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 R18-9-1005 - Pollutant Concentrations

Universal Citation: AZ Admin Code R 18-9-1005

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

A. A person shall not apply biosolids with pollutant concentrations that exceed any of the ceiling concentrations established in Table 1.

B. A person shall not apply biosolids sold or given away in a bag or other container that are not exceptional quality biosolids to a site if any annual pollutant loading rate in Table 3 will be exceeded. A person shall determine annual application rates using the methodology established in Appendix A.

C. A person shall not apply bulk biosolids to a lawn or garden unless the biosolids are exceptional quality biosolids.

D. Unless using exceptional quality biosolids, a person shall not apply bulk biosolids to a site when:

1. The pollutant concentrations exceed the levels in Table 2, or

2. Any cumulative pollutant loading rate in Table 4 will be exceeded. A person shall determine compliance with the site cumulative pollutant loading rates using the following:
a. By identifying all known biosolids application events and information relevant to a site since September 13, 1979.

b. By calculating the existing cumulative level of the pollutants established in Table 4 using actual analytical data from the application events or if actual analytical data from application events before April 1996 are not available, background concentrations determined by taking representative soil samples of the site, if it is known that the site received biosolids before April 1996.

c. Background soil tests are not required for those sites that have not received biosolids before April 23, 1996.

Table 1. Ceiling Concentrations

Pollutant

Ceiling concentrations (milligrams per kilogram) (1)

Arsenic

75.0

Cadmium

85.0

Chromium

3000.0

Copper

4300.0

Lead

840.0

Mercury

57.0

Molybdenum

75.0

Nickel

420.0

Selenium

100.0

Zinc

7500.0

(1) Dry-weight basis.

Table 2. Monthly Average Pollutant Concentrations

Pollutant

Concentration limits (milligrams per kilogram) (1)

Arsenic

41.0

Cadmium

39.0

Copper

1500.0

Lead

300.0

Mercury

17.0

Nickel

420.0

Selenium

100.0

Zinc

2800.0

(1) Dry-weight basis.

Table 3. Annual Pollutant Loading Rates

Pollutant

Annual pollutant loading rates (in kilograms per hectare)

Arsenic

2.0

Cadmium

1.9

Copper

75.0

Lead

15.0

Mercury

0.85

Nickel

21.0

Selenium

5.0

Zinc

140.0

Table 4. Cumulative Pollutant Loading Rates

Pollutant

Cumulative pollutant loading rates (in kilograms per hectare)

Arsenic

41.0

Cadmium

39.0

Copper

1500.0

Lead

300.0

Mercury

17.0

Nickel

420.0

Selenium

100.0

Zinc

2800.0

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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