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Mr. Stephen R. Thumlert Siegfried Engineering, Inc. Page 2 of 4 known or potential hazards was also completed and is discussed later in this report. Mr. Lane also reviewed aerial photographs provided by the United States Department of Agriculture (early 1970s) and Mr. Taylor(1937, I947)for information regarding historical site uses. 2.0 PROPERTY DESCRIPTION 2.1 Site Description The subject property is located in the southern half of Sections 7 and 8, Township 2 North, Range 8 East, Mount Diablo Base and Meridian, in San Joaquin County, California. The parcel is currently used for agricultural purposes. One permanent structure is are located in the southeastern portion of l the property, a private residence identified as 6255 N. Tully Road. Approximately 120 acres has been planted to english walnuts and approximately 40 acres planted to wheat. The property has been used for agricultural purposes since the current owner bought the property in 1917. 2.2 Physical! Setting The site is situated on gently sloping terrain, ranging in elevation from approximately 70 to 77 feet above mean sea level. A copy of a partial topographic map (USGS 7 '/2 Minute Quadrangle, Clements, California) is included in Attachment B. No surface water bodies are located within the property boundaries. The southwest flowing Calaveras River is located approximately 2 miles northwest of the property. According to the U.S. Department of Agriculture's "Soil Survey of San Joaquin County, California," soil units at the property include Archerdale clay loam and Finrod clay loam. Excerpts from the USDA Soil Survey report that describe these soil types are included in Attachment C. 3.0 POTENTIAL ENVIRONMENTAL HAZARDS 3.1 Potential Non-point Sources of Hazardous Materials A variety of chemicals have been applied to the property over the past several years, including Goal 2XL, Round-up Ultra, Lorsban 50W, Miller Nu-Film-P, RNA Activator 85, Gramoxone Extra, Dipel DF, Lorsban 4E, Ambush Insecticide, Break Thru, Can 17, Kocide 2000 (Direx 4L), Manex, Thiosulfate, Surflan A.S., and calcium nitrate. The most recent Pesticide Use Reports (1999, 2000, portions of 2001) are included in Attachment D. The primary mode of application has been via ground application. Many of these compounds can cause chronic or acute human health affects if ingested, inhaled, or through prolonged dermal contact. However, they are formulated to degrade rapidly in the environment and are regularly used in the agriculture industry. 3.2 Potential Point Sources of Hazardous Materials No evidence of surface spilling, underground tanks, above ground tanks, or chemical storage areas were observed during the site reconnaissance. A copy of a Transaction Screen Questionnaire completed both by Mr. Taylor as property owner and occupant and by John Lane as site inspector, is included in Attachment E. Attachment E also includes an environmental database report for the daWgroundze/phasel/canepa.doc I