Las Vegas Wash Tributaries Water Quality Report, 2003-2007

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Tributary Water Quality Monitoring Program, 2003-2007SOUTHERN NEVADA WATER AUTHORITYResource Monitoring Water Quality TeamPrepared by:Roslyn RyanSouthern Nevada Water AuthorityEnvironmental Monitoring and Management Division100 City Parkway, Suite 700Las Vegas, Nevada 89106September 2008
Tributary Water Quality Monitoring Program, 2003-2007Table of ContentsPage No.Table of Contents............................................................................................................................ iiList of Tables ................................................................................................................................. iiiList of Figures................................................................................................................................ iiiList of Appendices ......................................................................................................................... iv1.0 INTRODUCTION....................................................................................................................12.0 METHODS ...............................................................................................................................12.1 Sampling Sites ..............................................................................................................12.2 Parameters....................................................................................................................42.3 Sample Collection and Analyses.................................................................................43.0 RESULTS AND DISCUSSION ..............................................................................................53.1 Water Quality in Tributaries and Seeps in the Las Vegas Wash............................53.1.1 Field Measurements............................................................................................53.1.2 Major Ion Chemistry..........................................................................................93.1.3 Nutrients ............................................................................................................133.1.4 Metals.................................................................................................................173.1.5 Selenium.............................................................................................................193.1.6 Bacteria ..............................................................................................................203.1.7 Perchlorate.........................................................................................................223.1.8 Organic Compounds.........................................................................................253.1.9 Flow Rates..........................................................................................................273.2.0 Mass Loading ....................................................................................................304.0 CONCLUSIONS ....................................................................................................................325.0 REFERENCES.......................................................................................................................33Tributary Water Quality Monitoring Program, 2003-2007ii
Page 4: List of TablesPage No.Table 1. Samp
Page 7 and 8: Site NameLVC_2LW12.1FW_0SC_1DC_1MC_
Page 9 and 10: 2.2 ParametersField measurements, i
Page 11 and 12: 2004Site Temp. 0 C pH EC uS/cm DO m
Page 13 and 14: 2c: Average Field Parameters, 20058
Page 15 and 16: SiteYearCalcium (mg/l)Magnesium(mg/
Page 17 and 18: 600050004000TDS in mg/L300020001000
Page 19 and 20: TOC concentrations were less than 6
Page 21 and 22: 0.30OPTP0.25Average Concentration m
Page 23 and 24: 900.0800.0Aluminum (ug/l)Manganese
Page 25 and 26: 25.020.0Selenium (ug/l)15.010.05.00
Page 27 and 28: Average of the Average Bacteria Con
Page 29 and 30: Annual Average Perchlorate Concentr
Page 31 and 32: SampleSitePeriodSampleGlyoxalM-Glyo
Page 33 and 34: methods for measurement and computa
Page 35 and 36: 80007000All tributaries contribute
Page 37 and 38: 4.0 CONCLUSIONSThe Tributary Water
Page 39 and 40: Appendix AIndividual Parameters to
Page 41 and 42: 2,4-Dimethylphenol 5.00 Atrazine (A
Page 43 and 44: Ib. Heavy Metals GroupAluminumAntim
Page 45 and 46: Appendix IIa. Quarterly Field Measu
Page 47 and 48: Appendix IIa. Quarterly Field Measu
Page 49 and 50: Appendix IIb. Quarterly Major Ion C
Page 51 and 52: Appendix IIb. Quarterly Major Ion C
Page 53 and 54:
Appendix IIc. Nutrient Concentratio
Page 55 and 56:
Appendix IId. Quarterly Heavy Metal
Page 57 and 58:
Site LocationAppendix IId. Quarterl
Page 59 and 60:
Appendix IIe. Organic Compound Conc
Page 61 and 62:
Page 63 and 64:
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Page 67 and 68:
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Las Vegas Wash Tributaries Water Quality Report, 2003-2007

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