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APEX ENVIROTECH, INC..
<br /> 5TANDARD OPERATING PROCEDURES
<br /> ~` Quarterly Monitoring Reports
<br /> SOP _ q When practical,the groundwater sample should be collected
<br /> SArII PLE IDENTIFICATION AND CRAIN- when the water level in the well recovers to at least so percent
<br /> I` OF-CUSTODY PROCEDURES aNtsStatic ievel,
<br /> The sampling equipment consists of either a"Yellen"bailer,
<br /> Sample identification and chain-ef-custody procedures ensure PVC bailer,or stainless steel bladder pump with a-Teflon"
<br /> ' sample integrity as well as document sample possession from bladder. If the sampling system is dedicated to the well,then
<br /> { the time of collection to ultimate disposal. Each sample the bailer is usually"Teflan,"but the bladder pump is PVC with
<br /> container submitted for analysis is labeled to Identify the job, a pclyprepytene bladder. In general and depending on the
<br /> number, date, time of sample collection,a sample number intended laboratory analysis,40-milliliter glass,volatile organic
<br /> { unique to the sample,any in-field measurements made, analysis(VCA)vials,with-Teflon'septa,are used as sample
<br /> sampling methadalagy,names)al an-site personnel,and any. containers.
<br /> other pertinent field observations also retarded an the field
<br /> excavadcn ar baring leg. S a P -.]2
<br /> I. MEASURING LIQUID LEVELS USING
<br /> E Chain-0f-4--ustody farms are used to record passession of the WATER LEVEL METER.OR INTERFACE
<br /> sample from time of collectan to arrival at the laboratory, PROSE
<br /> During shipment,the person with custody of the samples will .
<br /> relinquish them to the next person by signing the chain-af- Field equipment used for liquid-levet gauging typically includes
<br /> custody form(s)and noting the date and time. The sample- the measuring instrument(water-level meter or interface probe)
<br /> contra[officer at the laboratory will verify sample Integrity, and product bader(s)..The field kit also includes cleaning
<br /> correct preservation,confirm collection in the proper supplies(buckets,solution,spray battles,and deianized water)
<br /> + container(s),and ensure adequate volume for analysis, to be used in cleaning the equipment between wells.
<br /> If these conditions are met,the samples will be assigned Prior to measurement,the instrument tip is lowered into the well
<br /> unique laboratory lag numbers far identification throughout until it touches bottom. Using the previously established top-0f-
<br /> analysis and reporting. The lag numbers will be retarded on casing or tap-al-box(i.e.,wellhead vault)paint,the probe card .
<br /> the chain-0f-custody farms and in the legai[y-required lag book (or halyard)is marked and a measuring tape(graduated in . I
<br /> maintained in the laboratory. The sample description,date hundredths of a foot)is used to determine the distance
<br /> received,client's name,and any ether relevant information will between the probe end and the marking an the card- This
<br /> { also be retarded, measurement is then recorded on the liquid4evei data sheet as
<br /> the"Measured Total Depth"of the well.
<br /> When necessary in using the interface probe to measure liquid
<br /> LABORATORY ANALYTICAL QUALrrY levels,the probe is first electdcaltygrounded to either the metal
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<br /> AS-SURANCE AND CONTROL stave pipe or another metal abject nearby. When no ground is ,
<br /> available,reproducible measurements can be obtained by
<br /> In addition to routine instrument calibration,replicates,spikes, clipping the ground lead to the handle of the Interface probe
<br /> blanks,spiked blanks,and certified reference materials are case.
<br /> routinely analyzed at method-specific frequencies to manitor The probe tip is then lowered into the well and submerged In
<br /> + precision and bias. Additional campanents of the laboratory the ground,.rater. An ascillating(beeping)tone indicates the
<br /> Quality AssuranceJQuatity Control program include: '
<br /> i probe is in water, The probe is slowly raised until either the
<br /> toscillating-tone ceases or becomes a steady tone. In either
<br /> 1. Participation in state and federal laboratory case,this is the depth-toarrater(DTW)indicaken and the DTW '
<br /> accreditation/certifica@an programs;
<br /> measurement is made accordingly. The steady tone indicates
<br /> 2 Participation in bath U.S. EPA Perfarmance floating liquid hydrocarbons(FLH). in this case,the probe Is
<br /> Evaluation studies(WS and WP studies)and Inter- slaw&/raised until the steady tone ceases. This is the depth-ta-
<br /> laboratory performance evaluation programs; product(OTP)Indication and the DTP measurement Is made
<br /> accardingly.
<br /> ` 3, Standard operating procedures describing routine
<br /> and periodic instrument maintenance; The process of lowering and raising the probe must be
<br /> repeated several times to ensure accurate measurements. The
<br /> 4. 'nut-0f Control"!Corrective Action documentation DTW and OTP measurements are retarded an the liquid-level
<br /> procedures;and, I data sheet-.When FLH are indicated by the probe's response,
<br /> # a product bailer is lowered partially through the FLH-water
<br /> 5- Mutti-{evei review of raw data and client reports. Interface to confirm the FLH an the water surface and as,
<br /> further indication of the FLH thickness,particularly in cases
<br /> i SO p - 7 where the FLH layer is quite thin, This measurement Is
<br /> GROUNDWATER PURGING AND jrecorded an the data sheet as-FLH thickness."
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<br /> SAMPLING
<br /> In order to avoid crass-cantaminati4n of wells during the liquid- ]
<br /> `. Prior to,mater sampling,each weil is purged by aracuating a level measurement process,wef[s are measured in the order of
<br /> minimum of three wetted well-casing volumes al groundwater. "clean"to"dirty"(where such information is available). In
<br /> When required, purging t-fill canlinue until either the discharge addition, all measurement equipment is cleaned with salut On
<br /> water temperature,canductiv t/,ar pN stabilize,a ma)dmum of and theraughhy.drised Yv th deion�ed water before use,between
<br /> ten wetted-casing volumes of graundvratar have been measurements in respective wells,and at the completion of the
<br /> recovered, or the well is bailed dry. days use.
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