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It is highly improbable that any of the referenced LUST and tes, or non-point sources (other than nitrate) could affect groundwater under the ect prop rty. The nitrate concentration in the underlying groundwater measure at 28 ppm ' the on-site well for the Nitrate Loading Study may be attributed to surroundi g agric ral inputs. The ASTM E-1527-00 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. Household hazardous materials may be considered de minimus concerns if there has been no spillage or dumping. Typical household"hazardous materials" include gasoline, paint thinners, new and used motor oil, antifreeze, etc. Spillage or dumping of hazardous substances were not noted in the areas around the residential structure before it was razed. It is noted in the Environmental Questionnaire that there was apparently never an above ground or underground storage tank on the property for as long as Mr. Davis has owned the property. 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." Therefore, it is my professional opinion that no corrective action is required on the subject property, as assessed. Septic system density in this locale can be considered very sparse. Consequently, the degree of nitrate-nitrogen impact from this source can be considered very small. § 5.2 The Appendices, found in Section 7 incorporate all of the applicable information / referenced in this Report. § 5.3 See Page 8 for signature and stamp. § 5.4 Mr. Terry Davis is currently in the process of submitting the land use application, throw his representative, Mr. Carl Fiorica, P.E. of RBF Consulting- (916) 928-2623. § 5.5 As referenced above, the Appendices contain the documentation to support the applicable data and information found in this Report. Page-7- Chesney Consulting