N.J. Admin. Code § 7:26E-4.2

Current through Register Vol. 56, No. 9, May 6, 2024

Section 7:26E-4.2 - Remedial investigation of soil

(a) The person responsible for conducting the remediation shall conduct a remedial investigation of contaminated soil as follows:

1. Within the property boundary:

i. Delineate the horizontal and vertical extent of all soil contamination that is associated with a site-related area of concern in both the saturated and unsaturated soil to:

(1) The residential direct contact soil remediation standard; or

(2) The non-residential direct contact soil remediation standard if a remedial action will be implemented that will appropriately restrict the use of the entire property and the property owner has agreed to place a deed notice and engineering controls, as appropriate, on the property; or

ii. If the property owner has agreed to restrict the use of the entire property and to place a deed notice and an engineering control on the entire property, then delineation of the horizontal and vertical extent of all soil contamination associated with a site-related area of concern to a direct contact soil remediation standard is not required provided the requirements of (a)2 through 5 below are met;

2. Outside the property boundary, delineate the horizontal and vertical extent of all soil contamination associated with a site-related area of concern in both the saturated and unsaturated soil to the residential direct contact soil remediation standard;

3. For soil contamination associated with a site-related area of concern, delineate the horizontal and vertical extent of all soil contamination in the unsaturated zone which contains contaminants above the impact to ground water soil remediation standard without regard to the property boundary;

4. Delineate the horizontal and vertical extent of free product and residual product in both the saturated and unsaturated zones without regard to the property boundary; and

5. Whenever historic fill material is present, conduct a remedial investigation of historic fill material pursuant to 7:26E-4.7.

(b) The person responsible for conducting the remediation shall conduct a remedial investigation of soil by:

1. Collecting a sufficient number of soil samples to delineate the horizontal and vertical extent of all soil contamination;

2. Collecting all soil samples using appropriate sampling methods; and

3. Analyzing all soil samples for the contaminants of concern using appropriate analytical methods.

(c) The person responsible for conducting the remediation may delineate soil contamination through post remedial action sampling, if appropriate.

N.J. Admin. Code § 7:26E-4.2