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i <br /> GEOMATRIX <br /> east comer of the Arcos property,conveying flows to the heater house and exiting to the north <br /> across the Bellini property. <br /> Site history from an environmental site assessment(ESA)previously conducted at the <br /> 35500 Welty Road property (currently the Bellini property) (Geological Technics, 1995) is <br /> l summarized below. The 35500 Welty Road property was sold to A. R. Rennie after 1935. <br /> A. R. Rennie sold easement rights to the Pacific Gas and Electric Company for the installation <br /> of a natural gas pipeline along the southern and western portions of the property. There was no <br /> information indicating whether the pipeline was installed. In 1947, the ownership of the <br /> 35500 Welty Road property reportedly was transferred to the El Solyo Ranch Company who <br /> established a work camp, which later burned down in about 1951. The property reportedly has <br /> been vacant since then. After the El Solyo Ranch Company, the property was owned by <br /> 1 Dale Brinkman, Robert Roberts,and subsequently the Bellinis. A nursery operation reportedly <br /> J was located within the 35500 Welty Road property for a short period of time. During the site <br /> } reconnaissance of the 1995 ESA, a removed underground storage tank reportedly was observed <br /> } on the"property to the south"; however, it was not evident where the tank had originated. <br /> 1.2 SITE SETTING AND VICINITY USE <br /> 111 The Bellini property is a triangular shaped, 5.73-acre vacant property. The Arcos property is <br /> L� irregularly shaped and located immediately to the south of the Bellini property. The Arcos <br /> property is currently utilized as a storage facility for equipment and materials and contains a <br /> residence and an on-site office. <br /> The site is located on Welty Road in a rural area used for light industrial/agricultural activities. <br /> The site is bounded to the northeast by the Union Pacific (formerly Southern Pacific)railroad <br /> right-of-way and State Highway 33 (Figure 2). A Kinder Morgan Energy Partners,L.P., <br /> t high-pressure petroleum-product pipeline that reportedly transports gasoline,jet fuel, and diesel <br /> Iis located along and outside of the northeastern site boundary within the Union Pacific right-of- <br /> way. According to the ESA(Geological Technics, 1995), the product pipeline was installed <br /> approximately 4 to 5 feet below ground surface(bgs) in about 1985, is constructed of 1/a-inch <br /> wrapped steel, and was under the control of a subsidiary of Southern Pacific Pipeline Company. <br /> - Properties to the east and west are primarily used for agricultural purposes with some limited <br /> residential use. Light industrial properties and farms are located to the south of the site. The <br /> property located immediately southeast of the Arcos property was a former Tidewater <br /> Associated Oil Company(TAOC) (predecessor to Texaco and now ChevronTexaco)pump <br /> [APROJEC15000s15011.00015011-03.dm 2 <br />