Background

Rail Site operations led to discrete releases of petroleum hydrocarbons and chlorinated solvents, primarily between the 1950s and 1990s. The contaminant levels posed the greatest concern to downgradient residential wells. Prior to the pilot test, an in-depth investigation was conducted which included a membrane interface probe (MIP) survey. A MIP is a high definition logging tool that measures volatile contamination along with soil electrical conductance and lithology. The results from this investigation provided actionable data for a treatment alternative. Specifically, key findings showed that the bulk of the mass was laterally narrow and limited to thin interbedded transmissive zones 8 to 15 meters bgs and that the aquifer consisted of heterogeneous silt and sand. Based on the data gathered, WSP chose to conduct a pilot test using PlumeStop and AquaZVI to treat the chlorinated ethanes and ethenes and their reductive daughter products in the groundwater. This remedy operates through three basic steps: The hydrocolloidal amendments are efficiently delivered; PlumeStop adsorbs the contaminants and limits their transport; and destruction is completed by co-application of AquaZVI, HRC and HRC Primer which stimulated degradation along both biotic and abiotic degradation pathways.

PlumeStop and AquaZVI Protect Property Boundaries