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Phase I Environmental Site Assessment l�erracon Proposed CarMax Automotive Dealership ■ Stockton, CA August 8, 2015 ■ Terracon Project No. NA157024 7.0 ADDITIONAL SERVICES Per the agreed scope of services specified in the proposal a limited Vapor Encroachment Screening was conducted. 7.1 Limited Vapor Encroachment Screening Terracon conducted a Limited Vapor Encroachment Screening (VES), in general accordance with the procedures included in ASTM E 2600-10, Standard Guide for Vapor Encroachment Screening on Property Involved in Real Estate Transactions. The purpose of the VES is to evaluate whether a vapor encroachment condition (VEC) may be present at the site. A VEC is defined by ASTM as the "presence or likely presence of chemical(s) of concern (COC)vapors in the subsurface of the target property caused by the release of vapors from contaminated soil or groundwater or both either on or near the target property as identified by the Tier I procedures in the Guide." This purpose was pursued through use of information collected in conjunction with the ESA, including existing/planned use of the site, type of structures located on the site, surrounding property description, user information, historical and physical records review, regulatory database review, manmade or natural conduits, as applicable, and a visual noninvasive reconnaissance of the site and adjoining properties. Limitations, ASTM deviations, and significant gaps (if identified) are evident from reviewing the applicable scope of services and the Phase I report text. The scope of work for the VES does not include regulatory file reviews (other than those performed as part of the Phase I ESA) or subsurface investigations to evaluate soil, soil gas, or groundwater quality, nor does it evaluate the potential for vapor intrusion into on-site structures or assess indoor air quality. 7.1.1 Existing / Planned Use of the Site/Structures The site is an approximately 7.19-acre tract of undeveloped land. Future planned use is to construct a new approximately 19,000-square foot (SF) commercial structure. 7.1.2 Surrounding Area Description The properties surrounding the site consist of undeveloped land, orchards, and retail development. 7.1.3 User Specialized Knowledge Jason Pruitt, client's representative, was not aware of any specialized knowledge for the site. Please refer to Section 1.6 for additional information. Responsive ■ Resourceful ■ Reliable 15