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I30 December 2002 AGE-NC Protect No 02-0950 ' Page 3 of 7 ' 32 SOIL SAMPLE COLLECTION AND ANALYSIS Samples were collected from the bonugs at discreet five-foot intervals using a 1 125"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 The samples were labeled, stored on ice and transported under chain-of-custody to Cal Tech Environmental Laboratories (CTEL) a State of California ' Department of Health Services (DHS)-certified analytical laboratory Selected samples were analyzed for ' • Total petroleum hydrocarbons as gasoline(TPH-g)and as diesel(TPH-d)in accordance with EPA Method 8015 Modified, • Benzene,toluene,ethylbenzene and total xylenes(BTEX)and the fuel additives methyl-tert- Ibutyl ether (MTBE), tertiary butyl alcohol (TBA), di-isopropyl ether(DIPE), ethyl tertiary butyl ether(ETBE),tertiary amyl methyl ether(TAME),ethylene dibromide(EDB)and 1,2- l . dichloroethane (1,2-DCA) in accordance with EPA Method 8260 Modified, and, • Total lead in accordance with EPA Method 6010B 1 33 SOIL LOGGING IAfter sample preservation,soil was extruded from the remaining sleeves and field-screened utilizing an organic vapor analyzer (OVA) equipped with a photo-ionization detector (PID Thermo ' Environmental 580A, 10 0 eV,calibrated to isobutylene) The soil was also described in accordance with the Unified Soil Classification System Soil boring logs exhibiting soil profiles are depicted in Appendix A I 3 4 GRAB GROUND WATER COLLECTION AND ANALYSIS IAfter probing to a depth of 25 feet bsg, ground water was found to be at approximately 22 feet bsg A `grab' ground water sample was collected from each boring, the ground water sample was extracted by lowering an inertia pump down a temporarily installed,one-inch diameter PVC casing with a 5-foot long, 0 01-slotted well screen at the lower end Each ground water sample was transferred into three laboratory-supplied, 40-m1 volatile organic analysis (VOA) vials containing 0 5 ml hydrochloric acid(18%)as sample preservative,one laboratory-supplied, 1 liter amber bottle without sample preservative and one laboratory-supplied, 16-oz plastic bottle,containing 5 milliliters of nitric acid as a sample preservative After collection, the samples were properly labeled, placed Ada Ge• ironmental,Inc