Contaminated Soil Remediation by Excavation
Contractor License No: 1010931
On some occasions, a contaminated soil mass is best remediated by excavation and replacement of certified fill. Excavations are any man-made cuts, cavity, trench or depression by removal of earth material. Removing the source of contamination with surrounding affected soil keeps people from coming into contact with that contaminant, and also cuts-off the continuing groundwater contamination.
Prior to excavation, the complete lateral and vertical extent of the known contamination plume must be assessed. This is done through a series of subsurface investigations. See our Phase II Environmental Site Assessment Page for more information about testing soil. Additional site characterization may be required in furtherance of a Phase II ESA to fully define the extent of the plume. During the excavation, additional confirmation soil samples are collected to certify proper removal of the impacted mass. If excavations proceed below the groundwater table, additional measures are required such as pumping, walling off the contaminated area, and grab groundwater sampling/analysis.
Excavations must also comply with the safety codes and regulations established by the California Division of Occupational Safety and Health (DOSH), better known as Cal/OSHA, as well as the California Building Code (CBC) Appendix J. Geo Forward, Inc. is experienced with the various methods and applications for safeguarding onsite personnel, as well as the requirements for protective systems.
The final stages of contaminated mass excavation include the legal transfer and disposal/treatment of the impacted soil, as well as backfilling and compacting the open pit. For more information regarding compaction testing, please see our Soil Compaction Test Page.