2-Acre Contaminated Site 

This survey included a utility survey using Ground Penetrating Radar (GPR) and Geoprobe soil sampling using direct push technology (DPT) soil sampling for identifying and locating a contamination plume consisting of lead chromate inks residues.  The area was approximately two (2) acres in size.  The site contained thick vegetation, and consisted of a sandy hill along the western extent of the area, and a detention pond in the southeastern corner.  A canal leading from the detention pond intersected a roadside canal along SR-70 W.  The area of possible contamination was centered on areas surrounding this canal.

The GPR survey consisted of 67 transects created using a SIR-2000 control unit and a 400 MHz antenna.  Utilities that were located within the study area were both mapped and marked in the field.  Known utilities included a septic tank located approximately west of center in an area of vegetation.   Soil screening was conducted using the track-mounted DPT limited access drill rig with all work conducted by 40-hour OSHA trained personnel using appropriate Level D, personal protective equipment (PPE).   

Potential boreholes for soil sampling were located on a grid through the area.  Although as many as 75 boreholes were proposed to be sampled, only 60 samples were taken.  The actual number of borings was less than initially anticipated through the use of X-Ray Fluoresence (XRF) soil screening techniques conducted on the soil samples collected from the soil borings performed by SEI at the site.  The onsite XRF soil screening, provided immediate mapping of both lead and chromium concentrations and the mapping of these concentrations limited the number and extent of the contaminants present in the soil.