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APEX EIYVIROTECH, INC. _
<br /> STANDARD OPERATING PROCEDURES
<br /> Quarterly Monitoring Reports
<br /> 50P - 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 its static level
<br /> Sample identtfication and chain-of-custody procedures ensure The sampling equipment consists of either a"Te Ron"bailer,
<br /> 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 collection to ultimate disposal Each sample the bailer is usually"Teflon,"but the bladder pump is PVC with
<br /> container submitted for analysts 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 analysts,40-milliliter glass,volatile organic
<br /> unique to the sample,any in-field measurements made, analysts(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 - la
<br /> MF-ASURING 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 /> 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 Itqusd-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 venfy sample integrity, and product bailer(s) The field kit also includes cleaning
<br /> correct preservation,confirm collection to the proper supplies(buckets,solution,spray bottles and deton¢ed water)
<br /> container(s),and ensure adequate volume for analysts to be used in cleaning the equipment between welts
<br /> If these conditions are met,the samples w41 be assigned Prior to measurement,the Instrument by is lowered into the well
<br /> unique laboratory log numbers for identification throughout until it touches bottom Using the previously established top-of-
<br /> analysts and reporting The log numbers will be recorded on casing or top-of-box(r e,wellhead vault)point,the probe cord
<br /> the chain-of-custody forms and to the legally-required log book (or halyard)is marked and a measuring tape(graduated In
<br /> maintained to the laboratory The sample description,date hundredths of a foot)is used to determine the distance
<br /> received,cltenrs 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-levet data sheet as
<br /> the'Measured Total Depth"of the well
<br /> SOP - 5 When necessary in using the interface probe to measure liquid
<br /> LABORATORY ANALYTICAL gUALIITV 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 The probe tip Is then lowered Into the well and submerged In
<br /> precision and bias Additional components of the laboratory g
<br /> Quality Assurance/Quality Control program include the a Is In water An oscillating I (beeping)tone indicates the
<br /> probe Is in water The probe is slowly raised until either the
<br /> I Participation to state and federal laboratory oscillating tone ceases or becomes a steady tone In either
<br /> accredttattoNcerbficatton 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 to 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-of-Control"/Carrecttve Action documentation DTW and DTP measurements are recorded on the liquid-level
<br /> procedures,and, data sheet When FLH are Indicated by the probes response,
<br /> a product bailer Is lowered partially through the FLH-water
<br /> 5 Muhl-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 quite thin This measurement Is
<br /> GROUNDWATER PURGING AND recorded on the data sheet as"FLH thickness"
<br /> SAMPLING In order to avoid cross-contamination of wells during the liquid-
<br /> Prior to water sampling,each well is purged by evacuating a level measurement process,we€is 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 discharge addition,all measurement equipment is cleaned with solution
<br /> water temperature,conductivity,or pH stabilize,a ma�dmum of and thoroughly rinsed with detontzed water before use,between
<br /> ten wetted-casing volumes of groundwater have been measurements In respective wells,and at the completion of the
<br /> recovered,or the well Is bailed dry day's use
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