020-15 Wyo. Code R. § 14

Current through April 27, 2019

Section 14 - Pollutant limits

(a) Biosolids.

• (i) Bulk biosolids or biosolids sold or given away in a bag or other container shall not be applied to the land if the concentration of any pollutant in the biosolids exceeds the ceiling concentration for the pollutant in Table 1 of Section 14.

• (ii) If bulk biosolids are applied to agricultural land, forest, a public contact site, or a reclamation site, either:
  • (A) The cumulative loading rate for each pollutant shall not exceed the cumulative pollutant loading rate for the pollutant in Table 2 of Section 14; or
  • (B) The concentration of each pollutant in the biosolids shall not exceed the concentration for the pollutant in Table 3 of Section 14.

• (iii) If bulk biosolids are applied to a lawn or a home garden, the concentration of each pollutant in the biosolids shall not exceed the concentration for the pollutant in Table 3 of Section 14.

• (iv) If biosolids are sold or given away in a bag or other container for application to the land, either:
  • (A) The concentration of each pollutant in the biosolids shall not exceed the concentration for the pollutant in Table 3 of Section 14; or
  • (B) The product of the concentration of each pollutant in the biosolids and the annual whole sludge application rate for the biosolids shall not cause the annual pollutant loading rate for the pollutant in Table 4 of Section 14 to be exceeded. The procedure used to determine the annual whole sludge application rate is presented in Appendix A of this chapter.

(b) Pollutant concentrations and loading rates - biosolids.

• (i) Ceiling concentrations.

  Table 1 of Section 14

  Copper

  Lead

  Mercury

  Molybdenum

  Nickel

  Selenium

  Zinc Ceiling Concentration

  (milligrams per kilogram)*

  75

  85

  4300

  840

  57

  75

  420

  100

  7500

  * Dry weight basis

• (ii) Cumulative pollutant loading rates.

  Table 2 of Section 14

  Pollutant

  Arsenic

  Cadmium

  Copper

  Lead

  Mercury

  Molybdenum

  Nickel

  Zinc

  Cumulative Pollutant Loading Rate

  (kilograms per hectare)

  41

  39

  1500

  300

  17

  -*

  420

  2800

  * Currently under review by EPA.

• (iii) Pollutant concentrations. Table 3 of Section 14

  Pollutant

  Arsenic

  Cadmium

  Copper

  Lead

  Mercury

  Molybdenum

  Nickel

  Selenium

  Zinc Pollutant concentrations

  (milligrams per kilogram)*

  41

  39

  1500

  300

  17

  -**

  420

  100

  2800

  * Dry weight basis.

  ** Currently under review by EPA.

• (iv) Annual pollutant loading rates.

  Table 4 of Section 14

Pollutant

Arsenic

Cadmium

Copper

Lead

Mercury

Molybdenum

Nickel

Zinc Annual Pollutant Loading Rate

(kilograms per hectare per 365 day period)

2.0

1.9

75

15

0.85

-*

21

140

* Currently under review by EPA.

(c) Domestic septage. The annual application rate for domestic septage applied to agricultural land, forest, or a reclamation site shall not exceed the annual application rate calculated using equation (1).

AAR = N/0.0026 Eq.(1)

Where:

AAR = Annual application rate in gallons per acre per 365 day period.

N = Amount of nitrogen in pounds per acre per 365 day period needed by the crop or vegetation grown on the land.

020-15 Wyo. Code R. § 14