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2.05.6(3) One of five methods is used to determine the flow at surface water monitoring stations. The following methods aze utilized; I) V-Notch weir; 2) corrugated metal pipe culvert utilizing pipe size, and velocity of flow; 3) regular channel shape utilizing cross-sectional area and velocity of Bow; 4) timing flow into a bucket of known volume and; S) estimate of flow based upon experience. The following table shows the flow monitoring method used at the monitoring stations based upon the above monitoring method numbers I - 5. Active Monitoring Stations B-1 Upper Bramiers Draw B-2 Lower Bramiers Draw N-1 Upper Naturita Creek N-lA Upper Naturita Creek N-2 Lower Naturita Creek H-2 Lower Broad Creek S-1 Section 33 Creek R-1 Reed Chatfield Ditch SP-1 - SP-6 -All Springs Inactive Monitoring Stations H-1 Upper Broad Creek C-1 Upper Center Creek C-2 Lower Center Creek L-1 Upper Long Draw L-2 Lower Long Draw W-1 Upper Wickson Draw W-2 Lower Wickson Draw Flow Monitoring Method 3 -Regular Channel 2 -Culvert 3 -Regular Channel 3 -Regular Channel 3 -Regular Channel 3 -Regular Channel 3 -Regular Channel 5 -Flow Estimate 4 -Bucket Flow Monitoring Method 3 -Regular Channel 2 -Culvert 1 -Weir 1 -Weir 1-Wev 3 -Regular Channel 1 -Weir Surface and underground water samples are collected in bottles supplied by the testing laboratory. Each water sample consists of three bottles, one unpreserved titer bottle and two 250 milliliter bottles, one preserved with nitric acid and one preserved with sulfuric acid. The bottles are shipped firom the field to the testing laboratory in an ice filled cooler. Water samples from the bedrock wells and the alluvial wells are taken a8er the wells have been purged. At least three well volumes are evacuated in order to purge the wells in accordance with the following table: Well diameter in inches 3/4 1 1'/z 2 4 6 Gallons/lineal foot of water in well 0.023 0.04 0.09 0.16 0.65 1.47 2.05-35a April 1993