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' 22 December 1998 . AGE-NC Project No 95-0128 ' Page 2 of 8 ' The soil probe boring locations are depicted in Figure 2 Advancement of the soil probe borings was accomplished utilizing AGE's van-mounted Geoprobe 5400, equipped with 1 125-inch diameter probe rods equipped with an attached 2 15-inch diameter soil sampler 2 2 SOIL AND GRAB GROUND WATER SAMPLE COLLECTION ' Discrete soil samples were collected at varyingde the utilizing a Geoprobe soil sampling assembly ' loaded with pre-cleaned 1 125-inch by 6-inch brass sleeves Soil samples were preserved by covering both ends of the second brass sleeve with Teflon sheets, capping and sealing with tape Upon preservation, each sample sleeve was labeled with soil probe boring location, depth,time, date and ' sampler's initials Ground water was encountered in each probe boring at a depth of approximately 30 feet bsg Grab ground water samples were collected from each soil probe boring (B 13 through B 19) at a depth of 35 feet bsg using 10 feet of a temporary PVC screen and 25 feet of a temporary PVC blank casing The probe rods were advanced four feet into the ground water,pulled out, and a screened casing was inserted into the saturated zone Ground water was allowed to enter the casing, and samples were retrieved using a modified PVC tubing bailer ' A deep grab water sample was collected from probe boring B 13 (B I3-H20B) at a depth of 60 feet bsg utilizing a Geoprobe water sampling assembly Upon collection, ground water samples were transferred into three 40-m1 EPA-approved VOA vials containing 0 5 ml 18% hydrochloric acid as ' a sample preservative and into a one-liter amber bottle without the preservative Each sample container was labeled with the sampling location, time, date and sampler's initials The samples were logged on a chain-of-custody form, stored in a chilled container and transported under chain-of-custody to McCampbell Analytical Inc (MAI), a California Department of Health ' Services (DHS)-certified laboratory The selected soil samples and each grab water sample were analyzed in accordance with • EPA Method 8015M for total petroleum hydrocarbons quantified as gasoline (TPH-g), • EPA Method 8015M for total petroleum hydrocarbons quantified as diesel (TPH-d), • EPA Method 8020 for volatile aromatics (benzene, toluene, ethylbenzene and xylene BTEX), • EPA Method 8260 and 8260M for volatile organic compounds (VOCs) and oxygenated fuel additives di-isopropyl ether (DIPS), ethyl tertiary butyl ether(ETBE), methyl-tertiary butyl ether (MTBE), tertiary butyl alcohol (TBA) and tertiary amyl methyl ether(TAME) Advanced GeoEns Eronmental Inc