Historical analysis of monitored natural attenuation: A survey of 191 chlorinated solvent sites and 45 solvent plumes

McGuire, Travis M.; Newell, Charles J.; Looney, Brian B.; Vangelas, Karen M.; Sink, Claire H.

doi:10.1002/rem.20036

Cited by 44 publications

(27 citation statements)

References 8 publications

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“…Dissolved plumes in groundwater may prove persistent, especially when plumes emanate from dense non-aqueous phase liquid (DNAPL) source zones (Pankow and Cherry, 1996;Rivett et al, 2014). Plumes may also be lengthy due to their modest natural attenuation in many aquifer environments (McGuire et al, 2004). As such, dissolvedphase CHC plumes may hold significant potential to discharge to surface waters where they may pose risks to ecosystems and human receptors (Conant et al, 2004;McGuire et al, 2004;McKnight et al, 2010;Moran et al, 2007;Weatherill et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

“…Plumes may also be lengthy due to their modest natural attenuation in many aquifer environments (McGuire et al, 2004). As such, dissolvedphase CHC plumes may hold significant potential to discharge to surface waters where they may pose risks to ecosystems and human receptors (Conant et al, 2004;McGuire et al, 2004;McKnight et al, 2010;Moran et al, 2007;Weatherill et al, 2014). Our focus is upon the final opportunity for natural attenuation of discharging CHC groundwater contaminants at the groundwater -surface water interface (GSI) and hyporheic zone therein.…”

Section: Introductionmentioning

confidence: 99%

“…Frequent real-site observations of CHC groundwater plumes eventually discharging to surface water systems (McGuire et al, 2004), legislative drivers such as the European Community Water Framework Directive (CEC, 2000), and modelling studies requiring field data validation , each provide impetus to undertake detailed field-scale studies. CHC plume studies include: detailed evaluation of hydrogeological and biogeochemical controls on the Pine River, Canada (Conant et al, 2004;Abe et al, 2009); assessment of biodegradation potential on the Zenne River, Belgium including the use of advanced compound-specific isotope and microbiological tools (Hamonts et al, , 2012Kuhn et al, 2009); attenuation in lower flow, higher carbon, wetland environments within the US (Lorah et al, 2005); and, the assessment of plume discharge and loss to atmosphere from small receiving streams upstream of a main river receptor in the US (Chapman et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

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Heterogeneous hyporheic zone dechlorination of a TCE groundwater plume discharging to an urban river reach

Freitas

Rivett

Roche

et al. 2015

Science of The Total Environment

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This version is available at https://strathprints.strath.ac.uk/62331/ Strathprints is designed to allow users to access the research output of the University of Strathclyde. Unless otherwise explicitly stated on the manuscript, Copyright © and Moral Rights for the papers on this site are retained by the individual authors and/or other copyright owners. Please check the manuscript for details of any other licences that may have been applied. You may not engage in further distribution of the material for any profitmaking activities or any commercial gain. You may freely distribute both the url (https://strathprints.strath.ac.uk/) and the content of this paper for research or private study, educational, or not-for-profit purposes without prior permission or charge.Any correspondence concerning this service should be sent to the AbstractThe typically elevated natural attenuation capacity of riverbed -hyporheic zones is expected to decrease chlorinated hydrocarbon (CHC) groundwater plume discharges to river receptors through dechlorination reactions. The aim of this study was to assess physico-chemical processes controlling field-scale variation in riverbed -hyporheic zone dechlorination of a TCE groundwater plume discharge to an urban river reach. The 50-m long pool -riffle -glide reach of the River Tame in Birmingham (UK) studied is a heterogeneous high energy river environment. The shallow riverbed was instrumented with a detailed network of multilevel samplers. Freeze coring revealed a geologically heterogeneous and poorly sorted riverbed. A chlorine number reduction approach provided a quantitative indicator of CHC dechlorination. Three sub-reaches of contrasting behaviour were identified. Greatest dechlorination occurred in the riffle sub-reach that was characterised by hyporheic zone flows, moderate sulphate concentrations and pH, anaerobic conditions, low iron, but elevated manganese concentrations with evidence of sulphate reduction. Transient hyporheic zone flows allowing input to varying riverbed depths of organic matter is anticipated to be a key control. The glide sub-reach displayed negligible dechlorination attributed to the predominant groundwater baseflow discharge condition and absence of hyporheic zone, transition to more oxic conditions and elevated sulphate concentrations expected to inhibit dechlorination. The tail-of-pool-riffle sub-reach exhibited patchy dechlorination that was attributed to sub-reach complexities including significant flow bypass of a low permeability, high organic matter, silty unit of high dechlorination potential. A process-based conceptual model of reach-scale dechlorination variability was developed. Key findings of practitioner relevance were: riverbed -hyporheic zone CHC dechlorination may provide only a partial, patchy barrier to CHC groundwater plume discharges to a surface water receptor; and, monitoring requirements to assess the variability in CHC attenuation within a reach are expected to be onerous. Further research on transient hyporheic zone dechlorination is...

