leach creek water quality analysis: levels of heavy metals found in the leach creek holding basin

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Leach Creek Water Quality Analysis: Levels of Heavy Metals Found in the Leach Creek Holding Basin Emily Britt, Latisha Cain, Nicholas Davis, Regina Doria, Hannah Holly, Nathan Huff, Spencer Jenks, Ayanna Jordan, Hannah Pena, Krystie Roth, Evan Schueler, Madeline Stauffacher, Lenzi Stowers, Kyle Tank, Stone Ward, Yimin Zeng, and Nicholas Stephens Curtis Senior High School, 8425 40 th Street West, University Place, 98466

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Page 1: Leach Creek Water Quality Analysis: Levels of Heavy Metals Found in the Leach Creek Holding Basin

Leach Creek Water Quality Analysis: Levels of Heavy Metals

Found in the Leach Creek Holding Basin

 Emily Britt, Latisha Cain, Nicholas Davis, Regina Doria, Hannah Holly, Nathan Huff, Spencer Jenks, Ayanna Jordan, Hannah Pena, Krystie Roth, Evan Schueler, Madeline Stauffacher, Lenzi Stowers, Kyle 

Tank, Stone Ward, Yimin Zeng, and Nicholas Stephens 

Curtis Senior High School, 8425 40th Street West, University Place, 98466

Page 2: Leach Creek Water Quality Analysis: Levels of Heavy Metals Found in the Leach Creek Holding Basin

Chum Salmon Population is Low

Page 3: Leach Creek Water Quality Analysis: Levels of Heavy Metals Found in the Leach Creek Holding Basin

Earlier Reports of Heavy Metals in Chambers, Leach Creeks

• Some samples contained mercury, copper levels that exceeded EPA limits

• Samples indicated that holding basin was at or near source(s)

Page 4: Leach Creek Water Quality Analysis: Levels of Heavy Metals Found in the Leach Creek Holding Basin

Purpose of our Project

• Learn about water quality, salmon populations

• Gain experiences in field studies, scientific method

• Locate source(s) of pollutants in order to focus on solutions

Page 5: Leach Creek Water Quality Analysis: Levels of Heavy Metals Found in the Leach Creek Holding Basin

Water Sample Locations

North Site

East Site

Outlet Site

Groundwater

Landfill

Page 6: Leach Creek Water Quality Analysis: Levels of Heavy Metals Found in the Leach Creek Holding Basin

Water Sample LocationsNorth Site

East Site Groundwater Site

Holding Basin Outlet

Page 7: Leach Creek Water Quality Analysis: Levels of Heavy Metals Found in the Leach Creek Holding Basin

Using the Drive Point Piezometer

Page 8: Leach Creek Water Quality Analysis: Levels of Heavy Metals Found in the Leach Creek Holding Basin

Environmental Scientists at Work!

Page 9: Leach Creek Water Quality Analysis: Levels of Heavy Metals Found in the Leach Creek Holding Basin

Tour of Spectra Laboratories

Page 10: Leach Creek Water Quality Analysis: Levels of Heavy Metals Found in the Leach Creek Holding Basin

Metal Data

Analyte 11/19 Result 12/3 Result Units MethodArsenic 1.6 6.0 ug/L EPA 200.8Barium 4.8 12.2 ug/L EPA 200.8

Cadmium <0.5 <0.5 ug/L EPA 200.8Chromium <0.5 <0.5 ug/L EPA 200.8

Copper 1.1 <0.5 ug/L EPA 200.8Lead <0.5 <0.5 ug/L EPA 200.8

Nickel 1.0 2.0 ug/L EPA 200.8Selenium <0.5 <0.5 ug/L EPA 200.8

Silver <0.5 <0.5 ug/L EPA 200.8Zinc 5.7 5.0 ug/L EPA 200.8

Mercury <0.2 <0.2 ug/L EPA 245.1

Analyte 11/19 Result 12/3 Result Units MethodArsenic 1.5 6.2 ug/L EPA 200.8Barium 10.6 29.9 ug/L EPA 200.8

Cadmium <0.5 <0.5 ug/L EPA 200.8Chromium 0.7 0.8 ug/L EPA 200.8

Copper 3.0 6.9 ug/L EPA 200.8Lead 2.0 24.8 ug/L EPA 200.8

Nickel 1.8 2.0 ug/L EPA 200.8

Selenium <0.5 <0.5 ug/L EPA 200.8Silver <0.5 <0.5 ug/L EPA 200.8Zinc 15.9 83.5 ug/L EPA 200.8

Mercury <0.2 <0.2 ug/L EPA 245.1

East Sample Site

Holding Basin Outlet

Page 11: Leach Creek Water Quality Analysis: Levels of Heavy Metals Found in the Leach Creek Holding Basin

Metal DataAnalyte 11/19 Result 12/3 Result Units Method

Arsenic 11.0 190 ug/L EPA 200.8Barium 1590 1510 ug/L EPA 200.8

Cadmium 5.8 5.2 ug/L EPA 200.8Chromium 5.0 272 ug/L EPA 200.8

Copper 14.2 485 ug/L EPA 200.8Lead 44.2 867 ug/L EPA 200.8

Nickel 571 2220 ug/L EPA 200.8Selenium <0.5 15 ug/L EPA 200.8

Silver <0.5 14.4 ug/L EPA 200.8Zinc 356 1630 ug/L EPA 200.8

Mercury 10.0 0.4 ug/L EPA 245.1

Analyte 11/19 Result 12/3 Result Units MethodArsenic 4.6 3110 ug/L EPA 200.8Barium 5920 6230 ug/L EPA 200.8

Cadmium 9.8 73.6 ug/L EPA 200.8Chromium 10.3 457 ug/L EPA 200.8

Copper 18.6 1220 ug/L EPA 200.8Lead 1.8 928 ug/L EPA 200.8

Nickel 1090 14700 ug/L EPA 200.8

Selenium <0.5 48.4 ug/L EPA 200.8Silver <0.5 22.8 ug/L EPA 200.8Zinc 127 1300 ug/L EPA 200.8

Mercury 0.7 0.5 ug/L EPA 245.1

North Sample Site

Groundwater Sample Site (nearest to Landfill)

Page 12: Leach Creek Water Quality Analysis: Levels of Heavy Metals Found in the Leach Creek Holding Basin

Conclusions

• Groundwater that enters holding basin from north (Fircrest area) is potential source of mercury, copper.

• Water entering from eastern side of holding basin (nearest to landfill) contains low levels of mercury. 

• Large discrepancy between sample collection dates; further testing needed

Page 13: Leach Creek Water Quality Analysis: Levels of Heavy Metals Found in the Leach Creek Holding Basin

Future Work

• Return to north, groundwater sites; obtain water using piezometer and test for metals in an attempt to get repeatable results.

• Test well water of residents to north of holding basin for mercury, other metals.

• Investigate other potential causes of chum decline (storm water discharge, water temperature, etc…)

• Incubate chum eggs, release into creek

Page 14: Leach Creek Water Quality Analysis: Levels of Heavy Metals Found in the Leach Creek Holding Basin

Acknowledgements

• Chambers-Clover Creek Watershed Council• Calvin Taylor and Karen Bartlett (City of 

Tacoma)• Steve Hibbs and Marie Holt (Spectra Labs) • Al Schmauder and Don Russell