Arizona Administrative Code
Title 18 - ENVIRONMENTAL QUALITY
Chapter 9 - DEPARTMENT OF ENVIRONMENTAL QUALITY - WATER POLLUTION CONTROL
Article 10 - ARIZONA POLLUTANT DISCHARGE ELIMINATION SYSTEM - DISPOSAL, USE, AND TRANSPORTATION OF BIOSOLIDS
Appendix A - Procedures to Determine Annual Biosolids Application Rates
Current through Register Vol. 30, No. 52, December 27, 2024
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:
