N.J. Admin. Code § 7:26F-3.5

Current through Register Vol. 56, No. 21, November 4, 2024

Section 7:26F-3.5 - Initiating soil remediation with delineation

(a) An owner electing to initiate soil remediation by first delineating contaminated soil shall:

1. Install a minimum of four soil borings, no more than 10 feet from where the discharge was discovered, in four equal directions (for example, north, south, east, and west);

2. Field screen each boring;

3. Continue to install additional soil borings horizontally and vertically and conduct field screening until field screening indicates no further contamination or until bedrock is encountered;

4. Collect a sufficient number of soil samples from the soil borings to confirm delineation horizontally (all directions) and vertically when field screening indicates no further contamination; and

5. Collect a ground water sample pursuant to N.J.A.C. 7:26F-4.2when contamination extends to within two feet of either bedrock or ground water .

(b) When the delineation of the horizontal and vertical extent of the soil contamination is complete, the owner shall implement an in situ remedial action, excavate the contaminated soil to the extent of the delineated samples, or implement a soil remedial action that allows residual contamination in accordance with N.J.A.C. 7:26F-3.7.

(c) After the owner has implemented an in situ remedial action in an area previously delineated in accordance with (a) above, the owner shall drill soil borings within and at the boundaries of the horizontal and vertical extent of the delineated contaminated area to confirm that the soil results comply with N.J.A.C. 7:26F-3.6by:

1. Collecting a minimum of two soil samples per 300 square feet, or fraction thereof, of the originally delineated area;

2. Where the originally contaminated area exceeds two feet in depth, collecting two additional soil samples per 300 square feet, or fraction thereof, of the originally delineated area for each additional two feet of depth; and

3. Biasing sampling to the originally delineated area and depths of greatest contamination identified during previous field screening or sampling events pursuant to (a) above.

(d) Except as set forth at N.J.A.C. 7:26F-3.7, an owner implementing a remedial action pursuant to this section shall analyze the soil samples to determine whether the remediation meets the requirements for an unrestricted use soil remediation in accordance with N.J.A.C. 7:26F-3.6:

1. If the analysis indicates that the soil remediation meets the requirements of N.J.A.C. 7:26F-3.6, then the owner shall complete the remediation pursuant to this chapter; or

2. If the analysis indicates that the soil remediation does not meet the requirements of N.J.A.C. 7:26F-3.6, then the owner shall continue to remediate the soil until analysis indicates that the remediation meets the requirements of N.J.A.C. 7:26F-3.6.

N.J. Admin. Code § 7:26F-3.5

Adopted by 50 N.J.R. 1715(b), effective 8/6/2018