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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 the job 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 signing 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 deionized 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 analysis 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 top-of-
<br /> the laboratory. The sample description,date received,client's casing or top-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 /> stave pipe or another metal object nearby. When no ground is
<br /> routinely analyzed at method-specific frequencies to monitor
<br /> precision and bias. Additional components of the laboratory available,reproducible measurements can be obtained by clipping
<br /> Quality AssurancOQuality Control program include: the ground lead to the handle of the interface probe case.
<br /> 1. Participation in state and federal laboratory The probe tip is then lowered into the well and submerged in the
<br /> accreditation/certification programs; groundwater.An oscillating(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 /> programs; accordingly. The steady tone indicates floating liquid
<br /> 3. Standard operating procedures describing routine hydrocarbons(FLH). In this case,the depth-to-product(DTP)
<br /> and periodic instrument maintenance; indication and the DTP measurement is made accordingly.
<br /> 4. "out-of-Control"/Corrective Action The process of lowering and raising the probe must be repeated
<br /> documentation procedures;and, several times to ensure accurate measurements. The BTW and
<br /> 5. Multi-level review of raw data and client reports. DTP measurements are recorded on the liquid-level data sheet.
<br /> SOP-7 When FLH are indicated by the probe's response,a product bailer
<br /> is lowered partially through the FLH water interface to confirm the
<br /> GROUNDWATER PURGING AND SAMPLING FLH thickness,particularly in cases 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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