Wyoming Administrative Code
Agency 020 - Environmental Quality, Dept. of
Sub-Agency 0011 - Water Quality
Chapter 15 - USE OF SURFACE DISPOSAL OF BIOSOLIDS, APP. A-C
Part C - SURFACE DISPOSAL
Appendix A - Procedure to Determine The Annual Whole Sludge Application Rate For Biosolids

Section 14(a) (iv) (B) requires that the product of the concentration for each pollutant listed in Table 4 of Section 14 in biosolids 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 biosolids not cause the annual pollutant loading rate for the pollutant in Table 4 of Section 14 to be exceeded. This appendix contains the procedure used to determine the AWSAR for a biosolids that does not cause the annual pollutant loading rates in Table 4 of Section 14 to be exceeded.

The relationship between the annual pollutant loading rate (APLR) for a pollutant and the annual whole sludge application rate (AWSAR) for a biosolids is shown in equation (1).

APLR = C x AWSAR X 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 a biosolids is presented below. PROCEDURE:

(i) Analyze a sample of the biosolids to determine the concentration for each of the pollutants listed in Table 4 of Section 14 in the biosolids.

(ii) Using the pollutant concentrations from Step 1 and the APLRs from Table 4 of Section 14, calculate an AWSAR for each pollutant using equation (2) above.