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A toilet in the storage building structure was observed. It is unknown if it connected to a septic system, but doubtful since the septic system for the property was destroyed/removed when the property was connected to City sewer. Evaluation of each point -source potential contamination described (i.e., the referenced discarded materials, discarded plastering items) and non -point sources (i.e., possible nitrate in the underlying groundwater) pose an infinitesimal risk to the subject property and to human health. Historical septic system density at one time could be considered dense; however, now the area is served by Municipal Stockton sewer and Cal Water Services. It is virtually impossible that any of the referenced ERS point -source sites or the referenced "case closed" site on Geotracker could adversely affect groundwater, soil or air over and under the property. There are no observable aboveground storage tanks nor underground tank appurtenances on the property. Therefore, it may be considered almost impossible that any tanks in this locale may affect the property because of the distances 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 referenced discards/garbage/trash can be considered de minimus conditions. However, the plastering materials and possibly paint materials should be disposed of properly. Residents of Stockton can take household hazardous waste to the San Joaquin County Household Hazardous Waste (HHW) Consolidation Facility for free. 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 other than taking referenced material to the HHW and the proper disposal of the garbage and trash referenced, 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 engineer for the subdivision portion of this project and is currently in the process of completing 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. Eel Chesney Consulting