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09 May 1996 <br /> AGE-NC Project No. 96-0217 <br /> Page 2 of 5 <br /> 3.0. SCOPE OF WORK <br /> 3.1. DRILLING AND SAMPLING <br /> Based upon the analytical results of samples collected during the removal of the USTs in 1988, the <br /> PHS-EHD is requiring additional investigaiton of the site to determine the lateral and vertical extent <br /> of hydrocarbon-impacted soil and ground water. <br /> Initially, AGE proposes to install one ground water monitoring well north of the former UST <br /> excavation. Four shallow borings will also be drilled near the former former dispenser and piping <br /> areas. Proposed well and soil boring locations are illustrated in Figure 2. <br /> The boring will be advanced to approximately 15 feet utilizing a truck mounted, hollow stem drill rig <br /> and 8.25-inch hollow-stem augers. Soil samples will be collected at five-foot intervals beginning at <br /> a depth of 5 feet bsg in each boring. Samples will be collected using a California split-spoon sampler <br /> and brass sleeves. Samples will be driven by dropping a 140-pound weight from a height of 30 <br /> inches. The number of blows required to drive each 6-inch length of the sampler (blow counts) will <br /> be recorded on boring logs by an AGE staff geologist. <br /> Upon sample retrieval, the middle brass sleeve will be removed from the sampler. The ends of the <br /> sleeve will be immediately covered with Teflon tape, sealed with plastic end caps, secured with tape <br /> and immediately placed under ice in a chilled container for transportation to a State-certified <br /> laboratory. Soil sample duplicates samples will be screened in the field for the presence of organic <br /> vapors (OVs) using a photo-ionization detector. Each soil sample sleeve will be labeled with the <br /> following: boring location, depth, time, date and sampler's initials. <br /> 3.2. EQUIPMENT DECONTAMINATION <br /> All sampling tools and brass sleeves used for sample collection will be thoroughly rinsed with clean <br /> water after washing with a solution of Alconox. All Geoprobe rods are cleaned prior to advancement <br /> in each probing location. <br /> 3.3. LABORATORY ANALYSIS <br /> Selected soil and ground water samples will be analyzed for total petroleum hydrocarbons quantified <br /> as gasoline (TPH-g), volatile aromatic hydrocarbons (benzene, toluene, ethylbenzene and total <br /> xylenes: BTE&X and methyl-tert-butyl ether (MTBE) in accordance with EPA methods 8015/5030, <br /> 8020/602 and 8020/602, respectively. Laboratory reports of both soil and ground water analyses, <br /> testing methods, laboratory quality assurance/quality control (QA/QC) reports, and sample chain of <br />