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APEX ENV iROTECH, INC. remains in the cooler during transport,and Is analyzed by the laboratory along with the groundwater samples in addition a field blank may be STANDARD OPERATING PROCEDURES prepre ad In the Heid when sampling equipment Is not dedicated The field blank is prepared attar a pump or barter has bean either Steam loaned ar Quarterly Monitoring Reports property washed prior to use In the next well and Is analyzed along with the othersamples The field blank analysts demonstrates the effectiveness of the In-field cleaning procedures to prevent cross- P-4 ross- OP-4 contamination MPLE 1DENTiF1CATION AND CHAIN-OF- To minimize the potential for cross-contarninatdon between wells,al wet CUSTODY PROCEDURES development and water sampling equipment not dedicated to a well a either steam cleaned or properly washed between use As a secondary Sample iderttlfluatlon and Chau-al�tislody procedures ensure sample precautionary measure watt are sampled In order of hast to highest ore e concenlratlo integrity as wed as document sample possession tram the time of rta siabllslted illy available previous armllAlCa1 data oodectlon to ultimate(1feQosal. Each sample container submitted for In the event the waiter samples cannot be submitted to the analyl W analysis is labeled to identify the fob number data time of sample laboratory on the same day they are collected(e g due to weekends or eoliectdon,a sample number unique to the sample, any u'-field holkdays).the samples ars temporaftly stoned until the first opportunity for measurements made sampdrg methodology.names)of on-site submittal either on water loo In a cooler such as when in the tkiid or n pereonneL and any other perilnant Heid observations aiso reoondad on the refrigerator at Apex's sorsa Hell excavation or boring log. Chatrwf-custody fortes ars used to recons possession of the sample from SOP-12 time of collection to arrMw at the laboratory During shipment the person MEASURING LIQUID C E Y E L S USING WATER with custody of the samples wd redrlqumh Inset to the next person b r e LEVEL METER O R INTERFACE P R O B E stgrmg the chain-d-custody form(s)and nollnq the date and time sampia�ontrol officer at the laboratory wM verily sample irtegfty.Cartact preservation codhm collection in the proper con atnar(s),and ensure Field equipment used forllgwd-level gauging typiealM includes the adequate volume for anstyars. measurinqntstrumem (weterlevel meter or interlace probel and product It these conditions aro met the samples will be assigned unique laboratory bails(s) rhe held kit also includes ctearong supplies(buckets,solution. tog numbers for rdentdlicadon tTmoughout analysis and reporting Thelog spray bottles,and daatund water)to be used In deaning the equipment numbers will be recorded on the chenrot-cantody forms and In the legally, bet~wee" fequued log book maintained in the laboratory The sample descspdon Prior to measurement the inatnunian tip a lowered into thawed until It date received.coati's name and any other relevant tntonnatbn will also touches bottom Using the previously established top-at-rasetg or 1"-OS- be recorded box if e. wellhead vwA)part the probe cord(or halyard) is marked and a measuring taps(graduated in hundredths of a toot)is used to determtrw SOP-5 the distiltims between the probe end and the marking on the cord. This LABORATORY ANALYTICAL QUALITY measurenrnt is than recoidedi on thefigwd-level data meet as the ASSURANCE AND CONTROL Measured Total Uopth of the wet When nocimsary Inuarg the Interface probe to measure liquid leveis.the In addfflon to routine Instrument cadbrabon replicates spikes blanks. pfObe is firm clow ally grounded to ermar the metas stave pipe or another spiked bunks and comiled reference rnsleners ars routh"analysed at metal object nearby When no ground Is available reproducible memod.epeedke frequencies to mondor pnhtlalon and bias Additional rneaauremerus can be obtained by dipping the ground lead to the hanole Components of the laboratory QuWtry AseureflCa44aiffy Cartrol program of the interface probe case. include The probe tip is then lowered into the wed and submaNed in the Partldpadon m state and federal laboratory 4rouprobe i Any mleadru (beeping)for* rias ns probe rsr water accredtatiorvoertdlcatlon programs. The prone a early one n either either the "is ins tone ceases all 0 bacorutee a steady tone In edtter Case Itis a the daptt-tawalar(0iwf afticlPaHon In both U S EPA Perionnartce EvewiuloM studhs Irtdlealtion and the"ItteatufemNM is made acwrd rxyy The steady 2 P (VtrS and WP stuh and Irtarlaboratory periamtaroe tons indicates floating liquid hydeoearoons(FLM) in this ase the probe is uct evaivatbn progiefra (�Indication and the steady raised untill the tone maasu�ni Is made arab This is the MrtlMtigo"pyf� 3 StandsM operating procedures describing routine and perlodlo The pmeass of towering and rafsI the probe must be repeated sewenM Irtmrumed maintenance times to ensure accurate measuremems. The DTW and DTP 4 outof.Cortror/Cotraetfve Action documentation procedures measurements ate recorded on the liquid-lwel data sheet When FLH we still Indicafod by the probe s reopens,a proom baler is lowered 1)w" 0 through the FLM-weler Inertaca to coftbm In*FLH on the waw surtaca 5 Mults•levd review of raw data and efleft reports. and as further Indication at the FLM Ihldtrosa.partknitirIf IM cases where the Flit layer is quite thin Thls mosswomert is recorded on the data sheat as FLM 1hk*r wL* SOP-7 In order to arauddcroseobillamilvdan at weds during the dquld-lead GROUNDWATER PURGING AND SAMPLING measurement proceaa.waft am masutredintheaderof-clean•to dW (whole such inrofmrlon s avafhtbM) in adatlon alt mossurernefA Prior to water sampling,each well Is purged by evacuating a mintlmum of swoners batorsis betweenwith sowiliori and rneaaumemefttemau"rinsed wait.drtiized three wetted,weWcasnrg gvolumesatgraundwiliter When requited.pung wallar will continue untq edher the dWeharge water teflPerabme oDndlutalv".or compionon of the day's use. pH stabilize a maximum of ten wetted-cm"volumes of gm r d Or have been recovered.or the well Is bailed dry When praQicai the groundwater SWMIO should be colMdad when the water heel In the well recovers to at least 80 Perces of da alalic Iwai. The mmpdttg Nwipmers cordata of oftera baiter PVC baff or sldnim stets biaddarpunP with a'Teflon'badder If the sanV&g em is dodk ated to the wed,then the bailer is usually 'Teton:but the rgpt an the intended with da poh►p��f000pnn�yyrltnla bladder In 9�deporalvouara or pt)o arm"*(VOA)vrale,vM Teilx tapir am used as sm" Corti bvm The gr - Wilta ll aafnpyt is domed Into eadt VOA vhd 1n such a manner that t is no tnMdacus at the top at the 11@11. A cap Is quickly secured to the top at the Viet. The Mil Is than 4rvertod and gantry tapped 10 sea If at bubbha aro ptte@Wg M nww w Prwm t,the vhf*M bated and fMtlgandad for dedirey,under 9M chWO4HXmdWY.to the srtatytiM Itbortday Label Infarnrthmahouid WARM a urdgw sample "C"on Maribor job iderdd cam nui ber,data.timpe e.tyof Wwar requalided,and the swnphrs Mauve. arwww*oanbttl MXPoaa..a de kWG solar lian'PM Is aoddidi d ffem each wall, Tlda so"+r"also be nMWMd or PIA an hold at fir ltborao V When repolaq a tib bleirdt.Prepay a0 at do'it a ttry.in phrra0 htAr 11"trtepont cooltr. It ls labeled satdlerto the was sarlpiea.