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Preparation/Analytical Method Verification <br /> The SOP stated above has been prepared based on technical research and testing conducted by <br /> GEL Laboratories, LLC and with guidance from the regulatory documents listed in this <br /> "Method/Analysis Information" section. <br /> System Configuration <br /> The Hardness as CaCO3 is calculated from Calcium and Magnesium results. <br /> The Metals analysis-ICP was performed on a P E 4300 Optima radial/axial-viewing inductively <br /> coupled plasma atomic emission spectrometer. The instrument is equipped with a Burgener <br /> nebulizer, cyclonic spray chamber, and yttrium or scandium internal standard. Operating <br /> conditions for the ICP are set at a power level of 1500 watts. The instrument has a peristaltic <br /> pump flow rate of 1 AL/min, argon gas flows of 15 L/min and 0.2 L/min for the torch and <br /> auxiliary gases, and a flow setting of 0.65L/min for the nebulizer. <br /> The Metals analysis - ICPMS was performed on a Perkin Elmer ELAN 9000 inductively coupled <br /> plasma mass spectrometer (ICP-MS). The instrument is equipped with a cross-flow nebulizer, <br /> quadrupole mass spectrometer, and dual mode electron multiplier detector. Internal standards of <br /> scandium, germanium, indium, tantalum, and/or lutetium were utilized to cover the mass <br /> spectrum. Operating conditions are set at 1400W power and combined argon pressures of 360+/- <br /> 7 kPa for the plasma and auxiliary gases, and 0.85 L/min carrier gas flow, and an initial lens <br /> voltage of 5.2. <br /> The Metals analysis-Mercury was performed on a Perkin-Elmer Flow Injection Mercury System <br /> (FIMS-100) automated mercury analyzer. The instrument consists of a cold vapor atomic <br /> absorption spectrometer set to detect mercury at a wavelength of 253.7 nm. Sample introduction <br /> through the flow injection system is performed via a peristaltic pump at 9 mL/min and nitrogen <br /> carrier gas rate of 80 mL/min. <br /> Calibration Information <br /> Instrument Calibration <br /> All initial calibration requirements have been met for this sample delivery group (SDG). <br /> CRDL Requirements <br /> The initial CRDL standards met the advisory control limits except for potassium. <br /> ICSA/ICSAB Statement <br /> All interference check samples (ICSA and ICSAB) associated with this SDG met the established <br /> acceptance criteria. <br /> Continuing Calibration Blank (CCB) Requirements <br /> The continuing calibration blanks (CCB) bracketing this batch met the established acceptance <br /> criteria for all applicable analytes except for potassium. The bracketing blank potassium <br /> concentration was slightly above the PQL; however client sample concentrations for potassium <br /> were greater than five times the contaminated blank. <br /> Page 19 of 94 <br />