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APEX ENVIROTECH, INC.
<br /> STANDARD OPERATING PROCEDURES
<br /> Quarterly Monitoring Reports
<br /> SDP - .4 When practical,the groundwater sample should be collected
<br /> SAMPLE IDENTIFICATION AND CI-LAIN- when the water level in the well recovers to at feast 80 percent
<br /> OF-CUSTODY PROCEDURES of its static level.
<br /> The sampling equipment consists of either a"Teflon"batter,
<br /> Sample identification and chain-0f-custody procedures ensure PVC bailer,or stainless steel bladder pump with a"Teflon
<br /> sample integrity as wail 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-Teflon,'but the bladder pump is PVC with
<br /> container submitted for analysis is labeled to Identify the job a polypropylene bladder. In general and depending an 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, anaiysis(VOA)vials,with"Teflon"septa,are used as sample
<br /> sampling methodology,name(s)of on-site personnel,and any containers.
<br /> other pertinent field observations also recorded on the field
<br /> excavation or boring log, SOP - 12
<br /> MEASURING LIQUID LEVELS USING
<br /> i� Chain-0f-custody forms are used to record pas-session of the WATER LEVEL METER OR INTERFACE
<br /> sample from time of collection to arrival at the laboratory. PROSE
<br /> During shipment,the person with custody of the samples will
<br /> Field
<br /> relinquish them to the next person by signing the chain-of- equipment used far liquid-level gauging typicatly includes
<br /> custody formes)and Hating the date and time. The sample the measuring instrument(water-level meter or interface probe)
<br /> { custodyrol fcrm( )ficer the laboratory will verify sample integrity, and product bailer(s). The field kit also includes cleaning .
<br /> correct preservation,confirm collection in the proper supplies(buckets,solution,spray bottles,and deion¢ed water)
<br /> I{ canta,ner(s),and ensure adequate volume for analysis. to be used in cleaning the equipment between wells.
<br /> f
<br /> It these conditions are met,the samples will be assigned Prior to measurement,the instrument Up is lowered into the well
<br /> top-unique laboratory tog numbers for identification throughout until it touches bottom. Using the prev'tausly established
<br /> of-analysis and reporting. The leg numbers will be recorded an casing or top-of-box(i.e.,wellhead vault)point,the probe card
<br /> 4 the chain-of-custody forms and in the legally-required lag book (or halyard)is marked and a measuring tape(graduated in
<br /> ` maintained in the taboratory. The sample description,date hundredths of a foot)is used to determine the distance
<br /> 1 received,client's name,and any other relevant information will between the probe end and the marking on the cord. This
<br /> also be recorded. measurement is then recorded an the liquid-level data sheet as
<br /> the"Nleasured TctaI Depth"of the well.
<br /> SOP,
<br /> - 5 When necessary in using the interface probe to measure liquid
<br /> LAM RATO RY ANALYTICAL q UALITY. levels,the probe is first electrically grounded to either the metal
<br /> ASSURANCE AND CONTROL stave pipe or another metal object nearby. When no ground is
<br /> available,reproducible measurements can be obtained by
<br /> a' In addiban to routine instrument calibration,replicates,spices, clipping the ground lead to the handle of the interface probe
<br /> case.
<br /> blanks,spiked blanks,and certified reference materials are
<br /> routinely analyzed at method-specific frequencies to monitor The probe Up is then lowered into the well and submerged in
<br /> precision and bias. Additional components of the laboratory the groundwater. An oscillating(beeping)tone indicates the
<br /> ! Quality AssurancelQuality Control program include: probe is in water. The probe is slowly raised until either the
<br /> oscillating tone ceases or becomes a steady tone. In either
<br /> I Participation In state and federal laboratory case,this is the depth-to-water(DTW)indication and the DTW
<br /> accreditation/certification programs; `
<br /> � measurement is made accordingly. The steady tone indicates .
<br /> 2 Participation in bath U.S.EPA Performance floating liquid hydrocarbons(FLH). In this case,the probe Is
<br /> Evaluation studies(WS and WP studies)and Inter- slowly raised until the steady tone ceases. This Is the depth-to-
<br /> laboratory performance evaluation prams; product(DTP)Indication and the DTP measurement lis made
<br /> a accordingly,
<br /> 3. Standard operating procedures describing routine The process of lowering and raising the probe must be
<br /> and periodic instrument maintenance; repeated several times to ensure accurate measurements. The
<br /> DTW and DTP measurements are recorded an the Liquid-level
<br /> 4. "Out o(-Con trcl'lCarrective Action documentation data sheet. When FLH are indicated by the probe's response,
<br /> procedures;and, a product bailer Is lowered partially through the FLH-water
<br /> Interface to confirm the FLH an the water surface and as,
<br /> 5. Nlutti-level review of raw data and client reports.- further indication of the FLH thickness,porUcularty in cases
<br /> sop - 7 where the FLH layer is quite thin. This measurement is
<br /> GROUNDWATER PURGING AND recorded an the data sheet as'FLH thickness"
<br /> SAMPLING
<br /> In order to avoid cross-contaminabon of wells during the liquid-
<br /> Prior to water sampling,each well is purged by evacuating a level measurement prccess,_wells are measured In the order of
<br /> "clean"to'dirty'(where such information is available). In
<br /> E minimum of three wetted well-casing volumes aF groundwater, addition,all measurement equipment is cleaned with solution
<br /> Wren required,purging will continue until either the discharge and thoroughly rinsed with deienized water before use,between
<br /> water temperature,conductivity,or pH stabilize,a maximum of measurements in respective wells,and at the completion of the
<br /> ten wetted-casing volumes of groundwater have been days use.
<br /> recovered,or the well is bailed dry.
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