OHA Drinking Water Services
OR41
PWS ID: 06138 ---- DIAMOND RIDGE SUBDIVISION

See also: Coliform Schedules

Chemical Sampling Schedule Status
Facility
ID		 Analyte or Group   Sampling
Interval		 Monitoring Period Days
Until
End		 Samples
Required		 Samples
Received		 Last
Sample
Date
Start End
DIST-A  DISTRIBUTION SYSTEM LEAD & COPPER notes3 Years01/01/2025 - 12/31/2025   5 09/12/2022
 Seasonal sampling period:  06/01  thru  09/30
DIST-A  DISTRIBUTION SYSTEM STAGE 2 DBP notes3 Years01/01/2026 - 12/31/2026   1  03/06/2023
 Seasonal sampling period:  03/01  thru  03/31
EP-A  EP FOR WELLS ARSENIC  9 Years01/01/2017 - 12/31/2025 405 1 done 05/06/2024
EP-A  EP FOR WELLS IOC  9 Years 01/01/2017 - 12/31/2025 405 1 incomplete10/12/2015
EP-A  EP FOR WELLS NITRATE  Yearly01/01/2024 - 12/31/2024 40 1 done 02/05/2024
EP-A  EP FOR WELLS NITRITE  9 Years 01/01/2017 - 12/31/2025 405 1 incomplete10/12/2015
EP-A  EP FOR WELLS RAD - GROSS ALPHA  9 Years 01/01/2023 - 12/31/2031 2,596 1 incomplete08/08/2022
EP-A  EP FOR WELLS RAD - RADIUM 226/228 9 Years 01/01/2023 - 12/31/2031 2,596 1 incomplete11/28/2022
EP-A  EP FOR WELLS RAD - URANIUM  9 Years01/01/2017 - 12/31/2025 405 1 done 08/08/2022
EP-A  EP FOR WELLS SOC  3 Years 01/01/2023 - 12/31/2025 405 1 incomplete10/11/2022
EP-A  EP FOR WELLS VOLATILE ORGANICS  3 Years01/01/2023 - 12/31/2025 405 1 done 08/14/2023

8  secs
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Expired Schedules
Facility
ID		 Analyte or Group    Sampling
Interval		 Start End Samples
Required		    Notes
DIST-A  DISTRIBUTION SYSTEMHAA5 & TTHM  Yearly01/01/201012/31/20111Sample between June 1st and September 30th
DIST-A  DISTRIBUTION SYSTEMLEAD & COPPER  6 Months07/01/201002/03/20125Sample Between June 1st and Sept 30th
DIST-A  DISTRIBUTION SYSTEMSTAGE 2 DBP  Yearly01/01/201512/31/20221Collect one dual sample set in March.
DIST-A  DISTRIBUTION SYSTEMSTAGE 2 IDSE  Yearly01/01/201412/31/20142Sample in July
EP-A  EP FOR WELLSARSENIC  3 Years01/01/200802/03/20121
EP-A  EP FOR WELLSARSENIC  3 Years01/01/201412/31/20161
EP-A  EP FOR WELLSIOC  3 Years01/01/200802/03/20121
EP-A  EP FOR WELLSIOC  3 Years01/01/201412/31/20161
EP-A  EP FOR WELLSNITRITE  3 Years01/01/201412/31/20161
EP-A  EP FOR WELLSRAD - GROSS ALPHA  6 Years01/01/201712/31/20221
EP-A  EP FOR WELLSRAD - GROSS ALPHA  9 Years01/01/201406/30/20151
EP-A  EP FOR WELLSRAD - GROSS ALPHA  Quarterly07/01/201006/30/20111
EP-A  EP FOR WELLSRAD - GROSS ALPHA  Quarterly07/01/201503/31/20161
EP-A  EP FOR WELLSRAD - RADIUM 226/228  6 Years01/01/201712/31/20221
EP-A  EP FOR WELLSRAD - RADIUM 226/228  9 Years01/01/201406/30/20151
EP-A  EP FOR WELLSRAD - RADIUM 226/228  Quarterly07/01/201006/30/20111
EP-A  EP FOR WELLSRAD - RADIUM 226/228  Quarterly07/01/201503/31/20161
EP-A  EP FOR WELLSRAD - URANIUM  9 Years01/01/201406/30/20151
EP-A  EP FOR WELLSRAD - URANIUM  Quarterly07/01/201006/30/20111
EP-A  EP FOR WELLSRAD - URANIUM  Quarterly07/01/201512/31/20151
EP-A  EP FOR WELLSSOC  Quarterly07/01/201002/03/20121
EP-A  EP FOR WELLSVOLATILE ORGANICS  Quarterly07/01/201012/31/20111
EP-A  EP FOR WELLSVOLATILE ORGANICS  Yearly01/01/201412/31/20221
EP-A  EP FOR WELLSXYLENES, TOTAL   Quarterly01/01/201212/31/20121

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