Phase 2 Subsurface Environmental Investigations

The primary objective of conducting subsurface environmental investigations for real property is to: (1) document the presence or absence of unauthorized hazardous substances/waste releases, (2) delineate the extent of past and present contaminant migration and concentrations in soil and groundwater, and (3) determine site-specific hydrogeologic data for assessing risk and potential remedial action alternatives. ERI's staff has extensive experience in conducting a variety of Phase 2 soil, vapor, and groundwater investigations.

Our capabilities include the following:

• Development of sound, strategic work plans to minimize costs and to maximize usable data, taking into account all relevant historical information and existing data, plus incorporating your objectives and goals.
• Use of solid-stem auger, hollow-stem auger, mud and air rotary, reverse rotary, sonic, percussion hammer, and cable tool drill rigs, and direct-push and sonic vibration technologies to meet any drilling conditions.
• Installation and development of vapor and groundwater monitoring wells, extraction wells, and observation wells.
• Use of wipe samplers, bulk material samplers, modified split-barrel samplers, cone penetration meters, standard penetration tubes, continuous core samplers, and slide hammer samplers to obtain samples from a variety of materials including soil, sludge, and surface residues.
• Vapor and groundwater sampling using both manual bailing and a variety of pumping methods.
• Aquifer testing to evaluate aquifer characteristics such as hydraulic conductivity, storativity, and radius of influence.
• Soil, vapor, and groundwater modeling to evaluate risk, capture zones, contaminant transport, retardation, and biodegradation. ERI has successfully managed subsurface projects ranging from small underground storage tank investigations to large multidisciplinary remedial action/feasibility studies.

ERI has successfully managed subsurface projects ranging from small underground storage tank investigations to large multidisciplinary remedial action/feasibility studies.

ERI conducts subsurface investigations in accordance with current regulatory protocols and requirements—and the constantly changing industry standards. In addition, ERI's internal Quality Assurance and Quality Control (QA/QC) program documents and reviews all techniques used to obtain, preserve, and ship samples for laboratory analysis. ERI's QA/QC program integrates the field and laboratory sampling and analysis activities by providing the field program with chain-of-custody documentation, and when necessary, documented blanks, spikes, splits, and standards.

Once a subsurface investigation has been completed, ERI can help coordinate the proper transportation and disposal of any waste materials generated.

Phase 1 Site Assessments Phase 2 Investigations Phase 3 Remedial Action Groundwater Operation/Maintenance Litigation/Resolution	Regulatory Compliance Pilot Testing Biological Treatment Wastewater Treatment Storm Water Construction Management

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