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V <br /> • <br /> SMTN <br /> V <br /> V <br /> 5.3 Well Surveying, Monitoring, Development, and Sampling <br /> W1 <br /> The top of the new wellheads will be surveyed for vertical and lateral control. Measurement <br /> of depth to water in the wells will be completed to evaluate the direction and magnitude of the <br /> groundwater gradient beneath the site. The new wells will be developed using pumping and <br /> surge and bail techniques until the produced water is free of relatively sediment. A minimum <br /> �. of three well volumes (casing and sandpack) will be purged from each well prior to collecting <br /> groundwater samples. Temperature, pH, water elevation, and electric conductivity will be <br /> monitored and allowed to stabilize. Water samples will be collected using disposable bailers, <br /> one dedicated to each well. Groundwater samples collected from all monitoring wells will be <br /> submitted using chain-of-custody record to a State-certified laboratory for analysis of TPHg <br /> V <br /> and BTEX using EPA methods 8015 (modified) and 8020, respectively. Purged water will be <br /> stored in 55-gallon drums approved for hazardous liquid storage pending laboratory analyses. <br /> V <br /> 5.4 Report Preparation <br /> V <br /> A PAR will be prepared for submittal to PHS/EHD. The report will summarize field and <br /> laboratory procedures as well as all collected data. The lateral and vertical extent of soil and <br /> groundwater contamination will be defined to the degree possible and recommendations for <br /> additional investigation if necessary will be included in the PAR. <br /> 6o <br /> 5.5 Quarterly Groundwater Monitoring, Sampling and Reporting <br /> Vr <br /> This task includes quarterly monitoring and sampling of three wells (MW-1 through MW-3) <br /> �• for three additional calendar quarters, if necessary. Field activities will consist of measuring <br /> depth to water and depth to bottom in each well. Depth to water measurements will be used to <br /> determine the groundwater elevation and groundwater flow direction beneath the project site. <br /> Wells will be monitored for the presence of free product. Water samples will then be collected <br /> from each well after purging a minimum of three casing volumes of groundwater. The <br /> samples will be sent using chain-of-custody record to a State-certified laboratory for analysis <br /> of TPHg and BTEX using EPA methods 8015 (modified) and 8020. Samples will be analyzed <br /> V <br /> 95122\WP-0695.doc 4 <br /> L <br /> bw <br />