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SANIYLE IDENTIFICATION AND CHAIN-0F-CUSTODY PROCEDURES demonstrates the efle4uveness of in-field cleaning procedures to prevent cross-
<br /> SOP-4
<br /> ,nntammahon
<br /> Sample identification and chatn-of-custody procedures ensure sample mtegnt%
<br /> and document sample possession from the time of collection to Its uiumatc To nimunize the potential for cross-contamination between wells, all well
<br /> disposgl Each sample container Submitted for anaivsts is labeled to identif% the de%elopment and water sampling equipment not dedicated to a well is either
<br /> job nurnber date, tune of sample collection a sample number unique to the steam cleaned or properh washed between use As a second precautionary
<br /> Wen,ations
<br /> ple any namr(s) of on-site personnel and anv other pertinent field measure hells are sampled in order of lowest to highest concentrations as
<br /> also recorded on the field excavation or boring log estibiished by available previous anahntcal data
<br /> Chain-of-custody fomes are used to record possession of the sample front time of In Ili, e%ent the water samples ,annol be submitted to the analytical laborator%
<br /> collection to its arrival at the laboratory During shipment the person with on the sine da% the% are collected (e g, due to weekends or holidays), the
<br /> custod% of the sample,, will relinquish them to the next person b% signing the samples Ire temporanly stored until tine first opportunit) for submittal either oil
<br /> chain-of-custod% fonn(s) and noting file date and time The sample-control r,e is, a eooier such aq when nm the field or In i refrigerator
<br /> officer at the laborator% will verify sample integrity,correct preservation confirru
<br /> collection in the proper comamer(s), and ensure adequate volume for anah sts Af—tSURING LIQUID LEVELS USING A WATER LEVEL MICATOR OR
<br /> r9TERFAC'E PROBE
<br /> If the-e conditions are met the samples will be assigned unique laboraton log SOP-12
<br /> numbers for identification throughout analysts and reporting The log munber% Field equipment used for liquid-ie%cl gauging wpicaliv includes the measuring
<br /> will be recorded oil the chain-of-custod% forms and in the legaliv-required log probe (eater level or interface)and i clean product bailer(s) The field kit also
<br /> book maintained in the laboraton The sample description date received client s includes cleaning supplies(buckets TSP spray bottles,and deronized water)to
<br /> name and any other relevant information will also be recorded be used III cleaning the equipment between wells
<br /> LABORATORY ANALYTICAL QUALITY ASSURANCE AND CONTROL Prior to measurement the probe tip is lowered into the well until It touches
<br /> SOP-5 Notion, Using the previousi% estibinshed top-of-casing or top-of-box (I e
<br /> In -iddnton to routine Instrument calibration replicate- spikes blinks spiked %%ellheid%iult)point the probe,ord(or hahard)is marked and a measuring tape
<br /> blanks and unified reference nialeriais are routineh anah zed it method%pecrfi� (gr idu ned III hundredths of a loot)r-a%ed to detennnne the distance between the
<br /> frequencie% to monnor preclsmotl ned bias additional cornponentq of tine prohe end Ind the nlarktng on the cord Thms measurement Is then recorded oil
<br /> laboraton Qualm) -1Ssuran6e/Quaht% Control program include Ili, hquid le%J data sheet -I5 the "\I,isured Tmil Depth"of the well
<br /> 1 Participation nn state ind federal iaboraton accredit 1t10n!%,er1ltic211011 Whan neeessar% nn u%umg the mlerfice probe to measure liquid levels the probe
<br /> progranns is first eleciricalh grounded to enhcr the metal stove pipe or another metal object
<br /> 2 Participation in both U S EPA Perfonttance E%aluation studies (WS ind ncirb% When no around t% a%anlable reproducible measurements can be
<br /> WP studies)and inter-laboralor% performance e%aluition programs obtained b% clipping the ground leid to the handle of the interface probe case
<br /> 3 Standard operating procedures describing routine and permodie instruntea[
<br /> maintenance The probe tip is then lowered into the well and submerged in the groundwater
<br /> 4 'Out-of-Control /Correctn a Action documentation procedures and alt osciihiting(beeping)tone indicates the probe is in water The probe is slowiv