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Heterogeneous hyporheic zone dechlorination of a TCE groundwater plume discharging to an urban river reach

Freitas

Rivett

Roche

et al. 2015

Science of The Total Environment

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“…The attached simple scoring system automatically generates an investigation priority ranking. It is based on thoughtful analysis of more complex scoring systems and published generalizing studies of behaviour of pollution plumes (Dahlen et al [3], Newell and Connor [4], Newell and McGuire [5], Mc Guire et al [6], Mc Nab et al [7], Teutsch et al [8]). Estimation of a pollution character, migration conditions and sensitivity of possible receptors are taken into consideration as decisive risk elements for the ranking.…”

Section: Priority Setting System -Principlesmentioning

confidence: 99%

Old pollution abatement: priority setting

Tylcer¹,

Zenaty²,

Gruntorad³

et al. 2007

WIT Transactions on Ecology and the Environment, Vol 102

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For old soil and groundwater pollution from the past, a 'polluter-pays' principle is not so simple to apply. Generally, a large-scale involvement of public financial sources is inevitable. Experience has proved that an appropriate information base and prioritisation are important conditions for effective allocation of effort and money for these purposes.Presently, a new national priority setting system is being tested in the Czech Republic. It sorts all polluted sites into several basic categories according to the statement specifying a character of the actual or potential pollution impact to public health, environment and/or to other interests. For each category, a corresponding principle of necessary or desirable action for mitigation of the risk issuing from the site pollution is explicitly defined. A basic qualitative statement characterizing a site pollution impact is preferentially based on results of its risk analysis. A simple scoring system is used to assess urgency for investigation of sites with lacking or insufficient data.

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“…Vol. 18(6), p. 8~17, 2013 term effectiveness of remediation techniques (McGuire et al, 2004;McGuire et al, 2006;Phillips et al, 2010). Previous studies have assessed the remediation efficiency based on the monitoring data, most of which were obtained from near-source zones.…”

Section: Introductionmentioning

confidence: 99%

Evidences of in Situ Remediation from Long Term Monitoring Data at a TCE-contaminated Site, Wonju, Korea

Lee¹,

Kim²,

Lee³

et al. 2013

Journal of Soil and Groundwater Environment

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The contamination of chlorinated ethenes at an industrial complex, Wonju, Korea, was examined based on sixteen rounds of groundwater quality data collected from 2009 to 2013. Remediation technologies such as soil vapor extraction, soil flushing, biostimulation, and pumping-and-treatment have been applied to eliminate the contaminant sources of trichloroethylene (TCE) and to prevent the migration of TCE plume from remediation target zones. At each remediation target zone, temporal monitoring data before and after the application of remediation techniques showed that the aqueous concentrations of TCE plume present at and around the main source areas decreased significantly as a result of remediation technologies. However, the TCE concentration of the plumes at the downstream area remained unchanged in response to the remediation action, but it showed a great fluctuation according to seasonal recharge variation during the monitoring period. Therefore, variations in the contaminant flux across three transects were analyzed. Prior to the remediation action, the concentration and mass discharges of TCE at the transects were affected by seasonal recharge variation and residual DNAPLs sources. After the remediation, the effect of remediation took place clearly at the transects. By tracing a time-series of plume evolution, a greater variation in the TCE concentrations was detected at the plumes near the source zones compared to the relatively stable plumes in the downstream. The difference in the temporal profiles of TCE concentrations between the plumes in the source zone and those in the downstream could have resulted from remedial actions taken at the source zones. This study demonstrates that long term monitoring data are useful in assessing the effectiveness of remediation practices.

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Historical analysis of monitored natural attenuation: A survey of 191 chlorinated solvent sites and 45 solvent plumes

Abstract: A survey of experts in the application of natural attenuation was conducted to better understand how monitored natural attenuation (MNA) is being applied at chlorinated solvent sites. Thirty-four

Cited by 44 publications

References 8 publications

Heterogeneous hyporheic zone dechlorination of a TCE groundwater plume discharging to an urban river reach

Heterogeneous hyporheic zone dechlorination of a TCE groundwater plume discharging to an urban river reach

Old pollution abatement: priority setting

Evidences of in Situ Remediation from Long Term Monitoring Data at a TCE-contaminated Site, Wonju, Korea

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