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�04`7 16 Apr 06 '88 9; >... <br /> rl <br /> development time has elapsed. The water discharge from the well <br /> development will be handled by the Ragu plant stormwater drainage <br /> g..' system and the discharge will not need to be contained or require <br /> = : special treatment or handling. Discharge rates typically could <br /> reach 60 qpm for up to 1 hour in duration. During well develop- <br /> ment, the pumping rate of each well will be determined. This <br /> pumping rate will then be used in designing the sampling program <br /> for each well. Following develojsment, the wells will remain idle <br /> for a week prior to sampling. Prior to sampling, a standardized <br /> well sampling log will be prepared and used to record pertinent <br /> data collected during sampling. <br /> At the time of water sampling, the wells will first be checked <br /> for the existence of a floating product layer by the use of a <br /> clear acrylic product bailer. If no product is found, then the <br /> ';•: depth to water will be measured and recorded. Using the depth to <br /> . � <br /> water measurement, the volume of water in the well and the . <br /> required purge volume will be calculated and recorded. It is <br /> A. :: proposed to purge three (3) well casing storage volumes prior to <br /> d collection of the water samples The well will be purged with a 4 <br /> inch submersible pump. The pump will be thoroughly cleaned prior <br /> to use with a high pressure potable water spray rinse, and will <br /> be cleaned after each well is purged in the same fashion. Well <br /> yield will control placement of the pimp during purging. If the well yield is greater than the pump will discharge rate, then the. <br /> pump will be placed at the top of water column in the well . If = <br /> the pump discharge rate is greater than the well yield, then the <br /> pump will be placed about mid-height in the well water column, <br /> <` such that, the water level in the well is drawn down to the pump <br /> k <br /> intake. For low yield wells, it may be necessary to install a <br /> flow control valve on the pump discharge line. A record of the <br /> purging activities will be kept in the sampling log book. In the <br /> last moments of well purging, the pH, temperature, and conductiv- <br /> ity of the water will be measured and recorded in the sampling ' <br /> log. [ince the wells have been purged, the pump will be pulled <br /> from the well. The volume of water purged, the pump discharge ' <br /> rate, depth of pump setting, and the start and finish time of <br /> purging will be recorded in the sample: log. Water samples will be <br /> collected by a point source sampling device (a teflon bailer) as <br /> soon as practicable after purging. Samples will be stored in the <br /> appropriate container, and promptly chilled to 4 C. Water <br /> samples will be delivered to the laborato�-v within 24 hours after <br /> sample collection. The depth of sample collection, time of sample <br /> collection, sample collection method, type of sample containers, <br /> sample preservation methods used, sample number, and names of <br /> x. <br /> persons collecting samples will be entered into the sample log. -§ <br /> If floating product is found on the top of the water column, the <br /> thickness of the layer will be determined by the use of a clear <br /> s <br />