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CLEARWATER ' <br /> G R O U P, I N C. <br /> Tall traffic cones and caution tape will be used to.surround the pumping well <br />` and associated equipment. Traffic cones will also be set over each well that <br /> will be monitored during the test. - The discharge hose and all power cords <br /> will be secured to the ground using duct tape. If work is to be performed in' <br /> the street,' an appropriate traffic control.plan will be. established prior to <br /> beginning work. . <br /> FIELD-PROCEDURES <br /> IAt least 24 hours prior to the test, a pre-test (step test) will be performed to:, ; <br /> determine the appropriate flow rate to be used. The ..step test will be , <br /> conducted in the same well to be used for the discharge test. Each step will <br /> consist of pumping groundwater from the well at aconstant -rate until the <br /> water level stabilizes or the well goes dry. The initial step will be conducted at <br />' the lowest flow rate.. The flow-rate will be increased in each-subsequent step <br /> until_.the.-maximum_-flow -rate:..that:-can be_ maintained by the°°well:-carr-be <br /> estimated. <br /> i . <br /> Pnor.to the start of work, a decontamination.-area will be established: This <br /> will be in a secured area and consist of an Alconox solution wash, a first rinse <br /> and a second rinse. Any.down hole equipment will be decontaminated prior <br />' to use. Prior to equipment set-up, all wells to be monitored during the test, <br /> will be opened. Once the water level within each well has stabilized, the <br /> I wells will be measured with an- electronic water sounder to the nearest ±0.01' . <br /> foot. After all equipment is set-up, as outlined- in the previous section, the <br /> water level within each well will be measured again and the time will be <br />' noted. This will be used as the initial water level reading. <br /> Prior to starting the pump, the .total gallons displayed on-the flow meter will <br />' be recorded. This will be used to determine the total number of gallons <br /> extracted from the pumping well. Once the pump is turned on, the exact time <br /> will be recorded. The control box will be immediately set to the flow rate <br />' established during the pre-test. ' The water level within each well will be <br /> measured continuously for the first 30 minutes of the test. For sites with <br />' more than ten monitoring wells, only those wells in the vicinity of the <br /> pumping well,.up to 60 feet away, will be-monitored for the first 30 minutes. <br /> The exact time will-be recorded for each measurement taken. After the first <br /> 30 minutes, the water level within all wells to be monitored will be measured <br /> every 15 minutes until 90 minutes has elapsed since the test began. At this <br /> time the interval between measurements will be increased to every <br />' 30 minutes. This will continue until six hours has elapsed since the test <br /> Constant-Discharge Aquifer Test Page 2 of 5 December 16,1994 <br />