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9401 Wastewater Group - Operations

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, citywide rainfall measurements, and other related data.

 

Confidential?     No                

Vital Record? Yes

Record Copy?   Yes

               

RETENTION:  Permanent

 

Authority: OAR 166-200-0360(2)(a)

 
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9401‑01(B)    WG, Monthly Monitoring Report Research & Backup Data
 

Series consists of the research and data used to compile the monthly Discharge Monitoring Report (see 9401-01(A).  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 166-200-0360(2)(b) 

 
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9401‑03   WG, Location Assignment Sheets
 

Series is created to track the assignment of rotating duties of the Wastewater Operations staff.  Information includes work assignment, name, date and other related data.

 

Confidential?  No                  

Vital Record? No

Record Copy?  Yes                                         

 

RETENTION:  2 years

 

Authority: OAR 166-200-0400(2) 

 
 
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9401‑04     WG, Operations Logs                                    

 

Series is used to document the status of equipment. Series is created as a communication tool between operators to pass relevant information between shifts.  Information includes problems, current equipment status and other related data.

 

Confidential?  No                  

Vital Record?  No Record Copy?  Yes                            

 

RETENTION:  5 years

 

Authority: OAR 166-200-0360(7)

 
 
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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 Tryon Creek Wastewater Treatment Plant (TCWTP). 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 166-200-0360(4)

 
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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. Records include monthly 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:  Contract related correspondence retain 6 years after contract expiration.  Other records retain 5 years.

 

Authority: OAR 166-200-0360(7); 166-200-0215(8)


Contact Information
Archives & Records
1800 SW 6th Ave, Suite 550
Portland, OR 97201
phone: 503-865-4100 (new)

 

Table of Contents
8801 Customer Services
8802 Environmental Compliance
8803 Solid Waste & Recycling
8805 Development Assistance
8806 Engineering / Projects
8807 Wastewater Group - Maintenance Engineering
8808 Public Involvement
8809 Material Testing Lab
8810 Mid County Office
8811 Source Control
8812 Spill Protection and Response
8813 Environmental Monitoring / Investigations
8814 Hazardous Site Management
8815 Pollution Control Lab
8816 Surfacewater Management
8817 Modeling
8818 Data Acquistions
8819 Downspout Disconnection
8820 Financial Planning
8821 Administration
8822 Communications
8823 Information Services
8824 MWESB (Minority, Women, Emerging Small Business)
8825 - Watershed Services
9401 Wastewater Group - Operations
9402 Wastewater Group - Maintenance
9403 Wastewater Group - Maintenance Support
9404 Wastewater Group - Biosolids & Residuals Management
9406 Wastewater Group - Safety
9407 Wastewater Group - Facilities Management
9408 Wastewater Group - Regulatory Compliance
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