Residential Proximity to Conventional and Unconventional Wells and Indoor Air Volatile Organic Compounds in the Exposures in the Peace River Valley (Experiva) Study

39 Pages Posted: 25 Jun 2024

See all articles by Coreen Daley

Coreen Daley

affiliation not provided to SSRN

Miranda Doris

University of Toronto

Marc-André Verner

affiliation not provided to SSRN

Jad Zalzal

University of Toronto

Romain Chesnaux

affiliation not provided to SSRN

Laura Minet

University of Victoria

Mary Kang

affiliation not provided to SSRN

Heather L. MacLean

University of Toronto - Department of Civil & Mineral Engineering

Marianne Hatzopoulou

University of Toronto

Naomi Owens-Beek

affiliation not provided to SSRN

West Moberly First Nations Chief and Council

affiliation not provided to SSRN

Élyse Caron-Beaudoin

affiliation not provided to SSRN

Abstract

Background: In a previous study located in Northeastern British Columbia (Canada), we observed associations between density and proximity of oil and gas wells and indoor air concentrations of certain volatile organic compounds (VOCs). Whether conventional or unconventional well types and phases of unconventional development contribute to these associations remains unknown. Objective: To investigate the associations between proximity-based metrics for conventional and unconventional wells and measured indoor air VOC concentrations in the Exposures in the Peace River Valley (EXPERIVA) study samples. Methods: Eighty-four pregnant individuals participated in EXPERIVA. Passive indoor air samplers were analyzed for 47 VOCs. Oil and gas well legacy data were sourced from the British Columbia Energy Regulator. For each participant’s home, 5 km, 10 km and no buffer distances were delineated, then density and Inverse Distance Square Weighted (ID2W) metrics were calculated to estimate exposure to conventional and unconventional wells during pregnancy and the VOC measurement period. Multiple linear regression models were used to test for associations between the well exposure metrics and indoor air VOCs. For exposure metrics with >30% participants having a value of 0, we dichotomized exposure (0 vs. >0) and performed ANOVAs to assess differences in mean VOCs concentrations. Results: Analyses indicated that: 1) conventional well density and ID2W metrics were positively associated with indoor air acetone and decanal; 2) unconventional well density and ID2W metrics were positively associated with indoor air chloroform and decamethylcyclopentasiloxane, and negatively associated with decanal; 3) drilling specific ID2W metrics for unconventional wells were positively associated with indoor air chloroform. Conclusion: Our analysis revealed that the association between the exposure metrics and indoor air acetone could be attributed to conventional wells and the association between exposure metrics and indoor air chloroform and decamethylcyclopentasiloxane could be attributed to unconventional wells.

Note:
Funding Information: The project was partially funded by a XSeed Program Grant from the University of Toronto awarded to Élyse Caron-Beaudoin and Marianne Hatzopoulou. EXPERIVA is funded through a Project grant from the Canadian Institutes of Health Research (CIHR) (Application ID 390320) awarded to Marc-André Verner and Élyse Caron-Beaudoin. During the EXPERIVA study recruitment, Élyse Caron-Beaudoin was supported through a CIHR postdoctoral fellowship (Funding Reference Number 159262). André Verner is supported by a Research Scholar J2 Award from the Fonds de Recherche du Québec-Santé (FRQS).

Conflict of Interests: The authors declare they have nothing to disclose.

Ethical Approval: The study received ethical approval from the Université de Montréal Institutional Review Board (#CERC-18-003-P), the University of Toronto Research Ethics Board and the Northern Health Research Review Committee.

Keywords: Hydraulic fracturing, Unconventional oil and gas, Northeastern British Columbia, Air pollution, gestational exposure, Inverse Distance Square Weighted

Suggested Citation

Daley, Coreen and Doris, Miranda and Verner, Marc-André and Zalzal, Jad and Chesnaux, Romain and Minet, Laura and Kang, Mary and MacLean, Heather L. and Hatzopoulou, Marianne and Owens-Beek, Naomi and Chief and Council, West Moberly First Nations and Caron-Beaudoin, Élyse, Residential Proximity to Conventional and Unconventional Wells and Indoor Air Volatile Organic Compounds in the Exposures in the Peace River Valley (Experiva) Study. Available at SSRN: https://ssrn.com/abstract=4868906 or http://dx.doi.org/10.2139/ssrn.4868906

Coreen Daley

affiliation not provided to SSRN ( email )

No Address Available

Miranda Doris

University of Toronto ( email )

105 St George Street
Toronto, M5S 3G8
Canada

Marc-André Verner

affiliation not provided to SSRN ( email )

No Address Available

Jad Zalzal

University of Toronto ( email )

105 St George Street
Toronto, M5S 3G8
Canada

Romain Chesnaux

affiliation not provided to SSRN ( email )

No Address Available

Laura Minet

University of Victoria ( email )

3800 Finnerty Rd
Victoria, V8P 5C2
Canada

Mary Kang

affiliation not provided to SSRN ( email )

No Address Available

Heather L. MacLean

University of Toronto - Department of Civil & Mineral Engineering ( email )

Marianne Hatzopoulou

University of Toronto ( email )

Naomi Owens-Beek

affiliation not provided to SSRN ( email )

No Address Available

West Moberly First Nations Chief and Council

affiliation not provided to SSRN ( email )

No Address Available

Élyse Caron-Beaudoin (Contact Author)

affiliation not provided to SSRN ( email )

No Address Available

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