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Title

QAPP - City of Dayton Due Diligence Work

 
Publication number Date Published
24-12-001March 2024
VIEW NOW QAPP - City of Dayton Due Diligence Work (Number of pages: 61) (Publication Size: 8289KB)




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Author(s) Office of Columbia River
Description The purpose of this project is to collect groundwater quality data with which to determine background groundwater quality conditions to be used in the design of a new wastewater treatment facility for the City of Dayton. The Total Maximum Daily Loads (TMDL) for the Touchet River established restrict the discharge of treated effluent to the river (Ecology, 2007). Prior to defining the TMDLs, Dayton’s treated wastewater effluent discharged to Touchet River. Due to this, the City is proposing a mechanical treatment facility followed by a constructed wetland system for treated wastewater polishing and disposal. Prior to developing a constructed wetlands wastewater system, the City must conduct due diligence and groundwater quality testing. Identifying the existing groundwater quality in the vicinity of the constructed wetlands determines the design criteria necessary to ensure groundwater is not degraded. This QAPP establishes the procedures for sample collection, testing, quality control, and data management necessary to generate accurate groundwater data.
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Keywords QAPP, due diligence, Dayton