Purging and other sampling variables affecting dissolved methane concentration in water supply wells
| Autor: | Thomas E. McHugh, Tom Wagner, Albert S. Wylie, John A. Connor, Fred J. Baldassare, Anthony W. Gorody, Ann P. Smith, Lisa J. Molofsky, Stephen D. Richardson |
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| Rok vydání: | 2017 |
| Předmět: |
Environmental Engineering
0208 environmental biotechnology Population Soil science 02 engineering and technology 010501 environmental sciences 01 natural sciences Methane chemistry.chemical_compound Environmental Chemistry education Waste Management and Disposal 0105 earth and related environmental sciences Hydrology geography education.field_of_study geography.geographical_feature_category business.industry Fossil fuel Pollution 020801 environmental engineering Salinity chemistry Environmental science Sample collection Water quality business Groundwater Water well |
| Zdroj: | The Science of the total environment. 618 |
| ISSN: | 1879-1026 |
| Popis: | Determining whether changes in groundwater methane concentration are naturally occurring or related to oil and gas operations can be complicated by numerous sources of variability. This study of 10 residential water supply wells in Northeastern Pennsylvania evaluates how i) sampling from different points within the water well system, ii) purging different water volumes prior to sampling, and ii) natural variation over time, affects concentrations of naturally occurring dissolved methane and other water quality parameters. Among the population of wells, all had dissolved methane concentrations >1mg/L. Regardless of the volume of water purged or the timing between events, the maximum change in methane concentration (ratio of maximum to minimum concentration) among samples from a single well was 3.2, with eight out of ten wells exhibiting a maximum change less than a factor of two (i.e. |
| Databáze: | OpenAIRE |
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