12686","DOIUrl":"10.1111/gwmr.12686","url":null,"abstract":"","PeriodicalId":55081,"journal":{"name":"Ground Water Monitoring and Remediation","volume":"44 4","pages":"21-26"},"PeriodicalIF":1.3,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142195398","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":"Assessment of the Hydraulic Profiling Tool for Lower Permeability Characterization","authors":"Gaisheng Liu,&nbsp;Steven Knobbe","doi":"10.1111/gwmr.12685","DOIUrl":"10.1111/gwmr.12685","url":null,"abstract":"<p>The Hydraulic Profiling Tool (HPT) has become one of the most widely accepted approaches for obtaining vertical profiles of hydraulic conductivity (K) in environmental site investigations. The current tool, however, is limited to use in moderately permeable settings with a measurable K range of 0.03 to 25 m/d. In this work, we added a low-flow injection system to standard HPT and modified the field profiling procedure so that it could be used more effectively in lower-K settings. The modified lower-K HPT was tested and evaluated against direct-push slug tests at a field site in the Kansas River floodplain. Results indicated that when the injection rate was reduced, injection pressure decreased, which reduced the potential of injection-induced formation alteration. A particular challenge of applying HPT in lower-K zones is the large pressure generated by probe advancement; this can significantly affect the pressure signal measured at the injection screen. Our results showed that the impacts of advancement-generated pressure could be mitigated by reducing the speed of probe advancement. Compared to K estimates by slug tests, the vertical variability in HPT K was much lower. The reduced variability in HPT K was likely due to formation alteration during probe advancement, as well as pressure interference from injections at previous depths and probe advancement at the bottom. Additional work, such as the use of a smaller-diameter probe, is needed to further improve the performance of HPT in lower permeability zones.</p>","PeriodicalId":55081,"journal":{"name":"Ground Water Monitoring and Remediation","volume":"45 1","pages":"88-97"},"PeriodicalIF":1.3,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142225049","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":"A New Look at Diffusion in Vapor Intrusion Assessments; Passive Adsorptive Diffusion Samplers","authors":"Michael Niemet,&nbsp;Ben Thompson,&nbsp;Katie Rabe,&nbsp;Harry O'Neill","doi":"10.1111/gwmr.12683","DOIUrl":"10.1111/gwmr.12683","url":null,"abstract":"<p>Vapor intrusion of toxic volatile organic compounds (VOCs) from subsurface soil vapor, through a building slab/floor, and into the indoor air is an important environmental contaminant transport mechanism. It is widely believed that advective flow, driven by the pressure differential between the subslab and indoor air, is the primary mechanism of subslab soil vapor entry into buildings. This paper explores the hypothesis that molecular diffusion through the slab may potentially play a larger role in vapor intrusion than previously believed and may even be the predominant vapor intrusion mechanism when the subslab vapor source strength is sufficiently high or the pressure differential is relatively low. A novel sampling device, referred to as a Passive Adsorptive Diffusion Sampler (PADS), is presented for the purpose of directly measuring the diffusion of VOCs through a building slab. A vacant warehouse was identified as a case study site where historical sampling had determined that vapor intrusion of trichloroethene (TCE) was adversely impacting the indoor air. Calculations using Fick's First Law of Diffusion are presented which demonstrate that diffusion alone can theoretically account for all the TCE observed in the indoor air at this building based on an effective diffusion coefficient for concrete that was calculated from the Johnson and Ettinger Model. Two groups of nine replicate PADS were deployed at two areas on the slab and used to measure the flux and effective diffusion coefficient at each of the 18 total points, which showed an order of magnitude variability within each area and over two orders of magnitude variability overall. These results indicate that diffusion through concrete is inherently variable when measured at a sub-meter scale. However, when combined over both areas, the overall average approached that calculated from the Johnson and Ettinger Model. An additional 12 PADS were deployed across the building slab (for a total of 30) to quantify the overall building-wide diffusive flux. This area-weighted average diffusive flux was consistent with the predicted diffusive flux as calculated from Fick's First Law and the vapor intrusion mass input required to achieve the observed indoor air TCE concentration. The results of this study show that PADS provides a simple way to measure diffusive flux directly without having to drill through the slab. However, significant variability in the measured flux should be expected and will need to be accounted for by the inclusion of a relatively large number of samples including replicates. When using PADs at a new site, the collection of traditional subslab vapors at a select number of locations is recommended for the verification of a building-specific effective diffusion coefficient, which may not necessarily be the same as for this building.