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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

 

Pollutant Concentration

Concentration
(milligrams per kilogram*)

 

Arsenic

73

 

Chromium

600

 

Nickel

420

 

*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

 

Unit boundary to property line

Pollutant concentration*

 

Distance
(meters)

Arsenic
(mg/kg)

Chromium
(mg/kg)

Nickel
(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

 

*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 board are different from the values for those parameters used to develop the pollutant limits in Table 1 of this section and when the board 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 board, or the existing concentration of the pollutant in the sewage sludge, whichever is lower.

Statutory Authority

62.1-44.15, 62.1-44.16, 62.1-44.17, 62.1-44.18, and 62.1-44.19 of the Code of Virginia.

Historical Notes

Derived from Virginia Register Volume 12, Issue 20, eff. July 24, 1996.


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