Md. Code Regs. 26.04.06.05
Current through Register Vol. 51, No. 22, November 1, 2024
Section 26.04.06.05 - Constituent Limits for Sewage SludgeA. Specific Constituent Limitations for Sewage Sludge. (1) The following constituent limitations apply to application of sewage sludge: (a) Bulk sewage sludge may not be applied to the land if the concentration of any constituent in the sewage sludge exceeds the ceiling concentration for the constituent in Table 1 of §B(1) of this regulation;(b) Bulk sewage sludge may not be applied to agricultural or marginal land, forest, or a public contact site if either: (i) The cumulative loading rate for any constituent exceeds the cumulative constituent loading rate for the constituent in Table 2 of §B(2) of this regulation; or(ii) The concentration of any constituent in the sewage sludge exceeds the concentration for the constituent in Table 3 of §B(3) of this regulation;(c) Bulk sewage sludge may not be applied to a lawn or a home garden if the concentration of any constituent in the sewage sludge exceeds the concentration for the constituent in Table 3 of §B(3) of this regulation; and(d) Sewage sludge may not be sold or given away in a bag or other container for application to the land if:(i) The concentration of any constituent in the sewage sludge exceeds the concentration for the constituent in Table 3 of §B(3) of this regulation; or(ii) The product of the concentration of any constituent in the sewage sludge and the whole annual sewage sludge application rate for the sewage sludge causes the annual constituent loading rate for the constituent in Table 4 of §B(4) of this regulation to be exceeded.(2) Determination of Annual Whole Sewage Sludge Application Rate (AWSAR). (a) The following equation expresses the relationship between the AWSAR in metric tons per hectare per 365 day period on a dry weight basis and the annual constituent loading rate (ACLR) in kilograms per hectare per 365 day period for a constituent: Equation # 1: AWSAR = ACLR/(C x 0.001)
Where:
C = Constituent concentration in milligrams per kilogram of total solids, in dry weight basis; and
0.001 = A conversion factor.
(b) To determine the AWSAR for sewage sludge, a person shall sequentially do the following: (i) Step 1 - analyze a sample of the sewage sludge to determine the concentration for each of the constituents listed in Table 4 of §B(4) of this regulation;(ii) Step 2 - using the constituent concentrations from Step 1 and the ACLRs from Table 4 of §B(4) of this regulation, calculate an AWSAR for each constituent using Equation # 1 from §A(2)(a) of this regulation; and(iii) Step 3 - identify as the AWSAR for the sewage sludge the lowest AWSAR calculated in Step 2. B. Constituent Concentrations and Loading Rates - Sewage Sludge. (1) Ceiling Concentrations. Table 1 - Ceiling Concentrations
| Constituent | Ceiling Concentration
(milligrams per kilogram)* |
| Arsenic (As) | 75 |
| Cadmium (Cd) | 85 |
| Copper (Cu) | 4,300 |
| Lead (Pb) | 840 |
| Mercury (Hg) | 57 |
| Molybdenum (Mo) | 75 |
| Nickel (Ni) | 420 |
| Selenium (Se) | 100 |
| Zinc (Zn) | 7500 |
| PCBs | 10 |
(2) Cumulative Constituent Loading Rates. Table 2 - Cumulative Constituent Loading Rates
| Constituent | Cumulative Constituent Loading Rates
(kilograms per hectare) |
| Arsenic (As) | 41 |
| Cadmium (Cd) | 39 |
| Copper (Cu) | 1,500 |
| Lead (Pb) | 300 |
| Mercury (Hg) | 17 |
| Nickel (Ni) | 420 |
| Selenium (Se) | 100 |
| Zinc (Zn) | 2800 |
(3) Constituent Concentrations. Table 3 - Constituent Concentrations
| Constituent | Monthly Average Concentration
(milligrams per kilogram)* |
| Arsenic (As) | 41 |
| Cadmium (Cd) | 39 |
| Copper (Cu) | 1,500 |
| Lead (Pb) | 300 |
| Mercury (Hg) | 17 |
| Nickel (Ni) | 420 |
| Selenium (Se) | 100 |
| Zinc (Zn) | 2800 |
(4) Annual Constituent Loading Rates. Table 4 - Annual Constituent Loading Rates
| Constituent | Annual constituent loading rates
(kilograms per hectare per 365 day period) |
| Arsenic (As) | 2.0 |
| Cadmium (Cd) | 1.9 |
| Copper (Cu) | 75 |
| Lead (Pb) | 15 |
| Mercury (Hg) | 0.85 |
| Nickel (Ni) | 21 |
| Selenium (Se) | 5.0 |
| Zinc (Zn) | 140 |
Md. Code Regs. 26.04.06.05
Regulations .05 amended effective August 3, 1981 (8:15 Md. R. 1307)
Regulations .05, Sewage Sludge Management, adopted effective November 3, 1986 (13:22 Md. R. 2399)
Regulations .05 adopted effective 41:10 Md. R. 562, eff.5/26/2014