Skip to Main Content View Text-Only

Archives & Records Management

Office of the City Auditor

phone: 503-865-4100

email: parc@portlandoregon.gov

1800 SW 6th Ave, Suite 550, Portland, OR 97201

More Contact Info

9404 Wastewater Group - Biosolids & Residuals Management

9404‑01   WG, Biosolids Land Application Records

Series is used to document the land application of biosolids to Oregon DEQ approved sites.  Records include maps of application locations, contracts, lease agreements and invoices.

Retention: 6 years after agreement expiration
Authority: OAR 166-200-0265(3)(c)
Confidential? No                 
Vital Record? No
Record Copy? Yes               

 

9404‑02   WG, Biosolids Application Site Logs

Series tracks biosolids applied at approved land application sites. Subjects include agronomic loading calculations related to maximum application of nitrogen in pounds per acre per year, and ultimate site life loading calculations tracking the amount of heavy metals applied

Retention: Permanent
Authority: OAR 166-200-0370(6)
Confidential? No                  
Vital Record? No
Record Copy? Yes                

 

9404‑03   WG, Biosolids Hauling Records

Series is used to document contract haulers of biosolids.  Series is created to document each load that leaves treatment plant for land application.  Records include scale tickets, contractor invoices, fuel invoices, contracts, spill response plan and other related data.

Retention: 5 years
Authority: OAR 166-200-0370(2)
Confidential? No                   
Vital Record? No
Record Copy? Yes                 

  

9404‑06   WG, Landfill Records/ Grit & Screenings and Sanitary Collections System Residuals Disposal

Series is used to track the landfill disposal of grit & screenings that have been removed from the preliminary treatment process and sanitary residuals removed from the collections system. Records include invoices, scale sheets, permits and other related data.

Retention: 5 years
Authority: OAR 166-200-0360(7)(b)
Confidential? No                  
Vital Record? No
Record Copy? Yes                                         

 

9404‑07   WG, Biosolids Quality Control Records 

Series is used to track the testing of land applied biosolids. Series is created to ensure that minimum federal and state requirements are met. Records include treatment process data, sampling data, analysis, management plans, annual reports, plan approval and other related data.

Retention: Permanent
Authority: OAR 166-200-0320(11)
Confidential? No                  
Vital Record? No
Record Copy? Yes