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<br />Water samples will be collected from the pipeline inside the manholes at P-1 and P-2 sampling <br />locations. To avoid confined space entry, the sample will be collected remotely using a pole <br />with a sample jaz attached to the end of the pole. Discharge will be measured directly at the <br />time of sampling by reading the water level on the weir installed at each manhole. Direct <br />dischazge measurements will be taken at stations UN-1, RC-1, and RC-2 at the time water <br />samples aze collected. Each water sample should have a corresponding dischazge. The only <br />exception to this procedure is pond sampling when no dischazge is occurring. <br />Surface water samples and dischazge measurements for Roan Creek (RC-1 and RC-2) and the <br />unnamed tributary (UN-1) will be collected at the same general location of the stream channel. <br />Measuring and sampling locations will be selected based on the following stream <br />characteristics: <br />• A section with rock riffle or some other channel characteristic providing a <br />section control <br />• A relatively uniform cross section with water flowing at both banks <br />• A section with a steady velocity distribution of which mixing of the water <br />column is complete. <br />Sampling/measurement sections may be relocated upstream or downstream of the proposed <br />sites to allow safer wading andlor more accurate streamflow measurements provided there aze <br />no obvious seep or tributary inflows that may adversely affect water quality sampling <br />objectives. If field measurements and/or visual observations indicate that lateral or vertical <br />mixing of water within the channel is not wmplete, the sampling site may be relocated <br />upstream or downstream of the proposed site provided that water quality sampling objectives <br />are not adversely affected. <br />2.4.3 Sampling Methodology <br />Water samples will be collected using either the grab method or the depth integrated-equal <br />width increment method (ilSGS, 1977). For pipe outfalls, pipelines, and ponds a single grab <br />sample will be collected. For streams less than approximately 0.5 ft deep and 3 ft wide, a <br />single grab sample will be collected from the center of the channel. If the channel is more <br />than 0.5 ft deep and 3 ft wide, depth integrated samples will be collected at equal widths <br />across the channel and composited. <br />14 <br />