Should I decide whether to have a mitigation system installed based on indoor air sampling results only?
No. In this case, indoor air sampling is being conducted only to identify the general indoor air quality of your property at a particular moment in time. It does not represent the potential for soil gas vapor to migrate into your home. For this reason, indoor air sampling is not to be used as a decision-making tool for deciding whether to have a vapor mitigation system installed. In order to know whether a potential vapor problem exists from contaminated ground water, indoor air sampling is typically coupled with sub-slab soil gas sampling. NJDEP has already confirmed the presence of elevated soil gas vapors in your neighborhood and DuPont has agreed to install vapor mitigation systems in each home. Therefore, additional sub-slab sampling for each home is not required by NJDEP.
