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' Soil and Groundwater Investigation Work Plan
<br /> Vernalis Offsite April 2007
<br /> ' are also on the property. The Bogetti property is located down gradient from the pump station on the east
<br /> side of Highway 33. The Bogetti property is used for agricultural purposes.
<br /> 2.2 HISTORICAL AND ACTIVE PIPELINES
<br /> From 1902 to 1935, Standard Oil (predecessor to Chevron)operated the Vernalis Pump Station,which
<br /> was part of the former OVP system that transported heated crude oil from San Joaquin Valley oil fields in
<br /> ' Bakersfield to a refinery in Richmond, California. The OVP was located along the northeastern side of
<br /> the former Vernalis Pump Station and parallel to the Union Pacific Rail Road(UPRR)right of way
<br /> (ROW)and Highway 33.
<br /> ' Historical features at the former Vernalis Pump Station included a boiler house, a pump house, a sump, an
<br /> incinerator, a rubbish pit, cottages, and three bulk-storage tanks with secondary containment structures.
<br /> These surface structures were located on the Arcos property. Several pipelines entered the pump station
<br /> ' from the east corner of the Arcos property,conveying flows to the heater house and exiting to the north
<br /> across the Bellini property.
<br /> Located immediately southeast of the Arcos property is the former Tidewater Associated Oil Company
<br /> ' (TAOC)Ohm Pump Station. The TAOC pipeline was located on the east side of Highway 33 within the
<br /> UPRR ROW. According to a 1995 environmental site assessment,the former TAOC Ohm Pump Station
<br /> was owned by Vernalis Enviropur-West and was used for bulk storage of petroleum and oil products
<br /> ' (Geological Technics, 1995). The TAOC pipeline system was constructed in 1907, and like the OVP,
<br /> transmitted heated crude oil from Bakersfield to the Bay Area. The TAOC pipeline also utilized a crude
<br /> oil cutter stock, from the Coalinga area to a Bay Area refinery. The TAOC pipeline was abandoned in the
<br /> ' 1970s.
<br /> Currently,Kinder Morgan Energy Partners,L. P. (KM)maintains a high-pressure,petroleum-product
<br /> pipeline that reportedly transports gasoline,jet fuel, and diesel. The KM pipeline is located within the
<br /> ' UPRR ROW. According to a previous environmental site assessment, the KM pipeline was installed
<br /> approximately 4 to 5 feet below ground surface (bgs)during 1985,is constructed of 0.25 inch-thick
<br /> wrapped steel,and was under the control of a subsidiary of Southern Pacific Pipeline Company
<br /> ' (Geological Technics, 1995).
<br /> 2.3 EXISTING AND PLANNED DEVELOPMENT
<br /> The former Vernalis Pump Station is located in a rural and light-industrial area and is bordered by Welty
<br /> Road to the west,Highway 33 and UPRR tracks to the northwest, light-industrial facilities to the
<br /> southeast,and agricultural areas to the south. No plans for new development are known for the former
<br /> Vernalis Pump Station or the off-site Bogetti property,which is now used for agricultural purposes.
<br /> ' 2.4 PREVIOUS ENVIRONMENTAL ACTIVITIES
<br /> Bellini Property
<br /> ' Preliminary Environmental Site Assessment(Geological Technics, 1995). Geological Technics
<br /> performed a Preliminary Environmental Site Assessment that included a review of public records and
<br /> aerial photographs,a site reconnaissance,personal interviews, and a subsurface investigation. On January
<br /> ' 20, 1995, Osterberg and Stewart,Inc.,under the supervision of Geological Technics,drilled soil borings
<br /> SB-1 and SB-2. Total extractable petroleum hydrocarbons were detected in soil samples collected from
<br /> SB-2 at concentrations ranging from 11,800 milligrams per kilogram (mg/kg)to 17,200 mg/kg. In
<br /> ' addition,total recoverable petroleum hydrocarbons were detected in the soil sample collected from SB-2
<br /> at a concentration of 17,600 mg/kg.
<br /> ' Preliminary Site Investigation Work Plan:Roberts Property(Radian International,LLC [Radian],
<br /> 1998). In July of 1998,Gregg Drilling and Testing, Inc. (Gregg Drilling),under the supervision of
<br /> Radian, drilled six soil borings(SB-3 through SB-8) and installed four groundwater monitoring wells
<br /> (MW-1 through MW-4). TPH quantified as diesel (TPHd) and TPH quantified as motor oil (TPHmo)
<br /> ' ..M►^R%. Cl
<br /> From Science to Solutions
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