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19 June 2001 <br /> AGE-NC Project No 97-0326 <br /> Page 2 of 7 <br /> program utilized the SBT Soil Behavior Type(Robertson, 1990),to generate a general lithology type <br /> and display on a CPT boring log(See Appendix A) Rinseate generated during drilling activities was <br /> containerized in properly labeled DOT-approved 55-gallon drums, and stored on-site in an area <br /> lacking public access All soil borings were backfilled over their entire depth with a portland cement <br /> grout mix <br />' 2 2 CPT DRILLING AND GROUND WATER/SOIL COLLECTION PROCEDURES <br />' Grab ground water and soil samples were collected with the 25-ton truck-mounted CPT drill rig <br /> equipped with 1 75-inch diameter hollow-stem rods fitted with a HydroPunch ground water or a soil <br /> sampling tool which is pushed to the specified sampling depth in each soil boring Samples were <br />' collected in a twin boring advanced near the initial CPT boring in the area <br /> Ground water or soil samples were collected from specified depth intervals(zones)based on the just <br />' previously acquired CPT-lithology data indicating favorable conditions for sampling For ground <br /> water, a HydroPunch sampling tool was pushed into the specified zone, then withdrawn <br /> approximately four feet to expose an inlet screen, the interior of the sampling tool filled with water <br /> and a 1-inch outer diameter(O D )stainless steel bailer was lowered and utilized to extract a ground <br /> water sample For soil, a steel-tipped soil sampler is pushed into the specified zone, then the tip is <br /> withdrawn to expose a core barrel,the sampler is pushed down again to retrieve a 1-foot soil sample <br />' All rinseate generated during drilling activities was containerized in properly labeled DOT-approved <br /> 55-gallon drums, and was stored on-site in an area lacking public access All soil borings were <br />' backfilled over their entire depth with a portland cement grout mix <br /> Following collection, the samples were properly labeled, placed in laboratory-supplied containers <br />' and transported under chain-of-custody to McCampbell Analytical Inc (MAI), a California <br /> Department of Health Services (DHS)-certified laboratory Samples were analyzed for <br />' • Total petroleum hydrocarbons quantified as gasoline (TPH-g) in accordance with EPA <br /> Methods 5030 and 8015 Modified <br />' • Volatile aromatic hydrocarbons-benzene,toluene, ethylbenzene and total xylenes(BTEX) <br /> with methyl tertiary-butyl ether(MTBE) in accordance with EPA Method 8020 <br />' • Oxygenated volatile organics-di-isopropyl ether(RIPE), ethyl tertiary-butyl ether(ETBE), <br /> MTBE, tertiary-amyl methyl ether(TAME), tertiary butanol (TBA), methanol and ethanol <br /> in accordance with EPA Method 8260B <br /> Advanced GeoEnvrronmental,Inc <br />