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Virginia Administrative Code
Title 9. Environment
Agency 25. State Water Control Board
Chapter 32. Virginia Pollution Abatement (VPA) Permit Regulation
12/3/2024

9VAC25-32-400. Additional monitoring.

A. The department may require that additional site specific monitoring be performed by the holder of the permit for any biosolids land application practice regardless of frequency of application or size of the application area. Such requirements may occur in situations in which groundwater contamination, surface runoff, soil toxicity, health hazards or nuisance conditions are identified as an existing problem or potential problem as a result of biosolids use operations. Additional monitoring may include, but is not limited to, groundwater, surface water, crop, and soil monitoring.

B. The department may require the owner or operator of any facility or operation to install, use, and maintain monitoring equipment for internal testing of biosolids quality, to identify and determine the causes of operational problems, and to determine the necessary corrective actions to correct such problems. If this testing is required, test results shall be recorded, compiled, and reported to the department.

C. Additional operational control information may be required on an individual basis by the department.

D. The department may require biosolids to be tested for certain toxic organic compounds prior to agricultural use. If performed and validated, these test results shall be utilized to evaluate the maximum allowable annual loading rate for the tested biosolids. If analytical test results verify that biosolids contains levels of organic chemicals exceeding concentration limits incorporated in federal regulations or standards, appropriate restrictions shall be imposed for agricultural use of those biosolids.

E. Additional parameters may be required for screening purposes such as aluminum (mg/kg), water soluble boron (mg/kg), calcium (mg/kg), manganese (mg/kg), sulfates (mg/kg), and those pollutants for which removal credits are granted.

F. Microbiological testing may be necessary to document the sludge treatment classification (9VAC25-32-675). Microbiological standards shall be verified by the log mean of the analytical results from testing of seven or more samples of the sludge source. Sampling events shall be separated by an appropriate period of time so as to be representative of the random and cyclic variations in sewage characteristics.

Statutory Authority

§ 62.1-44.15 of the Code of Virginia.

Historical Notes

Derived from Virginia Register Volume 24, Issue 6, eff. January 1, 2008; amended, Virginia Register Volume 29, Issue 24, eff. September 1, 2013; Volume 39, Issue 5, eff. November 23, 2022.

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