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14 September 2000 <br /> AGE-NC Project No. 00-0746 <br /> Page 2 of 3 <br /> 3.2. Soil Sample Collection <br /> Discrete soil samples were collected from borings B-1 through B-3 at 5-foot intervals,beginning at <br /> 5 feet bsg,to total depth of each boring. Soil samples were collected using a Geoprobe soil sampling <br /> assembly loaded with four pre-cleaned 1.125-inch by 6-inch brass sleeves. Soil samples were <br /> preserved by covering both ends of the brass sleeve with Teflon sheets, capping, and sealing with <br /> tape.Each sample sleeve was labeled with soil probe boring location,depth,time, date and sampler's <br /> initials. <br /> Soil samples from HA-1 through HA-25 were collected utilizing a 2-inch diameter hand auger. Soil <br /> samples were then placed into zip lock bags and field screened for organic vapor using a model <br /> 580A photo-ionization detector (PID). None of the hand auger samples were preserved as none <br /> exhibited field indications of petroleum hydrocarbons. <br /> Each preserved sample was logged on a chain-of-custody forth, placed in a chilled container and <br /> transported to a California Department of Health Services (DHS)-certified laboratory. Selected <br /> samples were analyzed for: <br /> • Total petroleum hydrocarbons as gasoline (TPH-g), total petroleum hydrocarbons as diesel <br /> (TPH-d) and total petroleum hydrocarbons as motor oil (TPH-mo) by EPA Method 8015 <br /> Modified/3550; and <br /> • Volatile aromatic compounds -benzene, toluene, ethyl-benzene and total xylene (BTEX), <br /> and methyl tertiary butyl ether(MTBE)by EPA Method 8020. <br /> 3.3. Equipment Decontamination <br /> Prior to sample collection, Geoprobe soil sampling equipment was thoroughly rinsed with clean <br /> water after being washed with a solution of Alconox. Geoprobe rods were thoroughly cleaned prior <br /> to soil probe boring advancement. <br /> 4.0. FINDINGS <br /> Laboratory analysis of soil and ground water samples were utilized to assess the hydrocarbon-impact <br /> on the two media. <br /> Advanced Geo Environmental,Inc. <br />