Minnesota Administrative Rules
Pollution Control Agency
7041 - SEWAGE SLUDGE MANAGEMENT
7041.1100 - POLLUTANT LIMITS.

Universal Citation: MN Rules 7041.1100
7041.1100 POLLUTANT LIMITS.
Subpart 1. Ceiling concentrations.

Bulk sewage sludge or sewage sludge sold or given away in a bag or other container must not be applied to the land if the concentration of any pollutant in the sewage sludge exceeds the ceiling concentration for the pollutant in subpart 4, item A.

Subp. 2. Cumulative loading rates.

If bulk sewage sludge is applied to agricultural land, forest, a public contact site, or a reclamation site, either the cumulative loading rate for each pollutant must not exceed the cumulative pollutant loading rate for each pollutant in subpart 4, item B, or the bulk sewage sludge must be exceptional quality sewage sludge.

Subp. 3. Pollutant concentrations.

The conditions in items A and B apply to pollutant concentrations in bulk sewage sludge and sewage sludge sold or given away in a bag or other container.

A. If bulk sewage sludge is applied to a lawn or a home garden, the concentration of each pollutant in the sewage sludge must not exceed the concentration for the pollutant in subpart 4, item C.

B. If sewage sludge is sold or given away in a bag or other container for application to the land, either:

(1) the concentration of each pollutant in the sewage sludge must not exceed the concentration for the pollutant in subpart 4, item C; or

(2) the product of the concentration of each pollutant in the sewage sludge and the annual whole sludge application rate for the sewage sludge must not cause the annual pollutant loading rate for the pollutant in subpart 4, item D, to be exceeded. The procedure used to determine the annual whole sludge application rate is outlined in part 7041.3100.

Subp. 4. Pollutant concentrations and loading rates. Pollutant concentrations and loading rates are given in items A to D.

A. Ceiling concentrations.

Pollutant Ceiling Concentration (mg/kg)1
Arsenic 75
Cadmium 85
Copper 4300
Lead 840
Mercury 57
Molybdenum 75
Nickel 420
Selenium 100
Zinc 7500

1 Dry weight basis

B. Cumulative pollutant loading rates.

Pollutant Rate (kg/ha) Rate (lbs/ac)
Arsenic 41 37
Cadmium 39 35
Copper 1500 1339
Lead 300 268
Mercury 17 15
Nickel 420 375
Selenium 100 89
Zinc 2800 2500

C. Pollutant concentrations.

Pollutant Monthly Average Concentrations (mg/kg)1
Arsenic 41
Cadmium 39
Copper 1500
Lead 300
Mercury 17
Nickel 420
Selenium 100
Zinc 2800

1 On a dry weight basis, the arithmetic mean of all measurements taken during the month.

D. Annual pollutant loading rates per 365-day period.

Pollutant Rate (kg/ha) Rate (lb/ac)
Arsenic 2.0 1.8
Cadmium 1.9 1.7
Copper 75.0 67.0
Lead 15.0 13.0
Mercury 0.85 0.76
Nickel 21.0 19.0
Selenium 5.0 4.5
Zinc 140.0 125.0
Statutory Authority:

MS s 116.07

History:

21 SR 1642

Published Electronically:

October 27, 2003

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