When a vapor intrusion issue is identified as a concern, what is the extent of detail required to identify the subsurface utilities within 200 feet as required in N.J.A.C. 7:26E-1.18(b)?
Consult the Department’s current Vapor Intrusion Guidance to establish the extent of this assessment. Recognizing that this guidance is currently undergoing revisions, the following approach should be implemented in the interim. When single family residences, including rowhouses and townhouses, or other small inhabited structures are identified within the receptor evaluation distance criterion of 200 feet as required in N.J.A.C. 7:26E-1.18(b), it is assumed that service lines (e.g., water, gas, sewer, cable, etc.) run to each structure. Therefore, additional work is not necessary to identify the specific location of each service line, determine other information about these services lines, or to show them on a figure or map. However, all lateral lines servicing large residential buildings or units; commercial, retail, or industrial buildings; or main lines servicing groups of single family residences shall be identified, as well as utility vaults or other underground structures. These
