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V <br /> Sampling Crew Reviews Project <br /> Sampling Requirements, Schedule <br /> 60 Field Decontamination 8 <br /> Instrument Calibration <br /> ,r Check Integrity of Well <br /> (Inspect for Well Damage) <br /> Measure 8 Record Depth to Water <br /> 6d and Total Well Depth with <br /> Interface Probe <br /> Measure Floating Product Thickness <br /> 6W with Interface Probe <br /> Floating Product Not Present <br /> or Visible Product Sheen Oniy <br /> Floating Product Present <br /> Check Visible Water <br /> r. Confirm Product Thickness Purge Volume Calculation <br /> with Clear Bailer <br /> V = n(r/12) 2 h(X vol)(7.48) = _gallons <br /> Collect Free ProductSam le V = purge volume (gallons) <br /> Dissolved Product Sample Not Required rr = 3.14 <br /> r = inner well radius (inches) <br /> h = water column height (feet) <br /> Record Data on Field X = desired number of casing volumes <br /> `r Sampling Data Shset <br /> Evacuate water from well equal to the calculated <br /> purge volume while monitoring groundwater <br /> V <br /> stabilization parameters (if appropriate) at <br /> Intervals of one casino volume <br /> Well Dewaters After One Purge Volume Well Readily Recovers <br /> (low yield well) <br /> If appropriate, record groundwater stability <br /> Well Recharges to 70% of Initial parameters with each purge volume. Stability <br /> Measured Water Column Height is indicated when the following arteria are met: <br /> �+ pH =t 0.2; Conductivity = t 10%; <br /> Measure Groundwater Stability <br /> Indicator Parameters Temperauture = t 1.0 °C <br /> If Appropriate <br /> Collect and Preserve Sample Groundwater Stability Achieved Groundwater Stability <br /> According to Required Chemical <br /> Analysis Collect Sample & Complet <br /> rr1 Chain-of-Custody Continue Purging Until <br /> Complete Chain of Custody Stability is Achieved <br /> ransport to Analytical Laboratory or a Maximum of 10 Well Volumes <br /> Transport to Analytical Laboratory Collect Sample 8 Complete <br /> V <br /> Chain-of-Custody <br /> ransport to Analytical Laboratory <br /> E <br /> R®-MNMENTAL <br /> PLATE A-3 <br /> N LOGIES, INC. WATER SAMPLING <br /> FLOWCHART <br /> 6a <br />