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r Phase I Environmental Site AssessmeN epdate `,% Page 6 Teixeira-Souza Property—Villages D2,D3,and D4 October 27,2006 WKA No.: 5475.10 RECOMMENDATIONS To determine any potential fixture impacts to the site,the progress of the soil and groundwater investigation at the facility should be followed. It should be noted that Shell Oil Company is currently under RWQCB direction to assess and remediate petroleum related impacts to soil and groundwater resulting from the Shell Pipelines release. Because there is no other known or suspected sources of petroleum hydrocarbon releases on the Teixeira-Souza property, identification of these constituents in soil or groundwater at the site during future assessment activities should be brought to the attention of Shell Oil Company so that their remediation efforts can be completed in accordance with current regulatory agency standards. If any water supply wells or septic systems and associated leach fields and/or dry wells are encountered during earthwork activities, they must be properly abandoned in accordance with San Joaquin County requirements and the recommendations of a qualified geotechnical engineer. In summary, WKA has completed this Phase I ESA Update for the Mountain House Teixeira- Souza Property,Villages D2, D3, and D4,the workscope items of which were performed in general conformance with the scope and limitations of Section 4.6(Continued Viability of Environmental Site Assessment), and Sections 4.7 and 8.4 (Prior Assessment Usage) of the ASTM Standard E 1527-05 for Environmental Site Assessments. No exceptions to,or deletions from the Standard Practice,with respect to the selected ASTM workscope items, were made during the completion of this update. Non-scope considerations, such as naturally occurring asbestos, wetlands evaluation, laboratory testing of the soils and groundwater beneath the site for environmental contaminants (such as agricultural-related pesticides,termiticides, PCBs, or arsenic and lead), and assessments for asbestos containing materials and lead-based paint were not included or requested as part of this Phase I ESA. LIMITATIONS The statements and conclusions in this report are based upon the scope of work described above and on observations made only on the date of the updated site reconnaissance, August 14, 2006. The work was performed using a degree of skill consistent with that of competent environmental consulting firms performing similar work in the area. WKA has attempted to obtain information INK WALLACE•KUHL I,ASSOCIATES INC.