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PESTICIDE APPLIED TYPE SOIL WATER <br /> TO THE PROPERTY PERSISTENCE PERSISTENCE <br /> Asana Pyrethroid Insecticide 15 - 90 days 21 days <br /> Dimethoate Insecticide 5 - 21 days Immediate hydrolysis <br /> Matrix Herbicide Unknown Unknown <br /> Ethrel Insecticide 1 - 3 days 2 days <br /> Sevin Insecticide 11 - 141 days 3.5 -20 days <br /> (RoundUp) Herbicide 1 - 174 days 12 - 70 days <br /> Glyphosate <br /> //The predominate wind direction through the region is east-southeast. West-northwest, or <br /> upgradient wind shed is composed of agricultural production land including pasture and orchards. <br /> This wind direction, along with the fact that agrichemicals cannot be applied during windy <br /> conditions, ensure that the likelihood of impact to the property from unintended pesticide drift is <br /> somewhat unlikely. <br /> VI. CONCLUSIONS AND RECOMMENDATIONS <br /> i <br /> From visual observations, there is no surface contamination from hazardous materials or hazardous <br /> environmental conditions. The items discussed and observed may be considered de minimus <br /> environmental concerns. The future uses of the property include resi ential,for the existing <br /> idential ctnir tare an l a 'rte It iral production...for-Alle.zernainder of the property. <br /> The ASTM E-1527-00 Document referenced on Page 2 refers to de minimus environmental <br /> conditions. De minimus conditions generally do not present a material risk to public health or to the <br /> environment and generally would not include an enforcement action if observed by the appropriate <br /> governmental agencies. Household hazardous materials may be considered de minimus concerns if <br /> there has been no spillage or dumping. Spillage and dumping of a hazardous substance was not <br /> observed. The private homesites on, and surrounding the property may contain lead paint, asbestos <br /> or]tazardous materials that may or may not be typical. Typical household "hazardous materials" <br /> include pesticide sprays, gasoline, paint thinners, new and used motor oil, antifreeze, etc. <br /> Section 9-905.12 of San Joaquin County Development Title states "Corrective Action: If the report <br /> indicates there are surface and subsurface contamination, corrective action shall be recommended in <br /> the report and concurred with by Environmental Health prior to the issuance of the building permit." <br /> Therefore, it is my professional opinion that no corrective action is required on the three proposed <br /> Parcels that are to compose the subject property. <br /> Page -6- <br /> Chesney <br /> a e -6- <br /> Chesney Consulting <br />