7041.1100 Pollutant Limits


Published: 2015

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7041.1100 POLLUTANT LIMITS.


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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.


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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.


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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.


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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.




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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



1Dry 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



1On 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