Black Rock Geosciences routinely prepares Phase I Environmental Site Assessments. These assessments are conducted in a manner that exceeds ASTM 1527 and lender standards. Our staff possesses sufficient education, training, and experience necessary to develop opinions and conclusions regarding hazardous material releases or threatened releases within properties. Where possible during the property walkthrough, we will conduct shallow soil excavations in potentially impacted areas in order to document their general horizontal and vertical extents. This action, and the pre-emptive collection and analyses of potentially impacted soil (if approved by the client), generally prevents delays of property transfers or loans due to minor (de minimus) releases.
Black Rock Geosciences prepares Phase I Environmental Site Assessment reports for school properties prior to their planned construction or redevelopment. Phase I assessments conducted for schools require a more conservative approach due to the presence of at-risk students, as well as a greater degree of concern from the community. In addition to identifying potential contaminants and contaminant sources, these assessments typically lead to the sampling of soil in order to verify that there is no contamination. If contaminated soils are identified, we provide detailed remedial action plans and oversight services during their removal.
Black Rock Geosciences commonly conducts Phase I Environmental Site Assessments and subsurface investigations (if warranted) at older automotive repair centers. Data collected during the preparation of a Phase I assessment at a local Transmission Repair Shop revealed that there was a high probability of contaminated soil in a back open area. Waste solvents and oils generated at this shop had been disposed within an onsite leach field for over 40 years. Soil borings were used to confirm that the underlying soils were impacted, and to determine the vertical and horizontal extent of the contamination. Large-diameter augers excavated the soils from the area behind the building, and confirmation sampling showed that the impacted soil was completely removed.
Black Rock Geosciences frequently conducts subsurface investigations at properties with existing or former dry cleaning facilities. These investigations typically include the collection and analysis of soil samples from multiple soil borings. In one such example it was revealed that solvents released at a facility had impacted the underlying soil and groundwater. BRG determined the extent of impacted soil with additional borings. Multiple groundwater samples were collected in a grid pattern for 200 feet down gradient of the cleaning facility to assess the extent of impacted groundwater. Soil treatment included the use of vapor extraction technology, and groundwater treatment included the injection of microbes and a hydrogen-releasing compound.
Black Rock Geosciences has conducted over 30 soil and groundwater investigations at former or existing plating facilities and electronics manufacturing facilities. Such facilities are renowned for spilling plating solutions and/or solvents. In 2015, we were hired to investigate the extent of solvent-impacted soil and groundwater beneath and down-gradient of a former electronics manufacturing facility. The extent of impacted soil was assessed, and the groundwater contaminant plume was found to extend approximately ¼ mile from this property. The monitoring and sampling of the impacted groundwater remains underway, and the cleanup of the impacted soil and groundwater beneath this property will be completed by 2020 utilizing soil excavation and the injection of microbes and a hydrogen-releasing compound into the groundwater plume.
Black Rock Geosciences frequently provides testing and reporting services for construction projects that include the removal or replacement of underground fuel storage tanks (USTs), fuel dispensers, and the associated pipelines. These projects vary in scope, depending on the systems being removed and the local regulating agency. Soil samples are collected beneath the fuel-related structures and tested for the possible presence of fuel contaminants. If such impacts are encountered, the soil may be immediately excavated and the remaining soil retested.