(a) Active
biosolids unit without a liner and leachate collection system.
(i) Except as provided in Section 23(a) (ii)
and 23(b), the concentration of each pollutant listed in Table 1 of Section 23
in biosolids placed on an active biosolids unit shall not exceed the
concentration listed for the pollutant in Table 1 of Section 23.
Table 1 Of Section 23
Pollutant Concentrations - Active Biosolid Unit
Without a Liner And Leachate Collection System
Pollutant
Arsenic
Chromium
Nickel Concentration
(milligrams per kilogram*)
73
600
420
* Dry weight basis
(ii) Except as provided in Section 23(b), the
concentration of each pollutant listed in Table 1 of Section 23 in biosolids
placed on an active biosolids unit with a boundary less than 150 meters from
the property line of the surface disposal site shall not exceed the
concentration determined using the following procedure.
(A) The actual distance from the active
biosolids unit boundary to the property line of the surface disposal site shall
be determined.
(B) The
concentration of each pollutant listed in Table 2 of Section 23 in the
biosolids shall not exceed the concentration in Table 2 of Section 23 that
corresponds to the actual distance in Section 23(a) (ii) (A).
Table 2 Of Section 23
Pollutant Concentrations - Active Biosolids Unit Without a
Liner and Leachate Collection System That Has a Unit Boundary to Property Line
Distance less than 150 Meters
Pollutant concentration*
Unit boundary to
property line
distance (meters)
0 to less than 25
25 to less than 50
50 to less than 75
75 to less than 100
100 to less than 125
125 to less than 150
Arsenic
(mg/kg)
30
34
39
46
53
62
Chromium
(mg/kg)
200
220
260
300
360
450
Nickel
(mg/kg)
210
240
270
320
390
420
* Dry weight basis
(b) Active biosolids unit without a liner and
leachate collection system - site-specific limits.
(i) At the time of permit application, the
owner/operator of a surface disposal site may request site-specific pollutant
limits in accordance with Section 23(b) (ii) for an active biosolids 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
Section 23 and when the permitting authority determines that site-specific
pollutant limits are appropriate for the active biosolids unit.
(ii) The concentration of each pollutant
listed in Table 1 of Section 23 in biosolids placed on an active biosolids 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 biosolids, whichever is lower.
