[Code of Federal Regulations]

[Title 40, Volume 29]

[Revised as of July 1, 2006]

From the U.S. Government Printing Office via GPO Access

[CITE: 40CFR503.23]



[Page 837-838]

 

                   TITLE 40--PROTECTION OF ENVIRONMENT

 

         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)

 

PART 503_STANDARDS FOR THE USE OR DISPOSAL OF SEWAGE SLUDGE--Table of 

Contents

 

                       Subpart C_Surface Disposal

 

Sec.  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 Sec.  503.23 (a)(2) and (b), the 

concentration of each pollutant listed in Table 1 of Sec.  503.23 in 

sewage sludge placed on an active sewage sludge unit shall not exceed 

the concentration for the pollutant in Table 1 of Sec.  503.23.



Table 1 of Sec.   503.23--Pollutant Concentrations--Active Sewage Sludge

              Unit Without a Liner and Leachate Collection

------------------------------------------------------------------------

                                                           Concentration

                                                            (milligrams

                        Pollutant                          per kilograms

                                                               \1\)

------------------------------------------------------------------------

Arsenic.................................................              73

Chromium................................................             600

Nickel..................................................            420

------------------------------------------------------------------------

\1\ Dry weight basis.





    (2) Except as provided in Sec.  503.23(b), the concentration of each 

pollutant listed in Table 1 of Sec.  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



[[Page 838]]



the property line of the surface disposal site shall be determined.

    (ii) The concentration of each pollutant listed in Table 2 of Sec.  

503.23 in the sewage sludge shall not exceed the concentration in Table 

2 of Sec.  503.23 that corresponds to the actual distance in Sec.  

503.23(a)(2)(i).



Table 2 of Sec.   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 Sec.  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 Sec.  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 Sec.  

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.