Virginia Administrative Code
Title 9 - ENVIRONMENT
Agency 25 - STATE WATER CONTROL BOARD
Chapter 31 - VIRGINIA POLLUTANT DISCHARGE ELIMINATION SYSTEM (VPDES) PERMIT REGULATION
Part VI - Standards for the Use of Biosolids or Disposal of Sewage Sludge
Article 3 - Surface Disposal
Section 9VAC25-31-660 - Frequency of monitoring
Current through Register Vol. 41, No. 3, September 23, 2024
A. Sewage sludge (other than domestic septage).
|
TABLE 1 FREQUENCY OF MONITORING--SURFACE DISPOSAL |
|
|
Amount of sewage sludge* (metric tons per 365-day period) |
Frequency |
|
Greater than zero but less than 290 |
once per year |
|
Equal to or greater than 290 but less than 1,500 |
once per quarter (four times per year) |
|
Equal to or greater than 1,500 but less than 15,000 |
once per 60 days (six times per year) |
|
Equal to or greater than 15,000 |
once per month (12 times per year) |
|
*Amount of sewage sludge placed on an active sewage sludge unit (dry weight basis). |
|
B. Domestic septage. If the vector attraction reduction requirements in 9VAC25-31-720 B 12 are met when domestic septage is placed on an active sewage sludge unit, each container of domestic septage shall be monitored for compliance with those requirements.
C. Air. Air in structures within a surface disposal site and at the property line of the surface disposal site shall be monitored continuously for methane gas during the period that the surface disposal site contains an active sewage sludge unit on which the sewage sludge is covered and for three years after a sewage sludge unit closes when a final cover is placed on the sewage sludge.
Statutory Authority: § 62.1-44.15 of the Code of Virginia; § 402 of the federal Clean Water Act; 40 CFR Parts 122, 123, 124, 403, and 503.
