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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. Spillage and dumping of a hazardous substance was not observed. The existing home on the property may contain lead paint, asbestos or hazardous materials that may or may not be typical. Typical household"hazardous materials"include gasoline, paint thinners, new and used motor oil, antifreeze, etc. 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 S, I action is required on the two proposed Parcels that are to compose the subject property. J The septic system density is extremely low on the property and surrounding areas. Consequently, the degree of nitrate-nitrogen impact from this source can be considered inconsequential. Nitrate impact would be considerably greater from agricultural production land. Application of ammonium sulfate material is in quantities below typical agronomic rates. As noted on the Lines of Equal Depth groundwater map, the static groundwater depth is approximately 70 feet. The lines of Equal Elevation map shows the groundwater directional flow to be in a northwesterly direction. This groundwater depth can be considered a medium depth and not necessarily easily impacted from adverse constituents, namely nitrate. The subject site is surrounded by properties that engage in production agriculture. Consequences of this surrounding land use include: noise, dust, odors, insects, machinery, crop dusting aircraft,trucks, exhaust and other environmental effects that may be offensive to some people. § 5.2 The Appendices, found in Section 7 incorporate all of the applicable information 2� referenced in this Report. § 5.3 See Page 7 for signature and stamp. § 5.4 Mr. and Mrs. Frost(the Applicants) are currently in the process of submitting the land use application. They were directed by Aspen Survey to proceed with this Surface and Subsurface Contamination Report, to be followed with a Soil Suitability Study for their project. § 5.5 As referenced above, the Appendices contain the documentation to support the applicable /55\ data and information found in this Report. ( J Page -6- Chesney Consulting