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i, <br />4.6.6.5 WATER SAMPLING TECHNIQUES <br />Preservation Methods - All laboratory water samples are taken in bottles <br />provided by the licensed local laboratory. Preservative solutions are added <br />to those sample bottles, which require a preservative, by the lab. Dissolved <br />parameter samples will be filtered prior to adding preservatives. The lab <br />samples are to be transported to the lab on the same day the sample is taken. <br />If the samples cannot be transported to the lab on the sampling day, they are <br />refrigerated until they can be delivered to the lab. Field parameters are <br />sampled at the site with a Horiba water quality meter. <br />Ground Water Sampling - The water level depths are measured by using a <br />tape measure or an electronic water level indicator, depending on water depth. <br />water levels are measured from the top of the well casing or top of the <br />housing depending on the water station. The well is then evacuated by using a <br />6 foot long, 2,5 inch diameter PVC evacuator tube. After the well refills, <br />the evacuator tube is lowered into the well to retrieve a sample. The sample <br />is discharged into a plastic bucket from which the sample bottles are filled. <br />A Horiba water quality meter is then immersed into the bucket to measure the <br />field parameters. <br />Surface Water Sampling - Sample bottles are filled directly from the <br />stream when possible, otherwise they are filled from a sample bucket, before <br />measuring field parameters. When necessary, a plastic bucket is submerged <br />into the stream and filled. The Horiba water quality meter is then immersed <br />into the bucket to measure field parameters. <br />NPDES Sampling - At these points, water depths are measured with a tape <br />measure or a staff gauge, depth is then converted to flow. Sample bottles are <br />filled directly from the discharge when possible; otherwise, they are filled <br />from the sample bucket as previously described. Field parameters are measured <br />with the Horiba water quality meter. <br />4.6.8.6 MONITORING FOR BACKFILL AQUIFERS <br />The backfill spoils in the west Ridge Area will be monitored for the <br />continued development of a spoils aquifer. A spring and seep survey will be <br />performed annually in May (or as soon as practical after snowmelt) covering <br />the base of reclaimed areas along Trout Creek. NPDES Point 003 will serve as <br />9.6-144 <br />November 1, 1989 <br />