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10 Noveirtber 2006 <br /> AGE-NC Project No. 01-0815' "' <br /> Page 2;of 5 <br /> Environmental Protection Agency, 1985). Prior to mobilization,the:proposed well location will be. <br /> clearly marked and a utility clearance obtained.through Underground Service Alert. . . <br /> -2.2: DRILLING AND SOIL SAMPLE COLLECTION <br /> AGE proposes to'.advance.two+pilot soil borings on e'site.for-the'vertical.assessment of soil <br /> impactedwith hydrocarbons,the first will be advanced to approximately 150 feet bsg and the second <br /> pilot boring will be ad..anced_to approkimately 130 feet sg for the installation of one d_e th discrete ' <br /> ground water momtoring well based on the hydroge logic condition observed at 130 feet; (if <br /> significant. e.ro eum hydrocarbon impact is detected ; the total depth of each 3r g may vary <br /> according to hydrogeologic/geologic,conditions encou tered during drilling: The borings,will be <br /> installed using struck-mounted,hollow-st . 11 rig eq uippe'd with 8.25-inch hollow-stem augers. <br /> One of the pilot borings (MW-Q.-will be completed-as single-level ground water monitoring well <br /> screened from a proposed 173 timet bsg for later l'definition of the dissolved contamination <br /> plume,n t e -other` iormg�B-2.will be advanced t 15_0 feet.bsg for.vertical is coition and <br /> backfilled following soil sample collection. mooring; 11 be advanced within the f rmer"" §T area <br /> betwee- `I��_a1dlP-3 riorthfpfMW-1 (Figure 2)., v�18 CL <br /> Soil samples will be collected from wiihin'the 8.25-in h hollow-stem augers at five-foot intervals Ca d <br /> using a California split-spoon sampler;and bra sssieeve r amples will be colle ed from 5 feet bsg <br /> to to a epth m orin B- and not collected in_MW-6 Selected soil samples will be analyzeE , <br /> �.� <br /> a'State of Cal'ilarni� HS-certified:laboratory for the f llowirig'constltuerits:"°`� <br /> • 'Total petroleum hydrocarbons quantified 'as gasoline, and diesel (TPH-g and TPH-d, <br /> :respectively) in accordance with EPA Method 01.5M; and <br /> • Benzene, toluene, ethylbenzene, and total'xyl nes'(BTEX) and the fuel additive methyl - - <br /> tertiary-butyl ether(MTBE) by EPA Method 8260B.. <br /> Laboratory reports of soil analyses, testing methods, 1 boratory-.quality assurance/quality control <br /> (QA/QQ reports, and sample_chain of custody"docum ntation will be presented in a report. <br /> 2.3. MONITORING WELL INSTALLATION,`DEI IELOPMEXT.AND SURVEY <br /> Following installation,the well will be developed to ma imize water-flow and minimize the amount <br /> of fine-grained sediment drawn into the well during purliping or bailing,and the.top of each existing <br /> and newly installed well casing (well head) will-be"sui veyed to determine its elevation relative to <br /> _ Advanced GeAnvironmental,Inc. <br />