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s d d d s d i d d r� • Prepare a Phase I ESA report containing a summary of the site reconnaissance observations, interviews with knowledgeable persons, database and regulatory file review, and summary of findings, conclusions, and recommendations for additional work (if applicable). Additional due diligence activities maybe pursued to further evaluate conditions that may materially affect the proposed acquisition or development of a property, depending on the results of the Phase I ESA. These additional activities include completion of asbestos and LBP identification surveys for improvements that will be demolished orsignificantly renovated as part of the planned development. Phase 11 Environmental Site Assessment Phase II site characterizations may be performed in order to provide more definitive information regarding potential environmental impairments that may need to be addressed contractually as part of a purchase and sale agreement or to define the costs associated with preparing a site for a particular end use. The overall objective of the Phase II is to determine the existence of a release of hazardous materials or wastes to the subsurface. TRC offers comprehensive experience in site characterization, with a reputation for consistently high quality service and efficient task /project completion. TRC's focus during site characterization is on field investigations and data collection, scientific analysis and interpretation of data, and aggressive negotiation with regulators to achieve progressive results and minimize risks and uncertainties associated with property acquisition and /or development. Site characterizations are conducted under the direction of a Professional Geologist, Certified Engineering Geologist, Certified Hydrogeologist, or Professional Civil Engineer. Where existing businesses are present, activities are performed to minimize site disturbance. Typical Phase II activities may include one or more of the following elements: • Collect near - surface soil samples at depths ranging from ground surface to 5 feet below grade using hand - augersampling devices. • Complete soil vapor surveys for the possible presence of volatile organic compounds (VOCs) in the subsurface. This type of investigation is typically conducted when the chemical(s) of potential concern are volatile and when there is uncertainty regarding the historical locations of features that may have used or contained solvents and light hydrocarbons (e.g., gasoline). • Evaluate subsurface features such as historical underground storage tanks (USTs) using geophysical techniques. Geophysical survey techniques employed may include Ground Penetrating Radar (GPR), Electra Magnetic (EM) methods, or a combination of both techniques. Geophysical surveys are typically performed when there is uncertainty regarding the current disposition of USTs identified during review of regulatoryfile information conducted during the Phase I ESA process. • Delineate the lateral and vertical extent of subsurface contamination using direct -push or hollow -stem auger drilling techniques. Direct -push drilling techniques are generally employed when the maximum depth of investigation is less than 30 feet below grade. Direct -push drilling techniques allow for collection of soil, groundwater, and soil vapor samples. Hollow -stem auger drilling techniques are typically utilized to collect soil samples and to install vapor or groundwater monitoring wells. • Analyze soil, vapor, or groundwater samples for the presence of constituents of potential concern. Laboratory analyses are performed by subcontracted California- certified laboratories in accordance with EPAsample preparation and analytical methodologies. • Evaluate the site characterization results including interpretation of subsurface lithology, distribution of chemicals of potential concern, and evaluate the potential significance of identified contamination with regard to liability, propertyvalue, and /orcostto remedy.