Changes in neighborhood air quality after idling of an urban oil production site,Environmental Science: Processes & Impacts

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Changes in neighborhood air quality after idling of an urban oil production site
Environmental Science: Processes & Impacts ( IF 4.3 ) Pub Date : 2021-5-19 , DOI: 10.1039/d1em00048a
Jill E Johnston ₁ , Kristen Okorn ₂ , Yoshira Ornelas Van Horne ₁ , Amanda Jimenez ₁

Affiliation

Oil and gas development is occurring in urban, densely populated neighborhoods; however, the impacts of these operations on neighborhood air quality are not well characterized. In this research, we leveraged ambient air monitoring adjacent to an oil and gas production site in Los Angeles, California during active and idle periods. This study analyzed continuous methane (CH₄) and non-methane hydrocarbon (NMHC) measurements, together with triggered grab samples and 24 hour integrated canister samples collected by the South Coast Air Quality Management District. Ambient air pollutant levels and trends were evaluated during active and idle well operations to assess changes in neighborhood air quality after the suspension of oil and gas production. We find that mean concentrations of methane, NMHC, benzene, toluene, ethylbenzene, xylenes, styrene, n-hexane, n-pentane, ethane, and propane decreased following the stop in production activities. Using a source apportionment approach, we observed that the “natural gas” drilling source contributed 23.7% to the total VOCs measured during the active phase, and only 0.6% to the total measured VOCs in the idle phase. Near urban oil and gas production sites, residents may face poorer air quality due to the oil and gas activities which may pose adverse health and environmental risks among proximate communities.

中文翻译：

闲置后的城市石油生产基地后周边空气质量的变化

石油和天然气的开发正在人口密集的城市社区中进行。但是，这些操作对附近空气质量的影响尚不十分清楚。在这项研究中，我们在活动和闲置期间都利用了位于加利福尼亚洛杉矶的一个油气生产基地附近的环境空气监测功能。这项研究分析了连续甲烷（CH ₄）和非甲烷碳氢化合物（NMHC）的测量值，以及由南海岸空气质量管理区收集的触发抓取样品和24小时集成罐样品。在活跃和闲置的油井作业期间，对周围空气污染物水平和趋势进行了评估，以评估油气生产暂停后邻里空气质量的变化。我们发现甲烷，非甲烷总烃，苯，甲苯，乙苯，二甲苯，苯乙烯，那平均浓度ñ正己烷，ñ停止生产活动后，戊烷，乙烷和丙烷减少。使用源分配方法，我们观察到“天然气”钻井源在活动阶段测得的总VOC占23.7％，在闲置阶段测得的总VOC仅占0.6％。在城市油气生产基地附近，居民可能因油气活动而面临较差的空气质量，这可能给邻近社区带来不利的健康和环境风险。

更新日期：2021-05-25

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