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r <br /> 14 November 1995 3. r <br /> r <br /> AGE-NC Project No. 95-0185 <br /> y' Page 4,of 5.' <br /> 2. Boring locations will be marked'at,least 48;hours in advance for.an Underground�Service <br /> r <br /> Alert (USA) check of undergrouM.utilities or <br /> 3 Advance three soil borings,.using a thick-mounteddrill'rig, and;8 25 inch diameter hollow <br /> stem augers. Two borings will. be advanced tb depths of 30 feet.and,one.baring will be ` - ,= J <br /> 4 -advanced.to a depth of 20,feet. Boring locations will be approved by the PHS-EHI).prior to <br /> € drilling. <br /> ' 4. > Decontaminate all'sampling equipmentin'an alconox solution'and rinse'tw-see with water;prior.. <br /> s -to each sampling'run -Steam-clean auger flights:before advancement of each-boring. <br /> 5 _Sample each boring, beginning at 10.feet bsg,-utilizing a California split=spoon sampler and <br /> :pre-cleaned 2-inch by G-inch brass sleeves. <br /> ing both e <br /> . Preserve soil in ahe brass sleeve by covernds with aluminum foil or teflon tape, sr <br /> f s capping, and,sealing with:fape. F� < .- �- • `,` <br /> 7 Store the samples under ice,and transport the.samples in a chilled ic0a chest to a State certified. <br /> laboratory for analysis 8.,: :Screen soil sample dupliicates for the presence of volatile organic' using a to +onization �t y <br /> " .:detector (PID) pre-calibrated,to'isobutylene': <br /> 9. . Log borings in accordance with Unified'Soil-Classification'System'.. 4$ ` <br /> ':Selected soil samples=will"beanalyzed for.lPH-d and BTE&X in-' <br /> with the <br /> appropriate EPA methods <br />- 11. Cuttings aria rinse water generated during drifting act�vities-will be containerized in properly i <br /> " labeled D.O.T:model 17YI 55-gallon drums,.and stored on-site in an area inaccesGible.toxhe <br /> _general public. I3isposal alteniatives will bevvaluated based.,on results of Nbordtory analyses, <br /> _Convert the bores a:s two-inch'diainetei moriitotin�,wells in accordance w�th.the.we!! design _ <br /> lin.Figure 3. <br /> g <br /> _Develop new monitonng:wells utilizing a submersible pump until water is essentially sediment <br /> 12 <br />- free. <br /> 13 '.Survey the top of each well casing to;the nearest 1/100th of an inch to deter mine the, elevation <br /> r *� <br /> .relative to-existing wells: 4 <br /> , . <br /> I4.=No sooner than 48 hours`�after in'stallation of.ground water mormoring wells, 'measure to the <br /> _nearest 0.01.foot-the static ler level in the new+wells <br /> 15 Using a dedicated bailer or;subniersible pump, spurge and-purge fill welds At leas'. three well F <br /> -volumes of water: will 'be. removed from each well to stab'slize'teinpeeature, pH, and <br /> conductivity; stabilization:pararneters will be measiued at brie-well volume intervals. Grou*iti <br /> water -samples..r-will be collected using-polyetllylesie disposable_bailers; .samples wi!! be <br /> 4 <br />.. �ottles 40=m1 VOAgWs preserved with hyd <br /> collected in 1-liter amberrochloric acid. ' <br /> r r <br />'S' r ix-f ,Y- R. .- � 4 yam.-"' �yT* � '& NYR 3'• � _:, � -{` ' <br />