|
SAMPLE LDENTU ATM AND CHAIN-0E-CUSTODY PROCEDURES analyzed by the laboratory along with the groundwater samples In addition,a
<br /> field blank may be prepared in the field when sampling equipment is not
<br /> SOP4 dedicated The field blank is prepared after a pump or bailer has been either
<br /> Sample identification and chain-of-custody procedures ensure sample mtegr , -renin cleaned or properly washed,prior to use m the next well,and aanalyzed
<br /> r onstrates the
<br /> and document sample possession from the time of collection to its ultimate along with the other samples The field blank analysis dem
<br /> .
<br /> disposal. Each sample container wbmstied for analysis is labeled to identify the effectiveness of the m-field cleaningmm
<br /> procedures to prevent cross-contaaLou
<br /> lob number, date,time of sample collection, a -ample number unique to the
<br /> sample,any m-fieid measuanmenft made,sampling methodology,name(-)of on- To nu m ize the potential for crvgs�omtamination between wells, all well
<br /> site personnel and any other pertinent field observations also recorded on the field development and water sampling equipment not dedicated to a well u ether
<br /> excavation or boring log steam cleaned or properly washed between use As a second precautionary
<br /> measure, wells are sampled in order of least to highest concentrations as
<br /> Cham-f-custody form are used to record possession of the sample from time of established by available previous analytical dila.
<br /> collection to Ila arrival at the laboratory During shipment, the person with
<br /> custody of the samples will relinquish them to the next person by aignmg the in the event the water samples collected
<br /> be , duesubmIto to the analytical laboratoryysthe
<br /> chem-of-custndy form(s) and noting the date and time The sample-control on the same day they are collected (e fir due o weekends b hohdayse the
<br /> officer at the laboratory wiU verify sample integrity.correct preservation,confirm samples aro temporarily stored until the first opportunity for submittal either an
<br /> collection in the proper contamet(&�and ensure adequate volume for analysis ace in a cooler,such as when in the field,or in a refrigerator at Aegis'office
<br /> If these conditions are suet,the samples will be assigned unique laboratory log MEASURING LIQUID LEVELS VSEXG WATER LEVEL OR INTERFACE
<br /> numbers for identification throughout analysis and reporting. The log numbers PROBE
<br /> will be recorded on the chant of-etulody forms and in the legally-regwred log
<br /> book mamtamed-the laboratory The sample description,date received,client's SOP-12
<br /> name,and any other relevant information will also be recorded Field equipment used for hquid-level gauging typically Includes the measuring
<br /> probe(water-level or interface)and product bailers) The fieid kit alio includes
<br /> LABORATORY ANALYTICAL QUALITY ASSURANCE AND CONTROL. cleanmg supphes(buckets.TSP,spray bottles,and dox mined water)to be used
<br /> in cleaning the equipment between wells
<br /> SOP-5
<br /> in addition to routine mtsnvment calibration,replicates, spikes, blanks, spaced Prior to measurement,the probe tip s lowered into the well until it touches
<br /> blanks,and certified reference materials are routinely analyzed atmethod-specific bottom. Using the previously established top-of-casumg or top-of-box (Le,
<br /> frequencies to monitor precision and bias Additional components of the wellhead vault)point,the probe cord(or halyard)is marked and a measuring tape
<br /> laboratory Quality AssunumWQuahty Control program include (graduated in hundredths of a foot)s used to determine the distance between the
<br /> probe end and the marking on the cord This measurement is then recorded on
<br /> 1 Participation in at and federal laboratory we 0dAaLon/oertific1m0n the liquid-level data sheet as the "Measured Total Depth"of the well
<br /> program.
<br /> 2 Participation in both U S EPA Performance Evaluation studies (WS and When necessary in using the interface probe to measure liquid levels,the probe
<br /> WP studies)and utter-laboratory performance evalustion programs, is fast electrically grounded to either the metal stove pipe or another metal object
<br /> Standard operating procedures describing routine sod periodic instrument nearby When no gro=d is available, reproducible measurements can be
<br /> maintenance, obtained by chppmg the ground lead to the handle of the interface probe case
<br /> 4 "Out-of-Control"/Corrective Action documentation procedures,and,
<br /> S Muhi-level review of maw data and client reports The probe tip a then towered into the well and submerged in the groundwater
<br /> An^"^pit"+,ng(beeping)tone indicates the probe is in water The probe is slowly
<br /> GROUNDWATER PURGING AND SAMPLING rased until either the oscillating tone ceases or becomes a steady tone In either
<br /> case,this is the depth-to-water(DTW) indicator and the DTW measurement is
<br /> SOP-7 made accordingly The steady tome indicates floating hydrocarbons In thiscast,
<br /> Prior to water sampling,each well is purged by evacuating a minimum of three the probe is slowly raised until the steady tone ceases This is the depth-to-
<br /> wetted well-casing volumes of groundwater When required, purging will product(DTP)indicator and the measurement of DTP is recorded A corrected
<br /> continue until either the discharge water temperAMM conductivity, or pH groundwater elevation for floating hydrocarbons can be calculated by using the
<br /> stabilize, a ma=mum 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 least 80 Corrected groundwater elevation-CDTW—DTW-(SP G x LHT}
<br /> percent of its static level. CDTW-Corrected depth to water
<br /> DTW—Measured depth to water
<br /> The sampling equipment coasts of either a "Teflon" baler, PVC baler, or SP G Specific gravity unweathered gasoline—0 75,diesel -0 80
<br /> stainless steel bladder pump with a'Teflon"bladder If the sampling system IS L,HT=Measured liquid hydrocarbon thickness
<br /> dedicated to the well,then the bailer is usually"Teflon," but the bladder pump
<br /> s PVC with a polypropykne bladder in general and depending on the intended The process of lowering and raising the probe must be repeated several times to
<br /> are recorded d
<br /> laboratory analyse,40-milliliter glass.volatile organic analysis(VOA)vials,with ensure accurate measurements The DTW and DTP measurements
<br /> "Teflon"septa,are used as sample oonumers on the hquid-level data sheet When floating product s indicated by the probe's
<br /> response,a product baler is lowered partially through the product-water interface
<br /> The groundwater sample is docanted into each VOA vial in such a manner that to confirm the product on the water surface,and as firtber indication of product
<br /> there is no meniscus at the top of the vial. A cap is quickly secured to the top thickness, particularly in cases where the product layer is quite thin. This
<br /> of the vial. The vial is then inverted and gently tapped to see if air bubbles are measurement s recorded on the data sheet as"product thickness"
<br /> present If none aro pnwent,the vul is labeled and refrigerated for delivery,
<br /> vel
<br /> under strict cliam-of-mistody.to the analytical. laboratory Label wfomiahm ]n order w avoid cross-coritammatnon of wells during the liquid ere
<br /> should mchsde a unique sample identif-kation number,Job Identification number, measurement process,wells are measured in the order of"Clean"to"duty'(where
<br /> date,time,type of analysis requested,and the sampler's name such information is available} In addition,all measurement equipment is cleaned
<br /> with TSP or sundw solution and thoroughly rinsed with detonszed water before
<br /> W.quality control purposes, a duplicate water sample to collected from each use,between measurernerts in respective wells,and at the completion of the day's
<br /> well. This sample a put on hold at the laboratory When regtirtnd,a trip blank use
<br /> is prepared at the laboratory and placed in the tnusport cooler It as labeled
<br /> Fugro
<br /> oMR SOP&-4 5 7 17NO4
<br />
|