The LNAPL Conceptual Site Model (LCSM) is the body of information describing aspects of the LNAPL and site setting necessary to satisfy the LNAPL remedial objectives. The LCSM is similar to a conceptual site model, which includes the source, pathway, and receptors, but the emphasis in the LCSM is on the source component (i.e., … Continue reading
Sites contaminated by chlorinated solvents present a daunting environmental challenge, especially at sites with dense nonaqueous phase liquid (DNAPL) still present. Restoring sites contaminated by chlorinated solvents to typical regulatory criteria (low parts-per-billion concentrations) within a generation (~20 years) has proven exceptionally difficult, although there have been successes. Site managers must recognize that complete restoration … Continue reading
Table 1. Summary of Site Characterization Needs for Contaminated Sediment Data Type Potential Site characterization Approach Implication for remedy selection Tools involved Physical characteristic Sediment stability Require to perform tests including bathymetric survey, grain size analysis, bed pins, scour chains, geochronology cores. Stable sediments require less erosion protection for capping options, conductive to monitored natural … Continue reading
FLUTe methods include a wide variety of flexible liner designs to perform functions. FLUTe provide a continuous seal of a borehole or pipe, and prevent migration of formation fluids through the open hole. No sealing grouts or bentonite seals are needed. FLUTe also could carry many useful devices such as tubing, instruments, absorbers, reactive covers, … Continue reading
