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I 1 07 June 2004 AGE-NC Project No 02-0926 Page 3 of 11 ' 3 1 SOIL BORINGS ,On 17 October 2002 soil boring B4 was advanced at the site and the data was held for future reporting On 17 and 18 February 2004, B5 and B6 were advanced utilizing a van-mounted, ' Geoprobe 5400 direct-push probing unit equipped with 1 25-inch probing rods,for the collection and analysis of soil and `grab' groundwater samples Boring B5 was advanced using an attached 2 15- inch diameter soil sampler The probe boring 134,B5 and B6 were advanced to depths of 47 feet, 54 feet and 57 feet bsg, respectively Soil boring locations are depicted on Figure 2 3 1 1 Soil Sample Collection and Analysis ' Samples were collected from the borings B4 and B6 at discreet five-foot intervals using a 1 25-inch Geoprobe soil sampling assembly loaded with four six-inch brass sleeves All sampling equipment was washed in an Alconox solution and rinsed twice with water prior to each sampling run For each soil sample collected, both ends of the second or other selected sleeve were covered with Teflon sheets, capped and sealed with tape ' . Soil samples were collected continuously from boring B5,at four-foot intervals,beginning at ten feet below surface grade Continuous soil samples were retrieved using a Geoprobe four-foot macro core ' barrel loaded with one four-foot acetate sleeve Soil samples were preserved by covering both ends of a separated portion of the acetate sleeve with Teflon sheets, capping and sealing with tape ' All samples were labeled with the soil probeboring location,depth,time,date and sampler's initials, then stored on ice and transported under chain-of-custody to a State of California Department of Health Services (DHS)-certified analytical laboratory Selected samples were sent to either ' McCampbell Analytical Inc (MAI)or Cal Tech Environmental Laboratories(CTEL) and analyzed for • Total petroleum hydrocarbons as gasoline(TPH-g), diesel(TPH-d)and motor oil(TPH-mo) ' in accordance with EPA Method 8015 Modified, • Benzene, toluene, ethylbenzene and total xylenes (BTEX) and the volatile organic ' compounds methyl-tertiary-butyl ether(MTBE),tertiary butyl alcohol (TBA), di-isopropyl ether (DIPE), ethyl tertiary butyl ether (ETBE), tertiary amyl methyl ether (TAME), 1,2-dichloroethane (1,2-DCA) and 1,2-dibromo ethane (EDB) in accordance with EPA ' Method 8260, • Total lead in accordance with EPA Method 6010 Advanced GeoEnvironmental,Inc 1