9VAC25-31-630. Pollutant limits (other than domestic septage)

A. Active sewage sludge unit without a liner and leachate collection system. 1. Except as provided in subdivision A 2 and subsection B of this section, the concentration of each pollutant listed in Table 1 of this section in sewage sludge placed on an active sewage sludge unit shall not exceed the concentration for the pollutant in Table 1 of this section. TABLE 1. POLLUTANT CONCENTRATIONS--ACTIVE SEWAGE SLUDGE UNIT WITHOUT A LINER AND LEACHATE COLLECTION TABLE 1. POLLUTANT CONCENTRATIONS--ACTIVE SEWAGE SLUDGE UNIT WITHOUT A LINER AND LEACHATE COLLECTION Pollutant Concentration Concentration (milligrams per kilogram*) Pollutant Concentration Concentration (milligrams per kilogram*) Arsenic 73 Arsenic 73 Chromium 600 Chromium 600 Nickel 420 Nickel 420 *Dry weight basis *Dry weight basis 2. Except as provided in subsection B of this section, the concentration of each pollutant listed in Table 1 of this section 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. a. The actual distance from the active sewage sludge 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 this section in the sewage sludge shall not exceed the concentration in Table 2 of this section that corresponds to the actual distance in subdivision 2 a of this subsection. TABLE 2--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 TABLE 2--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* Unit boundary to property line Pollutant concentration* Distance (meters) Arsenic (mg/kg) Chromium (mg/kg) Nickel (mg/kg) Distance (meters) Arsenic (mg/kg) Chromium (mg/kg) Nickel (mg/kg) 0 to less than 25 30 200 210 0 to less than 25 30 200 210 25 to less than 50 34 220 240 25 to less than 50 34 220 240 50 to less than 75 39 260 270 50 to less than 75 39 260 270 75 to less than 100 46 300 320 75 to less than 100 46 300 320 100 to less than 125 53 360 390 100 to less than 125 53 360 390 125 to less than 150 62 450 420 125 to less than 150 62 450 420 *Dry weight basis *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 subdivision B 2 of this section for an active sewage sludge unit without a liner and leachate collection system when the existing values for site parameters specified by the department are different from the values for those parameters used to develop the pollutant limits in Table 1 of this section and when the department 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 this section 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 department, or the existing concentration of the pollutant in the sewage sludge, whichever is lower.