9401‑01(A) WG, Monthly Discharge Monitoring Reports (DMR)
Series is used to document the operating parameters of the treatment plant, as required by NPDES, on a monthly basis. Series is also created to document the history of plant operations. Records include the actual report and the raw data that is used to compile reports to EPA and Oregon DEQ. Information includes flows, loadings, load data, tonnage, biosolids (sludge) production, citywide rainfall measurements, control building data, digester data, dredge reports, process lab, gravity thickener lab report, belt press lab report and other related data.
Confidential? No Vital Record? Yes
Record Copy? Yes
RETENTION: Permanent
Authority: OAR 166-200-0120(2)
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9401‑01(B) WG, Monthly Monitoring Report Research & Backup Data
Series is used to document the operating parameters of the treatment plant, as required by NPDES, on a monthly basis. Series is also created to document the history of plant operations. Records include the actual report and the raw data that is used to compile reports to EPA and Oregon DEQ. Information includes flows, loadings, load data, tonnage, biosolids (sludge) production, citywide rainfall measurements, control building data, digester data, dredge reports, process lab, gravity thickener lab report, belt press lab report and other related data.
Confidential? No Vital Record? Yes
Record Copy? Yes
RETENTION: 5 years
Authority: OAR 166-200-0120(2)
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9401‑03 WG, Location Assignment Sheets
Series is created to track the assignment of rotating duties of the Wastewater Group staff. Information includes work assignment, name, date and other related data.
Confidential? No Vital Record? No
Record Copy? Yes
RETENTION: 2 years
Authority: OAR 166-200-0010(34)
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9401‑04 WG, Control Center Log Books
Series is used to document the status of equipment as required by NPDES. Series is created as a communication tool between operators to pass relevant information between shifts. Record is a bound logbook. Information includes problems, current equipment status and other related data.
Confidential? No Vital Record? No
Record Copy? Yes
RETENTION: 5 years
Authority: OAR 166-200-0120(11)
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9401‑05 WG, Strip and Circle Chart Records
Series is used to monitor the operating levels of equipment and various influent/effluent flows at treatment plants. Record is a chart with daily readings. Information includes pump flows, influent/effluent water flows, secondary total flow, influent pH, chlorine residual and other related data.
Confidential? No Vital Record? No
Record Copy? Yes
RETENTION: 5 years
Authority: OAR 166-200-0120(10)
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9401‑06 WG, Methane Gas Sales Records
Series is used to document the volume of methane gas sold to private businesses, as required by the regulatory agency (DEQ). Records include daily volume, billing, contract, and other related data. Information contained includes the amount of gas sold to outside companies.
Confidential? No Vital Record? No
Record Copy? Yes
RETENTION: 5 years
Authority: OAR 166-200-0120(11)
