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WSP07312
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Last modified
1/26/2010 2:26:45 PM
Creation date
10/12/2006 2:14:55 AM
Metadata
Fields
Template:
Water Supply Protection
File Number
8270.100
Description
Colorado River Basin Water Quality/Salinity -- Misc Water Quality
Basin
Colorado Mainstem
Water Division
5
Date
1/1/1976
Author
CDH
Title
Report on the Investigation of the Water Quality of the Colorado River - Dotsero - Colorado to Utah Border
Water Supply Pro - Doc Type
Report/Study
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<br />APPENDIX A <br /> <br />w <br />o <br />a <br /><=> <br /> <br />NETHODOLOGY FOR CHE:.fICAL AND PHYSICAL A.."lALYSIS OF WATER SANPLES <br /> <br />Streamside chemical analysis of each sample generally consisted of pH, <br /> <br />dissolved oxygen (D.O.), temperature, conductivity, alkalinity, cr~oride ion <br /> <br />and hardness determinations. If some of these analyses were deleted in the <br /> <br />field, the work was done at a later time in the laboratory. The pH of the <br /> <br />samples was determined with an Analytical Measureu.ents pH mater Model 707B. <br /> <br />Dissolved oxygen concentrations were arrived at by employing the azide <br /> <br />modification of the Winkler titration method. Temperatures, in degrees <br /> <br />Centigrade, were read directly from pocket thermometers held vertically in <br /> <br />the river waters. Alkalinities were meas~ed by titrating with 0.2N H2S04 <br /> <br />using phenolphthalein and ~xed indicator to determine pH endpoints of 8.3 <br /> <br />and 4.4 respectively. The chloride concentration, Cl-, was arrived at by <br /> <br />titration with 0.0141 N silver nitrate using potassium chromate as an indicator. <br /> <br />Hardness concentrations were determined by titrating with 0.01 M EDTA <br /> <br />(ethylenediaminetetraacetic acid). Total hardness and calcium .~rdness were <br /> <br />determined directly using Calmagite and Hydroxynaphtr~l blue indicators. <br /> <br />Magnesi~~, as ppm Mg++, was calculated mathe~tically by subtracting the calci~~ <br /> <br />hardness from the total hardness and multiplying by a correction factor of 0.2432. <br /> <br />Conductivities were measured on a Lab-Line portable conductivity meter and <br /> <br />recorded as microt:t..~s, (umhos), of conductance. <br /> <br />Turbidities .....ere determined using a Bach turbidity meter, Model 2100ri. <br /> <br />The re~inder of the chemical analyses were perfor~ in the ~bile <br /> <br />laboratory. BOD and COD were run according to methodology developed by the <br /> <br />~et laboratory of t:.e Colo=~do Depar~~ent of Health, Denver offices. <br />
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