OHA Drinking Water Services
OR41
PWS ID: 90872 ---- NORTHWEST ALUMINUM COMPANY ---- INACTIVE
GW/GWUDI Source Detail

Non-purchased Groundwater/GWUDI Sources:
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SRC-AA:  WELL #1
GW, Active, Permanent ---- Operating Period: Jan 1 - Dec 31
Disinfection:  RESID. MAINT. HYPOCHLORINATION
Sensitivity Analysis Data
Aquifer sensitivity: Moderate   Surface water within 500 feet: No
Construction adequate?: Yes   Surface water type: Unknown
E. coli sources within 2-year time-of-travel: No   Data last updated: 12/20/2019
Monthly Assessment Monitoring Data
Monthly Assessment Monitoring Required? No

Monthly Schedule (Closed): 1 sample(s) per month to be taken beginning 01/26/2011 - 02/09/2011
 JanFebMarAprMayJunJulAugSepOctNovDecTotal
# Samples
TC+
E. coli+		1
0
0		1
0
0		0
-
-		0
-
-		0
-
-		0
-
-		0
-
-		0
-
-		0
-
-		0
-
-		0
-
-		0
-
-		2
0
0
Outcome/Determination:  Low Risk
No historic GWUDI data were found.
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SRC-AB:  WELL #3
GW, Inactive, Emergency ---- Operating Period Unknown
Disinfection:  RESID. MAINT. HYPOCHLORINATION
Sensitivity Analysis Data
Aquifer sensitivity: Moderate   Surface water within 500 feet: No
Construction adequate?: Yes   Surface water type: Unknown
E. coli sources within 2-year time-of-travel: Yes   Data last updated: 12/20/2019
Monthly Assessment Monitoring Data
Monthly Assessment Monitoring Required? No

Monthly Schedule (Closed): 1 sample(s) per month to be taken beginning 01/26/2011 - 02/09/2011
 JanFebMarAprMayJunJulAugSepOctNovDecTotal
# Samples
TC+
E. coli+		0
-
-		0
-
-		0
-
-		0
-
-		0
-
-		0
-
-		0
-
-		0
-
-		0
-
-		0
-
-		0
-
-		0
-
-		0
-
-
Outcome/Determination:  N/A
No historic GWUDI data were found.
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SRC-CA:  WELL #4
GW, Inactive (Abandoned), Other ---- Operating Period: Jan 1 - Dec 31
Disinfection: None
Sensitivity Analysis Data
Aquifer sensitivity: Moderate   Surface water within 500 feet: No
Construction adequate?: Yes   Surface water type: Unknown
E. coli sources within 2-year time-of-travel: Yes   Data last updated: 12/20/2019
Monthly Assessment Monitoring Data
Monthly Assessment Monitoring Required? No

Monthly Schedule (Closed): 1 sample(s) per month to be taken beginning 01/26/2011 - 02/09/2011
 JanFebMarAprMayJunJulAugSepOctNovDecTotal
# Samples
TC+
E. coli+		0
-
-		0
-
-		0
-
-		0
-
-		0
-
-		0
-
-		0
-
-		0
-
-		0
-
-		0
-
-		0
-
-		0
-
-		0
-
-
Outcome/Determination:  N/A
No historic GWUDI data were found.
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