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1999-04 Milton-Freewater groundwater quality study: as part of the statewide groundwater monitoring program
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2000-10 Septic tank maintenance
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2001 Procedures and criteria for installing a new septic system
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2003 Lower Umatilla Basin groundwater management area synoptic sampling event report
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2003-12-29 Northern Malheur County Groundwater Management Area trend analysis report
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2006-04-27 Assessment methodology for Oregon's 2004/2006 integrated report on water quality status, (pursuant to Clean Water Act sections 303(d) and 305(b)), (Appendix B pursuant to OAR 340-041-0046).
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2007 Sand filter and pressure distribution operation and maintenance schedule
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2007 Septic system alternative treatment technologies
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2007 Septic systems and stream crossings
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2007-03-06 Willow Creek Subbasin: water quality objectives for temperature, pH and bacteria
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2007-05-08 Northern Malheur County Groundwater Management Area trend analysis report
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2007-05-23 Bear Creek Watershed TMDLs
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2007-09 water quality budget implementation status
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2008-04 Aquifer storage & recovery and artificial groundwater recharge
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2009 Oregon confined animal feeding operation national pollutant discharge elimination system general permit number 01-2009
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2009-08-19 Is it safe to swim in the Willamette River in Portland?
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2009-11 water quality budget proposals
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2010 Methodology for Oregon's ... water quality report and list of water quality limited waters
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2010-07-09 Northern Malheur County Groundwater Management Area trend analysis report
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2010-08-05 Applying for the 1200-C construction stormwater permit
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2010-10 Oregon's clean water state revolving fund
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2011 Septic systems & stream crossings
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2011-05-04 Drinking water source areas for Oregon public water systems: surface water
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2011-07-01 Applying for the 1200-C construction stormwater permit
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