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APEX ENVIROTECH, INC.
<br /> STANDARD OPERATING PROCEDURES -
<br /> Quarterly Monitoring Reports
<br /> SOP - 4 When practical,the groundwater sample should be collected
<br /> SAMPLE IDENTIFICATION AND CHAiN- when the water level In the well recovers to at least 80 percent
<br /> OF-CUSTODY PROCEDURES of ds static level
<br /> Sample identification and chain-of-custody procedures ensure The sampling equipment consists of either a Teflon"baiter,
<br /> s sample integrity as well as document sample possession from PVC bailer,or stainless steel bladder pump with a'Teflon"
<br /> bladder It 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 on the
<br /> number,date,time of sample collection,a sample number intended laboratory analysis,40-milldder glass,volatile organic
<br /> unique to the sample,any in-field measurements made, analysis(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 retarded on the field
<br /> excavation or boring lag SOp 2
<br /> MEASURING LIgUID LEVELS USING
<br /> Chain-of custody forms are used to record possession of the WATER LEVEL METER OR INTERFACE
<br /> sample from time of collection to arrival at the laboratory PROBE
<br /> {luring shipment,the person with custody of the samples twill
<br /> relinquish them to the next person by signing the chain-of- Field equipment used for liquid-level 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 /> control officer at 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 deionized 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 log numbers for identification throughout until it touches bottom Using the previously established top-of-
<br /> analysis and reporting The log numbers will be recorded on casing or top-of-box(i e,wellhead vault)point,the probe cord
<br /> the chain-af-custody forms and In the legally-required log book (or halyard)1s marked and a measuring tape(graduated in
<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 other relevant information will between the probe end and the marking on the cord This
<br /> also be recorded measurement is then recorded on the liquid-level data sheet as
<br /> the"Measured Total Depth' of the well
<br /> SOP S When necessary in using the interface probe to measure liquid
<br /> LABORATORY ANALYTICAL. gUALITY levels,the probe is first electrically grounded to either the metal
<br /> ASSURANCE AND CONTROL stove pipe or another metal object 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 monitor
<br /> precision and bias Additional components of the laboratory The probe tip is then lowered Into the well and submerged in
<br /> Quality Assurance/Quality Control program include the groundwater An oscillating(beeping)tone indicates the
<br /> probe is In water The probe is slowly raised until either the
<br /> 1 Participation In state and federal laboratory oscillating tone ceases or becomes a steady tone In either
<br /> accreditation/certification programs, case,this is the depth-to-water(DTW)indication and the DTW
<br /> measurement is made accordingly The steady tone indicates
<br /> 2 Participation In both 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 programs, product(DTP)indication and the DTP measurement Is made
<br /> accordingly
<br /> 3 Standard operating procedures descn'bing routine
<br /> and penodic Instrument maintenance, The process of lowering and raising the probe must be
<br /> repeated several times to ensure accurate measurements The
<br /> 4 "Out-of-Coritrol"lCorrective Action documentation DTW and DTP measurements are recorded on the riquid4evel
<br /> procedures,arid, data sheet When FLH are indicated by the probe's response,
<br /> a product baiter is lowered partially through the FLH-water
<br /> 5 Mufti-level review of raw data and client reports Interface to confirm the FLH on the water surface and as
<br /> further indication of the FLH thickness,particularly in cases
<br /> SOP - 7 where the FLH layer is qurte thin This measurement is
<br /> GROUNDWATER PURGING AND recorded on the data sheet as"FLH thickness"
<br /> SAMPLING
<br /> In order to avoid cross-contamination of wells during the IIquid-
<br /> . Prior to water sampling,each well is purged by evacuating a level measurement process,wells are measured in the order of
<br /> minimum of three wetted well-casing volumes or groundwater "clean"to"dirty'(where such Information is available) in
<br /> When required,purging will continue until either the discharge addition,all measurement equipment is cleaned wdh soiubon
<br /> water temperature,conductivity,or pH stabilize,a maximum of and thoroughly nnsed with delonized water before use,between
<br /> ten wetted-rasing volumes of groundwater have been measurements In respective welts,and at the completion of the
<br /> recovered,or the well is bailed dry day's use
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