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i �r 18 April 2000 `. AGE-NC Project No 98-0534 ' Page 2 of 9 ' UST were removed from the site by Dan Samuels Construction The approximate locations of the former USTs product piping and dispensers are shown of Figure 2 The former 20,000-gallon diesel UST (Tank 1) was located east of the two former 10,000-gallon ' diesel USTs (Tanks 2 and 3), at the south east corner of the two common UST excavations The former 20,000-gallon gasoline UST (Tank 4) was located east of the three 10,000-gallon gasoline USTs (Tanks 5, 6 and 7), and the 1,000-gallon w/o UST (Tank 8) was located at the western edge of the site The former fuel dispensers were located at the southern end of the site along the entrance to the site on Navy Drive ' Following removal of the USTs and collection of soil samples, the excavations were backfilled to surface grade with clean fill material ' During the UST removals, representatives of AGE collected a total of samples forty-two soil les from Y p ' beneath the USTs, product lines and dispenser area Soil samples were collected from beneath the ends of each UST and soil samples were also collected from below the center portions of the 20,000-gallon USTs Three soil samples were collected beneath the fuel dispenser A total of � . fourteen soil samples were collected from the product line trench, approximately one soil sample for every twenty linear feet of product line In addition, eighteen soil samples were collected from the stockpiled soil The soil samples were transported under chain-of-custody to McCampbell Analytical Laboratories, Inc (MAI) a State of California Department of Health Services (DHS)-certified laboratory in Pacheco, California, and selected soil samples were analyzed for the following u Total petroleum hydrocarbons quantified as diesel (TPH-d), total petroleum hydrocarbons quantified as gasoline (TPH-g) in accordance with EPA method 8015 modified, C Purgeable aromatic hydrocarbons benzene,toluene, ethylbenzene and total xylenes (BTEX) in accordance with EPA method 8020 and Fuel oxygenates, including methyl tert-butyl ether(MTBE), tertiary-butyl alcohol (TBA), di- isopropyl ether (DIPE), ethyl tertiary-butyl ether (ETBE) and tertiary-amyl methyl ether (TAME) in accordance with EPA Method 8260 modified A summary of soil sample analytical results are presented in Tables 1 and 2 Under direction from the PHS-EHD, four `grab' ground water sample were collected from the UST excavations for Tanks 1, 4, 5 and 6 The water samples from Tanks 1 and 4 were analyzed for . TPH-d TPH-g,BTEX and the fuel additives DIPE, ETBE, MTBE, TAME,TBA The water samples Advanced CeoEnvlronmental,Inc