Upper San Leandro Reservoir ,
California
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Upper San Leandro Reservoir Statistics
- A 21.7 mile long, year-round, natural stream that was damed in 1926
- Located in Alameda County and Contra Costa County, California
- Storage Capacity: 41,000 acre-feet
- Storage (typical): 29,500 acre-feet
- Surface Area (typical): 620 acres
- Dentention Time: 1.0 - 4.1 years
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Objective
Located near Oakland, California, the objective of the oxygen diffuser is to control aglae-related taste and odor problems from Anabaena (blue-green) producing geosmin.
Facilities
- 9 tons/day oxygen capacity
- 4,800 feet of diffuser in two lines
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In The Reservoir
*As compared to 2 previous years
(Horne et. al, 2003)
| At The Water Treatment Plant
- Ozone dose decreased by 45%
- Hydrogen peroxide advance oxidation treatment was eliminated
- Chlorine use decreased by 18%
- Trihalomethane (THM) levels in the treated water were reduced by 50%
- TOC remained the same (as expected for the short term)
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| Courtesy of East Bay Municipal Utility District |
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| Courtsey of East Bay Municipal Utility District |
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| Courtesy of East Bay Municipal Utility District |
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Cost Savings at the Water Treatment Plant
Ozone doses decrease:
$11/million gallons cost savings
Hydrogen peroxide elimination:
$12/million gallons cost savings
Chlorine use decrease:
$3/million gallons cost savings
Chemical cost savings are more than twice the cost of oxygen used ($340/day)
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| The work site on top of the dam at Upper San Leandro Reservoir |
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| The supply line protected in PVC pipe |
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| Supply line connection |
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| Water pump for launch |
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| Deployment day |
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| Checking for leaks |
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| Line diffuser |
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| Aligning the diffuser line |
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| Sinking line diffuser |
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| Bubble pattern |
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| Close up of bubbles |
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| The LOx facility below the dam |
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| Control station |
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| Surface bubbles at sunset |
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Publications and References
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Mark H. Mobley, Rodney Jung, H. Hubert Lai
Presented at NALMS 2003
Foxwood Resort
November 5, 2003
Mashantucket, Connecticut
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Former President, CALMS
Published in C.A.L.M.S. (California Lake Management Society)
CALM-WATERS Spring/Summer Newsletter
June, 2014
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