Design Verification Program - Lessons Learned from Pre-Application Assessments at In Situ Remediation Sites
From a reagent delivery and coverage standpoint, the most important TTZ characteristics are: A) gross soil type B) the nature and extent of the flux zones and C) positional relationship between COC mass storage and transport/flux zone units. Sedimentary processes have a direct effect on the above relationships. These processes directly affect COC mass storage and distribution as well as remedial reagent selection and application methods. To assist design and application teams, a set of routine pre-application “Design Verification” steps have been developed and performed on select project sites (N=100). These steps are used to identify the relationship between COC storage and distribution units within the TTZ. Identification of these variables has contributed to an overall improvement in application programs and is seen as a key element in higher remedial success rates.
We will address the use of traditional field-based logging techniques that have been shown to provide valuable information that can be used to steer design and application programs prior to field mobilization. A summary of results to date will be presented.