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The Leodville Mill <br />QUALITY CONTROL <br />Environmental Sampling Procedures <br />Water Sample Collection <br />Page 2 -11 <br />• Sample should be analyzed as soon as possible after collection for best <br />results. <br />• Exclude unrepresentative particles such as leaves, sticks, or large solids. <br />• Glass bottles are desirable. Plastic bottles are satisfactory provided that the <br />material in suspension in the sample does not adhere to the walls of the <br />container. Store samples that are likely to contain iron or manganese so that <br />oxygen will not come into contact with the water. Analyze these samples <br />promptly to minimize the possibility of chemical or physical change during <br />storage. <br />2.4.10 SULFATE <br />APPARATUS & MATERIALS <br />• Polyethylene or glass bottles. <br />SAMPLE COLLECTION, PRESERVATION & HANDLING: <br />• Store samples at approximately 4 °C. <br />• Samples must be analyzed within 28 days of collection. <br />QUALITY CONTROL <br />In the presence of organic matter, certain bacteria may reduce sulfate to <br />sulfide. To avoid this, samples should be stored at or below 4 °C. <br />2.5 GROUND WATER MONITORING WELL COMPLETION DETAIL <br />2.5.1 MONITORING WELL COMPONENTS <br />The principal reason that monitoring wells are constructed is to collect groundwater <br />samples that, upon analysis, can be used to delineate a contaminant plume and track <br />movement of specific chemical or biological constituents. A secondary consideration <br />is the determination of the physical characteristics of groundwater flow system to <br />establish flow direction, transmissivity, quantity, etc. The spatial and vertical <br />locations of monitoring wells are important. Of equal importance are the design and <br />construction of monitoring wells that will provide easily obtainable samples and yield <br />reliable, defensible, meaningful information. It follows that an understanding of the <br />April 2013 <br />