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February 9, 2006 NOA Project Number: E05163A ' that were actually applied. According to Ms. Gallego,when a chemical for which a permit has been issued is applied to a field, a use report must be filed with the Agricultural Commissioner. The use reports do not include chemicals for which a permit is not required." According to EXTOXNET, diazinon is an organophosphate insecticide classified as slightly toxic to moderately toxic, depending on the formulation. Its average half-life in soil is two to four weeks. Diazinon has been detected in 54 wells in California. According to EXTOXNET,oxamyl is an carbamate insecticide classified as a highly toxic compound in EPA toxicity class I. Oxamyl is very highly toxic to birds, moderately to slightly toxic to fish, and highly toxic to bees. Oxamyl is of low persistence in soil with reported field half- lives of 4 to 20 days. Oxamyl has a residual period in plants of.approximately 1 to 2 weeks. It is considered non-toxic to plants. In a river water study, oxamyl had a half-life of 1 to 2 days. 3.1.5 Water Supply and Sewage Disposal System '. There is an agricultural well located on the subject property. No records were found on file for 2820 South Drais Road at EHD on December 7, 2005 nor January 17, 2006.. IM Depamnent of Oil, Gas, and Geothetmal Resources The California Department of Oil, Gas, and Geothermal Resources (DOGGR) well map W6-112 was reviewed for evidence of oil or gas wells on or in the vtcuuty of the subject property. No e wells are depicted within one-quarter mile of the subject property. i # 3.1.7 Site Reconnaissance A visual reconnaissance of the subject property was conducted on January 12, 2006. 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. The subject property was observed to be a flat rectangular parcel with an orchard. No structures were on the subject property. There was an agricultural well, an above-ground storage tank, and � several different types of pipe used for field irrigation on the south side of the property. The I ! southern and western boundaries of the property are defined by a drainage ditch. The northern boundary is defined by,a dirt road. The orchard continues on the eastern boundary onto the adjacent parcel. Three pole-mounted transformers were observed south of the subject property. r Personal Communication,December 28,2005. 12California Department of Oil,Gas,and Geothermal Resources,2006,well map W6-1. 7