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i <br /> GeoStrategies Inc. <br /> i UNOCAL Corporation <br /> September 11, 1992 <br /> Page 3 <br /> SOIL SAMPLING AND ANALYTICAL RESULTS <br /> Tank Complex <br /> Samples UX-1 through UX-4 were collected from the bottom of the UST <br /> i excavation Samples UX-1, UX-3 and UX-4 were collected at a depth of <br /> approximately lb feet below grade and sample UX-2 was collected at <br /> approximately 15 5 feet below grade The locations of these samples are shown <br /> on Plate 3 and sample collection depths are presented in Table 1 <br /> These samples were analyzed for Total Petroleum Hydrocarbons calculated as <br /> i Gasoline (TPH-Gasoline) according to EPA Method 8015 (Modified), benzene, <br /> toluene, ethylbenzene and xylenes (BTEX) according to EPA Method 8020, total <br /> lead by Atomic Absorption according to EPA Method 7420 and 1,2 - <br /> Dibromoethane (EDB) according to EPA Method 8240 <br /> TPH-Gasoline, BTEX and EDB were reported as not detected (ND) for samples <br /> UX-1 through UX-4 Total lead concentrations varied from ND for sample UX- <br /> 4 to 6 6 parts per million (ppm) for sample UX-1. Chemical analytical data are <br /> summarized in Table 1 <br /> Waste Oil Tanks <br /> Sample UW-1 was collected from the bottom of the 280-gallon waste oil tank <br /> excavation at a depth of approximately 10 feet below grade The location of <br /> this sample is shown on Plate 3 and the sample collection depth is presented in <br /> Table 1 <br /> Composite sample UW-2A-B was collected from the bottom of the 130-gallon <br /> unknown waste oil tank excavation at a depth of approximately 6 feet below <br /> grade The location of this sample is shown on Plate 3 and the sample <br /> collection depth is presented in Table 1 <br /> Both samples collected were analyzed for TPH-Gasoline, BTEX, Total Petroleum <br /> Hydrocarbons calculated as Diesel (TPH-Diesel) and Oil (TPH-Oil) according to <br /> EPA Method 8015 (Modified), Oil and Grease (O&G) according to ASTM <br /> Method 5520 E&F, Halogenated Solvents (CL HC) according to EPA Method <br /> 8010, ICAP Metals by Atomic Absorption according to EPA Method 7000 and <br /> PCBs according to EPA Method 8270 <br /> TPH-Gasoline, TPH--Diesel, TPH-Oil, O&G, BTEX and PCBs were reported as <br /> ND for samples UW-1 and UW-2A-B Chemical analytical data are summarizer) <br /> in Tables 1 and 3 <br /> 782701-1 <br /> i <br />