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+r Ld City of Stockton A6810Z07A May 29, 1996 Page 7 4.4 Technical Report: Upon completion of field and laboratory activities, a technical report will be prepared summarizing results and findings (including the final logs of soil borings and laboratory analysis reports). Evaluations will be provided regarding the vertical L., and lateral extent of PPC migration in soil and the presence or absence of PPCs in groundwater. If the data is adequate, a PPC contamination contour map and cross section will be prepared and an estimate of the mass and volume of contaminant will be provided. Finally, recommendations regarding the need for further site assessment and/or remedial action alternatives will be presented. 5.0 SITE SAFETY PLAN The site safety plan for Twining personnel assigned to this project is presented in Appendix B. 6.0 LIMITATIONS +� The proposed work is intended to be an interactive process. Additional work may be required to more fully assess the extent of petroleum product migration in soil. The purpose of a geologic/hydrogeologic study is to reasonably characterize existing site conditions based on the geology/hy.drogeology of the area. In performing such a study, it is understood that a balance must be struck between a reasonable inquiry into the site conditions and an exhaustive analysis of each conceivable environmental characteristic. Conditions of interest may exist at the site that cannot be identified by visual observation alone. Where subsurface exploratory work is performed, our professional opinions are based in part on interpretation of data from discrete sampling locations that may not represent actual conditions or unsampled locations. If conditions of interest are not identified during performance of the work, such a finding should not be construed as a guarantee that such conditions do not exist at the site. F LO The proposed work scope assumes the site will be accessible at the time work is performed. Twining shall not be responsible for damage to underground utilities or installations which are not accurately shown on site plans provided to Twining by the site owner before work begins. Security of the site is the responsibility of the client. The professional services will be performed, the findings obtained, and the conclusions prepared in accordance with generally-accepted engineering principles and practices in San Joaquin County at the time the work is performed. This warranty is in lieu of all other warranties, either expressed or implied.