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• down the side of a clean ,lar and fill the prelabeled sample container in a carrier <br /> sample bottles from the far <br /> 5 Replace the well cap <br /> 5 Cap the sample container tightly and place <br />' prelabeled sample container in a carrier 6 Log all samples in the site logbook and on <br /> field data sheets and label all samples <br /> 6 Replace the well cap <br /> 7 Package samples and complete necessary <br />' 7 Log all samples in the site logbook and on paperwork <br /> the field data sheets and label all samples <br /> 8 Transport sample to decontamination zone <br /> 8 Package samples and complete necessary for preparation for transport to analytical <br />' paperwork laboratory <br /> 9 Transport sample to decontamination zone 9 On completion, remove the tubing from the <br />' for preparation for transport to the analytical well and either replace the Teflon tubing and <br /> laboratory bladder with new dedicated tubing and <br /> bladder or rigorously decontaminate the <br /> 10 Upon completion, remove pump and existing materials <br /> assembly and fully decontaminate prior to <br /> setting into the next sample well Dedicate 10 Nonfiltered samples shall be collected <br /> the tubing to the hole directly from the outlet tubing into the <br />' sample bottle <br /> 7 4 3 Non-Contact Gas Bladder Pumps <br /> 11 For filtered samples,connect the pump outlet <br /> The use of a non-contact gas positive displacement tubing directly to the filter unit The pump <br /> liebladder pump is often mandated by the use of pressure should remain decreased so that the <br /> dedicated pumps installed in wells These pumps are pressure build up on the filter does not blow <br /> also suitable for shallow (less than 100 feet) wells out the pump bladder or displace the filter <br /> They are somewhat difficult to clean,but may be used For the Geotech barrel filter, no actual <br /> with dedicated sample tubing to avoid cleaning connections are necessary so this is not a <br /> These pumps require a power supply and a concern <br /> compressed gas supply(or compressor) They may be <br />' operated at variable flow and pressure rates making 744 Suction Pumps <br /> them ideal for both purging and sampling <br /> In view of the limitations of these type pumps, they <br /> Barcelona (1984) and Nielsen (1985) report that the are not recommended for sampling purposes <br /> non-contact gas positive displacement pumps cause <br /> the least amount of alteration in sample integrity as 7 4 5 Inertia Pumps <br /> compared to other sample retrieval methods <br /> Inertia pumps may be used to collect samples It is <br /> 7 4 3 1 Operation more common, however, to purge with these pumps <br /> and sample with a bailer(Section 7 4 1) <br /> 1 Allow well to recharge after purging <br /> 2 Assemble the appropriate bottles 7 4 5 1 Operation <br /> 1 Following well evacuation, allow the well to <br /> I 3 Turn pump on, increase the cycle time and recharge <br /> reduce the pressure to the minimum that will <br /> allow the sample to come to the surface 2 Assemble the appropriate bottles <br /> 4 Cap the sample container tightly and place 3 Since these pumps are manually operated, <br /> 10 <br />