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June 1,2005 NOA Project Number: E05058A According to EXTOXNET,Metolachlor is a slightly toxic compound classified in some products as an RUP. This chemical is slightly toxic to test animals via ingestion, and practically non-toxic by skin exposure. Metolachlor is moderately persistant in soils with a half-life of 15-70 days. In water,it is highly persistent in over a wide range of water acidity,and in sunlight is very stable. Its half life is more than 200 days in highly acid waters and 97 days in highly basic waters. According to EXTOXNET, Chlorothalonil is a broad-spectrum organochlorine fungicide classified in all products as an RUP.This chemical is slightly toxic to mammals,but can also cause severe eye and skin irritation in certain formulations.Very high doses may cause a loss of muscle coordination, rapid breathing,nose bleeding,vomiting,hyperactivity and death.This chemical is highly toxic to aquatic organisms. Chlorothalonil is moderately persistent in soils with a half life from 1-3 months. This chemical is very basic in water,and in 560 groundwater sampled collected from 556 U.S. sites has never been found. According to EXTOXNET, EPTC is a selective thiocarbamate herbicide classified as a slightly toxic compound in toxicity class III. This chemical is slightly toxic via ingestion and is a cholinesterase ` inhibitor. Severe inhibition of cholinesterase may cause slowed heartbeat, excessive fluid in the lungs,convulsions and coma. EPTC is of low persistence in the soil with a half life of 6 to 32 days. There is little chance that this chemical will enter surface waters due to its short half-life. a 3.1.5 Water Supply and Sewage Disposal System .i No wells or septic systems were observed on the subject property. The EHD well and septic permit files were searched on May 3, 2005 in an effort to obtain copies of permits for any water wells or septic tanks on the subject property;no permits were found. 3.1.6 Department of Oil, Gas, and Geothermal Resources The California Department of Oil, Gas, and Geothermal Resources (DOGGR) Wildcat Map 60612 was reviewed for evidence of oil or gas wells on or in the vicinity of the subject property. No wells are depicted within one-quarter mile of the subject property. 3.1.7 Site Reconnaissance A visual reconnaissance of the subject property was conducted on May 25,2005. Photographs of the subject property are attached to this report as Appendix B. A site visit/assessment checklist is attached to this report as Appendix D. 12 California Department of Oil,Gas,and Geothermal Resources,2005,Wildcat Map 606. 11 .,04