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F_rjFjGjrjECH, INC. • S AN A D OPERq NG PROCEDURES Q"rWr[y Monitonftg Reports recovered or the well is bailed dry When practical,the Sop . 4 groundwater sample should be collected when the water level in $AMTPLK IDiLNTIFIOAYION AND CHAIIN- the well recovers to at least SO percent of its static level O1°-OUSTOpY Pit00>RIDURiIiS The sampling equipment consists of either a*Teflon"bailer,PVC Sample identification and chain-of-custodybailer,or stainless steel bladder pump with a*Tenon'bladder If sample intagnty as well as document sampleroceduras ensure the samplings tem is dedicated to the well,then the bailer is time of collection to ultimate des Possession from the penial Each sample container usually'Tefion,"but the bladder pump is PVC with a submdtod for analysts is labeled to identify the Job number,data. Polypropylene bladder In general and depending on the Intended time of sample collection a sample number unique to the sample, laboratory analysis,40-milliliter glass,volatile organic analysis MY In field measurements made,sampling methodology,name(s) (VOA)vials,with'Teflon'septa,are used as sample containers Of on-site personnel,and any other pertinent field observations also recorded on the field excavation or boring tog SOP - 2 S Chain-okustody forms are used to recordM�SURINO L"IgUID LWVKLS UsIND thesample from time of collection to arrival a Possession boratory Wi 'rKR LKVXL' MKTiR OR INTIiRFAcK During shipment the person with custody of the samples will PR alio relinquish them to the next person by signing the chain-of-custody form(s)and noting the date and time The sample-control officer Feld equipment used for liquid-level gauging typically includes the at the laboratory will verify sample integrity,correct preservation, measuring Instrument(water-level meter or interface probe)and confirm collection In the proper container(s),and ensure adequate product bailer(s) The field lot also includes cleaning supplies volume for analysis (buckets solution,spray bottles,and detanizod water)to be used If these conditions era met,the samples will be a'fsfgned unique In cleaning the equipment between wells laboratory log numbers for identification throughout analysis and Prior to measurement,the instrument tip is lowered into the well reporting The log numbers will be recorded on the chain-of- until it touches bottom Using the previously established top-of- custody forms and In the legally required log book maintained in casing or top-of box(i a,wellhead vault)point the probe cord(or the laboratory The sample description,date received,client's halyard)is marked and a measuring tape(graduated in hundredths name,and any other relevant Information will also be recorded Of a foot)is used to determine the distance between the probe end . SOP . 6 and the marking on the cord This measurement Is then recorded LAUGRATORY ANALYTIOAL QUALiTV on the liquid-level data sheet as the'Measured Total Npth"of the AS13UFIANOR AND OON1rROL well In addition to routine instrument calibration,replicates,spikes, When necessary in using the interface probe to measure liquid blanks,spiked blanks,and certified reference materials are levels,the probe Is first electrically grounded to either the metal routinely analyzed at method-specific frequencies to monitor stove pipe or another metal object nearby When no ground is precision and bias Additional components of the laboratory available,reproducible measurements can be obtained by clipping Quality Assuranco/quality Control program Include the ground lead to the handle of the interface probe case t Participation In state and federal laboratory The probe tip Is then lowered Into the well and submerged in the accreditatiWrortification programs, groundwater 9 An oscillating(beeping)tone indicates the probe is 2 Participation in both U 5 EPA Performance Evaluation In water The probe is slowly raised until either the oscillating tone ceases or!,stomas a steady tone in either case this is the studies(W5 and WP studies)and Inter-laboratory performance evaluation programs, depth-to-water(DTW)Indication and the DTW measurement Is made accordingly The steady tone indicates floating liquid 3 Standard operating procedures describing routine and hydrocarbons(FLH) In this case,the probe Is slowly raised until Periodic instrument maintenance, the steady tone ceases This Is the depth-to-product(DTP) 4 "Out-of-Control"/Corrective Action documentation indication and the DTP measurement is made accordingly procedures,and The process of lowering and raising the probe must be repeated several times to ensure accurate measurements The DTW and 5 Multi-level review of raw data and client reports DTP measurements are recorded on the liquid level data sheet SOP - When FLH are indicated by the Probe's response a product bailer Is partially through the ter inteace to confirm OROUNDWATHIR PURGING AND FLH onrthe water urrface and as further indicattiioon of the FLH the SAM PLi N G thickness,particularly in cases where the FLH layer is quite thin Tis Prior to water sampling each well is purged by evacuating a hhcknesssurement is recorded on the data sheet as'FLH minimum of three wetted well-casing volumes of groundwater When required purging will continue until either the In order to avoid cross-contamination of wells during the liquid- dischargethree wetted welt-casing volumes or groundwater level measurement process,wells are measured in the order of When required,purging will continue until either the discharge 'clean to"dtrty"(where such information is available) In addition, water temperature,conductivity ar pH stabilize,a maximum of all measurement equipment Is cleaned wrth solution and • ten wetted-casing volumes of groundwater have been thoroughly rinsed with detontzod water before use,between measurements in respective wells,and at the completion of the day's use