</p>","PeriodicalId":55081,"journal":{"name":"Ground Water Monitoring and Remediation","volume":"45 1","pages":"30-54"},"PeriodicalIF":1.3,"publicationDate":"2024-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143431628","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":"Studies in Parameter Estimation for Analytical Transport Equations","authors":"Andrew Mills","doi":"10.1111/gwmr.12684","DOIUrl":"10.1111/gwmr.12684","url":null,"abstract":"<p>Three new programs have been developed to perform parameter estimation to assist in the calibration of analytical contaminant transport models. The Domenico equation was chosen as an example analytical model for each of the three programs rather than a model with the exact solution, because the former is a closed-form expression involving significantly less processing time. One of the programs studied is a quasi-exhaustive search method and the second is a successive parameter variation method. The third program is based on Box's Complex nonlinear, direct-search optimization method. The three programs and an already available calibration tool (PEST) were compared in tests using data from two different sites in southeastern Pennsylvania. These tests demonstrated the validity of the three programs as examples to assist the calibration of groundwater analytical transport models. The final estimates for the parameter values for the three methods and PEST applied to the data from each of the two sites compared quite closely and, with two exceptions were well within an order of magnitude of each other. The three newly available programs individually should serve as calibrating tools indispensable for field hydrogeologists, environmental project managers, and others who have been asked to run analytical transport models. The results from the runs performed on the two sites indicate the Complex method to be the best option as a calibration tool, with the quasi-exhaustive method and the successive parameter estimation method being acceptable alternatives.</p>","PeriodicalId":55081,"journal":{"name":"Ground Water Monitoring and Remediation","volume":"45 1","pages":"80-87"},"PeriodicalIF":1.3,"publicationDate":"2024-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142195399","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":"Issue Information - ISSN page","authors":"","doi":"10.1111/gwmr.12528","DOIUrl":"10.1111/gwmr.12528","url":null,"abstract":"","PeriodicalId":55081,"journal":{"name":"Ground Water Monitoring and Remediation","volume":"44 3","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/gwmr.12528","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141994187","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":"Featured Products","authors":"","doi":"10.1111/gwmr.12675","DOIUrl":"10.1111/gwmr.12675","url":null,"abstract":"","PeriodicalId":55081,"journal":{"name":"Ground Water Monitoring and Remediation","volume":"44 3","pages":"146-147"},"PeriodicalIF":1.3,"publicationDate":"2024-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141994195","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":"Climatic Effects on Vapor Flow and Behavior in the Vadose Zone","authors":"Bart Eklund","doi":"10.1111/gwmr.12682","DOIUrl":"10.1111/gwmr.12682","url":null,"abstract":"<p>The concentrations and transport of volatile organic compounds (VOCs) and other vapors in the vadose zone may exhibit some degree of temporal variability due to the effect of various climatic factors, including (1) Air temperature; (2) Barometric pressure; (3) Surface winds; and (4) Soil moisture, including the effects of any water infiltration and/or changes in groundwater level. These variables may directly affect the rates of gas transport through the vadose zone or may indirectly affect transport by changing the soil-gas concentrations at a given location and depth. To understand the potential effect of these factors due to climate change, it is first necessary to understand their effect over typical time periods of one to several days, seasonally, and annually. In this paper, the effects of the above variables over various time periods are presented and the long-term effects due to climate change are discussed. Standard approaches for soil-gas measurement attempt to account for these variables, either to negate their potential influence or to capture data under reasonably worst-case conditions. The appropriateness and adequacy of typical soil vapor measurement approaches are discussed.</p>","PeriodicalId":55081,"journal":{"name":"Ground Water Monitoring and Remediation","volume":"44 4","pages":"80-91"},"PeriodicalIF":1.3,"publicationDate":"2024-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/gwmr.12682","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142195400","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}