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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 coliected
<br /> SAMPLE IDENTIFICATION AND CHAIN- when the water level In the well recovers to at least 80 percent
<br /> OF-CUSTODY PROCEDURES of its static level
<br /> The sampling equipment consists of either a"Teflon"bailer,
<br /> Sample identification and chain-of-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 collodion 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,44milldQer 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 recorded on the field
<br /> excavation or boring log SOP - 12
<br /> MEASURING LIQUID LEVELS USING
<br /> ' Cham-of-custody forms are used to record possession of WATER LEVEL METER OR INTERFACE
<br /> thesample from time of collection to a"at the laboratory PROBE
<br /> During shipment,the person with custody of the samples will
<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(water4evel meter or Interface probe)
<br /> control officer at the laboratory will verify sample integrity, and product bailer(s) The field lat also includes cleaning
<br /> correct preservation,confirm collection In the proper supplies(buckets,solution,spray bottles,and deionmed water)
<br /> container(s),and ensure adequate volume for analysts 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 to"f-box(i e,wellhead vault)point,the probe cord
<br /> the chain-o-custody forms and in the legally-required log book (or halyard)is 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 /> When necessary In using the Interface probe to measure liquid
<br /> LABORATORY ANALYTICAL QUALITY 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 /> t 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 The probe tip 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 AssurancelAualRy Control program include 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 elther
<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 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 /> 4 "Out-0f-Control'/Corrective Action documentation DTW and DTP measurements are recorded on the liquid-level
<br />' procedures,and, data sheet When FLH are Indicated by the probe's response,
<br /> a product bailer is lowered partially through the FLH-water
<br /> 5 Mufti-level review of raw data and chert 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 quite thin This measurement is
<br /> GROUNDWATER PURGING AND recorded on the date sheet as"FLH thickness"
<br /> iie SAMPLING In order to avoid cross-corrtaminstion of wells during the liquid-
<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 of groundwater "'clean"to"dirty'(where such Information Is available) In
<br /> When required,purging will continue until either the addition,all measurement equipment Is cleaned with solution
<br /> dischargethree wetted well-casing volumes of groundwater and thoroughly rinsed with delonized water before use,between
<br /> When required,purging will continue until either the discharge measurements In respective walls,and at the completion of the
<br />' water temperature,oonductivity,or pH stabilize,a maximum of days use
<br /> ten wetted-casing volumes of groundwater have been
<br /> recovered or the well Is bailed dry
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