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SAMPLE ID>NTWiCATMK AND CHAIN-OF-CUSTODY PROCEDURES analyzed by the laboratory along with the grouridwater samples In addition,a
<br /> SOP/ field blank may be prepared m field eld when sm�plmg equipment is not
<br /> dedicated. The field blank n prepared ager a pomp or bailer has been either
<br /> Sample identification and cbam-0f-c l prxadures ensure ample auegmy, steam cleaned or properly washed,prior to use in the next well,and is analyzed
<br /> and document simple possicumn from the hine of collection to Its ultimate along with the other samples. The field blanc analysis demonstrates the
<br /> disposal- Each sample container submitted for analysis n labeled to identify the effectiveness of the m-field cleaning procedures to prevent moss-codasnmation.
<br /> iftnumber. dais time of sample collection, a sample number unique to the
<br /> le,any se.-fell mem made.sampling methodology,name(s)of on- To mm=zw the potential for between wells, all well
<br /> ante personnel and my other patment field observations also recorded on the field development and water smmplmg equipment not dedicated to a well is either
<br /> cxcavatum or boring log, steam cleaned or property washed between use As a second precautionary
<br /> measure, wells are sampled in order of least to highest concentrations as
<br /> Chamraf-custody forms are used to recm possession of the sample from time of established by available prsvrom analytical dai,
<br /> collection to sit arrival at the laboratory During ahipme4 the petsoo with
<br /> Custody Of the samples will relinquish them to the rest person by sugnmg the In the event the water samples cannot be submitted to the analytical laboratory
<br /> chem-of-custody form(s) and noting the date and time The the same day they we collected (e g., due to weekends or holidays), the
<br /> officer at the laboratory will verify simple integrity,correct preservation,confirmles are
<br /> coliectioa m the tamp Y stored until the fist Opportunity for submittal either on
<br /> Proper container(s)4 and entire adeq i volume for analysis. ince In a cooker.such as when in the field,Or in a refrigerator at Aegis'office
<br /> If that conditions we met,the samples will be assigned unique laboratory log MEASURING LIQUID LEVELS USING WATER LEVEL OR INTERFACE
<br /> numbers for deotsfmcatim throughout analysis and reporting, The log numbers PROBE
<br /> will be recorded on the chem-of-custody forms and in the legally-required log
<br /> book maintained in the laboratory The sample description,date received,cheat's SOP-I2
<br /> name,and any other relevant information will also be recorded. Reid equipment used for liquid-level ganging typically includes time measuring
<br /> probe LABORATORY ANALYTICAL QUALITY ASSURANCE AND ODNTRoL cerin(water'•Mel or interfcketa,re)and product bsiland The field list also includes
<br /> Cleaning Supp (buckets,M.spray boukas,std deronized water)to be used
<br /> in cleaning the equipment between wells.
<br /> SOP-5
<br /> In addition to routine instrument calibration,replicates, spikes,blanks, spiked Prior to measurement,the probe tip Is lowered mato the well until it touches
<br /> blanl®,and certified reforence materials are routinely analyzed at method-specific bottom- Using the previously established top-of-casing or top-of-box (LC,
<br /> frequencies to monitor precision and bus. Additional componenia of the wellhead vault)point,the probe cord(or halyard)n marked aid a meaurmg tape
<br /> laboratory Quality Assi;rarce//Quahry Control program malude (graduated m hundredths of a foot)a used to determine the duitmce between the
<br /> Probe end and the marking an the cord 'Ibis measurement n then recorded on
<br /> I Participation in slain and federal laboratory axreditationithuSatiaa the hquxt-level dtla sheat as the"Measured Total Depth"of the well,
<br /> programs.
