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| Title | Quality Assurance Project Plan: Waitsburg Wastewater Treatment Plant Groundwater Study: Evaluation of Nutrient Loading to the Touchet River | |||
| Month-Year Published | November 2009 | |||
| Online Availability |
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| Short Description |
This is the study plan for the Waitsburg Wastewater Treatment Plant Groundwater Study: Evaluation of Nutrient Loading to the Touchet River. (Also see abstract below) | |||
| Publication Number | 09-03-119 | |||
| Author(s) | Pitz, C. | |||
| Print Availability | ||||
| Number of pages | 35 pp. | |||
| Keywords | 303(d), clean water act, Ecology, evaluation, groundwater, internet, loading, nutrient, nutrient loading, quality, quality assurance, quality assurance project plan, report , river, Total Maximum Daily Load, treatment, waste, wastewater, wastewater treatment plant, water, water quality, water quality improvement | |||
| Subject Waterbodies |
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| Abstract | Long Description |
In 2007 a Total Maximum Daily Load Study (TMDL) Water Quality Improvement Report was published to address federal Clean Water Act 303(d) listings for pH and dissolved oxygen in the Walla Walla River watershed. The report recommended additional field investigation in several key areas of concern within the watershed to help identify the specific source(s) of elevated nutrients in surface water. This included a recommendation for a nutrient source and loading study at the Waitsburg, Washington municipal wastewater treatment plant (WWTP). Treated effluent from the Waitsburg WWTP is released to an unlined infiltration wetland immediately adjacent to the Touchet River, a tributary to the Walla Walla River. The wetland is considered in hydraulic continuity with the river. This suggests the possibility that an excess nutrient load could be reaching the river from the infiltration system via subsurface seepage of groundwater into the river. This groundwater study is proposed to determine if this is the case. Each study conducted by the Washington State Department of Ecology must have an approved Quality Assurance Project Plan. The plan describes the objectives of the study and the procedures to be followed to achieve those objectives. After completion of the study, a final report describing the study results will be posted to the Internet. |
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This page last updated November 4, 2009
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