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Impacts of Oil and Natural Gas Development and Other Sources on Volatile Organic Compound Concentrations in Broomfield, Colorado.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Impacts of Oil and Natural Gas Development and Other Sources on Volatile Organic Compound Concentrations in Broomfield, Colorado./
作者:	Lachenmayer, Emily.
面頁冊數:	1 online resource (124 pages)
附註:	Source: Masters Abstracts International, Volume: 84-02.
Contained By:	Masters Abstracts International84-02.
標題:	Atmospheric chemistry. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=29206703click for full text (PQDT)
ISBN:	9798841783114

Impacts of Oil and Natural Gas Development and Other Sources on Volatile Organic Compound Concentrations in Broomfield, Colorado.
Lachenmayer, Emily.

Impacts of Oil and Natural Gas Development and Other Sources on Volatile Organic Compound Concentrations in Broomfield, Colorado. - 1 online resource (124 pages)

Source: Masters Abstracts International, Volume: 84-02.

Thesis (M.S.)--Colorado State University, 2022.

Includes bibliographical references

In 2017 substantial new oil and natural gas (ONG) extraction was approved by the City and County of Broomfield (CCOB). A monitoring program was established by CCOB to determine how new ONG extraction impacted local air quality. Multiple instruments were utilized to monitor air quality in the county including weekly volatile organic carbon (VOC) sampling canisters deployed across CCOB by Colorado State University and Ajax Analytics and hourly VOC, methane, and criteria pollutant measurements taken by the Colorado Air Monitoring Mobile Lab (CAMML) deployed near an ONG well-pad by the Colorado Department of Public Health and Environment (CDPHE). Weekly samples, collected from October 2018 through December 2020 were analyzed for 52 VOCs using a 5-channel gas chromatograph. The CAMML reported 20 VOCs, methane, PM2.5, PM10, nitrogen oxides (NO_x), and ozone. Positive Matrix Factorization (PMF) was applied to both datasets to characterize key air pollution sources and their impacts in space and time. Six factors were found to describe the weekly data best: Background (biogenic), Combustion, Light Alkane, Complex Alkane, a Drilling factor, and an Ethyne factor. Contributions of the ONG-related PMF factors increased most strongly near well-pads during particular ONG pre-production activities. The Light Alkane factor was most active during production and coiled tubing operations, and flowback at one or more of the new well-pads. The Complex Alkane factor was strongly associated with drilling and coiled tubing operations and flowback at one of two well-pads. The Drilling factor contained a VOC profile that closely matched volatiles released from a drilling mud (lubricant for the drill bit) used at two of the three sites. The Ethyne profile represents an unknown and previously undocumented source composition originating from a well-pad. This ethyne and benzene-rich emission was independently observed in other CCOB air monitoring efforts. The CAMML hourly data was best described by four factors using the VOC + {CH}_4 anomaly concentrations. The Drilling, Light Alkane, and Heavy Alkane factors mirrored those found in the weekly data while the fourth hourly CAMML factor, the Combustion + Biogenic factor, was a combination of the Background and Combustion factors found in the weekly data. This merging of factors is likely due to similarities in the diurnal cycle and the inability to sample both factors seasonal cycles. Benzene was a particular focus of the study given its potential health effects at modest concentration levels. On average, the source factors contributing most to benzene were combustion (38%), longer-lived alkanes from ONG production (22%), and shorter-lived alkanes from ONG production (16%). On average ONG-related factors were found to contribute 51% of the benzene measured across CCOB during the study period. ONG activities contributed more strongly to benzene levels at near-pad locations, especially during pre-production and production phases.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2023

Mode of access: World Wide Web

ISBN: 9798841783114Subjects--Topical Terms:

544140
Atmospheric chemistry.
Subjects--Index Terms:

Oil developmentIndex Terms--Genre/Form:

542853
Electronic books.

Impacts of Oil and Natural Gas Development and Other Sources on Volatile Organic Compound Concentrations in Broomfield, Colorado.
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