The August Mack team acted as a subcontractor for a client at an air force base Michigan to investigate and address areas of the site where there were releases of per- and polyfluorinated substances during the operations of the base. Services provided by August Mack employees during this contract included drilling of vertical aquifer sampling (VAS) locations; performing 28 vertical aquifer samples at depths of 45, 60, and 70 feet below ground surface; installing 28 two-inch monitoring wells in support of ongoing investigating activities; monitoring of well development; continuous logging of soil lithology; providing soil cores to Wood personnel; decontamination of equipment before and between each sample location; and management of project waste.