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r ` <br /> • -$��o • <br /> - CLEARWATER <br /> C K 0 U P [ \ C <br /> E a ira n in rn tan S'r IC' <br /> 2 3 Well Development,Surveying,and Gauging <br /> The three monitoring wells will be developed no sooner than 48 hours after installation has been <br /> completed Well development will be accomplished by surging and bailing a minimum of 10 well <br /> volumes from each well Groundwater pH, conductivity, and temperature will be monitored during <br /> development, and samples will be collected after the parameters have stabilized Groundwater <br /> samples will be placed in laboratory-supplied containers, stored in an ice cooler, and transported to a <br /> state-certified laboratory Efforts will be made to combine the sampling of the new wells with the <br /> existing wells (MW-1, -2, and-3) during the scheduled quarterly groundwater sampling event <br /> The top of casing on each monitoring well will be surveyed relative to an established site datum <br /> Water levels will be gauged in each monitoring well and recorded (water level measurements will be <br /> accurate within 0 01 foot) <br /> 2 4 Chemical Analyses of Soil and Groundwater Samples <br /> As discussed with Ms Lori Duncan of the EHD, based on previous sampling results, the chemicals of <br /> concern are gasoline constituents, therefore, analysis of TPH as diesel will be discontinued Soil <br /> samples collected during drilling will be analyzed for TPHg (EPA Method 8015) and BTEX with <br /> methyl tert-butyl ether (MTBE) (EPA Method 8020) Water samples will be analyzed for TPHg, BTEX <br /> and five Fuel Oxygenates (EPA Method 8260 or 8240) <br /> . 2 5 Characterization of Investigation-Derived Waste <br /> Soil and water generated during the drilling and purging of the three monitoring wells will be placed in <br /> drums onsite until analytical results have been received The soil and water will be disposed of at an <br /> appropriate facility, the method of disposal will depend upon chemical concentrations detected in the <br /> waste <br /> 3 0 PROJECT REPORT <br /> Following the installation of the monitoring wells, a report will be submitted to present the results of <br /> the soil and groundwater investigation The report shall be signed by an appropriately registered or <br /> certified professional in the state of California, and shall contain the information listed below <br /> • Text describing the investigative methods <br /> • Summary of analytical results and interpretation of findings <br /> • Geologic boring logs and well completion diagrams <br /> • Tables presenting soil and groundwater analytical results <br /> • flaps depicting contaminant distribution in groundwater and the direction of groundwater flow <br /> C-178 WP 3 November 18,1998 <br />