South Carolina Code of Regulations
Chapter 61 - DEPARTMENT OF HEALTH AND ENVIRONMENTAL CONTROL
Subchapter 61-9 - Water Pollution Control Permits
Subchapter 61-9.504 - STANDARDS FOR THE USE OR DISPOSAL OF INDUSTRIAL SLUDGE
Appendix 61-9.504.A - PROCEDURE TO DETERMINE THE ANNUAL WHOLE SLUDGE APPLICATION RATE FOR AN INDUSTRIAL SLUDGE
Current through Register Vol. 48, No. 9, September 27, 2024
Section504.13(a)(4)(ii) requires that the product of the concentration for each pollutant listed in Table 4 of section504.13 in industrial sludge sold or given away in a bag or other container for application to the land and the annual whole sludge application rate (AWSAR) for the industrial sludge not cause the annual pollutant loading rate for the pollutant in Table 4 of section504.13(a)(4)(ii) to be exceeded. This appendix contains the procedure used to determine the AWSAR for an industrial sludge that does not cause the annual pollutant loading rates in Table 504.13(a)(4)(ii) of section504.13 to be exceeded
The relationship between the annual pollutant loading rate (APLR) for a pollutant and the annual whole sludge application rate (AWSAR) for an industrial sludge is shown in equation (1).
APLR = C × AWSAR × 0.001 (1)
Where:
APLR = Annual pollutant loading rate in kilograms per hectare per 365 day period.
C = Pollutant concentration in milligrams per kilogram of total solids (dry weight basis).
AWSAR = Annual whole sludge application rate in metric tons per hectare per 365 day period (dry weight basis).
0.001 = A conversion factor.
To determine the AWSAR, equation (1) is rearranged into equation (2):
AWSAR = APLR (2)
---------
C x 0.001
The procedure used to determine the AWSAR for an industrial sludge is presented below.
PROCEDURE:
1. Analyze a sample of the industrial sludge to determine the concentration for each of the pollutants listed in Table 4 of section504.13 in the industrial sludge.
2. Using the pollutant concentrations from Step 1 and the APLRs from Table 4 of section504.13, calculate an AWSAR for each pollutant using equation (2) above.
3. The AWSAR for the industrial sludge is the lowest AWSAR calculated in Step 2.
