GENERAL42322 - Laserfiche WebLink

Home Browse Search

n ~J n L~I 3. Label sample bottles as indicated on Figure 1. 4. Lower bailer to "sampling depth" (see Data Collection Form). 5. Pull bailer up and down approximately 2 feet to allow the water from the sampling depth to flow through the bailer. Do not do this in shallow alluvial wells where there is less than 5 feet of water in the well. 6. Remove the bailer from the well and use fluid to rinse field parameter measurement equipment and bottles. Pour remaining water to waste. 7. Lower bailer to sampling depth and repeat step 5 until one to three casing volumes of water has been removed from the well. 8. Remove bailer and use fluid to take field measurements. 9. Collect additional volumes of water as indicated in the previous steps until the laboratory sample bottles are filled. 10. Sample bottles must be cooled with ice immediately upon collection and delivered to the laboratory as soon as possible. B. 3. SURFACE WATER SAMPLE COLLECTION follows: Surface water samples, as well as samples of other flowing sources, need to be collected so they represent the whole flow of the stream. The optimum method is to integrate the stream samples by depth and width. As this is generally impossible at Empire Energy due to the large size of the rivers being sampled and time and equipment constraints, the sampling must at least obtain readily reproducible results. In order to meet this goal, the samples must be taken at the same location every time and they must be taken far enough from the bank to ensure that area of the stream sampled is flowing near the average stream velocity. This procedure for collecting surface water and other flowing water source samples is as 1. Obtain the sample bottles from the laboratory. 2. Label the sample bottles when you arrive at the site. 3. Rinse the sampling bottle in stream water. 4. Collect a sample of water by totally emersing the bottle in the stream (if possible) with the mouth pointed slightly upstream. Do not disturb the bottom of the stream nor induce any turbidity in the collected sample. 5. Where flow into the bottle would be very turbulent, such as discharge from a pipe or flume, a piece of tubing should be held in the flow and the discharge from the tubing used to fill the sample bottles. This will decrease aeration of the sample and will alleviate the problem of accidently overfilling preserved sample bottles in high flows. 6. Collect additional volumes of water as'indicated in the previous steps until the sample bottles are filled. 7. Sample bottles must be cooled with ice immediately upon collection and delivered to the laboratory as soon as possible. • B-2