Through our global network of testing experts and analytical equipment including chromatography (HPLC, GC, GC/MS) and atomic
absorption spectroscopy (AAS, GFA, FIAS), Our goal is to provide test services as efficiently
as possible to maximize our customers' profits. For more information about our services,
contact one of our experts today.
Note: this service is for Research Use Only and Not intended for clinical use.
Subsurface vapor intrusion is the escape of VOCs from underground sources of contamination and into the indoor air of a building through soil pores and cracks. A subsurface vapor intrusion assessment is a process used to evaluate the risk and potential impacts of subsurface vapor intrusion. Recently, subsurface vapor intrusion has become a topic of particular interest. Vapor intrusion is increasingly being recognized as a significant exposure pathway, and more emphasis is being placed on remediating contaminated sites that introduce hazardous substances into indoor air.
Alfa Chemistry provides customized testing solutions and authoritative third-party test reports for subsurface vapor intrusion. We provide data quality that meets stringent regulatory requirements and offer fast turnaround data delivery to allow you to complete a successful vapor intrusion investigation.
Figure 1. Standard conceptual model for vapor intrusion. (McHugh T, et al. 2017)
Alfa Chemistry's laboratories have the analytical expertise and project management capabilities to provide analytical methods and reporting limits applicable to all vapor projects. We can perform EPA Methods TO-15 and TO-17 by gas chromatography/mass spectrometry (GC/MS) to provide results in parts per trillion for client-specific compound lists.
Mercaptans, including methyl mercaptan, ethyl mercaptan, etc. Sulfur Dioxide (SO2).
Standard methods for subsurface vapour intrusion assessment
Our stack emissions testing services are operated and analyzed in accordance with strict industry standard methods. Extensively validated, Alfa Chemistry can provide a range of approved analytical procedures for stationary source emissions. These standard methods ensure accurate, comparable and reliable testing and are widely recognized and accepted.
Designation
Title
ASTM D7663-12(2018)e1
Standard Practice for Active Soil Gas Sampling in the Vadose Zone for Vapor Intrusion Evaluations
OSWER Publication 9200.2-154.
OSWER Technical Guidelines for Assessing and Mitigating Vapor Intrusion Pathways from Subsurface Vapor Sources to Indoor Air
EPA TO-15
Determination Of Volatile Organic Compounds (VOCs) In Air Collected In Specially-Prepared Canisters And Analyzed By Gas Chromatography/Mass Spectrometry (GC/MS)
EPA TO-17
Determination of Volatile Organic Compounds in Ambient Air Using Active Sampling Onto Sorbent Tubes
If you require a vapor intrusion assessment service or inquire for further information, please contact our team. We will provide tailor-made solutions based on your specific needs and ensure your project receives professional support and service.
Reference
McHugh T, et al. "Recent Advances in Vapor Intrusion Site iInvestigations." Journal of Environmental Management. 2017, 204, 783-792.