Food crops and cattle grazing are allowed on a surface disposal site, but it must be demonstrated
that it is safe -- and -- a collection system for the runoff from a 24 hour storm event must be in place.

BIOSOLIDS MAY BE TO CONTAMINATED TO BE DISPOSED OF UNDER THIS SECTION
Bosolids is not a legal name under the regulations
Electronic Code of Federal Regulations (e-CFR)
BETA TEST SITE
e-CFR Data is current as of November 22, 2005




Title 40: Protection of Environment
PART 503—STANDARDS FOR THE USE OR DISPOSAL OF SEWAGE SLUDGE
Subpart C—Surface Disposal


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§ 503.23   Pollutant limits (other than domestic septage).
(a) Active sewage sludge unit without a liner and leachate collection system.

(1) Except as provided in §503.23 (a)(2) and (b), the concentration of each pollutant listed in Table 1
of §503.23 in sewage sludge placed on an active sewage sludge unit shall not exceed the
concentration for the pollutant in Table 1 of §503.23.


Table 1 of § 503.23_
Pollutant Concentrations_Active
Sewage Sludge
Unit Without a Liner and Leachate Collection
------------------------------------------------------------------------
                                            Concentration
                                             (milligrams
         Pollutant                          per kilograms
                                                 1)
------------------------------------------------------------------------
Arsenic.................................................              73   
(75 allowed as fertilizer)          
Chromium................................................             600  
(100,000 ppm limit as fertilizer. )
Nickel..................................................            420
------------------------------------------------------------------------
(no limit of Cadmium and other pollutants)
1 Dry weight basis.


(2) Except as provided in §503.23(b), the concentration of each pollutant listed in Table 1 of §503.23
in sewage sludge placed on an active sewage sludge unit whose boundary is less than 150 meters
from the property line of the surface disposal site shall not exceed the concentration determined
using the following procedure.

(i) The actual distance from the active sewage sludge unit boundary to the property line of the
surface disposal site shall be determined.

(ii) The concentration of each pollutant listed in Table 2 of §503.23 in the sewage sludge shall not
exceed the concentration in Table 2 of §503.23 that corresponds to the actual distance in §503.23(a)
(2)(i).


Table 2 of § 503.23_Pollutant Concentrations_Active Sewage Sludge
Unit Without a Liner and Leachate Collection System That Has a Unit
Boundary to Property Line Distance Less Than 150 Meters
------------------------------------------------------------------------
Unit boundary to property line         Pollutant concentration 1
------------------------------------------------------------------------
                             Arsenic   Chromium   Nickel
Distance (meters)               (mg/kg)   (mg/kg)    (mg/kg)
------------------------------------------------------------------------
0 to less than 25........................        30        200       210
25 to less than 50.......................        34        220       240
50 to less than 75.......................        39        260       270
75 to less than 100......................        46        300       320
100 to less than 125.....................        53        360       390
125 to less than 150.....................        62        450      420
------------------------------------------------------------------------
1 Dry weight basis.


(b) Active sewage sludge unit without a liner and leachate collection system—site-specific limits.

(1) At the time of permit application, the owner/operator of a surface disposal site may request site-
specific pollutant limits in accordance with §503.23(b)(2) for an active sewage sludge unit without a
liner and leachate collection system when the existing values for site parameters specified by the
permitting authority are different from the values for those parameters used to develop the pollutant
limits in Table 1 of §503.23 and when the permitting authority determines that site-specific pollutant
limits are appropriate for the active sewage sludge unit.

(2) The concentration of each pollutant listed in Table 1 of §503.23 in sewage sludge placed on an
active sewage sludge unit without a liner and leachate collection system shall not exceed either the
concentration for the pollutant determined during a site-specific assessment, as specified by the
permitting authority, or the existing concentration of the pollutant in the sewage sludge, whichever is
lower.


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Last updated: July 27, 2005
503.9(t) Pollutant is an organic substance,
an
inorganic substance, a combination of
organic and inorganic substances
, or a
pathogenic organism that, after discharge
and upon exposure, ingestion, inhalation, or
assimilation into an organism either directly
from the environment or indirectly by
ingestion through the food chain, could, on
the basis of information available to the
Administrator of EPA,
cause death, disease,
behavioral abnormalities
, cancer, genetic
mutations, physiological malfunctions
(including malfunction in reproduction), or
physical deformations in either organisms
(humans) or offspring (children)of the
organism
s
Exception Quality sludge

Arsenic    Chromium          Nickel
41 ppm    100,000 ppm     420 ppm