Phase 2 Environmental Site Assessment

Work conducted as part of the Phase II ESA will be compliant with current EPA, Code of Federal Regulations (CFR), ASTM, SWRCB LUFT, and County of Los Angeles guidelines and standards. The report and any work plans shall also fulfill the requirements and guidelines of applicable regulators, as well as any other client specifications.

Objective for Environmental Compliance

The objective of a Phase II ESA is generally to assess the occurrence and extent of a suspected contaminant in soil, soil vapor, and/or groundwater. The extent of the suspected contaminants are assessed through conduct of soil gas surveys, drilling and collection of soil samples, and installation of wells and collection of groundwater samples, as appropriate. All drilling, soil and groundwater sample collection, and well construction procedures will be performed under the general supervision of a State of California Certified Engineering Geologist.

Phase II as an Environmental Risk Management Process

  • The first step in conducting a Phase II ESA is to obtain background information regarding the Site and/or any Site with and existing or closed environmental cases within the vicinity. The selection of appropriate investigative tools is made after all background information has been evaluated.
  • A typical investigation may involve advancing one or more soil borings as close to the suspected source as possible. Soil samples are typically collected at five foot depth intervals and field screened for the contaminant in question. All samples are typically submitted to a State-certified laboratory.
  • Some contaminants, notably chlorinated volatile organic compounds released to the surface from industrial operations, may be assessed using a soil gas survey. For a basic soil gas survey, soil gas probes are installed at probable source locations. FREY will direct the soil vapor survey and either advance the probes using an in-house field crew, or an outside firm, depending on the magnitude of the survey.
  • FREY’s senior project engineer or geologist will prepare a draft report that will document the work conducted, and summarize the results of data collected during a site investigation.
  • All reports are reviewed in entirety by Joe Frey, the principal certified engineering geologist. The draft report will be finalized in house and submitted to the Public Agencies for review and comment. The information collected will be evaluated and interpreted in context with the existing on-Site conditions. The final report will meet or exceed the standards set forth in the ASTME1903-11 Standard, “Standard Practice for Environmental Site Assessments: Phase II Environmental Site Assessment Process.”

Examples of FREY’s Environmental Remediation

  1. FREY was retained to conduct environmental site assessment services at a former Express Stop fueling station. The property was abandoned by previous owners/ operators, and in 2010 the property was determined to be a visual nuisance by the City of Indio and the City of Indio Redevelopment Agency. FREY was retained to assist with nominating the property for the State Water Resources Control Board, Emergency Abandoned and Recalcitrant Account program (EAR account) and the property was nominated into the EAR Account program in 2011. FREY was then retained by the City of Indio to conduct site assessment activities. FREY performed soil sampling and assessment activities on behalf of the City of Indio. FREY determined that the of concentrations of petroleum hydrocarbons was not defined, and that further assessment was needed. FREY performed soil and groundwater assessment activities in 2011. FREY plans to conduct additional investigation activities in 2016 and anticipates preparing a corrective action plan and beginning remediation activities at this site.
  2. In 2011, FREY was retained by the City of Indio to complete soil and groundwater monitoring and sampling activities at an ongoing fuel release case Site located at the current City of Indio Chamber of Commerce property. FREY drilled and sampled soil borings and installed additional groundwater monitoring wells in 2015. The case is under the jurisdiction of the Riverside County Department of Environmental Health (RCDEH), and FREY has completed soil and groundwater monitoring and sampling in accordance with the directives by the RCDEH. FREY anticipates case closure on this project in 2017.
  3. After conducting a Phase I ESA at the SDA Security Systems, Inc. property in San Diego, California, FREY was retained to conduct additional soil and soil vapor assessments at the property. FREY prepared and implemented a site-specific health and safety plan, reviewed substructure maps, obtained well installation permits from the San Diego County Department of Environmental Health, and marked the proposed drilling locations for Underground Service Alert (USA) to delineated subsurface utilities. FREY drilled and sampled six soil borings. Soil samples were collected and were submitted to a laboratory for analysis. Three (3) soil vapor probes were installed in the remaining soil borings. TPHg, BTEX, TBA, and naphthalene were detected at elevated concentrations in samples collected from four of the six boreholes sampled.