OAR 340-050-0035
Monitoring Recordkeeping and Reporting


The permittee shall provide the Department with biosolids analyses and maintain a log indicating the quantity, quality, and location of biosolids applied to Department approved sites. The site application log shall become a condition of the site authorization letter and must be available for Department review during the life of the application site. Site logs shall be maintained as part of the permittee’s permanent records.


Intentionally left blank —Ed.


Biosolids analyses shall be performed on a representative sample and shall include but not be limited to, all pollutants listed in 40 CFR §503.13(b)(3) Table 1 and the following:


Total Kjeldahl Nitrogen (TKN) —% dry weight;


Nitrate Nitrogen (NO3-N) —% dry weight;


Ammonium Nitrogen (NH4-N) — % dry weight;


Total Phosphorous (P) — % dry weight;


Potassium (K) — % dry weight;


pH — standard units;


Total Solids — % dry weight;


Volatile Solids — % dry weight.


All tests shall be performed using sampling and analytical methods established under 40 CFR § 503.8; the Environmental Protection Agency’s (EPA) POTW Sludge Sampling and Analysis Guidance Document (1989); EPA’s Control of Pathogens and Vector Attraction in Sewage Sludge (EPA/625/R-92013) guidance (2003), and EPA’s POTW Sludge Sampling Procedures and Protocols for the National Sewage Sludge Survey (1989) document.


Sampling locations and frequency shall be representative of the quality and quantity of biosolids generated, but in no case, unless otherwise authorized in writing by the Department, less frequent than required under 40 CFR § 503.16, Table 1.


Recordkeeping requirements shall conform to 40 CFR §503.17.


Domestic Wastewater Treatment Facilities that produce biosolids with one or more trace pollutants whose annual average pollutant concentration exceeds 40 CFR § 503.13(b)(3) limits (based on a 95 percent confidence interval), shall track cumulative pollutant loading pursuant to 40 CFR § 503.13(b)(2), Table 2 and maintain records adequate to demonstrate that pollutant additions do not exceed Table 2 limits.


Unless otherwise required by the Department, the quality and quantity of biosolids and land application actions shall be reported to the Department at least once annually. The Department may require more frequent reporting on biosolids production, treatment, characteristics, and land application activities. Monthly reporting is not required where exceptional quality biosolids are land applied.


Annually, by February 19, each domestic NPDES, WPCF, and Solid Waste permitted source that has generated and land applied bulk biosolids or domestic septage, or prepared biosolids or biosolids derived products for distribution and marketing during the prior year, shall provide the Department with a comprehensive report that describes solids handling activities for the previous year. At a minimum, the report shall include, but is not limited to:


Data, on each site that received solids, which is adequate to characterize solids quality and to demonstrate that solids were applied within agronomic loading rates and other required site management practices.


Sources generating and applying biosolids that are required to track cumulative pollutant additions pursuant to 40 CFR §503.13(b)(2), Table 2, shall also be required to submit information on annual and cumulative pollutant additions;


Information sufficient to demonstrate that solids met pathogen reduction requirements required under 40 CFR § 503.32 and vector attraction reduction standards required under 40 CFR §503.33;


Information describing any substantive modifications to solids handling or land application site management practices;


A detailed description of any violation of 40 CFR § 503 or OAR 340, division 50 and remedial actions taken to prevent the recurrence of similar violations in the future.


Annually, as a requirement of license renewal, sewage disposal service businesses shall submit information adequate to characterize solids handling activities which occurred during the previous licensing period. Information must include data describing the quantities and varieties of septages handled and locations where solids are used and disposed.
[ED. NOTE: To view attachments referenced in rule text, click here to view rule.]

Source: Rule 340-050-0035 — Monitoring Recordkeeping and Reporting, https://secure.­sos.­state.­or.­us/oard/view.­action?ruleNumber=340-050-0035.

Last Updated

Jun. 8, 2021

Rule 340-050-0035’s source at or​.us