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According to SJCEHD files, a 525-gallon gasoline UST was removed from the property in 1990, <br />' with TPH-G detected in a soil sample collected from the base of the excavation at a <br /> concentration of 300 ppm In June 1997, a soil boring was advanced in the center of the <br /> excavation to a depth of 10 feet bsg, with groundwater encountered at a depth of 9 7 feet bsg <br /> (Upgradient Environmental Consultants, 1997) The results of soil and groundwater samples <br /> collected from the boring did not encounter any petroleum hydrocarbon analytes The SJCEHD <br /> subsequently issued a no further action letter in December 1997 <br /> rNo records were located in the SJCEHD records pertaining to the diesel leak identified in the <br /> EDR report It is possible that the chemical of concern (gasoline) was misidentified as diesel in <br /> information supplied to the LUST database <br /> Former Chevron Service Station <br /> The former Chevron Service Station (also identified as 90959 in the EDR report) is located <br /> approximately 450 feet to the southwest of the site, at the intersection of Adam Street and West <br /> 11'h Street (Photograph 11) The property is listed in the LUST database, as well as the Cortese <br /> lie <br /> FID databases and historical UST databases <br /> According to the historical UST database, a 5,000-gallon and two 10,000-gallon USTs <br /> containing product and a 55-gallon UST containing waste oil were installed in 1977 The site is <br /> listed as closed in the LUST database <br /> Records located at the SJCEHD state that in January 1992, a 550-gallon waste oil UST was <br />' removed from the property In July 1993, one 5,000-gallon and two 10,000-gallon gasoline <br /> USTs were removed At that time, five additional USTs of unknown size and contents were <br />' removed (Cambria, 1996) Soil samples collected from the various tank excavations and <br /> subsequent soil borings were reported to contain TPH-G and TPH-D concentrations up to 3,900 <br />' ppm and 260 ppm respectively <br /> A total of five monitoring wells were installed on the property and along Adam Street in <br /> December 1992 and sampled up through December 1996 (Gettler- Ryan Inc , 1997) The results <br /> of the monitoring program indicated groundwater gradient was generally directed to the <br /> CNCD104-28-031S1-IARE%US7103-0027 doe g <br />