SITE INFORMATION AND CORRESPONDENCE

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GEOMATRIX northern portion of the former SOCo Vernalis crude oil pump station. The Vernalis Pump Station was part of the Wait-Mendota-Richmond crude oil pipeline system (also referred to as the Old Valley Pipeline [OVPL]),which operated at the site from approximately 1902 to 1935. The triangular-shaped site is bounded by the Union Pacific Railroad right-of-way and State Highway 33 to the northeast and Welty Road to the west (Figure 2). A Kinder-Morgan Energy Partners, L.P., petroleum product pipeline(gasoline,jet fuel, and diesel) is adjacent to the northern property boundary within the railroad right-of-way. Several farms lie to the west across Welty Road and east of State Highway 33. Light industrial properties (including the Enviropur-West Vernalis oil recycling facility) and farms are south of the property. 2.2 SITE HISTORY A Phase I site investigation was conducted in 1995 by Geological Technics, Inc., (Geological Technics,Inc, 1995). As described in the Phase I report, the site has been used for light industrial or agricultural purposes since the early 1900s. From 1902 to 1935 the site comprised the northern portion of the Vernalis crude oil pump station. The pump station was part of the OVPL system,which transported San Joaquin Valley crude oil from oil fields in Kern County to the SOCo Refinery in Richmond, California. Pump station facilities formerly located on site include the pipeline and a part of the heater house (Figure 2). Between 1935 and 1942, the property was owned by A.R. Rennie and Meridian Limited. In 1936, A.R. Rennie sold easement rights to Pacific Gas and Electric Company for a natural gas pipeline along the southern and western portions of the property; the pipeline was never installed (Geological Technics, Inc, 1995). In 1947, the property was sold to El Solyo Ranch Company, which established a labor camp that reportedly burned down in the early 1950s (Geological Technics, Inc, 1995). Charred building material remains at the site. Between 1947 and 1989, several other property owners used the site for agricultural purposes. The site currently is vacant. 2.3 PREVIDUS ASSESSMENTS Phase II site assessment activities were conducted at the site between 1994 and 1995 (Geological Technics, Inc, 1995). Phase II activities consisted of drilling two soil borings (SB-1 and SB-2)adjacent to the location of the former pipeline at depths between 35 and 37 feet below ground surface (bgs) (Figure 2). Soil samples collected between 11 and 32 feet bgs were analyzed for benzene,toluene, ethylbenzene, and xylenes(collectively referred to as BTEX) using EPA Method 8020; total petroleum hydrocarbons quantified as diesel (TPHd) using EPA Method 8015M; and total recoverable petroleum hydrocarbons(TRPH)using EPA Method 418.1 (samples from SB-2 only). Soil samples from boring SB-1 did not contain 115f31dep[da[a�oc_SafelS()OOs4541115I HILA Rp[.doc 2