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July 21, 1999 NOA ENVIRONMENTAL.PROJECT NUMBER E99130 San Joaquin County Fire Prevention handles underground storage tank removal permits that date back to 1987. According to Mr. Steve Dalton at San Joaquin County Fire Prevention, they have no underground storage tank removal records for the subject property. 4. San Joaquin County Agricultural Commissioner The San Joaquin County Agricultural Commissioner's Office was contacted in writing and by telephone in an effort to obtain information relative to the types of agricultural chemicals that have been used on the subject property. The Agricultural Commissioner's Office maintains records back to 1994 for agricultural chemicals that have been permitted for use on properties in San Joaquin County. The records received from the Agricultural Commissioner's Office relative to the subject property are attached to this report as Appendix C. According to the records at the Agricultural Commissioner's Office, the following agricultural chemicals have been permitted for use on the subject property from 1994 through 1999: SLN Metasystox, Methomyl, Aluminum Phosphate, Strychnine, MCPA, Dimethyla, 2,4-D Amine, Paraquat, Permethrin, Asana, Diazinon, Sevin, Dicamba, Di-Syston, Guthion, Vydate, and non- permitted agricultural chemicals. According to Mr. Dan Gesing, Inspector at the Agricultural Commissioner's Office, many times agricultural chemicals are permitted for use on properties but are not necessarily used by the owner or the grower on those properties. The Agricultural Commissioner's Office has "Pesticide Use Reports" that are submitted by the grower to their office for the agricultural chemicals that are actually used on the property. The Agricultural Commissioner's Office records include "Pesticide Use Reports" for the years 1995 through 1998 which indicate that Lannate, Banvel, Zeneca Ambush, Nufilm P, RNA Activator 85, Sprayaide, Accent SP herbicide, and Poast have been the agricultural chemicals reported to their office to have been used on the subject property. The following is a summary of the toxicity and soil half-life of the agricultural chemicals reported to have been used on the subject property [EXTOXNET, Extension Toxicology Network, Pesticide Information Notebook, A pesticide information project of the Cooperative Extension Offices of Cornell University, Michigan State University, Oregon State University and the University of California at Davis, 1994; and Crop Protection Chemicals Reference, Chemical and Pharmaceutical Publishing Corp., 1988]: Lannate(also known as Methomyl): Methomyl is a broad spectrum insecticide. It is potentially a highly poisonous material in humans. It is not considered to be a carcinogen,teratogen or mutagen. It is rapidly degraded by soil microbes. Its soil half-life is three to six weeks. Because of it high solubility in water and its soil half-life, methomyl may have potential for groundwater contamination. 7