|
,APEX ENVIRCTECH, INC.
<br /> STANDARD OPERATING PROCEDURES
<br /> Operation& Maintenance (O&M)
<br /> SOP-4
<br /> SAMPLE IDENTIFICATION AND CHAIN- water temperature,conductivity,or pH stabilize,a ma)amum of
<br /> OF-CUSTODY PROCEDURES ten wetted-casing volumes of groundwater have been
<br /> recovered,or the well is bailed dry. When practical,the
<br /> Sample identification and chain-of-custody procedures ensure groundwater sample should be collected when the water level
<br /> sample integrity as well as document sample possession from in the well recovers to at least 80 percent of its static level.
<br /> the time of collection to ultimate disposal. Each sample
<br /> container submitted for analysis is labeled to identify the job The sampling equipment consists of either a"Teflon"bailer,
<br /> number,date,time of sample collection,a sample number PVC bailer,or stainless steel bladder pump with a"Teflon"
<br /> unique to the sample,any in-field measurements made, bladder. If the sampling system is dedicated to the well,then
<br /> sampling methodology,name(s)of on-site personnel,and any the bailer is usually'Teflon,"but the bladder pump is PVC with
<br /> other pertinent field observations also recorded on the field a polypropylene bladder. In general and depending on the
<br /> excavation or boring log. intended laboratory analysis,40-milliliter glass,volatile organic
<br /> Chain-0f-custody forms are used to record possession of the analysis
<br /> naly is(VOA)vials,with"Teflon"septa,are used as sample
<br /> contais.
<br /> sample from time of collection to arrival at the laboratory.
<br /> During shipment,the person with custody of the samples will The groundwater sample is decanted into each VOA vial in
<br /> relinquish them to the ne)d person by signing the chain-of- such a manner that there is no meniscus at the top of the vial.
<br /> custody form(s)and noting the date and time. The sample- A cap is quickly secured to the top of the vial. The vial is then
<br /> control officer at the laboratory will verify sample integrity, inverted and gently tapped to see if air bubbles are present. if
<br /> correct preservation,confirm collection in the proper none are present,the vial is labeled and refrigerated for
<br /> container(s),and ensure adequate volume for analysis. delivery,under strict chain-of-custody,to the analytical
<br /> laboratory. Label information should include a unique sample
<br /> If these conditions are met,the samples will be assigned identification number,job identification number,date,time,type
<br /> unique laboratory log numbers for identification throughout of analysis requested,and the samplers name.
<br /> analysis and reporting. The log numbers will be recorded on
<br /> the chain-of-custody forms and in the legally-required log book For quality control purposes,a duplicate water sample is
<br /> maintained in the laboratory. The sample description,date collected from each well. This sample may also be analyzed or
<br /> received,clients name,and any other relevant information will put on hold at the laboratory. When required,a trip blank,
<br /> also be recorded. prepared at the laboratory,is placed in the transport cooler. It
<br /> is labeled similar to the well samples,remains in the cooler
<br /> .r SOP-5 during transport,and is analyzed by the laboratory along with
<br /> LABORATORY ANALYTICAL QUALITV the groundwater samples. In addition,a field blank may be
<br /> ASSURANCE AND CONTROL prepared in the field when sampling equipment is not
<br /> dedicated. The field blank is prepared after a pump or bailer
<br /> In addition to routine instrument calibration,replicates,spikes, has been either steam cleaned or properly washed,prior to use
<br /> blanks,spiked blanks,and certified reference materials are in the ne)d well,and is analyzed along with the other samples.
<br /> routinely analyzed at method-specific frequencies to monitor The field blank analysis demonstrates the effectiveness of the
<br /> precision and bias. Additional components of the laboratory in-field cleaning procedures to prevent cross-contamination.
<br /> Quality Assurance/Quality Control program include:
<br /> .... To minimize the potential for cross-contamination between
<br /> 1. Participation in state and federal laboratory wells,all well development and water sampling equipment not
<br /> accreditation/certification programs; dedicated to a well is either steam cleaned or properly washed
<br /> between use. As a secondary precautionary measure,wells
<br /> 2. Participation in both U.S. EPA Performance are sampled in order of least to highest concentrations as
<br /> Evaluation studies(WS and WP studies)and inter- established by available previous analytical data.
<br /> laboratory performance evaluation programs;
<br /> In the event the water samples cannot be submitted to the
<br /> 3. Standard operating procedures describing routine analytical laboratory on the same day they are collected(e.g.,
<br /> and periodic instrument maintenance; due to weekends or holidays),the samples are temporarily
<br /> stored until the first opportunity for submittal either on water ice
<br /> 4. "Out-of-Contror/Corrective Action documentation in a cooler,such as when in the field,or in refrigerator at
<br /> procedures;and, Apmes office.
<br /> V
<br /> 5. Multi-level review of raw data and client reports. SOP-9
<br /> VAPOR SAMPLING: "TEDLAW BAG
<br /> SAMPLING TECHNIQUE
<br /> V
<br /> SOP-7 Prior to vapor sampling,the vacuum system must reach a
<br /> GROUNDWATER PURGING AND stabilized air flow(cubic feet per minute)for approbmately 15
<br /> SAMPLING minutes. Prior to the actual collection of the vapor sample,the
<br /> following data is recorded:air flow,temperature,and pressure
<br /> Prior to water sampling,each well is purged by evacuating a at collection ports and gauges.
<br /> minimum of three wetted well-casing volumes of groundwater.
<br /> When required,purging will continue until either the discharge
<br />
|