New California Residences Safeguarded from Benzene and PCE in Soil Gas

Project snapshot highlights:

• New Apartment Complex on Former UST Site
• Benzene and PCE in Soil Gas
• Nitra-Seal and Passive Venting Offered Lowest-Cost, Long-Term Solution

In Central California, a former commercial site that previously housed underground storage tanks (USTs) is being redeveloped into a new apartment complex. Benzene, tetrachloroethene (PCE), and naphthalene contaminants were detected in the soil gas, creating a potential vapor intrusion (VI) risk. In response, the development team sought a preemptive VI mitigation solution that would not only meet regulatory standards but also be cost-effective and timely to implement. After weighing the available remediation options, Land Science’s Nitra-Seal passive vapor intrusion mitigation system (VIMS) was selected due to its low cost, ease of implementation, and long-term effectiveness.