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FC ThThefollowing chart summarizes the available Environmental Fate Data for the name and type <br /> agrichemicals that have been applied to the property for the past two seasons. Noted times <br /> of duration are near maximum values observed. The Fate Data is highly specific for various <br /> environmental conditions, and is normally expressed as half-lives in terms of days. <br /> PESTICIDE TYPE OF SOIL PERSISTENCE WATER <br /> APPLIED TO THE AGRICHEMICAL PERSISTENCE <br /> PROPERTY <br /> (Chemical Name) <br /> Asana Pyrethroid 15 days-3 mos. No threat to <br /> groundwater �> <br /> Dimethoate Organophosphate 4- 16+days Little threat to <br /> groundwater <br /> § 3.4 Description of all past off-site potential and/or known above and below ground sources of <br /> contamination identified in the area of the project site that has or may impact the project site <br /> have been referenced above in Section §3.1. In addition, nitrate contamination of the <br /> underlying groundwater may be a potential source of contamination due to the agricultural h `f <br /> production in this region. The likelihood of DBCP contamination is a possibility given the <br /> vineyard production in this locale. These two constituents (nitrate and DBCP)will be tested <br /> for the Soil Suitability Study, to be completed for this project. Soil data and information will <br /> also be provided in the Soil Suitability Study. As referenced, agricultural spray drift(non- <br /> target) from surrounding production land may contribute to above ground contamination of <br /> the subject property, although for relatively brief periods of time. Long-term persistent <br /> agrichemicals, namely DDT is probably found in the on-site soils, since it is found in <br /> virtually all San Joaquin Valley soils. Residual DDT that may be present within the on-site <br /> soils poses an insignificant risk to human health, and the environment. <br /> § 3.5 Description of all current off-site potential and/or known above and below ground sources of <br /> contamination identified in the area of the project site have also been referenced in Section <br /> §3.1. Future use of the project site will include one additional residential structure and <br /> continued row crop production. Protection of the on-site residential structures from ground <br /> or air-applied agrichemicals should be accomplished by spraying in the early morning hours <br /> when there is typically no wind. <br /> Page-6- <br /> Chesney Consulting <br />