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Kennedy/Jenks Consultants
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<br />2.3.1 Offsite Information
<br />The EDR Report identified two offsite diesel underground storage tanks (USTs), including one
<br />1,000-gallon UST at the Pinasco Plumbing property north of the Site along East Taylor Street
<br />(cross gradient; reportedly closed) and one 500-gallon UST at the Clark Well and Equipment
<br />Company located more than 1/4-mile south of the Site, south of a slough (unlikely to be
<br />upgradient). The two properties that border the Site include the Stockton Tri Industries Inc.
<br />property (west of Diamond Street) and the Diamond Foods, Inc. property (east of Diamond
<br />Street). The EDR Report indicated that the Stockton Tri Industries Inc. property had a
<br />600-gallon UST (now closed) and they have had various chemicals stored on property, noting
<br />the presence of unspecified oil-containing waste that was to be incinerated or used as fuel
<br />(3.75 tons specified). The EDR Report indicated the Diamond Foods, Inc. property had a diesel
<br />release of 3 gallons; USTs were not identified in the EDR Report.
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<br />2.3.2 Onsite Information
<br />The EDR Report and the Site file review identified five tanks associated with past fueling
<br />operations at the Site; details for the tanks are summarized in Table 1 based on the EDR Report
<br />and other Site files. Reportedly, two tanks stored diesel fuel, one stored oily waste from the
<br />diesel fueling service, and two stored gasoline. Most documentation indicates the tanks were
<br />generally classified as USTs although some descriptions and notes imply some may have been
<br />partially or completely above grade. The first diesel tank had a capacity of 26,000 gallons, was
<br />reportedly constructed out of railcars welded together, was installed in 1949, and was removed
<br />in 1990. The second diesel tank had a capacity of 100 gallons, was noted as being a "stand-by
<br />generator" and appears to have no record of having been closed, which may indicate it was an
<br />aboveground tank and may have been portable. The oily waste tank had a capacity of
<br />10,000 gallons (one source cited approximately 12,000 gallons), was a buried tank car, was
<br />installed in 1976, and was removed in 1990. The first of two gasoline tanks had a capacity of
<br />2,000 gallons, its construction is unspecified, it was installed in 1974, and it was removed in
<br />1990. The second gasoline tank was a 55-gallon drum and was removed in 1989; installation
<br />date was unspecified. The former locations of the larger tanks (26,000-gallon diesel,
<br />10,000-gallon oily waste, and 2,000-gallon gasoline) were provided in the 1991 tank closure
<br />report, are provided on Figure 2, and are discussed in greater detail below; the former locations
<br />of the other two tanks are unknown.
<br />The former 26,000-gallon diesel, 10,000-gallon oily waste (historically and herein referred to as
<br />a wastewater tank 2 ), and 2,000-gallon gasoline tanks were reported in detail in the following two
<br />(of five) documents reviewed in the BNSF files, which are included as Appendix A:
<br />Environmental Solutions, Inc. (ESI) 1991. Tank Closure Report Three Underground Storage
<br />Tanks, Stockton Railyard and Fueling Facility, January 1991.
<br />San Joaquin County Public Health Services (SJPHS). 1996. Case Closure Summary Santa
<br />Fe Railway. 2 January 1996.
<br />2 ESI (1991) notes the 10,000-gallon UST and line to be related to wastewater. The EDR noted a 10,000 to
<br />12,000-gallon oil UST was installed in the late 1970s, and SJPHS (1996) notes a 10,000-gallon waste oil tank was
<br />removed. Although size and content descriptions differ, it appears all descriptions are regarding the same
<br />10,000-gallon UST.
<br />High Resolution Site Characterization Work Plan,
<br />BNSF Mormon Yard, Stockton, California Page 3
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