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
Section R18-9-1007 - Management Practices and General Requirements

Universal Citation: AZ Admin Code R 18-9-1007

Current through Register Vol. 30, No. 52, December 27, 2024

A. An applicator of bulk biosolids that are not exceptional quality biosolids shall comply with the following management practices at each land application site, except a site where bulk biosolids are applied for reclamation. The applicator shall not:

1. Apply bulk biosolids to soil with a pH less than 6.5 at the time of the application, unless the biosolids are treated under one of the procedures in subsections R18-9-1006(D)(2), R18-9-1006(E)(3), or R18-9-1010(A)(6), or the soil and biosolids mixture has a pH of 6.5 or higher immediately after land application;

2. Apply bulk biosolids to land with slopes greater than 6%, unless the site is operating under an AZPDES permit or a permit issued under section 402 of the Clean Water Act ( 33 U.S.C. 1342);

3. Apply bulk biosolids to land under the following conditions:
a. Bulk biosolids with Class A pathogen reduction. If the depth to groundwater is five feet (1.52 meters) or less;

b. Bulk biosolids with Class B pathogen reduction.
i. If the depth to groundwater is 10 feet (3.04 meters) or less; or

ii. To gravel, coarse or medium sands, or sands with less than 15% coarse fragments, if the depth to groundwater is 40 feet (12.2 meters) or less from the point of application of biosolids;

4. Apply bulk biosolids to land that is 32.8 feet (10 meters) or less from navigable waters;

5. Store or apply bulk biosolids closer than 1000 feet (305 meters) from a public or semi-public drinking water supply well or no closer than 250 feet (76.2 meters) from any other water well;

6. Store or apply bulk biosolids within 25 feet (7.62 meters) of a public right-of-way or private property line unless the applicator receives permission to apply bulk biosolids from the land owner or lessee of the adjoining property;

7. Apply bulk biosolids at an application rate greater than the agronomic rate of the vegetation or crop grown on the site;

8. Apply domestic septage or any other bulk biosolids with less than 10% solids at a rate that exceeds the annual application rate, calculated in gallons per acre for a 365-day period by dividing the amount of nitrogen needed by the crop or vegetation grown on the land, in pounds per acre per 365-day period, by 0.0026;

9. Apply bulk biosolids to land that is flooded, frozen, or snow-covered, so that the bulk biosolids enter a wetland or other navigable waters, except as provided in an AZPDES permit or a permit issued under section 402 of the Clean Water Act ( 33 U.S.C. 1342);

10. Apply any additional bulk biosolids before a crop is grown on the site if the site has received biosolids containing nitrogen at the equivalent of the agronomic rate appropriate for that crop;

11. Exceed the irrigation needs of the crop of an application site;

12. To minimize odors, apply bulk biosolids within 1000 feet (305 meters) of a dwelling unless the biosolids are injected or incorporated into the soil within 10 hours of being applied; or

13. Store bulk biosolids within 1000 feet (305 meters) of a dwelling unless the applicator obtains permission from the dwelling owner or lessee to store the biosolids at a shorter distance from the dwelling. If the dwelling owner or lessee changes, the applicator shall obtain permission from the new dwelling owner or lessee to continue to store the bulk biosolids within 1000 feet of the dwelling or move the biosolids to a location at least 1000 feet from the dwelling.

B. If biosolids are placed in a bag or other container, the person who prepares the biosolids shall distribute a label or information sheet to the person receiving the material. This label or information sheet shall, at a minimum, contain the following information:

1. The identity and address of the person who prepared the biosolids;

2. Instructions on the proper use of the material, including agronomic rates and an annual application rate that ensures that the annual pollutant rates established in R18-9-1005 are not exceeded; and

3. A statement that application of biosolids to the land shall not exceed application rates described in the instructions on the label or information sheet.

Disclaimer: These regulations may not be the most recent version. Arizona may have more current or accurate information. We make no warranties or guarantees about the accuracy, completeness, or adequacy of the information contained on this site or the information linked to on the state site. Please check official sources.
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