Chapter 9. ENGINEERING EVALUATION/COST ANALYSIS

EP 1110-1-18

24 Apr 00

CHAPTER 9

ENGINEERING EVALUATION/COST ANALYSIS

9-1. Introduction.

a. This chapter presents an overview of the EE/CA phase of an OE response action. An

EE/CA must be completed for all NTCRAs, as required by the NCP. The OE Design Center is

responsible for executing the EE/CA phase.

b. The purpose of the EE/CA is to identify the most appropriate response action to address

an OE risk at a project site. The determination of the recommended response alternative occurs

following the completion of a site characterization, risk assessment of OE hazards present at the

site, and evaluation of potential response alternatives. The data generated to support the

selection of a response alternative is presented in an EE/CA report. The components of the

EE/CA phase are illustrated in Figure 9-1 and explained in paragraphs 9-2 through 9-8 of this

chapter.

c. If an imminent hazard is discovered during the EE/CA phase, a TCRA may be initiated.

Upon completion of the TCRA, the NTCRA process will resume. The TCRA process is

discussed in Chapter 5.

a. Overview. EE/CA Reconnaissance (RECON) is an optional task within the EE/CA

phase. If implemented, the RECON task is the first element of the EE/CA phase. The decision

to implement the RECON task is made by the OE project team on a project-by-project basis

following an evaluation of the site-specific data gathered during the PAE and SI phases. The

government or its A-E may complete the RECON task.

b. Objectives.

(1) The objectives of the RECON task are to:

(a) Build upon site-specific data gathered during the PAE and SI phases.

(b) Gather detailed information that can be used by the OE project team to refine the SOW

and IGE for the subsequent EE/CA investigation.

(c) Determine whether the OE response should proceed directly to a removal action.

(d) Reduce the study areas or modified sector approaches for the EE/CA investigation.

9-1