<br /> 2 Participation in both U S EPA Performance Evaluation stud us(WS and When necessary in using the interface probe to measure liquid levels,the probe
<br /> WP xtudses)and inter-labor performance evaluation propmms, is fret electrically grounded so either the metal stove pipe or another metal object
<br /> Standard operstmg procedures describing routme and parwdsc nearby When no ground s available. reproducible measurements can be
<br /> maintenancr.4P
<br /> Out-0f-Control"/Corrective Action documentation procedures,and, Obtained by clipping the gtoemd lead to the handle Of the interface probe case
<br /> 5 Multi-level review of raw data and client reports. The probe tip a then lowered into the well and submerged in the groundwater
<br /> An oscillating(beeping)tone mdmcstes the probe is in water The probe is slowly
<br /> GROUNDWATER PURGING AND SAMPLING raised until either the oscillating tone ceases or becomes a steady tone In either
<br /> case,this n the depth-to-wster(DTW)mdwaft r and the DTV measurement Is
<br /> SOP-7 made accordingly The steady tone indicates floating hydrocarbons. In this case,
<br /> Prior to water saarplwg,each well is purged by evacuating a mamimnm of three the probe is slowly raised until the steady tone ceases. This is the depth-to-
<br /> wetted well-casmg volumes of groundwater When required, pig will P (DTP)mdwator and the measurement of DTP is recorded. A corrected
<br /> continue until either the discharge water temperature, conductivity. or pH groundwater elevation for floating hydrocarbons can be calculated by using the
<br /> stabilize, a mammum of ten well-bore volumes of groundwater have been following formula.
<br /> recovered,or the well a bailed dry When practical,the groundwater sample
<br /> should be collected when the water level in the well recovers to at leant go Corrected groundwater elevation-CDTW=DTW-(SP O x LFTT).
<br /> percent of its statue level. CDTW—Corrected depth to water,
<br /> DTW—Measured depth to water
<br /> The sampling equipment oonssts Of either a 'Teflon" barter, PVC barrier, or SP O-Specific gravity unweathered gasoline—0 75.diesel —0 80
<br /> suunks steel bladder pump with a Teflon"bladder If the sampling systems LHT—Measured liquid hydrocarbon thickness.
<br /> dedicated to the well,then the badw n usually"Tefkm,"but the bladder primp
<br /> is PVC with a polypropylene bladder In general and depending on the intended The process of lowering and ri sng the probe must be repeated several tunes to
<br /> laboratory analysis,40-milliliter glass,volatile organic aaalyas(VOA)vu*with ensure axurate measuremamia. The DTV and DTP measurements are recorded
<br /> "Teflon"septa,are used as sample oomainers on the lagiud-level dais shoes. When a indicated b the
<br /> floating Product Y probe's
<br /> response,a product baiter n lowered partially through flee product-water interface
<br /> The groundwater sample is decanted into each VOA vuh in such a manner that to confirm the product on the wager surfsoe,and as further iridication of product
<br /> there is no meniscus at the top of the vial. A cap is quickly secured to the top ducks» particularly in eases where the product layer a quite that. Thu
<br /> of the vial. The vial is then mvmsed and gemly tapped to see if air bubbles are measurement is retarded on the data sleet as"product thickness."
<br /> present If now am presort,the vial a labeled and refrigerated for delivery.
<br /> under strict char-of-custody, to the analytical laboratory Label information In order to avoid of wells during the hqu id-level
<br /> should include a unique sample mkobfiettion number.job denW'tcatim number, measurement ptocesa,wells are measured in the order of"clean"to"duty"(where
<br /> date,time.type of analysis requested,and the sampler's namesuch information is available} In addition,all measuamment equipment is cleaned
<br /> with TSP or aundar solution and thoroughly raised with demonized water before
<br /> quahnt}r cant, I purposes, a duplicate water sample s collected from each we.between measurements m respective wells,and at the completion of the day's
<br /> elL Thu sample is put on hold at she laboratory When required,a trip blank use
<br /> is prepared at the laboratory and plated in the transport cooler It is labeled
<br /> Fupro
<br /> OMR SOPS-4 5,7 12M994
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