OHA Drinking Water Services
OR41
PWS ID: 00665 ---- TUALATIN VALLEY WATER DISTRICT

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 notesYearly01/01/2024 - 12/31/2024 122 50 done 06/23/2024
 Seasonal sampling period:  06/01  thru  09/30
DIST-A  DISTRIBUTION SYSTEM STAGE 2 DBP notesQuarterly 07/01/2024 - 09/30/2024 30 8 incomplete06/04/2024
EP-C  EP FOR WELL 1 - GRABHORN ASR ARSENIC notes9 Years01/01/2017 - 12/31/2025 487 1 done 09/26/2023
EP-C  EP FOR WELL 1 - GRABHORN ASR IOC notes9 Years01/01/2017 - 12/31/2025 487 1 done 11/04/2020
EP-C  EP FOR WELL 1 - GRABHORN ASR NITRATE  Yearly 01/01/2024 - 12/31/2024 122 1 incomplete09/26/2023
EP-C  EP FOR WELL 1 - GRABHORN ASR NITRITE notes9 Years01/01/2017 - 12/31/2025 487 1 done 09/26/2023
EP-C  EP FOR WELL 1 - GRABHORN ASR RAD - GROSS ALPHA notes9 Years01/01/2020 - 12/31/2028 1,583 1 done 11/04/2020
EP-C  EP FOR WELL 1 - GRABHORN ASR RAD - RADIUM 226/228notes9 Years 01/01/2023 - 12/31/2031 2,678 1 incomplete11/04/2020
EP-C  EP FOR WELL 1 - GRABHORN ASR RAD - URANIUM notes9 Years 01/01/2023 - 12/31/2031 2,678 1 incomplete11/04/2020
EP-C  EP FOR WELL 1 - GRABHORN ASR SOC notes3 Years01/01/2023 - 12/31/2025 487 2 done 10/16/2023
EP-C  EP FOR WELL 1 - GRABHORN ASR VOLATILE ORGANICS  3 Years 01/01/2023 - 12/31/2025 487 1 incomplete11/04/2020

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  Quarterly01/01/200212/31/20048Schedule Reflects 4 RT Samples Per QT Per WTP
DIST-A  DISTRIBUTION SYSTEMHAA5 & TTHM  Quarterly01/01/200503/31/201223 per Quarter When ASR in Use.
DIST-A  DISTRIBUTION SYSTEMLEAD & COPPER  6 Months01/01/200212/31/2016100Schedule Reflects PWB Joint Monitoring Plan
DIST-A  DISTRIBUTION SYSTEMLEAD & COPPER  6 Months01/01/201712/31/2017100
DIST-A  DISTRIBUTION SYSTEMLEAD & COPPER  6 Months07/01/202212/31/2023100
DIST-A  DISTRIBUTION SYSTEMLEAD & COPPER  Yearly01/01/201812/31/202150Sample between June 1st and September 30th
DIST-A  DISTRIBUTION SYSTEMSTAGE 2 DBP  Quarterly04/01/201203/31/20138Sample in March, June, Sept & Dec
DIST-A  DISTRIBUTION SYSTEMSTAGE 2 DBP  Quarterly04/01/201303/31/20144Sample in March, June, Sept & Dec
EP-C  EP FOR WELL 1 - GRABHORN ASRARSENIC  3 Years01/01/200812/31/20161
EP-C  EP FOR WELL 1 - GRABHORN ASRIOC  3 Years01/01/200812/31/20161
EP-C  EP FOR WELL 1 - GRABHORN ASRNITRITE  3 Years01/01/200812/31/20161
EP-C  EP FOR WELL 1 - GRABHORN ASRRAD - GROSS ALPHA  Quarterly07/01/200912/31/20101
EP-C  EP FOR WELL 1 - GRABHORN ASRRAD - RADIUM 226/228  Quarterly07/01/200912/31/20111
EP-C  EP FOR WELL 1 - GRABHORN ASRRAD - URANIUM  Quarterly07/01/200912/31/20111
EP-C  EP FOR WELL 1 - GRABHORN ASRSOC  Yearly01/01/200912/31/20121
EP-C  EP FOR WELL 1 - GRABHORN ASRVOLATILE ORGANICS  Yearly01/01/200912/31/20121

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More information for this water system: SDWIS ID 4065
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