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INTRODUCTION Mr. John Trinkle is purchasing the investigated property for this report, which is currently owned by Thomsen Brothers, Inc. Farming Company, and he intends to subdivide the property into three separate parcels. Schack& Company of Tracy, CA are the civil engineers for the project. The purpose of this project is to create a ramp and runway, aircraft hangers, an office and rel ed_ improvements for the Trinkle and Bays, Inc. Agricultural Flying Service. This will be on proposed Parcel 1. Proposed Pa*ce12 is to be a homesite narceL The remaining property is the "Designated Remainder." According to the San Joaquin County Development Title, a Surface and Subsurface Contamination Report (SSCR)must be conducted before Tentative Map submittal. The purpose of this report was to investigate the subject property for real or potential environmental contamination and report the findings exclusively to the Client and the San Joaquin County Environmental Health Department. This report complies with the San Joaquin County Ordinance, specifically 9-905.12(a) for a "Surface and Subsurface Contamination Report." In addition, this report addresses and evaluates non-point sources of hazardous materials, as well as potential point sources. Non-point sources of hazardous materials include agricultural chemical residues, high concentration of nitrate laden groundwater and other contaminants which may have originated from a wide area. Point sources investigated include fuel storage tanks, septic systems and/or chemical storage areas. No chemical analysis was conducted for this investigation, and no structures were inspected for asbestos containing materials (ACMs). An analysis of the on-site domestic well in the southwest corner of proposed Parcel 1 has not been tested yet for nitrates and the agrichemical dibromochlorpropane (DBCP). SITE DESCRIPTION As illustrated on the attached Tentative Map, Parcel 1, Parcel 2 and the Designated Remainder consists of a flat, trapezoid-shaped area, with Parcel 1 to be 52.9 acres, Parcell to be 4.1 acres and the Designated Remainder to be 240.fisgres There are three mobile homes for farm workers, two of which are on the subject property, along with an existing hay barn. An agricultural implement storage area with an above ground diesel storage tank is west of the mobile homes. The entire acreage was planted in wheat. The subject site address and A.P.N. are referenced above on the Title Page. To the north and south, the site is bordered by agricultural production land, primarily row crops and pasture. To the west is Interstate 5 and to the east is the Duel Vocational Institute Prison, which is in alfalfa directly across from Kasson Road. There is extremely low density single family housing and the subject property is zoned AG 40. Page -1- Na(ley Ag Research