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' 11 September 2001 AGE-NC Project No. 98-0466 ' Page 19 of 24 ' saturated soil samples. The samples will be collected through the hal]Q)w stem augers utilizing a disposable bailer and will be transferred into appropriate storage containers for each analysis. The containers,described in Section 7.0 below,will be prepared by the laboratory selected to provide the analytical service. The grab ground water sample containers will be labeled with the boring designation,depth interval ' sampled,date,time of day,and the sample collector's initials.The preserved samples will be stored in a chilled container pending shipment to a DHS-approved analytical laboratory under chain of custody. 5.0. QUALITY ASSURANCE AND QUALITY CONTROL ' To ensure that data collected is of adequate quality, AGE will take the ollowing measures: • All field personnel will be adequately trained in the proper collection techniques for the type of samples to be collected and the type of analyses required. In addition, all field personnel will have completed a 40-hour Health and Safety Course as specified in OSHA Hazardous Waste Operations and Emergency Response Standard [29 CFR 1910.120(e)], and 8-hour annual refresher courses as necessary. ' • Analytical laboratories selected to provide samples analyse will be certified by the California Department of Health Services for the analytical sen ices provided. ' • Field logs will be maintained for all field activities, including documentation of sample collection, description of sampling activity and rational for variation from this work plan, sampling methodology used, equipment calibration data,personnel involved in fieldwork, ' all field measurements,relevant environmental conditions, and any other pertinent data that may affect data quality. • Samples will be preserved in the field as described in this work p Ian in Sections 4.3 and 4.4. • Samples will be logged on a chain-of-custody that will accompanythe samples from the field to the receiving laboratory. Each change of custody will be doc ented. ' • The laboratory report will note the condition of the samples upon receipt on the chain-of- custody form, a copy of which will be included in the final report. ' • All samples selected for analysis will be analyzed within standard holding times. • Samples will be analyzed according to EPA methods noted in Section 7.0 of this work plan. ' • Sample duplicates will be collected and analyzed as appropriate to ensure data validity. One laboratory-prepared travel blank will be utilized to detect cross-contamination of the VOC ' sample,and an equipment blank will be prepared in the field to check,if necessary,for cross- Advanced GeoEnvironmental,Inc. 1