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Sampling Crew Reviews Project <br /> Sampling Requirements. Schedule <br /> Field Decontamination 8 <br /> Instrument Calibration <br /> Check integrity of Well <br /> (Inspect for Weil Dame e) <br /> Measure & Record Depth to Water <br /> and Total Well Depth with <br /> Interface Probe <br /> Measure Floating Product Thickness <br /> with Interface Probe <br /> Floating Product Not Present <br /> or Visible Product Sheen Only <br /> Floating Product Present <br /> Check Visible Water <br /> Confirm Product Thickness Purge Volume Calculation <br /> with Clear Bader <br /> V x(r/12) 2 h(X vol)(7 48) _ _gallons <br /> Collect Free Product Sam le V = purge volume (gallons) <br /> n = 314 <br /> Dissolved Product Sam le Not Regwired r = Inner well radius (inches) <br /> h = water column height (feet) <br /> Record Data on Field X = desired number of casincl volumes <br /> Sampling Data Sheet <br /> Evacuate water from well equal to the calculated <br /> purge volume while monitonng groundwater <br /> stabilization parameters (if appropriate) at <br /> Intarvals of one casing volume <br /> I <br /> Well Dewaters After One Purge Volume Well Readily Recovers <br /> (low geld well) <br /> If appropriate, record groundwater stability <br /> Weil Recharges to 80% of Inmal parameters with each purge volume Stability <br /> Measured Water Column Height is indicated when the following criteria are met <br /> Measure Groundwater Stability pH = 0 2, Conductivity = t 10%, <br /> Indicator Parameters I Temperauture = 10 °C <br /> If Appropriate <br /> Collect and Preserve Sample Groundwater StabiliftyAfchieved Groundwater Stability <br /> According to Required Chemical hieved <br /> Analysis Collect Sample & Compiet <br /> Chaln-of-Custody Continue Purging Until <br /> Complete Chain of Custody Stability is Achieved <br /> ansport to Analytical Laboratory <br /> rF [or Maximum of 10 Wel} Volumes <br /> ransport to AnalyticalLaborato Collect Sample &'Complete <br /> I Chai n-of-Custody <br /> 1 , , i I <br /> i <br /> ransport to Analytical Laborato <br /> 1 1 ry <br /> I HY�R `, ' 1 <br /> ENV1R <br /> 16 NMENTAL I <br /> I �I! I <br /> !` 1 ,l 111 ,' PLATE A-3 <br /> TECHN d LOGIES, INC. WATER SAMPLING <br /> �LWCIiIART <br />