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6. ` January 24, 2006 NOA Project Number: E05165A r• According to EXTOXNET, aluminum phosphide is an inorganic phosphide used to control insects and rodents in a variety of settings. Aluminum phosphide rapidly reacts with water to form highly toxic phosphine gas. It has been reported that aluminum phosphide may be absorbed directly into �•. the bloodstream,although this is probably a very minor-route of entry.Aluminum phosphide will breakdown spontaneously in the presence of water to forhi a gaseous product,and so it is non- persistent and non-mobile in the soil environment, and poses no risk to groundwater. 6. According to EXTOXNET, Methidathion is a non-systemic organophosphorous insecticide classified as a Restricted Use Pesticide. Effects due to acute methidathion exposures may include nausea,vomiting, crams diarrhea salivation headache dizziness muscle twitching,difficulty cramps, g� breathing,blurred vision,and tightness in the chest. High acute exposure may cause intense breathing problems,including paralysis of the respiratory muscles. Methidathion is highly toxic to '' birds,bees and aquatic organisms. It is of low persistence in the soil environment;reported field half-lives are 5 to 23 days. There is little chance that this chemical will enter surface waters due to its short half-life. Methidathion and its breakdown products are poorly bound by soils, and so may be b' mobile. However, they have not been detected in any groundwater sources. v According to EXTOXNET,diphacinone is an highly toxic compound in EPA Toxicity Class I. Diphacinone is a rodenticide bait used for control of rats,mice,voles,and other rodents. Diphacinone is highly toxic by ingestion. No permanent or life-threatening effects occurred in un humans on recommended dose regimes of an initial 20 mg dose, followed by successive 2 to 4 mg daily doses for several days to weeks. 3.L6 W7 er Supply and Sewage Disposal System ( / One well, s located on the subject property. The location of this well is indicated on the site map (Appendix A). Mr. McManis indicated during the site visit on January 12,2006 that there is no septic system on the subject property. r. The EHD well and septic permit files were searched on December 7,2005 in an effort to obtain copies of permits for any water wells or septic tanks on the subject property;several permits were found,many r. are for the adjacent winery that shares the site address (See Appendix F). tim Wn ►. 10 bw "004 VW