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C <br /> 01 March 2000 <br /> AGE-NC Project No 99-1828 <br /> IPage 2 of 8 <br /> Soil samples were collected from beneath the ends of each UST Six soil samples were collected <br />' beneath the fuel dispensers, and two soil samples were collected from the product line trenches In <br /> addition, six soil samples were collected from the stockpiled soil to be composited by the laboratory <br />' for analysis <br /> The soil samples were transported under chain-of-custody to McCatnpbell Analytical Laboratories, <br />' Inc (MAI) a State of California Department of Health Services (DHS)-certified laboratory in <br /> Pacheco, California and selected soil samples were analyzed for - <br />' Total petroleum hydrocarbons quantified as diesel and gasoline (TPH-g and TPH-d) In <br /> accordance with EPA Method 8015 Modified, <br /> • Aromatic hydrocarbons benzene, toluene, ethylbenzene, and total xylenes (BTEX) and <br />' methyl tert-butyl ether (MTBE) in accordance with EPA Method 8020 and <br /> • Fuel oxygenates including di-isopropyl ether (DIPE), ethyl tertiary-butyl ether (ETBE), <br />' MTBE, tertiary-amyl methyl ether(TAME) and tertiary-butyl alcohol (TBA) to accordance <br /> with EPA Method 8260 Modified <br /> lie A summary of soil analytical results are presented in Tables 1 and 2 <br />' TPH-d, TPH-g, BTEX and fuel additives were detected in the soil samples collected from the UST <br /> excavations TPH-g and BTEX were detected in one of the UST samples, two of the dispenser <br /> samples and at low concentrations in two of the stockpile samples TPH-d was detected in one of the <br />' UST soil samples, in all of the stockpile samples at low concentrations, and in all of the dispenser <br /> samples at variable concentrations <br />' TPI-1-d, TPH-g and BTEX were detected at high concentrations in soil samples D2, D3 and D5 from <br /> the former dispenser areas These soil samples exhibited significant staining and hydrocarbon odor <br /> 23 EXCAVATION OF HYDROCARBON-IMPACTED SOIL <br />' On 11 August 1999,three additional excavations were dug in the area of the former dispensers An <br /> additional 150 cubic yards of significantly petroleum-impacted soil was removed and stockpiled on <br />' site Excavation EXE1 was located in the southern dispenser island area, excavation EXE 2 was <br /> located at the central dispenser island area, and excavation EXE3 was located in the northern <br /> dispenser island area The total depth of the three excavations was eight feet°bsg The sidewalls and <br /> floor of the excavations EXE 2 and EXE 3 exposed hydrocarbon-impacted soil Hydrocarbon-stained <br /> • soil was not apparent in the final sidewalls and floor of excavation EXE1 <br /> Soil samples were collected from the excavation side walls at depths of 8 feet bsg and a soil sample <br /> Advanced CeoEnvironmental,Inc <br /> i <br />