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4.d GROUNDWATER MONITORING WEPE-JINSTALLATION WORKPLAN <br /> 1� <br /> peristaltic pump will be used to collect groundwater from soil boring TP-20. Groundwater <br /> samples will be collected from each monitoring well using a bottom-fill bailer, positive <br /> MW displacement pump, or a peristaltic pump,depending on conditions. ESA will purge the well for <br /> approximately ten well-point volumes of water or until the water is clear prior to collection of the <br /> groundwater samples. Following well purging activities, groundwater samples will be collected <br /> and transferred into appropriate laboratory-cleaned and preserved glassware, labeled and placed <br /> in a chilled ice-chest for transport to a state-certified analytical laboratory for chemical analysis. <br /> ESA will submit selected soil and groundwater samples for analysis of TPH-g using modified <br /> EPA method 8015, BTEX using EPA method 8020, MTBE, DIPE, ETBE, TAME, TBA, EDB, <br /> 1,2-DCA,ethanol,and methanol using EPA method 8260. <br /> DECONTAMINATION PROCEDURES <br /> Drilling equipment will arrive to the site clean and will be decontaminated using a high-pressure <br /> wash and detergent after each borehole. Soil cuttings generated during well installation activities <br /> will be placed in a sealed storage drum, labeled, and left on-site in a secure location pending <br /> receipt of analytical results. Groundwater will be sampled with a dedicated bailer or dedicated <br /> Teflon tubing through a slotted, well point to minimize cross-contamination. Development, <br /> rinsate, and purge water will be placed in a sealed storage drum, labeled, and left on-site in a <br /> securing location pending receipt of analytical results. Down-hole groundwater sampling <br /> equipment (well points) will either be dedicated or thoroughly decontaminated using high- <br /> pressure wash and detergent between each use. <br /> V <br /> REPORTING <br /> Following completion of fieldwork,documentation of the monitoring well installation procedures <br /> and analytical results of the soil and groundwater samples will be presented in a report. This <br /> �... report will be submitted to the SJCEHD for review. The report will include documentation <br /> derived from observations of drilling conditions, soil stratigraphy description, laboratory results <br /> of soil and groundwater analysis, and appropriate drawings describing and locating the <br /> monitoring wells. <br /> PROPOSED SCHEDULE OF IMPLEMENTATION <br /> This workplan will be submitted to the SJCEHD prior to commencing drilling operations. Upon <br /> receiving workplan approval, ESA will arrange field with UOP and Precision Sampling, Inc. <br /> ESA will obtain appropriate monitoring well permits from SJCEHD for drilling and well <br /> installation activities, and notify SJCEHD personnel the dates drilling and well installation is <br /> scheduled to occur. Samples of soil and groundwater will be remanded to the custody of a <br /> California Certified Laboratory within 24 hours of acquisition. Turnaround time for the <br /> laboratory analytical results will be approximately 10 working days. Reporting will require <br /> ,.., approximately 15 business days to complete, and a final report will be submitted to the SJCEHD <br /> within 60 days of fieldwork completion. <br /> V <br /> Environmental Science Associates 4 University of the Pacific <br /> September 25,2001 Groundwater Monitoring Well Installation Workplan <br /> 200252 <br /> V <br />