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c <br /> 15 October 1997 <br /> AGE-NG Project-No: 960232 <br /> Page 2 of 5 R <br /> '13'. SOIL SAMPLE COLLECTION s <br /> Discrete soil samples were continuously cored.from P-1'and P-2°utilizing a'Geoprobe:Macro-core <br /> sainplerwith 3.6-inch acetate sleeves;,soil samples were continuously,cored from P=3 utilizing'a 60- . <br /> 1� inch`macro=core sampler: Discrete soil samples were collected from P-4 at 5400t intervals beginning <br /> at a depth`of l0:feet bsg utilizing a California.split=spoon sampler and'pre-cleaned 2-inch by 6-inch <br /> -brass,sleeves. Discrete soil samples were collected from P=5 atfive-foot intervals beginning,at a depth <br />' <br /> of.10 feet bsg utilizin ,a Geo robe soil s_am lin 'assembl loaded'with re-clearied-1,125-inch b 6; <br /> g p . _ p g Y .p Y <br /> inch brass sleeves., <br /> Selected soil samples were preserved frorli'P-1 through P-S by covering both ends of a 6=inch sleeve <br /> section with Teflon.sheets'and plastic•end'.caps and sealing'with,duct tape. Preserved sample sleeves <br /> were labeled with sample location; depth, time,date and sampler's initials. The samples':were placed <br /> in a chilled container'and transported under chain-of-custody-to McCampbell Analytical Incorporated' s <br /> (MAI),-a California state-certified laboratory. Selected.soil'samples.were analyzed for methyl=tertiary <br /> ' 'but 1 ether TBE),-tertiatertiary 1 alcohol,(TBA), 41-isopropyl ether ( llE), ethyl tertiarY butyl ether. <br /> (ETBE) and tertiary amyl methyl-ether (TA ffi) in accordance with EPA method 8260. <br /> 2.4. GROUND WATER SAMPLE COLLECTION <br /> Grab ground water samples were collected from P-I throe h P-5 utilizin a h 'dro unch technology. <br /> S g . Y p . gY <br /> f A hydro-punch water assembly was advanced to a depth just above the watertabie utilizing hollow <br /> steel rods, and Ariven past the lead'auger bit into undisturbed:materials approximately,five feet-below ' <br /> the water'table. The hollow steel rods were then retracted upward a0proximately five.feet, thereby <br /> eby <br /> exposing a' tainless steel screen to ground water. 'A,baile'r with new nylon rope,was manually,inserted. <br /> through the'hollow•steel rods and into the exposed-screen,''and a grab :water sample 'collected. <br /> Sufficient'sample.was collected fronf each soil boring to fill.at least one 40-mI EPA-approved'VOA <br /> vials containing 0.5 ml. 1,8%-hydrochloric acid as'a preservative. Ground water sample:containers::.' <br /> were labeled with sample location;:date,time, and`,samplers initials. <br /> "Following collection and labeling of each grab ground'•water.'sample,'the, sample was immediately.' <br /> placed in a chilled,container. Each sahiple,was logged on a chain-6tform and transported: ' <br /> '. to MAI for•analysis of MT'BE;'TBA;'DIPE, ETBE and TAME in accordance with.EPAnnethod-.- <br /> 8260. - <br /> 2.5. .. BORING LOGS <br /> During'drilling•activities, descriptions of sample duplicates were recorded on•boring-logs using the <br /> Advanced GeoEnvironnnental,Inc.' <br />