Emergency responder and public health considerations for plastic sewer lining chemical waste exposures in indoor environments

JOURNAL OF HAZARDOUS MATERIALS

卷:422

Article

Noh, Yoorae¹  Boor, Brandon E.¹  Shannahan, Jonathan H.²  Troy, Cary D.¹  Jafvert, Chad T.^1,3  Whelton, Andrew J.^1,3 

[1] Purdue Univ, Lyles Sch Civil Engn, 550 Stadium Mall Dr, W Lafayette, IN 47907 USA

[2] Purdue Univ, Sch Hlth Sci, 550 Stadium Mall Dr, W Lafayette, IN 47907 USA

[3] Purdue Univ, Div Ecol & Environm Engn, 550 Stadium Mall Dr, W Lafayette, IN 47907 USA

关键词: Sewer repair;    Plumbing;    Vapor intrusion;    Styrene;    Volatile chemical products;    Building ventilation;   

DOI  :  10.1016/j.jhazmat.2021.126832

来源: Elsevier

【 摘 要 】

The cured-in-place pipe (CIPP) manufacturing process is used to repair buried pipes, and it's waste commonly discharged into the air can enter nearby buildings. Exposure can prompt illness and need for medical care. A mass balance model was applied to estimate indoor styrene concentrations due to intrusion of CIPP emissions through plumbing under different bathroom ventilation conditions. To better understand building contamination and recommend emergency response actions, calculations to estimate chemical intrusion through plumbing were developed. Field reports and study calculations showed that contractor-applied external pressures during plastic manufacture have and can displace plumbing trap water seals. Modeled styrene vapor concentrations that entered the building (1, 300, 1000 ppm) were similar to those measured at CIPP worksites. Modeling revealed that in some cases, bathroom exhaust fan operation during a CIPP project may increase indoor styrene concentrations due to enhanced entrainment of styrene-laden air from the sink and toilet. However, styrene concentrations decreased with increasing air leakage across the bathroom door due to reduced suction from the plumbing system. CIPP waste discharges should be treated as hazardous material releases and can pose a threat to human health. Immediate building evacuation, respiratory protection, provision of medical assistance, source elimination, and building decontamination are recommended.

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