The results of a Geotechnical Investigation may identify poor soils, which require excavation and backfilling with structural fill.  ACER is experienced in providing backfill specifications detailing both the extent of excavation and grade of backfill required to achieve structural standards.  ACER's structural fill specifications ensure the construction contractor will meet the excavation and backfill placement requirements  specified in the engineering analysis for each type of fill placement on a site.  ACER can provide compaction testing along with detailed GIS mapping using data collected with highly accurate GPS locating units for identification of daily work progress and quantification of material quantities.