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Newmont,., CRIPPLE CREEK & VICTOR <br /> PO Box 191 <br /> CRIPPLE CREEK « VICTOR 100N.3"Street <br /> Victor CO 80860 <br /> 9.2. Filtering Samples <br /> A ground water sample to be analyzed for dissolved metals must be passed <br /> through a 0.45 micron membrane filter prior to preservation. For the <br /> determination of total metals the sample is not filtered. As a general guideline, <br /> ground water (wells) samples requiring a metals analysis should be filtered and <br /> analyzed for dissolved metals, while surface water samples requiring a metals <br /> analysis should be unfiltered and analyzed for total metals. Samples requiring <br /> analysis for organics should not be filtered. Specify on the Newmont chain of <br /> custody whether or not the samples have been filtered. <br /> 9.3. Sample Preservation and Storage <br /> Sample preservation is intended to retard breakdown of the constituents within <br /> the sample. Preservation methods include pH control, chemical control, <br /> temperature control, and protection from light. Common sample preservation <br /> • measures include the following: <br /> To avoid changes in the concentration or physical state of the constituent to be <br /> analyzed, preserve accordingly, and pack samples in Blue Ice in the field and when <br /> shipping. Samples should be stored in a locked refrigerator and shipped to the <br /> laboratory as soon as possible. As samples are transferred to the storage <br /> refrigerator, a double check that the lids are securely tightened is conducted. <br /> 9.4. Sample Handling and Custody <br /> The contracted laboratory will provide necessary coolers, sample bottles, chain- <br /> of-custody (COC) forms, and shipping labels. After sample collection, samples will <br /> be stored in a refrigerator and shipped to the laboratory as soon as possible and <br /> within allowable holding times. Samples will be cooled to <_4°±2°C. Sample <br /> containers will be packed to prevent breakage or contamination during shipment. <br /> 9.5. Chain of Custody Procedures <br /> Chain of custody procedures will allow for the tracking of individual samples from <br /> the time of collection through laboratory analysis. All records relating to chain of <br /> IIIcustody documentation are to be made in ink. If errors are made on any of these <br /> documents, corrections are to be made by crossing a single line through the <br /> Department THIS DOCUMENT IS UNCONTROLLED IN HARD COPY FORMAT Doc Id: <br /> SER Date of This Issue--/--/-- Date of Next Review:--/--/-- Page 26 of 73 <br />