Ariz. Admin. Code § tit. 18, ch. 9, art. 10, app A

Current through Register Vol. 30, No. 50, December 13, 2024

Appendix A - Procedures to Determine Annual Biosolids Application Rates

The following procedure determines the annual biosolids application rate (ABAR) that ensures that the annual pollutant loading rates in Table 3 of R18-9-1005 are not exceeded.

1. The relationship between the annual pollutant loading rate (APLR) for a pollutant and the ABAR is shown in the following equation.

APLR = C x ABAR x 0.001

APLR = Annual pollutant loading rate in kilograms of biosolids, per hectare, per 365-day period;

C = Pollutant concentration in milligrams, per kilogram of total solids (dry-weight basis);

ABAR = Annual biosolids application rate in metric tons, per hectare, per 365-day period (dry-weight basis); and

0.001 = A conversion factor.

metric ton = 1.102 short tons

hectare = 2.471 acres

2. The ABAR is calculated using the following procedure:

a. Analyze a biosolids sample to determine a concentration for each of the pollutants listed in Table 3 of R18-9-1005; and

b. Using each of the pollutant concentrations from subsection (2)(a) and the APLRs from Table 3 of R18-9-1005, calculate a separate ABAR for each pollutant using the following equation:

Click here to view Image

c. The ABAR for biosolids is the lowest value calculated in under subsection (2)(b) for any pollutant.

Ariz. Admin. Code tit. 18, ch. 9, art. 10, app A

New Appendix recodified from 18 A.A.C. 13, Article 15 at 7 A.A.R. 2522, effective May 24, 2001 (Supp. 01-2). Amended by final rulemaking at 7 A.A.R. 5879, effective December 7, 2001 (Supp. 01-4).