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AWilk <br /> i <br /> S ECOR <br /> r 76 Station 11195 <br /> September 13, 2004 <br /> Page 5 <br /> 0.020 slotted screen will be installed. Field and laboratory procedures <br /> are provided as Attachment 2. <br /> • Soil Sampling and Analysis. Soil samples for lithological description <br /> and chemical analysis will be collected at 5 foot intervals to the total <br /> depth explored in each borehole. Samples submitted for chemical <br /> analysis will be sent under chain-of-custody documentation to a <br /> California state-certified laboratory. At least one sample per boring will <br /> be analyzed for TPHg, BTEX, fuel oxygenates MtBE, DIPE, TAME, <br /> EtBE, TBA, 1, 2-DCA, EDB, and ethanol by EPA Method 8260B. <br /> • Monitoring Well Development/Sampling/Analysis. Groundwater <br /> monitoring wells will be developed by rigorously surging each well over <br /> the length of the screen interval and by purging approximately 10 casing <br /> volumes of water. Groundwater samples will be collected and analyzed <br /> for the presence of TPHg, BTEX, fuel oxygenates MtBE, DIPE, TAME, <br /> EtBE, TBA, 1, 2-DCA, EDB, and ethanol by EPA Method 8260B. Field <br /> and laboratory procedures are included in Attachment 2. <br /> =<r� • Well Surveying and EDF Upload. Following installation, newly installed <br /> groundwater wells will be surveyed by a licensed surveyor to a local <br /> benchmark relative to mean sea level. Survey data including elevation, <br /> longitude, and latitude will be included in information uploaded to the <br /> state GeoTracker database. <br /> • Soil and Water Disposal. Soil cuttings and purgelrinsate water <br /> generated during well installation activities will temporarily be stored in <br /> California DOT approved 55-gallon steel drums on-site pending <br /> characterization and disposal. The drums containing soil and <br /> rinsatelpurge water will be removed by Filter Recycling Services and <br /> transported to their facility for proper disposal. <br /> • Report. Following the completion of well installation activities, SECOR <br /> will submit a report documenting the findings. The report will include soil <br /> boring logs, soil and groundwater analytical results, chain-of-custody <br /> documentation, conclusions, and recommendations for future work if <br /> needed. <br /> SCHEDULE <br /> Upon approval of this work plan, SECOR is prepared to initiate well installation activities <br /> with field work beginning approximately three to four weeks after the applicable permits and <br /> access agreements are received. A report documenting well installation activities will be <br /> CP 11195 Assessment WP 9-04.doc SECOR Intemationat Incorporated <br />