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v <br /> A S S O C I A T E S I N C <br /> Sample Analysis <br /> The soil samples from the soil borings will be immediately placed in a cooler with ice and <br /> delivered under chain-of-custody documentation to a State-certified analytical laboratory. Soil <br /> samples will be analyzed for total petroleum hydrocarbons as gasoline (TPHg), benzene, toluene, <br /> ethylbenzene, and xylenes (BTEX) by EPA Methods 8015/8020, and oxygenate fuel additives by <br /> EPA method 8260. <br /> Well Develo ment and Groundwater Sam lin <br /> Measurement of depth to water in all wells will be completed to evaluate the direction and <br /> magnitude of the groundwater gradient beneath the site. The new wells will be developed using <br /> surge and bail techniques until the produced water is relatively sediment free. Prior to the <br /> collection of groundwater samples, a minimum of three well volumes (casing and sand pack) will <br /> be purged. Temperature, pH, water elevation, and electric conductivity will be measured and <br /> allowed to stabilize. Water samples will be collected using disposable bailers, one dedicated to <br /> each well. <br /> Groundwater samples collected from all monitoring wells will be submitted using chain-of- <br /> custody record to a State-certified laboratory. Groundwater samples will be analyzed for TPHg <br /> and BTEX by EPA Methods 8015/8020, and oxygenate fuel additives by EPA method 8260. <br /> Purge water will be stored in 55-gallon drums approved for hazardous liquid storage pending <br /> laboratory analysis. <br /> Report Preparation <br /> Upon completion of the well installation and development activities, a summary report will be <br /> prepared for submittal to PHS/EHD. The report will include a description of all field activities, <br /> laboratory analytical results, and well/boring logs. <br /> All work described in this workplan will be performed under the direction of a California <br /> Registered Professional Engineer. All work will be performed in accordance with ATC's Site <br /> Safety Plan (SSP) and Quality Control/Quality Assurance Plan already on file with PHS/EHD for <br /> this site. <br /> Projected Schedule <br /> Once approval of this workplan has been received, ATC will confirm a schedule for drilling <br /> activities. ATC will notify PHS/EHD at least 48 hours prior to beginning any field activities. The <br /> summary report will be submitted to PHS/EHD approximately four to five weeks after the <br /> completion of field activities. <br /> wA 7292.00a2 \.,p.dw 3 <br />