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FIGURE 5 <br /> Monitoring Well Sampling.Protocot. Scheaiatie: , <br /> Sampling_Crew Reviews Project` <br /> Sampting Requirements/Schedule <br /> Field Decontamination and <br /> 1 Instrumentation.Calibration <br /> I <br /> Check Integrity'of Well. <br /> (inspect for!WelL.Damage), <br /> Measure and Record Depth to�Water <br /> and.iota I' WeLL Depth - <br /> (Electric Well Sounder) <br /> Check for Floating. Product <br /> (Oil/Water Interface Probe) <br /> y Floating Product Present Floating Product Not Present <br /> Confirm Product Thickness Putrge Volume Calculation <br />{ <br /> (Acrylic or:PVC Bailer) V 7P(r/12) h(_X-vol)(7.48)= /gallons <br /> Collect Free-Product Sample V. Purge volume (gallons) <br /> 7'= 3.14159 <br /> Dissolved Product Sample Not h = Height of Water Colun•(feet) <br /> Required r- Borehole radius "(inches) <br /> Record Data on field Data: Form - Evacuate water. from well equal to the calculated purge volume while <br /> f monitoring groundwater stabilization indicator parameters (pH, <br /> 4 <br /> conductivity,.temperature), at intervals of one casing volume. <br />}} all Dewaters after One Purge Volume Well.Readi.ly Recovers <br />! (Low yield well) . <br /> Well Recharges to 80% of Initial 'RecordaGroundwater Stability Indicator <br /> j Measured Water,Column Height in Parameters from each Additional Purge Volume <br /> :Feet within 24 hrs.-of Evacuation. Stability indicated when the following Criteria are met: <br /> I <br /> Measure Groundwater Stability Indicator pN ± 0.1.pH units. <br /> 'Parameters (pH, Temperature, Conductivity) Conductivity: : 10% <br /> I 'Temperature: 1.0 degrees F <br /> Collect Sample and Complete Groundwater Stability Achieved Groundwater Stability Not Achieved <br /> 4hain-of-Custody . <br /> Collect Sample and Complete Continue Purging Until Stability <br />! Chain�of-Custody is Achieved- <br /> i I I <br /> Preserve Sample According to Required Preserve Sample.According RColtect Sample and complete <br /> Chemical Analysis to Required Chemical Analysis Chain-of=Custody <br /> Preserve Sample According to Required <br /> Chemical Analysis <br /> Transport to Analytical Laboratory Transport to Analytical .Laboratory. Transport to Analytical Laboratory <br /> 1V ' <br /> i . . <br />