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f2. ! r f <br /> a ir� ,s y ! . t �! ` NS „I I F .+ � * '• :. " ,' ! i t•• Sa E i , ri] <br /> 7=November:1995 rr + i ,,; �kl <br /> ^!,l; AGE NC:Proiect No: 95 0,114 <br /> fiPage S of 6 `: t: .. , • <br /> } 14 Decontaminate sampling equipment in'An alconok solution-arid rinse twice with water prior' <br /> to each sampling run.,,- , <br /> 15. `Steam-clean auger flights-after.drilling each soil bormg'or monitoring well, ,. <br /> 4.2..' , BARING GOMPLETIONAND WELL ABANDONMENT <br /> For completion of the�soil borings/monitoring`wells;the,foilawing.proced 're ' - ill',be performed: <br /> l Complete all monitoring wells in,accordance.withthe well design illustrated in•Figure.3 <br /> Y 2: In the event four borings are required,-the excess boring will be back filed using a <br /> concrete-bentonite.slurry in-the entire depth•of the boring., . <br /> 3. Pressure grout MW-3'to the surface with Portland'cenient. <br /> 4. Over drill the upper_three feet and'fill the well with native soil to surface grade. .T. <br /> ' 5: . ' Survey.and develop each new monitoring well. Each new.well will be surveyed relative to . ;=i <br /> existing monitoring.wells. Ill <br /> .4.3. GROUND WATER SAMPLE COLLECTION <br /> Upon-completion of diilling, 'ground water,samples-will be collected from each well. The.following ' ` <br /> procedures will,be performed: <br /> 1. No,sooner than 48 hours after installation, measure to the nearest 0:01 •foot, the static'water,• <br /> level in the new wells.' - <br /> 2. Using a.bailer or,submersible pump, surge and,purge•all•wells.'Each=well will be•purged'.of' <br /> ' standing water to stabilize ternperature, ph and, conductivity. Well , parameters .will be, ;! <br /> measured atone-gallon intervals. Xniin mum of three well volumes of water will be,re rioved <br /> from each well. <br /> 3.. After stabilization, collect one ground water sample from each well: Samples will collected <br /> in'EPA 40-ml vials. Each'sample will be collected using anew disposable bailer. <br /> ' . 4. -' Transport ground wat'e'r saniples,under' chain-of custody to, a state-certified-labora tory`foi <br /> analysis. Ground water samples will.be analyzed for TPH=ss and BTE&X in accordance with <br /> EPA methods.GCFID/5030 and 602,'respectively: <br />