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APEX ENVIFiOTECH, INC_
<br /> STANDARD OPERATING PROCEDURES..
<br /> Quarterly Monitoring Reports
<br /> S to P -
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<br /> When practical,the groundwater sample should be collected
<br /> SAMPLE IDENTIFICATION AND CKWN- when the water levet in the well recovers to at least 80 percent
<br /> OF-CUSTODY PRflCEDURF_S atisstatic;level. li
<br /> The sampling equipment consists of either a'Teftan'.baifer,
<br /> Sample identiCcatian and chain-l-custody procedures ensure PVC bailer,or stainless steel bladder pump with a. Teflon" "
<br />{ sampla integrih/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 baiter is usually'Teflon,"but the bladder pump is PVC with
<br /> !, container submitted far analysis is labeled to identify the fab a polypropylene bladder. In general and depending on the
<br /> 3 number,date,time of sample collection,a sample number intended laboratory analysis,40-milliliter 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 methadafagy,name(s)of on-site periannel,and any containers.
<br /> other pertinent geld abserradans also recorded an the field
<br /> excavation or boring fag• SOP
<br /> MEASURING LIgUID LrzVELS USING
<br /> Chain-cf-custody forms are used to record possession at the WATER LEVEL METER OR IIV7ERFAC E
<br /> sample from time of collection to a&ml at the laboratory. PROBE P
<br /> Curing shipment,the person with custody of the samples will
<br /> relinquish them to the next perzan by signing the chain-01- Field equipment used far liquid-level gauging typically includes
<br /> custody fcrm(s)and noting the date and time. The sample- the measuring instrument(water•fevel meter or interface probe)
<br /> { control officer at the laboratory will verify sample Integrity, and product bailer(s).'The field kit also includes ateaning
<br /> ! correct preservation,canlmz cc[[ecGan in the proper supplies(buckets,so(ution,spray battles,and deianized water)
<br /> container(s),and ensure adequate volume far analysis, to be used in cleaning the equipment between wells.
<br /> a .
<br /> {4 If these conditions are met,the samples-mill be assigned Prior to measurement,the Instrument tap is lowered into the well
<br /> unique laboratory lag numbers for identification throughout until it touches bottom, Using the previously established top-at-
<br /> analysis and reporting. The lag numbers will tie recorded an casing or tap-ef-box(.e.,wellhead vault)point,the probe cord
<br /> ` or halyard) s marked and a measuring tae , t
<br /> the chain�f-custody forms and in the legally-required log hook ( l� )ig p (graduated in
<br /> maintained in the laboratory. The sample description,date hundredths of a foot)is used to determine the distance .
<br /> �I (" received,client's name,and any other relevant information will between the probe end and the marking on the card. This
<br /> [�r.�■ also be recorded. measurement is then recorded on the liquid-level data sheet as
<br /> the'Measured Total Depth"of the well.
<br /> SOI' - 5 When necessary in using the interface probe to measure liquid
<br /> LAE3 o RATO RY ANALYTICAL g UAL TY levels,the probe is first electrically grounded to either the metal
<br /> ASSURANCE AN13 CONTROL stave pipe or another metal abject nearby. When no ground is j
<br /> available,reproducible measurements can be obtained by. !
<br /> In addition to routine instrument calibration,replicates,spices, clipping the ground lead to the handle of the Interface probe
<br /> blanks,spiked blanks,and certified reference materials are case.
<br /> j routinely anatyzed at method-specific frequencies to manitor The probe tip is then lowered into the well and submerged In
<br /> precision and bias. Additional components of the laboratory the'graundwater."Rn oscillating(beeping)tone Indicates the
<br /> II Cuafit/Assurance/Quality Control program include: probe is in water. The probe is slowly raised until either the
<br /> I. Participation in state and fedora[laboratory
<br /> oscillating tone ceases of becomes a steady tone. In either
<br /> f case,this is the depth-to-water(OTW)indication and the OTW
<br /> accreditatianlcertificatian programs;
<br /> measurement is made accordingly. The steady tone indicates
<br /> I 2 Participation in both U.S.EFA Performance floating liquid hydrocarbons(FLH)- In this case,the probe Is
<br /> Evaluation studies CAIS and WP studies)and Inter-
<br /> slowly raised until the steady tone ceases. This Is the depth-to-
<br /> i laboratory performance evaluation prograrns; product(07P)Indication and the OTP measurement is made
<br /> accordingly,
<br /> 1 3. Standard operating procedures descnhing routine The process at towering and raising the probe must be I
<br /> and periodic instrument maintenance;
<br /> repeated several times to ensure accurate measurements, The "
<br /> 4. -Out-cf-Cantrciricarrective Action documentation CTW and OTP measurements are recorded an the liquid-level
<br /> procedures;and, data sheet. When FLH are indicated by the probe's response,
<br /> a product baiter Is towered partially through the FLH-water
<br /> t 5, Mufti-level review of raw data and cIfent reports. interface to canfirm the FLH an the water surface and as,
<br /> further indica Gan of the FLH thickness,particularty in cases
<br /> SOP - 7 where the FLH layer is quite thin. This measurement is 3
<br /> GROUNDWATER PURGING AND recorded an the data sheet as"FLH thickness.'
<br /> SAMPLING i
<br /> In order to avoid cros"antamina+ion of wells during the
<br /> liquid-Nor to water sampling,each well is purged by&eacuadrsq a level measurement process,wells are measured In the order of
<br /> j minimum of three wetted welt-casing volumes of graundwater, %ean-to-dirty-(vrhere such information is available). In
<br /> When required,purging wil!continue until either the discharge addition,all measurement equipment is cleaned with safutfon
<br /> vrater temperature,canducti•m`/,er pH stabilize,a ma)dmum of and tharoughly rinszd vrith deiani?ed water before use,bet,Ke'n
<br /> Zen wetted-casing volumes of groundvratar have been measurements in respective wells,and at the completion of the
<br /> recovered,or the welt is baiied dry, day's use,
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