Zimmerman John H, Williams Alan, Schumacher Brian, Lutes Chris, Levy Laurent, Buckley Gwen, Boyd Victoria, Holton Chase, McAlary Todd, Truesdale Robert
US EPA/ORD/CEMM/WECD, 109 T.W. Alexander Drive, Durham, NC 27709.
U.S. EPA Office of Research and Development (ORD), Research Triangle Park, NC.
Ground Water Monit Remediat. 2024 Jun 8;44(3):106-121. doi: 10.1111/gwmr.12663.
Subslab soil gas (SSSG) samples were collected as part of an investigation to evaluate vapor intrusion (VI) into a building. The June 2015 Office of Solid Waste and Emergency Response (OSWER) VI Guide (U.S. Environmental Protection Agency [U.S. EPA] 2015) does not provide specific, detailed recommendations regarding how to collect SSSG samples. The data collected in this study will be used to provide input into future OSWER VI Guidance documents on SSSG sample collection. To this end, three different types of subslab sampling ports were constructed with various sampling techniques within a hexagon-shaped grid in near proximity to each other. Conventional-, Vapor Pin-, and California-style ports were established in duplicate for continual analysis by onsite gas chromatography-electron capture detection (GC-ECD). Triplicate ports were established to evaluate active and passive long-term sampling methods to determine short range temporal differences. Active sampling methods included evacuated stainless-steel canisters fitted with capillary flow controllers (Modified U.S. EPA Method TO-15 [U.S. EPA 1999a]) and sorbent tubes collected using a syringe (Modified EPA TO-17 [U.S. EPA 1999b]). The Passive sampling method used was sorbent tube samples collected following the EPA TO-17 sampling method (Modified). This study did not identify any systematic differences in sample results between conventional, Vapor Pin, and CA-style probes for used in SSSG sampling. The decisions for site management would probably be the same for data from any subslab port style, active or passive sampling techniques over durations less than 2 weeks.
作为一项评估建筑物内蒸汽侵入（VI）调查的一部分，采集了地下土壤气体（SSSG）样本。2015年6月的固体废物与应急响应办公室（OSWER）VI指南（美国环境保护局[U.S. EPA]，2015年）未就如何采集SSSG样本提供具体、详细的建议。本研究收集的数据将用于为未来OSWER关于SSSG样本采集的VI指南文件提供输入。为此，在彼此相邻的六边形网格内，采用各种采样技术构建了三种不同类型的地下采样端口。常规端口、蒸汽针端口和加利福尼亚式端口均设置了两份，以便通过现场气相色谱 - 电子捕获检测（GC - ECD）进行连续分析。设置了三份重复端口，以评估主动和被动长期采样方法，以确定短时间范围内的时间差异。主动采样方法包括配备毛细管流量控制器的抽空不锈钢罐（修改后的美国EPA方法TO - 15[U.S. EPA 1999a]）和使用注射器收集的吸附剂管（修改后的EPA TO - 17[U.S. EPA 1999b]）。所采用的被动采样方法是按照EPA TO - 1７采样方法（修改版）收集的吸附剂管样本。本研究未发现用于SSSG采样的常规探头、蒸汽针探头和加利福尼亚式探头在样本结果上存在任何系统差异。对于持续时间少于2周的任何地下端口类型、主动或被动采样技术的数据，场地管理决策可能是相同的。
