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R R GROUP, rsc �T CLEA 'Fie",d Procedures a;roundwater N15,n and gamliling bbing do,tinhal.. of SC17 } 1n a rust ro�edi.res �onscd} do'Nn atsd sa 1s4 Decontamination p urging AunsPs u_ Anv non-dedicated 1s established �h oily P head tube and MI n� area umPe`l thr°u� if the latter is reg}u^red sslxs on + ndwa r a decontamination vash solo;tort IS g water new or dedic aced to beginning snluttan`Kash( otable water�irsdng aiP ed pumF prior p4lconax rinse o1 p water equipment In an d a Second prior to use When with an electronic Diable water an mated p pl feet during Clearwater s rinse of p decontam the nearest 4 ver and o,yell hole equipment is is used IS measured to ro ect mi"' alder o f mcreas�n� base ear at the request of rile p 7 $eparate-p Polyethylene tubing the static water level establcah a reliable ating a well. per� xt'"4 wl,icll to vr-11 if t�lo and the thiel Hess sampling easured ante P �allal7le aged between each pr electronic 0aller robe Prior to purging and is typically m en-ended p and no Depth to bottom cal artalyucal data are t1b adecantatts n 6 a clear, op with an electronic tnturf�ed sounder If 3455[4751 e will be usin: ursst to a site oder and tap is collecte Iternatrlely be Measuredg is not addition ali} P titled by the first the water sou or observed, Sl'IISPH ntav a1 during P therwtsu sP o roduct are suspe,.ted the bailer before or nYe sampled unless o and 1loatins P contamination SPH} feet In e5s of g ro been • eaSurenlents hydrocarbons ( nearest 0 0 a measurable tbickn a hydracashan water levo l m is measured to the hwell containing Wells containing fegrtty as 'ell as Any monitoring Pram that well `yell in form collected such as e[aleutattcsrts Ph5 sic al sample 15 pield observatio�sDatalPurg eristaitic pump If the ,to]ect manager Gaugtn� or a P assess azo Hated an the VC bailer submersible pumpurging activities to salinity thicknesses during P solved axyven turbidity a is urged ti el, a P monitored as drssol is defined as ° usin` ur e water ase Stabilit ode led P the p g eters such y Pa centiy. T samp uired param ity is ach5eved tun l Q dP�rr - duLlwell to be and conductivity) o uifet 1f iea arasneter stabiles and less ch €roi the b31lcr path monitoring Cemperature of the ail terra decanted eters (pH resentanve re,entatC i P am le at least four ttzne5 param les are considered reF cnndticutiit} tom a discreet s �rieasurea wa.er $ample collected tssamP n LQ°la chane tin measured tnpararrieters are well cz�i^` iso measured units,less tha parameters are wh cell uniil three rychar'e may be etc area to temperature in-itne fYowthrou_ puTe}ng continueroe Data Clian le cif less ahr t- pChang- water or it1 a ,ve}1 vnluane onstrate a slow on the Pu the Purge ualc of one Wells which dewater or dem is recorded stored an site in `1 8 degrees pahshe rest of -it ua3unie anter dewaters ing information labeled and Sal €acllsty $eParately from Ietely oved well purg is sealed. roprlate di5go initially a d well cutup ve been rem daily Purge water cued to ars 2W during our-in removed or until the es iia remo three well volute calibrated neater ss rem have beenthan arametcrs are ;tally profiled,tt e sampled after fewer sed to measure P being chem well All meters tlaLLou dx,�ms After when the sheet rovedS_� e rate, de for at D d r-app hauler exceeds well recharge ed to rechar� waste it urging rate Well is led within 24 by a licensed urg g or, P slow, the well is samp P cell after P in e cuemely S The tO th� ' 1le r immediately if recharge is for sarnplinn f» wa e e collected water level rriulated zttiver disposable ar decl'cmost sensitive to les ar volume has arca bailers, Zed for compounds labeled, Groundwater samp of its static olyethylenc a analy lied ed to at least SO�Io les bele= supe containers, bas re;_ racticable, or until suCfsC011ected using P Same laboratory- analysicai laboratory hours, if P bed Samples ar tubing appropriate art to a state-certified feast two or 1epusF the penstalti 1 Puare placed in r fo transP utdelines hours of puxg'n, Water Same cooler for resional $ les may also be collected from laced on ice fist a rele4ant local of samp are col]ecf c fust farm and PandardS required by volatilization a chain of custody {field documented on is match or surFaSs procedures in the docum following p p,nalytical detection imi adhere to the r les.CGI personnel of Of the samp each well Q degree i in3tiOn to sampling order of increastn' To prevent contain tit on prior in the expected air of latex gloves are P are collected A new, clean P rac,dures pSSeti`tously ed and groundwater samples ustng the P purg al tical results well, wells are gauged,ased On historical an y decontaminated between each contamination be thriroughLy li the sample is minima the eplutprnent will Passing throug slowly running All Qur�ng n of this section the amount of air Pie bottles are filled b3 -ihe ltd rs carefully deScnbed at the begirins g its, Samp oaths the bottle is removed volatile orgamc analy the vratcr Present the Cap volatile meniscus over the {f a bubble rs p le Collthe ail f Dam striPPIns the ` During samp ere is a within the battle Th1s helps prevent resent 1e down the side of eh bottle �rlbubbfes are p samp bottle Such 'v 12, 1999 screwed Onto the revtse'd lu' t ct,��.1tWA�tt Gsatss',1•yG-(�w51