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1 <br /> ' may be submitted to ensure sample integrity. Blanks and duplicate samples will be labeled, <br /> stored, and handled identically to all other samples. <br /> • Water samples for heavy metal or inorganic constituents will be sampled as described above <br /> in Section 3.3. <br /> • On-site determinations for pH, conductivity, temperature, and dissolved oxygen will be <br /> conducted at each site. Field observations will be recorded for sample source, width and <br /> depth, turbulence and aeration, suspended or organic material, precipitates or algae, bedrock <br /> geology, vegetation, and possible contaminants. <br /> These surface sampling procedures are designed to: <br /> • ensure that surface water samples are representative. <br /> i <br /> • ensure that all sample descriptions and field observations are consistent and <br /> accurate. <br /> ' minimize the risk of cross-contamination between samples. <br /> 3.5 Free Product Monitoring and Sampling <br /> • When present, the free product thickness will be monitored using a clear PVC bailer. The <br /> free product thickness and ground water level will recorded on Well Monitoring forms. <br /> • Any equipment used in wells containing free product will not be used in other wells to <br /> I ' prevent cross-contamination. <br /> • All free product removals will be described on Free Product Removal forms. <br /> These procedures are designed to: <br /> ' ensure that all free product thicknesses, descriptions, and field observations are <br /> consistent and accurate. <br /> t minimize the risk of cross-contamination to wells without freer <br /> p oduct. <br /> 3 <br /> 4 <br /> American Geological Services, Inc. <br /> 7 <br />