<br /> 5 Multi-lave] re%iew of raw data and client reports raiwd lentil either file oscillating tone ceases or be,omes a stcadv tone In either
<br /> ca%e this Is the deptlmo-eater(DTR) indicator and the DTW measurement is t
<br /> GROUNDWATER PURGING aND SAIIIPLING made a6,ordntgh T11e stead% toile indicates floating lt%drocarbons Ili tills case,
<br /> SOP-7 the probe is slo%%h ritsed until the -leid% tone cease% This is the depth-to-
<br /> Prior to water sampling each well is purged b% evacuating a mininnuul of three product(DTP)indt"ior and the the isurernent of DTP is recorded A corrected
<br /> wetted well-casing volumes of ground%%ater When requir,d purging %%111 depth to groundw iter to account for floiting It%drocirbons can be calculated b\
<br /> contmueuntilerihertliediseharge%%ateriemperaturecondueti%I% orpHstabtize u%mgtile foliowIng fonuul-[
<br /> to within 100o of previoush measured %alues and a inav111un1 of ten netted
<br /> casing volumes of ground%%ater ha%e becii reco%ered or the well is balled dr% CDTI1 = DTII' (SP G \ LHT)
<br /> When practical the groundwater sample should ba collected when the nater]e%el CDT%! = Corrected depth to ground%%filer
<br /> In the well recovers to it least 80 percent of its static level Field measurements DTR = \Ieasured depth to ground%%ater
<br /> ob%ervations and procedures are noted SP G= Specific gra%fl% un%%eathered gasoline w 0 75 diesel =0 80
<br /> LHT= \leisured liquid lv drocarbon thickness
<br /> The sampling equipment consists of a cleat]bailer or%rimless steel bladder pump
<br /> with i"Teflon' bladder It the sampling q%stem is dedicated to th,"ell th,n the TII, enrr,sponding ground%%iier ele%!tion is the difference between a previously
<br /> bailer I% usualh Teflon but the bladder pump ma% be PNC x nh t det,nnmed w ell retereiiLu ele%ition Ind eilh,r the depth to groundwater or the
<br /> pol%propvlene blidd,r Sample cllntaIMMpe presen]tion ind%olume depold, %UITe,ted depth to ground%%Iter
<br /> oil the intended anmal%scs
<br /> h, pro„%s of im%enng and rening th,probe nnt-t be repeated several times to
<br /> Thr groundwater-ample is decanted Into a tch \0a %Iil in such i minmr th a ,.morsle,uriie measurements The D I\\ old DTP measurements are recorded
<br /> there is no ntenmsums at the top of the %nal a cap Is qun,kl% %,-rind 10 th, imp 0 !h, hil[ud-le%el d ni shed Wll,n tto Imes producl rs indicated b% the prob%,s
<br /> Of the anal Tete%lal Is then in%erted ind genth tapped to ser it air bubbles mr, r,%ponse I product biller iq los erect piriralh through the product-water interface
<br /> present If none are present the %nal IS labeled and refrigerited for deli%en to confirm the product on the anter surtace and as tunher indication of product
<br /> under strict chain-of-custod% to the anilvtical lahorator% Libel infortnition thtckne%s pirticuiarh tit lases where the product layer is quite thin Either this
<br /> Should include a unique sample tdenuticauon number lob Idents icihon nunlbei til,Inurement or the difference between DTR' and DTP is recorded on the data
<br /> date time ind the samplers initials slicet to producl thmckne--
<br /> For quaht% control purposes t duphcai, water sample mm be colleet,d from i in order to ivoid ero%%.,ontintrnation of "ells during the liqutd-level
<br /> well When required a trip blank is prepared at the laborator% std placed in Ili, me i%ur,mcnt process wells ire n,eisured til the order of clean”to"dirtv"(where
<br /> transport cooler It is libeled wmilar to tine well samples rem 11114 in the cooler such tilfonnailon I%i%athble) In iddnlon -til measurement equipment is cleaned
<br /> tqilring
<br /> transport and is artahzed b% the liborator% tang%villi 111, ground%% n,i %%uh ISP or similar solution Ind thoroughh nm-ed with dcuontzed water before
<br /> mples Inn addition I field blink in I% be prepired um th, field "hell s,IIIIpinlg us, het%%,ell mei%ureumentc It re%pecn%,n,lts and a!1he complellmm ofthe da)s
<br /> umpment I% not dedtcm
<br /> ited The field blank I% prepared Cher r pnp ur b ul,I i,u%till%
<br /> his been either see nil cleaned or properh washed prior io us, un Ili, ne\l"ell
<br /> and is analvzed hong unh the other samples The field blanl, utll%cIs
<br /> Fugro
<br /> OMR SOGs 4 5 7 721199A
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