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-7- <br /> the well goes dry (whichever comes first) . <br /> e. Measure the volume of purged water in the holding <br /> tank . Volume measurements are to be taken at the <br /> time of monitoring measurements (cond. , pH, and <br /> temp. ) and at the end of purging. <br /> f. Drain the water into one of the refinery <br /> separators, or the oily water drains located <br /> throughout the refinery. <br /> g. Inform the sampling team when purging is <br /> complete. <br /> 1 . 3 . 4 "B, " "C, " and "D"-zone Wells <br /> a. Follow steps 1 . 3 .1 a. through g. and 1. 3. 2 a . <br /> and b. <br /> . If the well has a dedicated bladder pump, set up <br /> hoses and controller to purge with compressed air . <br /> Follow the vendor ' s operating instructions . <br /> . If the well does not have a dedicated pump, run a <br /> portable (decontaminated) bladder pump and hose <br /> down to the water surface to purge. Follow the <br /> vendor ' s operating instructions. <br /> b. Measure the flow rate from the pump. <br /> C. Follow steps 1 . 3. 3 d. through g. <br /> 1 . 4 CLEANING/DECONTAMINATION PROCEDURE <br /> (Pumps and Hoses) <br /> 1 . 4 . 1 Clean the plastic hose and pump after each purging. <br /> 1 . 4 . 2 If hydrocarbons were present, flush the interior of <br /> the pump and hose with hexane solvent before deter- <br /> gent washing. <br /> 1 . 4 . 3 Prepare a solution of detergent according to the <br /> instructions on the manufacturer ' s carton. <br /> 1 . 4 . 4 Clean the interior of the pump and hose by running <br /> 20-L of detergent solution through the interior. <br />