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7 32 1 Operation the same as for a submersible pump (Section <br />' <br /> 732 1) <br /> I Determine the volume of water to be purged <br /> as described in 8 0 Calculations 3 Be sure to adjust flow rate to prevent violent <br />' bolting of the hose as sample is drawn in <br /> 2 Lay plastic sheeting around the well to <br /> prevent contamination of pumps, hoses or 73 4 Suction Pumps <br /> lines with foreign materials <br />' There are many different types of suction pumps <br /> 3 Assemble pump,hoses and safety cable, and They include centrifugal, peristaltic and diaphragm <br /> lower the pump into the well Make sure the Diaphragm pumps can be used for well evacuation at <br /> pump is deep enough so all the water is not a fast pumping rate and sampling at a low pumping <br />' evacuated (Running the pump without water rate The peristaltic pump is a low volume pump that <br /> may cause damage ) uses rollers to squeeze the flexible tubing thereby <br /> creating suction This tubing can be dedicated to a <br />' 4 Attach flow meter to the outlet hose to well to prevent cross contamination Peristaltic <br /> measure the volume of water purged pumps,however,require a power source <br /> 5 Use a ground fault circuit interrupter(GFCI) 7 3 4 1 Operation <br /> t or ground the generator to avoid possible <br /> electric shock 1 Assembly of the pump, tubing, and power <br />' b Attach power supply, and purge the well source if necessary <br /> until the specified volume of water has been 2 Procedure for purging with a suction pump is <br /> evacuated(or until field parameters, such as exactly the same as for a submersible pump <br /> temperature, pH, conductivity, etc, have (Section 7 3 2 1) <br /> stabilized) Do not allow the pump to run <br /> dry If the pumping rate exceeds the well 7 3 5 Inertia Pumps <br /> recharge rate,lower the pump further into the <br /> well, and continue pumping Inertia pumps such as the WaTerra pump and piston <br />' pump, are manually operated They are most <br /> 7 Collect and dispose of purge waters as appropriate to use when wells are too deep to bail by <br /> specified in the site specific sampling plan hand, or too shallow or narrow (or inaccessible) to <br />' <br /> 7 3 3 Non-Contact Gas Bladder Pumps warrant an automatic(submersible,etc)pump These <br /> pumps are made of plastic and may be either <br /> For this procedure, an all stainless-steel and Teflon decontaminated or discarded <br />' Mtddleburg-squeeze bladder pump (e g , IEA, 73 5 1 Operation <br /> TIMCO,Well Wizard,Geoguard, and others) is used <br /> to provide the least amount of material interference to 1 Determine the volume of water to be purged <br />' the sample (Barcelona, 1985) Water comes into as described in 8 0,Calculations <br /> contact with the inside of the bladder(Teflon) and the <br /> sample tubing, also Teflon,that may be dedicated to 2 Lay plastic sheeting around the well to <br /> each well Some wells may have permanently prevent contamination of pumps or hoses <br />' installed bladder pumps, (i e , Well Wizard, with foreign materials <br /> Geoguard), that will be used to sample for all <br /> parameters 3 Assemble pump and lower to the appropriate <br />' <br /> 7 3 3 1 Operation depth in the well <br /> 4 Begin pumping manually, discharging water <br /> 1 Assemble Teflon tubing, pump and charged into a 5 gallon bucket (or other graduated <br />' control box vessel) Purge until specified volume of <br /> water has been evacuated (or until field <br /> 2 Procedure for purging with a bladder pump is parameters such as temperature, pH, <br /> I 8 <br /> I <br />