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' 08 August 2005 <br /> • AGE-NC Project No 98-0534 <br />' Page 2 of 15 <br /> former USTs, product piping and dispensers are shown of Figure 2 <br /> The former 20,000-gallon diesel UST (Tank 1) was located east of the two former 10,000-gallon <br /> 1 diesel USTs (Tanks 2 and 3), at the south east corner of the two common UST excavations The <br /> former 20,000-gallon gasoline UST (Tank 4) was located east of the three 10,000-gallon gasoline <br /> USTs (Tanks 5, 6 and 7), and the 1,000-gallon waste oil UST (Tank 8) was located at the western <br /> edge of the site The former fuel dispensers were located at the southern end of the site along the site <br /> entrance on Navy Drive <br /> 9 <br />' During the UST removals, petroleum odors and visible stains were observed by AGE personnel A <br /> total of forty-two soil samples were collected from beneath the USTs, product lines and dispenser <br /> areas Soil samples were collected from beneath the ends of each UST and soil samples were also <br /> collected from below the center portions of the 20,000-gallon USTs Three soil samples were <br /> collected beneath the fuel dispenser A total of fourteen soil samples were collected from the product <br /> line trench, approximately one soil sample for every twenty linear feet of product line In addition, <br /> eighteen soil samples were collected from the stockpiled soil Following removal of the USTs and <br /> collection of soil samples,the excavations were backfilled to surface grade with clean fill material <br />' The soil samples were transported under chain-of-custody to McCampbell 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 the following <br /> • Total petroleum hydrocarbons quantified as diesel (TPH-d), total petroleum hydrocarbons <br /> quantified as gasoline (TPH-g) in accordance with EPA method 8015 modified, <br /> Purgeable aromatic hydrocarbons benzene,toluene,ethylbenzene and total xylenes (BTEX) <br /> in accordance with EPA method 8020 and <br />' a Fuel oxygenates,including methyl tert-butyl ether(MTBE),tertiary-butyl alcohol(TBA), di- <br /> isopropyl ether (DIPE), ethyl tertiary-butyl ether (ETBE) and tertiary-amyl methyl ether <br />' (TAME) In accordance with EPA Method 8260 modified <br /> Under direction from the EHD, four `grab' ground water samples were collected from the UST <br />' excavations for Tanks 1, 4, 5 and 6 The water samples from Tanks 1 and 4 were analyzed for <br /> TPH-d,TPHKd <br /> TEX and the fuel additives DIPE,ETBE,MTBE,TAME,TBA The water samples <br /> from Tanks 5 were analyzed for TPH-g, BTEX compounds and the fuel additives DIPE, <br />' ETBE, MTBE, TAME, TBAN4�oti <br /> �1 <br /> 1 <br />' Advanced GeoEnvironmental,Inc <br /> 1 <br />