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CA ARNG Field Quality Assurance Project Plan <br /> Dedicated Submersible Pump <br /> 9.1.5.7 The dedicated electric submersible pump systems installed in CA ARNG groundwater <br /> monitoring wells consist of 2-inch diameter Grundfos®Redi-Flo2 pumps.Typically,the pump intakes <br /> are set in the middle of the screen interval and/or adjacent to the most permeable layer of the formation <br /> within the screened interval of the well.Pumps installed in wells that typically pump dry are set <br /> approximately 2 feet above the bottom of the well screen. <br /> 9.1.5.8 Flow during purging and sampling is controlled using a portable Grundfos®voltage regulator. <br /> The Gmndfos®Redi-Flo2 pumps are capable of pumping rates as low as 0.03 gpm(0.1 liters per minute <br /> [lpm])and up to 10 gpm(26.41pm).Each dedicated submersible pump system has a dedicated discharge <br /> hose that is stored inside the well head,and is used to direct purged water discharge and collect samples. <br /> Water is discharged into a wastewater container.The equipment required to purge and collect <br /> groundwater samples are: <br /> • Grundfos®voltage regulator; <br /> • Electrical generator; <br /> • Water level,PID,pH,temperature,specific conductivity,and turbidity meters; <br /> • Plastic buckets; <br /> • Wastewater container and garden hose;and <br /> • Sample truck. <br /> Dedicated Submersible Pump Pre-Sampling Procedures <br /> 9.1.5.9 Prior to initiating well purging,all sampling equipment that may come into contact with well <br /> water are decontaminated following the procedure described in Section 9.3 of this field QAPP. <br /> I. Measure static water level in the well casing to determine the minimum volume of water needed to <br /> be purged from the well prior to the collection of groundwater samples.Water level measurements <br /> are measured to the nearest 0.01 foot using an electronic water level sounder.Water levels are <br /> recorded on the groundwater sampling data sheet. <br /> 2. Attach the portable Grundfos® voltage regulator to the pump and power supply,and start the <br /> generator. <br /> 3. Attach the discharge hose to the garden hose and place the opposite end of the garden hose in the <br /> wastewater container.To prevent siphoning,make sure that the hose is not submerged in water in the <br /> wastewater container. <br /> 4. Turn the pump on using the switch on the voltage regulator and set the preferred flow rate. <br /> 5. If performing macropurge,follow the purge volume calculation procedures shown in the Portable <br /> Submersible Pump Pre-Sampling Procedures in Section 9.1.5.6. <br /> field QAPP.DOC 9-6 May 2000 <br />