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§ 5.0 CONCLUSIONS AND RECOMMENDATIONS § 5.1 Evaluation of each point -source potential contamination described (i.e., a historical septic tank, and three case closed sites) and non -point sources (i.e., possible agricultural spray drift) pose an infinitesimal risk to the subject property and to human health. Historical septic system density at one time could be considered sparse; however, now the area is primarily served by Municipal Stockton water and sewer services. The referenced "barn" and boat storage structures contain no hazardous materials. It is virtually impossible that any of the referenced ERS point -source sites could affect groundwater, soil or air over and under the property. There are no observable aboveground storage tanks nor underground tank appurtenances on, or immediately surrounding the property. Therefore, it may be considered almost impossible that any tanks in this locale may affect the property because of the distances and groundwater directional flows involved. The ASTM E-1527-05 Document referenced on Page 2 refers to de minimus environmental conditions. De minimus conditions generally do not present a material risk to public health or to the environment and generally would not include an enforcement action if observed by the appropriate governmental agencies. The only de minimus conditions observed was the referenced lawn/garden chemical storage in the greenhouse structure. Section 9-905.12 of San Joaquin County Development Title states "Corrective Action: If the report indicates there are surface and subsurface contamination, corrective action shall be recommended in the report and concurred with by Environmental Health prior to the issuance of the building permit." It is my professional opinion that no corrective action is required regarding the subject property. § 5.2 The Appendices, found in Section 7 incorporate all of the applicable information referenced in this Report. § 5.3 See below for signature and stamp. § 5.4 Wong Engineers, Inc. is the civil engineer for the subdivision portion of this project and is currently in the process of submitting the Tentative Parcel Map. § 5.5 As referenced above, the Appendices contain the documentation to support the applicable data and information found in this Report. Chesney Consulting