What formula should be used for treating adjacent to a foundation wall?

The correct choice for treating adjacent to a foundation wall is based on the quantities typically recommended for effective application of treatment materials. The value of .4 gallons for every 10 linear feet is consistent with industry standards for ensuring adequate coverage and effectiveness in treating areas that are in direct contact with foundation walls. This quantity allows for an appropriate absorption rate that helps in protecting against moisture and pest infiltration, which can be crucial in maintaining the integrity of a structure.

Selecting this amount provides a balance between ensuring that the treated area receives sufficient product without excessive application that could lead to waste or runoff. Each of the other options indicates different application rates that may not be as effective for this specific context; hence, they do not meet the established guidelines for treating adjacent to foundation walls as closely as the .4 gallons per 10 linear feet standard does.