La. Admin. Code tit. 33 § IX-7397

Current through Register Vol. 50, No. 11, November 20, 2024

Section IX-7397 - Procedure to Determine the Annual Whole Biosolids Application Rate (AWBAR)- Appendix K [Formerly Section 7131]

A. LAC 33:IX.7303.E.1.d.ii requires that the product of the concentration for each pollutant listed in Table 4 of LAC 33:IX.7303.E in biosolids sold or given away in a bag or other container for application to the land and the annual whole biosolids application rate (AWBAR) not cause the annual pollutant loading rate for the pollutant in Table 4 of LAC 33:IX.7303.E to be exceeded. This Appendix contains the procedure used to determine the AWBAR for a sewage sludge that does not cause the annual pollutant loading rates in Table 4 of LAC 33:IX.7303.E to be exceeded.

B. The relationship between the annual pollutant loading rate (APLR) for a pollutant and the AWBAR is shown in Equation (1).

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where:

APLR = annual pollutant loading rate in kilograms per hectare per 365-day period

C = pollutant concentration in milligrams per kilogram of total solids (dry weight basis)

AWBAR = annual whole biosolids application rate in metric tons per hectare per 365-day period (dry weight basis) 0.001

= a conversion factor

C. To determine the AWBAR, Equation (1) is rearranged into Equation (2).

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D. The procedure used to determine the AWBAR is presented below.

1. Analyze a sample of the biosolids to determine the concentration for each of the pollutants listed in Table 4 of LAC 33:IX.7303.E in the biosolids.

2. Using the pollutant concentrations from Step 1 and the APLRs from Table 4 of LAC 33:IX.7303.E, calculate an AWBAR for each pollutant using Equation (2) above.

3. The AWBAR for the biosolids is the lowest AWBAR calculated in Step 2.

La. Admin. Code tit. 33, § IX-7397

Promulgated by the Department of Environmental Quality, Office of Environmental Assessment, Environmental Planning Division, LR 28:817 (April 2002), repromulgated LR 30:233 (February 2004), amended by the Office of the Secretary, Legal Affairs Division, LR 33:2417 (November 2007).

AUTHORITY NOTE: Promulgated in accordance with R.S. 30:2001 et seq., and in particular Section 2074(B)(1)(c), (B)(3), and (B)(4).