15A ncac 02T .1105       POLLUTANT LIMITS

(a)  Bulk residuals or residuals that are sold or given away in a bag or other container shall not be applied to the land if the concentration of any pollutant in the residuals exceeds the ceiling concentration for that pollutant as stipulated in the following (i.e., on a dry weight basis):

 

Pollutant                                Ceiling Concentration

                                                (milligrams per kilogram)

Arsenic                                                   75

Cadmium                                              85

Copper                                                   4,300

Lead                                                       840

Mercury                                                 57

Molybdenum                                       75

Nickel                                                     420

Selenium                                               100

Zinc                                                        7,500

 

(b)  Bulk residuals shall not be applied to the land if the land application causes the exceedance of the cumulative pollutant loading rate for any pollutant as stipulated in the following (i.e., on a dry weight basis):

 

Pollutant                                Cumulative Pollutant

                                                      Loading Rate

                                                (kilograms per hectare)

Arsenic                                                   41

Cadmium                                              39

Copper                                                   1,500

Lead                                                       300

Mercury                                                 17

Nickel                                                     420

Selenium                                               100

Zinc                                                        2,800

 

(1)           A person shall determine compliance with the cumulative pollutant loading rates using one of the following methods:

(A)          by calculating the existing cumulative level of pollutants using actual analytical data from all historical land application events of residuals not otherwise exempted by this Paragraph or

(B)          for land on which land application events of residuals has not occurred or for which the data required in Rule .1105(b) is incomplete, by determining background concentrations through representative soil sampling.

(2)           When applied to the land, bulk residuals shall be exempt from complying with this Paragraph as long as they meet all of the following criteria:

(A)          the monthly average concentrations stipulated in Rule .1105(c) of this Section.

(B)          the pathogen reduction requirements stipulated in Rule .1106(b) of this Section, and

(C)          the vector attraction reduction requirements stipulated in Rule .1107 of this Section.

(c)  Bulk residuals shall not be applied to a lawn, home garden, or public contact use site nor shall residuals be sold or given away in a bag or other container for application to the land if the concentration of any pollutant in the residuals exceeds the concentration for that pollutant as stipulated in the following (i.e., on a dry weight basis):

 

Pollutant                                Monthly Average Concentration

                                                     (milligrams per kilogram)

Arsenic                                                   41

Cadmium                                              39

Copper                                                   1,500

Lead                                                       300

Mercury                                                 17

Nickel                                                     420

Selenium                                               100

Zinc                                                        2,800

 

(d)  Bulk residuals shall not be placed in a surface disposal unit if the concentration of any pollutant in the residuals exceeds the concentration for that pollutant as stipulated in the following (i.e., on a dry weight basis):

 

Distance from Surface Disposal Unit                                 Ceiling Concentration

Boundary to Closest Property Line                                  (milligrams per kilogram)

                       (meters)

                                                                                  Arsenic Chromium            Nickel

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 and greater                                                          62                          450                      420

 

History Note:        Authority G.S. 143-215.1; 143-215.3(a);

Eff. September 1, 2006.