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7.4 Agricultural Commissioner's Records The San Joaquin County Agricultural Commissioner's Office was contacted regarding any agricultural use of the Site. Chemical use reports were identified for the Site under the names of Gerard Eger and Round Valley Ranches. According to the records, 40 to 47 acres of the Site were used for growing olives from 2006 through the present. Use reports were only identified for 2010 and 2011. The following products were reportedly applied to the olive orchard on the Site from 2010 through the present: Product Name Active Ingredient 2010 2011 Cuprous oxide Cuprous oxide X Foli-Gro Calcium Calcium X Foli-Gro Boron Boron X Buccaneer Plus Glyphosate, X isopropylamime salt Rely 280 Glufosinate- X ammonium ZP Rodent Bait Zinc phosphide X Nordox Cuprous oxide X Two of the chemicals applied to the Site are included on the US EPA's list of Restricted Use Products (2002). Additional information on these chemicals is presented below. Cuprous oxide is an inorganic fungicide. Copper compounds in dust and powder forms are irritating to the eyes, skin, and respiratory tract. They are toxic by ingestion to humans and livestock (US EPA, 1999). Zinc phosphide is an inorganic chemical used primarily as a rodent bait. Depending on the formulation of the product, it may be slightly to highly toxic. Zinc phosphide is broken down by the acidity in soil to form phosphine, a highly toxic gas (EXTOXNET, 1993) Copies of the Agricultural Commissioner's records are included in Appendix 4. 7.5 Department of Oil, Gas, and Geothermal Resources Maas The California Department of Oil, Gas, and Geothermal Resources (DOGGR) Online Mapping System (DOMS) was queried on September 27, 2011 for mapped oil or gas wells within one-quarter mile of the subject Site. No wells were identified. LOGE1025 Page 6