Vector Attraction Reduction

Attractiveness of biosolids to vectors, which are animals and insects such as rodents, flies, and birds, is the third parameter of biosolids quality. Part 503

TABLE 10.1 Land Application Pollutant Limits

Ceiling Pollutant Cumulative Annual

Concentration Concentration Pollutant Pollutant

Limits2 '' Limitsflcd Loading Rates Loading Rates

Pollutant

mg/kg

lb/ton

mg/kg

lb/ton

kg/ha

lb/ac

kg/ha • yr

lb/ac-yr

Arsenic

75

0.15

41

0.08

41

37

2.0

1.78

Cadmium

85

0.17

39

0.08

39

35

1.9

1.70

Chromium

3000

6.00

1200

2.40

3000

2680

150

133.90

Copper

4300

8.60

1500

3.00

1500

1338

75

66.91

Lead

840

1.68

300

0.60

300

268

15

13.38

Mercury

57

0.11

17

0.03

17

15

0.85

0.76

Molybdenum

75

0.15

Nickel

420

0.84

420

0.84

420

374

21

18.74

Selenium

100

0.20

36

0.07

100

89

5

4.46

Zinc

7500

15.00

2800

15.00

2800

2498

140

124.91

Applies to:

All biosolids that

Bulk biosolids and

Bulk biosolids

Biosolids sold

or

are land applied

biosolids sold

or

given away in

a bag

given away in a or other container bag or other container given away in a or other container bag or other container

" Dry weight basis. b Absolute values. c Monthly averages. d Exceptional quality biosolids.

allows 10 options to reduce vector attractiveness, which are described in Table 1.11. (Options 11 and 12 in the table are vector attraction reduction options for surface disposal of biosolids and treatment of domestic septage, respectively.) Options in Table 1.11 include some stabilization processes that reduce pathogens; therefore, vector attraction reduction alternatives can be combined with pathogen reduction alternatives for an acceptable land application project using class B biosolids.

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