Ariz. Admin. Code § R18-9-1005 - Pollutant Concentrations

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

Notes

Ariz. Admin. Code § R18-9-1005

New Section recodified from R18-13-1505 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). Amended by final rulemaking at 8 A.A.R. 4923, effective January 5, 2003 (Supp. 02-4).