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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 when
<br /> SAMPLE IDENTIFICTION AND CHAIN-OF the water level in the well recovers to at least 80 percent of Its
<br /> CUSTODY PROCUDURES static level
<br /> The sampling equipment consists of either a"Teflon' bailer,PVC
<br /> Sample identification and chain-of-custody procedures ensure bailer,or stainless steel bladder pump with a"Teflon bladder If
<br /> sample Integrity as well as document sample possession from the the sampling system is dedicated to the well,then the bailer is
<br /> time of collection to ultimate disposal Each sample container usually"Teflon,"but the bladder pump is PVC with a
<br /> submitted for analysis is labeled to Identify thejob number,date, polypropylene bladder In general and depending on the intended
<br /> time of sample collection,a sample number unique to the sample, laboratory analysis,40-milliliter glass,volatile organic analysis
<br /> any in-field measurements made other pertinent field observations (VOA)vials,with`Teflon"septa,are used as sample containers
<br /> also recorded on the field excavation or boring logs
<br /> Chain-of custody forms are used to record possession of the SOP— 12
<br /> sample from time of collection to arrival at the laboratory During MEASURING LIQUID LEVELS USING
<br /> shipment,the person with custody of the samples will relinquish WATER LEVEL METER OR INTERFACE
<br /> them to the next person by stgning the chain-of-custody form(s) PROBE
<br /> and noting the date and time The sample control officer at the
<br /> laboratory will verify sample integrity,correct preservation, Field equipment used for liquid-level gauging typically includes
<br /> confirm collection in the proper container(s),and ensure adequate the measuring instrument(water-level meter or interface probe and
<br /> volume for analysis product bailer(s)) The field kit also includes cleaning supplies
<br /> (buckets,solution,spray bottles,and demnized water)to be used in
<br /> If these conditions are met,the samples will be assigned unique cleaning the equipment between wells
<br /> laboratory log numbers for identification throughout analysts and
<br /> reporting The log numbers will be recorded on the chain-of- Prior to measurements,the instrument tip is lowered Into the well
<br /> custody forms and in the legally-required log book maintained in until it touches bottom Using the previously established lap-of-
<br /> the laboratory The sample description,date received,client's casing or tap-of-box(i e,wellhead vault)point,the probe cord(or
<br /> name,and any other relevant information will also be recorded halyard)is marked and a measuring tape(graduated in hundredths
<br /> of a foot)is used to determine the distance between the probe end
<br /> SOP-5 and the marking on the cord This measurement is then recorded
<br /> LABORATORY ANALYTICAL QUALITY on the liquid-level data sheet as the"Measured Total Depth'of the
<br /> ASSURANCE AND CONTROL well
<br /> In addition to routine instrument calibration,replicates,spikes, When necessary in using the interface probe to measure liquid
<br /> blanks,spiked blanks,and certified reference materials are levels,the probe is first electrically grounded to either the metal
<br /> routinely analyzed at method-specific frequencies to monitor stovepipe or another metal object nearby When no ground is
<br /> precision and bias Additional components of the laboratory available,reproducible measurements can be obtained by clipping
<br /> Quality Assurance/Quality Control program include the ground lead to the handle of the interface probe case
<br /> I Participation in state and federal laboratory Hie probe tip is then lowered into the well and submerged in the
<br /> accreditation/certification programs, groundwater An obcillating(beeping)tone indicates the probe is in
<br /> 2 Participation in both U S EPA Performance water The probe is slowly raised until either the oscillating tone
<br /> Evaluation studies(WS and WP studies)and ceases or becomes a steady tone In either case,this is the depth-
<br /> inter-laboratory performance evaluation to-water(DTW)Indication of the DTW measurement is made
<br /> accordingly The steady tone indicates floating liquid
<br /> programs hydrocarbons(FLH) In this case,the depth-to-product(DTP)
<br /> 3 Standard operating procedures describing routine indication and the DTP measurement is made accordingly
<br /> and periodic instrument maintenance,
<br /> 4 "out-of-Control !Corrective Action The process of lowering and raising the probe must be repeated
<br /> documentation procedures,and
<br /> 5 Multi level review of raw data and client reports several times to ensure accurate measurements The DTW and
<br /> DTP measurements are recorded on the liquid-level data sheet
<br /> Whin FLH are indicated by the probe s response,a product bailer
<br /> SOP-7 is lowered partially through the FLH water interface to confirm the
<br /> GROUNDWATER PURGING AND SAMPLING FLH thickness,particularly in eases where the FLH layer is quite
<br /> thin This measurement is recorded on the data sheet as"FLH
<br /> Prior to water sampling,each well is purged by evacuating a thickness
<br /> minimum of three wetted well-casing volumes of groundwater
<br /> When required purging will continue until either the discharge In order to avoid cross-contamination of wells during the liquid-
<br /> water temperature,conductivity,or pH stabilize,a maximum of ten level measurement process,wells are measured in the order of
<br /> wetted-casing volumes of groundwater have been recovered,or the clean'to `dirty' (where such information is available) In
<br /> . well is bailed dry addition,all measurement equipment is cleaned with solution and
<br /> thoroughly rinsed with deionized water before use,between
<br /> measurements in respective wells,and at the completion of the
<br /> day s use
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